A Shooter Dangerous Action Alarm Monitoring System

Abstract

The present invention relates to a shooter dangerous action alarm monitoring system, comprising a gun body, wherein the gun body is provided with: a press key; a first sensing area; a second sensing area; a camera mechanism; an acceleration sensor; and a control system, which is used to execute: S1, at the moment when a trainee starts to act, the control system determines that the trainee is in a preparation action stage, and if any signal is missing, the control system determines that the trainee's gun holding posture is unqualified and issues an alarm; S2, after the second sensing signal disappears, the control system determines that the trainee is in an aiming action stage, and if the trainee's action changes beyond a preset range, the control system determines that the trainee's preparation action is unqualified and issues an alarm, and if it is qualified, proceeds to the next step; S3, at the moment when the trainee starts to shoot, the control system determines that the trainee is in a shooting action stage, and if any signal is missing, the control system determines that the trainee's gun holding posture is unqualified and issues an alarm, and if it is qualified, the control system determines that the trainee's action is qualified.

Description

Technical Field

[0001] The invention relates to the field of shooting training, and in particular to an alarm monitoring system for dangerous actions of shooters. Background Art

[0002] Gun shooting is one of the core skills of the police, soldiers, etc. In order to conduct shooting training for relevant personnel, the existing technology can simulate shooting training through images, by projecting the corresponding shooting points. When the trainee shoots, the training laser can project the corresponding laser point in the projection, so that the image simulation shooting system can recognize the trainee's shooting position.

[0003] During the training process, the trainee is prone to incorrect gun-holding posture when aiming the gun, and the gun head may shake or deflect when firing the gun. Therefore, it is necessary to detect the trainee's movements and gun-holding posture, and issue an alarm when the trainee makes dangerous movements. On the one hand, the existing technology does not monitor whether the trainee holds the gun tightly; on the other hand, the structure of the gun is complex, and it is difficult to determine whether the trainee holds the gun tightly through image recognition, etc., especially during the shooting process of the trainee, the trainee needs to make preparation movements (the index finger is not allowed to touch the trigger), aiming movements (the index finger touches the trigger and presses the trigger lightly), shooting movements (the index finger presses the trigger), etc. During this process, it is difficult for the existing technology to monitor whether the trainee's movements are standardized.

[0004] The purpose of the present invention is to design a shooter dangerous action alarm monitoring system in view of the above-mentioned problems in the prior art. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a shooter dangerous action alarm monitoring system, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A shooter dangerous action alarm monitoring system includes a gun body, wherein the gun body includes a handle, a grip ridge, a gun body, a trigger, and a slide; the gun body is provided with:

[0008] A press key, arranged on the grip spine, for sending a press signal when the trainee's thumb touches the press key;

[0009] A first sensing area is provided at a transition position between the gun body and the handle, and is used to send a first sensing signal when the palm of the trainer touches the first sensing area;

[0010] A second sensing area is provided on the gun body at a position corresponding to the upper part of the trigger, and is used to send a second sensing signal when the trainee's index finger touches the second sensing area;

[0011] A camera mechanism, disposed below the trigger, for capturing an image of the trainee's index finger after it touches the trigger;

[0012] An acceleration sensor is used to obtain the trainer's action start time and shooting start time;

[0013] A control system, connected to the push button, the first sensing area, the second sensing area, the camera mechanism, and the acceleration sensor, for performing:

[0014] S1, when the trainee starts to move, the control system determines that the trainee is in the preparation stage, and collects the pressing signal, the first sensing signal, and the second sensing signal. If any signal is missing, the control system determines that the trainee's gun holding posture is unqualified and issues an alarm. If it is qualified, the control system proceeds to the next step;

[0015] S2, after the second sensing signal disappears, the control system determines that the trainee is in the aiming action stage, and the control system analyzes the action change of the trainee's index finger after touching the trigger through the action image. If the trainee's action change exceeds a preset range, the control system determines that the trainee's preparation action is unqualified and issues an alarm. If it is qualified, the control system proceeds to the next step;

[0016] S3, when the trainee starts shooting, the control system determines that the trainee is in the shooting action stage, and collects the pressing signal and the first sensing signal. If any one of the signals is missing, it is determined that the trainee's gun holding posture is unqualified and an alarm is issued. If it is qualified, it is determined that the trainee's action is qualified.

[0017] Furthermore, the push button is arranged obliquely downward, and the push button protrudes from the grip ridge within 0.5 mm.

[0018] Furthermore, the first sensing area and the second sensing area are touch electrodes, and the first sensing area and the second sensing area are arranged at intervals.

[0019] Furthermore, the first sensing area is a quarter-circle structure, and the second sensing area is a dot structure.

[0020] Furthermore, the gun body includes a trigger guard, and the camera mechanism is arranged at a position of the trigger guard corresponding to the lower side of the trigger.

[0021] Furthermore, the control system analyzes the movement change of the trainee's index finger after touching the trigger through the movement image, including:

[0022] Record the first image after a first delay when the second sensing signal disappears, and record the second image after a second delay when the second sensing signal disappears;

[0023] Calculating a first knuckle angle when the trainee touches the trigger according to the first image, and calculating a second knuckle angle when the trainee lightly presses the trigger according to the second image;

[0024] An angle difference between the first finger joint angle and the second finger joint angle is calculated.

[0025] Furthermore, whether the angle difference conforms to the preset angle range is determined based on whether the movement change of the trainee conforms to the preset movement range.

[0026] Furthermore, the preset angle difference range is 3-5°

[0027] Further, calculating the first finger joint angle when the trainee touches the trigger according to the first image, or calculating the second finger joint angle when the trainee lightly presses the trigger according to the second image, includes:

[0028] Perform shape analysis on the image to obtain the edge image of the knuckle;

[0029] A straight line is extracted from the edge image of the finger joint, and the angle of the extracted straight line is used as the finger joint angle.

[0030] Furthermore, in extracting straight lines from the edge image of the finger joint, the following steps are performed: screening straight lines with angles between 165° and 175°.

[0031] Therefore, the present invention provides the following effects and / or advantages:

[0032] The present application respectively arranges a press key, a first sensing area, a second sensing area, and a camera mechanism at corresponding positions of the gun, and analyzes whether all actions of the trainee's shooting process meet the requirements through the corresponding signal appearance time point and the change of the trainee's finger joint angle obtained by analyzing the corresponding image, thereby preventing the trainee from making dangerous actions such as loosely holding the gun or incorrectly holding the gun.

[0033] The present application determines whether the trainee has sufficient grip on the gun by pressing a key and the first sensing area, determines whether the trainee's action is correct by the time points of appearance and disappearance of the signal corresponding to the second sensing area, and combines the action changes obtained by analyzing the image acquired by the camera mechanism to comprehensively determine whether the trainee has made a dangerous action.

[0034] The present application obtains the edge image of the finger joint by performing shape analysis on the image, and then extracts straight lines from the edge image of the finger joint, and uses the angle of the extracted straight lines as the angle of the finger joint. Thus, the angle change of the trainee's finger joint can be obtained from the image, providing a data basis for the determination of dangerous actions.

[0035] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0036] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0038] Figure 2 is a schematic diagram of a first image and a second image.

[0039] Figure 3 For Figure 2 Schematic diagram after edge detection.

[0040] Figure 4 For Figure 3 Schematic diagram after extracting the straight line, and schematic diagram of the angle between the first joint and the second joint of the finger.

[0041] Figure 5 This is a schematic diagram of the mask.

[0042] Figure 6 To pass Figure 5 The mask shown is a schematic diagram after exposing the first image. DETAILED DESCRIPTION

[0043] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0044] refer to Figure 1 , a shooter dangerous action alarm monitoring system, characterized in that: it includes a gun body, the gun body includes a handle 1, a grip ridge 2, a gun body 3, a trigger 4, and a slide 5; the gun body is provided with:

[0045] A pressing key 6 is arranged on the grip spine and is used to send a pressing signal when the trainee's tiger's mouth touches the pressing key 6;

[0046] In this embodiment, the pressing key 6 is correspondingly arranged at the grip spine 2. When the trainee tightly grasps the handle 1, the trainee's tiger's mouth is blocked at the grip spine 2 and squeezes toward the inside of the grip spine 2, thereby triggering the pressing key 6. When the pressing key 6 is pressed, a pressing signal is emitted, indicating that the trainee's tiger's mouth is tightly attached to the grip spine 2.

[0047] A first sensing area 7 is provided at a transitional position between the gun body 5 and the handle 1, and is used to send a first sensing signal when the palm of the trainer touches the first sensing area 7;

[0048] A second sensing area 8 is provided on the gun body 5 at a position corresponding to the upper part of the trigger 4, and is used to send a second sensing signal when the trainee's index finger touches the second sensing area 8;

[0049] The first sensing area 7 can sense whether the corresponding position of the trainee's palm touches the corresponding position. It is mentioned above that when the press key 6 is pressed, the trainee's tiger's mouth is tightly against the grip ridge 2. At this time, the trainee has tightly grasped the handle 1. Next, it is sensed by the first sensing area 7, which means that the trainee not only tightly grasps the handle 1, but also holds the hand posture correctly. When the grip is correct, the corresponding position of the trainee's hand will touch the corresponding sensing area, thereby obtaining the corresponding sensing signal.

[0050] At the same time, the second sensing area 8 is set at the position above the gun body 5 corresponding to the trigger 4. When the trainee performs actions other than shooting, the trainee's index finger cannot touch the trigger 4 to prevent the trainee from accidentally triggering the trigger 4 and causing dangerous actions. Therefore, the trainee's index finger should rest on the gun body 5 at this time without touching the trigger 4.

[0051] Preferably, the second sensing area 8 is disposed at a position of the gun body 5 corresponding to below the slide 5 , which can prevent the slide 5 from scratching the trainee's fingers when the slide 5 moves.

[0052] A camera mechanism 9 is disposed below the trigger 4 and is used to capture an action image of the trainee's index finger after it touches the trigger 4;

[0053] Preferably, the camera mechanism 9 uses a camera with macro and wide-angle performance. This is because the space below the trigger 4 is limited, and a camera with such performance can capture clearer images with a wider range.

[0054] An acceleration sensor (not shown) is used to obtain the trainer's action start time and shooting start time;

[0055] When the trainer starts training, the trainer will hold the gun horizontally and push it forward from the trainer's chest, so that the trainer can hold the gun horizontally with the watch straight. The action start time is determined when the acceleration sensor detects the horizontal acceleration. After the action start time, when the gun returns to a horizontal state and does not move, it is determined as the shooting start time.

[0056] A control system, connected to the push button 6, the first sensing area 7, the second sensing area 8, the camera mechanism 9, and the acceleration sensor, is used to perform:

[0057] S1, when the trainee starts to move, the control system determines that the trainee is in the preparation stage, and collects the pressing signal, the first sensing signal, and the second sensing signal. If any signal is missing, the control system determines that the trainee's gun holding posture is unqualified and issues an alarm. If it is qualified, the control system proceeds to the next step;

[0058] In this step, when the trainee tightly grasps the gun, the pressing signal and the first sensing signal are generated, and when the trainee's index finger rests on the gun body 5, the second sensing signal is generated. Therefore, at the beginning of the trainee's action, all of the three signals must be detected to determine that the trainee's action at this stage is qualified and no dangerous action alarm is triggered.

[0059] S2, after the second sensing signal disappears, the control system determines that the trainee is in the aiming action stage, and the control system analyzes the action change of the trainee's index finger after touching the trigger 4 through the action image. If the trainee's action change exceeds a preset range, the control system determines that the trainee's preparation action is unqualified and issues an alarm. If it is qualified, the control system proceeds to the next step;

[0060] In this step, when the second signal disappears, it means that the trainee's index finger has left the second sensing area 8, and the trainee will lightly touch the trigger 4 with his index finger, thus starting the aiming action stage. Through image analysis, the trainee's action changes can be judged. If the action changes too much, it may be that the trainee has applied too much pressure on the trigger 4 after lightly touching the trigger 4. In this state, it is easy to accidentally touch the trigger 4 and thus trigger the trigger 4. If the action changes too little, the trainee may have touched the trigger 4 with too little force. At this time, the force required by the trainee from the preparation stage to the trigger 4 stage is too great, and the trainee's hand is prone to shaking, etc., resulting in dangerous actions such as shooting deviation from the predetermined direction.

[0061] S3, when the trainee starts shooting, the control system determines that the trainee is in the shooting action stage, and collects the pressing signal and the first sensing signal. If any one of the signals is missing, it is determined that the trainee's gun holding posture is unqualified and an alarm is issued. If it is qualified, it is determined that the trainee's action is qualified.

[0062] After the shooting starts, the trainee needs to continue to hold the handle 1 tightly to prevent the gun from shaking, deviating from the far direction, and preventing the recoil of the gun from pushing the trainee's arm and causing injury, etc. Therefore, only by continuously collecting the pressing signal and the first sensing signal during this process can it be determined that the trainee's gun holding posture at the start of shooting is correct.

[0063] Furthermore, the push button 6 is arranged obliquely downward, and the push button 6 protrudes within 20.5 cm of the grip ridge.

[0064] In this embodiment, the pressing key 6 is arranged obliquely downward, and the trainee's thumb and forefinger's mouth need to be close to the gun, and the thumb and forefinger's mouth need to be slightly upward, and the thumb and forefinger's mouth needs to fill the concave space of the grip ridge 2, so that the pressing key 6 can be pressed. The pressing key 6 protrudes from the grip ridge 20.5mm to prevent the thumb and forefinger's mouth from lightly touching the gun to generate a pressing signal.

[0065] Furthermore, the first sensing area 7 and the second sensing area 8 are touch electrodes, and the first sensing area 7 and the second sensing area 8 are arranged at intervals.

[0066] Furthermore, the first sensing area 7 is a quarter-circle structure, and the second sensing area 8 is a dot structure.

[0067] In this embodiment, the touch electrode is a direct product of the prior art, which can be a thin sheet structure, attached or embedded in the corresponding position of the gun. Preferably, the first sensing area 7 is a quarter-circular structure composed of multiple arc-shaped partitions, and the multiple arc-shaped partitions are arranged at intervals. Only when the palm tightly grasps the handle 1, the multiple arc-shaped partitions are triggered to send out the first sensing signal, thereby better judging that the trainee is holding the handle 1 tightly.

[0068] Furthermore, the gun body includes a trigger 4 guard, and the camera mechanism 9 is arranged at a position of the trigger 4 guard corresponding to the lower side of the trigger 4.

[0069] In this embodiment, an opening slot is provided at the bottom of the trigger guard 4 , and the camera mechanism 9 is disposed at the bottom of the trigger guard 4 and shoots upward through the opening slot to obtain a corresponding image.

[0070] Furthermore, the control system analyzes the movement changes of the trainee's index finger after touching the trigger 4 through the movement image, including:

[0071] Record the first image after a first delay when the second sensing signal disappears, and record the second image after a second delay when the second sensing signal disappears;

[0072] In this embodiment, after the second sensing signal disappears, it means that the trainee's index finger leaves the second sensing area 8, and after the first delay, it means that the trainee's index finger begins to touch the trigger 4. At this time, the trigger 4 is lightly pressed, and the trigger 4 cannot move freely, but the trigger 4 has not been pressed to the critical point of excitation by the trainee. At this time, the first image is recorded, which can be used as an image of the trainee lightly touching the trigger 4. Next, the trainee should lightly press the trigger 4 so that the trigger 4 reaches the critical point of excitation. At this time, the second image recorded is an image of the trainee lightly pressing the trigger 4. Among them, the first time and the second time can be adjusted according to the training maturity of the trainee. For example, the first time and the second time of a beginner can be set to about 0.5s or longer, and the first time and the second time of an experienced person can be set to about 0.2s or shorter, which is not limited here.

[0073] The change in angle of the trainer's knuckles in the first image and the second image can be used to evaluate whether the trainer has made any dangerous actions. If the trainer touches the trigger 4 lightly or presses the trigger 4 too loosely, the angle between the knuckles and the gun body 5 becomes smaller. If the trainer touches the trigger 4 lightly or presses the trigger 4 too tightly, the angle between the knuckles and the gun body 5 becomes larger. By analyzing this change, it can be used to evaluate whether the trainer's actions are standard.

[0074] In this embodiment, the first image can be Figure 2 As shown in the left sub-figure of , the second image can be Figure 2 As shown in the right sub-figure of .

[0075] Calculating a first finger joint angle when the trainee touches the trigger 4 according to the first image, and calculating a second finger joint angle when the trainee lightly presses the trigger 4 according to the second image;

[0076] An angle difference between the first finger joint angle and the second finger joint angle is calculated.

[0077] Furthermore, whether the angle difference conforms to the preset angle range is determined based on whether the movement change of the trainee conforms to the preset movement range.

[0078] Furthermore, the preset angle difference range is 3-5°

[0079] In this embodiment, the relationship between the angle change of the finger joints and whether the trainee's gun holding posture is correct or not is introduced above. If the pre-angle difference is greater than 5°, it means that the trainee's index finger presses the trigger 4 too lightly at the starting point of the aiming action stage, or the trainee presses the trigger 4 too heavily at the end point of the aiming action stage. If the pre-angle difference is less than 3°, it means that the trainee's index finger presses the trigger 4 too heavily at the starting point of the aiming action stage, or the trainee presses the trigger 4 too lightly at the end point of the aiming action stage. In this case, the trigger 4 may be accidentally triggered, or the gun may shake violently due to the recoil after the trigger 4 is triggered, and other dangerous actions may occur.

[0080] Further, calculating the first finger joint angle when the trainee touches the trigger 4 according to the first image, or calculating the second finger joint angle when the trainee lightly presses the trigger 4 according to the second image, includes:

[0081] Perform shape analysis on the image to obtain the edge image of the knuckle;

[0082] Edge images such as Figure 3 As shown, shape analysis can be performed using the Canny algorithm, which is a direct adoption of the prior art.

[0083] A straight line is extracted from the edge image of the finger joint, and the angle of the extracted straight line is used as the finger joint angle.

[0084] Then, the straight line can be extracted by the Hough transform straight line detection algorithm. Figure 3 By calculating the angle between two straight lines, the joint angle can be obtained.

[0085] Preferably, a mask can be added to the first image and the second image to cover the area other than the back of the finger through the mask to expose the back of the finger. Since the back of the finger is closer to a straight line, the area of ​​the back of the finger is retained for subsequent edge image calculation to reduce interference edges obtained after edge image calculation of other images. Figure 5 , the first image after masking can be referred to Figure 6 .

[0086] In this embodiment, the first finger joint angle when the trainee touches the trigger 4 is calculated to be 170° according to the first image, or the second finger joint angle when the trainee lightly presses the trigger 4 is calculated to be 173° according to the second image. The angle difference between the two is 3°, which falls within the preset angle difference range of 3-5°, indicating that the trainee's aiming action is qualified.

[0087] Furthermore, in extracting straight lines from the edge image of the finger joint, the following steps are performed: screening straight lines with angles between 165° and 175°.

[0088] Since many straight lines may be obtained after edge image calculation, in order to eliminate interference, this embodiment obtains images of multiple people with different weights, heights, and hand shapes in the correct gun holding posture, analyzes them and concludes that the straight line with an angle of 165 to 175° for the trainee corresponds to the angle between the first joint and the second joint of the index finger of the trainee in the correct gun holding posture, thereby preventing misjudgment of other straight lines.

[0089] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0090] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0091] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A shooter dangerous action alarm monitoring system, characterized by: The gun body comprises a handle, a grip ridge, a gun body, a trigger, and a slide; the gun body is provided with: A press key, arranged on the grip spine, for sending a press signal when the trainee's thumb touches the press key; A first sensing area is provided at a transition position between the gun body and the handle, and is used to send a first sensing signal when the palm of the trainer touches the first sensing area; A second sensing area is provided on the gun body at a position corresponding to the upper part of the trigger, and is used to send a second sensing signal when the trainee's index finger touches the second sensing area; A camera mechanism, disposed below the trigger, for capturing an action image of the trainee's index finger after it touches the trigger; An acceleration sensor is used to obtain the trainer's action start time and shooting start time; A control system, connected to the push button, the first sensing area, the second sensing area, the camera mechanism, and the acceleration sensor, for performing: S1, when the trainee starts to move, the control system determines that the trainee is in the preparation stage, and collects the pressing signal, the first sensing signal, and the second sensing signal. If any signal is missing, the control system determines that the trainee's gun holding posture is unqualified and issues an alarm. If it is qualified, the control system proceeds to the next step; S2, after the second sensing signal disappears, the control system determines that the trainee is in the aiming action stage, and the control system analyzes the action change of the trainee's index finger after touching the trigger through the action image. If the trainee's action change exceeds a preset range, the control system determines that the trainee's preparation action is unqualified and issues an alarm. If it is qualified, the control system proceeds to the next step; S3, when the trainee starts shooting, the control system determines that the trainee is in the shooting action stage, and collects the pressing signal and the first sensing signal. If any one of the signals is missing, it is determined that the trainee's gun holding posture is unqualified and an alarm is issued. If it is qualified, it is determined that the trainee's action is qualified.

2. The shooter dangerous action alarm monitoring system according to claim 1, characterized in that: The push button is arranged obliquely downward, and the push button protrudes from the grip ridge within 0.5 mm.

3. The shooter dangerous action alarm monitoring system according to claim 1, characterized in that: The first sensing area and the second sensing area are touch electrodes, and the first sensing area and the second sensing area are arranged at intervals.

4. A shooter dangerous action alarm monitoring system according to claim 3, characterized in that: The first sensing area is a quarter-circle structure, and the second sensing area is a dot structure.

5. The shooter dangerous action alarm monitoring system according to claim 1, characterized in that: The gun body includes a trigger guard, and the camera mechanism is arranged at a position of the trigger guard corresponding to the lower side of the trigger.

6. The shooter dangerous action alarm monitoring system according to claim 1, characterized in that: The control system analyzes the movement change of the trainee's index finger after touching the trigger through the movement image, including: Record the first image after a first delay when the second sensing signal disappears, and record the second image after a second delay when the second sensing signal disappears; Calculating a first knuckle angle when the trainee touches the trigger according to the first image, and calculating a second knuckle angle when the trainee lightly presses the trigger according to the second image; An angle difference between the first finger joint angle and the second finger joint angle is calculated.

7. The shooter dangerous action alarm monitoring system according to claim 6, characterized in that: Whether the trainee's movement changes are within a preset movement range is determined based on whether the angle difference is within a preset angle range.

8. The shooter dangerous action alarm monitoring system according to claim 7, characterized in that: The preset angle difference range is 3-5°.

9. The shooter dangerous action alarm monitoring system according to claim 6, characterized in that: Calculating a first finger joint angle when a trainee touches the trigger according to the first image, or calculating a second finger joint angle when a trainee lightly presses the trigger according to the second image, includes: Perform shape analysis on the image to obtain the edge image of the knuckle; A straight line is extracted from the edge image of the finger joint, and the angle of the extracted straight line is used as the finger joint angle.

10. The shooter dangerous action alarm monitoring system according to claim 9, characterized in that: Extract straight lines from the edge image of the finger joint and perform: filter straight lines with angles between 165° and 175°.

Images