Multi-channel infrared sensor

Abstract

The utility model provides a multichannel infrared sensor applied to the field of infrared sensors, which comprises a tube socket, a ceramic circuit board fixed on the top of the tube socket, a window cap packaged on the top of the tube socket, a detection window and a sapphire lens arranged on the window cap, a detection module arranged on one side of the ceramic circuit board, and a detection module arranged on the other side of the ceramic circuit board. The detection module comprises an upper supporting piece and a lower supporting piece which are fixed in an overlapped mode, each of the upper supporting piece and the lower supporting piece comprises a supporting frame, a plurality of assembling grooves which are arranged in an equidistant array mode are formed in the supporting frame, main conduction columns are arranged in the assembling grooves, heat dissipation notches are formed in one sides of the assembling grooves, and folding grooves are formed in the top of the supporting frame. According to the invention, the matching of the folding groove and the folding convex block is utilized, so that the upper supporting piece and the lower supporting piece can be stably folded and assembled, the anti-seismic performance and the heat dissipation performance are higher, the market prospect is achieved, and the support is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of infrared sensors, and in particular to a multi-channel infrared sensor. Background Art

[0002] A pyroelectric sensor is a sensor that can sense heat changes and convert them into electrical signals. It is based on the pyroelectric effect, that is, certain materials will generate electric charges when they are subjected to heat changes. When the pyroelectric sensor is subjected to external heat changes, the pyroelectric material inside it will produce charge changes, thereby generating electrical signals.

[0003] Pyroelectric sensors are commonly used in human body sensors, gas analysis, flame detection, non-contact temperature measurement and other fields. Pyroelectric sensors can sense the different degrees of infrared wave absorption of different gases, and detect gases by measuring the infrared absorption wavelength, thereby realizing gas detection and monitoring. The sensitive elements in traditional multi-channel infrared sensors are arranged in an equidistant manner. Due to the large gap between the filter and the sensitive element, the refraction angle is increased due to the gap between the two, which affects the detection sensitivity. In addition, traditional sensitive elements are installed in a way that fits with a fixed frame, such as a pyroelectric infrared sensor with application number 202311147022.6, which leads to a decrease in the heat dissipation efficiency of the sensitive element and affects the working temperature of the sensitive element. Therefore, a multi-channel infrared sensor is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the present application is to solve the technical problem that the sensitive element assembly method of the existing infrared sensor affects the sensor sensitivity and heat dissipation efficiency. Compared with the existing technology, a multi-channel infrared sensor is provided, including a tube seat, a ceramic circuit board is fixed on the top of the tube seat, a pin is fixed on the bottom of the tube seat, a window cap is also encapsulated on the top of the tube seat, a detection window is provided on the window cap, a sapphire lens is encapsulated in the detection window, a detection module is fixed on the side of the ceramic circuit board away from the tube seat, the detection module includes an upper support member and a lower support member that are superimposed and fixed, the upper support member and the lower support member both include a support frame, a plurality of assembly slots arranged in an equidistant array are provided in the support frame, a main conduction column is provided in the assembly slot, a heat dissipation notch is provided on one side of the assembly slot, a mating slot is provided on the top of the support frame, and a mating protrusion corresponding to the mating slot is provided on the bottom of the support frame;

[0005] The assembly groove of the upper support member is fixed with a black spray sensitive element through the support of the main conduction column, the matching groove of the upper support member is fixed with filters matching the number of black spray sensitive elements, the assembly groove of the lower support member is fixed with a compensation sensitive element through the support of the main conduction column, and the upper support member is buckled in the matching groove of the lower support member by overlapping matching protrusions.

[0006] Preferably, a corner of each of the upper support member and the lower support member is provided with a direction marking angle, the direction marking angle is a 45° chamfered structure, and when the upper support member and the lower support member are superimposed, the two sets of direction marking angles are arranged on the same side.

[0007] Preferably, the assembly groove is a positive direction groove structure, the side wall of the assembly groove is a 90° right-angle side wall structure, the main conduction column is located at the center of the assembly groove, and the circumferential side of the main conduction column is also provided with 4 groups of auxiliary conduction columns arranged at equal angles, the auxiliary conduction column is equal to the height of the main conduction column, and the diameter of the main conduction column is larger than the auxiliary conduction column.

[0008] Preferably, the number of assembly slots in the support frame is 4 groups.

[0009] Preferably, the number of assembly slots in the support frame is 9 groups.

[0010] Compared with the prior art, the advantages of this application are:

[0011] During actual assembly of the present application, a gap is designed between the optical filter in the upper support and the black spray sensitive element. Compared with the traditional structure, the present application fixes the optical filter through the matching groove, and supports the black spray sensitive element through the main conduction column and the auxiliary conduction column, which can effectively shorten the assembly gap between the optical filter and the black spray sensitive element, reduce the refraction angle error caused by the large gap between the optical filter and the black spray sensitive element, and make the sensor sensing detection effect more sensitive. At the same time, the black spray sensitive element is supported in the upper support by the main conduction column and the auxiliary conduction column, and the compensation sensitive element is supported in the lower support, so that a heat dissipation gap is set at the bottom of the black spray sensitive element and the compensation sensitive element. With the setting of the heat dissipation notch, the black spray sensitive element and the compensation sensitive element have better heat dissipation space during the sensing detection process, further effectively improving the high temperature resistance of the sensor, and facilitating stable operation under high temperature conditions. At the same time, the present application utilizes the matching groove and the matching protrusion to enable the upper support and the lower support to be stably matched and assembled, and has higher seismic resistance in structure, while reducing the difficulty of assembly, has market prospects, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the front structure of this application;

[0013] Figure 2 This is a schematic diagram of the bottom structure of this application;

[0014] Figure 3 This is a schematic diagram of the explosion structure of this application;

[0015] Figure 4 This is a schematic diagram of the front structure of the support frame proposed in this application;

[0016] Figure 5This is a schematic diagram of the bottom structure of the support frame proposed in this application;

[0017] Figure 6 This is a schematic diagram of the structure of the support frame proposed in Example 2 of the present application.

[0018] Description of the numbers in the figure:

[0019] Tube base 1, window cap 2, sapphire lens 3, ceramic circuit board 4, filter 5, black spray sensitive element 6, upper support 701, lower support 702, support frame 7, heat dissipation notch 71, main conduction column 72, auxiliary conduction column 721, assembly groove 73, matching groove 74, direction marking angle 75, matching protrusion 76, compensation sensitive element 8. DETAILED DESCRIPTION

[0020] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application. Example

[0021] The utility model provides a multi-channel infrared sensor, please refer to Figure 1-5 , including a tube seat 1, a ceramic circuit board 4 is fixed on the top of the tube seat 1, a pin is fixed on the bottom of the tube seat 1, a window cap 2 is also packaged on the top of the tube seat 1, a detection window is provided on the window cap 2, the size of the detection window is 4×4mm, the sensing angle of the detection window is 120°, a sapphire lens 3 is packaged in the detection window, a detection module is fixed on the side of the ceramic circuit board 4 away from the tube seat 1, the detection module includes an upper support member 701 and a lower support member 702 that are fixed and stacked, the upper support member 701 and the lower support member 702 both include a support frame 7, and a plurality of assembly slots 73 arranged in an equidistant array are provided in the support frame 7. It should be noted that in this embodiment, the number of the assembly slots 73 in the support frame 7 is 4 groups, that is, in this embodiment, the detection channel of the sensor is a four-channel architecture, a main conduction column 72 is provided in the assembly slot 73, a heat dissipation notch 71 is provided on one side of the assembly slot 73, a mating slot 74 is provided on the top of the support frame 7, and a mating protrusion 76 corresponding to the mating slot 74 is provided on the bottom of the support frame 7;

[0022] The black spray sensitive element 6 is supported and fixed in the assembly groove 73 of the upper support member 701 through the main conduction column 72, and the filter 5 matching the number of the black spray sensitive elements 6 is fixed in the matching groove 74 of the upper support member 701. The filter 5 is a silicon-based semiconductor vacuum-coated filter lens. The compensation sensitive element 8 is supported and fixed in the assembly groove 73 of the lower support member 702 through the main conduction column 72. The upper support member 701 is overlapped and buckled in the matching groove 74 of the lower support member 702 through the matching protrusion 76.

[0023] See also Figure 4 A direction marking angle 75 is provided at one corner of the upper support member 701 and the lower support member 702. The direction marking angle 75 is a 45° chamfered structure. When the upper support member 701 and the lower support member 702 are superimposed, the two sets of direction marking angles 75 are arranged on the same side, thereby effectively unifying the superimposed direction of the upper support member 701 and the lower support member 702 to prevent assembly errors.

[0024] See also Figure 4 The assembly groove 73 is a positive direction groove structure, the side wall of the assembly groove 73 is a 90° right-angle side wall structure, the main conduction column 72 is located at the center of the assembly groove 73, and the circumferential side of the main conduction column 72 is also provided with 4 groups of auxiliary conduction columns 721 arranged at equal angles. The height of the auxiliary conduction column 721 is equal to that of the main conduction column 72, and the diameter of the main conduction column 72 is larger than that of the auxiliary conduction column 721.

[0025] During actual assembly, a gap is designed between the filter 5 and the black-spraying sensitive element 6 in the upper support 701. Compared with the traditional structure, the present application fixes the filter 5 by the matching groove 74, and supports the black-spraying sensitive element 6 by the main conductive column 72 and the auxiliary conductive column 721, which can effectively shorten the assembly gap between the filter 5 and the black-spraying sensitive element 6, reduce the refraction angle error caused by the large gap between the filter 5 and the black-spraying sensitive element 6, and make the sensor sensing detection effect more sensitive. At the same time, the main conductive column 72 and the auxiliary conductive column 721 respectively support the black-spraying sensitive element 6 in the upper support 701, and the black-spraying sensitive element 6 in the lower support 702. The internal support compensation sensitive element 8 is used to provide a heat dissipation gap at the bottom of the black spray sensitive element 6 and the compensation sensitive element 8. Combined with the setting of the heat dissipation notch 71, the black spray sensitive element 6 and the compensation sensitive element 8 have better heat dissipation space during the sensing and detection process, which further effectively improves the high temperature resistance of the sensor and facilitates stable operation under high temperature conditions. At the same time, the present application utilizes the matching groove 74 and the matching protrusion 76 to enable the upper support member 701 and the lower support member 702 to be stably matched and assembled, and the structure has higher seismic resistance, while reducing the difficulty of assembly, having market prospects, and being suitable for promotion and application. Example

[0026] The utility model provides a multi-channel infrared sensor, please refer to Figure 6 , wherein the components identical or corresponding to those in Embodiment 1 are marked with the corresponding reference numerals in Embodiment 1. For the sake of simplicity, only the differences from Embodiment 1 are described below:

[0027] In this embodiment, the number of the assembly slots 73 in the support frame 7 is 9 groups, that is, in this embodiment, the detection channel of the sensor is a nine-channel architecture.

[0028] The above is only the best implementation method adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A multi-channel infrared sensor, comprising a tube holder (1), a ceramic circuit board (4) being fixed on the top of the tube holder (1), a pin being fixed on the bottom of the tube holder (1), a window cap (2) being encapsulated on the top of the tube holder (1), a detection window being provided on the window cap (2), a sapphire lens (3) being encapsulated in the detection window, a detection module being fixed on the side of the ceramic circuit board (4) away from the tube holder (1), characterized in that: The detection module comprises an upper support member (701) and a lower support member (702) which are superimposed and fixed, the upper support member (701) and the lower support member (702) both comprising a support frame (7), a plurality of assembly slots (73) arranged in an equidistant array are provided in the support frame (7), a main conductive column (72) is provided in the assembly slot (73), a heat dissipation notch (71) is provided on one side of the assembly slot (73), a mating slot (74) is provided on the top of the support frame (7), and a mating protrusion (76) corresponding to the mating slot (74) is provided on the bottom of the support frame (7); A black spray sensitive element (6) is fixedly supported in the assembly groove (73) of the upper support member (701) via a main conduction column (72); a number of filters (5) matching the number of black spray sensitive elements (6) is fixedly supported in the mating groove (74) of the upper support member (701); a compensation sensitive element (8) is fixedly supported in the assembly groove (73) of the lower support member (702) via a main conduction column (72); and the upper support member (701) is overlapped and buckled in the mating groove (74) of the lower support member (702) via a mating protrusion (76).

2. A multi-channel infrared sensor according to claim 1, characterized in that: A direction marking angle (75) is provided at one corner of the upper support member (701) and the lower support member (702); the direction marking angle (75) is a 45° chamfered structure; and when the upper support member (701) and the lower support member (702) are superimposed, the two sets of direction marking angles (75) are arranged on the same side.

3. A multi-channel infrared sensor according to claim 1, characterized in that: The assembly groove (73) is a positive direction groove structure, the side wall of the assembly groove (73) is a 90° right angle side wall structure, the main conductive column (72) is located at the center of the assembly groove (73), and the circumferential side of the main conductive column (72) is further provided with four groups of auxiliary conductive columns (721) arranged at equal angles, the auxiliary conductive columns (721) are equal in height to the main conductive columns (72), and the diameter of the main conductive column (72) is greater than that of the auxiliary conductive columns (721).

4. A multi-channel infrared sensor according to claim 1, characterized in that: The number of the assembly grooves (73) in the support frame (7) is four groups.

5. The multi-channel infrared sensor according to claim 1, characterized in that: The number of the assembly grooves (73) in the support frame (7) is 9 groups.

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