Method and device for adjusting air duct air supply state detection sensor

Abstract

The invention relates to the field of air duct air supply system detection, in particular to a method and device for adjusting an air duct air supply state detection sensor. The device comprises a first swing arm, a second swing arm, an angle ruler and a translation guide rail, one end of the first swing arm is rotationally connected with one end of the translation guide rail, and the other end of the first swing arm is rotationally connected with one end of the second swing arm; the other end of the second swinging arm is in sliding connection with the translation guide rail; a main gauge outfit limiting baffle is arranged on the first swing arm, an auxiliary gauge outfit limiting baffle is arranged on the second swing arm, and the included angle formed by the main gauge outfit and the auxiliary gauge outfit is equal to the included angle formed by the first swing arm and the second swing arm; the bevel protractor is fixedly installed on an assembly formed by the first swing arm and the second swing arm so as to detect the included angle formed by the main gauge outfit and the auxiliary gauge outfit. Zero point, linearity and precision calibration can be carried out on the air duct air supply state detection sensor based on the posture recognition technology, and then the working reliability and measurement accuracy of the air duct air supply state detection sensor are guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of wind duct air supply system detection, and relates to a method and a device for adjusting a wind duct air supply state detection sensor based on a posture recognition technology. Background Art

[0002] Mine ventilation is an important guarantee for safe production in coal mines, and the air supply status detection sensor for the wind duct is an important device for detecting the ventilation status of soft wind ducts in mines. It can effectively reduce safety accidents caused by the failure to discharge toxic and harmful gases in time due to small air volume in the wind duct, air leakage in the wind duct, or failure of the fan. Therefore, monitoring the opening and closing of the wind duct is an important means to ensure safe production in mines. The mine wind duct air supply status detection sensor based on the posture recognition technology of the inclination detection principle is a new type of mine sensor for detecting the air supply status of the wind duct. Compared with the traditional bundled mechanical switch or steel frame touch proximity switch type wind duct air supply status detection sensor, it has the advantages of high detection accuracy, convenient production debugging, installation and maintenance, strong anti-electromagnetic interference ability, etc., and has been more and more widely used.

[0003] The mine wind duct air supply state detection sensor based on the posture recognition technology of the inclination detection principle realizes the monitoring of the wind duct air supply state according to the different angles between the main and auxiliary heads of the sensor that are close to the surface of the wind duct in different states. Figure 1 As shown, the wind tube air supply state monitoring sensor based on posture recognition technology is vertically suspended by a hanging ring, so that the sensor just straddles the wind tube. The main and auxiliary heads of the sensor (both containing a three-axis acceleration sensor chip) are symmetrically placed on the outer surfaces of both sides of the wind tube, and one end of the main and auxiliary heads are connected through a head communication line, and the other end is tied to the wind tube by a binding belt. The hanging ring is arranged on the head communication line. The angle between the main and auxiliary heads of the sensor is α. The angle α can be calculated by detecting the inclination change of the three-axis acceleration sensor chip (main and auxiliary heads) on the cross section of the wind tube. When the ventilation state of the wind tube changes, the inclination angles of the main and auxiliary heads of the sensor also change, and the angle α between them also changes. Its value is smaller when there is no wind and larger when there is wind. That is, when the air volume inside the wind tube changes, the wind tube becomes shrunken or bulging, and the posture of the three-axis acceleration sensor chip in the main and auxiliary heads also changes. Based on the key information and judgment threshold of the posture, it can be determined whether there is sufficient air flow inside the wind tube. The detection of the posture is the detection of the angle. The mine wind tube air supply state detection sensor based on posture recognition technology can continuously monitor the switch state of the local fan wind tube of the underground excavation working face or coal mining working face of the coal mine for a long time.

[0004] The production process, factory qualified inspection, and on-site use of the air supply state detection sensor for the air duct based on the posture recognition technology need to be calibrated for the zero point, linearity, and accuracy of the detection angle, thereby ensuring the working reliability and measurement accuracy of the air supply state detection sensor for the air duct, but there is currently a lack of relevant calibration methods and devices. Therefore, it is currently urgent to propose a method and device for calibrating the zero point, linearity, and accuracy of the air supply state detection sensor for the air duct based on the posture recognition technology. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method and device for calibrating a hair dryer air supply status detection sensor based on posture recognition technology, so as to calibrate the zero point, linearity and accuracy of the hair dryer air supply status detection sensor based on posture recognition technology, thereby ensuring the working reliability and measurement accuracy of the hair dryer air supply status detection sensor.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A calibration device for a fan air supply state detection sensor, the calibration device is used to calibrate the fan air supply state detection sensor based on posture recognition technology, comprising a first swing arm, a second swing arm, an angle ruler and a translation guide rail, one end of the first swing arm is rotatably connected to one end of the translation guide rail, the other end of the first swing arm is rotatably connected to one end of the second swing arm, and the other end of the second swing arm is slidably connected to the translation guide rail;

[0008] A main meter head limit baffle plate for fixing and installing a main meter head in the air supply state detection sensor of the air duct is provided on the first swing arm, and a sub-meter head limit baffle plate for fixing and installing a sub-meter head in the air supply state detection sensor of the air duct is provided on the second swing arm, and the angle formed by the main meter head and the sub-meter head after being fixedly installed in the main meter head limit baffle plate and the sub-meter head limit baffle plate is equal to the angle formed by the first swing arm and the second swing arm;

[0009] The angle ruler is fixedly mounted on the assembly formed by the first swing arm and the second swing arm, and is used to detect the angle formed by the first swing arm and the second swing arm, and further detect the angle formed by the main meter head and the auxiliary meter head.

[0010] Furthermore, the first swing arm and the second swing arm are rotationally connected via a follower shaft.

[0011] Furthermore, the angle ruler includes a first measuring arm, a second measuring arm, an angle ruler rotating shaft and a display unit, the first measuring arm is connected and fixed to the first swing arm, the second measuring arm is connected and fixed to the second swing arm, the first measuring arm and the second measuring arm are rotatably connected through the angle ruler rotating shaft, and the angle ruler rotating shaft is coaxial with the follower rotating shaft, the first swing arm and the first measuring arm are arranged in parallel, and the second swing arm and the second measuring arm are arranged in parallel, so that the angle formed by the first swing arm and the second swing arm is equal to the angle of the angle ruler, and then the angle formed by the first swing arm and the second swing arm is detected by the angle ruler.

[0012] Furthermore, the angle ruler is fixedly mounted on one side of an assembly formed by the first swing arm, the second swing arm and the follower shaft, and the display unit faces outwards for easy observation.

[0013] Further, the main meter head limit baffle is arranged on a side of the first swing arm away from the translation guide rail, and the auxiliary meter head limit baffle is arranged on a side of the second swing arm away from the translation guide rail.

[0014] Furthermore, the first swing arm is rotatably connected to a rotation shaft fixing seat fixedly mounted on one end of the translation guide rail through a fixed rotation shaft, so as to be rotatably connected to one end of the translation guide rail.

[0015] Furthermore, a roller placed on the translation guide rail is rotatably connected to one end of the second swing arm away from the first swing arm so as to be slidably connected to the translation guide rail.

[0016] Furthermore, a guide rail limiting block is provided on one end of the translation guide rail away from the rotating shaft fixing seat to limit the roller.

[0017] A method for adjusting a sensor for detecting the air supply status of a fan duct is provided, and a device for adjusting the sensor for detecting the air supply status of a fan duct is provided, comprising the following steps:

[0018] S1. The duct air supply state detection sensor adjustment device in the translation guide rail is placed horizontally;

[0019] S2. The main meter head is fixedly installed in the main meter head limit baffle, and the axis direction of the main meter head is parallel to the first swing arm;

[0020] S3. The auxiliary meter head is fixedly installed in the auxiliary meter head limit baffle, and the axis direction of the auxiliary meter head is parallel to the second swing arm. Through steps S2 and S3, the plane formed by the main meter head and the auxiliary meter head coincides with the plane formed by the first swing arm and the second swing arm, and the angle formed by the axis direction of the main meter head and the axis of the auxiliary meter head is equal to the angle formed by the first swing arm and the second swing arm and the angle of the angle ruler;

[0021] S4. When the first swing arm and the second swing arm are adjusted to be close together, the angle formed is 0°, and the angle displayed on the angle ruler is 0°. At this time, the angle formed by the main header and the auxiliary header is calibrated as the initial zero point;

[0022] S5. Move the second swing arm away from one end of the first swing arm along the translation guide rail, so that the angle formed by the first swing arm and the second swing arm gradually increases, the angle displayed by the angle ruler increases synchronously, and the angle formed by the main meter head and the auxiliary meter head gradually increases, until the end of the second swing arm away from the first swing arm reaches the end of the translation guide rail;

[0023] S6. Evenly select several angle values ​​displayed by the angle scale between the initial zero point position and the end of the translation guide rail, and use this angle value to calibrate the linearity and accuracy of the angle formed by the main head and the auxiliary head to complete the zero point, linearity and accuracy calibration of the air duct air supply status detection sensor based on posture recognition technology.

[0024] Furthermore, a guide rail limit block is provided at the end of the translation guide rail to limit the movement of the second swing arm away from one end of the first swing arm.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a calibration device for a fan duct air supply status detection sensor based on posture recognition technology. By constructing a movable mechanism with synchronously changing angles, the angle formed by a first swing arm, a second swing arm and a follower shaft and the angle formed by a first measuring arm, a second measuring arm and the rotating shaft of a high-precision angle ruler are made the same and change synchronously. Then, the main head and the auxiliary head of the fan duct air supply status detection sensor based on posture recognition technology are limitedly installed on the movable mechanism, so that the angle formed between the main head and the auxiliary head is the same as the angle of the movable mechanism and changes synchronously, thereby achieving the purpose of calibrating the zero point, linearity and accuracy of the sensor by using a high-precision angle ruler.

[0027] This calibration method can be used to calibrate the zero point, linearity and accuracy of the angle detected during the production process, factory acceptance inspection and on-site use of the wind duct air supply status detection sensor based on posture recognition technology. It can conveniently, quickly and accurately calibrate the zero point, linearity and accuracy of the wind duct air supply status detection sensor to ensure the working reliability and measurement accuracy of the wind duct air supply status detection sensor. It also helps to promote and apply mining wind duct air supply status detection sensors with posture recognition technology based on the inclination detection principle, and promote the technical upgrade of the detection layer equipment of the safety monitoring system.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 It is a detection principle diagram of a wind tube air supply state detection sensor based on posture recognition technology in the background technology;

[0031] Figure 2 It is a structural schematic diagram of a calibration device for a wind duct air supply state detection sensor based on a posture recognition technology in an embodiment;

[0032] Figure 3 It is a schematic diagram of the principle of a method for adjusting a sensor for detecting the air supply status of a hair dryer based on the posture recognition technology in an embodiment.

[0033] Figure markings: 1-first swing arm, 11-main meter head limit baffle, 2-second swing arm, 22-auxiliary meter head limit baffle, 3-follow-up shaft, 4-angle ruler, 41-first measuring arm, 42-second measuring arm, 43-angle ruler shaft, 44-display unit, 5-fixed shaft, 6-shaft fixing seat, 7-translation guide rail, 8-roller, 81-roller shaft, 9-guide rail limit block, 101-main meter head, 102-auxiliary meter head, 103-meter head communication line. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] See also Figure 2-3 , is a calibration device for a wind tube air supply state detection sensor based on posture recognition technology, comprising a first swing arm 1, a second swing arm 2, a follower shaft 3, an angle ruler 4, a fixed shaft 5, a translation guide rail 7 and a roller 8, wherein the right end of the first swing arm 1 and the left end of the second swing arm 2 are rotationally connected through the follower shaft 3, and swing relatively with the follower shaft 3 as the axis, and the swing is flexible;

[0038] A main head limit baffle 11 for fixing the main head 101 in the air supply status detection sensor of the air duct is provided on the first swing arm 1, and a sub-head limit baffle 22 for fixing the sub-head 102 in the air supply status detection sensor of the air duct is provided on the second swing arm 2, so as to limit the installation position and direction of the main head and the sub-head respectively, so that after the main head 101 and the sub-head 102 are fixedly installed in the main head limit baffle 11 and the sub-head limit baffle 22, the angle formed by the main head and the sub-head is equal to the angle formed by the first swing arm and the second swing arm.

[0039] Specifically, the main meter head limit baffle 11 is arranged on a side of the first swing arm 1 away from the translation guide rail 7 , and the auxiliary meter head limit baffle 22 is arranged on a side of the second swing arm 2 away from the translation guide rail 7 .

[0040] The main meter head limit baffle 11 and the auxiliary meter head limit baffle 22 have the same structure, both including an L-shaped buckle plate fixedly arranged on the side surface of the swing arm away from the translation guide rail 7 and two parallel baffles respectively arranged on both sides of the side surface of the swing arm away from the translation guide rail 7, thereby limiting the installation position and direction of the main meter head and the auxiliary meter head.

[0041] The angle ruler 4 is a high-precision angle ruler to improve the accuracy of angle detection, which includes a first measuring arm 41, a second measuring arm 42, an angle ruler rotating shaft 43 and a display unit 44, the first measuring arm 41 is connected and fixed to the first swing arm 1 by spot welding, riveting or threaded fixing, the second measuring arm 42 is connected and fixed to the second swing arm 2 by spot welding, riveting or threaded fixing, and the first measuring arm 41 and the second measuring arm 42 are rotatably connected by the angle ruler rotating shaft 43, and the angle ruler rotating shaft 43 is coaxial with the follower rotating shaft 3, so that the angle formed by the first swing arm 1 and the second swing arm 2 is equal to the angle of the angle ruler 4;

[0042] The first swing arm 1 and the first measuring arm 41 are arranged in parallel, and the second swing arm 2 and the second measuring arm 42 are arranged in parallel;

[0043] The angle ruler is fixedly mounted on one side of the assembly formed by the first swing arm 1, the second swing arm 2 and the follower shaft 3, with the display unit 44 facing outwards for easy observation;

[0044] The first swing arm 1 is rotatably connected to the shaft fixing seat 6 via the fixed shaft 5, and can flexibly swing around the axis of the fixed shaft 5;

[0045] The rotating shaft fixing seat 6 is connected and fixed to one end of the translation guide rail 7 by welding or thread fixing;

[0046] The roller 8 is rotatably connected to the lower end of the second swing arm 2 via a roller shaft 81, and can rotate freely relative to each other;

[0047] The roller 8 is placed on the translation guide rail 7, and the roller 8 can roll freely along the left and right direction of the translation guide rail 8 (the length direction of the translation guide rail 8);

[0048] A guide rail limiting block 9 is provided at one end of the translation guide rail 7 away from the rotating shaft fixing seat to limit the roller 8 .

[0049] Specifically, when the roller 8 moves to the leftmost end, the first swing arm 1 and the second swing arm 2 are brought together, and the angle formed is 0°. At this time, the first measuring arm 41 and the second measuring arm 2 are brought together, and the angle formed is 0°.

[0050] When the roller 8 moves to the rightmost end, the first swing arm 1 and the second swing arm 2 are unfolded and form a maximum angle. At this time, the first measuring arm 41 and the second measuring arm 2 are opened and also form a maximum angle.

[0051] The maximum angle can be adaptively adjusted according to the calibration requirements of the air supply status detection sensor of the air duct based on the posture recognition technology, and is preferably 90° in this embodiment.

[0052] Key References Figure 2 , is a method for adjusting a fan air supply state detection sensor based on posture recognition technology, which specifically includes the following steps:

[0053] S1. First, the translation guide rail 7 in the above adjustment device is placed horizontally;

[0054] S2. Then, the bottom surface of the main meter head 101 in the air supply state detection sensor of the wind tube based on the posture recognition technology is closely attached to the upper surface of the first swing arm 1 (the side surface away from the translation guide rail 7), and installed in the main meter head limit baffle 11, and under the restriction of the main meter head limit baffle 11, ensure that the axis direction of the main meter head is parallel to the first measuring arm 41;

[0055] S3. Then, the bottom surface of the sub-meter head 102 in the wind tube air supply state detection sensor based on the posture recognition technology is closely attached to the upper surface of the second swing arm 2 (the side surface away from the translation guide rail 7), and installed in the sub-meter head limit baffle 22, and under the restriction of the sub-meter head limit baffle 22, ensure that the axis direction of the sub-meter head is parallel to the second measuring arm 2;

[0056] Through steps S2 and S3, the plane formed by the main meter head 101, the auxiliary meter head 102 and the meter head communication line 103 coincides with the plane formed by the first swing arm 1, the second swing arm 2 and the follower shaft 3, so that the angle formed by the axis direction of the main meter head and the axis direction of the auxiliary meter head is equal to the angle formed by the first swing arm 1 and the second swing arm 2 and the angle of the angle ruler 4;

[0057] S4. When the first swing arm 1 and the second swing arm 2 are brought together, the angle formed is 0°, and the angle displayed on the angle ruler is 0°. At this time, the angle between the main meter head and the auxiliary meter head is calibrated as the initial zero point;

[0058] S5. Move the roller 8 to the right along the translation guide 7, the angle between the first swing arm 1 and the second swing arm 2 gradually increases, and the angle displayed by the angle ruler 4 increases synchronously, that is, the angle between the main header and the auxiliary header gradually increases;

[0059] S6. The roller 8 evenly selects several angle values ​​(corresponding to the angle values ​​displayed on the angle ruler) from the initial zero position to the guide rail limit block, and uses this angle value to calibrate the linearity and accuracy of the angle between the main meter head and the auxiliary meter head.

[0060] Furthermore, by setting different angles of the air supply state detection sensor of the air duct to correspond to different air supply state threshold values ​​of the air duct, the air supply volume state of the air duct can be determined.

[0061] The key to this embodiment is that the angle formed by the first swing arm 1, the second swing arm 2 and the follower shaft 3 is the same as the angle of the angle ruler, forming a movable mechanism for synchronously changing the angle, and then by moving the roller away from the shaft fixing seat along the translation guide rail, the synchronous change of the angle formed by the first swing arm 1 and the first swing arm 2, the main head and the auxiliary head, and the first measuring arm 41 and the second measuring arm 42 is achieved, and then the zero point, linearity and accuracy of the air duct air supply status detection sensor are calibrated.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A calibration device for a fan air supply state detection sensor, the calibration device is used to calibrate the fan air supply state detection sensor based on posture recognition technology, and is characterized by: It comprises a first swing arm, a second swing arm, an angle ruler and a translation guide rail, wherein one end of the first swing arm is rotatably connected to one end of the translation guide rail, the other end of the first swing arm is rotatably connected to one end of the second swing arm, and the other end of the second swing arm is slidably connected to the translation guide rail; A main meter head limit baffle plate for fixing and installing a main meter head in the air supply state detection sensor of the air duct is provided on the first swing arm, and a sub-meter head limit baffle plate for fixing and installing a sub-meter head in the air supply state detection sensor of the air duct is provided on the second swing arm, and the angle formed by the main meter head and the sub-meter head after being fixedly installed in the main meter head limit baffle plate and the sub-meter head limit baffle plate is equal to the angle formed by the first swing arm and the second swing arm; The angle ruler is fixedly mounted on the assembly formed by the first swing arm and the second swing arm, and is used to detect the angle formed by the first swing arm and the second swing arm, and further detect the angle formed by the main meter head and the auxiliary meter head.

2. The device for adjusting the air supply status detection sensor of the air duct according to claim 1, characterized in that: The first swing arm and the second swing arm are rotationally connected via a follower shaft.

3. The device for adjusting the air supply status detection sensor of the air duct according to claim 2, characterized in that: The angle ruler includes a first measuring arm, a second measuring arm, an angle ruler rotating shaft and a display unit, the first measuring arm is connected and fixed to the first swing arm, the second measuring arm is connected and fixed to the second swing arm, the first measuring arm and the second measuring arm are rotatably connected through the angle ruler rotating shaft, and the angle ruler rotating shaft is coaxial with the follower rotating shaft, the first swing arm and the first measuring arm are arranged in parallel, and the second swing arm and the second measuring arm are arranged in parallel, so that the angle formed by the first swing arm and the second swing arm is equal to the angle of the angle ruler, and then the angle formed by the first swing arm and the second swing arm is detected by the angle ruler.

4. The device for adjusting the air supply status detection sensor of the air duct according to claim 3, characterized in that: The angle ruler is fixedly mounted on one side of an assembly formed by the first swing arm, the second swing arm and the follower shaft, and the display unit faces outwards for easy observation.

5. The device for adjusting the air supply status detection sensor of the air duct according to claim 1, characterized in that: The main meter head limit baffle is arranged on a side of the first swing arm away from the translation guide rail, and the auxiliary meter head limit baffle is arranged on a side of the second swing arm away from the translation guide rail.

6. The device for adjusting the air supply status detection sensor of the air duct according to claim 1, characterized in that: The first swing arm is rotatably connected to a rotation shaft fixing seat fixedly installed at one end of the translation guide rail through a fixed rotation shaft, so as to be rotatably connected to one end of the translation guide rail.

7. The device for adjusting the air supply status detection sensor of the air duct according to claim 6, characterized in that: A roller placed on the translation guide rail is rotatably connected to one end of the second swing arm away from the first swing arm so as to be slidably connected to the translation guide rail.

8. The device for adjusting the air supply status detection sensor of the air duct according to claim 7, characterized in that: A guide rail limiting block is provided on one end of the translation guide rail away from the rotating shaft fixing seat to limit the roller.

9. A method for calibrating a sensor for detecting the air supply status of a fan duct, providing a calibration device for the sensor for detecting the air supply status of a fan duct as claimed in any one of claims 1 to 8, comprising the following steps: S1. The duct air supply state detection sensor adjustment device in the translation guide rail is placed horizontally; S2. The main meter head is fixedly installed in the main meter head limit baffle, and the axis direction of the main meter head is parallel to the first swing arm; S3. The auxiliary meter head is fixedly installed in the auxiliary meter head limit baffle, and the axis direction of the auxiliary meter head is parallel to the second swing arm. Through steps S2 and S3, the plane formed by the main meter head and the auxiliary meter head coincides with the plane formed by the first swing arm and the second swing arm, and the angle formed by the axis direction of the main meter head and the axis of the auxiliary meter head is equal to the angle formed by the first swing arm and the second swing arm and the angle of the angle ruler; S4. When the first swing arm and the second swing arm are adjusted to be close together, the angle formed is 0°, and the angle displayed on the angle ruler is 0°. At this time, the angle formed by the main header and the auxiliary header is calibrated as the initial zero point; S5. Move the second swing arm away from one end of the first swing arm along the translation guide rail, so that the angle formed by the first swing arm and the second swing arm gradually increases, the angle displayed by the angle ruler increases synchronously, and the angle formed by the main meter head and the auxiliary meter head gradually increases, until the end of the second swing arm away from the first swing arm reaches the end of the translation guide rail; S6. Evenly select several angle values ​​displayed by the angle scale between the initial zero point position and the end of the translation guide rail, and use this angle value to calibrate the linearity and accuracy of the angle formed by the main head and the auxiliary head to complete the zero point, linearity and accuracy calibration of the air duct air supply status detection sensor based on posture recognition technology.

10. The method for calibrating a sensor for detecting air supply status of a fan according to claim 9, characterized in that: A guide rail limiting block is provided at the end of the translation guide rail to limit the movement of the second swing arm away from one end of the first swing arm.

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