83results about How to "Avoid unmeasured" patented technology

The invention belongs to the technical field of precision measurement and the field of optical engineering and specifically relates to a combination zeroing laser large working distance auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system; according to the method, via adjustment of the reflecting mirror, a reflected light beam is enabled to return to a center of an image plane of the feedback imaging system; an angular deflection measurement device on the reflecting mirror is used for obtaining angular variation of a surface of an object being tested. Because the reflecting mirror is added in a traditional auto-collimation angle measurement system, a problem that measurement cannot be realized when light reflected by the object being tested is deviated from a measurement system can be prevented; an auto-collimation working scope can be expanded while working distance remains the same or working distance is increased while the auto-collimation working scope remains the same; via specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the combination zeroing laser large working distance auto-collimation device is enabled to be simple in structure and low in manufacture cost; measurement operation can be conducted even in unstable measurement environments, and a technical advantage of rapid measurement can be gained.

The invention discloses an optical material high temperature transmittance testing device. The device adopts a silicon carbide rod as an infrared source, adopts a narrow band filter for filtering and providing infrared monochromatic light, adopts a chopper to modulate the infrared light, adopts a precise temperature control furnace to heat a sample material, uses the alternating current phase locked amplification technology to measure an infrared signal, and uses a planar reflecting mirror group to split one beam of infrared light into two beams for a sample light path and a reference light path respectively. As a result, the high temperature transmittance of the infrared band with temperature ranging from room temperature to 700 DEG C and wavelength ranging from 1 micron to 14 microns can be measured.

The invention provides a JCO steel pipe forming shape-adjusting process, and belongs to the technical field of steel pipe manufacturing. The process comprises the steps of determining pressing pass numbers; calculating the theoretical reduction amount and the theoretical chord height of each pass, wherein the theoretical chord height is the chord height corresponding to the measuring chord, and the measuring chord is the chord corresponding to the inner arc molded through pressing; and pressing a steel plate, after each-pass pressing, measuring the actual chord height corresponding to the theoretical chord height, and according to the difference value between the actual chord height and the theoretical chord height, adjusting the theoretical reduction amount until pressing of all passes can be finished. According to the JCO steel pipe forming shape-adjusting process, the geometric dimensioning precision of a pipe formed through the JCO process is improved, and the shape-adjusting efficiency is improved.

The invention relates to the field of medical electrocardio signal guarding, in particular to an electrocardio leading mode intelligent switching method and an electrocardio leading mode intelligent switching device. The lead automatic switching technology is used for avoiding the problem that an electrocardio signal can not be measured due to the fact that a driving lead wire drops. A user can continue to measure the electrocardio signal without manually switching to other modes or reconnecting the driving lead wire. The electrocardio leading mode intelligent switching device is time-saving, convenient and better in user experience.

The invention discloses a vision measurement specular reflection light interference suppression method. The method is different from the existing methods which realize imaging by utilizing artificialmarking point surface reflected light, but realizes imaging by utilizing the excitation radiation light of the artificial marking points under a specific light source, and cuts off the mirror reflected light through an optical gating method and only accepts the excited radiation light of the artificial marking points so as to eliminate the problem of glare interference caused by the specular reflected light, improve the robustness of the vision measurement system and avoid the problem of impossibility of measurement or false measurement results caused by the glare interference.

The invention belongs to the technical field of precision measurement and the field of optical engineering and specifically relates to a high precision, wide range and large working distance laser auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system; according to the method, via adjustment of the reflecting mirror, a reflected light beam is enabled to return to a center of an image plane of the feedback imaging system; an angular deflection measurement device on the reflecting mirror is used for obtaining angular variation of a surface of an object being tested. Because the reflecting mirror is added in a traditional auto-collimation angle measurement system, a problem that measurement cannot be realized when light reflected by the object being tested is deviated from a measurement system can be prevented; an auto-collimation working scope can be markedly expanded while working distance remains the same or working distance is markedly increased while the auto-collimation working scope remains the same; via specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the high precision, wide range and large working distance laser auto-collimation device is enabled to be characterized by simple structure and low manufacture cost; rapid measurement can be realized.

The invention belongs to the technical field of precise measuring and the field of optical engineering, and particularly relates to a high-accuracy laser large-working-distance auto-collimation device and method. The device is composed of a laser source, a collimation lens, a reflector and a feedback imaging system. The method includes the steps that the reflector is adjusted, a reflected laser beam returns to the center of the image surface of the feedback imaging system, and then angle changes of the surface of a measured object are obtained through an angle deflection measuring device on the reflector. As the reflector is additionally arranged on a traditional auto-collimation angle measuring system, the problem that as lasers reflected by a measured object deviate from the measuring system, measuring can not be carried out is solved, and then the technical advantage that the auto-collimation working range is expanded with the same working distance or the working distance is increased within the same auto-collimation working range is achieved; in addition, due to the specific design of the collimation lens, the feedback imaging system, the reflector and the like, the device and method have the advantages that the structure is simple, the manufacturing cost is low, the stability of the measuring environment can be monitored, and rapid measuring can be achieved.

The invention relates to the field of precision measurement technology and the field of optical engineering and in particular relates to a portable combined zero setting high precision laser large working distance auto-collimation device and method. The device comprises a light source, a collimating mirror, a reflector, and a feedback imaging system. The method makes reflected light beams return to the image plane center of the feedback imaging system by adjusting the reflector and obtains the angle change of the surface of a measured object by means of an angle deflection measuring device on the reflector. The reflector is added to a conventional auto-collimation angle measuring system, so that the problem that measurement is impossible because reflected light of a measured object deviates from the measuring system is solved and the auto-collimation working range is increased on the condition of the same working distance or the working distance is increased on the condition of the same working range. Owing to the specific design of the collimating mirror, the feedback imaging system and the reflector, the device is small, portable, and high in measurement precision, can monitor the stability of measurement environments, and can perform measurement rapidly.

The invention belongs to the precision measurement technology field and the optical engineering field and especially relates to a high-precision, wide-range and large-work-distance auto-collimation device and a method thereof. The device is formed by a light source, a collimating mirror, a reflecting mirror and a feedback imaging system. In the method, through adjusting the reflecting mirror, a reflected light beam is returned to a feedback imaging system image plane center; and through using an angle deflection measurement apparatus on the reflecting mirror, an angle change of a measured object surface is acquired. Because the reflecting mirror is added on a traditional auto-collimation angle measurement system, a problem that measured object reflection light deviates the measurement system so that measurement can not be performed can be avoided. Under a same work distance, an auto-collimation work range is increased, or under the same work range, the work distance is increased. Besides, because of specific designs of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the structure is simple and manufacturing cost is low; under a low sampling frequency, measured precision is high and rapid measurement can be reached.

The invention belongs to the field of precision measurement technology and optical engineering, and specifically relates to an array zero-setting laser large working distance auto-collimation device and method. The device is composed of a light source, a collimating mirror, a reflector and a feedback imaging system. In the method, by adjusting the reflector, a reflected beam is returned to the center of an image plane of the feedback imaging system, and then an angular deflection measuring device on the reflector is used to obtain angle changes of the surface of a measured object. In the invention, since the reflector is added to the conventional auto-collimating angle measuring system, it is possible to avoid the problem that measuring can not be carried out since reflected light of the measured object deviates from the measuring system, so that the advantage of increasing the auto-collimation range at the same working distance or increasing the working distance in same auto-collimation range are realized. In addition, the specific design of the collimating mirror, the feedback imaging system, the reflector and the like make the device of the invention simple in structure, low in production cost, and capable of performing measurement in an unstable measurement environment; and a technical advantage of rapid measurement is realized.

The invention discloses a method for improving alignment precision after epitaxial growth, which comprises the following steps: forming a null layer on a substrate by photoetching, wherein the pattern section structure of the null layer is lower than the substrate; depositing to generate a protective layer on the substrate after the null layer is formed, wherein the protective layer is filled into the null layer; photoetching again by a dry process or a wet process to remove the protective layer on the surface of the substrate; and growing an epitaxial layer on the substrate. The invention can avoid the problem that the null area is flattened and can not be measured after epitaxy occurs, greatly improves the accuracy of measuring the alignment precision in epitaxial growth, and enables the production of epitaxial products with small sizes to be possible.

The invention discloses a device for measuring coaxiality deviation of a rotary transformer stator and a rotor. The device comprises a resolver stator support for installing a rotary transformer stator, a resolver rotor support for installing a rotary transformer rotor and a scanning camera, the rotary transformer rotor support and a rotary transformer rotor are relatively fixed and can rotate synchronously, the scanning camera is installed at the top of the rotary transformer rotor support through a camera support, and a camera body of the scanning camera vertically faces an air gap between the rotary transformer rotor and the rotary transformer stator. The device has the beneficial effects that by adopting a non-contact measurement scheme, the measurement efficiency is improved, and themeasurement error caused by the uneven surface of a workpiece in the traditional contact measurement method is solved; the width of the air gap between the inner edge of the stator and the outer edgeof the rotary transformer rotor is directly measured through the scanning camera, and the obtained coaxiality deviation value is higher in precision and better in applicability compared with a traditional indirect measurement method for measuring the axis of the stator and the axis of the rotor.

Provided is a resistivity measurement method of a rock and ore specimen. One end of a resistance box is connected with one end of the rock and ore specimen, and a given voltage is applied between the other end of the resistance box and the other end of the rock and ore specimen. First, the resistance of the resistance box is adjusted to be a large value, the resistance box is ensured to be passed through a safe supply current even the resistivity of the rock and ore specimen is low under the given supply voltage, if the current passing through the resistance box is large, the resistance R1 of the resistance box is increased, then U1 and U2 are measured again, and R2 and the resistivity are calculated. According to the invention, direct measurement of the current is prevented, and high-precision measurement of the current is realized through measuring the voltage of a high-precision resistor loaded on the resistance box, hence the problem that the current is too large or too small to measure caused by the measurement current directly though an ammeter is prevented.

The invention discloses a planar two-dimensional displacement sensor based on an eddy current effect. The sensor comprises a movable ruler and a fixed ruler, the fixed ruler comprises a fixed ruler base body and m conductive metal plates arranged according to a matrix, and the length and the width of each conductive metal plate are that the center distance between two adjacent conductive metal plates in an X direction and a Y direction is W; the movable ruler comprises a movable ruler base body and four planar rectangular spiral coils, and the four planar rectangular spiral coils are arranged according to a 2*2 matrix; according to the length and the width of each planar rectangular spiral coil, the four planar rectangular spiral coils are connected with alternating current excitation electric signals with the same phase, and when the movable ruler moves in parallel in an XY plane relative to the fixed ruler, the impedance of each planar rectangular spiral coil is converted into an electric signal through an alternating current bridge; and linear displacement of the movable ruler relative to the fixed ruler in the X and Y directions is acquired through processing. The structure can be simplified, the applicability is improved, and the influence of a machining process on a measurement result is reduced.

The invention provides a virtual sensor. A simulation relationship model is set by a setting unit, the simulation relationship model is stored by a storage unit, parameters of the simulation relationship model are directly measured by a physical sensor, the physical sensor is mounted at the position which can be measured by a device, the measured original parameters are sent by the physical sensorto a processing unit, and the original parameters are inputted by the processing unit into the simulation relationship model to calculate parameters of a measuring point. Since the indirect method isutilized to measure the parameters of the indirect measurement point of the device, a problem that the measuring point in the extreme environment cannot be measured or the measuring point of the device is not suitable for placing the physical sensor and the parameters of the measuring point cannot be acquired is avoided. The virtual sensor is advantaged in that the virtual sensor can not only adapt to measurement when the measuring point is in the extreme environment or the measuring point is not suitable for placing the physical sensor, but also the cost is low.

The invention belongs to the technical field of precision measurement and the field of optical engineering and specifically relates to a portable array zeroing high precision laser large working distance auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system; according to the method, via adjustment of the reflecting mirror, a reflected light beam is enabled to return to a center of an image plane of the feedback imaging system; an angular deflection measurement device on the reflecting mirror is used for obtaining angular variation of a surface of an object being tested. Because the reflecting mirror is added in a traditional auto-collimation angle measurement system, a problem that measurement cannot be realized when light reflected by the object being tested is deviated from a measurement system can be prevented; an auto-collimation working scope can be expanded while working distance remains the same or working distance is increased while the working scope remains the same; via specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the portable array zeroing high precision laser large working distance auto-collimation device is enabled to be small in size, high in portability and great in measurement precision; stability of a measurement environment can be monitored, and a technical advantage of rapid measurement can be gained.

The invention relates to a contactless twelve-lead electrocardiogram signal acquisition system, belonging to the field of medical electronics, which is composed of a contactless electrocardiogram acquisition collector, a signal filtering and amplifying module, an A / D module, a microprocessor, a liquid crystal display module, a wireless communication module, a microprocessor and a power managementsystem. The non-contact ECG collecting electrode is connected with the signal filtering and amplifying module through a signal line. The filtering amplification module is electrically connected with the A / D module, the microprocessor is connected with the A / D module, the wireless communication module and the liquid crystal display module; the power management system is connected with the signal filtering and amplifying module and the microprocessor through the power line and the control bus respectively. The collected signals are sent to the processor for processing.

The invention belongs to the technical field of precision measurement and the field of optical engineering and particularly relates to a portable high-dynamic-precision large-working-distance auto-collimation device and method. The device is composed of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system. The method includes the steps that the reflecting mirror is adjusted, reflected light beams return to the center of the image surface of the feedback imaging system, and the angle change of the surface of a measured object is acquired through an angle deflection measuring device on the reflecting mirror. Due to the fact that the reflecting mirror is additionally arranged on a traditional auto-collimation angle measuring system, the problem that due to the fact that reflected light of the measured object deviates from the measuring system, measurement cannot be carried out can be avoided, and then the advantage that the auto-collimation working range is increased at the same working distance or the working distance is increased within the same working range is achieved; in addition, through the specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the device and method further have the technical advantages that the device is small, portable and high in measuring precision; the assembly process of the measured object can be monitored in the whole course; measurement is rapid.

The invention relates to the field of medical electrocardiosignal monitoring, in particular to an automatic electrocardiograph work mode switching method and an automatic electrocardiograph work mode switching device. According to the technical scheme, an automatic lead switching technology is adopted, and the problem that electrocardio cannot be measured due to dropping of a driving lead is solved. The automatic electrocardiograph work mode switching device is time-saving and convenient when used by a user; electrocardio signals can be continuously measured without manually switching an electrocardiograph work mode into another mode or reconnecting and driving a lead line; and the user experience is high.

The invention belongs to technical field of precision measurement and the field of optical engineering and particularly relates to a high-dynamic-precision large-working-distance self-collimating device and method. The high-dynamic-precision large-working-distance self-collimating device consists of a light source, a collimating lens, a reflector and a feedback imaging system. According to the method, a reflected light beam returns to the image plane center of the feedback imaging system by adjusting the collimating lens, and then angle change of the surface of a measured object is obtained by utilizing an angle deflection measurement device on the reflector. Due to the fact that the reflector is added on a traditional self-collimating angle measurement system, the problem that the reflected light of the measured object deflects from the measurement system and accordingly measurement cannot be performed can be avoided, a self-collimating work range is further added under the condition of the same working distance, and the technical advantages of the working distance are increased in the same self-collimating work range. In addition, the specific designs of the collimating lens, the feedback imaging system, the reflector and the like make the high-dynamic-precision large-working-distance self-collimating device further have the technical advantages of being simple in structure, low in manufacturing cost and meanwhile capable of monitoring the assembly process of the measure object in the whole process and achieving rapid measurement.

The invention discloses a vehicle load measuring method and device. The method comprises the following steps of: setting a first parameter of a to-be-measured vehicle according to the model of the to-be-measured vehicle; controlling the vehicle speed of the to-be-detected vehicle to reach a preset vehicle speed interval, obtaining a message from a vehicle-mounted CAN bus according to a preset sampling interval, and obtaining a second parameter according to the message; acquiring a third parameter of a road on which the to-be-detected vehicle travels from the vehicle-mounted CAN bus on the basis of a vehicle-mounted electronic map at a preset sampling interval; and performing digital filtering on the second parameter and the third parameter, and combining the second parameter and the third parameter subjected to digital filtering with the first parameter to calculate the load value of the to-be-measured vehicle. According to the vehicle load measuring method and device of the embodiment of the invention, the multiple vehicle-mounted bus data of the to-be-measured vehicle are used as the calculation basis for measuring the load, and multiple times of calibration according to different vehicle types and mounting of strain gauges on vehicle frames for load measurement are not needed. The method and device are suitable for various vehicle types, can improve measurement efficiency, reduce measurement cost and effectively improve the test accuracy of the vehicle load.

The invention relates to an atmospheric aerosol smog system for measuring particle size distribution of particulates in a simulation environment. The atmospheric aerosol smog system comprises a combustion device for simulating open burning of a biomass, an aerosol smog chamber for simulating an atmospheric pollutant to discharge to an atmosphere, and a particulate particle size and concentration measuring instrument, wherein the combustion device, the aerosol smog chamber and the particulate particle size and concentration measuring instrument are connected sequentially. The atmospheric aerosol smog system for measuring the particle size distribution of the particulates in the simulation environment provided by the invention simultaneously has three functions, and simulates the process ofthe open burning of the biomass to discharge the atmospheric pollutant accurately and authentically; the physicochemical reaction of the atmospheric pollutant, generated by open burning of crop straw,at each height of a convection layer or even an advection layer is simulated artificially, controllably and repeatedly; meanwhile, the influences of factors such as complex weather and terrain in anactual environment are eliminated; and the particle size distribution of the particulates in the simulation environment is obtained accurately via a WPS-1000XP wide-range particle spectrometer, and the degree of accuracy is high, so the defect that the particle size distribution of the particulates cannot be measured or is measured inaccurately is prevented.

The invention belongs to the technical field of precise measurement and the field of optical engineering, and concretely relates to a portable high-precision laser long-working distance auto-collimation apparatus and a method thereof. The apparatus is composed of a light source, a collimating mirror, a reflector and a feedback imaging system. The method comprises the following steps: the reflector is adjusted to make reflected light beams return to the center of the image plane of the feedback imaging system, and an angle deflection measuring device on the reflector is used to obtain the angle change of the surface of a measured object. The reflector is arranged on a traditional auto-collimation angle measurement apparatus, so the problem of unable measurement caused by deviation of the reflected lights of the measured object from the measurement system is avoided, thereby the auto-collimation working range is increased under a same working distance, or the working distance is increased under a same auto-collimation working range. The concrete design of the collimating mirror, the feedback imaging system and the reflector makes the apparatus have the advantages of small size, portability, high measurement precision, monitoring of the stability of monitored environment, and high measurement speed.

The invention relates to the field of precision measurement technology and the field of optical engineering and in particular relates to a portable array zero setting laser large working distance auto-collimation device and method. The device comprises a light source, a collimating mirror, a reflector, and a feedback imaging system. The method makes reflected light beams return to the image plane center of the feedback imaging system by adjusting the reflector and obtains the angle change of the surface of a measured object by means of an angle deflection measuring device on the reflector. The reflector is added to a conventional auto-collimation angle measuring system, so that the problem that measurement is impossible because reflected light of a measured object deviates from the measuring system is solved and the auto-collimation working range is increased on the condition of the same working distance or the working distance is increased on the condition of the same auto-collimation working range. Owing to the specific design of the collimating mirror, the feedback imaging system and the reflector, the device is small, portable, and high in measurement precision, can perform measurement in unstable measurement environments, and can perform measurement rapidly.

The invention belongs to the technical field of precision measurement and the field of optical engineering, and particularly relates to a combined zeroing high-precision laser large-working-distance auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflecting mirror, and a feedback imaging system. According to the method, a reflecting light beam returns to an image surface center of the feedback imaging system by adjusting the reflecting mirror, and the angle change of the surface of a measured object by using an angle deflection measurement device on the reflecting mirror. Due to addition of the reflecting mirror to a traditional auto-collimation angle measurement system, the problem that the measured object cannot be measured due to deflection of reflecting light of the measured object from the measurement system can be avoided, thereby having the advantages of expansion of an auto-collimation working range under the same working distance or increase of the working distance under the same auto-collimation working range. Besides, due to specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the combined zeroing high-precision laser large-working-distance auto-collimation device has the technical advantages of simple structure, low manufacturing cost, ability to monitor the stability of a measurement environment, and quick measurement.

The invention relates to a gap measuring device and application thereof to gap measurement of four doors and two covers of an automobile. The device comprises an upper component and a lower componentwhich are fixedly connected with each other, wherein the upper component comprises an upper shell, a second copper sheet and a patch sensor; the second copper sheet comprises a second copper sheet fixing part and a second copper sheet bending part with restoring force which are connected integrally in sequence; the patch sensor is positioned on the upper surface of the second copper sheet bendingpart; the lower component comprises a lower shell and a positioning part which is positioned in the lower shell and is used for fixing at a gap; and the second copper sheet fixing part extends to thespace between the upper shell and the lower shell, and is clamped and fixed by the upper shell and the lower shell. Through the adoption of the device, the situation that data cannot be measured due to the limitation of measurement space is well avoided, and the inner gap data of any point on a door frame can be measured accurately. The gap measuring device has the advantages of saving of preparation time, convenience in use, higher efficiency, wide application range and greater benefit.

The invention belongs to the technical field of precise measurement and the field of optical engineering, and specifically relates to a portable array zero setting high-dynamic-precision large working-distance auto-collimation device and method. The device is composes of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system. The method is characterized in that the reflecting mirror is adjusted to enable a reflecting light beam to be fed back to the image surface center of the feedback imaging system, and an angle deflection measuring device on the reflecting mirror is utilized to obtain the angle change of the surface of a detected object. The reflecting mirror is added to a conventional auto-collimation angle measuring system, so that the problem that light reflected by the detected object deviates from the measuring system and the measurement is unavailable is avoided, the auto-collimation working range is increased under the identical working distance, or the advantages of the working distance are increased under the identical working range; the specific design of the collimating mirror, the feedback imaging system and the reflecting mirror facilitates the miniaturization, portability and high measurement precision of the device; the assembling process of the detected object is monitored in the whole process; and rapid measurement is available.

The invention belongs to the technical field of precision measurement and the field of optical engineering and specifically relates to a combination zeroing laser large working distance auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system; according to the method, via adjustment of the reflecting mirror, a reflected light beam is enabled to return to a center of an image plane of the feedback imaging system; an angular deflection measurement device on the reflecting mirror is used for obtaining angular variation of a surface of an object being tested. Because the reflecting mirror is added in a traditional auto-collimation angle measurement system, a problem that measurement cannot be realized when light reflected by the object being tested is deviated from a measurement system can be prevented; an auto-collimation working scope can be expanded while working distance remains the same or working distance is increased while the auto-collimation working scope remains the same; via specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the laser large working distance auto-collimation device is enabled to be simple in structure and low in manufacture cost; measurement operation can be conducted even in unstable measurement environments, and a technical advantage of rapid measurement can be gained.

The invention discloses a water depth measuring device, which comprises a despooling rod, supports and a sound wave excitation device. Grooves are formed in the upper end faces of the supports; fixingbands are fixed to one sides of the grooves; the despooling rod is placed on the grooves; the supports are connected through telescopic rods; a third guide roller is arranged at one end of the despooling rod; a line position adjusting piece and a spool are arranged on the despoiling rod; a measuring line penetrates through the line position adjusting piece; a spring loaded thrust meter and a first guide roller are connected to one end of the measuring line; a second guide roller is connected onto the first guide roller through the measuring line; a floating plate is connected to the other endof the measuring line; a heavy punch is connected under the floating plate; a fixing plate is connected to the lower end face of the heavy punch; two flange plates are arranged on the fixing plate; the sound wave excitation device and a sound wave reception device are arranged on the flange plates; an excitation probe is electrically connected into the sound wave excitation device; a probe sensoris electrically connected into the sound wave reception device. The water depth measuring device provided by the invention is cheap, light, simple, and suitable to be popularized and used in public.

The invention belongs to the technical field of precision measurement and the field of optical engineering and particularly relates to a portable high-dynamic-precision large-working-distance auto-collimation device and method. The device is composed of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system. The method includes the steps that the reflecting mirror is adjusted, reflected light beams return to the center of the image surface of the feedback imaging system, and the angle change of the surface of a measured object is acquired through an angle deflection measuring device on the reflecting mirror. Due to the fact that the reflecting mirror is additionally arranged on a traditional auto-collimation angle measuring system, the problem that due to the fact that reflected light of the measured object deviates from the measuring system, measurement cannot be carried out can be avoided, and then the advantage that the auto-collimation working range is increased at the same working distance or the working distance is increased within the same working range is achieved; in addition, through the specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the device and method further have the technical advantages that the device is small, portable and high in measuring precision; the assembly process of the measured object can be monitored in the whole course; measurement is rapid.