Optical path deflection angle testing system for open-path gas detector

Abstract

The utility model provides a kind of optical path deflection angle test system of open circuit type gas detector.Laser transmitter is coaxially fixed on receiving end, and the center of laser transmitter, transmitting end and receiving end is collinear, which can ensure that the optical path of laser transmitter coincides with the optical path of transmitting end when the axial direction of receiving end is perpendicular to coordinate system panel, and the light spot of laser transmitter on coordinate system panel is taken as zero point position when coinciding, then receiving end can be deflected to drive laser transmitter to rotate synchronously, in this way, the light spot of laser transmitter on coordinate system panel also moves synchronously, so the distance that light spot needs to move can be calculated based on the distance between transmitting end and coordinate system panel and the tangent value of deflection angle, when the distance between light spot and zero point position meets the distance that light spot needs to move calculated, the deflection angle test of receiving end in this deflection direction is completed.

Description

Technical Field

[0001] This utility model relates to the field of gas detector technology, and in particular to an optical path deflection angle testing system for an open-circuit gas detector. Background Technology

[0002] Open-circuit gas detectors require a deflection angle test at the receiving end within the maximum optical path (typically 60m), measuring the maximum permissible deflection angle (typically 0.6°). The purpose is to verify whether the entire system can properly monitor flammable and hazardous gases when the equipment deflects. Current solutions primarily include the laser-based displacement method and the precision mechanical platform angle deflection method.

[0003] The laser reference displacement method is performed according to the following steps: a) Fix a laser pointer to the receiving end of the open-circuit gas detector, ensuring that the two are tightly connected and in firm contact; b) Place a coordinate system panel 60 meters away from the transmitter in the direction of the transmitter equipment; c) Turn on the laser pointer and use the marker to record the original coordinate position of the light spot on the coordinate system panel; d) The receiver is slightly moved in a specific direction (left) to deflect the optical path at a certain angle; e) Observe the movement of the light spot until the light spot moves 63cm to the left (60m*tan0.6=0.63m) from the initial position on the coordinate system panel; f) At this point, the maximum deflection angle is achieved; g) Perform functional tests on the open-circuit gas detector; h) Repeat the above steps to test the deflection angles of the detector receiver in the right, up, and down directions in sequence; shortcoming: Operating the equipment at a distance of 60m is quite complex; The laser pointer has high performance requirements: the laser beam diverges after long-distance transmission, which affects the measurement accuracy and makes it difficult to judge the moving distance; ordinary laser pointers cannot meet the requirements. At least 2-3 engineers are required to work together at a distance of 60m between the transmitter and receiver. The receiver is offset while the offset distance is observed at the transmitter. During the above actions, the working status of the gas detector is tested accordingly.

[0004] The angle deflection method for precision mechanical platforms is performed according to the following steps: a) Place the receiver on the mechanical platform; b) The fine-tuning mechanical platform rotates counterclockwise; c) Continue until the receiving device rotates 0.6° to the left; d) Conduct functional tests on the open-circuit gas detector; e) Repeat the above steps to test the deflection angles of the detector receiver in the right, up, and down directions in sequence; shortcoming: The platform design is complex: it needs to be able to rotate in three directions: x, y, and z. The entire testing system requires an air-bearing turntable, flexible hinges, and linear motors: high-precision servo motors must be selected. The base needs to be flat and stable, and has high requirements for weight and size; The overall cost is high, and the system design is complex, requiring system-level joint debugging and repeated verification. Utility Model Content

[0005] This invention provides a test system for the optical path deflection angle of an open-circuit gas detector, which can be simplified to the deflection angle test of an open-circuit gas detector, thus saving test costs.

[0006] To solve the above-mentioned technical problems, this utility model provides an optical path deflection angle testing system for an open-circuit gas detector. The open-circuit gas detector includes a transmitter and a receiver. The optical path deflection angle testing system includes a coordinate system panel and a laser transmitter. The coordinate system panel, the receiver, and the transmitter are arranged sequentially at intervals. The laser transmitter is coaxially fixed on the receiver and can rotate synchronously with the receiver. The centers of the laser transmitter, the transmitter, and the receiver are collinear. The optical path directions of the laser transmitter and the transmitter both point to the coordinate system panel.

[0007] Optionally, the coordinate system panel has an xy plane rectangular coordinate system, and the rotation of the receiving end includes rotation toward the positive and negative x-axis and rotation toward the positive and negative y-axis.

[0008] Optionally, the optical path direction of the transmitting end is perpendicular to the coordinate system panel. When the optical paths of the laser emitter and the transmitting end coincide, the light spot of the laser emitter on the coordinate system panel is located at the origin of the Cartesian coordinate system of the coordinate system panel.

[0009] Optionally, the optical path deflection angle testing system further includes a vernier caliper, which is used to measure the distance between the light spot of the laser emitter on the coordinate system panel and the origin of the plane rectangular coordinate system.

[0010] Optionally, the distance between the coordinate system panel and the receiving end is greater than or equal to 80cm and less than or equal to 120cm.

[0011] Optionally, the distance between the transmitter and the receiver is less than or equal to 60m.

[0012] Optionally, the vertical rotation angle of the receiving end relative to the coordinate system panel does not exceed 0.6°.

[0013] Optionally, the laser emitter is clamped and fixed to the receiver by a clamp.

[0014] Optionally, an alarm unit may be provided on the receiving end.

[0015] Optionally, the laser emitter may include a laser pointer.

[0016] The optical path deflection angle testing system for the open-circuit gas detector described above uses a laser emitter coaxially fixed to the receiver. The centers of the laser emitter, the receiver, and the receiver are collinear, ensuring that the optical path of the laser emitter coincides with that of the transmitter when the receiver's axis is perpendicular to the coordinate system panel. At this point of coincidence, the laser emitter's spot on the coordinate system panel is taken as the zero point. The receiver can then be deflected, causing the laser emitter to rotate synchronously. Consequently, the laser emitter's spot on the coordinate system panel also moves synchronously. The distance the spot needs to move can be calculated based on the distance between the transmitter and the coordinate system panel and the tangent of the deflection angle. When the distance between the spot and the zero point meets the calculated distance, the deflection angle test of the receiver in this deflection direction is complete. This invention features a simple structure, easy-to-use and low-cost tools, reducing labor costs for testing. Attached Figure Description

[0017] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein: Figure 1 This is a schematic diagram of an optical path deflection angle testing system according to an embodiment of the present invention.

[0018] In the attached image:

[0019] 10 - Transmitter; 20 - Receiver; 30 - Laser emitter; 40 - Coordinate system panel; 50 - Vernier caliper. Detailed Implementation

[0020] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.

[0021] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to include the meaning of “and / or”; the term “a number” is generally used to include the meaning of “at least one”; and the term “at least two” is generally used to include the meaning of “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. “One end” and “the other end,” as well as “proximal end” and “far end,” generally refer to two corresponding parts, including not only endpoints. The terms “installed,” “connected,” and “joined” should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two elements or the interaction between two elements. Furthermore, as used in this invention, the phrase "one element is disposed on another element" generally only indicates that there is a connection, coupling, cooperation, or transmission relationship between the two elements. This connection, coupling, cooperation, or transmission can be direct or indirect through an intermediate element, and should not be construed as indicating or implying a spatial positional relationship between the two elements. That is, one element can be located arbitrarily inside, outside, above, below, or to one side of the other element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] An open-circuit gas detector consists of a transmitter that emits an infrared beam and a receiver that receives the absorbed infrared beam. They must be installed in pairs and typically consist of optical and electronic components. The transmitter continuously emits infrared light of a specific wavelength. When this infrared light passes through a space containing the gas to be detected, gas molecules absorb a portion of the infrared light. The receiver calculates the gas concentration by analyzing the intensity changes of the remaining infrared light. The transmitter and receiver must maintain a fixed distance (e.g., 60 meters) to ensure the beam path covers the detection area. If the gas concentration exceeds the limit, the receiver triggers an alarm signal. An alarm unit is typically installed at the receiver to generate an alarm signal, which may include, but is not limited to, audible and visual signals.

[0023] This embodiment provides a light path deflection angle testing system for an open-circuit gas detector. The system includes a coordinate system panel 40 and a laser emitter 30. The coordinate system panel 40, receiver 20, and transmitter 10 are arranged sequentially at intervals. The laser emitter 30 is coaxially fixed to the receiver 20. The receiver 20 can deflect around its center, and the laser emitter 30 can rotate synchronously with the receiver 20. The centers of the laser emitter 30, transmitter 10, and receiver 20 are collinear. The light path directions of the laser emitter 30 and transmitter 10 both point towards the coordinate system panel 40, while the light path direction of transmitter 10 is perpendicular to the coordinate system panel 40. The laser emitter 30 can be, for example, a laser pointer. The laser emitter 30 can be clamped and fixed to the receiver 20 using a fixture.

[0024] In the above-described open-circuit gas detector optical path deflection angle testing system, the laser emitter 30 is coaxially fixed on the receiver 20. The centers of the laser emitter 30, the transmitter 10, and the receiver 20 are collinear, ensuring that when the axis of the receiver 20 is perpendicular to the coordinate system panel 40, the optical path of the laser emitter 30 coincides with the optical path of the transmitter 10. When they coincide, the light spot of the laser emitter 30 on the coordinate system panel 40 is taken as the zero point. The receiver 20 can then be deflected, causing the laser emitter 30 to rotate synchronously. Thus, the light spot of the laser emitter 30 on the coordinate system panel 40 also moves synchronously. The distance the light spot needs to move can be calculated based on the distance between the transmitter 10 and the coordinate system panel 40 and the tangent of the deflection angle. When the distance between the light spot and the zero point meets the calculated distance, the deflection angle test of the receiver 20 in this deflection direction is completed. The same steps are then used to test the deflection angle in other deflection directions. This invention has a simple structure, and the tools used in the operation are easy to operate and low in cost, reducing the cost of manual testing.

[0025] For example, the distance between the coordinate system panel 40 and the receiver 20 is greater than or equal to 80 cm and less than or equal to 120 cm, such as a distance of 1 m. The distance between the transmitter 10 and the receiver 20 is less than or equal to 60 m, such as a distance of 60 m. Optionally, the vertical rotation angle of the receiver 20 relative to the coordinate system panel 40 does not exceed 0.6°, that is, the maximum deflection angle of the receiver 20 is 0.6°.

[0026] by Figure 1 For example, the distance between receiver 20 and coordinate system panel 40 is m, the deflection angle of receiver 20 is α, and the distance of the light spot relative to the zero point is n. When n = m × tanα, the deflection angle test of the deflection direction is completed. For example, if α is 0.6° and m is 1m, the measurement is completed when the distance the light spot moves is 1m × tan0.6° = 0.0105m.

[0027] In one embodiment, the coordinate system panel 40 has an xy-plane rectangular coordinate system, and the rotation of the receiving end 20 includes rotation toward the x-axis and the y-axis. The deflection angle tests toward the x-axis and the y-axis are performed sequentially.

[0028] In one embodiment, when the optical paths of the laser emitter 30 and the emitting end 10 coincide, the light spot of the laser emitter 30 on the coordinate system panel 40 is located at the origin of the Cartesian coordinate system of the coordinate system panel 40.

[0029] Preferably, the optical path deflection angle testing system also includes a vernier caliper 50, which is used to measure the distance from the light spot of the laser emitter 30 on the coordinate system panel 40 to the origin of the Cartesian coordinate system. Using the vernier caliper 50 can improve the measurement accuracy.

[0030] In summary, the optical path deflection angle testing system includes a coordinate system panel 40 and a laser emitter 30. The coordinate system panel 40, the receiver 20, and the transmitter 10 are arranged sequentially at intervals. The laser emitter 30 is coaxially fixed on the receiver 20 and can rotate synchronously with the receiver 20. The centers of the laser emitter 30, the transmitter 10, and the receiver 20 are collinear, and the optical path directions of the laser emitter 30 and the transmitter 10 both point towards the coordinate system panel 40. Thus, the laser emitter 30 is coaxially fixed on the receiver 20, and the centers of the laser emitter 30, the transmitter 10, and the receiver 20 are collinear. This ensures that when the axis of the receiver 20 is perpendicular to the coordinate system panel 40, the optical path of the laser emitter 30 coincides with the optical path of the transmitter 10. When they coincide, the light spot of the laser emitter 30 on the coordinate system panel 40 is taken as the zero point. The receiver 20 can then be deflected, causing the laser emitter 30 to rotate synchronously. Consequently, the light spot of the laser emitter 30 on the coordinate system panel 40 also moves synchronously. The distance the light spot needs to move can be calculated based on the distance between the transmitter 10 and the coordinate system panel 40 and the tangent of the deflection angle. When the distance between the light spot and the zero point meets the calculated distance the light spot needs to move, the deflection angle test of the receiver 20 in this deflection direction is completed. This invention has a simple structure, uses easy-to-operate and low-cost tools, and reduces labor testing costs.

[0031] Although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A test system for the optical path deflection angle of an open-circuit gas detector, wherein the open-circuit gas detector comprises a transmitter and a receiver, characterized in that, The optical path deflection angle testing system includes a coordinate system panel and a laser emitter. The coordinate system panel, the receiver, and the emitter are arranged sequentially at intervals. The laser emitter is coaxially fixed on the receiver and can rotate synchronously with the receiver. The centers of the laser emitter, the emitter, and the receiver are collinear, and the optical path directions of the laser emitter and the emitter both point to the coordinate system panel.

2. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The coordinate system panel has an xy plane rectangular coordinate system, and the rotation of the receiving end includes rotation toward the positive and negative x-axis and rotation toward the positive and negative y-axis.

3. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The optical path direction of the transmitting end is perpendicular to the coordinate system panel. When the optical paths of the laser emitter and the transmitting end coincide, the light spot of the laser emitter on the coordinate system panel is located at the origin of the Cartesian coordinate system of the coordinate system panel.

4. The optical path deflection angle testing system for an open-circuit gas detector according to claim 3, characterized in that, The optical path deflection angle testing system also includes a vernier caliper, which is used to measure the distance between the light spot of the laser emitter on the coordinate system panel and the origin of the plane rectangular coordinate system.

5. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The distance between the coordinate system panel and the receiving end is greater than or equal to 80cm and less than or equal to 120cm.

6. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The distance between the transmitter and the receiver is less than or equal to 60m.

7. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The vertical rotation angle of the receiving end relative to the coordinate system panel does not exceed 0.6°.

8. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The laser emitter is held and fixed to the receiver by a clamp.

9. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, An alarm unit is installed on the receiving end.

10. The optical path deflection angle testing system for an open-circuit gas detector according to claim 1, characterized in that, The laser emitter includes a laser pointer.

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