678 results about "Thermal resistor" patented technology

The invention discloses a microwave cold noise source fusing TEC temperature control and noise temperature compensation technologies, and belongs to the technical field of microwave radiometer calibration. The device comprises a cold source module, a noise compensation module and a constant-temperature control module, wherein the cold source module generates a low-temperature noise signal through a field-effect tube and a terminal resistor; the noise compensation module detects environment temperature change in real time based on a thermistor and a Wheatstone bridge, drives a noise diode to generate a compensation signal, couples the compensation signal with a cold source noise signal after attenuation, and counteracts noise temperature deviation caused by the environment temperature. The constant temperature control module adopts a platinum resistance sensor and a PID algorithm to control a Peltier element in a closed-loop mode, and accurate adjustment (+ / -0.1 DEG C) is achieved. According to the invention, noise compensation and TEC negative feedback temperature control technologies are combined, so that the noise temperature of the system is stabilized in a range of + / -0.1 K for a long time, the measurement precision and reliability of the microwave radiometer in an outdoor complex environment are remarkably improved, and the method is suitable for scenes of remote sensing detection, unmanned aerial vehicle monitoring and the like.

The invention provides an acquisition circuit, a temperature acquisition method, a circuit system and electronic equipment. The acquisition circuit comprises a first signal acquisition port, a plurality of second signal acquisition ports, a first acquisition unit and a plurality of second acquisition units. Wherein the first acquisition unit comprises a value taking resistor and a first pull-up resistor, the first pull-up resistor is located in the chip, a first reference voltage is connected to a first end of the first pull-up resistor, and a second end of the first pull-up resistor is connected with a first end of the value taking resistor through a first signal acquisition port; the second acquisition unit comprises a second pull-up resistor and a thermistor, the second pull-up resistor is located in the chip, the first end of the second pull-up resistor is connected with the first reference voltage, and the second end of the second pull-up resistor is connected with the first end of the thermistor through a second signal acquisition port. Therefore, the acquisition circuit can realize voltage acquisition of one end of the thermistor by using a simple circuit, so that the acquisition circuit is low in cost and simple in wiring design.

The invention relates to the technical field of gas detection, in particular to a detection circuit based on an NTC thermistor and a heat conduction meter. The detection circuit based on the NTC thermistor comprises a main NTC thermistor which is suspended in air flow; the constant current source circuit is used for providing constant working current for the main NTC thermistor; the detection resistor is arranged between the main NTC thermistor and a ground node; the ADC sampling circuit is used for sampling analog voltages at two ends of the detection resistor into digital signals; the constant temperature adjusting circuit is used for controlling the magnitude of the current output by the constant current source circuit according to the voltage of the main NTC thermistor, so that the main NTC thermistor is kept at the target temperature; the temperature compensation circuit is used for detecting the temperature of the environment where the heat conduction measuring meter is located; and the processing unit is used for determining a detection result according to the digital signal and compensating the detection result according to the environment temperature. According to the detection circuit based on the NTC thermistor, the response speed and the measurement precision of measurement are improved.

The invention discloses a current-to-voltage conversion circuit structure for electroporation delivery. The current-to-voltage conversion circuit structure comprises a current-to-voltage conversion circuit and a voltage-to-pulse conversion circuit. The current-to-voltage circuit converts current signals into voltage through an input signal processing module, high-precision amplification is achieved through an operational amplifier and a feedback network of a signal amplification module, the driving capacity is enhanced through a transistor cascade circuit, and temperature drift is dynamically compensated in combination with a thermistor. The voltage-to-pulse circuit corrects non-linear errors through a resistance network of the linearization processing module, achieves gain adjustment through an operational amplifier and an adjustable resistor, and finally adapts to load changes through a field effect transistor and a negative feedback network. The circuit realizes high conversion precision, wide temperature range stability and load adaptive capability, and is suitable for high-precision scenes such as medical treatment or beauty electroporation, industrial sensing and the like.

The invention provides a battery equalization control method and device, electronic equipment and a storage medium, and is applied to a control chip in a battery equalization circuit, the battery equalization circuit further comprises a plurality of equalization thermistors with heating devices underlaid and equalization MOS tubes correspondingly connected with the equalization thermistors, and when a module cell is charged to a preset first voltage threshold value, the equalization thermistors are electrically connected with the equalization MOS tubes. Acquiring a cell voltage corresponding to each string of cells in the module, and determining a voltage difference value between a maximum value and a minimum value corresponding to the cell voltage; when the voltage difference value is greater than a preset first voltage difference threshold value, controlling the equalization MOS tube to be opened, and performing equalization discharging on the battery cell string with the battery cell voltage greater than a preset second voltage threshold value; and controlling a heating device which is connected with the target battery cell string with the maximum battery cell voltage and is padded below the equalization thermistor to work so as to reduce the resistance value of the equalization thermistor and increase the equalization discharge current corresponding to the target battery cell string. The current distribution of the single batteries can be dynamically adjusted by using the adjustable resistor, and efficient equalization is realized.

The utility model belongs to the technical field of new energy automobiles, and particularly discloses a new energy automobile high-pressure liquid heater which comprises a heater body, a thick film heating plate, a heat insulation plate, a cover plate and an overheating protection circuit which are sequentially installed from bottom to top. The overheating protection circuit comprises four thermistors Rt1, Rt2, Rt3 and Rt4, an N-type MOS tube, a relay KJ, a heating resistance wire Rh, a resistor R1, a resistor R2, a resistor R3, a low-voltage direct-current power supply and a high-voltage direct-current power supply. According to the thick film heating plate, the water-drop-shaped turbulent flow columns and the turbulent flow teeth are arranged, so that the heat conduction efficiency and the heat exchange efficiency of the thick film heating plate in liquid are improved, and better convective heat exchange is realized; and the overheating protection circuit is arranged, so that the reliability of the heater during over-temperature protection is improved, and the heater is not only controlled by software.

The present invention specifically relates to a variable-parameter satellite vibration isolator and an isolation method. The vibration isolator includes a thermistor, a metal shell, a resistance wire, a filling polymer, a connector, an upper fixed support, a heat insulation component, a lower fixed support and a wire; the filling polymer, the connector, the upper fixed support and the lower fixed support are all annular structures. The outer surface of the connector is connected to the inner wall of the upper fixed support. The outer wall of the upper fixed support is connected to the inner wall of the upper half of the filling polymer. The outer wall of the lower fixed support is connected to the inner wall of the lower half of the filling polymer. The inner wall of the lower fixed support and the bottom of the connector and the bottom of the upper half of the filling polymer enclose a bolt installation cavity. The outer wall of the filling polymer is provided with a metal shell. A resistance wire is wound around the outside of the metal shell. A heat insulation component is provided outside the resistance wire. The satellite control unit is connected to the thermistor and the resistance wire respectively through two wires.

The present invention discloses a design method for a thermal feedback mechanism energy conversion element chip, comprising at least the following steps: Step S1: preparing a substrate layer; Step S2: forming an insulating layer on the substrate layer; Step S3: placing an energy conversion element and at least one thermistor on the insulating layer; Step S4: establishing a parallel electrical connection between the energy conversion element and the thermistor; and Step S5: monolithically integrating the thermistor into a non-polar, two-terminal device. The thermistor is a thermally coupled resistive switch configured to assume a high-resistance or low-resistance state depending on its sensed temperature, with its high-resistance state resistance being much greater than that of the energy conversion element. The present invention eliminates heat accumulation in the energy conversion element chip through the monolithically integrated thermistor, significantly simplifying the complexity of the pyrotechnic device system and improving system reliability.

According to the invention, measurement errors caused by annual changes of a thermistor are reduced. A gas sensor (1) is provided with: a detection circuit (10) including thermistors (Rd1, Rd2); and a control circuit (20) that controls the connection relationship of the detection circuit (10) and the heater resistors (MH1, MH2). During a gas measurement operation, the control circuit (20) connects the thermistors (Rd1, Rd2) in series and heats the heater resistors (MH1, MH2), thereby generating an output signal (OUT) indicating the concentration of the gas to be measured on the basis of a detection signal appearing at a connection point between the thermistor (Rd1) and the thermistor (Rd2), and during a resistance measurement operation, generating an output signal (OUT) indicating the concentration of the gas to be measured on the basis of a detection signal appearing at a connection point between the thermistor (Rd1) and the thermistor (Rd2). The control circuit (20) measures the resistance value of the thermistor (Rd1) in a state where the series connection of the thermistors (Rd1, Rd2) is released. The control circuit (20) corrects the value of the output signal (OUT) on the basis of the resistance value of the thermistor (Rd1). As a result, measurement errors caused by annual changes in the thermistor are corrected.

A power tool includes a housing, an electric motor disposed within the housing, a first printed circuit board assembly configured to selectively supply electric current to the electric motor, causing the electric motor to activate and drive a tool element, and a battery receptacle configured to support a removable battery pack. The battery receptacle has a battery terminal block electrically connected to the battery pack to supply electrical current to the first printed circuit board assembly. The power tool further includes a second printed circuit board assembly electrically connected between the first printed circuit board assembly and the battery terminal block. The second printed circuit board assembly has a fuse and a thermistor configured to detect a temperature of the fuse.

The utility model provides a battery cell temperature acquisition structure, a battery and electric equipment, and relates to the technical field of batteries. The cell temperature acquisition structure is applied to the battery, the battery comprises at least one cell, and the cell temperature acquisition structure comprises a thermistor, a support frame, a flexible circuit board and a heat conduction assembly. The supporting frame comprises a fixing frame, the fixing frame sleeves the thermistor, the fixing frame and the thermistor are fixed on one side, deviating from the heat conduction assembly, of the flexible circuit board, and one side, deviating from the flexible circuit board, of the supporting frame is directly or indirectly connected with the first position of the battery cell. The heat conduction assembly is fixed to the side, facing the second position of the battery cell, of the flexible circuit board, the heat conduction assembly is connected with the flexible circuit board and the battery cell, and the first position and the second position are spaced. According to the battery cell temperature acquisition structure provided by the embodiment of the invention, the connection reliability between the battery cell temperature acquisition structure and the battery cell can be improved, and the possibility of damage and failure of the thermistor caused by unstable temperature acquisition is reduced.

The invention provides a three-phase low-voltage MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) packaging integrated power module. A driving assembly, a direct-current bus capacitor and other modules are integrated in an aluminum shell package. The three DBC substrates respectively bear U-phase bridge arms, V-phase bridge arms and W-phase bridge arms, an upper bridge arm and a lower bridge arm of each phase are formed by a plurality of parallel MOSFET chips, drain electrodes of the chips are directly welded to a DBC upper copper layer, grid electrodes of the chips are connected with an upper-layer driving circuit board through copper columns, source electrodes of the chips are led out to a direct-current input terminal or an alternating-current output terminal through bonding wires, and a double-layer conductive structure is formed. A plurality of direct-current bus capacitors which are arranged above the aluminum shell in parallel are adjacently coupled with the DBC substrate, so that low-impedance energy buffering is realized; the alternating current output terminal is sleeved on the current sensor, detects the phase current and outputs the phase current through the signal terminal; and a thermistor is mounted on a copper layer on each DBC to monitor the junction temperature of the chip and provide over-temperature protection. The direct-current input terminal, the alternating-current output terminal, the power terminal and the signal terminal are integrally embedded in the aluminum shell and are directly butted with an external busbar and a controller, and additional sampling and driving boards are not needed.

The invention discloses a large-bore high-density joint motor for a humanoid robot, which comprises a stator and a rotor, and is characterized in that the rotor comprises a hollow shaft and magnetic steel surface-mounted on the outer wall of the hollow shaft; the stator comprises a stator core outside the magnetic steel, insulating end plates are arranged at the two ends of the stator core, windings are arranged at the outer ends of the insulating end plates, a leading-out wire is arranged at the outer end of one winding, a thermal resistor is arranged on the winding, and a temperature sensor of the thermal resistor is embedded in the winding; by arranging the thermal resistor on the winding, the temperature can be monitored at any time, so that the load of the motor can be adjusted according to the monitored temperature, the influence on normal operation caused by overhigh temperature rise of the motor is prevented, the diameter of the rotor is increased and the crack ratio is increased by arranging the inner cavity of the hollow shaft into a large inner hole structure and matching the pole slots of the stator and the rotor to adopt 18 slots and 20 poles, and the reliability of the motor is improved. The magnetic conduction thickness of the hollow shaft can be reduced by selecting multiple poles, and the purpose of reducing the weight of the hollow shaft is achieved.

The thermosensitive crystal resonator comprises a base, a quartz wafer and a thermistor, the base comprises a base bottom plate, a base middle plate and a base wall which are sequentially arranged from bottom to top, an inner cavity is defined by the upper end face of the base middle plate and the inner wall of the base wall, an upper end opening of the inner cavity is sealed through an upper cover, and a lower end opening of the inner cavity is sealed through a lower cover. A center through hole is longitudinally formed in the middle of the upper end face of the base middle plate, a thermistor is installed in the center through hole, side edge through holes are formed in the positions, located on the two sides of the center through hole, of the upper end of the base middle plate respectively, embedded blocks are installed in the side edge through holes, a plurality of honeycomb holes are formed in the upper portions of the embedded blocks, and the honeycomb holes are filled with conductive buffer rubber. And the upper ends of the two embedded blocks are connected with a quartz wafer through conductive silver adhesive. By optimizing multiple designs of the base structure, the honeycomb buffer structure, the close-range thermosensitive compensation arrangement structure and the double-sealing structure, temperature compensation precision, stress buffer high efficiency and sealing performance long-term performance are achieved.

The utility model relates to the technical field of new energy batteries, in particular to a CCS integrated busbar integrated with a low-voltage BMS, which comprises a plastic support, an aluminum bar, a circuit board, a connector and a thermistor, a bonding pad of the circuit board is electrically connected with the aluminum bar through welding, the thermistor is electrically connected with the circuit board through welding, and the thermistor is in contact with the aluminum bar; the LED lamp further comprises a low-voltage BMS, the low-voltage BMS is integrated on the circuit board and electrically connected with the circuit board, and the circuit board is electrically connected with an external high-voltage BMS through a connector. According to the scheme, the low-voltage BMS is directly integrated into the front-end signal acquisition circuit board, so that the integration level of the device is improved, the assembly space is saved, and the cost is saved.

The invention provides a motor driver and a heat dissipation system thereof. The motor driver comprises a driving board, and the driving board is provided with a motor driving circuit, a temperature detection circuit, a power supply circuit and a main control chip. The power supply circuit is connected with the motor driving circuit and the main control chip and provides a working power supply; the motor driving circuit comprises a driving chip and MOS tubes, the input end of the driving chip is connected with the PWM output end of the main control chip, the output end of the driving chip is connected with the grid electrodes of the MOS tubes, and the drain electrode of the lower MOS tube and the source electrode of the upper MOS tube are connected into a motor three-phase driving loop; the temperature detection circuit comprises a thermistor which is arranged on the driving board and is connected in series with the fixed resistor to form a voltage division circuit, and a voltage division node is connected to an ADC interface of the main control chip; the main control chip collects voltage values at the two ends of the thermistor through the ADC interface and calculates a temperature value according to the collected voltage values; and when the temperature value exceeds a set threshold value, the main control chip stops outputting the PWM signal to the driving chip so that the motor stops rotating.

The invention relates to the technical field of detection circuits suitable for various electricity utilization information acquisition terminals, and discloses a detection circuit method suitable for various electricity utilization information acquisition terminals. The method comprises the following steps: setting an environment temperature, calibrating a shunt resistor and a thermistor, constructing a three-order resistance-temperature mapping relation, and calculating thermal resistance and thermal response characteristics to realize accurate modeling; a thermistor is attached to a shunt resistor, heat-conducting silicone grease is added to form a thermal coupling structure, voltage is collected through a constant current source and a differential amplifier, a resistance value is converted into temperature in real time, instantaneous current is inversely calculated based on a heat balance equation, then energy integration and grade judgment is completed, and various electrical parameter indexes are output. According to the method, modeling, collection, conversion and inversion processes are integrated, a complete thermal-electric detection link is constructed, a traditional current sensor is not needed, and the method has the advantages of being compact in structure, low in cost, flexible in deployment and the like and is suitable for a low-power-consumption distributed terminal.

The invention relates to a novel semiconductor power device with a built-in gate resistor structure and a preparation method of the novel semiconductor power device. The active region of the semiconductor substrate is provided with a grid electrode electrolyte layer, the grid electrode electrolyte layer is provided with a polycrystalline silicon layer, the polycrystalline silicon layer is provided with first through holes, each first through hole is provided with a temperature coefficient thermistor, the temperature coefficient thermistors extend out of the first through holes, the polycrystalline silicon layer and the temperature coefficient thermistors are provided with interlayer dielectric layers, and the interlayer dielectric layers are arranged between the polycrystalline silicon layer and the temperature coefficient thermistors. The interlayer dielectric layer is provided with a second through hole and a third through hole, the second through hole is filled with a first metal layer, the third through hole is filled with a second metal layer, the interlayer dielectric layer is provided with a grid electrode bonding pad and a grid electrode flow channel, and the grid electrode bonding pad, the grid electrode flow channel and the interlayer dielectric layer are provided with passivation layers. The novel semiconductor power device with the built-in gate resistor structure is designed to solve the technical problem that an existing semiconductor power device with the built-in gate resistor structure is high in loss at a high temperature.

The invention discloses a self-recognition fault diagnosis method of a thermal resistor and the thermal resistor, and relates to the technical field of thermal resistors. The invention relates to a self-diagnosis thermal resistor with a double-RTD redundant structure, a built-in film heater and a phase change reference module and a fault detection method of the self-diagnosis thermal resistor. Through constant current excitation and step self-heating response, whether drift, slow response, thermal inertia change, open circuit or short circuit faults occur to the sensor can be identified on line. And when the temperature rises to the reference phase change point, self-calibration is automatically triggered, and the zero point deviation is corrected. Redundancy automatic switching is supported, fault codes are output, and shutdown is avoided. The system is suitable for high-reliability temperature measurement occasions, and has the advantages of high stability, self-diagnosis capability and maintenance convenience.

The invention discloses a temperature compensation circuit adaptive to a wide-temperature scene and a compensation method thereof, and the circuit comprises a first temperature compensation network which comprises a first divider resistor, a first thermosensitive branch circuit and a first switch element which are connected in series; the second temperature compensation network comprises a second divider resistor, a second thermosensitive branch and a second switch element which are connected in series, and the resistance value of the first thermistor is smaller than that of the second thermistor; the control unit is connected with the first temperature compensation network and the second temperature compensation network, and is used for collecting a partial pressure value of a thermosensitive branch in the currently started temperature compensation network, and determining a temperature value of a thermistor in the current temperature compensation network based on the partial pressure value; the temperature value is compared with the preset temperature compensation interval, the temperature compensation network matched with the current temperature value is started to carry out temperature compensation on output of the sensor, the temperature compensation network can be flexibly switched, accurate temperature compensation is carried out by being matched with a wide-temperature scene, and stable output of the sensor is ensured.

The invention relates to the technical field of automobile lamps, in particular to an automobile lamp function fault intelligent compensation circuit structure which comprises a microprocessor (1), an LED driver (2), a current limiting resistor (3), an LED lamp (4), a thermistor (5), an MOS tube (6) and a precise sampling resistor (7), and discloses an automobile lamp function fault intelligent compensation circuit control method which comprises state sensing, intelligent decision making and dynamic execution. The method is novel in conception, scientific in design and safe and reliable to use, and intelligently improves the driving power of the remaining normal LED lamps (4) after the fault of the LED lamps (4) is recognized by monitoring the branch states of the LEDs (4) in real time, so that the total light output is maintained to be close to the initial level, and the driving safety and the regulation conformity are guaranteed.

The invention relates to a liquid flow detection system based on a thin film thermistor, and the system comprises a pipeline which is used for conveying to-be-detected liquid; the sensor body is mounted on the pipe wall of the pipeline; the inductive probe is arranged at the bottom of the sensor body and extends into a flow channel of the pipeline, the inductive probe comprises a heating resistor serving as a heating element and a temperature measuring resistor serving as a temperature measuring element, and the temperature measuring resistor is located at the downstream of the heating resistor; and the signal processing circuit board is arranged inside or outside the sensor body, is electrically connected with the heating resistor and the temperature measuring resistor, and is used for collecting and processing temperature signals. According to the invention, the MEMS film thermistor is utilized, the thermal capacity is small, the response is fast, and the fault of a traditional thermal sensor is broken through; according to the method, the thermal saturation bottleneck of a small flow area with the flow rate of 1 [mu] L / min is overcome, and a delta T / delta t composite algorithm model is introduced, so that the linearity and the sensitivity of the low flow area are effectively expanded, and the flow measurement with the precision of nL / min to [mu] L / min is realized.

A temperature measuring device according to an embodiment of the present invention comprises: a power input unit; a thermistor electrically connected to the power input unit; a first resistor connected in series with the thermistor; and a second resistor connected in parallel with the thermistor.

The invention discloses a battery pack with a flame detection function. The battery pack comprises a plurality of battery cells and an acquisition board, the acquisition board is connected with the plurality of battery cells and is integrated with a detection circuit; the acquisition board is provided with a flame sensor and a temperature sensor corresponding to the positions of each battery cell pole, and is provided with a safety valve sensor corresponding to the position of each battery cell safety valve; the detection circuit comprises a battery acquisition chip, and a plurality of acquisition channels of the battery acquisition chip are connected with a plurality of detection branches; each detection branch comprises a flame sensor and a safety valve sensor, and the flame sensor and the safety valve sensor are connected with a common resistor in parallel and then connected with a thermistor in series. Through the above arrangement, the detection efficiency and reliability of the battery pack are higher.

This invention provides a battery heating system and method for an electric vehicle superstructure, relating to the field of battery preheating technology. The system includes: an electric vehicle superstructure comprising a drive motor controller, a generator, a generator controller, a DC-DC converter, a low-voltage battery, a power battery, a hybrid controller, an integrated capacitor, a superstructure load, and a drive motor; the generator is connected to the vehicle chassis engine; the power battery has a built-in battery distribution module; the battery management unit includes a positive contactor, an integrated capacitor, a negative contactor, and a charge / discharge current meter connected in series, wherein a resistor R1 and a pre-charge contactor are connected in parallel to the positive contactor, and the drive motor controller and the generator controller are connected in parallel to the integrated capacitor; the battery management unit also includes a heating contactor, a heating current meter, and a PTC thermistor pair connected in series, wherein the heating contactor is connected to the positive terminal of the power battery, and the PTC thermistor pair is connected to the negative contactor.

The invention provides a temperature measurement circuit, and belongs to the technical field of detection, the temperature measurement circuit comprises a first voltage division measurement circuit and a second voltage division measurement circuit, the output end of the first voltage division measurement circuit is connected to the input end of a first amplification circuit; the output end of the second partial pressure measuring circuit is connected to the input end of the second amplifying circuit; the output end of the first amplification circuit and the output end of the second amplification circuit are respectively connected to two channels of the AD sampling chip, and the output end of the AD sampling chip is connected to the signal processor; the signal processor is used for acquiring a first voltage output by the first amplifying circuit and a second voltage output by the second amplifying circuit; determining the resistance value of the thermistor at the current moment based on the voltage difference between the first voltage and the second voltage and the theoretical partial voltage value of the second resistor; and determining the temperature at the current moment based on the resistance value of the thermistor at the current moment. According to the temperature measurement circuit provided by the invention, the measurement precision of the temperature measurement circuit can be improved.

The utility model relates to the technical field of energy storage devices, in particular to a battery energy storage device structural component which comprises a first pole output, a second pole post, an insulating component and a first heat-resistant insulating tube, a through hole is formed in the first pole output, and the middle connecting part of the second pole post is partially inserted into the through hole. The insulating assembly sleeves the middle connecting part and is partially clamped between the middle connecting part and the inner wall of the through hole. The middle connecting part is sleeved with the first heat-resistant insulating tube, the first heat-resistant insulating tube is clamped between the middle connecting part and the insulating assembly, and the first heat-resistant insulating tube is made of an organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating tube has an insulating effect when the battery energy storage device is in thermal runaway. The utility model further provides a battery energy storage device which comprises the battery energy storage device structural assembly, and the first pole output is a shell or a top cover plate. According to the battery energy storage device structure assembly and the battery energy storage device, short circuit of positive electrode output and negative electrode output during thermal runaway can be avoided.

The utility model relates to the technical field of thermistors, and discloses a high-corrosion-resistance thermistor which comprises a resistor body, a lead is arranged on the lower surface of the resistor body, a protective shell is arranged on the side wall of the resistor body, a sealing cover is arranged on the lower surface of the resistor body, and a fixing assembly is arranged on the side wall of the sealing cover. A sealing assembly is arranged on the upper surface of the sealing cover, the fixing assembly comprises a fixing block, the side wall of the fixing block is fixedly connected to the side wall of the sealing cover, a clamping sleeve is fixedly connected to the side wall of the protective shell, a first clamping groove is formed in the clamping sleeve, an elastic plate is fixedly connected to the upper surface of the fixing block, and a clamping block is fixedly connected to the side wall of the elastic plate. The sealing assembly comprises a mounting block, and the side wall of the mounting block is fixedly connected to the upper surface of the sealing cover. According to the utility model, the elastic plate slides into the clamping sleeve, so that the clamping block is clamped with the clamping groove I, the fixing effect is achieved, and the practicability of the equipment is improved through the structure.

The present invention discloses a gas chamber temperature control method for a SERF inertial measurement device based on second harmonic generation. The method utilizes gas chamber optical depth information obtained by the SERF device's own detection system to perform feedback regulation on the laser heating power of the atomic gas chamber, thereby achieving real-time and stable control of the atomic density or temperature in the gas chamber. This avoids the magnetic field interference introduced by the use of thermal resistors as temperature sensors in existing solutions, thereby achieving truly non-magnetic, all-optical gas chamber heating and its control system, and helping to improve the sensitivity of the SERF inertial measurement device.

The present application provides an LED control system, including an LED driver chip, a thermistor independent of the LED driver chip, and a matching resistor of the thermistor, wherein different thermistors correspond to different matching resistors; the LED driver chip and the matching resistor are configured to generate corresponding LED control targets according to different thermistors; wherein the upper and lower limits of the control targets are preset by the LED driver chip regardless of the thermistor; and the slope of the change of control target over the change of temperature is fitted with the slope of the change of thermistor resistance over the change of temperature, and the upper and lower limits of the control target remains the same for different choices of thermistors. The present application also provides a corresponding LED control method.