CN114387749A

CN114387749A - Intrusion detector

Info

Publication number: CN114387749A
Application number: CN202111683229.6A
Authority: CN
Inventors: 徐海东; 徐国斌; 李宣娇
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-22
Also published as: WO2023124598A1

Abstract

Embodiments of the present application provide an intrusion detector. The intrusion detector comprises a shell, a support frame, a detector main body and an anti-shielding assembly. The support frame sets up in the casing, and the support frame includes fixed part and movable part, fixed part and movable part fixed connection, and the movable part can be relatively rotated by the fixed part relatively. The probe body is provided on the movable portion. The anti-blocking assembly includes a transmitter configured to transmit a detection signal for detecting the blocking object, and a receiver configured to receive a reflection signal formed by the detection signal being reflected by the blocking object, both the transmitter and the receiver being disposed on the movable portion. According to intrusion detector in this application embodiment, when the detection visual angle of detector main part changes, prevent sheltering from that the subassembly prevents sheltering from the visual angle and also changes thereupon to, make prevent sheltering from that the subassembly prevents sheltering from the visual angle and detector main part's detection visual angle and can remain the unanimity throughout, intrusion detector in this embodiment has comparatively wide and prevents sheltering from the angle scope.

Description

Intrusion detector

Technical Field

The application relates to the technical field of security and protection, in particular to an intrusion detector.

Background

This section provides background information related to the present application and is not necessarily prior art.

An intrusion detector (also called a motion detector) mainly uses a Passive Infrared detection technology (Passive Infrared), a microwave detection technology or a video technology to detect the entrance of a human body into a defense area. Wherein mainly adopt passive infrared detection technique, utilize the lens unit of front end to collect the human infrared signal in the defence area to with the signal assemble to Pyroelectric infrared sensor (Pyroelectric passive sensor, Pyro for short), Pyro can turn into the signal of telecommunication effect with infrared signal, when human invasion, the human temperature of invasion produces the change with environment background temperature, and the detector senses this change and can send alarm signal promptly.

However, intrusion detectors may fail due to occlusion (e.g., by hard objects, paint or paint applied, etc.), and thus have been provided with anti-occlusion techniques. In the related art, an anti-blocking technology in an intrusion detector generally forms a signal closed loop through a Near Infrared (NIR) transmitter and a NIR receiver, and determines whether the detector is blocked by an object or whether the detector is painted or sprayed by detecting characteristic changes (mainly intensity changes) of the signal. However, in the related art, when the detection viewing angle of the intrusion detector changes, the anti-blocking viewing angle of the anti-blocking assembly cannot cover the detection viewing angle, and the anti-blocking range of the intrusion detector is limited.

Disclosure of Invention

The application aims to provide an intrusion detector so as to enlarge the anti-shielding angle range of the intrusion detector. In order to achieve the above purpose, the present application provides the following technical solutions:

embodiments of the present application provide an intrusion detector. The intrusion detector comprises a shell, a support frame, a detector main body and an anti-shielding assembly. The support frame sets up in the casing, and the support frame includes fixed part and movable part, fixed part and movable part fixed connection, and the movable part can be relatively rotated by the fixed part relatively. The probe body is provided on the movable portion. The anti-blocking assembly includes a transmitter configured to transmit a detection signal for detecting the blocking object, and a receiver configured to receive a reflection signal formed by the detection signal being reflected by the blocking object, both the transmitter and the receiver being disposed on the movable portion.

According to the intrusion detector in the embodiment of the application, the supporting piece is arranged in the shell, the movable part can rotate relative to the fixed part, namely the movable part of the supporting frame is connected with the fixed part in an angle-adjustable mode, when the angle of the movable part relative to the fixed part changes, the detection visual angle of the detector body arranged on the movable part also changes correspondingly, and therefore the detectable range of the detector body is larger. In addition, the intrusion detector further comprises a shielding prevention assembly, wherein the transmitter and the receiver in the shielding prevention assembly are both arranged on the movable part, in the embodiment, the transmitter and the receiver can be directly arranged on the movable part and also can be indirectly arranged on the movable part, for example, the movable part is fixedly connected with a printed circuit board, the transmitter and the receiver are both fixed on the printed circuit board, and the relative position relation between the transmitter and the receiver and the detector main body is always kept unchanged. Therefore, the intrusion detector in the embodiment of the application has a wider anti-blocking angle range.

In addition, according to the embodiment of the application, the following additional technical features can be provided:

in some embodiments of the present application, a light transmissive window is disposed on the housing, the intrusion detector further includes a fresnel lens disposed on the light transmissive window, the fresnel lens being an arc lens; the movable part comprises a rotating table and a circuit board arranged on the rotating table, the detector body, the transmitter and the receiver are all arranged on the circuit board, the fixed part comprises a base and a supporting platform fixedly connected with the base, the base is fixedly connected with the shell, the support platform is provided with a shaft hole, the movable part also comprises a rotating shaft fixed on the rotating platform, the rotating shaft penetrates through the shaft hole, the rotating shaft is parallel to or collinear with the centroid axis of the arc-shaped lens, the rotating table rotates along the horizontal direction, the rotatable angle range of the rotating table is 90 degrees, the shielding prevention assembly further comprises a light guide column, one end of the light guide column is abutted to the emitter and can rotate along with the movable part, and the other end of the light guide column is close to the Fresnel lens.

In some embodiments of the present application, the intrusion detector further includes an elastic member, one end of the elastic member abuts against the supporting table, and the other end of the elastic member abuts against the rotating shaft.

In some embodiments of this application, be provided with on the revolving stage and have elastic location arch, still be provided with on the base with a plurality of positioning groove of protruding looks adaptation in location, work as when movable portion stall, the protruding joint of location is fixed in one of them in the positioning groove. In some embodiments of this application, prevent sheltering from subassembly still includes the sleeve pipe that is in the light, the sheathed tube one end fixed connection that is in the light is in on the circuit board, the sheathed tube other end that is in the light is close to fresnel lens, the transmitter quilt cover is established in the sleeve pipe that is in the light, the leaded light post is fixed in the sleeve pipe that is in the light, the one end of leaded light post is close to the transmitter, the other end of leaded light post is close to fresnel lens.

In some embodiments of this application, the sleeve pipe that is in the light includes first section and second section that links to each other, the second section is close to the fresnel lens, first section with circuit board fixed connection, first section is the stereoplasm material that is in the light, the material of second section is soft material that is in the light, the sleeve pipe that is in the light covers wholly the leaded light post, first section with the connection position of circuit board is in on the axis of symmetry of arcuate lens, just first section with the connection position of circuit board is located the rotation center of movable part, keeping away from of second section the one end of first section with the interference fit of fresnel lens.

In some embodiments of this application, be formed with the blend stop on the casing, the blend stop is the arc and prolongs the circumferencial direction of the fresnel lens extends, the blend stop will the light transmission window is separated for first light transmission region and second light transmission region, the transmitter with first light transmission region corresponds, the receiver with second light transmission region corresponds, the blend stop with the casing prescribes a limit to the spacing groove jointly, be in the light sheathed tube with the junction site of circuit board is in on the axis of the shape of the arcuate lens, just be in the light sheathed tube with the junction site of circuit board is located the rotation center of movable part, the tip of leaded light post is stretched out the sleeve pipe that is in the light and restriction are in the spacing groove, the tip of leaded light post with the clearance has between the fresnel lens.

In some embodiments of the present application, the intrusion detector further includes a blocking piece, the blocking piece is arc-shaped and disposed on the barrier strip, and a distance from an inner edge of the blocking piece to a centroid axis of the arc-shaped lens is smaller than a length of the light blocking sleeve.

In some embodiments of the present application, the intrusion detector further comprises an LED indicator disposed on the circuit board, the LED indicator being covered in the light blocking sleeve.

In some embodiments of this application, intrusion detector still includes fresnel lens and sealing member, the sealing member is located at least partially the casing with between the fresnel lens, the casing with fresnel lens fixed set up, the casing includes at least one cambered surface board and holds the chamber, the support frame the detector main part with prevent that the subassembly that shelters from all sets up hold the intracavity, the cambered surface board is located at least one side of casing, fresnel lens is the arc, fresnel lens covers at least part hold the chamber, the cambered surface board the surface with the surface parallel and level setting of fresnel lens.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Like reference numerals refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of an intrusion detector according to an embodiment of the present application;

FIG. 2 is a schematic view of an intrusion detector according to an embodiment of the present application in operation (foreign objects block the detection view of the intrusion detector, detect straight ahead);

FIG. 3 is a schematic view of an intrusion detector according to an embodiment of the present application in operation (foreign objects block the detection view of the intrusion detector, and the detection view is deflected);

FIG. 4 is a schematic view of an intrusion detector of one embodiment of the present application in operation (paint or spray blocking the detection view of the intrusion detector, detecting straight ahead);

FIG. 5 is a schematic view of an intrusion detector of one embodiment of the present application in operation (paint or spray blocking the detection view of the intrusion detector, the detection view being deflected);

FIG. 6 is a schematic structural diagram of an intrusion detector according to an embodiment of the present application;

fig. 7 is a schematic structural view of an intrusion detector according to an embodiment of the present application (a rotary table is provided with a positioning protrusion, and a support table is provided with a positioning groove);

fig. 8 is a schematic structural diagram of an intrusion detector according to an embodiment of the present application (a support platform is provided with a scale);

FIG. 9 is a schematic structural diagram of a support stage of an intrusion detector according to an embodiment of the present application;

FIG. 10 is a schematic structural view of an intrusion detector according to an embodiment of the present application (the housing is provided with a blocking plate);

FIG. 11 is a schematic view of an intrusion detector according to another embodiment of the present application (detecting right in front);

FIG. 12 is a schematic view of an intrusion detector according to another embodiment of the present application (with a detection view angle deflected);

FIG. 13 is a schematic structural diagram of an intrusion detector according to yet another embodiment of the present application;

FIG. 14 is a schematic view of an intrusion detector according to yet another embodiment of the present application (partially enlarged transparent window);

fig. 15 is a schematic view of an assembly structure of an intrusion detector according to an embodiment of the present application.

The reference symbols in the drawings denote the following:

100-a housing; 101-an arc panel; 102-a containment chamber; 103-arc mounting surface;

110-a support frame; 111-a fixed part; 1111-support table; 11111-shaft hole;

11112-scale; 1112-a base; 11121-positioning groove; 112-movable part;

1121 — rotating table; 11211 — positioning boss; 11212 — scale; 1122-circuit board;

11212-rotating shaft; 120-a light-transmitting window; 121 — a first light transmitting area; 122 — second light transmitting area;

130-a fresnel lens; 140-barrier strip; 150-a limiting groove; 160-a barrier sheet;

200-an anti-occlusion component; 210-a transmitter; 220-a receiver; 230-a light guide column;

240-light blocking sleeve; 2401 — a first snap-in portion; 300 — a probe body; 400-protective layer;

410-a second clamping part; 600-a seal; 30-a foreign body; 40-painting;

z01 — view angle of view; m-horizontal direction.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

As shown in fig. 1, the embodiment of the present application proposes an intrusion detector. The intrusion detector includes a housing 100, a support bracket 110, a detector body 300, and an anti-shielding assembly 200. The supporting frame 110 is disposed in the casing 100, and the supporting frame 110 includes a fixed portion 111 and a movable portion 112, the fixed portion 111 is fixedly connected to the movable portion 112, where the fixed connection is a direct fixed connection between the fixed portion 111 and the movable portion 112, as another embodiment, the fixed portion and the movable portion may be indirectly fixedly connected or may be fixedly connected through another component, for example, an intermediate connection portion is disposed between the fixed portion and the movable portion, and the intermediate connection portion is directly fixedly connected to the fixed portion and the movable portion respectively. Fixed connections, both here and throughout, may include direct fixed connections and indirect fixed connections. The movable part 112 can rotate relative to the fixed part 111, but in this embodiment, the movable part 112 can rotate, and the fixed part 111 is fixed, and as another real-time mode, the movable part rotates through the rotation of the fixed part. The movable portion is movable with respect to the light-transmitting window. The probe body 300 is provided on the movable portion 112. The anti-shield assembly 200 includes a transmitter 210 and a receiver 220, the transmitter 210 configured to transmit a detection signal for detecting the shield, the receiver 220 configured to receive a reflected signal formed by the detection signal being reflected by the shield, the transmitter 210 and the receiver 220 both being disposed on the movable portion 112.

It is understood that in the present embodiment, the transmitter 210 and the receiver 220 may be directly disposed on the movable portion 112, or may be indirectly disposed on the movable portion 112.

According to the intrusion detector of the embodiment of the present application, the supporting member 110 is disposed inside the housing 100, and the movable portion 112 and the fixed portion 111 rotate relatively. That is, the movable portion 112 of the supporting frame 110 is connected to the fixed portion 111 in an angularly adjustable manner, and when the movable portion 112 changes its angle relative to the fixed portion 111, the detection view angle Z01 of the probe body 300 mounted on the movable portion 112 also changes accordingly, so that the detectable range of the probe body 300 is relatively large. In addition, the intrusion detector further includes an anti-blocking assembly 200, and the transmitter 210 and the receiver 220 in the anti-blocking assembly 200 are both disposed on the movable portion 112, which keeps the relative positional relationship between the transmitter 210 and the receiver 220 and the detector main body 300 unchanged all the time, so that the anti-blocking viewing angle of the anti-blocking assembly 200 changes while the detection viewing angle Z01 of the detector main body 300 changes, and thus the anti-blocking viewing angle of the anti-blocking assembly 200 and the detection viewing angle Z01 of the detector main body 300 can be kept consistent all the time. Therefore, the intrusion detector in the embodiment of the application has a wider anti-blocking angle range.

Referring to fig. 2 and 4, fig. 2 illustrates a situation that the intrusion detector is shielded by the foreign object 30, at this time, the transmitter 210 in the anti-shielding assembly 200 sends a detection signal, and the receiver 220 receives the reflection signal reflected by the foreign object 30, and then can determine that the intrusion detector is shielded by the foreign object 30, fig. 4 illustrates a situation that the intrusion detector is painted or sprayed, and when the intrusion detector is covered with the paint 40 or other sprayed liquid, the transmitter 210 in the anti-shielding assembly 200 sends a detection signal, and the receiver 220 receives the reflection signal reflected by the paint 40 or other sprayed liquid, then can determine that the intrusion detector is shielded. Fig. 3 and 5 show that when the detection view angle Z01 of the intrusion detector changes, the detection view angle of the anti-blocking assembly 200 can also change with the change of the detection view angle Z01. In this embodiment, the detection viewing angle of the anti-blocking component 200 and the detection viewing angle Z01 of the intrusion detector can be always kept consistent, so that the anti-blocking detection viewing angle of the intrusion detector is enlarged.

The shielding material in the embodiment of the present application includes not only foreign substances but also paint or liquid spray. That is, the present application does not limit the type of shade.

In some embodiments of the present application, the housing 100 is provided with the light-transmitting window 120, the intrusion detector further includes a fresnel lens 130 disposed on the light-transmitting window 120, the fresnel lens 130 is an arc lens, the movable portion 112 includes a rotating table 1121 and a circuit board 1122 disposed on the rotating table 1121, the detector main body 300, the emitter 210 and the receiver 220 are disposed on the circuit board 1122, the fixing portion 111 includes a base 1112 and a supporting table 1111 fixedly connected to the base 1112, the base 1112 is fixedly connected to the housing 100, the supporting table 1111 is provided with a shaft hole 11111, the movable portion 112 further includes a rotating shaft 11212 fixed on the rotating table 1121, the rotating shaft 11212 is inserted into the shaft hole 11111, the rotating shaft 11212 is parallel or collinear with a centroid axis of the arc lens, in fig. 1, M is a horizontal direction, the rotating table 1121 rotates along the horizontal direction, an angular range within which the rotating table 1121 can rotate is 90 °, the shielding assembly 200 further includes the light-guiding pillar 230, one end of the light guide bar 230 abuts against the emitter 210 and can rotate with the movable part 112, and the other end of the light guide bar 230 is close to the fresnel lens 130. It should be noted that, as an embodiment, a surface of the rotating table is at least partially a plane, the circuit board is disposed on at least a portion of the plane of the rotating table, the detector body, the transmitter, and the receiver are disposed on the circuit board, and the circuit board can be driven by the movable portion to rotate in a horizontal direction. And the rotating table can be stopped at any position within the rotating range thereof or the rotating table is provided with a gear position, and the rotating table is stopped at a set fixed angle.

It will be appreciated that any cross-section of the curved lens may define an arc which defines a centroid, and that the line joining the centroids of the various cross-sections of the curved lens is the centroid axis.

In the present embodiment, the rotation shaft 11212 of the movable portion 112 and the shaft hole 11111 of the fixed portion 111 are engaged, i.e., a hinge structure is formed, so that the movable portion 112 can rotate relative to the fixed portion 111. In addition, the rotation axis 11212 is parallel to or collinear with the centroid axis of the arc lens, i.e., the rotation axis 11212 is perpendicular to the cross section of the arc lens, thereby making the rotation direction of the movable portion 112 the circumferential direction of the arc lens.

It is understood that the rotation range of the movable portion 112 can be set according to the angular range covered by the effective optical area of the fresnel lens 130. If the angular range covered by the effective optical area of the fresnel lens 130 is large, the rotation range of the movable portion 112 can be set large. On the contrary, if the angular range covered by the effective optical area of the fresnel lens 130 is small, the rotation range of the movable portion 112 can be set smaller. Therefore, the detection signal of the detector body 300 and the detection signal of the emitter 210 can be ensured to exit through the Nerphy lens 130, and the phenomenon that the detection signal is reflected by the shell 100 and invades into the detector to become noise is avoided.

In the present embodiment, the rotation stage 1121 can be rotated at an angle of 90 °, and specifically, when the detection angle of view of the detector main body 300 is 90 °, the detection angle of view of the intrusion detector can reach 180 ° with the rotation of the rotation stage 1121, so that a larger range can be covered.

In the present embodiment, the detector body 300, the emitter 210 and the receiver 220 are disposed on the circuit board 1122, and the circuit board 1122 is disposed on the rotating platform 1121, so that when the rotating platform 1121 is angularly changed, the detector body 300, the emitter 210 and the receiver 220 can be driven by the circuit board 1122 to synchronously rotate, so that the detection angle Z01 and the shielding angle are synchronously changed. In addition, the detector body 300, the transmitter 210 and the receiver 220 are all disposed on the circuit board 1122, and complicated wiring can be omitted, so that the structure is simple.

Although the transmitter 210 can transmit the detection signal, the signal-to-noise ratio of the near infrared ray is very low, and the effective signal that the receiver 220 can receive is very weak and easily swamped by the remaining noise. In this embodiment, by providing the light guide bar 230, the detection signal emitted by the emitter 210 can be guided to the fresnel lens 130 and then transmitted out through the fresnel lens 130, so that more detection signals can be emitted to the external environment, thereby improving the emission intensity of the detection signal.

In one specific embodiment, the intrusion detector further includes an elastic member (not shown), one end of the elastic member abuts against the supporting base 1111, and the other end of the elastic member abuts against the rotating shaft 11212. When the external force drives the rotation table 112 to rotate in the horizontal direction, the elastic member does not affect the rotation of the rotation table 112, and when the external force disappears, the elastic force of the elastic member can fix the rotation shaft 11212 to the support table 1111. In this embodiment, the external force can drive the rotation table 112 to rotate continuously and angularly, and when the external force disappears, both ends of the elastic member respectively abut against the supporting base 1111 and the rotation shaft 11212, and at this time, the elastic force of the elastic member can make the rotation table 1121 static with respect to the supporting base 1111, that is, the rotation table 1121 can be fixed at any angle with respect to the supporting base 1111, so that the shaking between the rotation table 1121 and the supporting base 1111 can be avoided.

As shown in fig. 6 to 9, in another specific embodiment, the rotating platform 1121 is provided with a positioning protrusion 11211 having elasticity, and the base 1112 is further provided with a plurality of positioning grooves 11121 adapted to the positioning protrusion 11211, so that when the movable portion 112 stops rotating, the positioning protrusion 11211 can be engaged and fixed in one of the positioning grooves 11121. In some embodiments, the number of the positioning grooves 11121 is 9, when the positioning protrusion 11211 is located in the middle positioning groove 11121, the detection angle of the intrusion detector is right in front, and when the positioning protrusion 11211 is located in the edge positioning groove 11121, the intrusion detector can detect the edge region. When the external force drives the rotation platform 1121 to rotate, the positioning protrusion 11211 has elasticity, so that the rotation of the rotation platform 1121 is not affected, and when the external force disappears, the positioning protrusion 11211 can be engaged in any one of the positioning grooves 11121.

In some embodiments, a scale 11112 is disposed on the support 1111, and a scale 11212 adapted to the scale 11112 is disposed on the rotation table 1121, so that when the rotation table 1121 rotates, the rotation angle can be read from the scale 11112 in real time.

In other embodiments, the intrusion detector further includes a driving device (not shown) connected to the rotating shaft 11212 to drive the rotating shaft 11212 to rotate with respect to the fixing portion 111. When the rotating shaft 11212 rotates, the rotating table 1121 and the circuit board 1122 on the rotating table 1121 are driven to rotate synchronously.

In some embodiments, the driving device may be a rotation motor, the rotation motor may be mounted on the fixed portion 111, and accordingly, an output end of the rotation motor may be connected to the rotation shaft 11212, so that the movable portion 112 may be driven to rotate relative to the fixed portion 111 by the rotation motor in an operating state. In other embodiments, the driving device may also be a combination of a motor and a transmission assembly, wherein the transmission assembly is, for example, a gear transmission assembly, a synchronous belt transmission assembly, etc. which are more common.

In some embodiments of the present application, the transmitter 210 is a near infrared transmitter capable of emitting near infrared rays, and the receiver 220 is a near infrared receiver, in this case, the detection signal emitted by the transmitter 210 for detecting the obstruction is near infrared rays, and accordingly, the receiver 220 is configured to receive the reflected light formed by the near infrared rays emitted by the transmitter 210 being reflected by the obstruction. Since the human body radiates infrared rays with a wave band of 6-15 μm, when the human body enters the detection range of the intrusion detector, the infrared rays radiated by the human body pass through the fresnel lens 130, and the infrared energy of the infrared rays is focused to the detector main body 300 by the fresnel lens 130, so that the detector main body 300 detects the intrusion of the human body.

Wherein, the Near Infrared (NIR) has a wavelength range between visible light and middle and far infrared, which generally refers to electromagnetic wave of 750nm-3 μm.

In some embodiments of the present application, the shielding assembly 200 further includes a light blocking sleeve 240, one end of the light blocking sleeve 240 is fixedly connected to the circuit board 1122, the other end of the light blocking sleeve 240 is close to the fresnel lens 130, the emitter 210 is covered in the light blocking sleeve 240, the light guiding column 230 is fixed in the light blocking sleeve 240, one end of the light guiding column 230 is close to the emitter 210, and the other end of the light guiding column 230 is close to the fresnel lens 130.

In addition, since the reflected signal that blocks the generated probe signal is generally very weak, it is necessary to amplify the signal sufficiently in the circuit to make it possible to read out the signal value. At this time, if a part of the detection signal emitted by the transmitter 210 is not conducted out of the light guide bar 230, and is directly received by the receiver 220 inside the intrusion detector as a stray signal, under such an amplification factor, the part of the stray signal easily causes the saturation of the receiver 220, thereby causing the anti-blocking assembly 200 to fail. Therefore, in the embodiment, the light blocking sleeve 240 is further disposed outside the light guiding column 230, and the emitter 210 and the light guiding column 230 are both disposed in the light blocking sleeve 240, so that stray signals can be effectively prevented from being transmitted inside the intrusion detector, and the detection accuracy of the anti-blocking assembly 200 is improved.

Specifically, a hollow mounting post structure (not shown in the figure) may be disposed on the circuit board 1122, and one end of the light blocking sleeve 240 is sleeved on the mounting post structure and combined with the mounting post structure (for example, sleeved in an interference fit manner, combined in an adhesive manner, and the like), so that the light blocking sleeve 240 is fixedly connected to the circuit board 1122.

In some specific embodiments, the light blocking sleeve 240 is provided with a first clamping portion 2401, the light guiding column is provided with a groove body matched with the first clamping portion 2401, and the light guiding column 230 can be fixed on the light blocking sleeve 240 by clamping the first clamping portion 2401 in the groove body.

In some embodiments, the intrusion detector may further include a protective layer 400, and the light blocking sleeve 240 is fixedly connected to the protective layer 400. The protective layer 400 is provided with a second clamping portion 410, the rotating platform 1121 is provided with a groove body matched with the second clamping portion 410, the circuit board 1122 is provided with a through hole matched with the second clamping portion 410, when the circuit board is installed, the circuit board 1122 is placed on the rotating platform 1121, and then the second clamping portion 410 penetrates through the through hole and is clamped on the groove body in the rotating platform 1121, so that the circuit board 1122 is clamped between the protective layer 400 and the rotating platform 1121.

In some embodiments of the present application, the light-blocking sleeve 240 includes a first section and a second section connected to each other, wherein the second section is close to the fresnel lens 130, and the first section is fixedly connected to the circuit board 1122, that is, the portion of the light-blocking sleeve 240 close to the fresnel lens 130 is the second section. Furthermore, the first section is made of a hard light blocking material, and the second section is made of a soft light blocking material. The light blocking sleeve 240 covers the entire light guide bar 230, the connection portion of the first section with the circuit board 1122 is located on the centroid axis of the arc-shaped lens, the connection portion of the first section with the circuit board is located at the rotation center of the movable portion, and one end of the second section, which is far away from the first section, is in interference fit with the fresnel lens 130.

In the present embodiment, the connection portion of the first section with the circuit board 1122 is located on the centroid axis of the arc-shaped lens, so that the distance between the end of the light-blocking sleeve 240 close to the fresnel lens 130 and the fresnel lens 130 is not changed during the rotation of the movable portion 112. On this basis, the second section adopts flexible light blocking material to the one end of second section of keeping away from first section and the interference fit of fresnel lens 130, like this, can avoid producing the clearance between fresnel lens 130 and light blocking sleeve pipe 240 in movable part 112 pivoted in-process, from this, can further avoid stray signal to enter into intrusion detector's inside, with the detection precision of further improving anti-shielding subassembly 200.

It can be understood that, the boundaries of the first section and the second section of the light-blocking sleeve 240 can be set according to actual requirements, and one of the principles is to make the portion of the light-blocking sleeve 240 contacting with the fresnel lens 130 be a soft material. In addition, the first section and the second section can be manufactured and molded respectively and then combined together. Alternatively, the first section may be manufactured by injection molding of hard rubber, and the second section may be manufactured by secondary injection molding of soft rubber on the basis of the first section.

In addition, the color of the light-blocking sleeve 240 is preferably black, and since black can better absorb light, when the light-blocking sleeve 240 is thinner, the black light-blocking sleeve 240 can more effectively block stray signals, and the stray signals are prevented from being transmitted inside the intrusion detector. When the wall thickness of the light blocking sleeve 240 is thick, the color thereof may also be brown, red, etc., and a good light blocking effect may also be obtained.

In some embodiments of the present application, as shown in fig. 10 to 14, a barrier 140 is formed on the housing 100, the barrier 140 is arc-shaped and extends along a circumferential direction of the fresnel lens 130, the barrier 140 divides the light-transmitting window 120 into a first light-transmitting region 121 and a second light-transmitting region 122, the emitter 210 corresponds to the first light-transmitting region 121, the receiver 220 corresponds to the second light-transmitting region 122, and the barrier 140 and the housing 100 jointly define a limiting groove 150. The connection portion of the light blocking sleeve 240 and the circuit board 1122 is located on the centroid axis of the arc lens, the connection portion of the light blocking sleeve 240 and the circuit board 1122 is located at the rotation center of the movable portion 112, the end portion of the light guide column 230 is limited in the limiting groove 150, and a gap is formed between the end portion of the light guide column 230 and the fresnel lens 130.

In the present embodiment, the connection portion of the light-blocking sleeve 240 and the circuit board 1122 is located on the centroid axis of the arc-shaped lens, so that the distance between the end of the light-blocking sleeve 240 close to the fresnel lens 130 and the fresnel lens 130 is not changed during the rotation of the movable portion 112. On the basis, the end of the light guide bar 230 is limited in the limit groove 150 defined by the barrier strip 140 and the casing 100, and the end of the light guide bar 230 always faces the first light-transmitting area 121, and the receiver 220 faces the second light-transmitting area 122. In this way, the side wall of the limiting groove 150 (a part of the structure of the barrier strip 140 and a part of the structure of the housing 100) can form a certain shield at the end of the light guide bar 230, thereby reducing the detection signal guided to the end of the light guide bar 230 to be directly received by the receiver 220. In addition, a gap is formed between the end of the light guide 230 and the fresnel lens 130, so that the abrasion of the fresnel lens 130 caused by the contact between the light guide 230 and the fresnel lens 130 during movement can be avoided.

In some embodiments of the present application, the intrusion detector further includes a blocking piece 160, the blocking piece 160 is arc-shaped and disposed on the barrier rib 140, and a distance from an inner edge of the blocking piece 160 to a centroid axis of the arc-shaped lens is less than a length of the light blocking sleeve 240. Although the shielding effect of the side wall of the limiting groove 150 can reduce the detection signal from being directly received by the receiver 220 to some extent. However, a part of the detection signal will return to the interior of the intrusion detector, especially leaking through the gap between the light-blocking sleeve 240 and the housing 100 or the barrier strip 140. The blocking piece 160 is arranged to expand the blocking range, so that the detection signal can be further directly received by the receiver 220. In addition, the distance from the inner edge of the blocking piece 160 to the centroid axis of the arc-shaped lens is smaller than the length of the light blocking sleeve 240, so that the blocking range of the blocking piece 160 can cover the end of the light blocking sleeve 240, thereby effectively preventing the detection signal from leaking out from the gap between the light blocking sleeve 240 and the housing 100 or the barrier strip 140 and being directly received by the receiver 220.

In some embodiments of the present application, the intrusion detector further includes an LED indicator (not shown) disposed on circuit board 1122, which is housed within light-blocking sleeve 240.

In this embodiment, the light guide column 230 can guide the detection signal that the transmitter 210 transmitted and the light that the LED pilot lamp transmitted to the exit 0 of the Nerphy lens 130 simultaneously, from this, can improve the utilization ratio of light guide column 230, and need not set up light guide structure in addition for the LED pilot lamp again, can optimize the inner space of intrusion detector product like this, be favorable to the miniaturized design of product, but also be favorable to reducing the manufacturing cost of intrusion detector.

As shown in fig. 15, in some embodiments of the present application, the intrusion detector further includes a fresnel lens 130 and a sealing member 600, the sealing member 600 is at least partially located between the housing 100 and the fresnel lens 130, the housing 100 is fixedly disposed on the fresnel lens 130, the housing 100 includes at least one curved panel 101 and an accommodating cavity 102, the supporting frame 110, the detector main body 300 and the shielding assembly 200 are all disposed in the accommodating cavity 102, the curved panel 101 is at least located on one side of the housing 100, the fresnel lens 130 is curved, the fresnel lens 130 covers at least part of the accommodating cavity 102, and an outer surface of the curved panel 101 is flush with an outer surface of the fresnel lens 130.

It is understood that the case 100 and the fresnel lens 130 are fixedly disposed, and they may be directly fixed together or indirectly fixed together by disposing a connecting member therebetween, and in this embodiment, the disposing of the sealing member 600 between the case 100 and the fresnel lens 130 is only one embodiment.

According to the intrusion detector in the embodiment of the application, the housing 100 is provided with the arc-shaped panel 101, and the fresnel lens 130 is also arc-shaped, when the fresnel lens 130 covers the accommodating cavity of the housing 100, the arc-shaped panel 101 of the housing 100 is flush with the outer surface of the fresnel lens 130, so that the appearance attractiveness of the intrusion detector can be improved, and the attractive and elegant appearance of the whole arc surface can be obtained. Furthermore, a sealing member 600 is disposed between the housing 100 and the fresnel lens 130, so that the inner space of the intrusion detector can be completely isolated from the outer space, and thus the housing 100 and the fresnel lens 130 after installation can have a waterproof function, and fig. 10 is a schematic structural diagram of the intrusion detector after installation.

Note that the outer surface of the curved panel 101 is flush with the outer surface of the fresnel lens 130, which allows some installation error. That is, even in the case where there is a certain mounting error, the flush setting in the present embodiment can be considered. Wherein, the installation error is not more than 10% of the radius of the arc panel 101.

The embodiment of another aspect of the application provides an installation method of an intrusion detector. The installation method comprises the following steps:

providing a shell 100 of the intrusion detector, wherein a window area is arranged on the shell 100, the shell 100 comprises two arc-shaped panels 101 which are oppositely arranged and an arc-shaped mounting surface 103 which is arranged next to the arc-shaped panels, the window area is positioned between the two arc-shaped panels 101, and the radius of the arc-shaped panels 101 is larger than that of the arc-shaped mounting surface 103;

providing a Fresnel lens 130, wherein the thickness of the Fresnel lens 130 is equal to the difference between the radius of the arc-shaped panel 101 and the radius of the arc-shaped mounting surface 103;

bending the Fresnel lens 130 into an arc shape matched with the arc-shaped mounting surface 103;

the fresnel lens 130 is mounted on the housing 100 such that the fresnel lens 130 covers the window area and the fresnel lens 130 is closely attached to the two arc-shaped mounting surfaces 103.

Fig. 10 is a schematic structural diagram of the installed intrusion detector, and it can be seen that by the installation method of the intrusion detector in the embodiment of the present application, the surface of the fresnel lens 130 and the surface of the arc panel 101 of the installed intrusion detector can be in a flush state, so that the aesthetic property of the appearance of the intrusion detector can be improved, and the beautiful and elegant appearance of the whole arc surface can be obtained.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiments of the present application are described in a related manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only for the preferred embodiment of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. An intrusion detector, comprising:

a housing;

the supporting frame is arranged in the shell and comprises a fixed part and a movable part, the fixed part is fixedly connected with the movable part, and the movable part and the fixed part rotate relatively;

a probe body provided on the movable portion; and

an anti-shield assembly including a transmitter configured to transmit a detection signal for detecting a shield and a receiver configured to receive a reflected signal formed by the detection signal being reflected by the shield, the transmitter and the receiver being both provided on the movable portion.

2. The intrusion detector of claim 1, wherein the movable portion includes a rotary table and a circuit board disposed on the rotary table, the detector body, the transmitter and the receiver are disposed on the circuit board, the surface of the rotary table is at least partially planar, the circuit board is disposed on at least a portion of the planar surface of the rotary table, the detector body, the transmitter and the receiver are disposed on the circuit board, and the circuit board is driven by the movable portion to rotate in a horizontal direction.

3. The intrusion detector of claim 1 or 2, wherein a light-transmissive window is disposed on the housing, and the intrusion detector further comprises a fresnel lens disposed on the light-transmissive window, the fresnel lens being an arc lens;

the movable part comprises a rotating table and a circuit board arranged on the rotating table, the detector body, the transmitter and the receiver are all arranged on the circuit board, the fixed part comprises a base and a supporting platform fixedly connected with the base, the base is fixedly connected with the shell, the support platform is provided with a shaft hole, the movable part also comprises a rotating shaft fixed on the rotating platform, the rotating shaft penetrates through the shaft hole, the rotating shaft is parallel to or collinear with the centroid axis of the arc-shaped lens, the rotating table rotates along the horizontal direction, the rotatable angle range of the rotating table is 90 degrees, the shielding prevention assembly further comprises a light guide column, one end of the light guide column is abutted to the emitter and can rotate along with the movable part, and the other end of the light guide column is close to the Fresnel lens.

4. The intrusion detector of claim 3, further comprising an elastic member, one end of the elastic member abutting against the support base, and the other end of the elastic member abutting against the rotation shaft.

5. The intrusion detector of claim 3, wherein the rotary table is provided with an elastic positioning protrusion, the base is further provided with a plurality of positioning grooves adapted to the positioning protrusion, and when the movable part stops rotating, the positioning protrusion can be clamped and fixed in one of the positioning grooves.

6. The intrusion detector of claim 3, wherein the anti-blocking assembly further comprises a light-blocking sleeve, one end of the light-blocking sleeve is fixedly connected to the circuit board, the other end of the light-blocking sleeve is close to the Nerphil lens, the emitter is covered in the light-blocking sleeve, the light guide pillar is fixed in the light-blocking sleeve, one end of the light guide pillar is close to the emitter, and the other end of the light guide pillar is close to the Nerphil lens.

7. The intrusion detector of claim 6, wherein the light blocking sleeve includes a first section and a second section connected to each other, the second section is close to the fresnel lens, the first section is fixedly connected to the circuit board, the first section is made of a hard light blocking material, the second section is made of a soft light blocking material, the light blocking sleeve covers the entire light guiding column, a connection portion of the first section to the circuit board is located on a centroid axis of the arc lens, a connection portion of the first section to the circuit board is located at a rotation center of the movable portion, and one end of the second section, which is far away from the first section, is in interference fit with the fresnel lens.

8. The intrusion detector of claim 6, wherein the housing is formed with a barrier strip, the barrier strip is arc-shaped and extends along a circumferential direction of the fresnel lens, the barrier strip divides the light transmission window into a first light transmission area and a second light transmission area, the emitter corresponds to the first light transmission area, the receiver corresponds to the second light transmission area, the barrier strip and the housing together define a limiting groove, a connection portion of the light blocking sleeve and the circuit board is located on a centroid axis of the arcuate lens, a connection portion of the light blocking sleeve and the circuit board is located at a rotation center of the movable portion, an end portion of the light guiding column extends out of the light blocking sleeve and is limited in the limiting groove, and a gap is formed between the end portion of the light guiding column and the fresnel lens.

9. The intrusion detector of claim 8, further comprising a blocking piece, wherein the blocking piece is arc-shaped and disposed on the barrier strip, and a distance from an inner edge of the blocking piece to a centroid axis of the arc-shaped lens is smaller than a length of the light blocking sleeve.

10. The intrusion detector of any one of claims 6 to 9, further comprising an LED indicator disposed on the circuit board, the LED indicator being housed within the light-blocking sleeve.

11. The intrusion detector of claim 1 or 2, wherein the fixed part is relatively fixed with respect to the housing, the movable part is relatively rotatable with respect to the housing, and the rotating table is capable of stopping at any position within its rotation range;

alternatively, the fixed portion is fixed relative to the housing, the movable portion is rotatable relative to the housing, the rotary table is provided with a shift position, and the rotary table is stopped at a set fixed angle.

12. The intrusion detector of claim 1, further comprising a fresnel lens and a sealing member, wherein the sealing member is at least partially located between the housing and the fresnel lens, the housing and the fresnel lens are fixedly disposed, the housing comprises at least one arc-shaped panel and an accommodating cavity, the support frame, the detector body and the shielding assembly are disposed in the accommodating cavity, the arc-shaped panel is at least located on one side of the housing, the fresnel lens is arc-shaped, the fresnel lens covers at least a portion of the accommodating cavity, and an outer surface of the arc-shaped panel is flush with an outer surface of the fresnel lens.