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Abstract

The application discloses a detector, which comprises a shell, a light emitting assembly, a light receiving assembly, an alarm device and a passive infrared monitoring module. The passive infrared monitoring module is arranged in the shell and is used for passively receiving first infrared light radiated by an intruder entering a target area. The light emitting assembly and the light receiving assembly are arranged in the shell at intervals. The light emitting assembly is used for emitting second infrared light to an environment outside the detector, and the light receiving assembly is used for receiving the second infrared light. In the case that the passive infrared monitoring module receives the first infrared light, it is confirmed that the intruder enters the target area. In the case that the light receiving assembly receives the second infrared light, it is confirmed that the detector is blocked. The above scheme can solve the problem in the prior art that the passive infrared detector is in a state of monitoring function failure for a long time because the user cannot obtain the information that the passive infrared detector is blocked.

Description

Technical Field

[0001] This invention relates to the field of security equipment technology, and in particular to a detector. Background Technology

[0002] Passive infrared detectors, as a type of monitoring device, are typically installed on walls, door frames, window frames, and other locations to monitor target areas. For example, when an intruder (such as a person or animal) enters the target area, the infrared light radiated by the intruder will enter the passive infrared detector, thereby triggering an alarm.

[0003] In practical applications, if a passive infrared detector is intentionally obstructed, it may lose its monitoring function and be unable to monitor the target area in real time. This prevents users from obtaining information about the obstruction, leaving the detector in a state of prolonged monitoring failure. Therefore, it is necessary to design a passive infrared detector capable of detecting obstructions to avoid this situation where users are unable to obtain information about the obstruction and the detector remains in a state of prolonged monitoring failure. Summary of the Invention

[0004] This invention discloses a detector to solve the problem in related technologies where passive infrared detectors are blocked, causing the detector to remain in a state of monitoring failure for a long time because the user cannot obtain information about the blockage.

[0005] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0006] This application discloses a detector, which includes a housing, a light emitting component, a light receiving component, an alarm device, and a passive infrared monitoring module, wherein:

[0007] The passive infrared monitoring module is disposed in the housing and is used to passively receive the first infrared light radiated by an intruder entering the target area. The light emitting component and the light receiving component are disposed alternately in the housing. The light emitting component is used to emit a second infrared light into the environment outside the detector, and the light receiving component is used to receive the second infrared light.

[0008] When the passive infrared monitoring module receives the first infrared light and confirms that an intruder has entered the target area, the alarm device issues a first alarm message.

[0009] When the light receiving component receives the second infrared light, confirming that the detector is blocked, the alarm device issues a second alarm message.

[0010] Wherein, the wavelength of the first infrared light is within a first wavelength range, and the wavelength of the second infrared light is within a second wavelength range, wherein the first wavelength range is different from the second wavelength range.

[0011] The technical solution adopted in this invention can achieve the following technical effects:

[0012] The detector disclosed in this application, by incorporating a passive infrared monitoring module, a light emitting component, and a light receiving component, enables the passive infrared monitoring module to receive first infrared light radiated by an intruder entering the target area. This confirms the intruder's presence and triggers an alarm, thus achieving the monitoring function of the target area. The light emitting component emits second infrared light into the environment outside the detector. Since the wavelength of the second infrared light emitted by the light emitting component is different from that of the first infrared light, the second infrared light will not trigger the passive infrared monitoring module. Therefore, if the light receiving component does not receive the second infrared light, it indicates that the detector is not obstructed, and the second infrared light emitted by the light emitting component is emitted into the environment outside the detector and will not be received by the light receiving component. If the light receiving component receives the second infrared light, it indicates that an obstruction is blocking the detector. The second infrared light emitted by the light emitting component is reflected between the surface of the obstruction and the detector and received by the light receiving component, thus confirming that the detector is obstructed. This allows the detector to not only monitor the target area but also prevent obstruction, thereby avoiding the situation where the user cannot obtain information about detector obstruction, preventing the detector from being in a state of monitoring failure for an extended period. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the detector structure disclosed in an embodiment of the present invention;

[0014] Figure 2 This is a three-dimensional cross-sectional view of the detector disclosed in an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the second shell portion disclosed in an embodiment of the present invention from a first perspective;

[0016] Figure 4 This is a schematic diagram of the second shell portion disclosed in an embodiment of the present invention from a second perspective;

[0017] Figure 5 This is a cross-sectional view of the second shell portion disclosed in an embodiment of the present invention;

[0018] Figure 6 This is a partial schematic diagram of the detector disclosed in an embodiment of the present invention;

[0019] Figure 7This is a path diagram of the second infrared light disclosed in an embodiment of the present invention, wherein 'a' in the diagram represents an obstruction, and the arrows in the diagram represent the transmission path of the second infrared light;

[0020] Figure 8 This is a schematic diagram of a driving component driving a light receiving component close to a light emitting component, as disclosed in an embodiment of the present invention.

[0021] Figure 9 This is a schematic diagram of a driving component driving a light receiving component away from a light emitting component, as disclosed in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100 - Housing, 110 - Guide groove, 120 - Light-transmitting part, 130 - First housing part, 140 - Second housing part

[0024] 200 - Light emitting component, 210 - First substrate, 220 - Light emitting element

[0025] 300-Optical Receiver Component

[0026] 400-Drive assembly, 410-Drive body, 411-Drive component, 412-Gear, 420-Mounting part, 421-Meshing part,

[0027] 500-Light Blocking Section

[0028] 600-optical accessories,

[0029] 700-Passive Infrared Monitoring Module. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0031] The technical solutions disclosed in the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Please refer to Figures 1 to 9 This invention discloses a detector that can be installed on walls, doors, window frames, etc., for monitoring target areas.

[0033] The disclosed detector includes a housing 100, a light emitting component 200, a light receiving component 300, an alarm device, and a passive infrared monitoring module 700.

[0034] A passive infrared monitoring module 700 is disposed in the housing 100 and is used to passively receive the first infrared light emitted by an intruder entering the target area. A light emitting component 200 and a light receiving component 300 are disposed spaced apart in the housing 100. The light emitting component 200 is used to emit a second infrared light into the environment outside the detector, and the light receiving component 300 is used to receive the second infrared light.

[0035] When the passive infrared monitoring module 700 receives the first infrared light, it confirms that an intruder has entered the target area, and the alarm device issues a first alarm message. When the light receiving component 300 receives the second infrared light, it confirms that the detector is blocked, and the alarm device issues a second alarm message. The wavelengths of the first and second infrared lights are within a first wavelength range, and the wavelengths of the second infrared light are within a second wavelength range. The first and second wavelength ranges are different and do not overlap.

[0036] It should be noted that, in the embodiments of this application, "obstruction" refers to an obstruction (such as tape, cloth, etc.) covering the detector, or obstructing the detector at close range (e.g., 1cm, 2cm, etc. from the surface of the detector). Objects at a greater distance from the detector (e.g., greater than 20cm, 30cm from the detector) (e.g., the ground, walls, etc.) are not within the scope of the obstruction mentioned in this application.

[0037] When the detector is not blocked by any nearby obstruction, the second infrared light emitted by the light emitting component 200 into the environment outside the detector will not be directly projected onto the light receiving component 300. Furthermore, when the second infrared light is reflected by an object at a greater distance and enters the light receiving component 300, the energy attenuation of the reflected light is significant, therefore the detector will not recognize it as obstruction. Intruders can refer to humans or animals, etc. Users can set the wavelength range of the second infrared light that the passive infrared monitoring module 700 can receive according to actual needs, thereby enabling the monitoring of intruders that actually require detection. Alarm information can include audible alerts, text alerts, and indicator light color alerts.

[0038] The detector disclosed in this application, by configuring a passive infrared monitoring module 700, a light emitting component 200, and a light receiving component 300, enables the passive infrared monitoring module 700 to receive the first infrared light radiated by the intruder when it enters the target area. This confirms the intruder's presence and triggers an alarm, thus achieving the monitoring function of the target area. The light emitting component 200 emits a second infrared light into the environment outside the detector. Since the wavelength of the second infrared light emitted by the light emitting component 200 is different from that of the first infrared light, the second infrared light will not trigger the passive infrared monitoring module 700. If the light receiving component 300 does not receive the second infrared light, it indicates that the detector is not obstructed. If the light receiving component 300 receives the second infrared light, it indicates that the second infrared light emitted by the light emitting component 200 may be reflected between the obstruction and the surface of the detector or reflected inside the light-transmitting part 120 on the surface of the detector and received by the light receiving component 300. This confirms that the detector is obstructed, thus enabling the detector to not only monitor the target area but also prevent obstruction. This avoids the situation where the detector is in a state of monitoring failure for a long time because the user cannot obtain information that the detector is obstructed.

[0039] To avoid interference from the second infrared light emitted by the light emitting component 200 on the monitoring of the passive infrared monitoring module 700, optionally, the receiving end of the passive infrared monitoring module 700 and the emitting end of the light emitting component 200 can both be located on the same side of the housing 100. The orientation of the receiving end of the passive infrared monitoring module 700 can be tilted relative to the orientation of the emitting end of the light emitting component 200, and tilted along the side away from the emitting end of the light emitting component 200.

[0040] The detector disclosed in this application sets the orientation of the receiving end of the passive infrared monitoring module 700 and the emitting end of the light emitting component 200 so that the orientation of the receiving end of the passive infrared monitoring module 700 is tilted relative to the orientation of the emitting end of the light emitting component 200, and tilted along the side away from the emitting end of the light emitting component. This ensures that the receiving range of the passive infrared monitoring module 700 and the emitting range of the light emitting component do not overlap, thereby avoiding interference from the second infrared light emitted by the light emitting component 200 to the monitoring of the passive infrared monitoring module 700.

[0041] Specifically, the optical receiving component 300 can be located between the passive infrared monitoring module 700 and the optical emitting component 200, and the orientation of the receiving end of the optical receiving component 300 is the same as the orientation of the emitting end of the optical emitting component 200.

[0042] The detector disclosed in this application embodiment places the light receiving component 300 between the passive infrared monitoring module 700 and the light emitting component 200, thereby creating a larger distance between them. This effectively prevents the second infrared light emitted by the light emitting component 200 from interfering with the monitoring of the passive infrared monitoring module 700. Furthermore, by setting the orientation of the receiving end of the light receiving component 300 to be the same as the orientation of the emitting end of the light emitting component 200, the light receiving component 300 can better receive the second infrared light even when the detector is blocked.

[0043] Of course, in other embodiments, the passive infrared monitoring module 700 can also be disposed on the side of the light emitting component 200 away from the light receiving component 300, and spaced apart from the light receiving component 300. The orientation of the receiving end of the light receiving component 300 and the orientation of the emitting end of the light emitting component 200 can have a certain angle. This application does not impose specific limitations on the placement and orientation angle of the passive infrared monitoring module 700, the light emitting component 200, and the light receiving component 300.

[0044] To prevent interference from the second infrared light and other infrared light emitted by the light emitting component 200 on the monitoring of the passive infrared monitoring module 700, the detector may optionally include a filter element. This filter element can be located at the receiving end of the passive infrared monitoring module 700 to filter out infrared light other than the first infrared light. This prevents interference from the second infrared light and other infrared light emitted by the light emitting component 200 on the monitoring of the passive infrared monitoring module 700.

[0045] In specific application scenarios, the detector may only need to monitor moving intruders. To adapt to this scenario, the detector may optionally include a microwave detection device, which can be located in the housing 100. The microwave detection device is used to emit microwave signals to the target area and receive the microwave signals reflected by the intruder to detect whether the intruder is in motion. When the passive infrared monitoring module 700 receives the first infrared light and the microwave detection device detects that the intruder is in motion, it can be confirmed that an intruder has entered the target area, and the alarm device can issue a first alarm message.

[0046] It should be noted that the technology and principle of microwave detection devices for detecting whether an intruder is in motion are existing technologies, and will not be described in detail in the embodiments of this application.

[0047] The detector disclosed in this application embodiment is equipped with a microwave detection device, so that when the passive infrared monitoring module 700 receives the first infrared light and the microwave detection device detects that the intruder is in motion, it confirms that an intruder has entered the target area, and the alarm device issues the first alarm information. This can be adapted to application scenarios where the detector may only need to detect moving intruders.

[0048] Since detectors are typically used to monitor the human body, and the wavelength range of infrared light emitted by the human body is between 8000nm and 14000nm, the first wavelength range can be 8000nm-14000nm. To avoid interference from the second infrared light emitted by the light emitting component to the passive infrared monitoring module 700, the second wavelength range can be 900nm-1000nm.

[0049] In some cases, for example, the alarm device issues a second alarm message indicating that an obstruction is blocking the detector, but the obstruction may only cover a portion of the detector and not the passive infrared monitoring module 700. In such cases, the detector's intrusion detection function remains operational, and the user can handle it during downtime. Therefore, it is necessary to provide a structure capable of detecting the extent of obstruction. Optionally, to detect the obstruction's range, the detector may also include a drive assembly 400. The drive assembly 400 may be located in the housing 100 and connected to the light receiving assembly 300, used to drive the light receiving assembly 300 closer to or further away from the light emitting assembly 200.

[0050] It should be noted that when the light receiving component 300 receives the second infrared light near the light emitting component 200, it can be determined that the detector is blocked. In this case, the driving component 400 can drive the light receiving component 300 away from the light emitting component 200. If the light receiving component 300 receives the second infrared light away from the light emitting component 200, it can be determined that the size of the obstruction is large and may block the passive infrared monitoring module 700. If the light receiving component 300 does not receive the second infrared light away from the light emitting component 200, it can be determined that the size of the obstruction is small and does not block the passive infrared monitoring module 700. Of course, driving the light receiving component 300 to move closer to or away from the light emitting component 200 to detect whether the passive infrared monitoring module 700 is blocked is only one application, and this application does not limit the specific application scenarios of driving the light receiving component 300 to move closer to or away from the light emitting component 200.

[0051] Because the second infrared light emitted by the light emitting component 200 into the environment outside the detector is reflected by the obstruction and the surface of the detector or the light-transmitting part 120 of the detector surface, until the second infrared light is reflected to the receiving end of the light receiving component 300, the light receiving component 300 receives the second infrared light. Therefore, the intensity of the second infrared light received by the light receiving component 300 is greater when it is closer to the light emitting component 200, and the intensity of the second infrared light received by the light receiving component 300 is smaller when it is farther away from the light emitting component 200. Therefore, the light receiving component 300 can be positioned closer to the light emitting component 200 in its initial state, so that when the light receiving component 300 receives the second infrared light, it can more accurately determine whether the detector is obstructed.

[0052] Specifically, the driving assembly 400 may include a driving body 410 and a mounting portion 420. The driving body 410 may be connected to the mounting portion 420, and the light receiving assembly 300 may be disposed on the mounting portion 420. The mounting portion 420 may have a first guide portion, and the housing 100 may have a second guide portion (e.g., ...). Figure 6 As shown, the second guide portion can be provided in the first housing portion 130), and the first guide portion can be guided and cooperated with the second guide portion. The drive body 410 can be used to drive the mounting portion 420 to move the light receiving component 300 closer to or away from the light emitting component 200 under the guidance and cooperation of the first guide portion and the second guide portion.

[0053] The detector disclosed in this application configures the driving assembly 400 as including a driving body 410 and a mounting part 420. This allows the mounting part 420 to provide a mounting base for the light receiving assembly 300, enabling the driving body 410 to move via the mounting part 420 to move the light receiving assembly 300 closer to or away from the light emitting assembly 200. This avoids direct connection between the driving body 410 and the light receiving assembly 300, thus improving the stability of the light receiving assembly 300's installation. By providing a first guide portion in the mounting part 420 and a second guide portion in the housing 100, when the driving body 410 drives the mounting part 420 to move the light receiving assembly 300 closer to or away from the light emitting assembly 200, the first guide portion can cooperate with the second guide portion for guidance, resulting in a more accurate movement path for the light receiving assembly 300 driven by the mounting part 420.

[0054] In this embodiment, the drive body 410 may be a hydraulic drive mechanism, a pneumatic drive mechanism, a drive motor, a shape memory alloy, etc. This embodiment does not impose specific restrictions on the type of drive body 410.

[0055] Specifically, one of the first guide portion and the second guide portion can be a guide protrusion, and the other can be a guide groove 110. The guide protrusion is slidably disposed within the guide groove 110. The detector disclosed in this application simplifies the structure of the first guide portion and the second guide portion by setting one of the first guide portion and the second guide portion as a guide protrusion and the other as a guide groove 110.

[0056] In one optional embodiment, the drive body 410 may include a drive member 411 and a gear 412, with the drive member 411 connected to the gear 412. The mounting portion 420 may have a meshing portion 421 that engages with the external teeth of the gear 412. The drive member 411 may be used to drive the gear 412 to rotate, so that the gear 412, with the engagement of its external teeth and the meshing portion 421, drives the mounting portion 420 to move the light receiving assembly 300 closer to or away from the light emitting assembly 200.

[0057] The detector disclosed in this application embodiment is configured such that the drive body 410 includes a drive member 411 and a gear 412, and the mounting part 420 is configured to have a meshing part 421 that meshes with the external teeth of the gear 412. This allows the drive member 411 to drive the gear 412 to rotate, so that the gear 412, under the cooperation of the external teeth and the meshing part 421, drives the mounting part 420 to move the light receiving component 300 closer to or away from the light emitting component 200, thereby making the movement of the light receiving component 300 more stable.

[0058] To protect the light emitting component 200 and the light receiving component 300, the housing 100 may optionally have an accommodating cavity in which the light emitting component 200, the light receiving component 300, and the passive infrared monitoring module 700 are all disposed. The housing 100 may include a light-transmitting portion 120, and the emitting end of the light emitting component 200, the receiving end of the light receiving component 300, and the receiving end of the passive infrared monitoring module 700 may all face the light-transmitting portion.

[0059] The detector disclosed in this application embodiment houses the light emitting component 200, the light receiving component 300, and the passive infrared monitoring module 700 within the accommodating cavity of the housing 100. This allows the housing 100 to protect the light emitting component 200, the light receiving component 300, and the passive infrared monitoring module 700. By providing a light-transmitting part 120 on the housing 100, the emitting end of the light emitting component 200, the receiving end of the light receiving component 300, and the receiving end of the passive infrared monitoring module 700 can all face the light-transmitting part 120, thereby providing a channel for the light emitting component 200 to emit second infrared light, the light receiving component 300 to receive second infrared light, and the passive infrared monitoring module 700 to receive first infrared light.

[0060] To facilitate detector maintenance, the housing 100 may optionally include a first housing portion 130 and a second housing portion 140, which are detachably connected. The first housing portion 130 and the second housing portion 140 form an accommodating cavity, and the light-transmitting portion 120 is located in the second housing portion 140.

[0061] The detector disclosed in this application provides a housing 100 by configuring the housing 100 as a first housing portion 130 and a second housing portion 140 that can be detachably connected, thereby facilitating the disassembly of the housing 100 and thus enabling the maintenance of the light emitting component 200 and the light receiving component 300 located within the receiving cavity.

[0062] To prevent the second infrared light emitted by the light emitting component 200 from being directly transmitted from the inside of the detector to the light receiving component 300, causing the detector to mistakenly believe that it is blocked by an obstruction, the detector may optionally include a light blocking part 500. The light blocking part 500 may be disposed in the housing 100 and may be used to block the second infrared light emitted by the light emitting component 200 from reaching the light receiving component 300 from the inside of the detector.

[0063] The detector disclosed in this application embodiment has a light-blocking part 500, which can block the second infrared light emitted by the light emitting component 200 from reaching the light receiving component 300 from the inside of the detector. This can prevent the second infrared light emitted by the light emitting component 200 from being directly transmitted from the inside of the detector to the light receiving component 300, thus preventing the detector from mistakenly thinking that it is blocked by an obstruction.

[0064] Specifically, the light emitting component 200 may include a first substrate 210 and a light-emitting element 220. The first substrate 210 may be disposed on the first housing portion 130, and the light-emitting element 220 may be disposed on the first substrate 210. The light-blocking portion 500 may include an elastic light-blocking sleeve, which may be disposed on the second housing portion 140. When the first housing portion 130 and the second housing portion 140 are connected, the elastic light-blocking sleeve may be fitted onto the light-emitting element 220, and the first port of the elastic light-blocking sleeve may elastically contact the first substrate 210. The second port of the elastic light-blocking sleeve may be the exit end of the second infrared light, and the second port of the elastic light-blocking sleeve may elastically contact the light-transmitting portion 120 or extend beyond the second housing portion 140.

[0065] The detector disclosed in this application embodiment is configured with a light-blocking part 500 including an elastic light-blocking sleeve, such that the elastic light-blocking sleeve is disposed on the second shell part 140. This allows the second shell part 140 to drive the elastic light-blocking sleeve to be disposed on the light-emitting element 220 when the first shell part 130 is connected to the second shell part 140. The first port of the elastic light-blocking sleeve is in elastic contact with the first substrate 210, thereby allowing for a better seal at the connection between the elastic light-blocking sleeve and the first substrate 210. This, in turn, better prevents the second infrared light emitted by the light emitting component 200 from being directly transmitted from the inside of the detector to the light receiving component 300.

[0066] Of course, the light-blocking part 500 can also be other structures, such as light-blocking ribs provided on the housing 100. The embodiments of this application do not limit the specific structure of the light-blocking part 500.

[0067] For better light distribution, the detector may optionally include a light distribution element 600, which may be disposed in the second housing 140. The light distribution element 600 is located inside the elastic light blocking sleeve. When the first housing 130 and the second housing 140 are connected, the light distribution element 600 may be opposite to the light emitting element 220.

[0068] The detector disclosed in this application embodiment uses a light distribution element 600, which is positioned opposite to the light-emitting element 220, to distribute the second infrared light emitted by the light-emitting element 220. By placing the light distribution element 600 within the second housing 140 and the elastic light-blocking sleeve, the elastic light-blocking sleeve provides installation space for the light distribution element 600 and also protects it.

[0069] The above embodiments of the present invention focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0070] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A detector, characterized in that, Includes a housing (100), a light emitting component (200), a light receiving component (300), an alarm device, and a passive infrared monitoring module (700), wherein: The passive infrared monitoring module (700) is disposed in the housing (100) and is used to passively receive the first infrared light radiated by an intruder entering the target area. The light emitting component (200) and the light receiving component (300) are disposed at intervals in the housing (100). The light emitting component (200) is used to emit a second infrared light into the environment outside the detector, and the light receiving component (300) is used to receive the second infrared light. When the passive infrared monitoring module (700) receives the first infrared light, it confirms that an intruder has entered the target area, and the alarm device issues a first alarm message. When the light receiving component (300) receives the second infrared light, it confirms that the detector is blocked, and the alarm device issues a second alarm message. Wherein, the wavelength of the first infrared light is within a first wavelength range, the wavelength of the second infrared light is within a second wavelength range, and the first wavelength range is different from the second wavelength range; The detector also includes a driving component (400), which is disposed in the housing (100) and connected to the light receiving component (300) for driving the light receiving component (300) to move closer to or away from the light emitting component (200).

2. The detector according to claim 1, characterized in that, The receiving end of the passive infrared monitoring module (700) and the emitting end of the light emitting component (200) are both located on the same side of the housing (100). The orientation of the receiving end of the passive infrared monitoring module (700) is inclined relative to the orientation of the emitting end of the light emitting component (200), and is inclined along the side away from the emitting end of the light emitting component (200).

3. The detector according to claim 2, characterized in that, The optical receiving component (300) is located between the passive infrared monitoring module (700) and the optical emitting component (200), and the orientation of the receiving end of the optical receiving component (300) is the same as the orientation of the emitting end of the optical emitting component (200).

4. The detector according to claim 1, characterized in that, The detector also includes a filter element, which is disposed at the receiving end of the passive infrared monitoring module (700) and is used to filter out other infrared light besides the first infrared light.

5. The detector according to claim 1, characterized in that, The detector also includes a microwave detection device, which is disposed in the housing (100) and is used to transmit microwave signals to the target area and receive the microwave signals reflected by the intruder to detect whether the intruder is in motion. When the passive infrared monitoring module (700) receives the first infrared light and the microwave detection device detects that the intruder is in motion, it confirms that an intruder has entered the target area, and the alarm device issues a first alarm message.

6. The detector according to claim 1, characterized in that, The first wavelength range is 8000nm-14000nm, and the second wavelength range is 900nm-1000nm.

7. The detector according to claim 1, characterized in that, The driving assembly (400) includes a driving body (410) and a mounting part (420). The driving body (410) is connected to the mounting part (420). The light receiving assembly (300) is disposed on the mounting part (420). The mounting part (420) has a first guide part, and the housing (100) has a second guide part. The first guide part and the second guide part are guided and cooperated. The driving body (410) is used to drive the mounting part (420) to move the light receiving assembly (300) closer to or away from the light emitting assembly (200) under the guided cooperation of the first guide part and the second guide part.

8. The detector according to claim 7, characterized in that, One of the first guide portion and the second guide portion is a guide protrusion, and the other is a guide groove (110). The guide protrusion is slidably disposed in the guide groove (110).

9. The detector according to claim 7, characterized in that, The drive body (410) includes a drive member (411) and a gear (412). The drive member (411) is connected to the gear (412). The mounting part (420) has a meshing part (421) that meshes with the external teeth of the gear (412). The drive member (411) is used to drive the gear (412) to rotate so that the gear (412) drives the mounting part (420) to move the light receiving component (300) closer to or away from the light emitting component (200) under the cooperation of the external teeth and the meshing part (421).

10. The detector according to claim 1, characterized in that, The housing (100) has an inner cavity, in which the light emitting component (200), the light receiving component (300), and the passive infrared monitoring module (700) are all disposed. The housing (100) includes a light-transmitting part (120), and the emitting end of the light emitting component (200), the receiving end of the light receiving component (300), and the receiving end of the passive infrared monitoring module (700) all face the light-transmitting part (120).

11. The detector according to claim 10, characterized in that, The housing (100) includes a first housing portion (130) and a second housing portion (140), the first housing portion (130) and the second housing portion (140) are detachably connected, the first housing portion (130) and the second housing portion (140) form the receiving cavity, and the light-transmitting portion (120) is located in the second housing portion (140).

12. The detector according to claim 11, characterized in that, The detector also includes a light-blocking part (500), which is disposed in the housing (100). The light-blocking part (500) is used to block the second infrared light emitted by the light emitting component (200) from reaching the light receiving component (300) from the inside of the detector.

13. The detector according to claim 12, characterized in that, The light emitting component (200) includes a first substrate (210) and a light emitting element (220). The first substrate (210) is disposed on the first shell portion (130), and the light emitting element (220) is disposed on the first substrate (210). The light blocking portion (500) includes an elastic light blocking sleeve, and the elastic light blocking sleeve is disposed on the second shell portion (140). When the first shell portion (130) and the second shell portion (140) are connected, the elastic light-blocking sleeve is fitted onto the light-emitting element (220), and the first port of the elastic light-blocking sleeve is in elastic contact with the first substrate (210), and the second port of the elastic light-blocking sleeve is the exit end of the second infrared light.

14. The detector according to claim 13, characterized in that, The detector also includes a light distribution element (600), which is disposed in the second housing (140) and located inside the elastic light-blocking sleeve. When the first housing (130) and the second housing (140) are connected, the light distribution element (600) is opposite to the light-emitting element (220).

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