127results about How to "With temperature compensation function" patented technology

The invention belongs to the technical field of lenses, particularly to a high-definition super wide angle prime lens which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from the object space to the image space, wherein the fourth lens and the fifth lens adopt plastic aspherical lenses; the first lens, the second lens, the third lens and the sixth lens are glass spherical lenses; the first lens is a convex-concave negative focal power lens; the second lens is a bi-concave negative focal power lens; the third lens is a bi-convex positive focal power lens; the fourth lens is a bi-convex positive focal power lens; the fifth lens is a bi-concave negative focal power lens; the sixth lens is a bi-convex positive focal power lens. According to the high-definition super wide angle prime lens, glass lenses and plastic lenses are reasonably combined, so that a large aperture is realized, the imaging quality is good, 4 megapixel can be realized under the precondition that infrared does not focus again, and clear and bright monitoring pictures can be realized even at night with a low illumination level; the lens has a temperature compensation function, and can be used at the temperature of minus 30 DEG C-80 DEG C without being out of focus.

The invention provides a sequential equivalent sampling circuit and method based on delay signals. The sampling circuit and method are based on the time broadening principle, and a programmable delay line, a programmable delay chip, a level conversion chip, a highly stable crystal oscillator and an FPGA are used for achieving sampling clock signal delay. The phase-locked loop technology is used for performing phase locking on clock signals output by the highly stable crystal oscillator so as to reduce shaking of a clock; the FPGA is used for controlling the delay step length and the total delay of the programmable delay line and the programmable delay chip; mutual combination of coarse delay of the programmable delay line and fine delay of the programmable delay chip is used, high-precision and large-scale stepping delay is performed on sampling clock signals, the minimum delay step length is 10ps, and the total delay reaches 512ns. The sequential equivalent sampling circuit and method based on the delay signals can be widely applied to a sequential equivalent sampling system.

The invention belongs to the field of micro strain detection technology of high-temperature pipes, and particularly relates to a long period fiber grating strain gauge for micro strain detection of high-temperature pipes, which comprises an H-shaped metal substrate; the metal substrate comprises a first vertical beam, a second vertical beam and a crossbeam; an LPFG (Long Period Fiber Grating)1 is vertically fixed on the first vertical beam; an LPFG2 is horizontally fixed on the crossbeam; two ends of an LPFG3 are freely and vertically fixed on the second vertical beam; the LPFG1, LPFG 2 and LPFG3 are optically connected with one another; and the three high-temperature long period fiber gratings have different characteristic wavelengths. The long period fiber grating strain gauge for micro strain detection of high-temperature pipes has the advantages as follows: as the three high-temperature long period fiber gratings which are distributed in an H shape are adopted, the horizontal and vertical strains of high-temperature pipes can be detected at the same time; a temperature compensation function is provided so that the high-temperature pipes above 200 DEG C can be detected; the structure is simple and the mounting is convenient; and correct and effective detection can be carried out on the two-dimensional strain states of outer walls of the high-temperature pipes.

The invention discloses an online monitoring system for the current distribution of an aluminum electrolytic tank, belonging to the technical field of aluminum electrolysis. The online monitoring system for the current distribution of the aluminum electrolytic tank comprises at least one measuring device comprising an isometric pressure drop measurement fork or a magnetic field detection sensor, the isometric pressure drop measurement fork is used for measuring the isometric pressure drop value of an anode guide rod or a cathode steel bar of the aluminum electrolytic tank to be tested, the magnetic field detection sensor converts the magnetic induction intensity around the anode guide rod or the cathode steel bar into a proportional voltage value according to a Hall principle, and the measuring device is sequentially connected with a data processing device, a wireless network and an upper computer. The invention satisfies the measurement requirements under high-temperature high-dust environment with high magnetic field intensity, has high system flexibility, is favorable to far-distance signal transmission and can simultaneously monitor a plurality of aluminum electrolytic tanks.

The invention discloses a signal amplitude control device with a temperature compensating function, and relates to the signal control field of a communication radar system. The signal amplitude control device with a temperature compensating function includes an attenuator and a temperature compensating voltage source, wherein an output end of the temperature compensating voltage source is connected with a control end of the attenuator; and the temperature compensating voltage source detects the operating ambient temperature, converts different ambient temperatures into different control voltages and supplies the control voltages for the control end of the attenuator, so that the attenuator can keep constant attenuation in different ambient temperatures, because of the compensation effect of the temperature compensating voltage source. The signal amplitude control device with a temperature compensating function has the advantages of being simple in structure, being easy to implement, and being able to realize stable and accurate signal amplitude control without extra software control and artificial intervention.

The invention relates to the technical field of electrons, and particularly relates to an equivalent sampling circuit based on a programmable time delay chip. The equivalent sampling circuit comprises a signal generation module U1, a time delay module U2 and a sampling gate circuit module U3, which are connected in sequence, and a control module U4 connected with the signal generation module U1 and the time delay module U2 separately. The sampling circuit expands a high speed periodic signal based on the equivalent time sampling principle, a precise time delay stepping system necessary for the equivalent sampling can be established by the programmable time delay chip, a level conversion chip, a high-stability crystal oscillator and a field programmable logic array FPGA, a dynamic adjustment range and a precise time delay function can be simultaneously satisfied, the minimum time delay step length is 10 ps, and the total time delay can be indefinitely long in theory. The technology can be widely applied to a sequential equivalent sampling system.

A reference voltage generation circuit with a temperature compensating function relates to the reference voltage source technical field; the reference voltage generation circuit comprises a positive temperature coefficient voltage generation circuit and a similar LDO circuit connected in sequence; the positive temperature coefficient voltage generation circuit comprises single-stage or multistage unit circuits, wherein each stage unit circuit comprises a bias current source P using a MOS pipe and two NMOS pipes; unit circuits of various stages are cascaded in sequence; the grid electrode of NMOS pipe A and the grid electrode of NMOS pipe B in each stage unit circuit are connected, and respectively connected with the drain electrode of the NMOS pipe A and the drain electrode of the bias current source P; the source electrode of the NMOS pipe A and the drain electrode of the NMOS pipe B are connected to serve as an output node; the current generated by the bias current source P passes the NMOS pipe A and NMOS pipe B of the same stage, and is connected the source electrode of the NMOS pipe A and drain electrode of the NMOS pipe B of the next stage unit circuit through the source electrode of the NMOS pipe B of the previous stage; the similar LDO circuit comprises an operational amplifier and an output unit; the reference voltage generation circuit can effectively reduce system power consumption without obviously increasing area, and has the temperature compensating function.

The invention provides a signal conversion device used in a sound field scanning system of an ultrasonic phased array energy converter. The signal conversion device has the function of converting a single-path pulse signal into a double-path difference encoder signal to finish the stimulation of the energy converter and the synchronous triggering of a data acquisition card. The signal conversion device utilizes independent elements including a logic inverter, a resistor, a capacitor and the like, RC (Remote Control) respond properties and reshaping properties of a logic gate circuit are used to realize the delaying of single-path pulses, so as to generate the double-path difference encoder signal with a certain phase difference. According to the signal conversion device, the pulse quantity of an encoder is the same as the quantity of input pulses and the widths of two paths of the pulses keep the same. An output signal is converted into a difference signal by using a phase inverter to improve the anti-jamming capability. With regard to the widths of the different input pulses or the frequencies of the different pulses, the signal conversion device can be adapted by simply adjusting capacitance and resistance parameters in the circuit. The device provided by the invention is small in volume, low in cost and easy to implement; functions can be expanded; the signal conversion device is applicable to the field of large-range pulse width conversion.

The invention relates to a non-contact type high-accuracy array electromagnetic thickness gauge. The non-contact type high-accuracy array electromagnetic thickness gauge comprises an electromagnetic thickness gauge electronic short joint, an electromagnetic thickness gauge signal receiving short joint and an electromagnetic thickness gauge magnetic field exciting short joint which are sequentially connected, wherein the electromagnetic thickness gauge signal receiving short joint is a cage-free type array probe structure. The non-contact type high-accuracy array electromagnetic thickness gauge has the advantages that the layout is reasonable, the structure is simple, the surface of a tested oil casing is completely covered, the measuring accuracy is high, and the requirement of engineering measuring of high-temperature and high-pressure oil and gas wells is met.

The invention relates to a non-contact vehicle gear sensor, wherein the axial top part of a shell of the non-contact vehicle gear sensor is equipped with an upper cover plate while the axial bottom part of the shell of the non-contact vehicle gear sensor is provided with a lower cover plate; a circuit board is arranged on the inner side of the upper cover plate; a hall chip is connected to the circuit board; the hall chip is located in the shell; the outer side of the hall chip is equipped with a hollow rotating shaft; a magnetic conducting ring is sleeved on the upper part of the hollow rotating shaft, corresponding to the hall chip; one side wall in the magnetic conducting ring is connected with a magnet; the magnet corresponds to the hall chip; a locating ring is radially arranged on the middle part of the outer side of the hollow rotating shaft; a return spring is sleeved on the hollow rotating shaft on the lower part of the locating ring; and the upper end and the lower end of the return spring are located on the locating ring and the lower cover plate. According to the non-contact vehicle gear sensor disclosed by the invention, the contact abrasion problem is solved; the service life of the sensor is largely prolonged; and the working reliability and the safety are improved.

The invention relates to a multispectral extra-large aperture telescope objective. The multispectral extra-large aperture telescope objective comprises a front-convex and back-concave positive focal power first lens, a front-convex and back-concave positive focal power second lens, a front-convex and back-concave positive focal power third lens, a biconcave or front-convex and back-concave negative focal power fourth lens, a biconcave or front-convex and back-concave positive focal power fifth lens, a front-convex and back-concave positive focal power sixth lens, a biconcave or front-concave and back-convex negative focal power seventh lens and aperture diaphragms which are arranged in sequence from the object plane side to the image plane side, wherein the aperture diaphragms can be located at multiple positions. A conventional method that a glued lens is used for eliminating chromatic aberration of the lens is not adopted, the risk that the phenomena of glue failure, gummosis, glue hardening and the like occur in extremely high and low temperature environments when the glued lens is used is avoided, and the usage temperature range of the lens is widened. By optimizing lens focalpower matching and reasonably selecting lens materials, the overall length of the lens is effectively reduced, the size of the lens is reduced, and the weight of the lens is lowered.

The invention relates to a position sensor for a non-contact clutch, which solves the problems that the poor contact existing in the prior position sensor of the non-contact clutch leads to poor operational reliability and so on, The position sensor for the non-contact clutch comprises a shell, a rotor, a circuit board and so on, wherein a magnetic steel ring is arranged in the cylindrical rotor, the inner wall of the magnetic steel ring is symmetrically provided with two permanent magnet blocks respectively, and a cavity is formed between the two permanent magnet blocks; and the middle part of the circuit board is connected with an A Hall chip and a B Hall chip through two conducting member bars respectively, and the A Hall chip and the B Hall chip are positioned in the cavity between the two permanent magnet blocks. The sensor solves the problem of contact wear and prolongs service life; the sensor has good linear output characteristic and ensures that an output signal is more accurate and stable; the adopted Hall chips have functions of programmable property and temperature compensation, can flexibly change parameters of output voltage according to the requirement of customers, and automatically compensate and calibrate the magnetic field drift when the magnetic field intensity of a magnet drifts with the change of the temperature.

The invention relates to a noncontact-type EGR (Exhaust Gas Recirculation) valve position sensor. The sensor is provided with a hat-shaped shell, a guide pole is arranged in a blind hole in the middle of the shell, the other end of the guide pole extends outwards, a pull-back spring is arranged between the guide pole and the bottom of the blind hole of the shell, a magnet block is arranged on the upper lateral surface of the guide pole, a circular circuit board is sleeved at the lower part of the guide pole, and a hall chip is welded on the circuit board through conductor pins in a straight bar shape and arranged in the blind hole at the magnet block side of the shell. The invention is used for solving the problem of contact abrasion of the sensor and has greatly prolonged working service life, favorable linear transmission characteristics and more accurately and stably output signals. When a hall element axially moves along the lateral surface of the magnet block, and a linearly-variable magnetic field can present in a certain displacement range, is linearly converted by the hall chip and finally outputs a linearly-variable voltage. The invention achieves the linear output requirement of the EGR position sensor by utilizing the favorable linearity characteristic in the region.

The invention belongs to the technical field of optical devices and particularly relates to a high-pixel ultrashort starlightlens. The high-pixel ultrashort starlight lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens sequentially from object space to image space, wherein the first lens, the third lens and the fourth lens are glass spherical lenses; the second lens, the fifth lens and the sixth lens are plastic aspherical lenses; the first lens is a plano-concave lens with negative focal power; the second lens is a concave-convex lens with negative focal power; the third lens is a biconvex lens with positive focal power; the fourth lens is a biconvex lens with positive focal power; the fifth lens is a biconcave lens with negative focal power; the sixth lens is a biconvex lens with positive focal power. In conclusion, the advantages of easy processing of the glass spherical lenses and high performance and low cost of the plastic aspherical lenses are exerted sufficiently, so that the visible light resolution of the lens can reach 5-mega pixels, the infrared resolution can reach 5-mega pixels, F-number of the lens reaches 1.2, the lens has sufficient light flux, and pictures are clear and bright. Meanwhile, the total length of the lens is smaller than 22 mm, and the lens is compact in size.

The invention discloses a high-precision fiber bragg grating displacement meter with the function of temperature compensation. The high-precision fiber bragg grating displacement meter comprises a sensitive part, a spring and a feeler lever which are sequentially connected on the same central axis. The sensitive part comprises an optical fiber base, a strain measurement optical fiber grating and atemperature measurement optical fiber grating, and the strain measurement optical fiber grating and the temperature measurement optical fiber grating are both arranged on the optical fiber base. Thesensitive part and the spring are arranged on the same central axis, the number of influence factors in the measurement process is small, sensor repeatability and hysteresis errors are small, and linear fitting precision is high. The fiber bragg gratings comprise the strain grating and the temperature grating; when the environment temperature changes, temperature compensation is conducted on the strain grating through the temperature grating, the temperature compensation function is achieved, and the measurement precision is improved. The fiber bragg grating displacement meter is simple in structure, stable in performance and capable of measuring displacement and temperature simultaneously.

The invention provides an APD bias voltage compensation circuit, an APD bias voltage compensation method and system, a storage medium and a control terminal. The APD bias voltage compensation circuitcomprises an APD bias voltage circuit, a temperature detection circuit, an amplification circuit and the control terminal. The APD bias circuit provides bias voltage for the APD under the control of the control terminal; the amplifying circuit amplifies dark current generated by the APD into a voltage signal and sends the voltage signal to the control terminal; the temperature detection circuit collects temperature information of the APD and sends the temperature information to the control terminal; and the control terminal adjusts the bias voltage according to the voltage signal so as to enable the dark current to be a preset value, and adjusts the bias voltage according to the temperature information so as to enable the dark current to be kept at the preset value when the temperature information changes. According to the APD bias voltage compensation circuit, the compensation method and system, the storage medium and the control terminal, the optimal gain state of the APD at different temperatures can be obtained.

The invention discloses a high-precision automatic power control circuit with temperature compensation. An input end of a voltage controlled attenuator is used as the input end of the automatic power control circuit, an output end of the voltage controlled attenuator is connected with the input end of a power amplifier, the output end of the power amplifier is connected with the input end of a coupler, one output end of the coupler is used as the output end of the automatic power control circuit, the other output end of the coupler is connected with the input end of a high-precision root-mean-square detector, the output end of the high-precision root-mean-square detector is connected with one input end of a low noise operational amplifier, the other input end of the low noise operational amplifier is connected with one end of a thermistor, the other end of the thermistor is connected with a reference voltage, and the output end of the low noise operational amplifier is connected with a control end of the voltage controlled attenuator to control the voltage controlled attenuator. The high-precision automatic power control circuit can automatically adjust the output power of the power amplifier and meanwhile automatically compensate the fluctuation of the output power at different temperatures so as to keep the stability of the output power.

The invention provides a wearable body temperature monitoring intelligent temperature sensor and a monitoring method thereof. The sensor comprises an MCU control unit, a temperature signal processingunit, a temperature probe group switch unit, a temperature probe group, a voltage dividing unit, a display unit and a voltage stabilizing unit; the temperature probe group comprises multiple NTC temperature probes and a fixing device used for fixing the temperature probes, and the NTC temperature probes are fixed to the fixing device according to a certain order, and the temperature probe group isplaced under the human axilla to measure the body temperature; the MCU control unit is used for controlling the temperature probe group switch unit, driving the probes in the temperature probe groupin sequence, and collecting temperature probe signals of all positions in sequence; the voltage stabilizing unit is used for providing precise voltage, temperature probe group signals are calculated through MCU, and a temperature value of a monitored body is obtained and displayed in the display unit. Accordingly, the temperature measurement precision is high, the heating up time is short, the temperature compensation function is achieved, a temperature measurement value is not affected by the environment temperature, and whether or not the intelligent temperature sensor makes good contact with the monitored body can be accurately judged.

The invention provides a soil settlement observation and measurement system based on a Bragg grating, and relates to a soil settlement observation system. The soil settlement observation and measurement system based on the Bragg grating comprises a deformation plate, a fixed plate, a settlement rod and another deformation plate, wherein the settlement rod is arranged on the deformation plate; one end of the deformation plate is fixed at the other end of the fixed plate and is connected with the settlement rod; a deformation testing Bragg bare grating is arranged in the middle of the deformation plate and is connected with a temperature compensation Bragg bare grating through a single-mode single-core optical fiber; and the deformation testing Bragg bare grating and the temperature compensation Bragg bare grating are connected to a Bragg grating demodulator. Compared with the prior art, the measurement system is provided with an optical fiber sensor, so that influence of electromagnetic interference is avoided. Meanwhile, the soil settlement observation and measurement system has a temperature compensation function. The measurement system is stable in operation and high in measurement precision, can be regulated and changed according to measurement requirements, and can adapt to measurement of most of settlement surfaces.

The invention discloses a gold nanopore thin film three-electrode ionizing sensor array having a temperature compensation function. The array comprises n sensors with different inter-electrode distances; one sensor is used for detecting the temperature, and a collected current value increases along with increase of the temperature. The other multiple sensors are used for detecting the concentration of mixed gas, and a collected current value decreases along with increase of the gas concentration. Each sensor comprises a first electrode, a second electrode and a third electrode, the inner surface of each first electrode is attached with a metal film substrate distributed with gold nanopores and is provided with small ventilating pores, and the first electrodes of the n sensors are fabricated on a same polar plate; each second electrode is provided with small lead-out pores; each third electrode is provided with a deep groove; the three electrodes are isolated through insulating pillars; the inter-electrode distance of each sensor is set according to the pore diameter of the small ventilating pores, the pore diameter of the lead-out pores and the side length and depth of the deep groove. The sensor array has the advantages of small working voltage, high collected current and high sensitivity, and can be used for simultaneously detecting the gas concentration and temperature of all components.

The invention discloses an error correction system and method for a fire scene air pressure height sensor. The system comprises a capacitive pressure sensor, a temperature sensor, a multiplexer, a signal conditioning circuit, a memorizer circuit, a digital interface circuit, a calibration coefficient input circuit, a microprocessor and a wireless communication circuit. A multi-path capacitive airpressure height sensor is adopted, a temperature compensation function is achieved, the measurement accuracy of a single-path capacitive air pressure height sensor is greatly improved, through a multi-path capacitive type air pressure height sensor weighted fusion algorithm, calibration compensation work of the air pressure height sensor is completed, the measuring precision and the safety reliability are much higher than those of an existing product, the actual working accuracy of the air pressure height sensor is improved, interference factors from the air pressure height sensor itself and environment are reduced to the minimum, and the system is suitable for height positioning of inside fire fighting personnel in the fire scene, ingenious in method, novel in structure and has a good application prospect.

The invention discloses a LOGO lamp circuit with breathing effect, comprising: a linear voltage stabilizer circuit module connected with an LIN transceiver circuit module, a single-chip microcomputerdetection control circuit module and an LED drive circuit module; a power voltage detection circuit module connected with a power voltage module and the single-chip microcomputer detection control circuit module; the LIN (local interconnect network) transceiver circuit module connected with a BCM (body control module) and the single-chip microcomputer detection control circuit module; an interiorambient temperature detection circuit module connected with the linear voltage stabilizer circuit module and the single-chip microcomputer detection control circuit module; the LED drive circuit module connected with the single-chip microcomputer detection control circuit module and an LED lamp and used to drive the LED lamp to change; the single-chip microcomputer detection control circuit moduleconnected with the LED drive circuit module and used to detect a signal and control the above modules. An automotive LOGO lamp is used herein to implement the functions, such as a position lamp, a charging indicator lamp, a breathing lamp, and a low battery warning indicator lamp, and the integrity is high.