Gas sensor detection device

Abstract

The utility model relates to the field of detection devices, in particular to a gas sensor detection device. Comprising a first box body and a second box body, the second box body is filled with test gas and is connected with the first box body through a connecting pipeline, and a gas valve is arranged on the connecting pipeline and used for controlling connection and disconnection of the connecting pipeline; a barometer is arranged at one end, far away from the second box body relative to the air valve, of the first box body or the connecting pipeline and is used for detecting the air pressure in the first box body; a gas sensor to be detected is arranged in the first box body. The test gas is arranged in the second box body, the gas sensor to be detected is arranged in the first box body, the first box body and the second box body are connected through the connecting pipeline with the gas valve, and the barometer is arranged on the pipeline. By recording the air pressure of the test gas sequentially entering the first box body and the detection value of the corresponding gas sensor at the time and judging whether the equal proportion relation exists or not, the detection function of the device on the gas sensor is achieved.

Description

Technical Field

[0001] The utility model relates to the field of detection devices, in particular to a gas sensor detection device. Background Art

[0002] High-precision gas sensors are crucial in industrial fields such as the automotive sector. To test the accuracy of gas sensors, it is necessary to construct a gas sensor detection device that can provide high-precision, stable standard gas. For example, a sensor for detecting the concentration of NOx gases (including NO and NO2) in automobile exhaust requires a conventional gas sensor detection device to provide a standard gas to simulate automobile exhaust. A NOx concentration sensor based on a photochemical reaction measures the standard gas to obtain a standard measurement value. Simultaneously, the gas sensor being tested detects the standard gas to obtain a measurement value. The accuracy of the gas sensor being tested is determined based on the standard measurement value and the measurement value of the gas sensor being tested.

[0003] Since the accuracy of the standard measurement value cannot be further verified, this reduces the confidence in the accuracy of the gas sensor being measured. Utility Model Content

[0004] The purpose of the utility model is to provide a gas sensor detection device to solve the problem in the prior art that the measurement accuracy of the gas sensor is difficult to be further verified.

[0005] The technical solution of the utility model is: a gas sensor detection device, including a first box and a second box, the second box is filled with test gas and is connected to the first box through a connecting pipe, the connecting pipe is provided with a gas valve for controlling the on-off of the connecting pipe; a barometer is provided at one end of the first box or the connecting pipe away from the second box relative to the gas valve, for detecting the air pressure in the first box; the gas sensor to be detected is arranged in the first box.

[0006] Preferably, the first box and the second box are both configured as square structures, and the first box has a larger size than the second box.

[0007] Preferably, a gas uniformity mechanism is provided in both the first box and the second box, and the gas uniformity mechanism includes a base, and a fan and a distribution box for providing power are provided on the base.

[0008] Preferably, the gas uniformity mechanism further includes a heating plate, and the heating plate and the fan are both connected to an external controller via circuits.

[0009] Preferably, the heating plate is detachably connected to the base via a column, and the column forms a space for installing the distribution box between the lower surface of the heating plate and the upper surface of the base.

[0010] Preferably, the first box body and the second box body are provided with through holes, the circuit passes through the through holes and is connected to the controller, and sealant is coated at the through holes for sealing.

[0011] Preferably, the first box body and the second box body are made of transparent acrylic material.

[0012] Preferably, the edge length of the first box body is set to 18-22 cm, and the edge length of the second box body is set to 8-12 cm.

[0013] Preferably, the circuit uses alligator clip DuPont wire to achieve detachable connection of the fan, distribution box, heating plate and controller.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) The present application sets the test gas in the second box, sets the gas sensor to be detected in the first box, and connects the first box and the second box through a connecting pipe with a gas valve, and sets a barometer on the pipe. By recording the pressure of the test gas entering the first box in sequence and the detection value of the corresponding gas sensor at that time, and judging whether there is an equiproportional relationship between them, the device can detect the gas sensor.

[0016] (2) The present application is also provided with a gas uniformity mechanism, so that the gas in the first box and the second box can be quickly uniformed, and a heating plate is provided in the gas uniformity mechanism, so that certain "gases" that are liquid at room temperature can be vaporized, and then the corresponding gas sensors can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a structural diagram of a gas sensor detection device described in the present utility model;

[0019] Figure 2 This is a structural diagram of the gas uniformity mechanism described in the present utility model;

[0020] Wherein: 1. first box body, 2. second box body, 3. connecting pipe, 4. gas valve, 5. barometer, 6. gas uniformity mechanism, 61. base, 62. fan, 63. distribution box, 64. heating plate, 65. column, 7. controller. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0022] like Figure 1As shown, a gas sensor detection device comprises a first housing 1 and a second housing 2. The first housing 1 houses a gas sensor to be tested or calibrated, while the second housing 2 stores test gas. The first and second housings 1 and 2 are connected via a connecting pipe 3, which is provided with a valve 4 for on / off control. A barometer 5 is also provided near the portion of the valve 4 near the first housing 1 for detecting the air pressure within the first housing 1. By controlling the opening and closing of the valve 4, the test gas within the second housing 2 sequentially enters the first housing 1, and the pressure within the first housing 1 is indicated by the barometer 5. Because the amount of gas is proportional to its pressure, the test gas is introduced into the first housing 1 multiple times, resulting in different readings on the barometer 5. Each reading is then compared with the detection value of the gas sensor. Whether the reading is proportional to the detection value can be used to determine whether the gas sensor is functioning properly.

[0023] Specifically, both the first and second housings 1 and 2 are made of transparent acrylic and have a square structure. To allow the test gas to diffuse freely from the second housing 2 toward the first housing 1 after the gas valve 4 is opened, the second housing 2 is smaller than the first housing 1, thereby achieving a higher concentration of the test gas within. Specifically, the first housing 1 has a side length of 20 cm, while the second housing 2 has a side length of 10 cm.

[0024] In order to speed up the diffusion of the test gas and quickly and evenly distribute the test gas entering the first box 1, Figure 2 As shown, a gas uniformity mechanism 6 is provided in both the first box body 1 and the second box body 2. The gas uniformity mechanism 6 comprises a base 61 on which a fan 62 and a distribution box 63 for providing power are provided.

[0025] Some test gases are in liquid state at room temperature. Therefore, the gas uniformization mechanism 6 is also provided with a heating plate 64. In order to save space, the heating plate 64 is supported above the base 61 by four columns 65, so that a space for the installation of the distribution box 63 is formed between the lower surface of the heating plate 64 and the upper surface of the base 61.

[0026] Several through-holes are provided in the side walls of the first and second housings 1 and 2. Wiring passes through these through-holes, electrically connecting the heating plate 64 and fan 62 to an external controller 7. This allows the operator to control the heating plate 64 and fan 62 on and off via the controller 7. After the wiring passes through the through-holes, it is secured to the through-holes with sealant to maintain a sealed environment between the first and second housings 1 and 2. Furthermore, the wiring connecting the fan 62, heating plate 64, distribution box 63, and controller 7 utilizes DuPont cables with alligator clips, enabling removable connections between these components.

[0027] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A gas sensor detection device, characterized in that: The invention comprises a first box (1) and a second box (2), wherein the second box (2) is filled with a test gas and is connected to the first box (1) via a connecting pipe (3), wherein a gas valve (4) is provided on the connecting pipe (3) for controlling the on-off of the connecting pipe (3); a barometer (5) is provided on the first box (1) or the connecting pipe (3) at one end thereof, which is away from the second box (2) relative to the gas valve (4), for detecting the air pressure in the first box (1); and a gas sensor to be detected is provided in the first box (1).

2. A gas sensor detection device according to claim 1, characterized in that: The first box body (1) and the second box body (2) are both arranged in a square structure, and the first box body (1) has a larger size than the second box body (2).

3. A gas sensor detection device according to claim 2, characterized in that: A gas uniformity mechanism (6) is provided in both the first box (1) and the second box (2). The gas uniformity mechanism (6) comprises a base (61), a fan (62) is provided on the base (61), and a distribution box (63) for providing power.

4. A gas sensor detection device according to claim 3, characterized in that: The gas uniformity mechanism (6) further includes a heating plate (64), and the heating plate (64) and the fan (62) are both connected to an external controller (7) via a circuit.

5. A gas sensor detection device according to claim 4, characterized in that: The heating plate (64) is detachably connected to the base (61) via a column (65), and the column (65) forms a space for installing the distribution box (63) between the lower surface of the heating plate (64) and the upper surface of the base (61).

6. A gas sensor detection device according to claim 4, characterized in that: The first box body (1) and the second box body (2) are provided with through holes, the circuit passes through the through holes and is connected to the controller (7), and a sealant is applied at the through holes for sealing.

7. A gas sensor detection device according to claim 6, characterized in that: The first box body (1) and the second box body (2) are made of transparent acrylic material.

8. A gas sensor detection device according to claim 7, characterized in that: The edge length of the first box body (1) is set to 18-22 cm, and the edge length of the second box body (2) is set to 8-12 cm.

9. A gas sensor detection device according to claim 6, characterized in that: The circuit uses an alligator clip DuPont line to achieve detachable connection between the fan (62), the distribution box (63), the heating plate (64), and the controller (7).

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