CN104700531B - A kind of long-range pyroelectric sensing supervising device - Google Patents

Abstract

The invention discloses a kind of long-range pyroelectric sensing supervising device, including LED, Fresnel Lenses, trigger, the Fresnel Lenses quantity is two, while two Fresnel Lenses are at an angle, even if having personnel just watch-dog is come up also can actual induction to infrared signal, button on the trigger can be moved, and alarm can be cancelled by correctly pressing the corresponding button at the appointed time.This invention efficiently solves traditional pyroelectric sensing watch-dog and senses insensitive problem to positive close personnel.

Description

A remote pyroelectric induction monitoring device

technical field

The invention relates to a monitoring and alarming device, in particular to a remote pyroelectric induction monitoring device.

Background technique

Houses, factories, warehouses, waterworks and other places are very sensitive to the entry of personnel. For example, places where important items are stored are generally protected by security doors, security windows, and walls, but it is still difficult to avoid the entry of personnel, so a The device that can monitor the entry and exit of people, the pyroelectric sensor monitor was born.

The pyroelectric induction monitor is mainly made of a material with a high pyroelectric coefficient, such as lead zirconate titanate ceramics, lithium tantalate, and triglyceride titanium sulfate. One or two detection elements are installed in each detector, and the two detection elements are connected in series with reverse polarity to suppress the interference caused by the rise of its own temperature. The detected and received infrared radiation is converted into a weak voltage signal by the detection element, which is amplified by the field effect tube installed in the probe and then output to the outside. Generally, a Fresnel lens is installed in front of the detector to improve the detection sensitivity of the detector and increase the detection distance. The lens is made of transparent plastic, and the upper and lower parts of the lens are divided into several equal parts. , a lens with a special optical system is made, and it cooperates with the amplification circuit to amplify the signal many times, so that the actions of people in a farther range can be measured.

The Fresnel lens uses the special optical principle of the lens to produce an alternating "blind area" and "high-sensitivity area" in front of the detector to improve its detection and reception sensitivity. When someone walks in front of the lens, the infrared rays emitted by the human body will alternately enter the "high-sensitivity area" from the "blind area" continuously, so that the received infrared signal is input in the form of pulses that are strong and weak, thereby increasing its energy amplitude. . It is widely used in personnel monitoring in residential villas, factories, companies, schools, warehouses and many other fields.

Most of the traditional pyroelectric sensor monitors are equipped with Fresnel lenses. It has a disadvantage that it is only sensitive to people moving radially along the Fresnel lens, but relatively slow to people moving perpendicular to the Fresnel lens. This may cause unrelated personnel to cause monitoring busy spots when approaching perpendicular to the Fresnel lens. On the other hand, if an authorized person enters multiple times, an alarm will be generated, which will cause the monitoring personnel to be frequently disturbed and cause mental stress. If the device is temporarily closed, there will be a risk of omission of personnel entering and leaving.

Contents of the invention

The present invention aims at the deficiencies of the prior art, and provides a remote pyroelectric induction monitoring device. This remote pyroelectric induction monitor can be sensitively sensed when personnel approach perpendicular to the Fresnel lens, and can be reached through special keys. Authorized personnel disarm the alarm.

In order to solve the above-mentioned technical problems, the present invention is solved through the following technical solutions: a remote pyroelectric induction monitoring device, including a housing 1, on which a trigger 2, an LED light, a Fresnel Lens 13, said Fresnel lens 13 is left and right two, and said Fresnel lens 13 is mutually in a certain inclination angle, when personnel is perpendicular to Fresnel lens 13 when approaching, there is at least one Fresnel lens 13 and human body The direction of movement is not vertical, so it senses the change of the infrared signal, sends the RF signal to the WIFI host, and then transmits it to the mobile terminal through the WIFI host transcoding, the RF transmitter sends the RF signal to the WIFI host, and the WIFI host receives the RF signal After the signal, an alarm signal is sent to the mobile terminal to alarm the owner. The housing is provided with a trigger 2. The trigger 2 is similar to the traditional "Huarongdao" toy, and each button can be moved in order. The trigger Device 2 has 6 buttons in total, one A-type button is used to cancel the alarm, and the remaining 5 B-type buttons will upgrade the alarm if pressed by mistake. When the detector receives the infrared light alternating signals projected by the two Fresnel lenses, it will immediately instruct the built-in RF transmitter to send the RF signal to the WIFI host, and the WIFI host decodes the RF signal and forwards it to the mobile terminal, and sends out an alarm on the monitor When the release alarm button is pressed within 5 seconds, the monitor sends a radio frequency signal to the WIFI host again to instruct it to cancel the alarm signal; when a person presses the B button by mistake, the monitor sends a radio frequency signal to the WIFI host again to instruct it to upgrade the alarm and send an alarm signal Notify the owner to the mobile terminal.

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

The invention utilizes the principle that the Fresnel lens is sensitive to the infrared signal sent by the radially moving object to increase the number of Fresnel lenses to two, and at the same time make them form a certain angle, so that even if the personnel are walking towards the monitor It can also ensure that at least one Fresnel lens perceives infrared changes. The setting of the button allows the personnel entering the area to choose to cancel the alarm, thus avoiding frequent alarms to the mobile terminal caused by the frequent entry and exit of the authorized person. At the same time, the mobile terminal can be moved The button setting enables the position of the A-type button to be changed irregularly, which increases the safety of alarm release.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a stent frame in an embodiment of the present invention.

Fig. 3 is a schematic diagram of the structure of the trigger body in the embodiment of the present invention.

Fig. 4 is an exploded view of the trigger body in the embodiment of the present invention.

Fig. 5 is a diagram illustrating the working principles of type A keys and type B keys in the embodiment of the present invention.

Fig. 6 is a schematic diagram of the structure of two buttons A and B in the embodiment of the present invention.

Fig. 7 is a cross-sectional view of A-A of the stent frame connecting bridge in the embodiment of the present invention.

In the figure: 1 housing, 11 bracket frame, 111 connecting bridge, 12 screws, 121 elastic rubber ring, 13 Fresnel lens, 14 LED light, 2 trigger, 211 button, 23 rod, 231 metal ring, 24 key surface , 311 trigger body, 31 upper guides, 32 insulating sheets, 33 lower guides, 34 elastomers, 35 insulators, 36 cuboids, 41 elastic metal strips, 42 elastic metal sheets, 5 slits, 51 back key slots.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments: Referring to Figures 1 to 7, a remote pyroelectric induction monitoring device includes a housing 1 on which triggers 2, LED lamp, Fresnel lens 13, described Fresnel lens 13 is left and right two. When someone enters the early warning range of the monitor, the infrared rays emitted by the person pass through the Fresnel lens 13 and enter the monitor to be sensed by the detector and send a radio frequency signal to the external radio frequency transmitter through the built-in radio frequency transmitter (not shown in the figure). A WIFI host (not shown in the figure), the WIFI host is transcoded and forwarded to the mobile terminal.

Described Fresnel lens 13 is fixed on the support frame 11, and the shape of described support frame 11 is similar to spectacle frame, and there is a connecting bridge 111 in the middle, and the matching mode of described Fresnel lens 13 and support frame 11 is similar to the eyeglass and picture frame. Cooperate, the farthest two ends of the support frame 11 are movably connected with the housing 1, the connecting bridge 111 is connected with the housing 1 through screws 12, and the connecting bridge 111 is arranged between the housing 1 An elastic rubber ring 121 , the screw 12 passes through the elastic rubber ring 121 . When adjusting the angles of the two Fresnel lenses, you only need to rotate the screw 12, and when the screw 12 is tightened, the connecting bridge 111 is pressed to the housing (1) so that the two Fresnel lenses 13 mirror each other The angle decreases, and vice versa increases.

The housing 1 is provided with a trigger 2, and the trigger 2 is composed of a trigger body 311 and a button 211, and the button 211 is inserted into the narrow slit 5 inside the trigger body 311 through a strut 23. The overall shape of the slit 5 is similar to two rectangular deep pits overlapping on one side. A keyback groove 51 is arranged at the corner of the slit 5. The position of the keyback groove 51 is only used as a temporary transfer station for the button 211. The button 211 can be moved like a "Huarongdao" toy. This design facilitates the change of the key position and prevents strangers from remembering the correct key position.

The key 211 is formed by fixedly connecting the key surface 24 and the support rod 23, and a metal ring 231 is interference-fitted on the support rod 23. The key 211 is divided into two types, one is type A, and the other is type A. One is Class B, wherein the metal ring 231 of Class A is longer than the metal ring 231 of Class B, and the number of keys of Class A is 1, and the number of keys of Class B is 5, and the metal ring 231 acts as The function of conducting electricity and reducing friction: when the button moves along the slit 5 , the metal ring 231 slides and rubs against the internal contact surface of the trigger body 311 .

The trigger body 311 includes an upper guide 31, an insulating sheet 32, a lower guide 33, an elastic body 34 and an insulator 35 stacked in sequence, and two cuboids 36 are fixed on the insulator 35, and the cuboids 36 and the upper The guide sheet 31 , the insulating sheet 32 , the lower guide sheet 33 and the elastic body 34 jointly form the slit 5 . The insulating sheet 32 can effectively isolate the current communication between the upper guide sheet 31 and the lower guide sheet 33 in a natural state, and can keep an appropriate distance between the upper guide sheet 31 and the lower guide sheet 33 .

Two rows of four elastic metal strips 41 are distributed on one side of the upper guide piece 31. The elastic metal strips 41 are not connected to each other, and the disconnection position is just at the intersection of each path of the narrow slit 5. Rows of metal strips 41 belong to different circuits. In each group of circuits, the elastic metal strip 41 at the far left is connected to the positive signal, and the elastic metal strip 41 at the rightmost is connected to the negative signal; the inner edge of the lower guide piece 33 is wrapped with a circle of elastic The metal sheet 42, the elastic metal sheet 42 is externally connected to the positive signal.

The metal ring 231 of the button 211 of the A type and the B type is in contact with the elastic metal sheet 42 in a natural state, and only contacts with the elastic metal strip 41 to form two independent communication circuits. When the B-type key is pressed, the corresponding circuit is disconnected, and the trigger body 311 detects that the circuit is interrupted, and immediately sends an immediate alarm command to the network host through the built-in radio frequency transmitter (not shown in the figure), and then the network host immediately Send an alarm signal to the mobile terminal to notify the monitor; when the A-type button is correctly pressed, the metal ring 231 is still connected to the elastic metal strip 41, and the lower end of the metal ring 231 on the A-type button touches the The elastic metal sheet 42 on the lower guide piece 33 makes the elastic metal sheet 42 and the elastic metal strip 41 form a path, and the trigger body 311 passes the built-in radio frequency transmitter (Fig. (not shown above) sends a termination alarm instruction to the network host, and the network host cancels the alarm signal after receiving the instruction.

Claims (6)

1. a kind of long-range pyroelectric sensing supervising device, including housing（1）, the housing（1）It is upper to be mounted with trigger respectively （2）, LED, Fresnel Lenses（13）, it is characterised in that：The Fresnel Lenses（13）For left and right two, the Fresnel is saturating Mirror（13）It is fixed on stand frame（11）On, the stand frame（11）The similar spectacle-frame of shape, there is a connecting bridge centre（111）, The Fresnel Lenses（13）With stand frame（11）The similar eyeglass of fit system and picture frame cooperation, the stand frame（11）Most Remote two ends and the housing（1）It is flexibly connected, the connecting bridge（111）By screw（12）With the housing（1）Connection, it is described Connecting bridge（111 with the housing（1）Between an elastic rubber ring is set（121）, the screw（12）Through the elastic caoutchouc Circle（121）.

2. a kind of long-range pyroelectric sensing supervising device as claimed in claim 1, it is characterised in that：The trigger（2）By Trigger body（311）And button（211）Composition, the button（211）It is inserted in trigger body（311）Internal narrow slit（5） In, the narrow slit（5）Similar two overlaps on one side of global shape rectangle dell, the narrow slit（5）Corner sets one Backspace key groove（51）, the button（211）Can be moved as " ' Huarongdao ' " toy.

3. a kind of long-range pyroelectric sensing supervising device as claimed in claim 2, it is characterised in that：The button（211）By Keyboard（24）And pole（23）It is formed by fixedly connecting, the pole（23）Upper interference fit has a circle becket（231）, it is described to press Key（211）It is divided into two kinds, one kind is A classes, another kind is B classes, wherein the becket of A classes（231）Than the metal of B class Ring（231）It is long, and A classes quantity is 1, the quantity of B classes is 5.

4. a kind of long-range pyroelectric sensing supervising device as claimed in claim 2, it is characterised in that：The trigger body （311）Including upper guide card（31）, insulating trip（32）, lower guide card（33）, elastomer（34）And insulator（35）It is sequentially overlapped, it is described Insulator（35）On be fixed with two cuboids（36）, the cuboid（36）With the upper guide card（31）, the insulating trip （32）, the lower guide card（33）With the elastomer（34）It is collectively forming the narrow slit（5）, in the narrow slit（5）Corner location Backspace key groove is set.

5. a kind of long-range pyroelectric sensing supervising device as claimed in claim 3, it is characterised in that：The upper guide card（31）One EDS maps have each 4 resilient metal strips of two rows（41）, the resilient metal strip（41）Between be not attached to each other, open position is just Positioned at the narrow slit（5）Each intersection in path, two row's bonding jumpers（41）Adhere to different circuits separately, high order end institute in every group of circuit State resilient metal strip（41）Connection positive signal, resilient metal strip described in low order end（41）Connection negative signal；The lower guide card （33）Inner ring edge wrap one encloses elastic sheet metal（42）, the elastic sheet metal（42）External positive signal.

6. a kind of long-range pyroelectric sensing supervising device as claimed in claim 3, it is characterised in that：A classes and button described in B classes （211）The becket（231）In its natural state only with the upper guide card（31）In the resilient metal strip（41）Even Connect；Button described in A classes under nature（211）The becket（231）Lower surface and the elastic sheet metal（42）Upper end The distance in face is less than button（211）Impulse stroke, button described in A classes（211）The becket（231）Upper surface and described Resilient metal strip（41）The distance of lower surface is more than the button（211）Impulse stroke；Button described in B classes under nature （211）The becket（231）Lower surface and the elastic sheet metal（42）The distance of upper surface is more than button（211）Work Make stroke, button described in B classes（211）The becket（231）Upper surface and the resilient metal strip（41）Lower surface away from From less than the button（211）Impulse stroke.