An infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt

Abstract

The utility model discloses an infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt, comprising a shell, a plurality of infrared filters being arranged on the shell, a tube seat being arranged on the lower side of the shell, the shell being connected to the tube seat, the shell and the tube seat forming a closed chamber, an epoxy resin gasket being arranged on the tube seat, a PCB board being arranged on the epoxy resin gasket; the PCB board being provided with a substrate, a heat-insulating separation belt being arranged on a surface of the substrate away from the PCB board, the heat-insulating separation belt dividing the substrate into a plurality of detection areas, the detection areas being separated by the heat-insulating separation belt; the detection areas being provided with a semiconductor layer, the semiconductor layer being connected to the substrate; the semiconductor layer being provided with sensitive elements, heat-insulating separation belts being designed between the sensitive elements at the same time, so that the sensitive elements can still work independently on the same substrate without interfering with each other; the sensitive element preparation technology is improved, the pyroelectric effect of the sensitive element is enhanced, and the gas concentration detection capability of the sensitive element is enhanced.

Description

Technical Field

[0001] The utility model relates to a detector, in particular to an infrared pyroelectric detector for measuring ethylene and acetylene and provided with a heat-insulating separation belt. Background Art

[0002] Ethylene and acetylene are two common industrial gases. Their detection is of great significance in the fields of industrial safety and environmental protection. Infrared pyroelectric detectors are generally used to measure these two gases.

[0003] Traditional pyroelectric infrared detectors mostly use the method of specifying infrared filters to detect two target gases. However, since the spectra of the target gases have repeated parts in specific bands, false alarms and interference may occur when the detector detects the target gas, affecting the accuracy of the detector.

[0004] Therefore, when using infrared pyroelectric detectors to measure these two gases, how to avoid interference from other gases, as well as the problem of inaccurate measurement results caused by mutual interference between acetylene and ethylene gases, have become difficult problems that urgently need to be solved in this field. Utility Model Content

[0005] In view of the above problems, the utility model designs an infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt, comprising a shell, a plurality of infrared filters are arranged on the shell, a tube seat is arranged on the lower side of the shell, the shell is connected to the tube seat, the shell and the tube seat form a closed chamber, an epoxy resin gasket is arranged on the tube seat, and a PCB board is arranged on the epoxy resin gasket;

[0006] The PCB board is provided with a substrate, and a surface of the substrate away from the PCB board is provided with a heat-insulating separation belt, the heat-insulating separation belt divides the substrate into a plurality of detection areas, and the detection areas are separated by the heat-insulating separation belt;

[0007] The detection area is provided with a semiconductor layer, and the semiconductor layer is connected to the substrate;

[0008] The semiconductor layer is provided with sensitive elements, and the sensitive elements are etched using etching technology.

[0009] Compared with the prior art, the utility model has the following beneficial effects: by arranging a plurality of infrared filters on the housing, an ethylene gas infrared filter and an acetylene gas infrared filter can be used; therefore, the infrared pyroelectric detector of the invention can detect ethylene and acetylene gases simultaneously or separately;

[0010] The substrate is divided into several detection areas by the heat-insulating separation belt, so that each detection area can absorb the spectrum filtered by the corresponding infrared filter separately, and the isolation belt on the substrate is helpful to avoid the spectrum of the adjacent detection area from interfering with the spectrum of the current detection area;

[0011] The detection area is provided with a semiconductor layer, and the semiconductor layer is provided with a sensitive element, so that the sensitive element can convert the received optical signal into an electrical signal without being directly connected to the PCB board circuit, and can be directly electrically connected through the semiconductor layer, thereby effectively avoiding the reduction of the thermal insulation performance of the substrate and avoiding interference during the transmission of the electrical signal; thereby improving the detection accuracy of the sensitive element and the accuracy of low-concentration gas detection, thereby effectively improving the accuracy and reliability of the infrared pyroelectric detector in measuring acetylene and ethylene gases.

[0012] Furthermore, the surface area of ​​the sensitive element is smaller than the area of ​​the surface of the semiconductor layer away from the substrate;

[0013] The surface of the semiconductor layer away from the substrate is provided with a heat-insulating separation zone;

[0014] Preferably, the sensitive element is provided with a main absorption area and a plurality of auxiliary absorption areas; the auxiliary absorption areas are connected to the circuit in the PCB board through wires;

[0015] Preferably, the main absorption area is circular, and the auxiliary absorption area is a rectangle connected to the outer edge of the circular main absorption area.

[0016] The beneficial effects of adopting the above-mentioned further technical scheme are as follows: by arranging a heat-insulating separation zone on the semiconductor layer, it is helpful to avoid the problem of trace light waves passing through the infrared filter being refracted to adjacent sensitive elements, thereby achieving the simultaneous detection of two gases, ethylene and acetylene, while avoiding mutual interference, and further improving the efficiency of detecting gas by a single sensitive element; by providing a main absorption zone and an auxiliary absorption zone in the sensitive element, the lead is connected to the auxiliary absorption zone, and the lead is not directly connected to the main absorption zone to block light. The form of the lead output is different from the metal connection and the PCB connection. The lead output has a smaller resistance and inductance. The lead output is soft and not easy to break, which increases the service life, avoids the space where signals affect each other, and avoids the probability of ethylene and acetylene affecting each other.

[0017] Furthermore, the sensitive elements include ethylene gas measurement sensitive elements, ethylene gas compensation sensitive elements, acetylene gas measurement sensitive elements and acetylene gas compensation sensitive elements.

[0018] The beneficial effect of adopting the above-mentioned further technical scheme is: by providing an ethylene gas measurement sensitive element, an ethylene gas compensation sensitive element, an acetylene gas measurement sensitive element and an acetylene gas compensation sensitive element, ethylene gas and acetylene gas can be detected separately, and at the same time, the compensation sensitive element compensates the detection sensitive element, thereby further improving the accuracy of gas detection.

[0019] Further, a heat-insulating separation belt portion a is provided between the ethylene gas measurement sensitive element and the acetylene gas measurement sensitive element, a heat-insulating separation belt portion b is provided between the acetylene gas compensation sensitive element and the acetylene gas compensation sensitive element, a heat-insulating separation belt portion c is provided between the ethylene gas measurement sensitive element and the ethylene gas compensation sensitive element, and a heat-insulating separation belt portion d is provided between the acetylene gas measurement sensitive element and the acetylene gas compensation sensitive element;

[0020] Preferably, both ends of the thermal insulation separation belt portion a, the thermal insulation separation belt portion b, the thermal insulation separation belt portion c and the thermal insulation separation belt portion d include partition blocks, and a partition line is provided in the middle of the partition block;

[0021] Further preferably, the partition block is an equilateral triangle and the partition line is a strip.

[0022] Furthermore, the thermal insulation separation belt portion a, the thermal insulation separation belt portion b, the thermal insulation separation belt portion c and the thermal insulation separation belt portion d are staggered to form a cross shape, and the cross intersection is an equilateral quadrilateral.

[0023] The beneficial effect of adopting the above further technical solution is: by providing a heat-insulating separation zone between different sensitive elements, the problem of crosstalk between sensitive elements is avoided.

[0024] Further, the thermal insulation separation zone is located between the auxiliary absorption zones;

[0025] and / or

[0026] The semiconductor layer is in the shape of an equilateral octagon.

[0027] The beneficial effect of adopting the above-mentioned further technical solution is: by setting the heat-insulating separation area between the auxiliary absorption areas, the receiving range of the absorption area of ​​the sensitive element is limited, avoiding the intersection caused by trace light refraction, and further improving the efficiency of detecting gas of a single sensitive element.

[0028] Furthermore, the center of the circle of the sensitive element coincides with the center of the semiconductor layer;

[0029] The main absorption region is located inside the outer edge of the substrate, and the auxiliary absorption region is partially located outside the outer edge of the substrate.

[0030] The beneficial effect of adopting the above further technical solution is: by aligning the center of the sensitive element with the center of the semiconductor layer, the main absorption area is located inside the outer edge of the substrate, and the auxiliary absorption area is partially located outside the outer edge of the substrate, thereby improving the absorption capacity of the main absorption area of ​​the sensitive element.

[0031] Furthermore, the surface of the semiconductor layer away from the substrate is connected to an isolation cover;

[0032] The sensitive element is located inside the connection surface between the isolation cover and the semiconductor layer;

[0033] The outer surface of the isolation cover is an anti-disturbance layer, and the inner surface of the isolation cover is a wave dispersion layer.

[0034] The beneficial effects of adopting the above-mentioned further technical scheme are as follows: by providing an isolation cover on the surface of the semiconductor layer, and the sensitive element is located inside the connecting surface between the isolation cover and the semiconductor layer, the detection efficiency of the sensitive element can be further improved; by providing an anti-interference layer on the outer surface of the isolation cover, and the anti-interference layer is a smooth metal layer, the light and signals outside the isolation cover can be shielded; by providing a scattering layer on the inner surface of the isolation cover, and the scattering layer is a rough surface, the diffuse scattering of light inside the isolation cover can be enhanced, and the efficiency of light waves being absorbed by the sensitive element can be increased, thereby improving the light inside the isolation cover.

[0035] Furthermore, detection pins are provided on the lower side of the tube holder, and the detection pins include an ethylene measurement signal output pin, an acetylene measurement signal output pin, a power pin and a ground pin. The detection pins pass through the tube holder, the epoxy resin gasket and are connected to the PCB board.

[0036] Furthermore, the ethylene measurement signal output pin, acetylene measurement signal output pin, power pin and ground pin are distributed in a circular shape on the circumferential side of the substrate, the diameter of the circle surrounded by the ethylene measurement signal output pin, acetylene measurement signal output pin, power pin and ground pin is greater than the length of the cross-shaped thermal insulation separation belt, the ethylene measurement signal output pin, acetylene measurement signal output pin, power pin and ground pin are respectively distributed on the line connecting the intersection of the cross of the thermal insulation separation belt and the center of each sensitive element, and the distance between the ethylene measurement signal output pin, acetylene measurement signal output pin, power pin and ground pin and the center point of the sensitive element is not more than 0.35mm-0.40mm.

[0037] The beneficial effect of adopting the above further technical solution is that the output effect of the signal can be improved by setting a reasonable distribution of the detector pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is an internal top view of a first embodiment of an infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt;

[0039] Figure 2 It is an internal top view of a second embodiment of an infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt;

[0040] Figure 3 This is a schematic diagram of the structure of the heat-insulating separation belt and the detection area of ​​the second embodiment;

[0041] Figure 4 It is an internal top view of the detection area of ​​the second embodiment;

[0042] Figure 5 The figure is a side cross-sectional view of the inside of an infrared pyroelectric detector for measuring ethylene acetylene with a heat-insulating separation strip;

[0043] Wherein: 1. Shell; 2. Infrared filter; 3. Tube socket; 4. Epoxy resin gasket; 5. PCB board; 6. Substrate; 7. Thermal insulation separation belt; 8. Semiconductor layer; 9. Thermal insulation separation area; 10. Main absorption area; 11. Auxiliary absorption area; 12. Ethylene gas measurement sensitive element; 13. Ethylene gas compensation sensitive element; 14. Acetylene gas measurement sensitive element; 15. Acetylene gas compensation sensitive element; 16. Thermal insulation separation belt part a; 17. Thermal insulation separation belt part b; 18. Thermal insulation separation belt part c; 19. Thermal insulation separation belt part d; 20. Partition block; 21. Partition line; 22. Isolation cover; 23. Anti-interference layer; 24. Scattering layer; 25. Ethylene measurement signal output pin; 26. Acetylene measurement signal output pin; 27. Power pin; 28. Ground pin. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0045] Embodiment 1:

[0046] An infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt 7 comprises a shell 1, on which a plurality of infrared filters 2 are arranged, a tube seat 3 is arranged at the lower side of the shell 1, the shell 1 is connected to the tube seat 3, the shell 1 and the tube seat 3 form a closed chamber, an epoxy resin gasket 4 is arranged on the tube seat 3, a PCB board 5 is arranged on the epoxy resin gasket 4; the PCB board 5 is provided with a substrate 6, a heat-insulating separation belt 7 is arranged on the surface of the substrate 6 away from the PCB board 5, the heat-insulating separation belt 7 divides the substrate 6 into a plurality of detection areas, and the detection areas are separated by the heat-insulating separation belt 7; the detection areas are provided with a semiconductor layer 8, and the semiconductor layer 8 is connected to the substrate 6; the semiconductor layer 8 is provided with a sensitive element, and the sensitive element adopts an etching technology, and the plurality of infrared filters 2 are arranged on the shell 1, so that the ethylene gas infrared filter 2 and the acetylene gas infrared filter 2 can be detected; therefore, the infrared pyroelectric detector of the present invention can detect ethylene and acetylene gases simultaneously or separately;

[0047] The substrate 6 is divided into several detection areas by the heat-insulating separation belt 7, so that each detection area can absorb the spectrum filtered by the corresponding infrared filter 2 separately, and the isolation belt on the substrate 6 is helpful to avoid the spectrum of the adjacent detection area from interfering with the spectrum of the current detection area;

[0048] The detection area is provided with a semiconductor layer 8, and the semiconductor layer 8 is provided with a sensitive element, so that the sensitive element converts the received optical signal into an electrical signal without directly connecting to the circuit of the PCB board 5, and directly connects to the semiconductor layer 8, thereby effectively avoiding the reduction of the thermal insulation performance of the substrate 6, and avoiding interference during the transmission of the electrical signal; thereby improving the detection accuracy of the sensitive element and the accuracy of low-concentration gas detection, thereby effectively improving the accuracy and reliability of the infrared pyroelectric detector in measuring acetylene and ethylene gases;

[0049] The surface area of ​​the sensitive element is smaller than the area of ​​the surface of the semiconductor layer 8 away from the substrate 6; the surface of the semiconductor layer 8 away from the substrate 6 is provided with a heat-insulating separation zone 9; the sensitive element is provided with a main absorption zone 10 and a plurality of auxiliary absorption zones 11; the auxiliary absorption zones 11 are connected to the circuit in the PCB board 5 through wires; the main absorption zone 10 is circular, and the auxiliary absorption zone 11 is a rectangle connected to the outer edge of the circular main absorption zone 10. By providing a heat-insulating separation zone 9 on the semiconductor layer 8, it is helpful to avoid the problem of trace light waves passing through the infrared filter 2 being refracted to adjacent sensitive elements, thereby achieving the simultaneous detection of ethylene and acetylene gases while avoiding mutual interference, further improving the efficiency of gas detection of a single sensitive element; the sensitive element is provided with a main absorption zone 10 and an auxiliary absorption zone 11, so that the lead is connected to the auxiliary absorption zone 11, and the lead is not directly connected to the main absorption zone 10 to block light. The form of lead output is different from metal wiring and PCB connection. The lead output has smaller resistance and inductance. The lead output is soft and not easy to break, which increases the service life, avoids the space where signals affect each other, and avoids the probability of ethylene and acetylene affecting each other.

[0050] The thermal insulation separation zone 9 is located between the auxiliary absorption zones 11; and / or the semiconductor layer 8 is an equilateral octagon, and the thermal insulation separation zone 9 is arranged between the auxiliary absorption zones 11 to limit the receiving range of the absorption zone of the sensitive element, thereby avoiding the intersection caused by the refraction of trace amounts of light, and further improving the efficiency of detecting gas by a single sensitive element; the center of the circle of the sensitive element coincides with the center of the semiconductor layer 8, the main absorption zone 10 is located inside the outer edge of the substrate 6, and the auxiliary absorption zone 11 is partially located outside the outer edge of the substrate 6. By coinciding the center of the circle of the sensitive element with the center of the semiconductor layer 8, the main absorption zone 10 is located inside the outer edge of the substrate 6, and the auxiliary absorption zone 11 is partially located outside the outer edge of the substrate 6, thereby improving the absorption capacity of the main absorption zone 10 of the sensitive element;

[0051] The sensitive element comprises an ethylene gas measurement sensitive element 12, an ethylene gas compensation sensitive element 13, an acetylene gas measurement sensitive element 14 and an acetylene gas compensation sensitive element 15. By providing the ethylene gas measurement sensitive element 12, the ethylene gas compensation sensitive element 13, the acetylene gas measurement sensitive element 14 and the acetylene gas compensation sensitive element 15, ethylene gas and acetylene gas can be detected separately, and the compensation sensitive element compensates the detection sensitive element, thereby further improving the gas detection accuracy; an insulating separation band a portion 16 is provided between the ethylene gas measurement sensitive element 12 and the acetylene gas measurement sensitive element 14, an insulating separation band b portion 17 is provided between the acetylene gas compensation sensitive element 15 and the acetylene gas compensation sensitive element 15, and the ethylene gas measurement sensitive element 12 and the acetylene gas compensation sensitive element 15 are provided. A heat-insulating separation belt c portion 18 is provided between the ethylene gas compensation sensitive element 13, and a heat-insulating separation belt d portion 19 is provided between the acetylene gas measurement sensitive element 14 and the acetylene gas compensation sensitive element 15; both ends of the heat-insulating separation belt a portion 16, the heat-insulating separation belt b portion 17, the heat-insulating separation belt c portion 18 and the heat-insulating separation belt d portion 19 include a partition block 20, and a partition line 21 is provided in the middle of the partition block 20; the partition block 20 is an equilateral triangle, and the partition line 21 is a strip; the heat-insulating separation belt a portion 16, the heat-insulating separation belt b portion 17, the heat-insulating separation belt c portion 18 and the heat-insulating separation belt d portion 19 are staggered into a cross shape, and the cross staggered portion is an equilateral quadrilateral; by providing the heat-insulating separation belt 7 between different sensitive elements, the problem of crosstalk between sensitive elements is avoided;

[0052] The lower side of the tube seat 3 is provided with detection pins, which include an ethylene measurement signal output pin 25, an acetylene measurement signal output pin 26, a power pin 27 and a ground pin 28. The detection pins penetrate the tube seat 3, the epoxy resin gasket 4 and are connected to the PCB board 5. The ethylene measurement signal output pin 25, the acetylene measurement signal output pin 26, the power pin 27 and the ground pin 28 are circumferentially distributed on the circumference of the substrate 6. The circle surrounded by the ethylene measurement signal output pin 25, the acetylene measurement signal output pin 26, the power pin 27 and the ground pin 28 is The diameter of the cross is greater than the length of the cross-shaped thermal insulation separation belt 7. The ethylene measurement signal output pin 25, the acetylene measurement signal output pin 26, the power pin 27 and the ground pin 28 are respectively distributed on the lines connecting the intersection points of the cross of the thermal insulation separation belt 7 and the centers of the circles of each sensitive element. The distances between the ethylene measurement signal output pin 25, the acetylene measurement signal output pin 26, the power pin 27 and the ground pin 28 and the center point of the sensitive element are 0.36 mm, 0.38 mm or 0.39 mm. By setting a reasonable distribution of the detector pins, the output effect of the signal can be improved.

[0053] Embodiment 2:

[0054] The same contents as those in the first embodiment are not described in detail here. The differences between the first embodiment and the present embodiment are as follows:

[0055] The present embodiment provides an infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation belt 7, wherein the surface of the semiconductor layer 8 away from the substrate 6 is connected to an isolation cover 22; the sensitive element is located inside the connection surface between the isolation cover 22 and the semiconductor layer 8; the outer surface of the isolation cover 22 is an anti-disturbance layer 23, and the inner surface of the isolation cover 22 is a scattered wave layer 24. By arranging the isolation cover 22 on the surface of the semiconductor layer 8 and the sensitive element being located inside the connection surface between the isolation cover 22 and the semiconductor layer 8, the detection efficiency of the sensitive element can be further improved; by providing the anti-disturbance layer 23 on the outer surface of the isolation cover 22, the anti-disturbance layer 23 is a smooth metal layer, which can shield the light and signals outside the isolation cover 22; by providing the scattered wave layer 24 on the inner surface of the isolation cover 22, the scattered wave layer 24 is a rough surface, which can enhance the diffuse scattering of light inside the isolation cover 22, and can increase the efficiency of light waves being absorbed by the sensitive element, thereby improving the light inside the isolation cover 22.

[0056] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone, comprising a housing (1), characterized in that: The housing (1) is provided with a plurality of infrared filters (2); a tube holder (3) is provided on the lower side of the housing (1); the housing (1) is connected to the tube holder (3); the housing (1) and the tube holder (3) form a closed chamber; an epoxy resin gasket (4) is provided on the tube holder (3); and a PCB board (5) is provided on the epoxy resin gasket (4); The PCB board (5) is provided with a substrate (6), a surface of the substrate (6) away from the PCB board (5) is provided with a heat-insulating separation belt (7), the heat-insulating separation belt (7) divides the substrate (6) into a plurality of detection areas, and the detection areas are separated by the heat-insulating separation belt (7); The detection region is provided with a semiconductor layer (8), and the semiconductor layer (8) is connected to the substrate (6); The semiconductor layer (8) is provided with a sensitive element.

2. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 1, characterized in that: The surface area of ​​the sensitive element is smaller than the area of ​​the surface of the semiconductor layer (8) away from the substrate (6); A heat-insulating separation region (9) is provided on the surface of the semiconductor layer (8) away from the substrate (6).

3. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 2, characterized in that: The sensitive element is provided with a main absorption area (10) and a plurality of auxiliary absorption areas (11); the auxiliary absorption areas (11) are connected to the circuit in the PCB board (5) via wires.

4. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 3, characterized in that: The main absorption area (10) is circular, and the auxiliary absorption area (11) is a rectangle connected to the outer edge of the circular main absorption area (10).

5. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 2, characterized in that: The sensitive elements include an ethylene gas measurement sensitive element (12), an ethylene gas compensation sensitive element (13), an acetylene gas measurement sensitive element (14) and an acetylene gas compensation sensitive element (15).

6. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 5, characterized in that: A heat-insulating separation band a portion (16) is provided between the ethylene gas measurement sensitive element (12) and the acetylene gas measurement sensitive element (14), a heat-insulating separation band b portion (17) is provided between the acetylene gas compensation sensitive element (15) and the acetylene gas compensation sensitive element (15), a heat-insulating separation band c portion (18) is provided between the ethylene gas measurement sensitive element (12) and the ethylene gas compensation sensitive element (13), and a heat-insulating separation band d portion (19) is provided between the acetylene gas measurement sensitive element (14) and the acetylene gas compensation sensitive element (15).

7. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 6, characterized in that: Both ends of the thermal insulation separation belt portion a (16), the thermal insulation separation belt portion b (17), the thermal insulation separation belt portion c (18) and the thermal insulation separation belt portion d (19) include a partition block (20), and a partition line (21) is provided in the middle of the partition block (20).

8. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 7, characterized in that: The partition block (20) is an equilateral triangle, and the partition line (21) is a strip.

9. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 6, characterized in that: The thermal insulation separation belt portion a (16), the thermal insulation separation belt portion b (17), the thermal insulation separation belt portion c (18) and the thermal insulation separation belt portion d (19) are staggered to form a cross shape, and the cross intersection is an equilateral quadrilateral.

10. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 2, characterized in that: The heat-insulating separation zone (9) is located between the auxiliary absorption zones (11); and / or The semiconductor layer (8) is an equilateral octagon.

11. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 10, characterized in that: The center of the circle of the sensitive element coincides with the center of the semiconductor layer (8).

12. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 11, characterized in that: A surface of the semiconductor layer (8) away from the substrate (6) is connected to an isolation cover (22); The sensitive element is located inside the connection surface between the isolation cover (22) and the semiconductor layer (8); The outer surface of the isolation cover body (22) is an anti-disturbance layer (23), and the inner surface of the isolation cover body (22) is a wave dispersion layer (24).

13. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 12, characterized in that: The lower side of the tube holder (3) is provided with detection pins, the detection pins comprising an ethylene measurement signal output pin (25), an acetylene measurement signal output pin (26), a power supply pin (27) and a ground pin (28), the detection pins passing through the tube holder (3), the epoxy resin gasket (4) and connected to the PCB board (5).

14. The infrared pyroelectric detector for measuring ethylene and acetylene with a heat-insulating separation zone according to claim 13, characterized in that: The ethylene measurement signal output pin (25), the acetylene measurement signal output pin (26), the power supply pin (27) and the ground pin (28) are distributed in a circular pattern on the circumference of the substrate; the diameter of the circle formed by the ethylene measurement signal output pin (25), the acetylene measurement signal output pin (26), the power supply pin (27) and the ground pin (28) is greater than the length of the cross-shaped thermal insulation separation band (7); and the distance between the ethylene measurement signal output pin (25), the acetylene measurement signal output pin (26), the power supply pin (27) and the ground pin (28) and the center of the sensitive element is not greater than 0.35 mm to 0.40 mm.

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