Self-weight type surface temperature sensor

Abstract

The utility model provides a self-weight type surface temperature sensor. The sensor comprises a detachable handle, an upper fixed pressing block, a middle heat insulation structure block, a bottom heat conduction temperature equalizing block and a flexible film temperature sensor. The outer wall of the bottom of the detachable handle is provided with a threaded surface which is matched with a threaded hole in the upper fixed pressing block, and the detachable handle can be fixed and detached; the middle heat insulation structural block is filled with a heat insulation material and is sealed through an upper fixed pressing block; the flexible film temperature sensor is clamped between the bottom heat conduction temperature equalizing block and the middle heat insulation structure block; the upper fixing pressing block and the bottom heat conduction temperature equalizing block are fixed to the middle heat insulation structural block through an upper fixing bolt and a lower fixing bolt correspondingly.

Description

TECHNICAL FIELD

[0001] The utility model relates to surface temperature sensor technical field and surface temperature measurement field, concretely relates to a kind of self-weight formula surface temperature sensor, suitable for the measurement and calibration of constant temperature heating platform surface temperature. BACKGROUND

[0002] As a kind of key temperature control equipment, constant temperature heating platform is widely used in the production enterprises and inspection and detection institutions of multiple industries, especially plays an important role in the links such as experiment, production, processing, test, quality control and inspection and detection.In chemical, physical, biological laboratory, constant temperature heating platform is used for the experiment needing constant temperature condition, such as catalyst reaction, material performance test and biological sample processing, generally uses temperature range is (room temperature~300) ℃.In electronic industry, constant temperature heating platform is often used for welding, packaging and chip test generally uses temperature range is (room temperature~400) ℃.Constant temperature heating platform plays an important role in the dissolution test of medicine, culture medium preparation and biological sample heating processing, generally uses temperature range is (30~70) ℃.In material industry, constant temperature heating platform is used for testing the thermal expansion coefficient, heat resistance and other properties of material, and the working temperature range of common equipment is room temperature to 500 ℃.The temperature deviation of constant temperature heating platform required by each industry is generally ±5.0~±10 ℃, temperature fluctuation is ±1.0 ℃, temperature uniformity is not more than 5.0 ℃, but in part industry such as photovoltaic, semiconductor, temperature deviation generally requires ±1.0 ℃ within, temperature fluctuation is not more than ±0.5 ℃, temperature uniformity is not more than 1.0 ℃.

[0003] Currently, the accurate measurement of surface temperature is a difficulty in the field of temperature measurement and metrology. Common surface temperature measurement sensors are mainly divided into contact type and non-contact type. The contact type surface temperature meter mainly includes thermocouple surface temperature meter and thermal resistance surface temperature meter. The non-contact type mainly includes infrared thermometer and thermal imager, etc. The non-contact type temperature meter is greatly affected by the emissivity of the measured object surface when measuring the surface temperature, and the emissivity of the object surface needs to be determined in advance. The accuracy of the non-contact type temperature meter is generally not high, and the general error is ± 2.0℃ or ± 2% of the reading value, whichever is greater. Currently, the contact type surface temperature meter is the most commonly used sensor for measuring and calibrating the surface temperature of the constant temperature heating table. However, due to the influence of the temperature sensing point and the contact surface of the contact type surface temperature meter, the accuracy of the actual measurement of the surface temperature is not optimistic. The thermocouple surface temperature meter has small probe heat capacity and can quickly respond to temperature changes. The temperature measurement range is also wide. Generally, the thermocouple surface temperature meter supports the measurement of (-50-800) ℃ surface. However, the probe of the thermocouple surface temperature meter needs to be in close contact with the measured surface. However, there may be a gap in the actual contact surface, which may cause contact thermal resistance and reduce the measurement accuracy. At the same time, the cold end temperature compensation is not accurate, which may cause measurement error. In summary, the thermocouple surface temperature meter has advantages in response speed, temperature range and durability, but has disadvantages in accuracy, stability and anti-interference ability. The temperature measurement accuracy of the platinum resistance itself is high, which is usually ± 0.15℃ or even higher. However, the platinum resistance probe needs to be in close contact with the measured surface, and the thermal resistance between the contact surfaces may cause measurement error. The thermal inertia of the platinum resistance is large, and the response time is usually slower than that of the thermocouple. The measurement requires a long stabilization time. In addition, the structure of the platinum resistance probe may cause some heat to be conducted outward from the probe, and the measurement result is greatly affected by the state of the upper surface of the platinum resistance probe.

[0004] According to the nominal error of the thermocouple surface temperature meter of Japanese Anli ANRITSU, the error is ± 2.5℃ at 100℃. According to JJF 2137-24 "Surface Platinum Resistance Thermometer Calibration Specification", the surface platinum resistance thermometer has a value error of ± 6℃ at [-60-0) ℃, a value error of ± 4℃ at [0-200] ℃, and a value error of ± 12℃ at (200-600] ℃. It can be seen that the current surface temperature measurement reliability is poor, and the existing surface temperature meter generally has large measurement error, which is difficult to meet the demand of accurate measurement and calibration of the surface temperature of the high-precision constant temperature heating table. Practical new type

[0005] The utility model aims at the current market can choose the high-precision surface temperature meter is less, and proposes a kind of self-weight surface temperature sensor using flexible film temperature sensor as temperature measuring element and being equipped with special heat conduction and heat insulation block structure.

[0006] The technical scheme of the utility model is:

[0007] The utility model provides a kind of self-weight formula surface temperature sensor, and the sensor includes detachable handle, upper fixed pressing block, intermediate heat insulation structure block, bottom heat conduction uniform temperature block and flexible film temperature sensor;

[0008] The bottom outer wall of the detachable handle has a threaded surface that mates with a threaded hole in the upper fixed pressing block, allowing for securement and removal.

[0009] The intermediate heat insulation structure block is filled with insulation material and sealed by the upper fixed pressing block.

[0010] The flexible film temperature sensor is clamped between the bottom heat conduction uniform temperature block and the intermediate heat insulation structure block.

[0011] The upper fixed pressing block and the bottom heat conduction uniform temperature block are fixed to the intermediate heat insulation structure block by upper fixed bolts and lower fixed bolts, respectively.

[0012] Further, the upper fixed pressing block includes an upper fixed pressing block body, an upper fixed pressing block bottom boss, a sensor wire pressing block, a threaded hole, and an upper fixed pressing block fixing hole.

[0013] The size of the upper fixed pressing block bottom boss is adapted to the size of the insulation material filling compartment of the intermediate heat insulation structure block, and is used to compact and seal the insulation material.

[0014] The sensor wire pressing block is used to fix the lead wire of the flexible film temperature sensor, and the upper fixed bolt is inserted into the intermediate heat insulation structure block through the upper fixed pressing block fixing hole.

[0015] Further, the intermediate heat insulation structure block includes an insulation material filling compartment, a sensor fixing groove, a sensor wire fixing pressing curved surface, and a threaded through hole.

[0016] The sensor fixing groove is a U-shaped groove used to fix the flexible film temperature sensor, and the sensor wire fixing pressing curved surface is used to fix the lead wire of the flexible film temperature sensor.

[0017] Further, the bottom heat conduction uniform temperature block includes a sensor support boss, a heat conduction uniform temperature block body, a bottom contact convex surface, a wire support curved surface, and a bottom heat conduction uniform temperature block fixing hole.

[0018] The heat conduction uniform temperature block body is a U-shaped structure column, the sensor support boss is used to fix the flexible film temperature sensor, the bottom contact convex surface directly contacts the surface of the measured object, the wire support curved surface is used for wiring and fixing of the lead wire of the flexible film temperature sensor, and the lower fixed bolt is inserted into the intermediate heat insulation structure block through the bottom heat conduction uniform temperature block fixing hole.

[0019] Further, the heat insulation material adopts aerogel.

[0020] Further, the threaded hole has a bidirectional threaded surface, the upper fixing bolt is inserted into the upper part of the threaded hole through the upper fixing block fixing hole and is fixed, and the lower fixing bolt is inserted into the lower part of the threaded hole through the bottom heat-conducting uniform temperature block fixing hole and is fixed.

[0021] Further, the sensor lead wire lower pressing fixing block, the sensor lead wire fixed lower pressing curved surface and the lead wire supporting curved surface are sequentially matched and used for lead wire leading-out and fixing of the flexible thin film temperature sensor.

[0022] Further, the sensor fixing groove and the sensor supporting boss are sequentially matched and used for fixing the flexible thin film temperature sensor.

[0023] Further, the flexible thin film temperature sensor comprises a sensor temperature sensing probe and a sensor lead wire which are integrally etched on the same copper foil plane.

[0024] The sensor temperature sensing probe adopts double helix lead wires and is externally packaged with an insulating film.

[0025] The sensor lead wire comprises a first lead wire, a second lead wire, a third lead wire and a fourth lead wire, is externally packaged with an insulating film layer, and is provided with lead wire connecting points at the end thereof, including a first lead wire connecting point, a second lead wire connecting point, a third lead wire connecting point and a fourth lead wire connecting point.

[0026] The outermost circle lead-out wire of the double helix lead wire is connected with one end of the first lead wire and the second lead wire; the next outer circle lead-out wire of the double helix lead wire is connected with one end of the third lead wire and the fourth lead wire; the other end of the first lead wire, the second lead wire, the third lead wire and the fourth lead wire is respectively connected with the first lead wire connecting point, the second lead wire connecting point, the third lead wire connecting point and the fourth lead wire connecting point, thereby forming a sensor connecting end; and the upper surface layer of each connecting point is in a bare state relative to the insulating film layer.

[0027] Further, the flexible thin film temperature sensor further comprises a sensor connecting end reinforcing plate which is located at the sensor connecting end and is closely attached to the insulating film layer at the bottom of the sensor lead wire.

[0028] The utility model discloses the beneficial effect:

[0029] The self-weight type surface temperature sensor has high temperature precision and sensitivity, and the accuracy and reliability of surface temperature measurement of the constant temperature heating table are improved through good contact surface heat conduction and sensor back heat insulation.

[0030] The self-weight type surface temperature sensor can significantly improve the precision and real-time performance of surface temperature parameter measurement of the constant temperature heating table, and has important significance in ensuring temperature control quality, improving production efficiency and prolonging equipment life.

[0031] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and wherein exemplary embodiments of the present application are shown.

[0033] Figure 1 The overall structure schematic diagram of the self-weight type surface temperature sensor of the present application is shown.

[0034] Figure 2 The disassembly structure schematic diagram of the self-weight type surface temperature sensor of the present application is shown.

[0035] Figure 3 The upper fixed pressing block structure schematic diagram of the self-weight type surface temperature sensor of the present application is shown.

[0036] Figure 4 The middle heat insulation structure block structure schematic diagram of the self-weight type surface temperature sensor of the present application is shown.

[0037] Figure 5 The bottom heat conduction and temperature equalization block structure schematic diagram of the self-weight type surface temperature sensor of the present application is shown.

[0038] Figure 6 The flexible film temperature sensor structure schematic diagram of the self-weight type surface temperature sensor of the present application is shown.

[0039] In the figure: 1, detachable handle; 2, upper fixed pressing block; 3, middle heat insulation structure block; 4, bottom heat conduction and temperature equalization block; 5, heat insulation material; 6, flexible film temperature sensor; 7, upper fixed bolt; 8, lower fixed bolt;

[0040] 201, upper fixed pressing block body; 202, upper fixed pressing block bottom boss; 203, sensor wire lower pressing fixed block; 204, threaded hole; 205, upper fixed pressing block fixing hole;

[0041] 301, heat insulation material filling bin; 302, sensor fixing groove; 303, sensor wire fixing lower pressing curved surface; 304, threaded through hole;

[0042] 401, sensor support boss; 402, heat conduction uniform temperature block body; 403, bottom contact convex surface; 404, wire support curved surface; 405, bottom heat conduction uniform temperature block fixing hole;

[0043] 601, sensor temperature sensing probe; 603, first wire; 604, second wire; 605, third wire; 606, fourth wire; 607, sensor wiring end reinforcing plate; 608, first wire connecting point; 609, second wire connecting point; 610, third wire connecting point; 611, fourth wire connecting point. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present application will be described in more detail by referring to the attached drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein.

[0045] As shown in Figure 1 , 2 The overall structure of the self-weight type surface temperature sensor of the present application includes a detachable handle 1, an upper fixed pressing block 2, an intermediate heat insulation structure block 3, a bottom heat conduction uniform temperature block 4, heat insulation material 5, a flexible thin film temperature sensor 6, an upper fixed bolt 7, a lower fixed bolt 8, and the like.

[0046] In the present embodiment, the sensor detachable handle 1 is made of 304 stainless steel, is 80 mm long, has an M2.5 thread at the bottom, the thread length is 5 mm, the handle upper end grip diameter is 3 mm, and the length is 20 mm; the upper fixed pressing block 2 and the intermediate heat insulation structure block are made of 304 stainless steel; the bottom heat conduction uniform temperature block is made of T2 red copper; the flexible thin film temperature sensor 6 has a good resistance-temperature linear relationship, and the resistance value is greater than 20Ω at 20℃; the sensor heat insulation material 5 uses aerogel with a diameter of 12.6 mm and a thickness of 6 mm; the upper fixed bolt 7 and the lower fixed bolt 8 are multiple, are M1.6 internal hexagonal bolts made of 304 stainless steel, the thread length of the sensor upper fixed bolt 7 is 6 mm, and the thread length of the lower fixed bolt 8 is 4 mm.

[0047] In this embodiment, the detachable handle 1 of the sensor is fixed and detached through the fixed threaded hole 204 on the upper fixing block 2; the heat insulation material 5 of the sensor is filled into the groove of the middle heat insulation structure block 3 and sealed by the upper fixing block 2; the upper fixing block 2 is fixed to the middle heat insulation structure block 3 by three upper fixing bolts 7.

[0048] In this embodiment, the sensor temperature probe 601 of the flexible thin film temperature sensor 6 is fixed between the bottom heat-conducting and temperature-equalizing block 4 and the middle heat-insulating structure block 3; three lower fixing bolts 8 fix the bottom heat-conducting and temperature-equalizing block 4 and the middle heat-insulating structure block 3.

[0049] like Figure 5 As shown in the schematic diagram, the bottom heat-conducting and temperature-equalizing block structure of the sensor of this utility model consists of a sensor support boss 401, a heat-conducting and temperature-equalizing block body 402, a bottom contact convex surface 403, a wire support curved surface 404, and three bottom heat-conducting and temperature-equalizing block fixing holes 405.

[0050] In this embodiment, the thermally conductive and temperature-equalizing block body 402 has a thickness of 3mm and is a U-shaped column structure; the flexible thin-film temperature sensor support boss 401 has a protrusion height of 0.1mm, the bottom contact convex surface 403 of the thermally conductive and temperature-equalizing block has a diameter of 14mm and a height of 1mm, and is in direct contact with the surface of the object being measured; the thermally conductive and temperature-equalizing block body 402 has a thickness of 3mm; the flexible thin-film temperature sensor wire support curved surface 404 has a radius of curvature of 2mm and a width of 13mm, and is used for the routing and fixing of the flexible thin-film temperature sensor 6 wire; the bottom thermally conductive and temperature-equalizing block fixing hole 405 has a countersunk head size of 3.2mm in diameter and 2mm in depth, and a through hole diameter of 2mm; the lower fixing bolt 8 fixes the bottom thermally conductive and temperature-equalizing block 4 to the middle heat-insulating structure block 3 through the fixing hole on the bottom thermally conductive and temperature-equalizing block 4.

[0051] like Figure 4 As shown in the schematic diagram, the intermediate heat insulation structure block of the sensor of this utility model consists of a heat insulation material filling chamber 301, a sensor fixing groove 302, a sensor wire fixing and pressing curved surface 303, and three threaded through holes 304.

[0052] In this embodiment, the diameter of the heat insulation material filling chamber 301 is 14mm and the depth is 8mm; the flexible film temperature sensor fixing groove 302 is a U-shaped groove with a depth of 0.1mm, used to fix the flexible film temperature sensor 6; the radius of curvature of the flexible film temperature sensor wire fixing pressure surface 303 is 2mm, used to press down and fix the wire of the flexible film temperature sensor 6; the threaded through hole 304 is a 1.6M threaded through hole; three lower fixing bolts 8 are correspondingly fixed at the lower end of the threaded through hole 304.

[0053] like Figure 3As shown in the schematic diagram, the upper fixing block structure of the sensor of this utility model consists of an upper fixing block body 201, an upper fixing block bottom boss 202, a sensor wire pressing fixing block 203, a detachable handle fixing threaded hole 204, and three upper fixing block fixing holes 205.

[0054] In this embodiment, the upper fixing block body 201 has a thickness of 4mm, and the bottom boss 202 of the upper fixing block has a diameter of 13.8mm and a height of 2mm, used to compact and seal the heat insulation material 5 in the heat insulation material filling chamber 301; the flexible film temperature sensor wire pressing fixing block 303 has a length of 12.6mm and a width of 5mm, used to fix the lead-out of the flexible film temperature sensor 6; the countersunk head of the upper fixing block fixing hole 205 has a diameter of 3.2mm and a depth of 2mm, and the through hole diameter is 2mm; the three upper fixing bolts 7 fix the upper fixing block 2 to the middle heat insulation structure block 3 through the corresponding upper fixing block fixing holes 205. The upper fixing bolts 7 are fixed at the upper end of the threaded through hole 304.

[0055] like Figure 6 As shown, the flexible thin-film temperature sensor used is composed of a sensor temperature probe 601, an insulating film layer 602, a first wire 603, a second wire 604, a third wire 605, a fourth wire 606, a sensor terminal reinforcement plate 607, a first wire connection point 608, a second wire connection point 609, a third wire connection point 610, and a fourth wire connection point 611.

[0056] In the embodiment, the helical line structure of the sensor temperature sensing probe 601 of the flexible film temperature sensor is etched and processed by a 12.5 μm thick pure copper foil; the first, second, third and fourth conductive wires 603, 604, 605 and 606 have a length of 100 mm and a uniform width of 2 mm; the outermost circle of the helical line structure of the sensor temperature sensing probe 601 is connected to the first and second conductive wires 603 and 604; the next outer circle of the helical line structure of the sensor temperature sensing probe 601 is connected to the third and fourth conductive wires 605 and 606, and the connection points are in the same plane without welding; the first, second, third and fourth conductive wires 603, 604, 605 and 606 are integrally connected to the first, second, third and fourth conductive wire connection points 608, 609, 610 and 611, respectively, and belong to the same plane as the helical line structure of the sensor temperature sensing probe 601; the first, second, third and fourth conductive wire connection points 608, 609, 610 and 611 have a width of 1 mm and a spacing of 1 mm, and the upper surface of each connection point is in a bare state without covering the insulating film layer 602; the resistance value of the sensor temperature sensing probe 601 is measured by a four-wire method, in which the first conductive wire connection point 608 is connected to a measurement signal +I, the second conductive wire connection point 609 is connected to a signal -I, the third conductive wire connection point 610 is connected to a signal +V, and the fourth conductive wire connection point 611 is connected to a signal -V.

[0057] In the embodiment, the insulating film layer 602 is a high-temperature-resistant PI film, which can withstand a maximum temperature of 300°C. The upper and lower high-temperature-resistant PI films are fused and packaged by a hot pressing process to fix the helical line structure of the sensor temperature sensing probe 601, the first, second, third and fourth conductive wires 603, 604, 605 and 606, and the first, second, third and fourth conductive wire connection points 608, 609, 610 and 611. The high-temperature-resistant PI film has a thickness of 50 μm, and the overall thickness of the sensor after packaging the upper and lower high-temperature-resistant PI films is 0.12 mm. The sensor is also insulated and waterproof, and can be bent by 90° or less under certain conditions, so that the sensor has flexibility.

[0058] In the embodiment, the sensor terminal reinforcing plate 607 is a 0.3 mm thick PI film that tightly adheres to the lower insulating layer of the sensor terminal, has the same size as the lower insulating layer, and has a length of 20 mm. The sensor terminal reinforcing plate 607 is used to enhance the hardness of the first, second, third and fourth conductive wire connection points 608, 609, 610 and 611, and facilitate plug-in connection with the wire terminal.

[0059] In the embodiment, the diameter of the encapsulation insulating film of the sensor temperature sensing probe is 12 mm, the diameter of the double helix wire of the temperature sensing probe is 10 mm; the width of the double helix wire is 0.05±0.01 mm, the interval between the double helix wires is 0.05±0.01 mm, and both are equidistant; the target resistance value of the double helix wire processed according to the size of the utility model can reach 20Ω or more under the condition of 20℃, and the resistance value of the temperature sensing probe reaches 20Ω or more. The correlation coefficient needs to be obtained by linear fitting after resistance-temperature measurement using a precision constant temperature tank, a standard platinum resistance and a multi-purpose digital multimeter.

[0060] The above has described various embodiments of the utility model, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Without deviating from the described embodiments.

Claims

1. A self-weighted surface temperature sensor, characterized by, The sensor comprises a detachable handle (1), an upper fixed pressing block (2), an intermediate heat insulation structure block (3), a bottom heat conduction uniform temperature block (4) and a flexible thin film temperature sensor (6); The bottom outer wall of the detachable handle (1) has a threaded surface which is matched with the threaded hole (204) in the upper fixed pressing block (2) and can be fixed and detached; The intermediate heat insulation structure block (3) is filled with heat insulation material (5) and sealed by the upper fixed pressing block (2); The flexible thin film temperature sensor (6) is clamped between the bottom heat conduction uniform temperature block (4) and the intermediate heat insulation structure block (3); The upper fixed pressing block (2) and the bottom heat conduction uniform temperature block (4) are fixed to the intermediate heat insulation structure block (3) by the upper fixed bolt (7) and the lower fixed bolt (8) respectively.

2. The self-weighted surface temperature sensor of claim 1, wherein, The upper fixed pressing block (2) comprises an upper fixed pressing block body (201), an upper fixed pressing block bottom boss (202), a sensor wire pressing block (203), a threaded hole (204) and an upper fixed pressing block fixing hole (205); The size of the upper fixed pressing block bottom boss (202) is matched with the size of the heat insulation material filling bin (301) of the intermediate heat insulation structure block (3) and is used for compacting and sealing the heat insulation material (5); The sensor wire pressing block (203) is used for fixing the lead wire of the flexible thin film temperature sensor (6), and the upper fixed bolt (7) is inserted into the intermediate heat insulation structure block (3) through the upper fixed pressing block fixing hole (205).

3. The self-weighted surface temperature sensor of claim 2, wherein, The intermediate heat insulation structure block (3) comprises a heat insulation material filling bin (301), a sensor fixing groove (302), a sensor wire fixing pressing curved surface (303) and a threaded through hole (304); The sensor fixing groove (302) is a U-shaped groove and is used for fixing the flexible thin film temperature sensor (6); and the sensor wire fixing pressing curved surface (303) is used for fixing the lead wire of the flexible thin film temperature sensor (6).

4. The self-weighted surface temperature sensor of claim 3, wherein, The bottom heat conduction uniform temperature block (4) comprises a sensor support boss (401), a heat conduction uniform temperature block body (402), a bottom contact convex surface (403), a lead wire support curved surface (404) and a bottom heat conduction uniform temperature block fixing hole (405); The heat conduction uniform temperature block body (402) is a U-shaped structure column; the sensor support boss (401) is used for fixing the flexible thin film temperature sensor (6); the bottom contact convex surface (403) is directly contacted with the surface of a measured object; the lead wire support curved surface (404) is used for wiring and fixing the lead wire of the flexible thin film temperature sensor (6); and the lower fixed bolt (8) is inserted into the intermediate heat insulation structure block (3) through the bottom heat conduction uniform temperature block fixing hole (405).

5. The self-weighted surface temperature sensor of claim 1, wherein, The heat insulation material (5) is aerogel.

6. The self-weighted surface temperature sensor of claim 4, wherein, The threaded through hole (304) has a bidirectional threaded surface, the upper fixed bolt (7) is inserted into the upper part of the threaded through hole (304) through the upper fixed pressing block fixing hole (205) and is fixed, and the lower fixed bolt (8) is inserted into the lower part of the threaded through hole (304) through the bottom heat conduction uniform temperature block fixing hole (405) and is fixed.

7. The self-weighted surface temperature sensor of claim 4, wherein, The sensor wire down-pressing fixing block (203), the sensor wire fixing down-pressing curved surface (303) and the wire supporting curved surface (404) are sequentially matched, and are used for wire leading-out and fixing of the flexible thin film temperature sensor (6).

8. The self-weighted surface temperature sensor of claim 4, wherein, The sensor fixing groove (302) and the sensor supporting boss (401) are sequentially matched, and are used for fixing the flexible thin film temperature sensor (6).

9. The self-weighted surface temperature sensor of claim 4, wherein, The flexible thin film temperature sensor (6) comprises a sensor temperature sensing probe (601) and a sensor wire, which are integrally etched on the same copper foil plane. The sensor temperature sensing probe (601) adopts double helix wires, and is externally packaged with an insulating film. The sensor wire comprises a first wire (603), a second wire (604), a third wire (605) and a fourth wire (606), is externally packaged with an insulating film layer (602), and is provided with wire connecting points at the end of the sensor wire, including a first wire connecting point (608), a second wire connecting point (609), a third wire connecting point (610) and a fourth wire connecting point (611). The outermost circle leading-out wire of the double helix wire is connected with one end of the first wire (603) and the second wire (604); the next outermost circle leading-out wire of the double helix wire is connected with one end of the third wire (605) and the fourth wire (606); the other end of the first wire (603), the second wire (604), the third wire (605) and the fourth wire (606) is respectively connected with the first wire connecting point (608), the second wire connecting point (609), the third wire connecting point (610) and the fourth wire connecting point (611) in correspondence, to form a sensor wiring end; and the upper layer of each connecting point is in a bare state relative to the insulating film layer (602).

10. The self-weighted surface temperature sensor of claim 9, wherein, The flexible thin film temperature sensor (6) further comprises a sensor wiring end reinforcing plate (607), which is located at the sensor wiring end and is closely attached to the insulating film layer (602) at the bottom of the sensor wire.

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