High-sensitivity infrared matrix sensor

Abstract

The invention discloses a high-sensitivity infrared matrix sensor, and relates to the field of infrared matrix sensors, the high-sensitivity infrared matrix sensor comprises an angle adjusting device and an infrared sensing device, and the infrared sensing device comprises a protective shell, an infrared sensor, a low-speed motor, a driving gear, a movable belt, a driven gear, a mounting block, a moving plate and a wiping plate. A low-speed motor drives a driving gear to rotate to enable a moving plate to move, a wiping plate enables wiping cloth to be tightly attached to the outer surface of an infrared sensor under the elastic force action of a plurality of springs, and the wiping cloth automatically wipes away dust and pollution covering the outer surface of the infrared sensor; the situation that dust and pollutants affect the acquisition capacity of the infrared sensor on infrared signals after the infrared sensor is used for a long time is avoided, the sensitivity of the infrared sensor in the using process is improved, the using effect of the infrared sensor is improved, meanwhile, the image recognition module is additionally arranged to conduct face recognition and recording on a moving target passing through a gate, and the using safety of the system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of infrared matrix sensors, in particular to a high-sensitivity infrared matrix sensor. Background Art

[0002] An infrared sensor is a sensor that emits infrared light beams. Its principle is to detect the presence of a target by reflecting the infrared light beam. Active infrared sensors have the advantages of fast response speed and wide application range, but because they need to emit infrared light beams, their power consumption is relatively high. Active infrared sensors are suitable for scenarios that require fast response and low power consumption requirements, such as human body detection in the security field, automatic doors, elevators, etc.

[0003] For example, Chinese patent CN108370422B, "A system for simultaneously acquiring color and near-infrared images", includes: a single matrix sensor, which includes first, second and third types of pixels sensitive to corresponding visible colors, and a fourth type of full-color pixels, which are also sensitive in the near-infrared; and a signal processing circuit, which is configured to: reconstruct a first group of monochrome images from signals generated by the first, second and third types of pixels, respectively; reconstruct a full-color image from signals generated by the fourth type of pixels; reconstruct a second group of monochrome images from signals generated by the first, second and third types and from the full-color image; reconstruct a color image from the image of the first group and from the full-color image, and reconstruct at least one image in the near-infrared from the image of the second group and from the full-color image.

[0004] However, in the prior art, during the use of the infrared sensor for mining, the infrared sensor is used to detect moving targets. When it is detected that a person or object has reached the gate area, the gate can be automatically controlled to open. However, the infrared sensor for mining is easily disturbed by the environment during use. During the opening / closing process of the gate, dust on the ground will be raised. Dust, pollutants and other substances in the environment will cover the sensing area of ​​the infrared sensor, reducing the sensor's ability to collect infrared signals, thereby reducing the sensitivity of the infrared sensor and affecting the normal use of the infrared sensor for mining. In view of the above problems, a high-sensitivity infrared matrix sensor is proposed. Summary of the invention

[0005] The object of the present invention is to provide a high-sensitivity infrared matrix sensor to solve the problems raised by the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-sensitivity infrared matrix sensor, comprising an angle adjustment device and an infrared sensing device, wherein the infrared sensing device comprises a protective shell, an infrared sensor, a slow motor, a driving gear, a movable belt, a driven gear, a mounting block, a moving plate and a wiping plate, wherein the inner side of the protective shell is fixedly mounted on both ends of the infrared sensor, a brush plate is fixedly connected to the inner side of one end of the protective shell, the output end of the slow motor is fixedly connected to the top end of the driving gear, the outer sides of the driving gear and the driven gear are meshed with the inner side of the movable belt, and the The top of the mounting block is fixedly connected to the bottom of the movable belt, and the bottom of the mounting block is fixedly connected to the top of the movable plate, a cavity is opened on one side of the movable plate, and a plurality of springs are evenly arranged inside the cavity, one side of the wiping plate is fixedly connected to one end of the spring, and a wiping cloth is bonded to the other side of the wiping plate, the angle adjustment device comprises a mounting plate, a steering motor 1, a rotating arm, a steering motor 2, a movable arm and a steering motor 3, one end of the movable arm is fixedly mounted to one end of the steering motor 3, and the output end of the steering motor 3 is fixedly mounted to one end of a protective shell.

[0007] Preferably, the top end of the driven gear is fixedly mounted to the top end of the protective shell, and limiting grooves are symmetrically provided at both ends of the movable plate.

[0008] Preferably, both ends of the wiping plate are symmetrically fixedly connected with limiting protrusions, and one end of the limiting protrusion is slidably mounted on the inner side of the limiting groove.

[0009] Preferably, one end of the second steering motor is fixedly mounted to one end of the rotating arm, and the output end of the second steering motor is fixedly connected to one end of the movable arm.

[0010] Preferably, the output end of the steering motor 1 is fixedly connected to the bottom end of the rotating arm, and a mounting seat is fixedly installed at the bottom end of the steering motor 1, and the bottom end of the mounting seat is welded to the top of the mounting plate.

[0011] Preferably, it also includes a power supply module, an image recognition module, an infrared emission module, an infrared detection module, an auxiliary control module, an industrial computer module, a control module, an audio-visual prompt module, a normally open control module, a terminal module and a storage module;

[0012] The power supply module is used to supply power to the camera of the image recognition module and the infrared matrix transmitter of the infrared transmission module;

[0013] The image recognition module realizes face recognition and moving target camera functions through a camera. When a moving target appears within the infrared threshold range, the camera takes real-time photos and recognizes the face, and then transmits the shooting and recognition results to the terminal module and the storage module;

[0014] The infrared transmitting module transmits an infrared beam at an emission angle a through an infrared matrix transmitter, and when the infrared beam encounters a human body or an object, the infrared beam is reflected;

[0015] After receiving and detecting the reflected light beam through the infrared detector, the infrared detection module converts the infrared reflected echo signal into a target distance signal, obtains array acquisition data and offset distance b, transmits the target distance signal to the industrial computer module, calculates the distance c between the infrared matrix transmitter and the moving target by using triangular geometric relationship, and classifies the array acquisition data;

[0016] The auxiliary control module receives the signal through the touch sensor and converts it into an electrical signal, and then transmits the electrical signal to the industrial computer module;

[0017] The industrial computer module exchanges data with the control module and the sound and light prompt module through asynchronous serial communication, receives signals from the infrared detection module and the auxiliary control module, completes the tasks of issuing control instructions, setting parameters, sound and light control and state acquisition, and sets the sensing threshold of the infrared detection module at the same time;

[0018] The control module is used to start the gate drive mechanism after receiving the control instruction of the industrial computer module, and automatically open the gate;

[0019] The sound and light prompt module is used to turn on the sound and light prompt after receiving the control instruction of the industrial computer module;

[0020] The normally open control module inputs an emergency signal to the industrial computer module through the controller, and the control module uses a dry contact method to control the gate to be normally open after receiving the emergency signal from the industrial computer;

[0021] The terminal module is used to receive the shooting and recognition information of the image recognition module and the classification result information of the classification module;

[0022] The storage module is used to store the shooting and recognition information and the classification result information.

[0023] Preferably, the infrared detection module includes a reflection signal processing module, a feature extraction module and a classification module;

[0024] The reflection signal processing module uses the K-means algorithm to perform clustering preprocessing on the array acquisition data, separates the moving target signal from the background noise, obtains data that meets the target motion range, and transmits the data to the feature extraction module;

[0025] The feature extraction module uses a least squares fitting method to extract feature information that can characterize the moving distance and direction of the moving target;

[0026] The classification module uses a KNN classifier to identify and classify the moving direction of the moving target, and transmits the identification and classification results to the terminal module and the storage module.

[0027] Preferably, when the KNN classifier performs identification and classification, the feature information is used as a test sample x, and n nearest neighbors of the test sample x are taken. When most of the K nearest neighbors belong to one category, x belongs to the category, including the following steps:

[0028] S1. Assume that among the d samples of feature information, there are d1 samples from class e1, d2 samples from class e2, and d3 samples from class e3;

[0029] S2. If K1, K2, and K3 are the number of samples belonging to the e1, e2, and e3 categories among the K nearest neighbors, the discriminant function can be located as: g i (x) = K i ,i=1,2,...,f;

[0030] S3. When the decision rule satisfies the following expression When the decision x∈e j , when K=1, it is the nearest neighbor method.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. In the present invention, a slow motor drives a driving gear to rotate, thereby driving a movable belt to rotate, and a movable plate moves with the movable belt. When the movable plate moves to one end of the infrared sensor, the wiping cloth fits against the outer surface of the infrared sensor. At the same time, under the elastic force of a plurality of springs, the wiping plate makes the wiping cloth close to the outer surface of the infrared sensor without damaging the infrared sensor. When the movable plate moves with the movable belt, the wiping cloth moves along the outer surface of the infrared sensor, thereby wiping the outer surface of the infrared sensor, automatically erasing dust and pollution covering the outer surface of the infrared sensor, without the need for manual erasing by an operator, thereby preventing dust and pollution from affecting the infrared sensor's ability to collect infrared signals after long-term use, thereby improving the sensitivity of the infrared sensor during use, and improving the use effect of the infrared sensor.

[0033] 2. In the present invention, by setting an angle adjustment device, steering motor 1 can drive the rotating arm to rotate, steering motor 2 can drive the movable arm to rotate, and steering motor 3 can drive the infrared sensor device to rotate. Through the three steering motors, the direction adjustment of multiple degrees of freedom of the infrared sensor device can be realized, thereby facilitating the operator to adjust the gate entrance detection area of ​​the infrared sensor device and improving the use effect of the infrared sensor device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A three-dimensional diagram of a high-sensitivity infrared matrix sensor of the present invention;

[0035] Figure 2 A rear perspective view of a high-sensitivity infrared matrix sensor of the present invention;

[0036] Figure 3 It is a structural schematic diagram of an infrared sensing device of a high-sensitivity infrared matrix sensor of the present invention;

[0037] Figure 4 It is a structural schematic diagram of an infrared sensing device of a high-sensitivity infrared matrix sensor of the present invention;

[0038] Figure 5 It is a schematic diagram of the upward structure of a brush plate of a high-sensitivity infrared matrix sensor of the present invention;

[0039] Figure 6 It is a structural schematic diagram of a moving plate of a high-sensitivity infrared matrix sensor of the present invention;

[0040] Figure 7 A side sectional view of an infrared sensing device of a high-sensitivity infrared matrix sensor of the present invention;

[0041] Figure 8 This is an application system diagram of a high-sensitivity infrared matrix sensor of the present invention.

[0042] In the figure: 2, angle adjustment device; 21, mounting plate; 22, mounting seat; 23, steering motor 1; 24, rotating arm; 25, steering motor 2; 26, movable arm; 27, steering motor 3; 3, infrared sensor device; 31, protective shell; 32, infrared sensor; 33, slow motor; 34, driving gear; 35, movable belt; 36, driven gear; 37, mounting block; 38, brush plate; 39, moving plate; 310, wiping plate; 311, wiping Cloth; 312, cavity; 313, spring; 314, limiting convex rod; 315, limiting groove; 4, power supply module; 5, image recognition module; 6, infrared emission module; 7, infrared detection module; 8, auxiliary control module; 9, industrial computer module; 10, control module; 11, sound and light prompt module; 12, normally open control module; 13, terminal module; 14, storage module; 71, reflection signal processing module; 72, feature extraction module; 73, classification module. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1

[0045] Reference Figure 1 - Figure 7 As shown: a high-sensitivity infrared matrix sensor, including an angle adjustment device 2 and an infrared sensing device 3, the infrared sensing device 3 includes a protective shell 31, an infrared sensor 32, a slow motor 33, a driving gear 34, a movable belt 35, a driven gear 36, a mounting block 37, a movable plate 39 and a wiping plate 310, the inner side of the protective shell 31 is fixedly installed with both ends of the infrared sensor 32, a brush plate 38 is fixedly connected to the inner side of one end of the protective shell 31, the output end of the slow motor 33 is fixedly connected to the top of the driving gear 34, the outer sides of the driving gear 34 and the driven gear 36 are meshed with the inner side of the movable belt 35, the top of the mounting block 37 is fixedly connected to the bottom of the movable belt 35, and the bottom of the mounting block 37 is fixedly connected to the top of the movable plate 39, a cavity 312 is opened on one side of the movable plate 39, and a plurality of springs 313 are evenly arranged inside the cavity 312, one side of the wiping plate 310 is fixedly connected to one end of the spring 313, and the other end of the wiping plate 310 is fixedly connected to one end of the spring 313 A wiping cloth 311 is bonded to one side, and the angle adjustment device 2 includes a mounting plate 21, a steering motor 1 23, a rotating arm 24, a steering motor 25, a movable arm 26 and a steering motor 3 27. One end of the movable arm 26 is fixedly installed with one end of the steering motor 3 27, and the output end of the steering motor 3 27 is fixedly installed with one end of the protective shell 31. The top of the driven gear 36 is fixedly installed with the top of the protective shell 31. The two ends of the movable plate 39 are symmetrically provided with limiting grooves 315. The two ends of the wiping plate 310 are symmetrically fixedly connected with limiting convex rods 314. One end of the limiting convex rod 314 is slidably installed with the inner side of the limiting groove 315. One end of the steering motor 25 is fixedly installed with one end of the rotating arm 24, and the output end of the steering motor 25 is fixedly connected with one end of the movable arm 26. The output end of the steering motor 1 23 is fixedly connected with the bottom end of the rotating arm 24, and the bottom end of the steering motor 1 23 is fixedly installed with a mounting seat 22, and the bottom end of the mounting seat 22 is welded to the top of the mounting plate 21.

[0046] In this embodiment, when in use, the steering motor 1 23 can drive the rotating arm 24 to rotate, the steering motor 25 can drive the movable arm 26 to rotate, and the steering motor 3 27 can drive the infrared sensor device 3 to rotate. Through the three steering motors (steering motor 1 23, steering motor 25 and steering motor 3 27), the direction adjustment of multiple degrees of freedom of the infrared sensor device 3 can be achieved, so that the operator can adjust the gate entrance detection area (infrared threshold range) of the infrared sensor device 3, thereby improving the use effect of the infrared sensor device 3;

[0047] At the same time, by improving the infrared sensor device 3, the infrared sensor 32 is used to receive and detect the reflected light beam, and the controller can control the slow motor 33 to start and stop at a fixed time every day. When the slow motor 33 is turned on, the slow motor 33 drives the driving gear 34 to rotate, and the outer wall of the driving gear 34 and the inner side of the movable belt 35 are meshed with each other, thereby driving the movable belt 35 to rotate. The moving plate 39 is installed at the bottom of the movable belt 35 through the mounting block 37 at the top, and the moving plate 39 moves with the movable belt 35. Figure 3 As shown, when the movable plate 39 moves to one end of the infrared sensor 32, the wiping cloth 311 fits against the outer surface of the infrared sensor 32, and at the same time, under the elastic force of the plurality of springs 313, the wiping plate 310 makes the wiping cloth 311 fit tightly against the outer surface of the infrared sensor 32 without damaging the infrared sensor 32. When the movable plate 39 moves with the movable belt 35, the wiping cloth 311 moves along the outer surface of the infrared sensor 32, thereby wiping the outer surface of the infrared sensor 32, and automatically erasing the dust and pollution covering the outer surface of the infrared sensor 32, without the need for manual wiping by the operator. Avoid dust and pollutants from affecting the infrared sensor 32's ability to collect infrared signals after long-term use, improve the sensitivity of the infrared sensor 32 during use, and improve the use effect of the infrared sensor 32; in addition, when the movable plate 39 rotates one circle with the movable belt 35, the wiping cloth 311 wipes off the dust on the outer surface of the infrared sensor 32, and when the wiping cloth 311 rotates with the movable belt 35 and passes through the brush plate 38, the outer side of the brush plate 38 contacts the wiping cloth 311, and the brush surface on the brush plate 38 can clean the dust on the wiping cloth 311, so that the wiping cloth 311 can continue to be used.

[0048] Embodiment 2

[0049] like Figure 8As shown, it also includes a power supply module 4, an image recognition module 5, an infrared transmission module 6, an infrared detection module 7, an auxiliary control module 8, an industrial computer module 9, a control module 10, an audio-visual prompt module 11, a normally open control module 12, a terminal module 13 and a storage module 14; the power supply module 4 is used to power the camera of the image recognition module 5 and the infrared matrix transmitter of the infrared transmission module 6; the image recognition module 5 realizes face recognition and moving target camera functions through the camera. When the moving target appears within the infrared threshold range, the camera takes real-time photos and recognizes the face, and then transmits the shooting and recognition results to the terminal module 13 and the storage module 14; the infrared transmission module 6 transmits an infrared beam according to the emission angle a through the infrared matrix transmitter. When encountering a human body or an object, the infrared beam is reflected; after the infrared detection module 7 receives and detects the reflected beam through the infrared detector, it converts the infrared reflection echo signal into a target distance signal, obtains the array acquisition data and the offset distance b, transmits the target distance signal to the industrial computer module 9, and uses the triangular geometric relationship to calculate the distance between the infrared matrix transmitter and the moving target The distance c is calculated, and the array data is classified and processed; the auxiliary control module 8 receives the signal through the touch sensor and converts it into an electrical signal, and then transmits the electrical signal to the industrial computer module 9; the industrial computer module 9 interacts with the control module 10 and the sound and light prompt module 11 through asynchronous serial communication, receives the signal of the infrared detection module 7 and the auxiliary control module 8, completes the control instruction issuance, parameter setting, sound and light control and state acquisition tasks, and sets the sensing threshold of the infrared detection module 7; the control module 10 is used to start the gate drive mechanism after receiving the control instruction of the industrial computer module 9, and automatically open the gate; the sound and light prompt module 11 is used to open the sound and light prompter after receiving the control instruction of the industrial computer module 9; the normally open control module 12 inputs an emergency signal to the industrial computer module 9 through the controller, and the control module 10 uses a dry contact method to control the gate to be normally open after receiving the emergency signal of the industrial computer; the terminal module 13 is used to receive the shooting and recognition information of the image recognition module 5, and at the same time receives the classification result information of the classification module 73; the storage module 14 is used to store the shooting and recognition information and the classification result information.

[0050] In this embodiment, preferably, the infrared detection module 7 includes a reflection signal processing module 71, a feature extraction module 72 and a classification module 73; the reflection signal processing module 71 uses a K-means algorithm to perform clustering preprocessing on the array acquisition data, separates the moving target signal from the background noise, obtains data that meets the target motion range, and transmits the data to the feature extraction module 72; the feature extraction module 72 uses a least squares fitting method to extract feature information that can characterize the movement distance and direction of the moving target; the classification module 73 uses a KNN classifier to identify and classify the movement direction of the moving target, and transmits the identification and classification results to the terminal module 13 and the storage module 14.

[0051] In this embodiment, preferably, when the KNN classifier performs identification and classification, the feature information is used as the test sample x, and n nearest neighbors of the test sample x are taken. When most of the K nearest neighbors belong to one category, that is, x belongs to the category, the following steps are included:

[0052] S1. Assume that among the d samples of feature information, there are d1 samples from class e1, d2 samples from class e2, and d3 samples from class e3;

[0053] S2. If K1, K2, and K3 are the number of samples belonging to the e1, e2, and e3 categories among the K nearest neighbors, the discriminant function can be located as: g i (x) = K i ,i=1,2,...,f;

[0054] S3. When the decision rule satisfies the following expression When the decision x∈e j , when K=1, it is the nearest neighbor method.

[0055] In this embodiment, by adding an image recognition module 5, an auxiliary control module 8 and a storage module 14, the image recognition module 5 realizes face recognition and moving target camera functions through a camera. When the moving target appears within the infrared threshold range, the camera takes real-time photos and recognizes the face, and then transmits the shooting and recognition results to the terminal module 13 and the storage module 14; the auxiliary control module 8 receives the signal through the touch sensor and converts it into an electrical signal, and then transmits the electrical signal to the industrial computer module 9; the normally open control module 12 inputs an emergency signal to the industrial computer module 9 through the controller, and the control module 10 uses a dry contact method to control the gate to be normally open after receiving the emergency signal of the industrial computer; the terminal module 13 is used to receive the shooting and recognition information of the image recognition module 5, and at the same time receive the classification result information of the classification module 73; the storage module 14 can store the shooting and recognition information and the classification result information; the face recognition and shooting records of people passing through the gate are performed, and the information is stored in the storage module 14, which is convenient for subsequent viewing and improves the safety of use; the auxiliary control module 8 and the normally open control module 12 can make the gate open or keep it normally open, which is convenient for use.

[0056] The use method and working principle of the device: The infrared sensor is composed of an angle adjustment device 2 and an infrared sensor device 3. During installation, the mounting plate 21 of the angle adjustment device 2 can be fixed to the top area of ​​the gate with bolts, so that the infrared sensor device 3 can detect the gate entrance area. The angle adjustment device 2 and the infrared sensor device 3 are both electrically connected to the control device. When in use, the direction adjustment of multiple degrees of freedom of the infrared sensor device 3 can be achieved through three steering motors (steering motor 1 23, steering motor 2 25 and steering motor 3 27), so as to facilitate the operator to adjust the gate entrance detection area (infrared threshold range) of the infrared sensor device 3, thereby improving the use effect of the infrared sensor device 3;

[0057] At the same time, by improving the infrared sensor device 3, the infrared sensor 32 is used to receive and detect the reflected light beam, and the controller can control the slow motor 33 to start and stop at a fixed time every day. When the slow motor 33 is turned on, the slow motor 33 drives the driving gear 34 to rotate, drives the movable belt 35 to rotate, and the movable plate 39 moves with the movable belt 35. At the same time, the wiping plate 310, under the elastic force of multiple springs 313, makes the wiping cloth 311 close to the outer surface of the infrared sensor 32 without damaging the infrared sensor 32. When the movable plate 39 moves with the movable belt 35, the wiping cloth 311 moves along the outer surface of the infrared sensor 32, thereby wiping the outer surface of the infrared sensor 32, and automatically erasing the dust and pollution covering the outer surface of the infrared sensor 32, so as to avoid the dust and pollutants after the infrared sensor 32 is used for a long time. The influence of its infrared signal collection ability is improved, and the sensitivity of the infrared sensor 32 when in use is improved;

[0058] Through the combination of power supply module 4, image recognition module 5, infrared transmitting module 6, infrared detection module 7, auxiliary control module 8, industrial computer module 9, control module 10, sound and light prompt module 11, normally open control module 12, terminal module 13 and storage module 14, during the use of the infrared sensor device 3, the infrared transmitting module 6 transmits an infrared light beam according to the emission angle a through the infrared matrix transmitter, and when encountering a human body or an object, the infrared light beam is reflected; the infrared detection module 7 receives and detects the reflected light beam through the infrared detector (infrared sensor 32), and converts the infrared reflection echo signal into the target distance After receiving the signal, the array acquisition data and the offset distance b are obtained, and the target distance signal is transmitted to the industrial computer module 9; the industrial computer module 9 receives the signal of the infrared detection module 7, and sends the gate opening instruction and the sound and light opening instruction to the control module 10 and the sound and light prompt module 11; the control module 10 starts the gate driving mechanism after receiving the control instruction of the industrial computer module 9, and automatically opens the gate; the sound and light prompt module 11 starts the sound and light prompter after receiving the control instruction of the industrial computer module 9, thereby completing the automatic detection of people and objects at the gate entrance, and automatically controls the gate to open after detection, so that people and objects can pass through the gate smoothly and safely;

[0059] At the same time, an image recognition module 5, an auxiliary control module 8 and a storage module 14 are added. The image recognition module 5 realizes face recognition and moving target camera functions through a camera. When a moving target appears within the infrared threshold range, the camera takes real-time photos and recognizes faces, and then transmits the shooting and recognition results to the terminal module 13 and the storage module 14; the auxiliary control module 8 receives signals through a touch sensor and converts them into electrical signals, and then transmits the electrical signals to the industrial computer module 9; the normally open control module 12 inputs an emergency signal to the industrial computer module 9 through a controller, and the control module 10 uses a dry contact method to control the gate to be normally open after receiving the emergency signal of the industrial computer; the storage module 14 can store shooting and recognition information and classification result information; face recognition and shooting records are performed on people passing through the gate, and the information is stored in the storage module 14, which is convenient for subsequent viewing and improves safety of use;

[0060] In addition, the infrared detection module 7 includes a reflection signal processing module 71, a feature extraction module 72 and a classification module 73. After the infrared detection module 7 receives and detects the reflected light beam through the infrared detector, it converts the infrared reflection echo signal into a target distance signal, and transmits the target distance signal to the industrial computer module 9, calculates the distance c between the infrared matrix transmitter and the moving target by using the triangular geometric relationship, and classifies the array acquisition data. The reflection signal processing module 71 uses the K-means algorithm to perform clustering preprocessing on the array acquisition data, separates the moving target signal from the background noise, obtains data that meets the target motion range, and transmits the data to the feature extraction module 72; the feature extraction module 72 uses the least squares fitting method to extract feature information that can characterize the moving distance and direction of the moving target; the classification module 73 uses the KNN classifier to identify and classify the moving direction of the moving target, and transmits the identification and classification results to the terminal module 13 and the storage module 14; this method can successfully identify multiple moving directions of the moving target, and at the same time store and record the moving direction of the person passing through the gate, and can count the moving direction of the person passing through the gate. The infrared detection module 7 can be used on gates in other occasions (such as stations).

[0061] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-sensitivity infrared matrix sensor, characterized in that: The invention comprises an angle adjustment device (2) and an infrared sensor device (3), wherein the infrared sensor device (3) comprises a protective shell (31), an infrared sensor (32), a slow motor (33), a driving gear (34), a movable belt (35), a driven gear (36), a mounting block (37), a movable plate (39) and a wiping plate (310), wherein the inner side of the protective shell (31) is fixedly mounted on both ends of the infrared sensor (32), a brush plate (38) is fixedly connected to the inner side of one end of the protective shell (31), an output end of the slow motor (33) is fixedly connected to the top end of the driving gear (34), the outer sides of the driving gear (34) and the driven gear (36) are meshed with the inner side of the movable belt (35), and the top of the mounting block (37) is fixedly connected to the bottom of the movable belt (35). The movable plate (39) is connected to the steering wheel (310), and the bottom of the mounting block (37) is fixedly connected to the top of the movable plate (39); a cavity (312) is opened on one side of the movable plate (39), and a plurality of springs (313) are evenly arranged inside the cavity (312); one side of the wiping plate (310) is fixedly connected to one end of the spring (313), and a wiping cloth (311) is bonded to the other side of the wiping plate (310); the angle adjustment device (2) comprises a mounting plate (21), a steering motor 1 (23), a rotating arm (24), a steering motor 2 (25), a movable arm (26) and a steering motor 3 (27); one end of the movable arm (26) is fixedly mounted to one end of the steering motor 3 (27), and the output end of the steering motor 3 (27) is fixedly mounted to one end of the protective shell (31).

2. A high-sensitivity infrared matrix sensor according to claim 1, characterized in that: The top end of the driven gear (36) is fixedly mounted to the top end of the protective shell (31), and limiting grooves (315) are symmetrically provided at both ends of the movable plate (39).

3. A high-sensitivity infrared matrix sensor according to claim 2, characterized in that: The two ends of the wiping plate (310) are symmetrically fixedly connected to the limiting protrusions (314), and one end of the limiting protrusions (314) is slidably mounted on the inner side of the limiting groove (315).

4. A high-sensitivity infrared matrix sensor according to claim 3, characterized in that: One end of the second steering motor (25) is fixedly mounted on one end of the rotating arm (24), and the output end of the second steering motor (25) is fixedly connected to one end of the movable arm (26).

5. A high-sensitivity infrared matrix sensor according to claim 4, characterized in that: The output end of the steering motor (23) is fixedly connected to the bottom end of the rotating arm (24), and a mounting seat (22) is fixedly mounted on the bottom end of the steering motor (23), and the bottom end of the mounting seat (22) is welded to the top of the mounting plate (21).

6. A high-sensitivity infrared matrix sensor according to claim 5, characterized in that: It also includes a power supply module (4), an image recognition module (5), an infrared emission module (6), an infrared detection module (7), an auxiliary control module (8), an industrial computer module (9), a control module (10), an audio and visual prompt module (11), a normally open control module (12), a terminal module (13) and a storage module (14); The power supply module (4) is used to supply power to the camera of the image recognition module (5) and the infrared matrix transmitter of the infrared transmission module (6); The image recognition module (5) realizes face recognition and moving target camera functions through a camera. When a moving target appears within the infrared threshold range, the camera takes a real-time photo and recognizes the face, and then transmits the shooting and recognition results to the terminal module (13) and the storage module (14); The infrared emission module (6) emits an infrared beam at an emission angle a through an infrared matrix emitter, and when the infrared beam encounters a human body or an object, the infrared beam is reflected; After the infrared detection module (7) receives and detects the reflected light beam through the infrared detector, it converts the infrared reflected echo signal into a target distance signal, obtains array acquisition data and an offset distance b, transmits the target distance signal to the industrial computer module (9), calculates the distance c between the infrared matrix transmitter and the moving target using a triangular geometric relationship, and performs classification processing on the array acquisition data; The auxiliary control module (8) receives the signal through the touch sensor and converts it into an electrical signal, and then transmits the electrical signal to the industrial computer module (9); The industrial computer module (9) exchanges data with the control module (10) and the sound and light prompt module (11) through asynchronous serial port communication, receives signals from the infrared detection module (7) and the auxiliary control module (8), completes the tasks of issuing control instructions, setting parameters, sound and light control and state acquisition, and sets the sensing threshold of the infrared detection module (7); The control module (10) is used to start the gate driving mechanism after receiving the control instruction of the industrial computer module (9) to automatically open the gate; The sound and light prompt module (11) is used to turn on the sound and light prompt after receiving a control instruction from the industrial computer module (9); The normally open control module (12) inputs an emergency signal to the industrial computer module (9) through the controller, and the control module (10) controls the gate to be normally open using a dry contact method after receiving the emergency signal from the industrial computer; The terminal module (13) is used to receive the shooting and recognition information of the image recognition module (5), and simultaneously receive the classification result information of the classification module (73); The storage module (14) is used to store the shooting and recognition information and the classification result information.

7. A high-sensitivity infrared matrix sensor according to claim 6, characterized in that: The infrared detection module (7) comprises a reflection signal processing module (71), a feature extraction module (72) and a classification module (73); The reflection signal processing module (71) uses a K-means algorithm to perform clustering preprocessing on the array collected data, separates the moving target signal from the background noise, obtains data that conforms to the target motion range, and transmits the data to the feature extraction module (72); The feature extraction module (72) uses a least squares fitting method to extract feature information that can characterize the moving distance and direction of the moving target; The classification module (73) uses a KNN classifier to identify and classify the moving direction of the moving target, and transmits the identification and classification results to the terminal module (13) and the storage module (14).

8. A high-sensitivity infrared matrix sensor according to claim 7, characterized in that: When the KNN classifier performs recognition and classification, it takes the feature information as the test sample x and takes the n nearest neighbors of the test sample x. When most of the K nearest neighbors belong to one category, x belongs to the category, including the following steps: S1. Assume that among the d samples of feature information, there are d1 samples from class e1, d2 samples from class e2, and d3 samples from class e3; S2. If K1, K2, and K3 are the number of samples belonging to the e1, e2, and e3 categories among the K nearest neighbors, the discriminant function can be located as: g i (x) = K i ,i=1,2,...,f; S3. When the decision rule satisfies the following expression When the decision x∈e j , when K=1, it is the nearest neighbor method.

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