CN219625454U - Gas sensor performance testing device - Google Patents

Abstract

The utility model belongs to the technical field of testing equipment and provides a gas sensor performance testing device. The testing device includes a test body, a cavity cover and a gas sensor base; a test cavity is formed inside the test body, and the test cavity is spindle-shaped. The side wall of the test body is provided with an air inlet and an air outlet communicating with the test chamber; the chamber cover is arranged in the test chamber; the gas sensor base is arranged in the installation chamber. The gas sensor performance testing device provided by the embodiment of the utility model is designed into a spindle-shaped structure through the test cavity inside the test body. Compared with the square structure, the spindle-shaped structure can effectively reduce the volume of the test body and test the air intake of the side wall of the body. The test of the gas replacement efficiency can be realized by the gas outlet and the gas outlet, and at the same time, a low Reynolds number and a stable gas flow field can be maintained inside the test cavity of the spindle-shaped structure, which can realize the accurate test of the performance of the gas sensor.

Description

Gas sensor performance test device

technical field

The utility model relates to the technical field of testing equipment, in particular to a gas sensor performance testing device.

Background technique

With the advancement of science and technology, the performance requirements of gas sensors are getting higher and higher, and some occasions put forward extremely high conditions for the response time and sensitivity of gas sensors.

The performance evaluation device of the gas sensor is a kind of equipment used to test the performance of the gas sensor. However, compared with the rapid development of the gas sensor, the performance evaluation device of the gas sensor is relatively lagging behind. At present, the test chamber of the performance evaluation device mostly adopts a square structure, which has problems such as large volume, low gas replacement efficiency, fluency and instability, so that the final performance evaluation parameters cannot truly reflect the performance of the gas sensor, which in turn affects the actual use scene and life of the gas sensor. Therefore, how to It is particularly important to accurately evaluate the performance of gas sensors.

Utility model content

The utility model provides a gas sensor performance testing device, which is used to solve the problems of large volume, low gas replacement efficiency, unstable flow and inability to truly reflect the performance of the gas sensor in the prior art.

The utility model provides a gas sensor performance testing device, comprising:

A test body, a test chamber is formed inside the test body, the test chamber is spindle-shaped, and the side wall of the test body is provided with an air inlet and an air outlet connected to the test chamber;

a chamber cover, arranged in the test chamber;

The gas sensor base is set in the test cavity.

According to an embodiment of the utility model, a gas sensor performance test device is provided, the test chamber includes an air inlet chamber, an installation chamber and an air outlet chamber connected in sequence, the air inlet chamber communicates with the air inlet, and the air outlet chamber communicating with the gas outlet;

The cross-sectional size of the air inlet chamber gradually increases along the air inlet toward the installation chamber, and the cross-sectional size of the air outlet chamber gradually decreases along the installation chamber toward the air outlet.

According to an embodiment of the present invention, a gas sensor performance testing device is provided, and the testing body includes:

a cavity, forming the test cavity inside;

a support part connected to the cavity;

The chamber cover includes:

a support cover, openably and closably connected to the support portion;

The sealing cover is arranged on the supporting cover and is suitable for connecting with the testing cavity.

According to an embodiment of the present utility model, a gas sensor performance testing device is provided, and the sealing cover includes:

a sealing part adapted to be disposed in the test chamber;

The abutting portion is adapted to abut against the supporting portion.

According to an embodiment of the present utility model, a gas sensor performance testing device is provided, and the support part is provided with a sealing ring that cooperates with the abutment part.

According to an embodiment of the present invention, a gas sensor performance testing device is provided, and the gas sensor base includes:

The circuit board is arranged on the bottom wall of the installation cavity; the circuit board has a test circuit;

The pin socket is connected to the circuit board.

According to an embodiment of the present utility model, a gas sensor performance testing device is provided, and the circuit board further has at least one of a heating circuit and a protection circuit.

According to an embodiment of the present invention, a gas sensor performance testing device is provided, and the gas sensor base further includes:

a base plate, detachably connected to the bottom wall of the installation cavity;

The circuit board is mounted on the substrate.

According to an embodiment of the present invention, a gas sensor performance testing device is provided, further comprising:

The monitoring element is arranged in the test cavity.

According to an embodiment of the present utility model, a gas sensor performance testing device is provided, and the monitoring element includes at least one of a temperature monitor, a humidity monitor, and a pressure monitor.

The gas sensor performance testing device provided by the embodiment of the utility model is designed into a spindle-shaped structure through the test cavity inside the test body. Compared with the square structure, the spindle-shaped structure can effectively reduce the volume of the test body and test the air intake of the side wall of the body. The test of the gas replacement efficiency can be realized by the gas outlet and the gas outlet, and at the same time, a low Reynolds number and a stable gas flow field can be maintained inside the test cavity of the spindle-shaped structure, which can realize the accurate test of the performance of the gas sensor.

Description of drawings

In order to more clearly illustrate the technical solutions in the utility model or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are For some embodiments of the present utility model, for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work.

Fig. 1 is a schematic structural view of a gas sensor performance testing device provided by an embodiment of the present invention;

Fig. 2 is the front view of the test body provided by the embodiment of the present invention;

Fig. 3 is a side view of the test body provided by the embodiment of the present invention;

Fig. 4 is the rear view of the test body provided by the embodiment of the present invention;

Fig. 5 is a front view of the chamber cover provided by the embodiment of the present invention;

Fig. 6 is a side view of the chamber cover provided by the embodiment of the present invention;

Fig. 7 is a front view of the gas sensor base provided by the embodiment of the present invention;

Fig. 8 is a side view of the gas sensor base provided by the embodiment of the present invention.

Reference signs:

1. Chamber cover; 11. Seal cover; 12. Support cover;

2. Test body; 21. Cavity; 22. Supporting part; 23. Test chamber; 231. Air intake chamber; 232. Installation chamber; 233. Air outlet chamber; 24. Air inlet; 25. Air outlet; 26. Seal lock up;

3. Gas sensor base; 31. Substrate; 32. Pin seat; 33. Circuit board.

Detailed ways

The implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" ", "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description The embodiments and simplified descriptions of the present invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the embodiments of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

In the embodiments of the present utility model, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature may pass through Intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

The gas sensor performance testing device according to the embodiment of the present invention will be described below with reference to FIGS. 1-8 .

Fig. 1 illustrates the structural representation of the gas sensor performance test device that the utility model embodiment provides, as shown in Fig. 1, this gas sensor performance test device comprises test body 2, chamber cover 1 and gas sensor base 3; Wherein, test A test chamber 23 is formed inside the body 2, and the test chamber 23 is spindle-shaped. The side wall of the test body 2 is provided with an air inlet 24 and an air outlet 25 communicating with the test chamber 23; the chamber cover 1 is arranged in the test chamber 23; the gas sensor base The table 3 is set in the test cavity 23 .

It can be understood that when the chamber cover 1 is placed in the test chamber 23 of the test body 2 , the test chamber 23 is sealed by the chamber cover 1 , and at this time, the interior of the test chamber 23 is in a completely sealed state.

It can be understood that the test cavity 23 inside the test body 2 is spindle-shaped, conforming to the characteristics of fluid movement, allowing gas to enter the test cavity 23 through the gas inlet 24 and maintaining a low Reynolds number and a stable gas flow field.

It should be noted that the test chambers of the existing gas sensor performance evaluation devices mostly adopt a square structure, and an air inlet 24 is arranged on the side wall of the test chamber, and the gas sensor performance in the test chamber is ventilated through the air inlet 24. test, but part of the gas entering the test chamber through the air inlet 24 will stay in the test chamber (such as the four corners of the test chamber), causing the air flow in the test chamber to be unstable, so that the final performance evaluation parameters cannot be obtained. It truly reflects the performance of the gas sensor, and then affects the actual use scene and life of the gas sensor. In the embodiment of the utility model, the test chamber 23 is designed as a spindle-shaped structure, which conforms to the characteristics of fluid motion, and maintains a low Reynolds number and a stable gas flow field inside, so that the final performance evaluation parameters can truly reflect the performance of the gas sensor.

It should be noted that, for the static test of the gas sensor, the test chamber of the gas sensor performance evaluation device is only provided with the air inlet 24, and the gas in the test chamber cannot be discharged, so the test of the gas replacement efficiency cannot be realized. However, in the embodiment of the present invention, an air inlet 24 and an air outlet 25 are provided on the side wall of the test body 2, so as to realize the test of gas replacement efficiency.

It should be noted that for the dynamic testing of gas sensors, the test chambers of gas sensor performance evaluation devices mostly adopt a square structure. The problem is that part of the gas entering the test chamber through the air inlet 24 will stay in the test chamber, resulting in unstable air flow inside the test chamber, which will lead to problems such as low gas replacement efficiency and serious adsorption. In the embodiment of the utility model, the test chamber 23 is designed as a spindle-shaped structure, and the gradual expansion angle is not more than 29°, which conforms to the characteristics of fluid motion, and maintains a low Reynolds number and a stable gas flow field inside, which can respond to the recovery time and sensitivity of the gas sensor. , selectivity and other evaluation indicators for accurate testing.

The gas sensor performance test device provided by the embodiment of the utility model is designed into a spindle-shaped structure through the test cavity 23 inside the test body 2. Compared with the square structure, the spindle-shaped structure can effectively reduce the volume of the test body 2, and the test body 2 side The gas inlet 24 and the gas outlet 25 of the wall can realize the test of the gas replacement efficiency, and at the same time, the interior of the test chamber 23 of the spindle structure maintains a low Reynolds number and a stable gas flow field, which can realize the accurate test of the performance of the gas sensor.

In one embodiment of the present invention, Fig. 2 illustrates the front view of the test body provided by the embodiment of the present invention, Fig. 3 illustrates the side view of the test body provided by the embodiment of the present invention, Fig. 4 illustrates the test body provided by the embodiment of the present invention The rear view of the test body provided by the novel embodiment, as shown in Fig. 2, Fig. 3 and Fig. 4, the test chamber 23 includes an air inlet chamber 231, an installation chamber 232 and an air outlet chamber 233 connected in sequence, and the air inlet chamber 231 is connected to the air inlet chamber. The port 24 communicates, and the air outlet chamber 233 communicates with the air outlet 25; the cross-sectional size of the air inlet chamber 231 gradually increases along the air inlet 24 to the installation chamber 232, and the cross-sectional size of the air outlet chamber 233 gradually increases along the installation chamber 232 to the air outlet 25. decrease.

It can be understood that the test chamber 23 includes an installation chamber 232 located in the middle, and an air inlet chamber 231 and an air outlet chamber 233 respectively located on both sides of the installation chamber 232. The outlet end of the chamber 231 communicates with one end of the installation chamber 232 , the other end of the installation chamber 232 communicates with the inlet end of the air outlet chamber 233 , and the outlet end of the air outlet chamber 233 communicates with the air outlet 25 . The air inlet chamber 231 is used as the air inlet end of the test chamber 23, and the air outlet chamber 233 can be used as the air outlet end of the test chamber 23. The air inlet 24 gradually increases toward the installation chamber 232, and the air outlet chamber 233 (air outlet) is a tapered structure, so the cross-sectional size of the air outlet chamber 233 gradually decreases along the installation chamber 232 toward the air outlet 25, that is, the air inlet chamber The cross-sectional size of 231 gradually increases from the inlet end of the air inlet chamber 231 to the outlet end of the air inlet chamber 231 , and the cross-sectional size of the air outlet chamber 233 gradually increases from the inlet end of the air outlet chamber 233 to the outlet end of the air outlet chamber 233 .

It can be understood that the inlet chamber 231 (inlet end) of the test chamber 23 is a gradually flared structure, and the air outlet chamber 233 (air outlet) is a tapered structure, and the gradually flared mouth of the inlet end and the tapered mouth of the air outlet The included angles are all less than or equal to 29°, satisfying the characteristics of fluid movement, less energy loss of air flow, and ensuring the internal laminar flow state, so that accurate testing of gas sensor performance can be realized.

It can be understood that the gas sensor base 3 is disposed in the installation cavity 232 . It can be understood that the structure of the air inlet cavity 231 and the air outlet cavity 233 can be the same, and they are distributed symmetrically with the installation cavity 232 .

In one embodiment of the present invention, the size of the inlet end of the air inlet chamber 231 is adapted to the size of the air inlet 24 , and the size of the outlet end of the air outlet chamber 233 is adapted to the size of the air outlet 25 .

It can be understood that the inlet end of the air inlet chamber 231 is a square structure, and the air inlet 24 can be the same square hole as the square structure, or a center hole corresponding to the square structure; The design of the air outlet 25 is the same as that of the inlet port of the air inlet chamber 231 and the air inlet 24 , and will not be repeated here in this embodiment.

According to the embodiment of the present utility model, one end of the test body 2 and one end of the chamber cover 1 are connected by a hinge, and the other end of the test body 2 and the other end of the chamber cover 1 are fixed by a fastening switch; the gas sensor base 3 and the test body 2 Connected by thread; when the chamber cover 1 is closed on the test body 2 by fastening the switch, except for the air inlet 24 and the air outlet 25, the inside of the test body 2 is in a completely sealed state; the inside of the test body 2 is spindle-shaped The structure conforms to the characteristics of fluid movement, and the interior maintains a low Reynolds number and a stable gas flow field.

In one embodiment of the present utility model, as shown in Fig. 2, Fig. 3 and Fig. 4, test body 2 comprises two parts, is respectively cavity 21 and support part 22, and the inside of cavity 21 forms test cavity 23; The part 22 is arranged at the end of the chamber body 21 away from the bottom wall of the test chamber 23 , and the supporting part 22 is used for connecting with the chamber cover 1 .

According to the embodiment of the present invention, Fig. 5 illustrates the front view of the chamber cover provided by the embodiment of the present invention, and Fig. 6 illustrates the side view of the chamber cover provided by the embodiment of the present invention, as shown in Fig. 5 and Fig. 6 , The chamber cover 1 comprises two parts, respectively an external support cover 12 and an internal sealing cover 11, and the sealing cover 11 is fixedly connected to one side of the support cover 12; wherein, the support cover 12 is openably and closably connected to the support portion 22; When the cover 12 is connected to the supporting part 22 , the sealing cover 11 is suitable for connecting with the test cavity 23 to realize the sealing of the test cavity 23 .

It can be understood that the sealing cover 11 can be made of low adsorption, low release, high temperature resistant materials, such as PEEK (polyether ether ketone) material, etc., and the support cover 12 can be made of low adsorption metal materials, such as stainless steel, for use in testing The main body 2 is connected and plays a supporting role at the same time to ensure that the sealing cover 11 maintains a fixed shape and does not deform under any circumstances.

It can be understood that the sealing cover 11 plays the role of sealing the test cavity 23. The sealing cover 11 has a two-layer structure, the outer layer is the abutting part, the inner layer is the sealing part, and the sealing part of the inner layer is adapted to the test cavity 23. Spindle-shaped structure, the abutting portion of the outer layer is adapted to the exposed supporting portion 22 of the test body 2 .

In one embodiment of the present utility model, the middle part of the outer surface of the support part 22 has an accommodating groove for matching with the abutting part. When the sealing part is connected to the test cavity 23, the abutting part connected with the sealing part is located In the groove, the support part 22 is provided with a sealing ring 26 located on the outer periphery of the abutting part, and the sealing ring 26 keeps the test body 2 and the chamber cover 1 airtight when connected.

In one embodiment of the present utility model, Fig. 7 illustrates the front view of the gas sensor base provided by the embodiment of the present utility model, and Fig. 8 illustrates the side view of the gas sensor base provided by the embodiment of the present utility model, as shown in Fig. 7 and 8, the gas sensor base 3 is used to install the gas sensor to be measured. The gas sensor base 3 includes a circuit board 33 and a pin seat 32; wherein, the circuit board 33 is arranged on the bottom wall of the installation cavity 232; The pin socket 32 is connected to the circuit board 33 .

Further, the gas sensor base 3 further includes a base plate 31 , the base plate 31 is detachably connected to the bottom wall of the installation cavity 232 , and the circuit board 33 is mounted on the base plate 31 .

It can be understood that the circuit board 33 is mounted on the bottom wall of the installation cavity 232 through the base plate 31 , and the base plate 31 is detachably connected, which facilitates quick replacement of the circuit board 33 .

It can be understood that the circuit board 33 has a test circuit, and the test circuit can be used with an external test platform to realize the performance test of the gas sensor to be tested.

It can be understood that the pin base 32 is used to install the gas sensor to be measured, so the position of the pin base 32 is not unique, and the position and size of the pin base 32 can be adjusted according to the actual structure of the gas sensor to be measured to meet the needs of different gases. The testing requirements of the sensor; the pin seat 32 can be made of gold-plated material on a nickel base, which is convenient for signal transmission and meets the rapid replacement requirements of the circuit board 33 .

It should be noted that the pin block 32 includes a plurality of pins arranged vertically on the circuit board 33, and the adjustment of the position of the pin block 32 may refer to the adjustment of the arrangement of multiple pins, or the adjustment of the number of pins. ; The adjustment of the size of the pin seat 32 can be the adjustment of the diameter of the pin, or the adjustment of the axial length of the pin.

It should be noted that the position and size of the pin seat 32 should be adjusted so that the gas sensor to be tested is installed on the pin seat 32, and the orientation of the gas inlet 24 and the gas outlet 25 on the test chamber 23 is facing the direction of the gas sensor. Sensitive location.

It can be understood that the internal height of the test chamber 23 should be designed so that the sensitive position of the gas sensor is just in the middle after the gas sensor is installed, and the positions of the air inlet 24 and the gas outlet 25 are also at half the height of the test chamber 23 .

It can be understood that the installation cavity 232 is provided with a sensor base installation port for connecting with the base plate 31 of the gas sensor base 3 , and the connection at this place may be a threaded connection, and the sensor base installation port is a threaded structure.

In one embodiment of the present invention, the circuit board 33 also has at least one of a heating circuit and a protection circuit.

It can be understood that the circuit board 33 is a circuit board specially designed for gas sensors. In addition to the test circuit, it can also have a heating circuit and a protection circuit. The heating circuit can adjust the voltage required for heating, and the protection circuit can monitor the gas sensor. Cut off to prevent possible damage to the gas sensor and equipment; the heating circuit and protection circuit can be determined according to the actual sensor type.

In one embodiment of the present invention, the testing device further includes a monitoring element disposed in the testing cavity 23 .

It can be understood that the monitoring element is used to monitor the temperature, humidity and pressure inside the test body 2 in real time, and the monitoring element can be at least one of a temperature monitor, a humidity monitor, and a pressure monitor.

It should be noted that the monitoring component can also be other measuring components, which are set according to the actual test needs. For example, the monitoring component is a gas concentration monitor; different temperature and humidity, pressure, concentration and other sensor detection equipment can be installed according to the actual monitoring requirements. .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present utility model. and range.

Claims (10)

1. A gas sensor performance testing apparatus, comprising:

the testing device comprises a testing body (2), wherein a testing cavity (23) is formed in the testing body (2), the testing cavity (23) is in a spindle shape, and an air inlet (24) and an air outlet (25) which are communicated with the testing cavity (23) are formed in the side wall of the testing body (2);

the cavity cover (1) is arranged in the test cavity (23);

and a gas sensor base (3) provided in the test chamber (23).

2. The gas sensor performance test device according to claim 1, wherein the test chamber (23) comprises an air inlet chamber (231), a mounting chamber (232) and an air outlet chamber (233) which are sequentially communicated, the air inlet chamber (231) is communicated with the air inlet (24), and the air outlet chamber (233) is communicated with the air outlet (25);

the cross-sectional dimension of the air inlet cavity (231) gradually increases along the air inlet (24) to the mounting cavity (232), and the cross-sectional dimension of the air outlet cavity (233) gradually decreases along the mounting cavity (232) to the air outlet (25).

3. The gas sensor performance testing apparatus according to claim 2, wherein the testing body (2) comprises:

a cavity (21) in which the test chamber (23) is formed;

a support (22) connected to the cavity (21);

the chamber cover (1) comprises:

a support cover (12) which is connected to the support part (22) in an openable and closable manner;

and the sealing cover (11) is arranged on the supporting cover (12) and is suitable for being connected with the testing cavity (23).

4. A gas sensor performance test apparatus according to claim 3, wherein the sealing cover (11) comprises:

a sealing part adapted to be arranged in the test chamber (23);

and an abutting part adapted to abut against the supporting part (22).

5. The gas sensor performance test apparatus according to claim 4, wherein the support portion (22) is provided with a seal ring (26) that mates with the abutment portion.

6. The gas sensor performance test apparatus according to any one of claims 2 to 5, wherein the gas sensor base (3) comprises:

a circuit board (33) provided on the bottom wall of the mounting chamber (232); the circuit board (33) has a test circuit;

and a socket holder (32) connected to the circuit board (33).

7. The gas sensor performance test apparatus of claim 6, wherein the circuit board (33) further has at least one of a heating circuit and a protection circuit.

8. The gas sensor performance test apparatus according to claim 6, wherein the gas sensor base (3) further comprises:

a base plate (31) detachably attached to a bottom wall of the mounting chamber (232);

the circuit board (33) is mounted on the substrate (31).

9. The gas sensor performance test apparatus according to any one of claims 1 to 5, further comprising:

and the monitoring element is arranged in the test cavity (23).

10. The gas sensor performance testing apparatus of claim 9, wherein the monitoring element comprises at least one of a temperature monitor, a humidity monitor, and a pressure monitor.