38results about How to "Adjustable magnification" patented technology

The invention discloses a detection and amplification device for micro current, comprising a sampling circuit, an MCU (Micro Control Unit) control circuit and an amplification circuit, wherein the MCU control circuit controls sampling voltage; the amplification circuit amplifies the sampling voltage output by the sampling circuit; a filtering amplitude limiting circuit is connected between the sampling circuit and the amplification circuit; the amplification circuit comprises a first amplification circuit and a second amplification circuit; the filtering amplitude limiting circuit comprises afirst filtering amplitude limiting circuit and a second filtering amplitude limiting circuit; the MCU control circuit controls the first path of sampling voltage output by the sampling circuit to be filtered by the first filtering amplitude limiting circuit, and the first path of sampling voltage is input into a first path of amplification circuit for amplifying; and the MCU control circuit controls the second path of sampling voltage output by the sampling circuit to be filtered by the second filtering amplitude limiting circuit, and then, the second path of sampling voltage is input to the second amplification circuit for amplifying. The detection and amplification device has the advantages of accurate sampling, adjustable amplification multiple, simple circuit, reasonable design, strong practicality, simplified use and operation and strong anti-interference performance, and is simple and easy to realize.

This invention relates to a micro-shift unit driven by a magnetostrictive material including: a tube, a lever structure, a driving disc, a lower spacing ring, an excitation coil, a magnetostrictive rod, an upper spacing disc, bolts, an output pole, a base and a reset spring, in which, an amplifying unit of 1-3 level is set between the magnetostrictive rod and the output pole composed of lever components and a driving disk, which selects combination of single level or multi-level amplifying unit and different amplifying multiples of single level lever to adjust the amplifying multiple of the micro-shift unit.

The invention provides an earthquake forecasting instrument which comprises a base, a coil, an alternating current amplifier, a current-limiting gate and an alarm device, wherein the coil is vertically arranged above the base; the coil, the alternating current amplifier, the current-limiting gate and the alarm device are sequentially connected; an amplification factor of the alternating current amplifier can be adjusted; the alternating current amplifier is provided with discontinuous gears; and the current-limiting gate is structurally characterized in that the current-limiting gate is conducted when an input voltage is larger than a rated voltage and is cutoff when the input voltage is less than the rated voltage. The earthquake forecasting instrument can monitor earth magnetism abnormal fluctuation in the early stage of earthquakes, has simple structure and low cost, is free from environmental influence and is convenient for a person to carry and use.

The invention provides a chip mounter suction nozzle inspection device. The chip mounter suction nozzle inspection device comprises a body frame, a rotary platform device, an electrical control device, a high-definition image shooting device, an integrated computer, a vacuum detection device, an air inlet valve and a wiring control device, wherein a push-pull type cover plate is arranged between an upper interlayer and a middle interlayer of the body frame, and the integrated computer and the high-definition image shooting device are mounted on the upper interlayer; the middle interlayer is divided into a front part and a rear part by a partition plate, and the rotary platform device and the electrical control device are mounted on the front part and the rear part of the middle interlayerrespectively; the vacuum detection device is mounted below a rotary platform; the air inlet valve and the wiring control device are fixedly mounted on a side plate of a lower interlayer through screws. The chip mounter suction nozzle inspection device adopts a frame structure, is easy to control, convenient to take and place, stable in operation and high in precision, can clearly display the surface condition of a suction nozzle opening, detects the condition of a through hole in a suction nozzle, and can achieve vacuum degree detection on the suction nozzle.

A CT imaging device disclosed by the present invention comprises a shielding cabinet, a multi-axis motion platform, a ray source assembly, a detection assembly, a loading platform and an X-ray shielding plate, the multi-axis motion platform, the ray source assembly, the detection assembly, the loading platform and the X-ray shielding plate are all located in the shielding cabinet, and the multi-axis motion platform comprises a base. The radiation source assembly and the detection assembly are arranged on the base in a sliding mode in the length direction of the to-be-detected piece, the radiation source assembly comprises a plurality of radiation sources, and the detection assembly comprises a plurality of detectors. According to the invention, the object carrying platform is used for rotatably fixing the to-be-detected piece and is matched with the ray source assembly and the detection assembly to synchronously move along the length direction of the to-be-detected piece, so that semi-circumferential or whole-circumferential equal scanning detection of different faults of the to-be-detected piece can be met, and the measurement precision is improved.

The invention relates to a training simulation device of a neuroendoscopy, which is characterized by comprising a camera and a USB connecting wire with a USB interface; the camera is connected to a DSP integrated board and positioned in the central position of the DSP integrated board; the DSP integrated board is also connected with a plurality of light emitting diodes; the DSP integrated board is fixedly arranged at the front end of an insulated hollow strut rod; a connecting wire electrically connected with the DSP integrated board passes through the inside of the strut bar; the other end of the connecting wire is connected with the USB connecting wire; the USB connecting wire is fixed in a handle at the rear end of the strut rod and positioned outside the strut rod; the position on the strut rod close to the handle of the rear end is provided with a switch; and the switch is electrically connected with the connecting wire of the strut rod. The training simulation device has stable and reliable imaging, is provided with a light source, fits practical operation, is suitable for new trainees to preliminarily know the neuroendoscopy, can adjust magnification times, is close to the operation of a real endoscope, is provided with the USB connector which can be in seamless connection with a home computer for training simulation at any moment and any place, has low manufacturing cost and can be replenished in time after being damaged.

The invention relates to an apparatus used for fabrication of a single-sided printed circuit board. The apparatus comprises a UV-light generating device and is characterized in that UV light emitted by the UV-light generating device is reflected by a first reflector and irradiates on a dodging system, after passing through a first field lens, a second field lens and a second reflector, uniform light spots formed by the dodging system irradiate on a photographic film on which an original pattern needing exposure is drawn, the original pattern on the photographic film is m times smaller than a pattern which actually forms on the printed circuit board, wherein m is more than 1, and the photographic film, as an object plane of an optical amplification system, forms an image on the printed circuit board to be exposed after the photographic film is amplified by the optical amplification system. The invention has the following advantages: a manner of multiplying-imaging of non-parallel light is employed; compared to conventional exposure machines, the apparatus provided in the invention enables utilization of a large-aperture curved reflector to be avoided, equipment processing difficulty to be reduced, cost to be lowered down and the volume of equipment to be reduced.

The invention provides a non-blind area magnetic field measuring device and method based on laser polarization modulation. The non-blind area magnetic field measuring device comprises a light path module, an atomic gas chamber, a temperature control module, a magnetic field control module and a signal analysis control module. The atom gas chamber is filled with alkali metal atoms as a working substance; the light path module is used for pumping and detecting alkali metal atoms in the atomic gas chamber; the temperature control module is used for stabilizing the temperature of the atomic gas chamber within a preset temperature range of + / -1 DEG C; the magnetic field control module is used for generating an alternating excitation magnetic field required by the atomic gas chamber; and the signal analysis control module is used for resolving to obtain to-be-measured magnetic field intensity and azimuth information. According to the invention, a vector magnetic field measurement blind area corresponding to tensor polarization single distribution is effectively eliminated.

The invention relates a method for detecting line insulation of a circuit board. According to the method, the insulating resistance of the circuit board is detected by adopting an insulating resistance testing circuit of the circuit board. The detection method comprises the following steps of: providing a compensating circuit which is connected with the compensating end of a front end circuit; and generating compensating voltage or current by using the compensating circuit to eliminate the error of output total voltage Uo of the front end circuit, wherein the error only refers to an error generated by the base current IB of a triode which is in a conducted state in a triode array flowing into a sampling resistor. According to the method, an amplifying circuit consists of multiple stages, and the amplifying time is adjustable and high; an error output quantity caused by the base current of the triode in the measuring circuit is compensated through the compensating circuit, and an error caused by the base current of the triode in the triode array is eliminated; and double-end differential mode input is adopted at the first stage of the amplifying circuit, and single-end output is adopted at the tail stage of the amplifying circuit, so that the amplifying circuit has the characteristics of high common-mode rejection capability, low null drift, high input impedance, low output impedance and the like.

The invention relates to an integrated laser damage surface observation system which is characterized in that after being illuminated by an LED light source, a sample damaged surface is amplified and imaged by a microscope objective, a tubular lens and a CCD camera on a coaxial system, and is displayed in a computer in real time for image processing. Reflection-type observation can be adopted for light-proof samples, transmission-type observation can be adopted for light-transmitting samples, and the microscope objective, the tubular lens and the CCD camera are integrated through the coaxial system, so that it is guaranteed that incident light rays are coaxial; the coaxial system can be moved for focusing, so that aberration can be effectively reduced, and a light path can be adjusted conveniently. The system is simple in device and structure, is in self-assembly design, has adjustable magnification times and low cost, can measure the damage degree from the surface fine structure change level, and can be applied to the technical fields of laser damage, laser damage and the like.

The invention provides an earthquake forecasting instrument which comprises a base, a coil, an alternating current amplifier, a current-limiting gate and an alarm device, wherein the coil is vertically arranged above the base; the coil, the alternating current amplifier, the current-limiting gate and the alarm device are sequentially connected; an amplification factor of the alternating current amplifier can be adjusted; the alternating current amplifier is provided with discontinuous gears; and the current-limiting gate is structurally characterized in that the current-limiting gate is conducted when an input voltage is larger than a rated voltage and is cutoff when the input voltage is less than the rated voltage. The earthquake forecasting instrument can monitor earth magnetism abnormal fluctuation in the early stage of earthquakes, has simple structure and low cost, is free from environmental influence and is convenient for a person to carry and use.

The invention discloses a spray head lifting locating method. The two opposite sides of a mounting rack are mounted on two lifting guide frames (1); spray heads are mounted on the mounting rack; a ball screw (2) is arranged on each lifting guide frame; the number of the lifting guide frames and the number of the ball screws are each two, and the two ball screws are mounted on the two lifting guideframes correspondingly; the two ends of the mounting rack are mounted on the two ball screws in a sleeved manner; when servo motors rotate, the mounting rack and the spray heads can be driven throughtransmission of the ball screws to ascend and descend; a tilt angle sensor used for detecting the tilt angle of the mounting rack is arranged on the mounting rack; the two ball screws are driven by the two independent servo motors (6) correspondingly; the tilt angle sensor is connected with an MCU; the servo motors are controlled by the MCU; and the MCU controls the height of the mounting rack and the height of the spray heads by controlling the servo motors, and lifting locating of the spray heads is achieved. According to the spray head lifting locating method, the locating precision is high, and implementation is easy.

The invention discloses a readout circuit of a current-type terahertz pyroelectric detector, which belongs to the field of terahertz detection and imaging. The readout circuit includes a current-voltage converter, a 50Hz trap circuit, a first-order low-pass filter amplifier circuit and a potential raising module. Among them, the signal output by the terahertz pyroelectric detector is input into the current-voltage converter, which is used to convert the current signal into a voltage signal; the signal output by the current-voltage converter is input into the 50Hz trap circuit, which is used to eliminate power frequency interference; The signal output by the 50Hz notch circuit is input into the first-order low-pass filter amplifier circuit for further signal amplification; the signal output by the first-order low-pass filter amplifier circuit is then input into the potential raising module, which is used to raise the voltage so that the voltage signal output by the circuit is consistent with the subsequent The terminal digital acquisition circuit needs to match the voltage. The voltage signal output by the readout circuit is pure, and is suitable for collecting and outputting the weak current of the terahertz pyroelectric detector.

The invention discloses a high-strength mining expansion filling fireproofing and extinguishing material and an application method thereof. The material comprises the following substances in parts by weight: 16-25 parts of aluminate cement clinker, 12-20 parts of Portland cement clinker, 4-16 parts of active calcic material, 6-15 parts of setting accelerator, 5-10 parts of quicklime, 22-40 parts of fly ash, 0.1-1 part of zinc powder foaming agent, 0.5-2 parts of thickening time control agent, 1-2 parts of aluminum hydroxide, 1-3 parts of dispersing agent and a proper amount of sodium hydroxide. By adding the sodium hydroxide, the pH value of the prepared slurry is 12-13. The material can obviously enhance the compression strength of the filled body, can enhance the critical fracture toughness and stability of the filled body, implements long-distance line delivery, and also implement quick filling and high-efficiency fireproofing and extinguishment.

The invention provides a bipolar PNP transistor and a manufacturing method thereof. The bipolar PNP transistor comprises a substrate, an epitaxial layer formed on the substrate, a deep phosphorus zone, a base zone, a collection zone and an emission zone which are formed in the epitaxial layer, a first interlayer dielectric layer and a voltage modulation dielectric layer which are formed on the epitaxial layer, a first interconnection line formed on the first interlayer dielectric layer and the voltage modulation dielectric layer, a second interlayer dielectric layer formed on the first interlayer dielectric layer and the first interconnection line, and a second interconnection line formed on the second interlayer dielectric layer, wherein the base zone is covered by the voltage modulation dielectric layer, and electric leading out is realized through the first interconnection line. According to the bipolar PNP transistor and the manufacturing method, through forming the voltage modulation dielectric layer on the base zone, the electric leading out of the voltage modulation dielectric layer is realized through the first interconnection line, so the charge concentration of a base zone surface is changed through changing the induction charge number of the voltage modulation dielectric layer, and thus the magnification times of small current is adjustable.

The invention discloses a detection and amplification device for micro current, comprising a sampling circuit, an MCU (Micro Control Unit) control circuit and an amplification circuit, wherein the MCU control circuit controls sampling voltage; the amplification circuit amplifies the sampling voltage output by the sampling circuit; a filtering amplitude limiting circuit is connected between the sampling circuit and the amplification circuit; the amplification circuit comprises a first amplification circuit and a second amplification circuit; the filtering amplitude limiting circuit comprises afirst filtering amplitude limiting circuit and a second filtering amplitude limiting circuit; the MCU control circuit controls the first path of sampling voltage output by the sampling circuit to be filtered by the first filtering amplitude limiting circuit, and the first path of sampling voltage is input into a first path of amplification circuit for amplifying; and the MCU control circuit controls the second path of sampling voltage output by the sampling circuit to be filtered by the second filtering amplitude limiting circuit, and then, the second path of sampling voltage is input to the second amplification circuit for amplifying. The detection and amplification device has the advantages of accurate sampling, adjustable amplification multiple, simple circuit, reasonable design, strong practicality, simplified use and operation and strong anti-interference performance, and is simple and easy to realize.