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40results about How to "Simple processing circuit" patented technology

Laser phase ranging module

The present invention relates to a laser ranging technology and provides a laser phase ranging module. The laser phase ranging module includes a laser emitting assembly, an echo receiving and pre-processing assembly, a local receiving and pre-processing assembly and an FPGA processor; the FPGA processor generates two clock frequencies f1 and f2 by using a phase-locked loop, and a square wave signal with a measurement ruler frequency fs is generated through frequency division based on the clock frequency f1, and the square wave signal is transmitted to the laser emitting assembly; the laser emitting assembly emits laser to a target; echoes reflected by the target are processed by the echo receiving and pre-processing assembly, and then, square waves A of which the frequency is fs can be outputted; the local receiving and pre-processing assembly partially leads in the emitted laser and performs the same pre-processing as the echo receiving and pre-processing assembly on the led-in laser, and then outputs square waves B; and the FPGA processor synchronously reads the square waves A and the square waves B through using the clock frequency f2 and calculates out the distance of the target through data processing. According to the laser phase ranging module, frequency mixing processing is not required, and one measurement ruler can be adopted to realize remote precise ranging. The laser phase ranging module is suitable for single-point ranging and multi-path simultaneous ranging equipment.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Sample feeding system, anticollision device and anti-collision method

The present invention discloses a sampling system anti-collision device and an anti-collision method. The sampling system comprises a moving mechanism, a motor and so on. The anti-collision device comprises a code wheel, an optical coupling, a position signal detecting unit, a drive pulse counting unit and a drive pulse delivery unit. Wherein, the code wheel or the optical coupling is connected with the moving mechanism. The code wheel is provided with uniformly-spaced transparent slits. The optical coupling detects the transparent slit on the code wheel while moving relatively and outputs a detecting signal with periodical level variation. In addition, the position signal detecting unit determines whether a position signal is output to the drive pulse counting unit. The drive pulse counting unit judges whether the sampling system undergoes collision according to the position signal. Moreover, the present invention discloses a sampling system comprising the anti-collision device. The present invention can effectively detect collision state of the sampling system, make immediate response, stop sampling system operation, ensure personal safety and prevent instrument damages.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

Eddy current detecting device used for performing metal defect detection and eddy current probe thereof

The invention discloses an eddy current detecting device used for performing metal defect detection and an eddy current probe thereof. The eddy current probe comprises more than one orthogonal combination probe, wherein each orthogonal combination probe comprises one exciting coil and two induction coils, the geometric centers of the two induction coils are overlapped, the central cross sections of the two induction coils pass by the geometric center of the exciting coil, and the central cross sections of the exciting coil and the two induction coils are pairwise vertical. If more than two orthogonal combination probes are arranged, the central cross sections of the exciting coils of all the orthogonal combination probes are located on the same plane, and the geometric centers of all exciting coils are located on the same straight line. The eddy current detecting device comprises a controller, a signal generating circuit, a wave filtering and amplifying circuit, a phase-sensitive wave detecting circuit, a signal collecting card, a host computer, a first high-speed analogue switch, a second high-speed analogue switch and the eddy current probe. According to the eddy current detecting device and the eddy current, the detection sensitivity is high and the detection speed is fast.
Owner:ZHEJIANG UNIV

Differential-capacitive length sensor

The invention discloses a differential-capacitive length sensor which adopts a differential-capacitive technology and has the accuracy of higher than 0.1mum. The device comprises a capacitor fixing polar plate, a capacitor movable polar plate, a capacitor polar plate seat, a measuring rod and a spring device. The capacitor fixing polar plate is a cylinder which is separated by two rubber bands; two ends of the capacitor fixing polar plate are respectively connected with a capacitor polar plate seat by the rubber bands; the capacitor movable polar plate is arranged in the cylinder of the capacitor fixing polar plate; the capacitor movable polar plate is a cylinder, the outer radius of which is slightly less than the inner radius of the capacitor fixing polar plate and which can move horizontally in the cylinder of the capacitor fixing polar plate; the capacitor movable polar plate is connected with the measuring rod; and the spring device which is used for controlling the measuring rod to horizontally move is arranged outside the capacitor polar plate seat. As the traditional grating moire fringe technology is not used in the invention, the laser reticle and the processing reforming of moire fringes are not needed, the production and manufacturing cost is greatly reduced, and a backend processing circuit is relatively simple.
Owner:张华建

Fmcw automotive radar incorporating modified slow time processing of fine range doppler data

A novel and useful system and method by which radar angle and range resolution are significantly improved without increasing complexity in critical hardware parts. A multi-pulse methodology is described in which each pulse contains partial angular and range information consisting of a portion of the total CPI bandwidth, termed multiband chirp. Each chirp has significantly reduced fractional bandwidth relative to monoband processing. Each chirp contains angular information that fills only a portion of the 'virtual array', while the full virtual array information is contained across the CPI. This is done using only a single transmission antenna per pulse, thus significantly simplifying MIMO hardware realization, referred to as antenna-multiplexing (AM). Techniques for generating the multiband chirps as well as receiving and generating improved fine range-Doppler data maps. A windowing technique deployed in the transmitter as opposed to the receiver is also disclosed.
Owner:ARBE ROBOTICS LTD

Time-grating angular displacement sensor based on quadrature modulation of light intensity

The invention discloses a time-grating angular displacement sensor based on quadrature modulation of light intensity. The time-grating angular displacement sensor comprises a light-emitting element, a movable disc matrix, a fixed disc matrix and a photoelectric detector, wherein the light-emitting element is formed by circumferentially arranging a first power source body, a second power source body, a third power source body and a fourth power source body which have the same size and are driven by sine excitation signals with the same frequency and the same amplitude and the phase difference of 90 degrees respectively; a circle of fan ring-shaped movable disc light transmission surface is arranged on the movable disc matrix; a first group, a second group, a third group and a fourth group of fixed disc light transmission surfaces are circumferentially arranged on the fixed disc matrix; the spatial phases of the fixed disc light transmission surfaces correspond to the illumination regions of the four power source bodies; all groups of the fixed disc light transmission surfaces should meet a certain corresponding relationship with the movable disc light transmission surface; the photoelectric detector comprises a detection head matrix, and photoelectric detection heads which are fixed on the detection head matrix and can receive light fluxes of the four groups of the fixed disc light transmission surfaces at the same time. The time-grating angular displacement sensor can precisely measure an angular displacement, and can reduce the circuit control difficulty, the mounting difficulty and the machining process difficulty.
Owner:CHONGQING UNIV OF TECH

Laser position judging system and method

The present invention provides a kind of laser position judging system and method for judging laser irradiation position. The system includes a photosensitive unit with photodiode to convert received laser beam into electric signal; a signal amplifier unit to amplify electric signal; a signal rectifying unit to convert the rectified signal into positive output signal; a voltage comparison unit with one input end connected to the output of the signal rectifying unit and one other reference voltage input end; and a judging response unit including a responder to the output signal of the voltage comparison unit. When the output signal of the voltage comparison unit is high level, the responder responses to represent sensed laser and two sensing points are found out successively to find the connection line as the horizontal laser position. The present invention completes laser position judgment with photodiodes and simple circuit, and is simple, feasible, low in cost and high in precision.
Owner:ASIA OPTICAL CO INC

Method for conducting frequency domain information extending on data symbols in power line carrier communication

The invention discloses a method for conducting frequency domain information extending on data symbols in power line carrier communication. When the data symbols are generated in the power line carrier communication, multi-frequency domain information diversity extension is utilized to replace original ROBO extension, the diversity extension is irrelevant to time-varying features of a channel, and is only relevant to the features of the channel, and the diversity extension is completed in one symbol, which is beneficial to simplifying processing circuits of frequency domains, and meanwhile improving of communication reliability.
Owner:WU QI TECH INC

Planar microwave cavity drip-in type liquid dielectric substance value detection sensor

ActiveCN110501355ASimple processing circuitThe back-end processing circuit is simpleMaterial analysis using microwave meansPhysicsLiquid dielectric
The invention belongs to the technical field of microwave sensing and relates to a planar microwave cavity drip-in type liquid dielectric substance value detection sensor. A square OCSRR of the detection sensor is fixed on the top surface of a single-sided FR4 substrate; a rectangular detection area exists at the top of the square OCSRR; the rectangular detection area is of a rectangular structure; two output ends of the square OCSRR are connected with two input ends in the rectangular detection area; a three-sided metal rectangular frame is arranged outside the rectangular structure; two endsof the metal rectangular frame are suspended; two metal wires in the rectangular detection area are located in the metal frame; one end of each of the two metal wires is suspended; the metal wires are arranged in the metal frame so as to form a rectangular double-loop form; the two metal wires are parallel to each other; and the direction of the inner metal wire is opposite to that of the external metal wire. According to the invention, a drip-in mode is adopted; a to-be-detected liquid is directly dripped to a sensing area; a high-precision micro-channel does not need to be additionally manufactured; the sensing end is suitable for mass production; and a back-end processing circuit is simple.
Owner:DALIAN UNIV OF TECH

Liquid level sensor

The invention discloses a liquid level sensor and uses the Hall effect principle. A rotor firmly connected with a floater component winds back to a rotating shaft and rotates when the liquid level changes, thus causing the change of peripheral magnetic field. As the magnetic field applied on a Hall device changes, the change of an output signal is realized. The specific spatial layout of the rotor, stator soft iron and the Hall device forms a specific magnetic circuit, thus leading the rotation angle of the rotor to form linear relation with the intensity of the magnetic field and the intensity of the magnetic field to form linear relation with the output voltage of the Hall device. Consequently, the linearity between the rotation angle of the rotor and the voltage signal output of the whole liquid level sensor is realized. The liquid level sensor has long service life and the output signal can be directly used by a vehicle instrument.
Owner:UNITED AUTOMOTIVE ELECTRONICS SYST

Sample-loading system and Anti-collision device and Anti-collision method thereof

ActiveUS20080122396A1Low cost designEffectively prevent the sample-loading system from colliding with other objectsProgramme-controlled manipulatorComputer controlEngineeringOptical coupler
Some embodiments of the present invention provide an anti-collision device used for a sample-loading system. This device may include a code plate, an optical coupler, a location signal-detecting unit, a drive pulse counting unit and a drive pulse-sending unit. The optical coupler detects the code plate during the relative movement between the optical coupler and the code plate and outputs detection signals. The location signal detecting unit determines whether to output location signals to the drive pulse counting unit. The drive pulse counting unit judges whether collisions occur to the sample-loading system. Some embodiments of the present invention provide an anti-collision method and a sample-loading system comprising the anti-collision device.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

Force balance type transmitter of strain type displacement detecting element

The invention relates to a force balance type transmitter of a strain type displacement detecting element, belonging to the technical field of automatic detection. At present, during the detection process of flow rate and liquid level, the widely used displacement detecting element of the force balance type transmitter is inductance output, thus the circuit of the transmitter is more complex, and the adjustment is more troublesome. According to the invention, the strain type displacement detecting element is used for the force balance type transmitter, and the displacement detecting element is resistance output, the circuit of the transmitter is more simple, the adjustment is easier, the whole structure of the transmitter is a negative feedback closed-loop system, and is composed of a lever system, a displacement detecting amplifier of a forward channel and an electromagnetic feedback device of a feedback channel; and when the amplification factor of the displacement detecting amplifier of the forward channel is greater enough, the whole property of the transmitter depends on the lever system with more stable link property and the electromagnetic feedback device of the feedback channel, and has nothing relationship with the stability of the displacement detecting amplifier, thus the cost performance of the force balance type transmitter of the strain type displacement detecting element is relatively higher.
Owner:王可崇

Portable forward photoacoustic microscope based on optical resolution

The invention provides a portable forward photoacoustic microscopy based on optical resolution. The photoacoustic microscopy comprises a laser diode, a collimating lens, a focusing lens, protective glasses, a shell, a stage, an ultrasonic coupling liquid, an ultrasonic sensor, a lifting platform, a 3D motorized translation stage, a motor driving circuit, a computer, a data acquisition circuit, a signal pretreatment circuit, a clock circuit and a driving power circuit. According to the invention, miniature, inexpensive and easily maintained laser diode is applied to the field of optical resolution photoacoustic microscopy excitation. The portable forward photoacoustic microscope has the advantages of portable volume, high resolution, large imaging depth and simple signal post-treatment circuit, and is quite suitable for nondestructive testing of thin materials or tissue samples.
Owner:曾吕明

Auto black expansion method and apparatus for an image sensor

Auto black expansion circuitry with a simplified digital control system. According to the system, a count of the number of pixels that fall below desired black level and mid-level ranges are maintained. The pixel counts are obtained by comparators that receive the adjusted signals at one input and the desired comparator signal levels at the other input. At the end of a field, when the pixel counts are complete, adjustment to the auto black expansion may be made for the following field. Once the pixel count at the end of a given field indicates that the auto black expansion has achieved the desired level, the automatic gain control may be adjusted for the following field. The method uses single comparators and single counters to obtain the pixel counts. The digital controller outputs an 8-bit control signal to adjust the analog auto black expansion and automatic gain control circuits to precise levels.
Owner:OMNIVISION TECH INC

One-circle double-pulse revolution cycle number counting method for airburst fuse

The invention provides a one-circle double-pulse revolution cycle number counting method for an airburst fuse. A revolution cycle number counting circuit adopted for the one-circle double-pulse revolution cycle number counting method is arranged in a bullet. The revolution cycle number counting circuit comprises a magnetic electron chip, an operational amplifier and a waveform conversion module. The waveform conversion module comprises a comparator A, a comparator B, a resistor R11, a resistor R13, a resistor R14, an isolation resistor R12, a diode D1 and a diode D2. The operational amplifier is used for receiving sinusoidal signals transmitted by the magnetic electron chip in the bullet, amplifying the sinusoidal signals and transmitting the amplified sinusoidal signals to the waveform conversion module. The waveform conversion module converts sinusoidal waves amplified by the operational amplifier into square waves. The revolution cycle number counting module is used for counting the number of square waves output by the waveform conversion module, and therefore the revolution cycle number of the bullet is obtained. The output voltage of the magnetic electron chip is high, and therefore the region adaptability of a weapon is greatly improved. The two comparators of the waveform conversion module compose a window comparator, and therefore each sinusoidal wave can be converted into two of the square waves.
Owner:710TH RES INST OF CHINA SHIPBUILDING IND CORP

Sample-loading system and anti-collision device and anti-collision method thereof

ActiveUS7423404B2Effectively prevent the sample-loading system from colliding with other objectsLow cost designProgramme-controlled manipulatorComputer controlEngineeringRelative motion
Some embodiments of the present invention provide an anti-collision device used for a sample-loading system. This device may include a code plate, an optical coupler, a location signal-detecting unit, a drive pulse counting unit and a drive pulse-sending unit. The optical coupler detects the code plate during the relative movement between the optical coupler and the code plate and outputs detection signals. The location signal detecting unit determines whether to output location signals to the drive pulse counting unit. The drive pulse counting unit judges whether collisions occur to the sample-loading system. Some embodiments of the present invention provide an anti-collision method and a sample-loading system comprising the anti-collision device.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

Oil collector

This is oil collector used of the testing platform of injection pump. On this oil collector is installed oil injection sensor. This sensor is not only to ensure every oil cylinder is whether not inject oil but also can to survey every oil cylinder injective moment (or phase angle), then to calculate dynamic injective phase angle. As only to differentiate in the collector is whether not injection, so the sensor's linear degree can be lower, and its construction is simple. The output signals of this sensor are switched signals using to show the injection or not injection, so its resist disturbed ability is strong.
Owner:HENAN UNIV OF SCI & TECH

An electrical control system for laser tracking measurement

The invention discloses an electrical control system for laser tracking measurement. The system comprises a first circuit breaker, a relay, a servo motor control module, a PMAC control module, a horizontal limiting switch, a vertical limiting switch, a hand wheel, a photoelectric position sensor module, namely, a PSD module, a direct current power supply module and a second circuit breaker; duringthe measuring process of a laser tracking system, the voltage generated when the the position of a light spot on PSD changes enters into a PMAC control card, received voltage variation is converted into a control signal by the PMAC control card and transmitted to a servo motor driving device, so that tracking is conducted on the light spot by driving a servo motor to complete tracking measurement. During the tracking process, if the servo motor exceeds the operating range in a certain direction, a signal is transmitted to the PMAC control module by the limiting switch in the direction, and the servo motor driving device is controlled by the PMAC control module to stop the operation of the servo motor to prevent the damage of the laser tracking system. By means of the electrical control system, closed loop control of the servo motor is achieved to ensure the normal measuring of the laser tracking system.
Owner:BEIJING ABLEWAY TECH CO LTD

Real-time portable forward photoacoustic microscope

The invention provides a portable forward photoacoustic microscope based on optical resolution. The photoacoustic microscope comprises a laser diode, a collimating lens, a focusing lens, protective glasses, a shell, an objective table, an ultrasonic coupling liquid, an ultrasonic sensor, a lifting platform, a 3D motorized translation stage, a motor drive circuit, a computer, a data acquisition circuit, a signal pre-treatment circuit, a clock circuit and a driving power circuit. According to the invention, miniature, inexpensive and easily maintained laser diode is applied to the field of optical resolution photoacoustic microscopy excitation. The portable forward photoacoustic microscope has the advantages of portable volume, high resolution, large imaging depth and simple signal post-treatment circuit, and is quite suitable for nondestructive testing of thin materials or tissue samples.
Owner:曾吕明

A laser phase ranging module

The invention relates to laser ranging technology, and provides a laser phase ranging module, including a laser emitting component, an echo receiving and preprocessing component, a local receiving and preprocessing component, and an FPGA processor; the FPGA processor uses a phase-locked loop to generate two Two clock frequencies f1 and f2 are divided by the clock frequency f1 to generate a square wave signal with a measuring ruler frequency fs and send it to the laser emitting component; the laser emitting component emits laser light to the target; the echo reflected by the target is received and preprocessed After processing, the component outputs a square wave A with a frequency of fs; the local receiving and preprocessing component imports the emitted laser part, and performs the same preprocessing on the imported laser as the echo receiving and preprocessing component to output square wave B; the FPGA processor uses a clock The frequency f2 reads the two square waves A and B synchronously, and calculates the target distance through data processing. The invention does not need frequency mixing processing, can realize long-distance precision distance measurement by using a measuring ruler, and is suitable for single-point distance measurement and multi-channel simultaneous distance measurement equipment.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

A linear displacement measuring device

The invention discloses a linear displacement measuring device. The emitting surface of the light generating part and the receiving surface of the light imaging part are in the same plane, and the measuring part has at least a gap with respect to the plane where the emitting surface of the light generating part and the receiving surface of the light imaging part are located. The angle is a preset surface with a preset angle, and the measuring part can be displaced along the direction in which the light generating part and the light imaging part are arranged; the light generating part is used to emit light to the preset surface of the measuring part, and the first converging part is used to collect The light reflected back by the preset surface of the part and converges the light to the light imaging part, and the light imaging part is used to receive the light and form an image; Calculate the displacement of the measuring part based on the distance from the central axis of the part, the focal length of the first converging part and the distance from the central axis of the light imaging part to the central axis of the light generating part. Compared with the prior art, the linear displacement measuring device has simpler manufacturing process, lower production cost, and simpler processing circuit.
Owner:GUANGDONG UNIV OF TECH

Ultrasonic motor locating device

The invention relates to an ultrasound wave motor positioning apparatus, which comprises magnetic coder as sensor, receiving processor and ultrasound motor. The magnetic coder comprises positioning disk and magnetic tape that are distributed on the positioning disk. The receiving processor comprises Hell piece and driving processing circuit. The Hell piece is embedded in the ultrasound motor shell, the magnetic coder is fixed on the ultrasound motor axial and parallel with the Hell piece and leaves space. The invention discloses a multi-layer film structure surface acoustic wave device with LiNbO3 / ZnO / diamond multi-layer film structure and method for making same. The multi-layer film structure surface acoustic wave devices comprises CVD diamond film, LiNbO3 film and nanometer ZnO middle layer with high C axial preferred orientation between the CVD diamond film and LiNbO3 film. The inventive method comprises steps of: sputtering nanometer ZnO film with high C axial preferred orientation on the surface of CVD diamond film; sputtering LiNbO3 film of high C axial preferred orientation on the surface of ZnO film. The invention has the advantages of getting good LiNbO3 nanometer of high C axial preferred orientation..
Owner:SICHUAN CLIMB ELEVATOR

Force balance type transmitter of strain type displacement detecting element

The invention relates to a force balance type transmitter of a strain type displacement detecting element, belonging to the technical field of automatic detection. At present, during the detection process of flow rate and liquid level, the widely used displacement detecting element of the force balance type transmitter is inductance output, thus the circuit of the transmitter is more complex, andthe adjustment is more troublesome. According to the invention, the strain type displacement detecting element is used for the force balance type transmitter, and the displacement detecting element is resistance output, the circuit of the transmitter is more simple, the adjustment is easier, the whole structure of the transmitter is a negative feedback closed-loop system, and is composed of a lever system, a displacement detecting amplifier of a forward channel and an electromagnetic feedback device of a feedback channel; and when the amplification factor of the displacement detecting amplifier of the forward channel is greater enough, the whole property of the transmitter depends on the lever system with more stable link property and the electromagnetic feedback device of the feedback channel, and has nothing relationship with the stability of the displacement detecting amplifier, thus the cost performance of the force balance type transmitter of the strain type displacement detecting element is relatively higher.
Owner:王可崇

High-capacity common-mode inductor processing circuit for network signal

A high-capacity common-mode inductor processing circuit for network signal is disclosed. Each of high-capacity common-mode inductors is disposed between two adjacent circuit channels to perform signal coupling, and each high-capacity common-mode inductor has parasitic capacitance between primary and secondary sides thereof, each of autotransformers is disposed on a side of corresponding one of the high-capacity common-mode inductors, and center tap lines of the autotransformers are grounded. The high-capacity common-mode inductor includes an iron core post and an iron core cover, the iron core post includes a winding part to be wound by conductive wires, and the conductive wires are wound on the winding part by a preset number of turns, and upwardly stacked and wound on the winding part by a preset layer number. The high-capacity common-mode inductors and the parasitic capacitances can eliminate noise on the circuit channels and perform signal coupling.
Owner:AJOHO ENTERPRISE
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