1597 results about "Thermistor" patented technology

The invention relates to a PCB over-temperature protection device, method and equipment, and relates to the technical field of servers, the device comprises at least one control circuit and a complex programmable logic device CPLD, and the control circuit comprises a thermistor and at least one voltage comparator; the thermistor is arranged in a monitoring area of a printed circuit board (PCB) and is used for converting the temperature of the monitoring area into a target voltage signal; the forward input end of the voltage comparator receives a target voltage signal, the reverse input end of the voltage comparator receives a reference voltage signal corresponding to the voltage comparator, and the voltage comparator is used for outputting a high level when the target voltage signal is higher than the reference voltage signal; the CPLD comprises a plurality of input pins respectively corresponding to the voltage comparators, each input pin is electrically connected with the output end of the corresponding voltage comparator, and the CPLD is used for triggering over-temperature protection operation corresponding to the input pin when the high level is received through the input pin, so that the timeliness of PCB over-temperature protection is improved.

The invention discloses a temperature and pressure sensor and a manufacturing method thereof, the temperature and pressure sensor comprises a support assembly formed by an inner support and a thermistor through an injection molding process, two pin copper wires of the thermistor are welded to an insertion piece of the inner support, and a plastic supporting structure wrapping the thermistor and the inner support is formed through injection molding; one end of a PIN needle of the terminal button is connected with an external plugging port; one end of a conductive circuit of the flexible wire board is respectively welded with the PIN of the ceramic capacitor and the insertion piece of the inner bracket, and the other end of the conductive circuit of the flexible wire board is welded with the other end of the PIN of the terminal button; a through hole is formed between the support assembly and the shell, a medium makes contact with the ceramic capacitor through the through hole, the ceramic capacitor transmits a pressure signal to the outside through the flexible wire board and the end button, the thermistor senses the temperature of the medium through the plastic supporting structure, and a temperature signal is transmitted to the outside through the inserting piece, the flexible wire board and the end button. The thermistor is effectively prevented from losing efficacy due to medium impact, and meanwhile, the structural process is relatively simple and easy to assemble.

The utility model discloses a temperature and pressure sensor for a new refrigerant, which comprises a shell with a built-in pressure sensing component, the shell is externally connected with an electric appliance connector connected with the pressure sensing component, and the shell is internally provided with an NTC (Negative Temperature Coefficient) thermistor connected with the pressure sensing component; the pressure sensing component is a five-pin ceramic capacitor, two pins of the five-pin ceramic capacitor are temperature measuring pin bodies which penetrate through a ceramic capacitor body and are connected with the NTC thermistor, and a pressure-resistant protective ring which surrounds the temperature measuring pin bodies is arranged between the pressure sensing component and the shell in an extruding manner. According to the utility model, the five-pin ceramic capacitor is used as a pressure sensing component, two pins for temperature measurement are designed to be of a straight-through type structure, and the withstand voltage protection ring with a double-ring-layer withstand voltage protection structure is arranged, so that the withstand voltage capability of the temperature and pressure sensor is improved.

The application relates to a linear NTC thermistor material LaMnO3-Al2O3 and a preparation method thereof, and belongs to the technical field of NTC thermistor materials. The linear NTC thermistor material LaMnO3-Al2O3 is composed of a Mn-based perovskite LaMnO3 and Al2O3, and the mole fraction of the Al2O3 accounts for 10-30% of the total mole fraction of the system. The material is prepared by ball milling, drying, sieving, pressing and sintering of the Mn-based perovskite LaMnO3 and the Al2O3. The NTC thermistor material LaMnO3-Al2O3 has a linear resistance-temperature characteristic in the range of 30 DEG C-65 DEG C, and the linearity reaches more than 99.6%. The linear NTC thermistor material can make the working circuit more simple and the whole system operation more simple and reliable.

The invention relates to the technical field of thermistor temperature measurement, in particular to a temperature measurement detection device for a thermistor, which comprises a substrate and a handpiece, a to-be-measured resistor is mounted on the outer side wall of the substrate, an inner cylinder is fixedly connected to the end part of the handpiece, a top magnetic block is fixedly connected to the interior of the inner cylinder, and a top magnetic block is fixedly connected to the top magnetic block. A probe switching mechanism is arranged in the inner cylinder and comprises a rotating rod rotationally connected into the inner cylinder, a gear is fixedly connected to the outer side wall of the rotating rod, a push rod is slidably connected to the inner cylinder, and a rack is arranged at the end of the push rod. When an operator presses down the handheld piece, the swing arm can synchronously drive the two cleaning pieces to move towards the two sides, the cleaning brush directly cleans the surface of the resistor to be measured, extra manual cleaning is not needed, obstruction of dust residues to heat conduction is effectively avoided, and a precise foundation is laid for subsequent temperature measurement.

The invention discloses a flexible DC converter valve DC support capacitor temperature on-line monitoring method and system. The method comprises the steps of obtaining operation data of a thermistor arranged on a target capacitor wiring terminal; processing the operation data to obtain external temperature data of the target capacitor; constructing a thermal network model of the target capacitor based on the structure data and the material data of the target capacitor; performing optimization processing on the thermal network model through internal temperature data of the target capacitor acquired by the thermocouple to obtain an equivalent thermal resistance and thermal capacitance network model; inputting the obtained real-time current data of the target capacitor into the equivalent thermal resistance and thermal capacitance network model for processing to obtain internal temperature rise data of the target capacitor; and fusing the external temperature data and the internal temperature rise data to realize real-time monitoring of the temperature of the target capacitor according to a fused result. According to the method provided by the invention, real-time monitoring and accurate evaluation of the temperature of the capacitor are realized.

The invention provides a heat collecting coil temperature adjusting device and a control method thereof, and relates to the field of temperature adjusting equipment, and the heat collecting coil temperature adjusting device comprises a temperature sensor, a controller, a heating module and a cooling module. The temperature sensor is installed at a key temperature measuring point of the heat collecting coil, the measuring precision is + / -0.1 DEG C, and data are collected according to the characteristics of a thermistor and wirelessly transmitted to the controller. The controller receives the data, calculates deviation and change rate according to a preset target, and obtains a control quantity by using a fuzzy adaptive control algorithm; the heating module adjusts current according to control quantity to change power temperature rise, and the cooling module adjusts rotating speed of a water pump to control flow speed temperature reduction. The control method comprises the steps of target presetting, data acquisition and transmission, deviation and fuzzy control quantity calculation, temperature adjustment, parameter adjustment and the like, fuzzy control rule parameters are optimized through a genetic algorithm, and the problems that an existing device is insufficient in precision, complex in structure, inflexible in control strategy and the like are solved.

The invention discloses a small generator, and relates to the technical field of generators. The motor comprises a shell, double-end heat dissipation ventilation holes, a permanent magnet shielding rotor and a temperature control torsion limiting protection assembly. The grooves in the periphery of the rotor and the built-in paddles construct through airflow during rotation, so that self-dispersing heat dissipation is realized; coil temperature rise triggers a triode through a thermistor to drive a protection electromagnet, torque transmission of a fluted disc friction coupling is adjusted, and continuous derating can be achieved until zero-coupling shutdown is achieved; the permanent magnet adjusting assembly rapidly cuts off magnetic field output through an iron shell-aluminum strip-permanent magnet combination and an electromagnetic locking mechanism, and it is guaranteed that no induced voltage exists in the overhaul period.

The invention relates to the technical field of electronic paste, in particular to copper electrode paste for an NTC thermistor and a preparation method and application of the copper electrode paste. A copper electrode slurry for an NTC thermistor comprises copper powder, an inorganic glass binder, an organic carrier and a dispersant, the inorganic glass binder comprises CuO and NiO, and the organic carrier comprises a polymer thickener. The copper electrode slurry can be coated on the surface of an NTC thermistor ceramic substrate through a silk-screen printing method, can be used as a metallized conductive layer after being sintered in nitrogen, is used for temperature measurement, temperature compensation, temperature control components and the like, and is wide in application. The copper electrode slurry for the NTC thermistor provided by the invention can be sintered in nitrogen at 550-650 DEG C, and has the advantages of wide sintering interval, good sintering appearance, excellent welding performance and strong adhesive force. After sintering, the ohmic contact is good, so that the prepared NTC thermistor can truly reflect the resistance value of a substrate, and the phenomenon of ion migration is avoided.

The invention relates to the technical field of automobile heat management, in particular to a multi-loop integrated heat management system and method for an electric automobile. Comprising a first electronic water pump, a second electronic water pump, a refrigerating device, a first temperature sensor, a second temperature sensor, a pressure sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a first pressure temperature sensor, a second pressure temperature sensor, a first electronic expansion valve, a second electronic expansion valve, an evaporator, a fan and a compressor. According to the system, on the basis of an existing whole vehicle air conditioning system, an air-cooled condenser is replaced with the water-cooled condenser, a three-way valve, an integrated battery, the motor, the controller of the motor and a passenger compartment heat management system are removed, the motor is comprehensively utilized for preheating, the energy utilization rate is increased, and the energy consumption is reduced. The endurance mileage of the whole vehicle is improved, and the complexity of the system is reduced.

The invention provides a lithium ion battery control method and device based on temperature regulation and control, and relates to the field of data processing. The method comprises the following steps: acquiring temperature measurement data sent by a thermistor and an infrared temperature sensor for a lithium ion battery; performing data processing on the temperature measurement data to obtain current temperature data; inputting the current temperature data into a preset neural network model to generate predicted temperature data; acquiring temperature error data of the lithium ion battery; generating a temperature regulation and control mechanism according to the predicted temperature data and the temperature error data; and controlling a temperature control assembly corresponding to the lithium ion battery to carry out temperature regulation and control according to the temperature regulation and control mechanism. By implementing the technical scheme provided by the invention, the temperature of the lithium ion battery can be conveniently and accurately regulated and controlled.

A connector for connecting a NTC (negative temperature coefficient) thermistor is disclosed. The connector comprises an insulating body and a conductive terminal. The insulating body has a receiving hole therein. The conductive terminal has a connecting portion extending outward. The connecting portion extends out of the insulating body. The connecting portion has a recess for a NTC thermistor to be embedded and attached to the recess, such that the NTC thermistor can detect the temperature inside the connector in time. Thus, the power can be cut off in time to avoid irreversible consequences of fire, and the NTC thermistor can be mounted and operated more easily.

The invention discloses a power type negative temperature coefficient thermistor and method for suppressing surge current, and relates to the technical field of negative temperature coefficient thermistors, the thermistor comprises a core body and pins, the pins are respectively arranged on electrodes on two sides of the core body by adopting a multi-contact-surface structure, and the pins are arranged on the two sides of the core body. The core body is made of a Mn-Co-Ni-La oxide with a nano composite gradient structure; the Mn-Co-Ni-La oxide with the nano-composite gradient structure determines the upper limits of core capabilities such as surge suppression, wide temperature stability and low power consumption of the thermistor, and the redesign of the pin is the key of performance transfer, so that the electrical properties (low contact resistance and high surge tolerance) of the Mn-Co-Ni-La oxide with the nano-composite gradient structure are not counteracted by structural defects; the arrangement of the bracket prevents the Mn-Co-Ni-La oxide with the nano-composite gradient structure from losing the effect due to heat accumulation and physical damage through thermal management and mechanical protection, and the three components supplement one another and cooperate with one another, so that the performance of the thermistor of the Mn-Co-Ni-La oxide with the nano-composite gradient structure is guaranteed.

The embodiment of the invention provides a temperature detection circuit and method and electronic equipment, and the circuit comprises a temperature detection module which comprises a detection capacitor; the detection capacitor is used for generating a corresponding capacitance value according to the internal temperature of the electronic equipment; the conversion module is connected with the detection capacitor, and the conversion module is used for controlling the detection capacitor to charge and discharge repeatedly under the corresponding capacitance value and outputting a square wave signal according to the charge and discharge state; and the control module is connected with the conversion module and is used for acquiring the corresponding internal temperature according to the square wave signal. According to the electronic equipment, the detection capacitor is used for replacing a thermistor or a temperature sensor in an existing scheme to detect the temperature of the electronic equipment, and the detection capacitor has a direct current blocking effect, so that quiescent current cannot be generated, and the effect of reducing static power consumption can be achieved.

The invention discloses a semiconductor laser double-layer temperature control system, which is characterized in that firstly, digital PID temperature control is carried out on an external heat sink of a laser, the set voltage of an outer thermistor and an outer slide rheostat is converted by an ADC conversion circuit and then is sent to an STM32, and control information is sent to a DAC conversion circuit after digital PID operation; and the DAC conversion circuit outputs a control signal to a CTLI pin of the MAX1978 after analog-to-digital conversion, and generates a driving current to control an outer TEC, thereby realizing coarse stabilization of the external temperature of the laser. The inner layer adopts a simulation PID control mode, an inner layer MAX1978 chip reads voltage values of a thermistor and a slide rheostat in the laser and then carries out simulation PID network operation, current is output to drive a TEC in the laser, and therefore high-stability temperature control of the laser is achieved.

The invention relates to the technical field of lasers, and discloses a laser temperature adjusting method and device, and the method comprises the steps: determining a second thermistor temperature based on a predetermined temperature compensation coefficient, a first environment temperature, a second environment temperature and a first thermistor temperature, the temperature of the thermistor at the second environment temperature is adjusted to be the second thermistor temperature; wherein the process of predetermining the temperature compensation coefficient comprises the following steps: carrying out a wavelength change test on the laser chip at a first preset temperature and within a preset current range, and determining wavelength change data corresponding to the laser chip; and calculating according to the first relation of the laser chip wavelength along with the change of the environment temperature, the wavelength change data, the temperature tuning coefficient and the test environment temperature change data to obtain a temperature compensation coefficient. Therefore, a temperature compensation coefficient is introduced to counteract the influence of ambient temperature fluctuation on the actual temperature of the laser chip, and the output wavelength stability of the laser is effectively improved.

The utility model particularly relates to a tile-shaped heating device, which comprises a tile-shaped heating sheet body, an NTC (Negative Temperature Coefficient) thermistor and a lead, the tile-shaped heating sheet body comprises a tile-shaped ceramic outer layer, a tile-shaped ceramic inner layer and a circuit layer, and the circuit layer is arranged between the tile-shaped ceramic outer layer and the tile-shaped ceramic inner layer; the lead is arranged at one end of the tile-shaped ceramic outer layer and is connected with the line leading-out end; and the NTC thermistor is arranged on the outer side surface of the tile-shaped ceramic outer layer. The tile-shaped ceramic inner layer can be well attached to the surface of the battery, so that the tile-shaped heating sheet body is high in heating efficiency, efficient and energy-saving; the lead is arranged on the tile-shaped ceramic outer layer, so that the connection with an external power supply is facilitated, and the fitting degree between the tile-shaped ceramic inner layer and the battery is not influenced; the NTC thermistor is arranged on the outer surface of the tile-shaped ceramic heating sheet body, temperature sensing is more accurate, temperature feedback of a compensating circuit is more accurate and rapid, real-time temperature can be effectively fed back, external temperature control equipment can conduct temperature control according to the fed-back actual temperature, and using is safer and more reliable.

A nonlinear crystal flexible clamping and temperature control device comprises a clamping seat, a top face clamping block, a side face clamping block, a stud, a compression spring, a nut, a window mirror pressing ring, a wave spring, a window mirror gasket, a window mirror, a window mirror limiting block, a nonlinear crystal, silicon rubber, a thermistor and a ceramic heating piece. The flexible clamping device exerts pre-tightening force on the nonlinear crystal in the horizontal direction and the vertical direction through the compression spring, and meanwhile flexible clamping of the nonlinear crystal is achieved in a silicone rubber dispensing fixing mode. The temperature control device achieves accurate control over the temperature of the nonlinear crystal in the mode that a thermistor collects temperature signals and a ceramic heating piece heats a clamping base. The flexible clamping and temperature control device disclosed by the invention has the characteristics of performing thermal expansion compensation on the nonlinear crystal, being high in mechanical resistance and temperature control precision, uniform in crystal heat distribution and the like.

The invention discloses a thermistor mounting method and related equipment. The thermistor mounting method comprises the following steps: applying micro-power alternating bias excitation to a thermistor to obtain cold-state thermal resistance reference data; mounting a thermistor on the surface of the solder paste, collecting real-time resistance data in a temperature rise process, and performing normalized difference according to cold-state thermal resistance reference data to obtain a normalized dynamic resistance curve; performing derivative continuity and extreme value distribution analysis on the curve to obtain a wetting connectivity index; when the wetting connectivity index reaches a preset threshold value, executing second-order extreme value spacing analysis to obtain interface heat flux density distribution, calculating an interface thermal resistance dispersion vector field, and adjusting the transmission chain speed and furnace chamber airflow parameters according to the interface thermal resistance dispersion vector field; and a backtracking dynamic resistance curve is obtained in the cooling process, and the backtracking dynamic resistance curve and the standardized dynamic resistance curve are differentiated to obtain a curing quality factor. According to the invention, real-time identification in a defect germination stage and instant correction in a solder solidification window stage in a thermistor mounting process can be realized, and the mounting quality and reliability are improved.

The invention belongs to the related technical field of flexible sensors, and discloses a flexible sensor capable of simultaneously monitoring temperature and pressure and a preparation method thereof, and the flexible sensor sequentially comprises an upper electrode, a flexible dielectric layer with a spatial ordered multistage microstructure, a thin film thermistor and a lower electrode. The flexible dielectric layer with the spatially ordered multistage microstructure is composed of a flexible polymer and comprises a first-stage microstructure and a second-stage microstructure which are orderly arranged on a plane. When pressed by an object, the pressure can be monitored through the capacitance change of the sensor and the temperature can be monitored through the resistance change of the thin film thermistor. The spatial ordered multistage microstructure of the flexible sensor can effectively improve the sensitivity and the measuring range of the sensor.

The invention belongs to the technical field of connectors, and particularly relates to a multifunctional intelligent connector, which comprises a plastic shell, and is characterized in that the plastic shell is internally provided with a cavity A, a cavity B and a through hole I for communicating the cavity A with the cavity B; the contact element group is assembled in the cavity A; the thermistor module is assembled in the cavity A; the fuse module is assembled in the cavity B and comprises a fuse, and a contact surface I and a contact surface II are arranged on the fuse; and a fuse fixing module. According to the multifunctional intelligent connector in the technical scheme, the thermistor module is additionally arranged to intelligently collect and feed back heat generated when the connector is powered on, the function of monitoring the temperature of the connector is achieved, the fuse module is additionally arranged on the basis of the thermistor module, a fuse is disconnected when the connector is overloaded, and the temperature of the connector is monitored. The function of overload protection on the connector is realized, so that the connector in the technical scheme has double functions of temperature monitoring and overload protection.

The utility model relates to a bonding tool for an inflatable sealing ring of a stern shaft sealing device, which is characterized in that a liner is arranged in an inner cavity of the inflatable sealing ring before the inflatable sealing ring is bonded, the inflatable sealing ring is fixedly supported, the section to be bonded of the inflatable sealing ring is attached to the inner contour of a clamping plate, and the lower part of the liner is fixedly connected to a bottom plate; clamping plates are fixedly connected to the front end and the rear end of the bottom plate respectively, a heating plate is placed between the two clamping plates, and the heating plate is pressed into the inflatable sealing ring along the outline of the inflatable sealing ring and fixedly connected with the bottom plate, so that the inflatable sealing ring presses and attaches the two bonding end faces of the inflatable sealing ring tightly under the guiding action of the heating plate, the two clamping plates and the bottom plate; therefore, the bonding cross section of the inflatable sealing ring can be ensured to be tightly attached; the heating rod and the thermistor are plugged into the bonding tool through a heating hole in the heating plate and are used for heating and completing heat vulcanization of the inflatable sealing ring; and the output end of the temperature controller is connected with the heating rod through the relay.

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 multichannel thermocouple temperature compensation method for a liquid rocket engine test, and relates to the technical field of liquid rocket engine tests, and the method comprises the steps: determining the type of a target thermocouple temperature sensor according to the characteristics of a tested object in a to-be-tested liquid rocket engine, and determining a corresponding temperature compensation wire; a target thermocouple temperature sensor is connected with a temperature compensation wire to form an acquisition device; a thermocouple voltage signal and a thermistor voltage signal are acquired in real time through an acquisition device, and the signals are transmitted to a processor based on a wiring terminal in the temperature compensation cabinet; and the thermocouple temperature corresponding to the input data is determined through a preset cold end compensation algorithm in the processor. According to the invention, the precision and reliability of temperature measurement can be improved, the system structure is simplified, the system cost is reduced, and the system is suitable for temperature measurement requirements of multi-channel, high-precision and complex environments in a liquid rocket engine test.

A roasting probe includes a probe head tube, a circuit board, a NTC thermistor, an antenna and a holding tube. The probe head tube includes a connection tube and a probe pin tube. The probe pin tube includes a shrunk portion, a transition portion and a cone-shaped portion that are consequently connected. The shrunk portion is connected to connection tube. The circuit board is provided with a limit part and is limited and provided in connection tube. An end of the circuit board away from probe pin tube is provided with a communication circuit. The NTC thermistor is connected to an end of circuit board facing probe pin tube and located inside transition section. The holding tube is made of ceramic and detachably provided at an end of connection tube away from probe pin tube. The antenna is electrically connected to communication circuit and located inside holding tube.

This optical module is provided with: a temperature regulator (2) that performs a function of regulating the temperature of a semiconductor laser (5); and an optical monitor (6) that functions to monitor the optical output and the oscillation wavelength from the semiconductor laser (5). And a heater (7) and a thermistor (8) housed in the package (1). The heater (7) and the thermistor (8) are electrically connected in parallel, and one end of the heater (7) and one end of the thermistor (8) are connected to the heater and thermistor common pin (P7).

A temperature control device for a non-magnetic packaging VCSEL laser comprises a main control module which adopts NI equipment and a LabVIEW program, provides high-resolution data acquisition and real-time PID parameter adjustment, and realizes accurate temperature control. And the high-frequency modulation module shifts the temperature control signal to a high frequency band to suppress low-frequency magnetic field noise. The power supply module is composed of a switching power supply and a voltage stabilizing circuit, provides a stable power supply for the power amplifier operational amplifier and the radiator, and reduces noise and transient interference. The power amplification module is composed of two stages of amplification circuits, and a low-noise amplifier and a high-frequency current feedback amplifier are adopted to achieve efficient power amplification of signals. The heating module comprises a double-layer 2N polar distance heating film and an NTC negative feedback thermistor, the upper magnetic field and the lower magnetic field of a heating coil are mutually offset, non-magnetic heating is ensured, meanwhile, the NTC thermistor is combined for accurate temperature measurement, current is controlled in cooperation with a PID algorithm, and temperature stability is ensured. Compared with the prior art, the device has remarkable advantages in the aspects of non-magnetic heating, low-noise power supply and temperature control precision.

The utility model provides a heating sheet with double groups of heating circuits, which comprises a bottom film, the upper surface of the bottom film is provided with a front heating component, the lower surface of the bottom film is provided with a back heating component, and the bottom film is provided with circuits. The protection effect can be achieved through the first thermistor and the second thermistor, the first heating bodies and the second heating bodies are arranged in a staggered mode, the heat dissipation area can be increased, the third heating bodies are arranged in an S-shaped bent mode, the heat dissipation area can be further increased, and the heat dissipation efficiency is improved. On-off of the first heating body, the second heating body and the third heating body is respectively controlled through a circuit, front heating, back heating or double-face heating can be selectively controlled, more choices can be provided for users, electronic components can be individually added on the first heating body and the second heating body through arrangement of patch interfaces, and the heating effect is improved. And therefore, different use requirements of users are met.

The charging inlet includes a front housing; a terminal stored in the front housing; a thermistor stored in the front housing and detecting the temperature of the terminal; and a terminal holder attached to the front housing and holding the terminal. The terminal holder has a protrusion for regulating slip-off of the thermistor stored in the front housing.

The utility model relates to the technical field of temperature sensors, and provides a surface-mounted temperature sensor, which comprises a sensor body, the sensor body comprises a shell, a mounting cavity, a thermistor body, a resistor pin, a through groove and a wire harness, and the bottom end of the shell is provided with a sealing structure. According to the sealing structure, under the protection effect of the sealing ring, water vapor can be prevented from entering the mounting cavity through the through groove, meanwhile, the inner wall of the sealing ring abuts against the outer wall of the wire harness, the empty groove deforms under the extrusion effect of the wire harness, and when deformation rebounds, extrusion force is exerted on the sealing ring; according to the wire harness sealing device, the extrusion force between the sealing ring and the wire harness can be increased, the sealing performance is improved, the connecting block and the sealing ring can be conveniently detached and replaced from the lower end of the shell under the connecting action of the clamping block and the clamping groove, and the device has the functions of conveniently sealing the bottom of the shell and conveniently detaching and replacing; and the safety and the service life of the surface-mounted temperature sensor in use are improved.