CN216978791U - Signal detection device and sensor - Google Patents
Signal detection device and sensor Download PDFInfo
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- CN216978791U CN216978791U CN202122789835.8U CN202122789835U CN216978791U CN 216978791 U CN216978791 U CN 216978791U CN 202122789835 U CN202122789835 U CN 202122789835U CN 216978791 U CN216978791 U CN 216978791U
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Abstract
The utility model provides a signal detection device and a sensor. The signal detection device comprises a first pin connector, a second pin connector, a substrate sheet, a signal electrode sheet, an insulating spacer sheet, an offset electrode sheet and a housing, wherein the substrate sheet, the signal electrode sheet, the insulating spacer sheet, the offset electrode sheet and the housing are vertically stacked; one end of the second pin connector is connected with the offset electrode plate, and the other end of the second pin connector extends upwards and is fixed in the other pin through hole of the housing; the cover and the base sheet are fixed to each other. The utility model can greatly improve the long-term stability of the signal detection device, reduce the manufacturing cost of the signal detection device, effectively reduce the overall dimension of the signal detection device and is beneficial to the miniaturization of the sensor.
Description
Technical Field
The utility model relates to the technical field of detection, in particular to a signal detection device and a sensor.
Background
The signal detection device is mainly applied to a Photo ion detection sensor such as a PID (Photo Ionization Detector) sensor, a GC (Gas chromatography) sensor, and the like. Taking a PID sensor as an example, the PID sensor is a professional sensor commonly used for detecting VOCs (Volatile Organic Compounds) in the fields of environmental protection and industrial safety, has the advantages of small volume, fast response speed, high precision, continuous measurement and the like, and can detect VOCs and other toxic gases with concentrations ranging from 1ppb at an extremely low concentration to tens of thousands ppm at a higher concentration. At present, the PID sensor is widely applied to detection of various organic chemicals, and plays an important role in aspects of industrial safety, environmental monitoring, disaster area accident leakage detection, accident area confirmation, leakage confirmation and the like. In the PID sensor, whether the signal detection device is excellent or not has a direct influence on the performance of the sensor, such as sensitivity, linearity, and uniformity. However, the existing signal detection device products on the market have the problems of high cost, short service life, unstable performance, poor consistency and the like, so that the performance of the photo-ion sensors such as the PID sensor and the like is not stable enough for a long time, and the signal detection device needs to be calibrated or replaced frequently, thereby causing great inconvenience in use. In this regard, the present application proposes an improvement.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned disadvantages of the prior art, an object of the present invention is to provide a signal detection device and a sensor, which are used to solve the problems of the prior art, such as the sensor performance is not stable enough, the signal detection device needs to be calibrated frequently or replaced, and the use is inconvenient, due to the problems of high cost, short service life, unstable performance, and poor consistency of the signal detection device.
In order to achieve the above and other related objects, the present invention provides a signal detection device, which includes a first pin connector, a second pin connector, and a substrate sheet, a signal electrode sheet, an insulating spacer, a bias electrode sheet and a housing stacked in sequence from top to bottom, wherein the substrate sheet is provided with an air inlet, the housing is provided with a light incident hole and a plurality of pin through holes, the signal electrode sheet, the insulating spacer and the bias electrode sheet are all provided with vent holes, one end of the first pin connector is connected with the signal electrode sheet, and the other end of the first pin connector penetrates through the pin through hole on the insulating spacer and extends upwards to be fixed in the pin through hole of the housing; one end of the second pin connector is connected with the offset electrode plate, and the other end of the second pin connector extends upwards and is fixed in the other pin through hole of the housing; the cover and the base sheet are fixed to each other.
Optionally, the first and second pin connectors extend to opposite sides of a light entrance aperture of the housing.
Optionally, each of the first pin connector and the second pin connector includes a flat portion and a cylindrical extension portion, the flat portion is welded and fixed to the flat surface of the corresponding electrode plate, the cylindrical extension portion is connected to the flat portion, and one end of the cylindrical extension portion extends downward through the pin through hole of the corresponding electrode plate, and the other end of the cylindrical extension portion extends upward to the pin through hole of the housing and extends to the outside of the housing.
Optionally, the vent holes on the signal electrode plate, the insulating spacer and the offset electrode plate have the same structure and are vertically corresponding to each other, and vertically correspond to the light incident hole of the housing.
Optionally, a plurality of positioning columns are further arranged on the base sheet, a plurality of positioning holes are correspondingly arranged on the signal electrode sheet, the insulating spacer, the offset electrode sheet and the housing, and the positioning columns sequentially penetrate through the positioning holes of the signal electrode sheet, the insulating spacer, the offset electrode sheet and the housing.
Optionally, the signal electrode plate and the offset electrode plate are both plate-shaped structures, a notch is formed at a position of the signal electrode plate corresponding to the second pin connector, and a notch is formed at a position of the offset electrode plate corresponding to the first pin connector.
Optionally, the housing includes a planar portion and a fence, one end of the fence is connected to an edge of the planar portion, the other end extends longitudinally, the light incident hole and the pin passing hole are disposed on the planar portion, and the substrate sheet is located inside the fence.
Optionally, a plurality of buckles are arranged on the inner side of the fence, a plurality of buckles are correspondingly arranged on the edge of the substrate sheet, and the buckles on the inner side of the fence and the buckles on the edge of the substrate sheet are clamped in a one-to-one corresponding mode.
The utility model also provides a sensor comprising a signal detection device as described in any of the above aspects.
Optionally, the sensor comprises any one of a gas chromatography sensor and a PID sensor.
As described above, the signal detection device and the sensor according to the present invention have the following advantageous effects: the utility model designs each module of the signal detection device into independent structure, can be assembled according to the need, can greatly improve the long-term stability of the signal detection device, reduce the manufacturing cost, and simultaneously can effectively reduce the external dimension of the signal detection device, which is beneficial to the development of gas sensors, especially PID sensors and GC sensors, towards miniaturization direction.
Drawings
Fig. 1 and fig. 2 are schematic views showing an assembly structure of the signal detection device according to the present invention from two opposite directions.
Fig. 3 and 4 show the exploded views of the signal detection device provided by the present invention from two opposite directions.
Description of the element reference
1 first contact pin connector
11 plane part
12 columnar extension
2 second contact pin connector
21 plane part
22 columnar extension
3 base sheet
31 air intake hole
32 positioning column
33 fastener
4 signal electrode slice
41 air vent
42 positioning hole
43 pin passing hole
44 gap
5 insulating spacer
51 air vent
52 locating hole
53 pin passing hole
6 offset electrode slice
61 air vent
62 positioning hole
63 insertion pin through hole
64 gap
7 casing
71 location hole
72 light incident hole
73 pin passing hole
74 fastener
75 plane part
76 fence
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structure are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Spatially relative terms, such as "under," "below," "lower," "below," "over," "upper," and the like, may be used herein for convenience in describing the relationship of one element or feature to another element or feature illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Further, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. In order to keep the drawings as concise as possible, not all features of a single figure may be labeled in their entirety.
The signal detection device of the existing sensor usually or adopts a mode of connecting an electrode plate with an external device by a plurality of screws and a plurality of nuts, so that the device is large in size, the material stress at the fastening position of the screws is uneven, the whole detection device is easy to generate assembly deformation, and the detection precision is influenced; or the shell of the detection device is assembled by ultrasonic welding, but the relative space position between the electrode plates is easy to displace under the strong vibration of ultrasonic waves, the consistency of products is not ideal enough, and the detection device cannot be disassembled for maintenance. Some detection devices adopt part edge positioning, but higher requirements are put forward on the machining precision of parts, so that the cost of products is increased, and even so, the positioning precision is still not high, and the consistency of the products is not good. In view of the above, the inventors of the present application have made a long-term study and have proposed an improvement.
Specifically, as shown in fig. 1 to 4, the present invention provides a signal detection device, which includes a first pin connector 1, a second pin connector 2, and a base sheet 3, a signal electrode sheet 4, an insulating spacer sheet 5, an offset electrode sheet 6 and a cover sheet 7 stacked in sequence from top to bottom, wherein the signal electrode sheet 4 and the offset electrode sheet 6 are conductive electrodes, usually metal sheets, as their names mean, and the insulating spacer sheet 5 is an insulating material (the material of the cover sheet 7 and the base sheet 3 is also an insulating material), the insulating spacer sheet 5 spaces the signal electrode sheet 4 and the offset electrode sheet 6 in parallel to avoid electrical contact therebetween, the base sheet 3 is provided with a plurality of air inlets 31, the cover sheet 7 is provided with a plurality of light incident holes 7 and a plurality of pin through holes 72, the signal electrode sheet 4, the insulating spacer sheet 5 and the offset electrode sheet 6 are provided with vent holes, one end of the first pin connector 1 is connected with the signal electrode plate 4 to form a signal electrode component, and the other end of the first pin connector 1 passes through the pin through hole 53 on the insulating spacer 5 and extends upwards to be fixed in the pin through hole 73 of the housing 7; one end of the second pin connector 2 is connected with the offset electrode plate 6 to form an offset electrode assembly, and the other end of the second pin connector 2 extends upwards and is fixed in the other pin through hole 73 of the cover 7; the cover case 7 and the base sheet 3 are fixed to each other, and the signal electrode piece 4, the insulating spacer 5 and the offset electrode piece 6 are fixed in a space formed by fixedly connecting the cover case 7 and the base sheet 3, thereby forming a detection space in the space formed by the cover case 7 and the base sheet 3. When the device is used, fixed direct current bias voltage is applied between the signal electrode plate 4 and the bias electrode plate 6, gas to be detected enters a detection space through the air inlet hole 31 on the substrate plate 3, the vent hole 41 of the signal electrode plate 4, the vent hole 51 of the insulating spacer 5 and the vent hole 61 of the bias electrode plate 6 in sequence, ultraviolet rays emitted by an ultraviolet lamp positioned outside the housing 7 enter the detection space through the light incident hole 72 of the housing 7, VOC gas in the space is ionized into positive ions and electrons, the positive ions and the electrons move towards the signal electrode plate 4 and the bias electrode plate 6 respectively under the action of an electric field and are collected and converted into weak current signals, the magnitude of the current is in direct proportion to the concentration of the VOC gas, and the weak current signals are amplified by a detection circuit and finally converted into VOC concentration readings to realize detection. The utility model designs each module of the signal detection device into independent structure, can be assembled according to the need, can greatly improve the long-term stability of the signal detection device, reduce the manufacturing cost, and simultaneously can effectively reduce the external dimension of the signal detection device, which is beneficial to the development of gas sensors, especially PID sensors and GC sensors, towards miniaturization direction.
In one example, the first pin connector 1 and the second pin connector 2 extend to opposite sides of the light incident hole of the housing 7, and accordingly, the two pin passing holes 72 of the housing 7 and the two pin passing holes 53 of the insulating spacer 5 are correspondingly located at opposite sides, so as to prevent the first pin connector 1 and the second pin connector 2 from contacting each other, while making the whole signal detection device more balanced as a whole.
In one example, each of the first pin connector 1 and the second pin connector 2 includes a flat portion to be welded and fixed to a flat surface of the corresponding electrode tab, and a columnar extension portion connected to the flat portion and having one end extending downward through the pin passage hole of the corresponding electrode tab and the other end extending upward into the pin passage hole of the cover 7 and extending to the outside of the cover 7. As can be seen by referring to fig. 3 and 4, the flat surface portion 11 of the first pin connector 1 is fixed by welding to the surface of the signal electrode pad 4, and the columnar extension portion 12 thereof passes through the pin passing hole 43 of the signal electrode pad 4, and has one end extending into the pin passing hole 73 of the housing 7 and the other end extending to slightly protrude from the surface of the signal electrode pad 4, so that the first pin connector 1 and the signal electrode pad 4 are sufficiently fixedly connected. Similarly, the flat portion 21 of the second pin connector 2 is fixed by welding to the surface of the offset electrode plate 6, and the cylindrical extension portion 22 thereof passes through the pin passing hole 63 of the offset electrode plate 6, and has one end extending into the pin passing hole 73 of the housing 7 and the other end extending to slightly protrude from the surface of the offset electrode plate 6, so that the second pin connector 2 and the offset electrode plate 6 are sufficiently fixedly connected.
In one example, the vent holes on the signal electrode plate 4, the insulating spacer 5 and the offset electrode plate 6 have the same structure and vertically correspond to each other, and vertically correspond to the light incident hole 72 of the housing 7, and the vent holes 41 of the signal electrode plate 4, the vent holes 51 of the insulating spacer 5 and the vent holes 61 of the offset electrode plate 6 are preferably multiple and arrayed in the center of each of the vent holes, and are located on the same vertical line with the light incident hole 72 of the housing 7. This helps the gas to get into the quick even diffusion in the signal detection device back, helps improving detection speed and precision.
In an example, the substrate sheet 3 is further provided with a plurality of positioning posts 32, for example, two positioning posts, which are disposed on two opposite sides of the substrate sheet 3, and the signal electrode sheet 4, the insulating spacer 5, the offset electrode sheet 6 and the cover 7 are correspondingly provided with a plurality of positioning holes, and the positioning posts sequentially pass through the positioning holes 42 of the signal electrode sheet 4, the positioning holes 52 of the insulating spacer 5, the positioning holes 62 of the offset electrode sheet 6 and the positioning holes 71 of the cover 7, which helps to improve the assembly precision and the stability of the signal detection device.
In one example, the signal electrode pads 4 and the offset electrode pads 6 are both plate-shaped (the insulating spacers 5 are also plate-shaped), the signal electrode pads 4 are formed with arc-shaped notches 44 at positions corresponding to the second pin connectors 2 to prevent the second pin connectors 2 from contacting the signal electrode pads 4, and the offset electrode pads 6 are formed with arc-shaped notches 64 at positions corresponding to the first pin connectors 1 to prevent the first pin connectors 1 from contacting the offset electrode pads 6. And in one example, an arc-shaped spacing groove is formed between the portion of the signal electrode pad 4 where the pin passing hole 43 is located and the main body portion of the signal electrode pad 4 (i.e., the portion where the vent hole 41 is located) (but still connected to each other), so that the position of the pin passing hole 43 can be slightly adjusted as needed, contributing to the improvement of the assembly flexibility of the signal detection device. The structure of the offset electrode plate 6 is the same as that of the offset electrode plate, and details thereof are omitted.
In one example, the housing 7 includes a flat portion 75 and a rail 76, one end of the rail 76 is connected to an edge of the flat portion 75, and the other end extends in a longitudinal direction, so that a space having a certain depth is formed in the housing 7, the space is to be a gas collection and detection space, the light incident hole 72 and the pin passing hole 73 are provided on the flat portion 75, and the substrate sheet 3 is located inside the rail 76. In a further example, the inner side of the fence 76 is provided with a plurality of buckles 74, the edge of the substrate 3 is correspondingly provided with a plurality of buckles 33, and the buckles 74 on the inner side of the fence 76 and the buckles 33 on the edge of the substrate 3 are correspondingly buckled one to one, so that the stability of the signal detection device can be further improved. And the signal detection device is very convenient to mount and dismount by adopting a buckle structure. Of course, in other examples, the cover 7 and the base sheet 3 may be fixed by other connection methods such as hinge, socket, etc., which is not limited strictly.
In order to make the technical solution and advantages of the present invention more prominent, the following exemplifies the assembly process of the signal detection device of the present invention;
1. welding and fixing the signal electrode plate 4 and the first pin connector 1 to form a signal electrode assembly; in the soldering, the columnar extension portion 12 of the first pin connector 1 is inserted through the pin passage hole 43 of the signal electrode pad 4, and the flat surface portion 11 of the first pin connector 1 is soldered to the signal electrode pad 4.
2. Welding and fixing the offset electrode plate 6 and the second pin connector 2 to form an offset electrode assembly; in the welding, the columnar extension portion 22 of the second pin connector 2 is inserted through the pin passage hole 63 of the offset electrode piece 6, and the flat surface portion 21 of the second pin connector 2 is welded and fixed to the offset electrode piece 6.
3. The positioning holes 42 of the signal electrode plate 4, the positioning holes 52 of the insulating spacer 5, the positioning holes 62 of the offset electrode plate 6 and the positioning holes 71 of the housing 7 are sequentially arranged on the substrate plate 3 through the positioning posts 32, the substrate plate 3, the signal electrode assembly, the insulating spacer 5, the offset electrode assembly and the housing 7 are stacked together in a stacking mode, and the fasteners 33 on the substrate plate 3 are fastened with the fasteners 74 on the housing 7, so that the whole signal detection device is integrated. The signal detection device provided by the utility model can be used in various sensors, in particular various photoion detection sensors.
Therefore, the utility model also provides a sensor, which comprises the signal detection device in any one of the above aspects. For more description of the signal detection apparatus, please refer to the foregoing, and for brevity, the description is omitted. The sensor usually further includes an ultraviolet light source located outside the signal detection device and emitting ultraviolet light through a light incident hole on the housing, and further includes a detection circuit connected to the bias electrode plate and the signal electrode plate, and the like. Since this part of the structure is similar to the prior art, it is not developed one by one. The sensor is preferably a photo-ion detection sensor, including but not limited to any of a gas chromatography sensor and a PID sensor. By adopting the signal detection device, the sensor has the advantages of easy installation and disassembly, good long-term stability of products, low manufacturing cost and the like, and the size of the sensor can be further reduced.
In summary, the present invention provides a signal detection device and a sensor. The signal detection device comprises a first pin connector, a second pin connector, a substrate piece, a signal electrode piece, an insulating spacer piece, a bias electrode piece and a housing, wherein the substrate piece, the signal electrode piece, the insulating spacer piece, the bias electrode piece and the housing are sequentially stacked up and down; one end of the second pin connector is connected with the offset electrode plate, and the other end of the second pin connector extends upwards and is fixed in the other pin passing hole of the housing; the cover and the base sheet are fixed to each other. The utility model designs each module of the signal detection device into independent structure, can be assembled according to the need, can greatly improve the long-term stability of the signal detection device, reduce the manufacturing cost, and simultaneously can effectively reduce the external dimension of the signal detection device, which is beneficial to the development of gas sensors, especially PID sensors and GC sensors, towards miniaturization direction. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A signal detection device is characterized by comprising a first pin connector, a second pin connector, a substrate, a signal electrode plate, an insulating spacer, an offset electrode plate and a housing, wherein the substrate, the signal electrode plate, the insulating spacer, the offset electrode plate and the housing are sequentially stacked up and down; one end of the second pin connector is connected with the offset electrode plate, and the other end of the second pin connector extends upwards and is fixed in the other pin through hole of the housing; the cover and the base sheet are fixed to each other.
2. The signal detection device of claim 1, wherein the first and second pin connectors extend to opposite sides of a light entrance aperture of the housing.
3. The signal detection device according to claim 1, wherein each of the first pin connector and the second pin connector includes a flat surface portion to which the flat surface of the corresponding electrode pad is fixed by welding, and a columnar extension portion connected to the flat surface portion and having one end extending downward through the pin passage hole of the corresponding electrode pad and the other end extending upward into the pin passage hole of the housing and extending to the outside of the housing.
4. The signal detection device according to claim 1, wherein the vent holes on the signal electrode plate, the insulating spacer plate and the offset electrode plate have the same structure and correspond up and down to the light incident hole of the housing.
5. The signal detection device according to claim 1, wherein the base plate further comprises a plurality of positioning posts, the signal electrode plate, the insulating spacer, the offset electrode plate and the housing are correspondingly provided with a plurality of positioning holes, and the positioning posts sequentially penetrate through the positioning holes of the signal electrode plate, the insulating spacer, the offset electrode plate and the housing.
6. The signal detection device of claim 1, wherein the signal electrode pads and the offset electrode pads are each of a plate-like structure, the signal electrode pads are formed with notches at positions corresponding to the second pin connectors, and the offset electrode pads are formed with notches at positions corresponding to the first pin connectors.
7. The signal detection device according to claim 1, wherein the housing includes a flat portion and a rail, one end of the rail is connected to an edge of the flat portion, the other end of the rail extends in a longitudinal direction, the light incident hole and the pin passing hole are provided in the flat portion, and the substrate sheet is located in the rail.
8. The signal detection device according to claim 7, wherein a plurality of fasteners are disposed on an inner side of the rail, a plurality of fasteners are disposed on an edge of the substrate sheet, and the fasteners on the inner side of the rail and the fasteners on the edge of the substrate sheet are fastened in a one-to-one correspondence manner.
9. A sensor, characterized in that it comprises a signal detection device according to any one of claims 1-8.
10. The sensor of claim 9, wherein the sensor comprises any one of a gas chromatography sensor and a PID sensor.
Priority Applications (1)
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CN202122789835.8U CN216978791U (en) | 2021-11-15 | 2021-11-15 | Signal detection device and sensor |
Applications Claiming Priority (1)
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CN202122789835.8U CN216978791U (en) | 2021-11-15 | 2021-11-15 | Signal detection device and sensor |
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CN216978791U true CN216978791U (en) | 2022-07-15 |
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CN202122789835.8U Active CN216978791U (en) | 2021-11-15 | 2021-11-15 | Signal detection device and sensor |
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