612 results about "Thermistor" patented technology

The invention belongs to the technical field of semiconductor testing, and discloses a thermistor performance monitoring method and system based on a power module reliability test. The method comprises the following steps: configuring a pin connection structure electrically connected with a thermistor lead on a test burn-in board for a high-temperature, high-humidity and high-voltage reverse bias test; in the process of executing a high-temperature, high-humidity and high-voltage reverse bias test on the power module comprising the thermistor, a lead of the thermistor is electrically connected with a preset current detection loop through the pin connection structure, so that monitoring current flowing through the thermistor is received by the current detection loop, and thermistor performance monitoring is executed. According to the application, the problem that the self degradation risk of the thermistor cannot be monitored in real time in the H3TRB test process to cause a monitoring blind area can be solved, the whole-process monitoring of the performance fluctuation of the thermistor in the strong electric field and high humidity coupling environment is realized, and the integrity of the reliability evaluation of the power module and the safety of the test system are remarkably improved.

The invention discloses a current self-adaptive control system and device for electric vehicle charging, and relates to the technical field of electric vehicle charging control. According to the system, through a charging gun and a negative temperature coefficient thermistor array on a cable, temperature data of a preset weak part in an electric vehicle charging loop are collected; preliminarily estimating local resistance of each node based on local voltage drop and loop current data acquired by the paired differential voltage sampling points; the local resistance is corrected according to the temperature data to obtain a corrected resistance value, and after controlled current excitation of a preset time window is applied, the corrected resistance value is verified and corrected in combination with temperature response to obtain a corrected resistance value; and determining the maximum allowable current-carrying value of each sampling node based on the corrected resistance value, taking the minimum value as the maximum safe current-carrying limit of the charging loop, and adopting phase control and / or periodic on-off control within the maximum safe current-carrying limit to realize current-limiting management and control of the charging loop, thereby improving the safety and reliability of the charging process of the electric vehicle.

The invention provides a wind turbine generator running temperature monitoring method and system, and the method comprises the steps: installing temperature sensors at a generator, a gear box, a main shaft bearing and a cabin environment of a wind turbine generator, and collecting temperature signals in real time; filtering the acquired signal, sending the filtered signal to a reference temperature unit, and comparing the filtered signal with a standard temperature signal to obtain a deviation; calculating a compensation coefficient according to the deviation and performing temperature drift compensation on the signal; and the corrected signal is digitalized by the analog-to-digital conversion module and then input into the controller. A reference temperature unit and a compensation calculation module are arranged in an acquisition system to form an independent calibration loop. The system reads a standard temperature signal in real time and calculates the deviation while collecting the temperature signal, and then performs linear or segmented correction compensation according to the deviation, so that the measurement error of the thermocouple or the thermistor caused by environment temperature change, aging or lead resistance drift can be effectively counteracted, and the output temperature value is always kept consistent with the actual temperature.

A system includes an inverter configured to convert DC power from a battery to AC power to drive a motor, wherein the inverter includes: a power module, the power module including a thermistor assembly, the thermistor assembly including: a conductive layer including a trench; a thermistor connected to the conductive layer and disposed across the trench; and a first height control feature between the conductive layer and the thermistor.

The invention discloses an electromagnetic heating system, and a method and a device for detecting the thermistor of the electromagnetic heating system. The method comprises the following steps of: recording the temperature value obtained by the thermistor as a first temperature value when the electromagnetic heating system is powered on; recording the temperature value obtained by the thermistoras a second temperature value when the electromagnetic heating system is in a standby state; obtaining the maximum temperature value and the minimum temperature value of the temperature value obtainedby the thermistor in a continuously preset second preset time every other first preset time during the heating process of the electromagnetic heating system; and judging whether the thermistor is ina failure state or not according to the first temperature value and / or the second temperature value, the maximum temperature value, and the minimum temperature value. The method for detecting the thermistor of the electromagnetic heating system judges whether the thermistor fails or not according to the static temperature values at the time of power-on and standby and the dynamic temperature valuein the heating process, so that the accuracy and the reliability of the judgment are greatly improved, and the safety of the system is improved.

The invention discloses a high-precision SMD MELF thermistor function testing machine. The high-precision SMD MELF thermistor function testing machine comprises a rack; the constant-temperature oil tank is arranged on the rack, and a temperature equalizing pump is arranged on the constant-temperature oil tank; the material distributing mechanism comprises a magnetic groove and a material distributing disc, the magnetic groove is formed in the rack, the material distributing disc is located at one end of the magnetic groove, the material distributing disc is rotationally connected to the rack, a plurality of first material grooves are formed in the material distributing disc at equal intervals in the circumferential direction of the material distributing disc, and a first magnetic block is arranged at one end of each first material groove; the test material distribution disc is rotationally connected to the rack, a plurality of second material grooves are formed in the test material distribution disc at equal intervals in the circumferential direction of the test material distribution disc, a second magnetic block is arranged at one end of each second material groove, the second material grooves are right opposite to the first material grooves at the transfer points of the material distribution disc and the test material distribution disc, and the partial area of the bottom of the test material distribution disc is located in the constant-temperature oil groove. Compared with the prior art, the MELF thermistor resistance testing device can solve the problems that an existing MELF thermistor resistance testing device is low in efficiency and poor in precision.

The invention discloses a normal-temperature and high-temperature integrated testing device for the resistance value of a thermistor in the wave crest axial direction, and the device comprises a normal-temperature testing module which comprises a feeding mechanism, a first straightening mechanism, a normal-temperature testing mechanism and a conversion belt material wheel which are sequentially disposed on a first rack in the conveying direction of the thermistor; the high-temperature testing module comprises a second rack, a second straightening mechanism, a high-temperature testing mechanism and a classified material receiving mechanism, and the second straightening mechanism, the high-temperature testing mechanism and the classified material receiving mechanism are sequentially arranged in the conveying direction of the thermistors on the second rack; wherein the normal-temperature testing mechanism comprises a normal-temperature oil groove and a normal-temperature testing wheel, and a first cover plate corresponding to the normal-temperature oil groove in position is arranged on the working table of the first rack. Compared with the prior art, the problem that resistance testing of a large number of wave crest axial thermistors at the normal temperature and the high temperature cannot be rapidly achieved through existing equipment is solved.

The embodiment of the application provides a kind of fluid detection device and control method, electronic equipment, it is related to fluid measurement technical field, for reducing the fluctuation of the performance of fluid detection device with environmental temperature variation.The fluid detection device includes voltage source, at least one heating element, at least one thermistor and controller.The thermistor generates the first signal corresponding to the temperature of the thermistor.When the environmental temperature where the thermistor is located is the first environmental temperature, the voltage source at least outputs the first voltage to the thermistor, and when the environmental temperature where the thermistor is located changes from the first environmental temperature to the second environmental temperature, the voltage source at least outputs the second voltage to the thermistor, so that the microphone module can still maintain higher performance.

The invention provides a temperature sensor, a temperature detection unit and a chip, and relates to the technical field of chips. The temperature sensor comprises a first RC branch which comprises a first thermistor and a first capacitive device, and the first thermistor and the first capacitive device are connected between a first node and the ground in parallel; the second RC branch comprises a second thermistor and a second capacitive device, and the second thermistor and the second capacitive device are connected between the second node and the ground in parallel; the control circuit comprises a first input end, a second input end, a third input end, a fourth input end and an output end, the first input end is connected with the first node, the second input end is connected with the second node, the third input end is used for receiving reference voltage, and the fourth input end is used for receiving a control signal; the control circuit is used for responding to a control signal and reference voltage, controlling the first node A and the second node B to charge and discharge in turn and outputting a waveform signal at the output end, and the period of the waveform signal is related to the first thermistor and the second thermistor.

Temperature sensor assembly for an induction hob. The temperature sensor assembly includes an axial thermistor and a support having a base on which the thermistor is horizontally arranged. The thermistor includes an elongated main body, a first pin projecting from a first end of the main body, and a second pin projecting from a second end of the main body. The first pin is connected to a first connecting cable forming a first connecting segment, and the second pin is connected to a second connection cable forming a second connecting segment. The first pin includes an initial bent segment and an additional segment following the initial bent segment which is arranged on the base of the support on one side of the main body of the thermistor and extends at least to the second end of the elongated main body in an axial direction defined by the elongated main body.

A liquid level sensor can include a circuit board and a thermistor bridge supported by the circuit board comprising a first pair of thermistors and a second pair of thermistors. A heat sink can be coupled to the circuit board proximate the first pair of thermistors and not the second pair of thermistors. A power supply can be configured to provide pulses of electrical current through the thermistor bridge. A controller in communication with the thermistor bridge can be configured to receive a measurement signal from the thermistor bridge output a low product indication when the measurement signal satisfies a predetermined condition.

The utility model provides a power-down holding circuit for a switching power supply, which relates to the technical field of switching circuits and comprises a thermistor RT2, a diode D1 and a plurality of electrolytic capacitor banks connected in parallel, and the thermistor RT2 is connected in series with the electrolytic capacitor banks after being connected in parallel with the diode D1. According to the utility model, the circuit structure is simple, and components are few; the impact current is effectively reduced by adopting the power-down holding circuit; and after the input power supply is cut off, the diode D1 is used for discharging the loop, so that the output delay power failure is realized. Meanwhile, by changing parameter matching and device type selection of the power-down holding circuit, different power-down holding time is achieved, the performance is reliable, and therefore the design cost is greatly reduced.

Disclosed are a mounting structure of a thin film temperature sensor and a temperature sensing device. The thin film temperature sensor is provided with a thermistor and a lead wire. The mounting structure comprises: a pressing structure made of a heat-insulating and insulating material, comprising a close-pressing structure and a fixing structure for a temperature sensing surface of the thin film temperature sensor, the close-pressing structure being a planar close-pressing structure or a curved close-pressing structure and having a recess, and the fixing structure being used for fixing the mounting structure of the thin film temperature sensor. The buckle structure comprises a metal sheet and a metal buckle extending from the metal sheet or coupled with the metal sheet, the metal sheet having a temperature sensing surface in contact with a measured object, the temperature sensing surface having an opening, wherein the buckle is fastened to the pressing structure, the head of the thermistor of the thin film temperature sensor is pressed into the position of the recess of the pressing structure, and the head of the thermistor of the thin film temperature sensor is exposed from the opening of the temperature sensing surface and is flush with or higher than the temperature sensing surface.

The application provides a real-time monitoring device and method for air supplement amount of a Francis turbine unit of a hydropower plant, and relates to the field of Francis turbine units of hydropower plants.The device comprises a thermistor, an air supplement pipe, a current generator, a thermistor temperature sensor, a current regulator and a wind speed regulator, wherein the thermistor is fixed in the middle of the air supplement pipe, and the current generator generates rated voltage to heat the thermistor; the current regulator is used for real-time measurement of output current of the thermistor and records the change frequency of the output current; the wind speed regulator is used for measurement of wind speed at the air supplement pipe opening; and the thermistor temperature sensor is used for measurement of the temperature of the thermistor. The application fixes the thermistor in the air supplement pipe, determines the relationship curve between the air supplement amount and the output current, solves the problem that the air supplement amount of the Francis turbine unit cannot be monitored, and uses the thermistor principle to realize accurate measurement, is durable and not easy to be damaged, is convenient to install, can be introduced into a monitoring system, and can be monitored in real time on a host computer.

The utility model relates to the technical field of industrial semiconductors, and discloses a device for detecting the working state of a lamp holder of ultraviolet light curing equipment, which integrates temperature, wind pressure and ultraviolet light intensity detection functions by optimizing the structure of a hardware circuit. The circuit comprises a switch type capacitor voltage converter, a linear voltage regulator, a phototriode, an NTC thermistor, a partial pressure sensor and a CAN communication module. Through the bidirectional TVS diode, RC filtering and two-stage voltage stabilization design, the anti-electromagnetic interference capability is improved, and the signal transmission reliability is improved; temperature, wind pressure and illumination detection circuits are integrated on a single board, the structure is simplified, and the space is saved; the standby energy consumption of the sensor is reduced through hardware power management; by comprehensively optimizing the circuit structure and the signal transmission path, the detection reliability of the working state of the lamp holder of the ultraviolet curing equipment is improved.

The application discloses a charging interface and an electronic device. The charging interface comprises an electro-deformation mechanism, a charging terminal is arranged on the electro-deformation mechanism, and the electro-deformation mechanism can be converted between a first state and a second state with voltage change; a thermistor is electrically connected with the electro-deformation mechanism and used for adjusting voltage at both ends of the electro-deformation mechanism, and the resistance of the thermistor changes with temperature change of the charging interface; when the temperature of the charging interface is lower than a preset temperature, the resistance of the thermistor is within a first preset range, the electro-deformation mechanism is in the first state, the charging terminal is electrically connected with an external charging connector to charge the electronic device; and when the temperature of the charging interface is higher than the preset temperature, the resistance of the thermistor is within a second preset range, the electro-deformation mechanism is in the second state, and the charging terminal is disconnected with the external charging connector.

This invention discloses an insulating encapsulation structure and connection method for a probe temperature sensor, relating to the field of temperature sensor technology. The insulating connection bracket has an outer insulating and thermally conductive protective layer, and contains insulating adhesive and a temperature-sensing component. The specific implementation is as follows: an insulating layer assembly, a built-in snap-fit ​​structure within the insulating connection bracket, and an eccentric cavity for housing the temperature-sensing component. A thermistor glass body is used as the insulator. In the insulation process, direct contact between the glass body and the inner wall of the bracket reduces one useless insulating layer. The cavity formed by the end of the insulating connection bracket and the insulating layer assembly houses the temperature-sensing component. The cavity contains a clearance structure for the thermistor pins and multiple layers of insulation between the pins and the conductive copper wires. A fluid insulating adhesive is used, and then the insulating connection is cured. Finally, the encapsulation is placed inside a metal shell containing insulating adhesive and cured, thus forming multiple layers of effective insulation and sufficient safe insulation thickness between the thermistor conductive pins and the metal shell.

The utility model relates to candle lamp technical field, specifically disclose a candle lamp controller with safety protection structure, including the shell, the shell is cylindrical barrel -shaped structure, the outer surface of one end of shell away from the soft light cover snap -on installation has the bottom shell, the inside snap -on installation of shell has control mainboard. This candle lamp controller with safety protection structure, when candle lamp after a period of use control mainboard and LED lamp circuit board will produce heat, at this time heat will be conducted to the heat dissipation silica gel pad and the heat conduction silica gel pad, at this time through thermistor can monitor the operating temperature of candle lamp, make temperature exceed the limit value of thermistor after, LED lamp circuit board can automatically power off to reduce the temperature rise, reduce the melting or combustion fire of shell, soft light cover and other components due to long -term use, greatly promote the safety of candle lamp use time and promote the life of use.

This negative-characteristic thermistor is provided with: a ceramic substrate formed from a ceramic composition containing Mn, Ni, and Fe; and an external electrode provided at an end portion of the ceramic substrate, in which the external electrode includes a base layer covering the end portion of the ceramic substrate and including Cu and glass, and a plating layer covering the base layer, and the Ni content, the Mn content, and the F content in the ceramic substrate satisfy the following formulae (1) and (2): 26.4 mol% < = [Ni] < = 29.5 mol%, 1.65 < = [Mn] / [Fe] < = 1.90 (2). Wherein [Ni], [Mn], and [Fe] are the contents (mol%) of Ni, Mn, and Fe, respectively, when the total content of Mn, Ni, and Fe contained in the ceramic matrix is 100 mol%.

The present application relates to the technical field of condensing fan, and discloses a dual-purpose condensing fan structure for a freezer, which comprises a U-shaped double-path air inlet pipeline and an air outlet pipeline, the air outlet pipeline is communicated with the U-shaped double-path air inlet pipeline, the U-shaped double-path air inlet pipeline and the air outlet pipeline are arranged in a Y shape, first and second condensers are respectively installed at two ends of the U-shaped double-path air inlet pipeline, a fan is arranged in the air outlet pipeline, and first and second compressors are symmetrically arranged below the fan and installed on the air outlet pipeline. The present application is provided with a lifting assembly which can be lifted and lowered in the air outlet pipeline, and through the combination of a heat-sensitive propulsion assembly, i.e. an NTC thermistor and an electric hydraulic rod, the air flow temperature is monitored in real time, when the air flow temperature is too high, the electric control system drives the lifting assembly to descend, the effective ventilation area of the side edge through hole group is reduced, the air flow speed is actively reduced, and the residence time of the air flow on the surface of the condenser is prolonged, so that the heat exchange amount is improved.

The invention provides a temperature measuring device and method for a pattern forming device, and relates to the technical field of semiconductor manufacturing and precision measurement. The device comprises thermistor sensors which are arranged at temperature measuring points of a pattern forming device; the transmission flexible circuit board is electrically connected with the thermistor sensor through a first transmission wire; the temperature data acquisition instrument is electrically connected with the transmission flexible circuit board through a second transmission wire; the upper computer is in communication connection with the temperature data acquisition instrument; wherein the upper computer is used for calibrating the thermistor sensor based on standard temperature acquired by the standard temperature sensor, and the temperature data acquisition instrument is used for receiving a resistance value output by the thermistor sensor and transmitted by the transmission flexible circuit board and converting the resistance value into temperature data.

This invention relates to the field of thermal power generation and turbine mechanical condition monitoring technology. The invention discloses a supercritical CO2 turbine temperature monitoring device with online temperature sensing element replacement function and its installation method, including a temperature sensing device housing, a temperature sensing element, and a lead wire connection assembly. The temperature sensing element includes an armored lead wire body and a temperature sensing element thermistor. The temperature sensing device housing includes a flange, an insertion section and a connecting section respectively disposed at both axial ends of the flange. A first receiving cavity is provided axially inside the temperature sensing device housing. The opening of the first receiving cavity is located at the end of the connecting section, and its bottom is located at the end of the insertion section. A connector mounting seat is threadedly connected to the end of the connecting section away from the insertion section. The armored lead wire body is detachably connected to the connector mounting seat through the lead wire connection assembly, and its end is located at the bottom of the first receiving cavity. The insertion section is used to pass through the insertion through-hole of the outer cylinder and extend into the temperature sensing hole of the inner cylinder. This invention has the advantages of good sealing effect and online maintenance capability.

To provide an oxide thermistor which has a smaller change in resistance in a high temperature environment, and a method for manufacturing the same.SOLUTION: Provided is an oxide thermistor having Mn and Co as main ingredients, with Cu and M furthermore added thereto. The crystal structure of the oxide thermistor includes a cubic spinel phase 2 and a NaCl-type crystal phase 3, and the M represents at least one element selected from among Mg, Cr, Fe, Ni, Zn, Al and Ga. A method for manufacturing the oxide thermistor includes: a calcinating step for calcining a mixture in which Mn, Co, Cu, and M are mixed (where the M represents at least one element selected from among Mg, Cr, Fe, Ni, Zn, Al and Ga.); a molding step for molding the calcined mixture into a compact after the calcinating step; and a firing step for firing the compact and forming a sintered body, the firing step involving firing the compact at a temperature equal to or higher than the temperature at which the NaCl-type crystal phase precipitates, until the NaCl-type crystal phase precipitates.SELECTED DRAWING: Figure 1

This utility model relates to the field of thermal protectors, specifically a high-current dual-control delayed miniature thermal protector, comprising an insulating base, an insulating cover, a first pin, a second pin, and a bimetallic strip. The bimetallic strip has a moving contact. The insulating cover is fixed to the insulating base and encloses it. The first and second pins are embedded within the insulating base. The insulating base is characterized by having a conductive plate, a heating wire, and a PTC thermistor mounted on it. The conductive plate has a stationary contact that mates with the moving contact. One end of the heating wire is electrically connected to the conductive plate, and the other end is electrically connected to the second pin. One end of the PTC thermistor is electrically connected to the first pin, and the other end is electrically connected to the conductive plate. When in use, this thermal protector can more promptly disconnect the circuit when the electrical load current in the circuit abnormally increases, effectively protecting the electrical appliances and preventing damage.

The application provides a high-B-value linear NTC thermistor material with good batch consistency, a preparation method thereof and a thermistor element, relates to the technical field of NTC thermistor materials, and is characterized in that a NiO-ZnO binary oxide system is selected, ZnO is used as a main crystal phase, the conductive behavior and resistance-temperature characteristics of the material are controlled through a small amount of NiO, a NiO-ZnO linear NTC thermistor material directly physically compounded by NiO and ZnO is formed, the system composition is more simplified, the composite path is shorter, the phase composition is more easily controlled, the composition fluctuation and the organization non-uniformity caused by the complex second phase generation process, the insufficient local reaction or the uneven phase distribution can be reduced, and therefore the performance dispersion between different batches is reduced, and the consistency and the repeatability of the material preparation are improved.

The application discloses a blackbody-thermoelectric pile cooperative thermistor multi-temperature-point zero-point matching calibration method. The method utilizes the Seebeck effect of the thermoelectric pile, establishes the accurate corresponding relationship of the blackbody standard temperature-thermistor resistance value through zero-point matching, carries out dynamic temperature scanning on different calibration point temperatures of the cavity, and obtains the thermistor parameters of multiple temperature points. Finally, the accurate R-T curve is fitted through the least square method. The method innovatively calibrates the thermistor through the blackbody heat radiation mode. The method does not need to disassemble the instrument, does not damage the stability of the original system, can complete the rapid calibration of the instrument on site, effectively reduces the calibration cost, and guarantees the temperature calibration accuracy and the calibration effect.

A water heating device comprising a floating body 1, an associated heating element (21, Fig 3), a thermistor sensor 13 for sensing temperature of water surrounding the body, a means of calculating vol

The invention discloses a new energy automobile NTC sensor with an anti-corrosion structure, and belongs to the technical field of new energy automobile NTC sensors, and the new energy automobile NTC sensor is characterized in that the new energy automobile NTC sensor comprises a protection shell and a substrate, a thermistor is arranged in the substrate, and soldering tin blocks are arranged at the two ends of the thermistor; wherein one group of soldering tin blocks is connected with a metal probe through a wire A, the metal probe extends out of the protective shell, and the outer surface of the metal probe is coated with a protective layer, an electric telescopic rod is arranged in the protective shell, the telescopic end of the electric telescopic rod is connected with a smearing mechanism, and the smearing mechanism comprises a liquid storage tank. The metal probe has the advantages that new protection liquid is automatically supplemented at regular intervals, a dynamic protection layer is formed, weak links are continuously repaired, and therefore the long-term corrosion resistance of the metal probe is greatly improved, and the service life of the whole sensor is prolonged.

This utility model discloses a spring-loaded NTC temperature sensor for automotive coolant, relating to the field of sensor technology. It includes a brass housing, a connector plastic shell mounted on the top of the brass housing, a terminal mounted on the bottom of the connector plastic shell, a thermally conductive material injected into the inner wall of the bottom of the brass housing, an NTC thermistor connected inside the thermally conductive material, an encapsulation material covering the outer wall of the NTC thermistor, a connection between the top of the NTC thermistor and the bottom of the terminal, and a washer mounted on the top of the brass housing. In this utility model, the resistance leads, solder joints, and terminals are encapsulated to protect the strength of the resistance leads while meeting insulation, pressure resistance, moisture-proof, and waterproof requirements. The brass housing is very thin, and the bottom is filled with thermally conductive material, ensuring the sensor has a sensitive and fast response time, improving the safety and reliability of the coolant piping system.