CN217426229U - Fence perimeter automatic alarm device - Google Patents

Fence perimeter automatic alarm device Download PDF

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Publication number
CN217426229U
CN217426229U CN202221397074.XU CN202221397074U CN217426229U CN 217426229 U CN217426229 U CN 217426229U CN 202221397074 U CN202221397074 U CN 202221397074U CN 217426229 U CN217426229 U CN 217426229U
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unit
alarm device
infrared
fence
signal
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CN202221397074.XU
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Inventor
刘先桃
袁许波
刘锦松
方法宁
许创健
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Shenzhen Sequoia Intelligent Human Settlement Service Co ltd
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Shenzhen Sequoia Intelligent Human Settlement Service Co ltd
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Abstract

The utility model relates to an electronic fence perimeter autoalarm, the on-line screen storage device comprises a base, bracing piece and rail board, base fixed mounting is in ground, the bracing piece includes mobile jib and vice pole, the equal fixed connection of mobile jib and vice pole is on the base, the one end fixed connection of rail board is in the mobile jib, the other end fixed connection of rail board is in vice pole, the top fixed mounting of mobile jib has alarm device, fixed mounting has infrared transmitter on the mobile jib, fixed mounting has infrared receiver on the vice pole, fixed mounting has the pyroelectric sensor who is used for detecting that there is no personnel to be close to the rail board on the rail board, alarm device shop connects in infrared receiver and pyroelectric sensor, when personnel are close to the rail board, alarm device circular telegram sends alarm signal in advance. This application has the guard effect who improves fence, strengthens fence's warning function's in advance effect.

Description

Fence perimeter automatic alarm device
Technical Field
The application relates to the technical field of fences, in particular to an automatic alarming device for the perimeter of an electronic fence.
Background
The electronic fence mainly comprises an electronic fence host and a front-end detection fence, wherein the electronic fence host is usually installed outdoors along the original fence, such as a brick wall, a cement wall or an iron fence, the electronic fence host generates and receives a high-voltage pulse signal, can generate an alarm signal when the front-end detection fence is in a net touching state, a short circuit state or a circuit breaking state, and transmits the alarm signal to a rear-end control center through signal transmission equipment.
Along with the development of security protection technique, can build the fence on the enclosure of more and more residential areas for the theftproof, current fence is through being provided with the warning sign in order playing suggestion early warning effect on fence, and fence's warning function nature in advance is relatively poor, and fence's precaution effect is relatively poor, consequently, has certain improvement space.
SUMMERY OF THE UTILITY MODEL
In order to improve the guard effect of fence, reinforcing fence's pre-alarm performance, this application provides a fence perimeter autoalarm.
The application provides an electronic fence perimeter autoalarm adopts following technical scheme:
the utility model provides an electronic fence perimeter autoalarm, includes base, bracing piece and fence board, base fixed mounting is in ground, the bracing piece includes mobile jib and vice pole, the equal fixed connection of mobile jib and vice pole is on the base, the one end fixed connection of fence board is in the mobile jib, the other end fixed connection of fence board is in vice pole, the top fixed mounting of mobile jib has alarm device, fixed mounting has infrared transmitter on the mobile jib, fixed mounting has infrared receiver on the vice pole, fixed mounting has the pyroelectric sensor who is used for detecting that there is nobody to be close to the fence board on the fence board, alarm device electricity connect in infrared receiver and pyroelectric sensor, when personnel are close to during the fence board, alarm device circular telegram sends alarm signal in advance.
By adopting the technical scheme, the electronic fence is fixedly arranged on the ground through the base, the fence plate is fixedly connected between the main rod and the auxiliary rod to form the electronic fence, the infrared emitter on the main rod emits infrared light signals, the infrared receiver on the auxiliary rod receives the infrared light signals emitted by the infrared emitter, when a person climbs over the electronic fence, the infrared light signals emitted by the infrared emitter on the main rod are blocked and cannot be emitted to the infrared receiver on the auxiliary rod, and when the infrared receiver cannot receive the infrared light signals, the alarm device is powered on to start to emit a pre-alarm signal; pyroelectric sensor on the fence board can detect whether there is the personnel to be close to the fence, when personnel are close to the fence, through pyroelectric sensor output sensing signal to alarm device, makes alarm device circular telegram start, sends alarm signal in advance, makes fence have alarm function in advance, improves fence's the effect of guard against, strengthens fence's alarm function in advance.
Optionally, a solar panel is fixedly mounted at the top of the auxiliary rod, and the alarm device is electrically connected to the solar panel.
Through adopting above-mentioned technical scheme, realize providing operating voltage for alarm device through the solar panel on the auxiliary rod, adopt the solar energy power supply, make fence have green effect.
Optionally, one side that vice pole was kept away from to the mobile jib is provided with the dwang, one side that the mobile jib was kept away from to vice pole is provided with the fixing base that uses with the dwang cooperation, the dwang is pegged graft in the fixing base, works as when the dwang was inserted in the fixing base, the dwang can rotate around the axis of fixing base in the fixing base.
Through adopting above-mentioned technical scheme, through being provided with dwang and fixing base, insert the dwang on the fence mobile jib fixing base on the vice pole of adjacent fence, realize linking together two adjacent fences, and then can prolong fence's protective scope, when the dwang inserts the fixing base, the dwang can be at the fixing base internal rotation, makes two adjacent fences can the relative rotation, realizes adjusting the angle that two adjacent fences formed.
Optionally, the alarm device is electrically connected with a human body infrared sensing circuit for controlling the alarm device to start, and the human body infrared sensing circuit comprises an infrared detection unit, a pyroelectric sensing unit, a judgment unit and a control unit; infrared detecting element is used for detecting whether there is the personnel touching the fence and exports infrared detected signal, heat release electric induction unit is used for detecting whether there is the personnel to be close to the fence and export the sensing signal, the input of judgement unit is coupled respectively in infrared detecting element and heat release electric induction unit, works as when judgement unit receives sensing signal or infrared detected signal, or receives sensing signal and infrared detected signal, judgement unit output judgement signal to the control unit, the input of control unit is coupled in judgement unit in order to receive judgement signal, the output of control unit is coupled in alarm device's power supply circuit in order to export control signal to alarm device, works as when alarm device receives control signal, alarm device circular telegram starts work and sends out warning signal in advance to play the warning effect.
Through adopting above-mentioned technical scheme, can real-time supervision have the personnel to cross touching the fence through infrared detecting element, when personnel are touching the fence, infrared detecting element outputs infrared detection signal, when personnel are close to the fence, pyroelectric induction element outputs sensing signal, when judging unit received infrared detection signal or sensing signal, perhaps when receiving infrared detection signal and sensing signal, judging unit output judgement signal to the control unit, the control unit receives behind the judgement signal output control signal to alarm device's power supply circuit, alarm device circular telegram start-up work, make alarm device send alarm signal in advance, make the fence play the early warning effect.
Optionally, the infrared detection unit includes infrared emitter and infrared receiver, infrared emitter includes emitting diode D, infrared receiver includes photoelectric switch tube Q1, infrared emitting diode D and the coupling of photoelectric switch tube Q1, emitting diode D's positive pole is coupled in the power, emitting diode D's negative pole ground connection, photoelectric switch tube Q1's collecting electrode is coupled in the power, photoelectric switch tube Q1's emitter ground connection, photoelectric switch tube Q1's collecting electrode is coupled in the judgement unit.
Through adopting above-mentioned technical scheme, when personnel cross the fence, the infrared light that the infrared emitter on the mobile jib sent can't be received by the infrared receiver on the sublance, and the infrared optical signal that emitting diode D sent is cut off by the personnel of crossing, and photoelectric switch pipe Q1 is the off-state, and photoelectric switch pipe Q1's collecting electrode output high level, infrared detection unit output infrared detection signal to the judgement unit, realize the infrared detection function.
Optionally, the pyroelectric sensing unit includes a pyroelectric sensor, the pyroelectric sensor includes a sensing end, a power end and an output end, a fresnel lens is installed on the sensing end of the pyroelectric sensor, the power end of the pyroelectric sensor is coupled to the power supply, and the output end of the pyroelectric sensor is coupled to the determination unit.
Through adopting above-mentioned technical scheme, the end of induction through pyroelectric sensor detects that there is the personnel that is close to the fence and exports the sensing signal and export to the judgement unit, and when personnel were close to the fence, pyroelectric sensor's output high level was installed fresnel lens through the end of induction at pyroelectric sensor, and reinforcing pyroelectric sensor's sensitivity makes the fence can detect the personnel that the response is close to the fence more accurately.
Optionally, the determining unit includes a first input end and a second input end, the first input end is coupled to the pyroelectric sensing unit to receive the sensing signal, the second input end is coupled to the infrared detecting unit to receive the infrared detecting signal, and an output end of the determining unit is coupled to the control unit.
By adopting the technical scheme, the induction signal is received through the first input end, the infrared detection signal is received through the second input end, when the induction signal or the infrared detection signal is received by the judgment unit, or the induction signal and the infrared detection signal are received, the output end of the judgment unit outputs a high level, and the judgment unit outputs the judgment signal to the control unit.
Optionally, the control unit includes an NPN type transistor Q2 and a relay KM1, a base of the transistor Q2 is coupled to the output end of the determining unit to receive the determination signal, an emitter of the transistor Q2 is grounded, a collector of the transistor Q2 is coupled to the power source after being connected in series with the relay KM1, the relay KM1 includes a normally open contact switch KM1-1, and the normally open contact switch KM1-1 is connected in series with a power supply loop of the alarm apparatus.
By adopting the technical scheme, when the control unit receives the judgment signal, the base electrode of the NPN type triode Q2 inputs high level, the triode Q2 is in a conducting state, the coil of the relay KM1 is electrified, the normally open electric shock switch KM1-1 is electrified and closed, the power supply loop of the alarm device is conducted, the alarm device is electrified and started to work, and a pre-alarm signal is output, so that the electronic fence has a pre-alarm function.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when a person gets close to the electronic fence, the pyroelectric sensor outputs a sensing signal to the alarm device, so that the alarm device is powered on and started to send a pre-alarm signal, and the electronic fence has a pre-alarm function;
2. the solar power generation panel on the auxiliary rod is used for supplying working voltage to the alarm device, and solar power is used for supplying power, so that the electronic fence has an environment-friendly effect;
3. through being provided with dwang and fixing base, insert the dwang on the fence mobile jib fixing base on the vice pole of adjacent fence, realize linking together two adjacent fences, and then can prolong fence's protective scope, when the dwang inserts the fixing base, the dwang can be at the fixing base internal rotation, makes two adjacent fences can the relative rotation, realizes adjusting the angle that two adjacent fences formed.
Drawings
Fig. 1 is a schematic structural diagram of an automatic alarm device for the perimeter of an electronic fence according to an embodiment of the present application.
Fig. 2 is a circuit diagram of a human body infrared sensing circuit of an automatic alarm device for the perimeter of an electronic fence according to an embodiment of the present application.
Description of reference numerals: 1. a base; 2. a support bar; 21. a main rod; 211. an infrared emitter; 212. rotating the rod; 22. an auxiliary rod; 221. an infrared receiver; 222. a fixed seat; 223. a solar power panel; 3. a fence panel; 31. a pyroelectric sensor; 4. an alarm device; 41. an alarm light; 42. a buzzer; 5. an infrared detection unit; 6. a pyroelectric sensing unit; 7. a judgment unit; 8. a control unit.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses fence perimeter autoalarm.
Referring to fig. 1, an automatic alarm device for the perimeter of an electronic fence comprises a base 1, a supporting rod 2 and a fence plate 3, wherein the base 1 is fixedly installed on the ground, the supporting rod 2 is fixedly connected with the base 1, the supporting rod 2 comprises a main rod 21 and an auxiliary rod 22, and the fence plate 3 is fixedly connected with the main rod 21 and the auxiliary rod 22. The alarm device 4 is fixedly mounted on the top of the main rod 21, specifically, the alarm device 4 comprises an alarm lamp 41 and a buzzer 42, the solar power generation panel 223 is fixedly mounted on the top of the auxiliary rod 22, and the alarm lamp 41 and the buzzer 42 are electrically connected to the solar power generation panel 223.
An infrared emitter 211 is fixedly installed on one side of the main rod 21 close to the auxiliary rod 22, and the infrared emitter 211 is used for emitting an infrared light signal. An infrared receiver 221 is fixedly mounted on one side of the secondary rod 22 close to the primary rod 21, and the infrared receiver 221 is used for receiving infrared light emitted by the infrared emitter 211. The top fixed mounting of fence board 3 has pyroelectric sensor 31, and pyroelectric sensor 31 is used for detecting the response and has or not personnel to be close to the fence. The alarm lamp 41 and the buzzer 42 are both in communication connection with the infrared receiver 221 and the pyroelectric sensor 31, when a person approaches the electronic fence, the alarm lamp 41 is powered on to send out a stroboscopic alarm lamp 41 signal, and the buzzer 42 is powered on to start to send out alarm sound.
The rotating rod 212 is disposed on one side of the main rod 21 away from the auxiliary rod 22, the fixing seat 222 is disposed on one side of the auxiliary rod 22 away from the main rod 21, the rotating rod 212 is inserted into the fixing seat 222, and when the rotating rod 212 is inserted into the fixing seat 222, the rotating rod 212 can rotate around the axis of the fixing seat 222 in the fixing seat 222. Be provided with fixing device on dwang 212 and the fixing base 222, fixing device includes fixing bolt, set up on the fixing base 222 with the screw hole of fixing bolt looks adaptation, fixing bolt passes the screw hole and stretches into to the fixing base 222 in, screw up fixing bolt, make fixing bolt stretch into the one end of fixing base 222 and support tightly in dwang 212, the rotation of restriction dwang 212 makes two adjacent fence fixed connection.
Referring to fig. 2, the alarm device 4 is electrically connected to a human body infrared sensing circuit for controlling the alarm device 4 to start, and the human body infrared sensing circuit includes an infrared detection unit 5, a pyroelectric sensing unit 6, a determination unit 7 and a control unit 8.
The infrared detection unit 5 is used for detecting whether a person touches the electronic fence and outputting an infrared detection signal, the infrared detection unit 5 includes a light emitting diode D and an NPN-type photoelectric switch tube Q1, the light emitting diode D is specifically an infrared emitter 211, the photoelectric switch tube Q1 is specifically an infrared receiver 221, the infrared light emitting diode D is coupled with a photoelectric switch tube Q1, the anode of the light emitting diode D is connected in series with a first resistor R1 and then coupled to a power supply, the cathode of the light emitting diode D is grounded, the collector of the photoelectric switch tube Q1 is connected in series with a second resistor R2 and then coupled to the power supply, the emitter of the photoelectric switch tube Q1 is grounded, and the connection node between the collector of the photoelectric switch tube Q1 and the second resistor R2 is coupled to the determination unit 7.
The pyroelectric sensing unit 6 is used for detecting whether there is a person to be close to the electronic fence and output the sensing signal, the pyroelectric sensing unit 6 includes the pyroelectric sensor 31, the pyroelectric sensor 31 includes three pin, the first pin of pyroelectric sensor 31 is the power end, the second pin of pyroelectric sensor 31 is the output, install fresnel lens on the response end of pyroelectric sensor 31, the first pin of pyroelectric sensor 31 is coupled in the power, the second pin of pyroelectric sensor 31 is coupled in the judgement unit 7, the third pin ground connection of pyroelectric sensor 31.
The input end of the determination unit 7 is coupled to the infrared detection unit 5 and the pyroelectric sensing unit 6, respectively, and the output end of the determination unit 7 is coupled to the control unit 8. The determining unit 7 includes a first input terminal, a second input terminal, and a signal output terminal, the first input terminal of the determining unit 7 is coupled to the second pin of the pyroelectric sensor 31, the second input terminal of the determining unit 7 is coupled to a connection node between the collector of the photoelectric switch Q1 and the second resistor R2, and the output terminal of the determining unit 7 is coupled to the control unit 8.
Specifically, when the determination unit 7 receives the sensing signal or the infrared detection signal, or receives the sensing signal and the infrared detection signal, the determination unit 7 outputs the determination signal to the control unit 8.
The input end of the control unit 8 is coupled to the determination unit 7, and the output end of the control unit 8 is coupled to the power supply loop of the alarm device 4. The control unit 8 comprises an NPN type triode Q2 and a relay KM1, wherein the base electrode of the triode Q2 is coupled to the output end of the judging unit 7 to receive the judging signal, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is coupled to the power supply after being connected with the relay KM1 in series, the relay KM1 comprises a normally open contact switch KM1-1, and the normally open contact switch KM1-1 is connected with the power supply loop of the alarm device 4 in series.
The implementation principle of the automatic alarm device for the electronic fence perimeter in the embodiment of the application is as follows:
the base 1 is fixedly arranged on the bottom surface, the main rod 21 and the auxiliary rod 22 are both fixedly connected to the base 1, and the fence plate 3 is fixedly arranged between the main rod 21 and the auxiliary rod 22 to form an electronic fence; the top of the main rod 21 is fixedly provided with the alarm device 4, the infrared emitter 211 on one side of the main rod 21 close to the auxiliary rod 22 emits an infrared light signal, and the infrared receiver 221 on one side of the auxiliary rod 22 close to the main rod 21 receives the infrared light emitted by the infrared emitter 211; the pyroelectric sensor 31 at the top of the fence plate 3 detects whether people approach the electronic fence in real time;
the rotating rod 212 on the main rod 21 of the electronic fence is inserted into the fixing seat 222 on the auxiliary rod 22 of the adjacent electronic fence, so that the two adjacent electronic fences are connected, the rotating rod 212 can rotate in the fixing seat 222, the two adjacent electronic fences can rotate relatively, and the angle formed by the two adjacent electronic fences is adjusted.
When a person approaches the electronic fence or touches or crosses the electronic fence, the infrared light emitted by the infrared emitter 211 on the main rod 21 cannot be received by the infrared receiver 221 on the auxiliary rod 22, the infrared light signal emitted by the light emitting diode D of the infrared detection unit 5 is blocked by the crossing person, the photoelectric switch tube Q1 is in an off state, the collector of the photoelectric switch tube Q1 outputs a high level, and the infrared detection unit 5 outputs an infrared detection signal to the judgment unit 7; the induction end of the pyroelectric sensor 31 on the fence board 3 detects that a person approaches, the output end of the pyroelectric sensor 31 outputs a high level, the pyroelectric induction unit 6 outputs an induction signal to the judgment unit 7, when the judgment unit 7 receives an induction signal or an infrared detection signal, or receives an induction signal and an infrared detection signal, the output end of the judgment unit 7 outputs a high level, the judgment unit 7 outputs a judgment signal to the control unit 8, the base of the NPN type triode Q2 of the control unit 8 inputs a high level, the triode Q2 is in a conduction state, the coil of the relay KM1 is electrified, the normally open electric shock switch KM1-1 is electrified and closed, the power supply loop of the alarm device 4 is conducted, the alarm lamp 41 is lightened to send a stroboscopic alarm lamp 41 signal, and the buzzer 42 is electrified and started to send an alarm sound.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An automatic alarm device for the perimeter of an electronic fence is characterized in that: including base (1), bracing piece (2) and fence board (3), base (1) fixed mounting is in ground, bracing piece (2) include mobile jib (21) and vice pole (22), mobile jib (21) and vice pole (22) equal fixed connection are on base (1), the one end fixed connection of fence board (3) is in mobile jib (21), the other end fixed connection of fence board (3) is in vice pole (22), the top fixed mounting of mobile jib (21) has alarm device (4), fixed mounting has infrared transmitter (211) on mobile jib (21), fixed mounting has infrared receiver (221) on vice pole (22), fixed mounting has on fence board (3) to be used for detecting has nobody to be close to pyroelectric sensor (31) of fence board (3), alarm device (4) electricity connect in infrared receiver (221) and pyroelectric sensor (31), when a person approaches the fence board (3), the alarm device (4) is electrified to send out a pre-alarm signal.
2. An electronic fence perimeter autoalarm as claimed in claim 1, wherein: the top of the auxiliary rod (22) is fixedly provided with a solar power generation panel (223), and the alarm device (4) is electrically connected to the solar power generation panel (223).
3. An electronic fence perimeter autoalarm as claimed in claim 1, wherein: one side that vice pole (22) were kept away from to mobile jib (21) is provided with dwang (212), one side that vice pole (22) were kept away from mobile jib (21) is provided with fixing base (222) with dwang (212) cooperation use, dwang (212) are pegged graft in fixing base (222), work as when dwang (212) are inserted in fixing base (222), dwang (212) can rotate around the axis of fixing base (222) in fixing base (222).
4. An electronic fence perimeter autoalarm as claimed in claim 1, wherein: the alarm device (4) is electrically connected with a human body infrared sensing circuit for controlling the alarm device (4) to start, and the human body infrared sensing circuit comprises an infrared detection unit (5), a pyroelectric sensing unit (6), a judgment unit (7) and a control unit (8); the electronic fence comprises an infrared detection unit (5), a pyroelectric induction unit (6), a judgment unit (7), a control unit (8), a power supply circuit and an alarm device (4), wherein the infrared detection unit (5) is used for detecting whether a person touches the electronic fence and outputting an infrared detection signal, the pyroelectric induction unit (6) is used for detecting whether a person approaches the electronic fence and outputting an induction signal, the input end of the judgment unit (7) is respectively coupled with the infrared detection unit (5) and the pyroelectric induction unit (6), when the judgment unit (7) receives the induction signal or the infrared detection signal or receives the induction signal and the infrared detection signal, the judgment unit (7) outputs a judgment signal to the control unit (8), the input end of the control unit (8) is coupled with the judgment unit (7) to receive the judgment signal, the output end of the control unit (8) is coupled with the power supply circuit of the alarm device (4) to output the control signal to the alarm device (4), and when the alarm device (4) receives the control signal, the alarm device (4) is electrified to start working and sends out a pre-alarm signal so as to play a role in warning.
5. An electronic fence perimeter autoalarm as in claim 4 wherein: the infrared detection unit (5) includes infrared transmitter (211) and infrared receiver (221), infrared transmitter (211) includes emitting diode D, infrared receiver (221) includes photoelectric switch pipe Q1, infrared emitting diode D and photoelectric switch pipe Q1 coupling, emitting diode D's positive pole is coupled in the power, emitting diode D's negative pole ground connection, photoelectric switch pipe Q1's collecting electrode is coupled in the power, photoelectric switch pipe Q1's emitter ground connection, photoelectric switch pipe Q1's collecting electrode is coupled in judgement unit (7).
6. An electronic fence perimeter autoalarm as in claim 4 wherein: the pyroelectric sensing unit (6) comprises a pyroelectric sensor (31), the pyroelectric sensor (31) comprises a sensing end, a power end and an output end, a Fresnel lens is mounted on the sensing end of the pyroelectric sensor (31), the power end of the pyroelectric sensor (31) is coupled to the power supply, and the output end of the pyroelectric sensor (31) is coupled to the judging unit (7).
7. An electronic fence perimeter autoalarm as in claim 4 wherein: the judging unit (7) comprises a first input end and a second input end, the first input end is coupled to the pyroelectric sensing unit (6) to receive sensing signals, the second input end is coupled to the infrared detection unit (5) to receive infrared detection signals, and the output end of the judging unit (7) is coupled to the control unit (8).
8. An electronic fence perimeter autoalarm as claimed in claim 7, wherein: the control unit (8) comprises an NPN type triode Q2 and a relay KM1, wherein the base electrode of the triode Q2 is coupled to the output end of the judging unit (7) to receive the judging signal, the emitter electrode of the triode Q2 is grounded, the collector electrode of the triode Q2 is coupled to a power supply after being connected with the relay KM1 in series, the relay KM1 comprises a normally open contact switch KM1-1, and the normally open contact switch KM1-1 is connected with a power supply loop of the alarm device (4) in series.
CN202221397074.XU 2022-06-06 2022-06-06 Fence perimeter automatic alarm device Active CN217426229U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202221397074.XU CN217426229U (en) 2022-06-06 2022-06-06 Fence perimeter automatic alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221397074.XU CN217426229U (en) 2022-06-06 2022-06-06 Fence perimeter automatic alarm device

Publications (1)

Publication Number Publication Date
CN217426229U true CN217426229U (en) 2022-09-13

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ID=83171366

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202221397074.XU Active CN217426229U (en) 2022-06-06 2022-06-06 Fence perimeter automatic alarm device

Country Status (1)

Country Link
CN (1) CN217426229U (en)

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