Methane gas sensor module test equipment and system
By designing methane gas sensor module testing equipment, using the upper computer to communicate with the equipment, simultaneous testing of multiple sensor modules is achieved, and the existing testing methods are solved, which improves the testing efficiency and reduces the cost.
Patent Information
- Application Number
- CN202421507172.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing methane gas sensor module testing method is inefficient, resulting in the need of more testers and increased labor costs.
A methane gas sensor module testing equipment is designed, including a sensor module placement board and a channel switching control board. Through the upper computer and the equipment, simultaneous testing of the preset number of sensor modules is realized.
Improves testing efficiency, reduces labor costs, and reduces the possibility of human error by automated testing processes.
Smart Images
Figure CN223022066U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the technical field of product testing, and in particular, to a testing device and system for a methane gas sensor module. Background Art
[0002] With the extensive use of energy sources such as natural gas by people, the number of safety accidents caused by improper use of natural gas has been increasing continuously. Since the main component of natural gas is methane, in order to improve the safe use of natural gas energy, a methane gas sensor module is usually used to monitor the methane concentration in the user's indoor environment.
[0003] Since the methane gas sensor module is very closely related to the safe use of natural gas, when the methane gas sensor module leaves the factory, it usually needs to be comprehensively tested to ensure that the methane gas sensor module leaving the factory can be used normally.
[0004] Currently, usually testers test the methane gas sensor modules one by one. This detection method has low efficiency. In order to improve the testing efficiency, usually a large number of testers test together, which will face a high testing labor cost. Summary of the Utility Model
[0005] The embodiments of the present application provide a testing device and system for a methane gas sensor module to ensure a low labor cost while improving the testing efficiency.
[0006] In a first aspect, the embodiments of the present application provide a testing device for a methane gas sensor module, including: a sensor module placement board and a channel switching control board;
[0007] The sensor module placement board is provided with a preset number of placement slots, and the channel switching control board is provided with a preset number of transmission channels;
[0008] The placement slots are connected to the transmission channels in a one-to-one correspondence, and the channel switching control board is connected to the upper computer, and is used to realize that the methane gas sensor module placed in the placement slot communicates with the upper computer through the transmission channel.
[0009] In a second aspect, the embodiments of the present application provide a testing system for a methane gas sensor module, and the system includes an upper computer and a testing device for a methane gas sensor module provided in any embodiment of the present application;
[0010] The testing device for a methane gas sensor module is communicatively connected to the upper computer.
[0011] In the technical solution of the embodiment of the present application, the methane gas sensor module testing device includes: a sensor module placement board and a channel switching control board; the sensor module placement board is provided with a preset number of placement slots, and the channel switching control board is provided with a preset number of transmission channels; the placement slots are connected to the transmission channels one by one, and the channel switching control board is connected to the upper computer, so as to enable the methane gas sensor module placed in the placement slot to communicate with the upper computer through the transmission channel. Based on this, by using the sensor module placement board and the channel switching control board, the upper computer can be used to test a preset number of methane gas sensor modules at the same time, improving the testing efficiency without increasing the labor cost. Description of the Drawings
[0012] Figure 1 It is a schematic structural diagram of the methane gas sensor module testing device provided in Embodiment 1 of the present application;
[0013] Figure 2 It is a schematic structural diagram of a channel switching control board provided in Embodiment 1 of the present application;
[0014] Figure 3 It is a schematic circuit diagram of the relay drive circuit provided in Embodiment 1 of the present application;
[0015] Figure 4 It is a schematic structural diagram of a methane gas sensor module testing system provided in Embodiment 2 of the present application;
[0016] Figure 5 It is a schematic flow diagram of a methane gas sensor module testing method provided in Embodiment 3 of the present application. Detailed Embodiments
[0017] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that, for the sake of convenience of description, only a part related to the present application rather than all the structures are shown in the drawings.
[0018] Embodiment 1
[0019] Figure 1 It is a schematic structural diagram of the methane gas sensor module testing device provided in Embodiment 1 of the present application. As Figure 1 shown, the methane gas sensor module testing device of this embodiment may include: a sensor module placement board and a channel switching control board;
[0020] The sensor module placement board is provided with a preset number of placement slots, and the channel switching control board is provided with a preset number of transmission channels;
[0021] The placement slots are connected to the transmission channels one by one, and the channel switching control board is connected to the host computer, which is used to realize the communication between the methane gas sensor module placed in the placement slot and the host computer through the transmission channel.
[0022] In order to facilitate the access of the methane gas sensor module to the methane gas sensor module test equipment of this embodiment, in this embodiment, sensor input contacts and sensor output contacts can be set in the aforementioned placement slots.
[0023] Among them, when the methane gas sensor module is placed in the placement slot, the input end of the methane gas sensor module is in contact connection with the sensor input contact, and the output end of the methane gas sensor module is in contact connection with the sensor output contact.
[0024] Correspondingly, the input end and the output end of the methane gas sensor module can also be set in the form of contacts. The shape and size of the placement slot can be consistent with the shape and size of the methane gas sensor module, so that the methane gas sensor module can just be placed in the placement slot, and can play a certain buckling role, facilitating the input end and the output end of the methane gas sensor module to be in contact with the sensor input contact and the sensor output contact respectively to form a connection state.
[0025] Furthermore, the channel switching control board further includes a channel switching drive circuit and a sensing communication circuit;
[0026] The channel switching drive circuit is connected to the control ends of each transmission channel. One end of any transmission channel is connected to the sensor input contact and the sensor output contact of the corresponding placement slot;
[0027] The other ends of each transmission channel are all communicatively connected to one end of the sensing communication circuit, and the other end of the sensing communication circuit is communicatively connected to the host computer.
[0028] Among them, the channel switching drive circuit can include a host computer communication interface, a level conversion chip and a single-chip microcomputer. Among them, the host computer communication interface is used to connect to the host computer and receive the switching signal sent by the host computer. Then, the level conversion chip converts the switching signal into a level signal that can be received by the single-chip microcomputer. Based on this level signal, the sensor controls the on / off of the transmission channel through the connected control end.
[0029] In addition, the sensing communication circuit is mainly used to receive the data acquisition instruction from the host computer and the sensing data returned by the methane gas sensor module according to the data acquisition instruction.
[0030] In a specific example, the channel switching control board can refer to Figure 2 , Figure 2 which is a schematic structural diagram of a channel switching control board provided in Embodiment 1 of this application. As Figure 2As shown, the host computer communication interface can be an RS232 interface, the level conversion chip can be a MAX232 chip, the single-chip microcomputer can be an STM32L073V8T6 single-chip microcomputer, and the sensing communication circuit can be a TTL interface circuit.
[0031] Among them, the sensing communication circuit is divided into end A and end B, which are correspondingly connected to end A and end B of the transmission channel, that is, end A of the sensing communication circuit is connected to end A of the transmission channel, and end B of the sensing communication circuit is connected to end B of the transmission channel.
[0032] In addition, end C of the transmission channel is connected to the sensor input contact, and end D is connected to the sensor output contact. As Figure 2 shown, there are 20 transmission channels in total. Since each transmission channel is respectively connected to a placement slot, for the convenience of distinction, numbers are specifically assigned to end C and end D of the transmission channel, that is, the 1st transmission channel is end C1 and end D1, the 2nd transmission channel is end C2 and end D2, the 20th transmission channel is end C20 and end D20, and so on.
[0033] Figure 2 In, for the convenience of representation, the switch and the control end of the transmission channel are separately represented. Figure 2 For the transmission channel shown in, only the relay switch side is shown, that is, S1 and S2. Since each transmission channel includes an input channel and an output channel, a double-pole double-throw switch is used for opening and closing control. The relay control side is included in the relay drive circuit. For the convenience of understanding, the relay drive circuit will be described later.
[0034] Specifically, in this embodiment, any transmission channel includes a relay drive circuit, where the relay drive circuit includes a relay and an enable module;
[0035] The relay is provided with one end connected to the placement slot, the other end communicatively connected to the host computer, and an enable end; one end of the enable module is connected to the enable end, and the other end is the control end.
[0036] In a specific example, please refer to Figure 3 , Figure 3 which is the circuit structure schematic diagram of the relay drive circuit provided in Embodiment 1 of the present application. As Figure 3 shown, taking the relay drive circuit in the 1st transmission channel as an example, Relay1 represents the 1st relay; MCU_Relay1 is the GPIO pin of the single-chip microcomputer, used to enable the relay drive circuit; Sensor1_RX and Sensor1_TX are respectively used to connect the UART receive and transmit pins of the sensor module, that is, Figure 2 the C1 and D1 ends in; PC_TX and PC_RX respectively represent the TX and RX of the TTL communication interface, that is, Figure 2 the A and B ends in.
[0037] It should be noted that the above relay can be a double-pole double-throw relay. In addition, the enabling module is provided with a grounding on / off module; one end of the grounding on / off module is the control end, and the other end is connected to the enabling end; the grounding on / off module is provided with a grounding end, and the grounding end is grounded.
[0038] In a specific example, the grounding on / off module can be a triode circuit, such as Figure 3 As shown, Q1 with the model number SS8050 is a triode. When the single-chip microcomputer controls MCU_Relay1 to be at a high level, the 2nd and 3rd pins of the triode Q1 are conducted. At this time, the 12th pin of Relay1 is connected to GND, and +5V powers the relay Relay1, making the 4th pin conduct with the 5th pin, and the 8th pin conduct with the 9th pin, that is, Sensor1_RX conducts with PC_TX, and Sensor1_TX conducts with PC_RX, and the light-emitting diode LED2 lights up, playing a role in prompting the conduction of the Relay1 channel.
[0039] When the single-chip microcomputer controls MCU_Relay1 to be at a low level, the 2nd and 3rd pins of the triode Q1 are no longer conducted. At this time, the 12th pin of Relay1 is no longer connected to GND, and +5V no longer powers the relay Relay1. At this time, the 4th pin conducts with the 3rd pin, and the 9th pin conducts with the 10th pin, and the 3rd and 10th pins are empty pins, that is, the relay channel is closed, and the light-emitting diode LED2 goes out, playing a role in prompting the disconnection of the Relay1 channel.
[0040] It should be noted that a first voltage stabilizing power supply module is provided on the sensor module placement board, and a second voltage stabilizing power supply module is provided on the channel switching control board. The first voltage stabilizing power supply module can provide power for 20 methane gas sensor modules, and the voltage is 5V; the second voltage stabilizing power supply module provides a 12V working voltage for the channel switching control board. Among them, the model numbers of the core power supply components in the first voltage stabilizing power supply module and the second voltage stabilizing power supply module can both be IT6720.
[0041] It should be noted that the above quantities are all examples and can be adjusted according to requirements.
[0042] In this embodiment, the methane gas sensor module testing device includes a sensor module placement board and a channel switching control board. The sensor module placement board is provided with a preset number of placement slots, and the channel switching control board is provided with a preset number of transmission channels. The placement slots are connected to the transmission channels one by one, and the channel switching control board is connected to the host computer, so as to enable the methane gas sensor module placed in the placement slot to communicate with the host computer through the transmission channel. Based on this, by using the sensor module placement board and the channel switching control board, the host computer can be used to test a preset number of methane gas sensor modules simultaneously, improving the testing efficiency without increasing the labor cost.
[0043] Embodiment 2
[0044] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of a methane gas sensor module testing system provided in Embodiment 2 of the present application.
[0045] As Figure 4 shown, the methane gas sensor module testing system of this embodiment may include a host computer and a methane gas sensor module testing device provided in any embodiment of the present application; the methane gas sensor module testing device is communicatively connected to the host computer.
[0046] Among them, the host computer refers to a computer device installed with testing software. The user controls the switching of the transmission channels by performing relevant operations on the testing software in the host computer, thereby issuing a data acquisition instruction, and then the methane gas sensor module transmits back the sensing data according to the data acquisition instruction, so as to test the performance of the methane gas sensor module based on the sensing data.
[0047] It should be noted that the host computer can configure the temperature, methane gas concentration, etc. in the environment where the methane gas sensor module is located, so as to compare the error with the transmitted back sensing data, thereby determining the performance of the methane gas sensor module.
[0048] In a specific example, when the user tests a group of methane gas sensor modules, the user can first configure the testing environment and select the channel switching strategy. After clicking the start button of the testing software, the transmission channel switching, data acquisition instruction issuance, sensing data reception and testing analysis are automatically realized based on the channel switching strategy.
[0049] Embodiment 3
[0050] Please refer to Figure 5 , Figure 5Schematic flowchart of a method for testing a methane gas sensor module provided in Embodiment 3 of the present application. This method for testing a methane gas sensor module can be applied to the host computer and the methane gas sensor module in the aforementioned methane gas sensor module testing system, and is executed in cooperation by the two.
[0051] As Figure 5 shown, the method for testing a methane gas sensor module provided in this embodiment may include:
[0052] Step 501, the host computer controls the channel switching control board to switch to the target transmission channel in response to a pre-set channel switching strategy.
[0053] In this step, the channel switching strategy refers to the strategy for switching the transmission channel. In a specific example, the channel switching strategy may be to switch to the next channel every time the methane gas sensor module corresponding to the current transmission channel is tested, and then loop N times.
[0054] Of course, the channel switching strategy may also be to switch to the next channel every time the methane gas sensor module corresponding to the current transmission channel is tested N times.
[0055] For the sake of easy distinction, the switched transmission channel is called the target transmission channel.
[0056] Step 502, the host computer issues a data acquisition instruction to the methane gas sensor module in the corresponding placement slot through the target transmission channel.
[0057] In this step, the data acquisition instruction may include instruction information such as concentration calibration, concentration data acquisition, temperature data acquisition, humidity data acquisition, and module ID writing.
[0058] Step 503, the methane gas sensor module transmits the detected sensing data back to the host computer through the target transmission channel according to the data acquisition instruction.
[0059] In this step, the methane gas sensor module will use the collected concentration data, temperature data, humidity data, voltage data, transmission channel number, and product number of the methane gas sensor module as sensing data and transmit it back to the host computer through the target transmission channel.
[0060] Step 504, the host computer tests the performance of the methane gas sensor module according to the sensing data.
[0061] In this step, when performing performance analysis, it may be compared with the configuration parameters of the aforementioned configured test environment. The configuration parameters may include the concentration, humidity, temperature, etc. of the test environment. Through comparison, the accuracy of the sensing data can be tested, and this accuracy can be used as the test result of the performance test.
[0062] Note that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments only. Without departing from the concept of the present application, more other equivalent embodiments can be included, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. A methane gas sensor module testing device, characterized in that: include: Sensor module placement board and channel switching control board; The sensor module placement board is provided with a preset number of placement slots, and the channel switching control board is provided with the preset number of transmission channels; The placement slots are connected to the transmission channels in a one-to-one correspondence, and the channel switching control board is connected to a host computer, so as to enable the methane gas sensor module placed in the placement slots to communicate with the host computer through the transmission channel.
2. The device according to claim 1, characterized in that The placement slot is provided with a sensor input contact and a sensor output contact; When the methane gas sensor module is placed in the placement slot, the input end of the methane gas sensor module is in contact and connected with the sensor input contact, and the output end of the methane gas sensor module is in contact and connected with the sensor output contact.
3. The device according to claim 2, characterized in that The channel switching control board also includes a channel switching drive circuit and a sensor communication circuit; The channel switching driving circuit is connected to the control end of each transmission channel, and one end of any transmission channel is connected to the sensor input contact and the sensor output contact of the corresponding placement slot; The other end of each of the transmission channels is communicatively connected to one end of the sensor communication circuit, and the other end of the sensor communication circuit is communicatively connected to the host computer.
4. The device according to any one of claims 1 to 3, characterized in that: Any of the transmission channels includes a relay driving circuit.
5. The device according to claim 4, characterized in that The relay driving circuit includes a relay and an enabling module; The relay is provided with one end connected to the placement slot, the other end connected to the host computer for communication, and an enabling end; One end of the enabling module is connected to the enabling end, and the other end is the control end.
6. The device according to claim 5, characterized in that The relay is a double-pole double-throw relay.
7. The device according to claim 5, characterized in that The enabling module is provided with a grounding on-off module; One end of the grounding on-off module is the control end, and the other end is connected to the enabling end; The grounding on-off module is provided with a grounding terminal, and the grounding terminal is grounded.
8. The device according to claim 1, characterized in that The sensor module placement board is provided with a first voltage-stabilized power supply module, and the channel switching control board is provided with a second voltage-stabilized power supply module.
9. A methane gas sensor module testing system, characterized in that: The system comprises a host computer and a methane gas sensor module testing device according to any one of claims 1 to 8; The methane gas sensor module testing equipment is communicatively connected to the host computer.