Laser methane sensor batch testing device

Abstract

The utility model discloses a batch testing device for laser methane sensors. The batch testing device comprises a closed container cavity, the closed container cavity is provided with an air inlet pipeline, a methane gas inlet pipeline, an exhaust pipeline and a pressure monitoring instrument; observation doors and windows are arranged on the front side and the rear side of the closed container cavity; a plurality of aviation plugs are arranged at the top of the cavity of the closed container; a plurality of batch measurement large plates are arranged in the cavity of the closed container; an internal circulation air conditioner is further mounted at the top end in the cavity of the closed container; a plurality of circulating fans are arranged on the inner wall of the cavity of the closed container in an up-down staggered manner; the closed container cavity is provided with a one-key power-on and power-off distribution box; the special gas pipeline and the automatic control electromagnetic valve are adopted to control gas inlet and gas outlet, so that the production safety and the gas distribution efficiency are improved; the constant temperature of the test environment is maintained by adopting the air conditioner, the interference of temperature change on the calibration accuracy is avoided, automatic gas distribution, automatic test, automatic data storage and transmission are supported, and a one-key test function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field related to methane sensor testing, and in particular to a laser methane sensor batch testing device. Background Art

[0002] Laser methane sensors detect gas concentrations by utilizing the wavelength tuning characteristics of semiconductor lasers and the selective absorption of specific wavelength lasers by the gas to be tested. Due to slight differences between individual semiconductor lasers and the precision influence of some assembly processes of the sensor itself, laser methane sensors need to be calibrated and tested at a specific methane gas concentration before leaving the factory to ensure measurement accuracy and precision. To save costs, a standard gas of a specific concentration is usually not used in the test phase. Instead, a gas of the corresponding concentration is prepared by injecting a mixture of pure methane and air into a sealed container with a syringe, commonly known as "gas mixing." The more common test method currently is to place the laser methane sensor to be tested in a sealed container and then perform the "gas mixing" action. After the "gas mixing" is completed, the corresponding instructions are input into the laser methane sensor to complete the calibration and testing actions.

[0003] However, the traditional testing process has the following shortcomings: considering the difficulty of controlling gas uniformity and the accuracy of controlling gas distribution, the design volume of the sealed container is usually small, and the number of sensors measured at a single time is small. The current common number of tests is around 20-30; the test time is long, and the heating of the sensor being tested causes the temperature inside the container to rise, affecting the accuracy of the test results; using a syringe to inject pure methane gas poses a safety hazard; the traditional gas distribution method is inefficient and has a long operation cycle; there are many communication lines and power lines during the test, which are prone to failure.

[0004] Based on the above existing problems, our company proposed corresponding equipment technology transformation after sufficient comparison and demonstration, and developed and designed a laser methane sensor batch testing device. Utility Model Content

[0005] The purpose of the utility model is to provide a laser methane sensor batch testing device to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present utility model is: a laser methane sensor batch testing device, comprising a sealed container cavity;

[0007] The sealed container cavity is provided with an air inlet pipeline, a methane gas inlet pipeline, an exhaust pipeline and a pressure monitoring instrument;

[0008] The sealed container cavity is provided with observation doors and windows on the front and back sides;

[0009] A plurality of aviation plugs are provided on the top of the sealed container cavity;

[0010] A plurality of batch test plates are provided in the cavity of the sealed container;

[0011] An internal circulation cooling and heating air conditioner is also installed on the top of the closed container cavity;

[0012] A plurality of circulation fans are arranged alternately on the inner wall of the sealed container cavity;

[0013] The sealed container cavity is provided with a power distribution box with one-button power on and off.

[0014] In a preferred embodiment, the interfaces of the air inlet pipeline and the methane gas inlet pipeline are both DN25 external thread interfaces; and the interface of the exhaust pipeline is a DN50 external thread interface.

[0015] In a preferred solution, the air inlet pipeline, the methane gas inlet pipeline and the exhaust pipeline are all equipped with solenoid valves or electric ball valves.

[0016] In a preferred embodiment, the observation doors and windows are aluminum alloy and tempered glass doors and windows with sealing rings.

[0017] In a preferred solution, the aviation plug is 21X4 and is distributed on the top of the sealed container cavity.

[0018] In a preferred embodiment, the internal circulation heating and cooling air conditioner includes an air conditioner main body, an air duct and a pipe connected to the air conditioner outdoor unit; one end of the air duct is connected to the air conditioner main body, and the air outlet at the other end is set downward; one end of the pipe connected to the air conditioner outdoor unit is connected to the air conditioner main body, and the other end extends out of the closed container cavity.

[0019] In a preferred solution, there are two distribution boxes.

[0020] In a preferred embodiment, the air inlet pipe end is connected to 8 kg of compressed air; the exhaust pipe end is connected to a 40W exhaust pump.

[0021] Due to the application of the above technical solution, the beneficial effects of this application compared with the prior art are:

[0022] A laser methane sensor batch testing device disclosed in the present application, by combining a test program, can complete the calibration and testing of 560 pcs of laser methane sensor modules at one time without extending the test time, greatly improving the efficiency compared to traditional calibration and testing schemes; using professional gas pipelines and automatic solenoid valves to control air intake and exhaust, greatly improving production safety and "gas distribution" efficiency; using air conditioning to maintain a constant temperature in the test environment, eliminating the interference of temperature changes on calibration accuracy; after the device control program is upgraded, it can support automatic gas distribution, automatic testing, automatic data storage and transmission, and realize one-click testing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Attachment Figure 1 This is a schematic structural diagram of a batch testing device for laser methane sensors of the present invention;

[0025] Attachment Figure 2 This is a schematic diagram of the interior of the laser methane sensor batch testing device of the present utility model;

[0026] Attachment Figure 3 This is a top schematic diagram of the laser methane sensor batch testing device of the present utility model;

[0027] Among them: 1. Sealed container cavity; 2. Air inlet pipe; 3. Methane gas inlet pipe; 4. Exhaust pipe; 5. Observation doors and windows; 6. Aviation plug; 7. Batch test panel; 8. Internal circulation heating and cooling air conditioner; 9. Circulation fan; 10. Air conditioner body; 11. Air duct; 12. Pipe to the air conditioner outdoor unit. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0031] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0032] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Example 1

[0035] Attachment Figure 1-3 The laser methane sensor batch testing device described in the present invention includes a sealed container cavity 1; for example, the outer dimensions of the device are 1574mm*1350mm*1763mm, the bottom bracket is 325mm high, and the internal sealed space volume is 2.86m 3 ;

[0036] The sealed container cavity 1 is provided with an air inlet pipe 2, a methane gas inlet pipe 3, an exhaust pipe 4 and a pressure monitoring instrument; the interfaces of the air inlet pipe 2 and the methane gas inlet pipe 3 are both DN25 external thread interfaces; the interface of the exhaust pipe 4 is a DN50 external thread interface; the air inlet pipe 2, the methane gas inlet pipe 3 and the exhaust pipe 4 are all equipped with solenoid valves or electric ball valves, which can be automatically and manually controlled through the control panel;

[0037] The sealed container cavity 1 is provided with observation doors and windows 5 on the front and back sides; the front and back sides are equipped with 4 aluminum alloy and tempered glass doors and windows with sealing rings;

[0038] The top of the sealed container cavity 1 is provided with a plurality of aviation plugs 6; the aviation plugs 6 are 21X4, totaling 84, distributed on the top of the sealed container cavity 1, and are used to provide power supply and communication connection to the module to be tested;

[0039] The sealed container cavity 1 is provided with a plurality of batch test boards 7; each batch test board 7 can be installed with 28 laser methane sensor modules at the same time, and the switch devices in the batch test board 7 are used to realize the calibration and test of each sensor module one by one. The entire sealed container cavity 1 can be pushed into 20 batch test boards 7 at a time by a customized test trolley, and 560 laser methane sensor modules can be measured each time;

[0040] An internal circulation heating and cooling air conditioner 8 is also installed on the top of the sealed container cavity 1. The internal circulation heating and cooling air conditioner 8 includes an air conditioner body 10, an air duct 11, and a pipe 12 for connecting to the air conditioner's external unit. One end of the air duct 11 is connected to the air conditioner body 10, and the air outlet at the other end is downwardly disposed. One end of the pipe 12 for connecting to the air conditioner's external unit is connected to the air conditioner main unit, and the other end extends out of the sealed container cavity 1. The sealed container cavity 1 is capable of maintaining a constant temperature, typically set at 26 degrees Celsius and an air pressure of 1 atmosphere.

[0041] Twelve circulation fans 9 are arranged alternately on the upper and lower inner walls of the sealed container cavity 1 , which are turned on to provide sufficient gas circulation power to ensure the uniformity of the gas inside the sealed container cavity 1 .

[0042] The sealed container cavity 1 is provided with two one-button power distribution boxes, which can provide 20-way 5V 8A test power supply, and can realize one-button power on and off, and can realize automatic power on and off in conjunction with the test program.

[0043] In order to achieve rapid exhaust and greatly improve the "gas distribution" speed, the second end of the air inlet pipe is connected to 8 kg of compressed air; the fourth end of the exhaust pipe is connected to a 40W exhaust pump.

[0044] A laser methane sensor batch testing device in the present application, by combining a test program, can complete the calibration and testing of 560 pcs of laser methane sensor modules at one time without extending the test time. Compared with traditional calibration and testing solutions, the efficiency is greatly improved by 20 times, and the space can even be expanded, with the maximum test quantity being expanded to 784 pcs. Professional gas pipelines are used to automatically control the solenoid valves to control the air intake and exhaust, greatly improving production safety and "gas distribution" efficiency. Air conditioning is used to maintain a constant temperature in the test environment, eliminating the interference of temperature changes on calibration accuracy. After the device control program is upgraded, it can support automatic gas distribution, automatic testing, automatic data storage and transmission, and realize one-click testing function.

[0045] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser methane sensor batch testing device, characterized by: including a closed container cavity; The sealed container cavity is provided with an air inlet pipeline, a methane gas inlet pipeline, an exhaust pipeline and a pressure monitoring instrument; The sealed container cavity is provided with observation doors and windows on the front and back sides; A plurality of aviation plugs are provided on the top of the sealed container cavity; A plurality of batch test plates are provided in the cavity of the sealed container; An internal circulation cooling and heating air conditioner is also installed on the top of the closed container cavity; A plurality of circulation fans are arranged alternately on the inner wall of the sealed container cavity; The sealed container cavity is provided with a power distribution box with one-button power on and off.

2. A laser methane sensor batch testing device according to claim 1, characterized in that: The interfaces of the air inlet pipeline and the methane gas inlet pipeline are both DN25 external thread interfaces; the interface of the exhaust pipeline is a DN50 external thread interface.

3. The laser methane sensor batch testing device according to claim 1, characterized in that: The air inlet pipeline, the methane gas inlet pipeline and the exhaust pipeline are all equipped with solenoid valves or electric ball valves.

4. The laser methane sensor batch testing device according to claim 1, characterized in that: The observation doors and windows are aluminum alloy and tempered glass doors and windows with sealing rings.

5. The laser methane sensor batch testing device according to claim 1, characterized in that: The aviation plug is 21X4 and is distributed on the top of the sealed container cavity.

6. The laser methane sensor batch testing device according to claim 1, characterized in that: The internal circulation heating and cooling air conditioner includes an air conditioner main body, an air duct and a pipe connected to the air conditioner outdoor unit; one end of the air duct is connected to the air conditioner main body, and the air outlet at the other end is set downward; one end of the pipe connected to the air conditioner outdoor unit is connected to the air conditioner main unit, and the other end extends out of the closed container cavity.

7. The laser methane sensor batch testing device according to claim 1, characterized in that: There are two distribution boxes in total.

8. The laser methane sensor batch testing device according to claim 1, characterized in that: The air inlet pipe end is connected to 8 kg of compressed air; the exhaust pipe end is connected to a 40W exhaust pump.

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