44results about How to "Fast measurement results" patented technology

The invention discloses a bidirectional magnetic saturated time difference fluxgate sensor, which is characterized in that two ends of a sensor magnetic core are wound with exciting coils, the middle section of the sensor magnetic core is wound with induction coils, output poles of the induction coils are connected with an amplifying circuit, and the amplifying circuit is connected with a counting display circuit through a band-pass filter circuit and a retardation shaping circuit. By detecting and calculating a positive negative pulse time difference value output by the fluxgate sensor in a time domain, the strength of the measured magnetic field is judged. Compared with the prior fluxgate sensor, the detection circuit is simple, the measurement stability of the system is ensured without a feedback structure, a complex subsequent circuit is not needed, the required excitation current is lower, the data processing is simple, the measured relative quantity is little, the integral volume and power consumption of the sensor are effectively reduced, and the measurement result is acquired quickly. The fluxgate sensor avoids a filter-phase-sensitive demodulation-smooth filter circuit of the prior fluxgate sensor, makes up the defect that the prior fluxgate sensor has harsh process requirement, and achieves the digitized magnetic measurement of the fluxgate sensor.

The invention provides a detecting device for detecting lateral pressure of a great-mobility concrete template and relates to a detecting device for detecting the lateral pressure of a concrete template, in order to solve the problems, such as large mould size, large concrete consumption, limited detection height and inaccurate measurement result existing in the traditional lateral pressure laboratory detection of a concrete template. An upper plate of the detecting device is exactly arranged on an lower plate of the detecting device, wherein two struts are arranged between the upper plate and the lower plate; a steel cylinder chassis is arranged on the upper end face of the lower plate; a round steel cylinder is arranged on the upper end face of the steel cylinder chassis; a steel cylinder sealing piston is arranged in the round steel cylinder and at the upper end; a screw jack is arranged on the upper end face of the steel cylinder sealing piston; a pressure sensor is fixed on the lower end face of the lower plate; a data acquisition display instrument is arranged on the upper end face of the upper plate; two pressure transducers are symmetrically arranged on the side wall of the round steel cylinder; the diameter of the inner cavity of the round steel cylinder is 200mm; and the height of the round steel cylinder is 400mm. The detecting device is used for detecting the lateral pressure of the great-mobility concrete template.

The invention relates to a method to test the constitution of hydrogenation tail oil paraffin group by near infrared optical spectrum. It builds up models of paraffin, alkane, and isoalkane by alkene cracking device, and aromatics reformer and oil refining hydrogenation unit. And the content of paraffin, alkane, and isoalkane would be calculated by using the models. It has the advantages of convenient, rapid and accurate.

The invention discloses a rice sensory evaluation instrument, rice texture characteristic replacement sensory evaluation and a testing method. The testing method is used for testing the texture characteristics of rice, and belongs to the technical field of food detection, which solves the problems that the testing method of the texture characteristics in the prior art has unstable test results andlarge deviation of test data. The method of the present invention comprises the following steps: 1) a rice sampling step, taking out a specified amount of rice from a cooking utensil and cooling therice; 2) a sample preparation step: preparing a rice cake sample by using the cooled rice; 3) a sample testing step: placing the rice cake sample on a texture analyzer, applying a test probe of the texture analyzer to apply the pressure the upper surface of the rice cake sample, and obtaining the texture parameter of the rice cake sample, wherein the test probe has an action area on the rice cakesample which is larger than the upper surface area of the rice cake sample.

The invention relates to a method to test the constitution of hydrogenation tail oil naphthenic hydrocarbon group and arene group by near infrared optical spectrum. It builds up models of naphthenic hydrocarbon, 1-naphthenic hydrocarbon, 2- naphthenic hydrocarbon, 3- naphthenic hydrocarbon, 4- naphthenic hydrocarbon and arene by alkene cracking device, and aromatics reformer and oil refining hydrogenation unit. And the content of naphthenic hydrocarbon, 1-naphthenic hydrocarbon, 2- naphthenic hydrocarbon, 3- naphthenic hydrocarbon, 4- naphthenic hydrocarbon and arene would be calculated by using the models. It has the advantages of convenient, rapid and accurate.

The invention discloses a digital shot blasting coverage rate measurement method based on a computer vision technology, and belongs to the technical field of digital image processing. The method comprises the steps of image acquisition, gray scale conversion, noise elimination, region segmentation, binarization processing, filling, pseudo connection elimination and statistics, and image processingfor surface dents after shot blasting of a plate. A computer program is adopted for shot blasting image processing, the consistency of multiple times of measurement is guaranteed, the measurement error is controlled within 5%, the measurement and calculation speed is high, the method does not depend on personal experience, the compatibility with other computer-aided manufacturing equipment is good, the portability is good, and possibility is brought to detection feedback link work in automatic shot blasting control circulation.

The invention discloses fast formaldehyde detection equipment with low power consumption. The fast formaldehyde detection equipment comprises a formaldehyde detector and intelligent terminal equipment in wireless communication with the formaldehyde detector, wherein the formaldehyde detector comprises an ARM processor, an inspiration control unit, a getter pump, an airflow chamber, an electrochemical sensor, a temperature sensor, a 3G monitoring / alarming unit, a WiFi module, an audible and visual alarm unit and a calibration setting key, the ARM processor controls the inspiration control unit to drive the getter pump to suck air into the airflow chamber, the electrochemical sensor and the temperature sensor are used for acquiring concentration and temperature signals of formaldehyde in the air and transmitting the signals to the ARM processor to calculate the concentration and temperature of formaldehyde after respectively conditioning the signals, the 3G monitoring / alarming unit or the WiFi module transmits the concentration and temperature of formaldehyde to the intelligent terminal equipment in a wireless manner for data storage and analysis processing, and feeds back the concentration and temperature of formaldehyde to the ARM processor, and when the concentration or temperature exceeds the standard, such alarms as short messages and emails are made and the audible and visual alarm unit is controlled to give an alarm. The fast formaldehyde detection equipment disclosed by the invention is used for detecting formaldehyde data quickly and intelligently with high precision and can be used for continuously measuring for a long time.

The invention discloses an absolute grating scale and a measuring method based on a CMOS image sensor, the absolute grating scale comprises a grating scale main body, an optical amplification system, a CMOS image sensor, a signal processing module and a master control module, a measurement code track and a subdivision code track are arranged on the grating scale main body, the optical amplification system is used for collecting light rays reflected or transmitted through the measurement code track and the subdivision code track, the light rays converge and are incident on the CMOS image sensor, the CMOS image sensor is used for collecting the reached light signal to obtain an analog image of the present measuring position and transmitting the analog image to the signal processing module, the signal processing module is used for converting the analog image into a digital image and transmitting the digital image to the master control module, and the master control module is used for processing the digital image to separately obtain a rough measurement position value and a subdivision position value and combining the position values to obtain an absolute position measured value. According to the invention, the measurement accuracy is high, the measurement resolution is greatly improved, and the grating scale and the method can be widely applied in grating measurement industry.

The invention provides a top plate levelness detection device which comprises a supporting adjusting base, a vertical supporting rod, a horizontal supporting plate, a first laser distance measuring sensor, a horizontal telescopic adjusting rod, a second laser distance measuring sensor and a distance measuring control terminal. The horizontal supporting plate is fixedly arranged at the top of the vertical supporting rod, the first laser distance measuring sensor is vertically arranged on the horizontal supporting plate, the U-shaped hinge seats are symmetrically and fixedly arranged on the left side and the right side of the horizontal supporting plate respectively, and the fixed ends of the horizontal telescopic adjusting rods are hinged into the U-shaped hinge seats. And a second laser distance measuring sensor is arranged at the end part of the horizontal telescopic adjusting rod. By utilizing the device, the vertical distance of five test points can be accurately measured, meanwhile, the range values of five groups of data can be synchronously calculated and recorded, and the detection efficiency of the levelness of the top plate is improved.

The invention discloses a miniature three-dimensional measurement system based on digital fringe projection. The miniature three-dimensional measurement system comprises a digital fringe projector (100) and a miniature measurement terminal (200). Digital fringes projected by a DLP projector (101) in the digital fringe projector (100) form a digital fringe graph meeting the requirements of coherent optical fiber bundles (300) for transmission through combination of a first lens (102), a second lens (103) and a first collimating lens (104). The digital fringe graph in the miniature measurement terminal (200) is projected onto the surface of an object (400) to be measured by sequentially passing through a third lens (201), an aperture diaphragm (202), a second collimating lens (203), a 45-degree reflector (204) and a third collimating lens (205). The modulated and deformed digital fringes are collected by a small-sized CCD camera (207) through the third collimating lens (205), the 45-degree reflector (204) and a fourth lens (206) and are transmitted to a computer (500). According to the miniature three-dimensional measurement system, three-dimensional shape information of the object in a narrow and small space can be obtained flexibly, the measurement speed and measurement accuracy are high, and the implementing method is simple.

The invention discloses a quick vibrating-wire sensor frequency measurement device, which comprises an improved excitation signal obtaining circuit, an excitation circuit and a signal conditioning circuit. The improved excitation signal obtaining circuit comprises a high-voltage power supply converter, an electronic switch, a voltage stabilization capacitor C1, a current-limiting resistor R1 and an energy-storage capacitor C2. The high-voltage power supply converter is connected in series with the electronic switch and the current-limiting resistor R1 in sequence; one end of the voltage stabilization capacitor C1 is connected between the high-voltage power supply converter and the electronic switch, and the other end of the voltage stabilization capacitor C1 is grounded; and one end of the energy-storage capacitor C2 is connected with one end of the current-limiting resistor R1, and the other end of the energy-storage capacitor C2 is grounded. The charging time of the device is one thousandth of the charging time when the capacitor is charged through an inductive circuit, so that the charging time of the device is far smaller than the charging time when the capacitor is charged through the inductive circuit; and excitation signals of a vibrating-wire sensor during working can be obtained at a faster speed, measuring result can be obtained more quickly, and quick measurement of the frequency of the vibrating-wire sensor is realized.

The application discloses a method and device for measuring the refractive index of soil by a V prism. The method comprises the following steps that: a soil sample to be measured is placed at a V-shaped gap of the V-shaped prism, and a layer of immersion liquid is filled between the soil sample to be measured and the V prism; a wireless electromagnetic-wave transmitter transmits electromagnetic wave beams vertical to an incident plane of the V prism, the electromagnetic wave beams are refracted when passing through the V prism and the soil sample to be measured, and the refracted electromagnetic wave beams are emerged through an an emergent plane of the V prism; a CCD (Charge Coupled Device) sensor is moved to respectively record position coordinates of the emerged electromagnetic wave beams sensed by the CCD sensor; and the position coordinates are substituted into a formula and the refractive index of the sample is obtained by calculation. The method and device disclosed by the application have the advantages that the traditional V prism method is improved, and the traditional glass prism is replaced into transparent ceramic, so that the measurement range of the refractive index is improved; simultaneously, due to adoption of the wireless electromagnetic-wave transmitter and the CCD sensor, the measurement accuracy is improved; and the measurement principle is simple and the benefit for rapidly obtaining a measurement result is achieved.

The invention relates to a multiparameter water quality analyzer which belongs to the technical field of water quality analysis. The multiparameter water quality analyzer comprises a temperature measurer, a pH value measurer, a salinity measurer, a total ammonia nitrogen measurer, a hydrogen sulfide measurer and a nitrite measurer. The output ends of the temperature measurer, the pH value measurer, the salinity measurer, the total ammonia nitrogen measurer, the hydrogen sulfide measurer and the nitrite measurer are respectively connected to the input end of a single-chip microcomputer system. In the invention, the temperature measurer, the pH value measurer, the salinity measurer, the total ammonia nitrogen measurer, the hydrogen sulfide measurer and the nitrite measurer are directly connected to the single-chip microcomputer system, and results are obtained through the calculation of the single-chip microcomputer. The six measurers are assembled into one analyzer, and thus, the invention is convenient to carry and fast and correct in measurement results.

The invention relates to a device (16) which is used to measure at least one component of a magnetic field. The inventive device comprises a magnetoresistive sensor (102) and a measuring chain (28). According to the invention, the input of the aforementioned measuring chain is connected to the magnetoresistive sensor (102), while the output thereof is intended to supply information that is representative of the magnetic field in the region of the sensor. In addition, the measuring chain (28) comprises means (136) for isolating a frequency component of the signal from the sensor representative of the magnetic field for a unique pre-determined frequency (FI).

The invention discloses a mobile on-line casting blank length measuring device which comprises an upper portion steel pipe, a lower portion steel pipe, supports, pulleys, a steel plate ruler, verniers and casing pipes. The two ends of the upper portion steel pipe and the two ends of the lower portion steel pipe are fixed on the two supports respectively. The upper portion steel pipe and the lower portion steel pipe are arranged in parallel, and the upper portion steel pipe is located on the upper portion of the lower portion steel pipe. The steel plate ruler is fixed on the lower portion of the lower portion steel pipe, and scales are arranged on the steel plate ruler. The pulleys are arranged at the bottoms of the supports. The two casing pipes are arranged on the upper portion steel pipes, and the two verniers are fixed on the two casing pipes respectively. The invention further discloses a measuring method of the mobile on-line casing blank length measuring device. According to the mobile on-line casting blank length measuring device and the measuring method of the mobile on-line casting blank length measuring device, the actual length of casting blank can be fed back in time, the precision of a cutting system is corrected according to the specific length which is fed back, the cutting errors of the on-line casting blank are reduced, the sizing qualification rate of the casting blank is ensured, and therefore the yield of the casting blank is improved.

The invention relates to a four-electrode testing device and a measuring method for the water content of tobacco. The water content of the tobacco is reflected by measuring the resistance of the tobacco through four electrodes as probes according to the specific function relationship between the resistance and the water content. The four-electrode testing device is formed in a way that a range selector is respectively connected with an electrode A, an electrode B, an electrode C and an electrode D through a singlechip computer and a resistance measuring circuit, and a PC (Personal Computer) is connected with a liquid crystal display circuit through a data uploading circuit and the singlechip computer. Compared with an infrared ray moisture meter, the four-electrode testing device disclosed by the invention has the characteristic that the measured result of the water content of the tobacco is prior to the precision and the efficiency of the infrared ray moisture meter. The influence from electrode polarization caused by measurement of single voltage through a pair of electrodes and the influence from offset voltage caused by measurement through single-direction power supply of the electrodes are overcome, so that the precision is increased; and the deviation of zone selection during measurement of a pair of electrodes is overcome, and thus the credibility of the measurement result is improved. A detection circuit is simple, the requirements on the color, shape and specification of the materials and light of a measurement environment are lower, the measurement result can be obtained more quickly and the water content inside the materials can be measured.

The invention discloses a sheet metal visual inspection acquisition terminal and method. The terminal includes a visual capture unit, a part measurement platform and a light homogenizing unit. The light homogenizing unit includes a delay board, a controller, light sensors, a computer control switch, a frame, and a light homogenizing board and dedicated light tubes, wherein the light homogenizing board is installed in the frame, the dedicated light tubes and the light sensors are evenly mounted on the light homogenizing board, the light homogenizing board is divided into multiple units, a lightshielding board is arranged on each unit, each light shielding board, the dedicated light tubes and the light sensors are connected to the controller, and the controller compares the light level information transmitted by the light sensors with a preset value and then automatically adjusts the number of the light shielding boards and the dedicated light tubes to be turned on. In this way, the light homogenizing unit can automatically realize the best light supplement effect according to the actual situation to remove the shadow of a part placed on the part measurement platform and improve theaccuracy of measuring the object to be measured. The method has direct and eye-catching measurement results and a low misjudgment rate.

The invention relates to a tool for measuring the diameter at breast height of a tree. The tool for measuring the diameter at breast height of the tree comprises three or more measuring edges, whereinthe plurality of measuring edges are sequentially connected end to end to form a linear structure, the measuring edges are hinged, the measuring edges can rotate around hinge points, the adjacent measuring edges can rotate to form an included angle of any size, one measuring edge is of a fixed length and the other measuring edges are of a telescopic structure, and the length can be adjusted. Thetool is simple to operate and high in measurement precision, and can be used for scientific research on forest resources, forest growth and the like; the tree diameter at breast height is calculated in a mode of forming a triangle or a polygon in a plane through the measuring edges and calculating the inner diameter, and compared with a diameter-at-breast-height ruler, the measuring edges are moreeasily kept in the same plane, so that errors are reduced, and the measuring precision is improved.

The invention discloses a large-field-of-view image space telecentric conoscopic optical system for industrial chromaticity and brightness detection, and the system consists of a front lens group and a rear lens group, and a sixth spherical lens is disposed between the front lens group and the rear lens group. The front group of lenses comprises a first spherical lens, a second spherical lens, a third spherical lens, a fourth spherical lens and a fifth glued spherical lens; and the rear group of lenses comprises a seventh spherical lens, an eighth spherical lens, a ninth spherical lens, a tenth spherical lens, an eleventh spherical lens, a twelfth cemented spherical lens, a thirteenth spherical lens, a fourteenth spherical lens and an image surface. The device and the method have the beneficial effects that visual angle performance measurement data of a display can be quickly and accurately acquired in real time, the chromaticity, brightness and contrast of multi-angle light source distribution under a large visual angle are measured, visual angle data of a complete cone is acquired through single measurement, an accurate measurement result is quickly provided, and the measurement accuracy is improved. And the system can become a choice for various research and development projects and online production quality control applications.

There is a sort of planar sensor which is used for measuring positional gesture, it consists of the setting seat, the connecting rode and the coder which is used for measuring angle. Thereinto the left setting seat fixes in the fixed position, right setting seat fixes in the measured object, there have the left connecting rode, the right rode and three revolution assistants in series between the left setting seat and the right setting seat, the coder is fitted in each revolution assistant. This invention can checks the three freedom positional gesture of the object which is in the plane in the method of high-precision, real time and rapid.

The invention discloses a frequency-sweeping inter-modulation distortion testing system and method, and belongs to the technical field of the testing. The system comprises an inter-modulation distortion parameter analysis unit, an inter-modulation distortion scanning control unit, an inter-modulation distortion data processing unit and an inter-modulation distortion calibration unit. The inventionprovides a fast multi-source frequency-sweeping inter-modulation distortion testing method. The method comprises the following steps: integrating an inter-modulation parameter receiver frequency-sweeping range, acquiring a testing result satisfying a condition parameter when the scanning processing range meets a parameter operation demand; integrating network instrument scanning control accordingto the parameter when a user measures multiple inter-modulation parameters, thereby enabling the user to fast acquire a measurement result; and acquiring an accurate inter-modulation power output andreceiver measurement result by using the source of a vector network analyzer and receiver calibration and SOLT calibration method, wherein the measurement accuracy degree of the inter-modulation distortion parameter is improved.

The invention discloses an absolute grating scale and a measuring method based on a CMOS image sensor, the absolute grating scale comprises a grating scale main body, an optical amplification system, a CMOS image sensor, a signal processing module and a master control module, a measurement code track and a subdivision code track are arranged on the grating scale main body, the optical amplification system is used for collecting light rays reflected or transmitted through the measurement code track and the subdivision code track, the light rays converge and are incident on the CMOS image sensor, the CMOS image sensor is used for collecting the reached light signal to obtain an analog image of the present measuring position and transmitting the analog image to the signal processing module, the signal processing module is used for converting the analog image into a digital image and transmitting the digital image to the master control module, and the master control module is used for processing the digital image to separately obtain a rough measurement position value and a subdivision position value and combining the position values to obtain an absolute position measured value. According to the invention, the measurement accuracy is high, the measurement resolution is greatly improved, and the grating scale and the method can be widely applied in grating measurement industry.

The invention discloses a measuring method based on a nano metal hole array. The method comprises the following steps: step 1, impressing a series of periodically uniformly distributed nano metal holes on a metal film by using a nanoimprint lithography; step 2, selecting a suitable nano metal hole array structure, wherein the thickness of the metal film is 500nm; step 3, adopting vertical incidentlight to irradiate, causing a surface plasmon effect of the nano metal holes, and limiting the incident light into the nano metal holes, thereby locally enhancing the electric field intensity in thenano metal holes; step 3, quantitatively analyzing the change of the plasmon resonance wavelength through a spectrometer; step 4, measuring the volume of liquid in the nano metal holes through a corresponding relationship between the liquid volume and a spectral line of a reflection spectrum; and step 5, quantitatively analyzing a measurement effect by adopting a quality factor. The measuring method based on nano metal hole array provided by the invention has the characteristics of being non-destructive, non-invasive and non-marked and the like.

The invention provides an on-line measuring device for length of bar steel to be finished. The on-line measuring device comprises a storage rack, a first distance measuring sensor and a second distance measuring sensor; the storage rack is provided with a positioning groove for adjusting the length direction of the bar steel; the first distance measuring sensor and the second distance measuring sensor are oppositely arranged at the two ends of the positioning groove, and the first distance measuring sensor, the first end of the strip steel in the positioning groove, the second distance measuring sensor and the second end of the strip steel in the positioning groove are located on the same straight line. The first distance measuring sensor is used for measuring the distance to the first end of the bar steel, and the second distance measuring sensor is used for measuring the distance to the second end of the bar steel; the first distance measuring sensor and the second distance measuring sensor are both connected to a controller, and a man-machine interaction device is arranged on the controller; the length direction of the bar steep is adjusted through the positioning groove in the storage rack of a shot blasting machine and / or a sharpening machine, the distance between the distance measuring sensors and the corresponding ends of the bar steel is obtained in cooperation with the two distance measuring sensors, the length of the bar steel is obtained, the measuring cost is low, and the measuring result is rapid and accurate.

The invention discloses a sheet metal visual detection and acquisition terminal and method, comprising a visual capture unit, a part measurement platform and a dodging unit; the dodging unit includes a time delay board, a controller, a photosensitive sensor, a computer control switch, a frame, and a dodging board And the special lamp tube, the dodging plate is installed in the frame, and many special lamps and photosensitive sensors are evenly installed on the dodging board. The dodging board is divided into multiple units, and each unit is equipped with a shading plate 1. Multiple special lamps and multiple photosensitive sensors are connected to the controller. The controller compares the light brightness information transmitted by the photosensitive sensors with the preset value, and then automatically adjusts the number of open shading panels and special lamps. Through the above principles, the invention can automatically achieve the best supplementary light effect according to the actual situation, so that the shadow of the part placed on the part detection platform disappears, and the measurement accuracy of the object to be measured is improved. The measurement result of this method is intuitive, eye-catching and clear. The false positive rate is low.