34results about How to "Small temperature drift" patented technology

The invention provides a silicon resonance pressure sensor. The silicon resonance pressure sensor comprises a pressure sensing layer, a resonance layer and a glass layer, one side, close to the resonance layer, of the pressure sensing layer is provided with a first pressure sensing groove, and two opposite sides in the first pressure sensing groove are respectively provided with a silicon island; the resonance layer comprises a cover plate, a mass block, an elastic piece, a resonance main beam, a resonance auxiliary beam, fixed comb teeth and movable comb teeth. The cover plate is arranged on the silicon island in a covering manner; the two ends of the mass block are connected with the two cover plates through elastic pieces respectively, a plurality of through holes are formed in the mass block, and the through holes form a honeycomb nest structure; the two ends of the resonance main beam are connected with the two cover plates respectively, the end, away from the resonance main beam, of the resonance auxiliary beam is connected with movable comb teeth, and the fixed comb teeth and the movable comb teeth are matched with each other to form an electrostatic comb tooth pair. One technical effect of the invention is that the temperature drift can be reduced, so that the accuracy of the measurement result of the silicon resonance pressure sensor is ensured.

According to the feedback control circuit, the control method and the switching power supply applying the feedback control circuit, a secondary side controller serves as a main controller, and a current generation and mirror image module and a control signal generation module are arranged in the secondary side controller; the current generation and mirroring module generates a first current based on the output voltage or the signal representing the output voltage and the first voltage signal, and mirrors the first current into a second current; the control signal generation module generates a control signal based on the second current; and the secondary side controller realizes feedback control of the loop based on the control signal. Through the arrangement, an optocoupler is not needed, the current mirror image module can be compatible with an existing peripheral circuit structure, the structure is simple, and the transmission delay of the current mirror image module is far smaller than that of the optocoupler, so that unnecessary poles can be reduced, and a corresponding compensation network structure can be simplified; and the current mirror image module has better current and temperature stability and smaller temperature excursion, so that the light attenuation effect of an optocoupler can be avoided, and the service life of the current mirror image module is longer.

The galvanometer motor with the constant-temperature control function comprises a motor body assembly and a constant-temperature control assembly, the motor body assembly comprises a motor shell, a motor stator and a motor rotating shaft which are sequentially arranged from outside to inside, and the constant-temperature control assembly comprises a temperature sensor, a middle-section thermostat, a tail-section thermostat and a constant-temperature shell. The middle-section thermostat and the tail-section thermostat are vertically installed on the outer wall of the motor shell, the constant-temperature shell is arranged outside the middle-section thermostat and the tail-section thermostat, and the temperature sensor detects the temperature of the motor body assembly and feeds back the temperature to the middle-section thermostat and the tail-section thermostat. And the temperature of the motor body assembly is controlled through the middle-section thermostat and the tail-section thermostat. According to the invention, through effective temperature control, the temperature drift of the motor body assembly is reduced, and the starting and operation performance of the motor body assembly under the condition that the environment temperature is relatively low can be ensured.

The invention discloses a low-temperature drift silicon resonance accelerometer structure, which relates to the technical field of inertial navigation and comprises a middle layer, an upper glass cover plate and a lower glass cover plate, the upper-layer glass cover plate and the lower-layer glass cover plate respectively cover two sides of the outer frame of the middle layer and are bonded with the outer frame, so that the middle layer is packaged in vacuum; a supporting point of the resonator is designed at the geometric center of the middle layer of the accelerometer, a center anchor point, an amplification lever structure and the double-end fixed tuning fork type resonator are connected through a resonator center supporting beam, detection comb teeth are driven to measure resonant frequency influenced by inertia force, frequency signals are led out to the outside, and acceleration is represented; in the design of the invention, the measurement structure of the middle layer is fixed with the shell only through one supporting point, the influence of thermal stress on the performance of the accelerometer is obviously reduced, and the design enables the double-end fixed tuning fork type resonator to be close to a free thermal expansion state when the temperature of the accelerometer changes, so that the stable frequency response is kept.

The invention relates to a band-gap reference voltage circuit based on channel length modulation effect compensation. The circuit comprises a Zener voltage stabilization source module which is used for carrying out preliminary step-down on external input voltage to generate primary reference voltage; the linear voltage stabilization source module is coupled to the Zener voltage stabilization source module and is used for generating a linear voltage stabilization source; the first-order band-gap reference circuit module is coupled to the linear voltage stabilization source module and is used for generating a first current subjected to first-order temperature compensation; the lambda modulation effect high-order compensation circuit module is respectively coupled to the Zener voltage stabilization source module and the linear voltage stabilization source module, and the lambda modulation effect high-order compensation circuit module generates a second current with a high-order nonlinear temperature coefficient through a channel length modulation effect; and the starting circuit module is used for providing starting voltage and driving current in the power-on process of the band-gap reference voltage circuit. According to the invention, the reference voltage with an ultralow temperature coefficient can be realized.

The utility model provides a lens and a vehicle, and the lens comprises a lens barrel and a lens group which is disposed in the lens barrel. The lens group comprises a first lens and a second lens, the object side surface and / or the image side surface of the first lens are / is a concave surface near an optical axis, and the object side surface and the image side surface of the second lens are convex surfaces near the optical axis; the lens barrel comprises a first mounting part and a second mounting part, the outer side wall of the first lens abuts against the first mounting part, and the outer side wall of the second lens abuts against the second mounting part; the first installation part has a first thickness in the direction perpendicular to the optical axis, the second installation part has a second thickness in the direction perpendicular to the optical axis, and the first thickness is smaller than the second thickness. According to the utility model, through setting the wall thickness of the lens barrel, the radial force of the lens can be effectively reduced, the deformation of the optical effective part of the lens is reduced, the temperature drift is reduced, the stability of the lens is improved, and the product performance is improved.

The application relates to the field of semiconductor integrated circuit design and manufacturing, in particular to a Hall resistance network and a forming method thereof. The Hall resistance network at least comprises a first Hall element and a Hall compensation network, the first Hall element and the Hall compensation network are connected in series, the Hall compensation network is used for compensating temperature drift of the first Hall element in a constant voltage driving mode, and the Hall compensation network at least comprises a second Hall element. The direction of a resistance temperature coefficient of the second Hall element is opposite to the direction of a resistance temperature coefficient of the first Hall element, and the resistance values of the first Hall element and the second Hall element are not equal. The Hall resistance network has the advantages of low cost and simple manufacturing, can realize low temperature drift in the constant voltage driving mode without increasing additional circuit design, and can be applied to the field of high-precision sensing with low temperature drift.

The application provides a self-bias instrument input stage circuit based on a bipolar process, belonging to the technical field of instrument input circuits, wherein an input end of a bias current compensation circuit is connected with an output end of a mirror constant current source circuit, and an output end of the bias current compensation circuit is connected with an input stage circuit; an input end of the input stage circuit is connected with an external signal input end and the output end of the bias current compensation circuit, and the input end of the input stage amplifier circuit is also connected with a P-tube proportional current source and an N-tube proportional current source output by the mirror current source circuit. Through the improved design, the current flowing through the collection tube N2 and the current flowing through the target tube N1 are determined by the P-type current source, the VCE voltages of P2 and P10 tubes are controlled to be basically consistent, the influence of the base width modulation effect is reduced, the compensation accuracy is greatly ensured, the bias current required by the input stage from the outside is reduced, and the bias current temperature drift is reduced.

This application provides an analog front-end chip, an analog front-end circuit, and a signal processing device, including: a first operational amplifier module for amplitude adjustment of an electrical signal connected to a first input impedance network; and a second operational amplifier module for amplitude adjustment of an electrical signal connected to a second input impedance network. The second input impedance network has a different impedance than the first input impedance network. The first and second operational amplifier modules are integrated within the same chip. This solves the problem of parasitic capacitance and resistance sensitivity caused by external chip interconnections; avoids the influence of process deviations on the bandwidth of the signal transmission path; and easily achieves high bandwidth performance for the analog front-end circuit. Simultaneously, since all critical signal paths are within a single chip, the temperature characteristics are consistent, resulting in minimal system temperature drift.

The present invention discloses a pressure-temperature integrated sensor for new energy vehicles, including a sensor housing, an electrical connector, a sensitive element seat, a PCB circuit board, a pressure sensitive element, and a temperature sensitive element. The lower end of the sensor housing is integrally formed with a threaded pipe joint, and the sensitive element seat is installed in the inner cavity of the sensor housing. The upper end surface of the sensitive element seat is provided with a square cavity, two groups of symmetrically arranged support protrusions and two groups of symmetrically arranged buckles. The pressure sensitive element is installed in the square cavity, and the lower end of the sensitive element seat is provided with a boss, and the boss is provided with a support extending downward and extending from the lower end of the threaded pipe joint. The lower end of the support is provided with a blind hole, and the temperature sensitive element is installed in the blind hole; the lower end of the electrical connector is placed inside the sensor housing, and four PIN pins are vertically inserted on the internal end surface of the electrical connector, and the PCB circuit board is plugged into two groups of symmetrically opened U-shaped grooves on the outer side wall of the lower end of the electrical connector. The present invention can detect the pressure and temperature of liquid or gas, and has strong structural stability.

The application discloses a high-precision six-axis motion platform, which comprises a steel frame assembly, a stone material assembly, an XY-axis assembly, an AC-axis rotary table, a Z-axis assembly and a B-axis rotary table, the stone material assembly is installed on the steel frame assembly, the XY-axis assembly is installed on a base of the stone material assembly, the AC-axis rotary table is horizontally installed on a Y-axis load plate of the XY-axis assembly, the Z-axis assembly is vertically installed on a cross beam of the stone material assembly, and the B-axis rotary table is installed on a Z-axis load plate of the Z-axis assembly. The six-degree-of-freedom independent collaborative control is realized through the brand-new modular independent partition structure and the direct drive transmission-free scheme, the transmission gap and coupling error are eliminated from the mechanical root, the platform positioning precision, the dynamic response speed and the structural rigidity are simultaneously improved, the assembly and calibration process is simplified, the production and maintenance costs are reduced, and the high-precision operation of the semiconductor and optical detection fields is adapted to the harsh working conditions.

The invention discloses a fixed-focus optical system, which relates to the technical field of optics and is provided with an object side and an image side which are oppositely arranged along the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and a photosensitive chip which are sequentially arranged from the object side to the image side. The fixed-focus optical system is high in resolution, low in temperature drift, small in size, bright in picture and better in imaging effect.

The utility model discloses a current-limiting protection circuit of a continuous laser, which relates to the technical field of circuit design, and is characterized in that an MCU (Microprogrammed Control Unit) controls a digital-to-analog converter to generate a required current-limiting voltage value through an SPI (Serial Peripheral Interface) bus, the maximum value of the voltage value is external reference source voltage, the current-limiting voltage value and a driven sawtooth signal value generate square waves through a comparator, and the square waves are output through a comparator. And the square wave signal is used as a control signal of the analog switch. A direct current level generated by the DAC is coupled to a comparator through an isolation buffer and a laser driving signal; the analog switch is used for switching to output a driving signal or a current-limiting protection signal through the output state of the comparator; an additional direct-current signal generator is not needed, the structure is simple, and the cost is low; and meanwhile, the limiting voltage point of the current limiting circuit is always loaded to the positive end of the comparator, the current limiting circuit is real-time and reliable, and the circuit protects the laser in real time under the condition of not changing the quality of a driving signal, so that the current limiting protection function is achieved.

The invention discloses a high-image-quality ultraviolet objective lens based on a reflection symmetric structure, and particularly relates to the technical field of high-precision optical lenses, the high-image-quality ultraviolet objective lens comprises a ninety-degree prism and a protection window, a first lens is arranged on one side of the ninety-degree prism, a second lens is arranged on one side of the first lens, a third lens is arranged on one side of the second lens, and the protection window is arranged on the ninety-degree prism. A fourth lens is arranged on one side of the third lens, a fifth lens is arranged on one side of the fourth lens, and a sixth lens is arranged on one side of the fifth lens; the objective lens adopts a reflection symmetrical structure, incident and emergent rays are symmetrical to the axis, and the same lens is imaged in an up-down symmetrical position, so that the system magnification is constantly 1x, distortion can be compensated to be below 2 * 10 <-5 >%, the lens material has high transmittance and low absorption in an ultraviolet band, the focal plane temperature drift is reduced, accurate exposure is ensured, and the chip manufacturing yield is improved. And meanwhile, the modular design and the high-precision interface are convenient to assemble and maintain, and cost is reduced.

The present invention discloses a high-resolution, wide-angle vehicle optical lens and a vehicle rearview mirror, comprising a first meniscus negative lens, a second meniscus negative lens, a third biconvex positive lens, a fourth meniscus negative lens, a fifth biconvex positive lens, a parallel flat plate and an image plane IMA, which are sequentially arranged along the incident direction from left to right along the optical axis. The high-resolution, wide-angle vehicle optical lens and the vehicle rearview mirror provided by the present invention are composed of two glass spherical lenses and three plastic aspherical lenses. The fourth meniscus negative lens and the fifth biconvex positive lens can be glued into a glued lens or a separate lens. The overall structure is simple, the volume is small, and the cost is low. Clear imaging can be achieved within the range of ‑40° to 85°, the temperature drift is small, and the imaging requirement of 2 million pixels is met. It has a larger field of view and matches a larger image sensor. The field of view range that can be photographed can reach 164°, and the maximum imaging element can reach 4.8mm.

The invention belongs to the technical field of scanning tunneling microscopes, and particularly relates to a stable-imaging scanning tunneling microscope and a scanning imaging method. A scanning tunneling microscope capable of stable imaging comprises a microscope body, the microscope body comprises an outer frame, a driving unit, a sliding unit, a sample holder and a scanning unit, the outer frame is hollow, the driving unit and the sample holder are arranged at the two ends of the interior of the outer frame respectively, the sliding unit is arranged on the side wall of the interior of the outer frame, and the sample holder is arranged on the side wall of the interior of the outer frame. The scanning unit is fixedly arranged at the end, close to the sample holder, of the sliding unit, and the driving unit drives the sliding unit to push the scanning unit to conduct needle inserting or needle withdrawing in the length direction of the outer frame. The imaging quality and stability can be improved, and the situation of needle collision is avoided as much as possible.

This invention belongs to the field of integrated circuits, and specifically relates to a voltage reference circuit with a wide input range. The circuit structure includes a bias circuit and a reference voltage circuit. The input terminal of the bias circuit is connected to a resistor R0 and a power supply, respectively, and the output terminal is connected to the input terminal of the reference voltage circuit. The other end of the resistor R0 is connected to the negative terminal of a diode and the input terminal of the reference voltage circuit, respectively. The positive terminal of the diode is grounded. This invention proposes a novel voltage reference circuit with a wide input voltage range, which generates an output voltage with low temperature drift, simple structure, low design complexity, and small chip area.

A 4P lens capable of reducing temperature drift, the lens comprises, from the object side to the image side, along the optical axis, a first lens P1, a second lens P2, a third lens P3, and a fourth lens P4, an aperture STO is arranged at the front end of the lens, the first lens P1 is a biconvex positive lens, the second lens P2 is a crescent-shaped positive lens with a concave surface facing the object side and a convex surface facing the image side, the third lens P3 is a crescent-shaped negative lens with a concave surface facing the object side and a convex surface facing the image side, and the fourth lens P4 is a crescent-shaped positive lens with a convex surface facing the object side and a concave surface facing the image side. The 4P lens of the present invention effectively solves the temperature drift problem of the optical lens, and can maintain the same image quality level as that at room temperature at high and low temperatures; at the same time, it can also achieve the technical effect of shortening the total length TTL of the lens and high imaging quality.

The utility model discloses a soft start circuit, a switching power supply circuit and a servo driver, and the soft start circuit comprises a power supply access end which is used for accessing a first voltage; the first end of the energy storage circuit is connected with the power supply access end, and the second end is grounded; the energy storage circuit is used for charging when a first voltage is accessed to the power supply access end, and the output end voltage rises and is used for charging to a first predetermined voltage value after a first predetermined duration. According to the soft start circuit, under the action of the first voltage, the voltage at the output end rises to the first preset voltage value through the first preset duration, and the temperature excursion of a device for storing energy in the energy storage circuit is small, so that the soft start circuit can operate in different temperature environments.

The present invention discloses a high-resolution, wide-angle vehicle-mounted fisheye optical lens, wherein a first meniscus negative lens, a second meniscus negative lens, a third biconvex positive lens, a fourth biconvex positive lens, a fifth biconcave negative lens, a sixth biconvex positive lens, a protective glass and an image plane IMA are sequentially arranged along the incident direction from left to right along the optical axis. The high-resolution, wide-angle vehicle-mounted fisheye optical lens provided by the present invention is composed of two glass spherical lenses and four plastic aspherical lenses, has a simple structure, a small volume, and a low cost, can achieve clear imaging within the range of ‑40° to 85°, has a small temperature drift, meets the imaging requirements of 2 million pixels, has a larger field of view angle and imaging element than the optical lens of the prior art, the maximum field of view angle DFOV can reach 210°, the maximum imaging element can reach 6mm, has a higher resolution, and can match a larger sensor.

The invention relates to the technical field of semiconductors, and discloses a filter and a manufacturing method thereof. The filter comprises a substrate, a piezoelectric part, a first temperature compensation layer and / or a second temperature compensation layer, a first electrode, a second electrode, a protection layer, a first bonding pad and a second bonding pad. The piezoelectric part comprises a first side wall surface and a second side wall surface which are arranged back to back. The first temperature compensation layer is arranged on the first side wall surface, and the second temperature compensation layer is arranged on the second side wall surface. The first electrode is arranged on the first side wall surface. The second electrode is arranged on the second side wall surface. The protective layer is arranged on the upper surface of the piezoelectric part and extends outwards to be connected with the substrate after crossing the first electrode and the second electrode, a first cavity is formed in the first side wall face side of the piezoelectric part, and a second cavity is formed in the second side wall face side of the piezoelectric part. The first bonding pad and the second bonding pad are connected with the first electrode and the second electrode in a one-to-one correspondence mode. The temperature drift can be reduced, the reliability can be improved, and the occupied area can be reduced.

The utility model discloses a novel frequency signal power amplification circuit which comprises a signal input module, an operational amplification circuit, a power amplification circuit and a signal output module which are connected in sequence, and the operational amplification circuit comprises an operational amplifier U1A, an operational amplifier U1B and peripheral circuits thereof. The power amplification circuit comprises triodes Q1 to Q6 and peripheral circuits of the triodes Q1 to Q6; the model of the operational amplifier U1A and the model of the operational amplifier U1B are both SGMOP17C-2 amplifiers. According to the novel frequency signal power amplification circuit provided by the utility model, the output signal has the characteristics of high voltage, low temperature excursion, strong loading capacity and uneasy waveform distortion.

The utility model discloses a PTC motor temperature detection circuit and a motor control device, comprising a PTC sampling circuit and a one-chip microcomputer circuit, the PTC sampling circuit comprises a PTC thermistor used for detecting motor temperature, a divider resistor R1, a divider resistor R2 and a divider resistor R3, the divider resistor R1, the PTC thermistor, the divider resistor R2 and the divider resistor R3 are sequentially connected in series in a power supply loop along the flow direction of current; the single-chip microcomputer circuit is provided with a first voltage sampling port, a second voltage sampling port and a third voltage sampling port, the first voltage sampling port collects voltage V1 between the PTC thermistor and the divider resistor R1, and the second voltage sampling port collects voltage V2 between the PTC thermistor and the divider resistor R2. The third voltage sampling port collects the voltage V3 between the divider resistor R2 and the divider resistor R3. According to the utility model, the resistance value of the PTC thermistor is only related to the divider resistor R2, so that the temperature drift is greatly reduced, and the motor temperature detection precision can be greatly improved.

The invention discloses a binary regulation band-gap reference temperature drift and output voltage circuit, which belongs to the field of integrated circuits and comprises a band-gap reference circuit, a current regulation and control path, a first current mirror network and a second current mirror network. The band-gap reference circuit can generate Vout output voltage according to the structure of the band-gap reference circuit, if the output voltage Vout deviates from an ideal value, current on the resistor R3 and the triode Q4 can be adjusted through the first current mirror network, the second current mirror network and the current regulation and control access, and finally the output voltage Vout changes to reach the ideal value. The current source Ibias1 and the current source Ibias2 can be set according to needs, and the circuit is reliable in structure, rapid in response and capable of effectively protecting circuit work.

This application relates to the field of chip testing, and in particular to a test board, a test machine, and a test system for a tester. The test board includes a BE board, a PCB board, and a heat sink, stacked sequentially from bottom to top. The PCB board includes at least one test channel, which includes an analog area and a power area. A temperature sensor is provided in the analog area, and at least one heating element corresponding to the power area is provided on the heat sink. A control module is provided on the BE board, which is electrically connected to the temperature sensor and the heating element. The control module is used to acquire the temperature data of the analog area collected by the temperature sensor and to control the heating element according to the temperature data to keep the temperature of the analog area stable within a set range. This application uses air cooling coupled with active temperature control to control the temperature of the analog area, reducing the temperature drift of heat-sensitive devices in the test board during actual operation, thereby improving the output performance of the test board.

The invention belongs to the technical field of high-temperature semiconductor devices and radiation hardening, and particularly relates to a preparation method for improving the reliability of an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor). Comprising the following steps: preparing an epitaxial layer on a high-concentration SOI substrate; growing a field oxide layer on the epitaxial layer; coating photoresist on the surface of the field oxide layer, and etching by adopting photoetching, developing and a wet process to prepare an active region; growing a gate oxide layer in the opened active region at high temperature; gluing and photoetching a gate region on the surface of the gate oxide layer by adopting a Lift-off process, and then depositing a TiO2 dielectric layer with a high dielectric constant by adopting an ALD (Atomic Layer Deposition) mode; carrying out polycrystalline gate deposition on the surface of the TiO2 dielectric layer, and carrying out photoetching corrosion to form a polycrystalline gate; photoetching a pattern, and forming a source-drain region through source-drain injection; completing opening and metal deposition growth of each region, and completing metal wiring through photoetching corrosion; according to the invention, the problem that the threshold temperature drift is too large when the current MOSFET is in a special application environment is solved, and the overall reliability of the MOSFET device is improved.

The present invention belongs to the field of micro-electromechanical systems (MEMS), and specifically relates to a differential resonant MEMS accelerometer with adjustable stiffness, comprising: a sensitive mass block; a folded beam, one end of the folded beam is connected to the sensitive mass block, and the other end of the folded beam is connected to an anchor point; a straight beam resonator, one end of the straight beam resonator is connected to the sensitive mass block, and the other end of the straight beam resonator is connected to the anchor point, and the straight beam resonator is symmetrically placed about the center of the sensitive mass block to form a differential structure; a driving electrode and a sensing electrode are distributed on the same side of the straight beam resonator, and a control electrode is distributed on both sides of the straight beam resonator, and the driving electrode, the sensing electrode and the control electrode are of the same size, and the driving electrode, the sensing electrode and the control electrode are at the same distance from the straight beam resonator. The flexural stiffness of the straight beam resonator can be adjusted, the sensitivity and signal-to-noise ratio of the accelerometer are improved, and a mechanical frequency locking phenomenon is generated, and the early warning effect of acceleration is achieved by switching between two mechanical locking frequencies.

The application relates to the technical field of electric actuators, in particular to an absolute positioning method for an electric actuator, which solves the problems that the photoelectric encoder with zero point in the prior art needs to be powered to find zero, the absolute photoelectric encoder is constrained by the size of the electric actuator, the positioning resolution is not high, and the cost is relatively high; and the magnetic encoder is similar to the photoelectric encoder and belongs to a non-contact position sensor, and does not have the problem of abrasion. The absolute positioning method for the electric actuator comprises the cooperation of a relative photoelectric encoder and a high-line digital code disc, two relative encoder reading heads, and encoding relative code tracks, and the relative encoder reading heads and the encoding relative code tracks are used to acquire position increment information; two absolute zero point reading heads are used in cooperation, and the absolute position information is acquired through the characteristic code of the absolute zero point code track. The application realizes the above-mentioned high-precision absolute positioning by manufacturing a specific code disc and adding a power-off saving related circuit, and has the advantages of long service life, high precision, low temperature drift, compact structure and low cost.

The invention belongs to the field of advanced agricultural sensing, and particularly relates to a multi-channel photoelectrochemical sensing detection device based on LabVIEW. The device comprises a photoelectrochemical sensor, a lower computer and an upper computer, based on the photoelectrochemical sensor, the technical problem of false positive caused by extra voltage required to be applied to a traditional photoelectrochemical sensing system is solved, and high-sensitivity, high-specificity and trace detection is realized; meanwhile, the photoelectrochemical sensor adopts a multi-channel design, so that the problem that only a single pollutant can be detected is solved. The intelligent detection design with the single-chip microcomputer as the core solves the technical problems that a traditional work station is inconvenient to carry and the detection process is tedious. Wireless information transmission can be carried out for detection results, and the technical problem that the detection results can only be displayed through a display screen is solved; and the technical effects of data acquisition, processing and storage are realized in combination with a LabVIEW upper computer. And communication with equipment such as a smart phone and a computer through the Bluetooth module is also realized, and the application prospect is wide.

The invention discloses an aircraft tire pressure sensor, relates to the technical field of aircraft tire pressure monitoring, and can realize accurate monitoring of aircraft tire pressure under extreme working conditions. The sensor comprises a pressure sensor probe and a pressure regulator electrically connected with the pressure sensor probe; the pressure sensor probe comprises a temperature sensitive element and a pressure sensitive element, and the pressure sensitive element comprises a metal elastic membrane and a pressure detection circuit deposited on the metal elastic membrane by adopting a sputtering thin film process; the pressure sensor probe is used for detecting the tire pressure and the tire temperature and transmitting a detected pressure signal and a detected temperature signal to the pressure regulator; and the pressure regulator is used for performing signal modulation and error compensation processing on the pressure signal and the temperature signal to obtain a current signal for detecting pressure, and transmitting the current signal to the tire pressure monitoring system.