CN215006857U - Museum security monitoring system - Google Patents
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- CN215006857U CN215006857U CN202121465211.4U CN202121465211U CN215006857U CN 215006857 U CN215006857 U CN 215006857U CN 202121465211 U CN202121465211 U CN 202121465211U CN 215006857 U CN215006857 U CN 215006857U
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Abstract
The application relates to the technical field of security monitoring, in particular to a museum security monitoring system which comprises an access control module, a human body detection module, a monitoring module and a security integrated controller, wherein when the human body detection module detects that a person is at a door plate, a human body detection signal is output, the security integrated controller controls the access control module to execute door opening action after receiving the human body detection signal, and at the moment, the person can come in and go out of the museum; and meanwhile, the security and protection integrated controller can also control the monitoring module to photograph people at the door plate. When the museum is stolen or artificially damaged, the guard can check the people entering the museum according to the photos acquired by the monitoring module, find the people damaging the museum and reduce the loss of the museum.
Description
Technical Field
The application relates to the technical field of security monitoring, in particular to a museum security monitoring system.
Background
At present, a monitoring system becomes a new security construction hotspot, and an effective monitoring management system can ensure that security conditions are safe day by day, and emergency events can be responded in time, so that management departments find problems at the first time, and response measures, emergency plans and the like are provided. The museum is used as a social public institution for classical collection and cultural heritage display, once artificial damage and theft occur, loss is immeasurable, so that security construction in the museum is very important, and security systems of some museums are mainly monitored by a camera at present.
Aiming at the related technologies, the inventor considers that the design of a security system which is mainly relied on by the museum at present is simpler, so that the security work of the museum has hidden troubles.
SUMMERY OF THE UTILITY MODEL
In order to improve the phenomenon that hidden danger exists in the safety precaution work of museum, the application provides a museum security monitoring system.
A museum security monitoring system, comprising: the system comprises an access control module, a human body detection module, a monitoring module and a security integrated controller;
the human body detection module is used for detecting the personnel condition at the door panel so as to output a human body detection signal;
the security and protection integrated controller is connected with the human body detection module and used for receiving the human body detection signal and controlling the entrance guard module to execute door opening action and control the monitoring module to execute photographing action based on the human body detection signal.
By adopting the technical scheme, when the human body detection module detects that people exist at the door panel, a human body detection signal is output, the security integrated controller can control the access control module to execute door opening action after receiving the human body detection signal, and people can go in and out of the museum; and meanwhile, the security and protection integrated controller can also control the monitoring module to photograph people at the door plate. When the museum is stolen or artificially damaged, the guard can check the people entering the museum according to the photos acquired by the monitoring module, find the people damaging the museum and reduce the loss of the museum.
Optionally, the alarm device further comprises an alarm module, wherein the alarm module comprises an alarm probe and an alarm actuator;
the alarm probe is used for detecting the door panel vibration condition so as to output a door panel detection signal;
the security and protection integrated controller is connected with the alarm probe and used for receiving the door panel detection signal and controlling the alarm actuator to give an alarm based on the door panel detection signal.
Through adopting above-mentioned technical scheme, when someone destroys the human detection module, the security protection centralized control ware can not receive human detection signal this moment, the control module does not carry out the action of shooing, the entrance guard module does not carry out the action of opening the door, if violence destroys door plant or entrance guard module this moment and tries to get into in the museum, alarm probe can detect the door plant vibrations and export the door plant and survey the signal, the security protection centralized control ware receives the door plant and surveys in the signal can judge someone illegally break into the museum, the security protection centralized control ware can control the alarm executor and send the warning this moment. The staff can arrive at the site in time after receiving the alarm, so that the phenomenon of illegal intrusion into the museum is prevented, and the loss of the museum is reduced.
Optionally, the human body detection module comprises an infrared emitting piece and an infrared receiving piece, and the infrared emitting piece and the infrared receiving piece are symmetrically arranged on two sides of the door panel.
Through adopting above-mentioned technical scheme, infrared transmitter can be to infrared receiver transmission multi-beam infrared signal, and when infrared receiver can not receive infrared signal, human detection module can judge that someone is located between infrared transmitter and the infrared receiver, outputs human detection signal.
Optionally, the infrared emitting piece and the infrared receiving piece are connected with a supporting seat at one end close to the ground, and a guide rod is connected between the supporting seats.
Through adopting above-mentioned technical scheme, infrared transmitter and infrared receiver all are connected subaerial through the supporting seat, and two supporting seats are located the both ends of guide bar, and the guide bar can inject the distance between infrared transmitter and the infrared receiver, has reduced infrared signal that the distance is too far to lead to between infrared transmitter and the infrared receiver and can't be received by infrared receiver phenomenon, has improved the accuracy of detection.
Optionally, the two support seats are respectively provided with a first mounting groove for inserting the infrared emitting element and the infrared receiving element, the support seats are further provided with mounting holes for inserting the end parts of the guide rods, and the mounting holes are communicated with the first mounting grooves;
the infrared transmitting piece and the infrared receiving piece are provided with sliding grooves in the side faces along the direction perpendicular to the guide rod, and elastic pieces used for clamping the end portions of the guide rod are mounted on two inner side walls opposite to the sliding grooves.
Through adopting above-mentioned technical scheme, can reduce after the elastic sheet clamping guide bar tip that infrared emission piece or infrared receiver and first mounting groove take place relative pivoted phenomenon for infrared emission piece can aim at infrared receiver, and the infrared signal that infrared emission piece sent can be received by infrared receiver, has further improved the accuracy that detects.
Optionally, the first mounting groove inside wall is provided with the gib block along the direction perpendicular with the gib block, the gib block is located gib block and is close to ground one side, gib block and spout sliding connection.
Through adopting above-mentioned technical scheme, when installation infrared emission spare and infrared receiver, imbed the mounting hole respectively with the both ends of guide bar in, make two supporting seat connection as an organic whole, then align spout and gib block, infrared emission spare and infrared receiver of sliding along the gib block, the elastic sheet of up to the spout lateral wall contacts with the tip of guide bar, the gib block can be convenient for the staff and aim at spout and guide bar, make the elastic sheet can with the joint of guide bar tip.
Optionally, the human body detection module includes a pressure detection unit, and the pressure detection unit includes:
a pressure detection circuit for detecting the pressure on the ground at the door panel and outputting a first voltage V1；
A threshold circuit for outputting a threshold voltage V0；
A comparator having a non-inverting input connected to the pressure detection circuit and an inverting input connected to the threshold circuit for comparing the first voltage V1And a threshold voltage V0If the first voltage V is larger than the second voltage V1Greater than a threshold voltage V0Then, a human detection signal is output.
Through adopting above-mentioned technical scheme, when the pressure that door plant department ground received changes, pressure detection circuit can detect pressure and export first voltage V1The comparator can be used for comparing the first voltage V1And a threshold voltage V0Comparing when the first voltage V is higher than the second voltage1Above threshold voltage V0And the pressure detection unit can judge that the door plate is occupied at the moment and output a human body detection signal. The pressure detection circuit can also detect that the pressure changes and output the first voltage V when the cat or the dog or other animals are at the door panel1Setting a comparator to a first voltage V1And a threshold voltage V0The comparison can reduce the phenomenon of misjudgment of the pressure detection unit.
Optionally, the human body detection module further includes a delay circuit, and the delay circuit includes a coil KM, a normally open contact KM-1, a 555 timer, and an NPN triode Q1;
the input end of the 555 timer is connected with the output end of the comparator, and the output end of the 555 timer is connected with the base electrode of an NPN triode Q1;
a collector of the NPN triode Q1 is connected with the coil KM, and an emitter is grounded;
and the normally open contact KM-1 is connected between the output end of the comparator and the security and protection integrated controller.
Through adopting above-mentioned technical scheme, sometimes the pedestrian only passes through the pressure detection unit of door plant department, need not get into the museum in, the phenomenon of erroneous judgement may appear in the pressure detection unit. Set up delay circuit, pressure detecting element department security protection centralized control ware can only receive human detection signal when someone always in delay circuit's preset time, has reduced the phenomenon that entrance guard's module mistake was opened. When the first voltage V is applied1Greater than a threshold voltage V0Timing 555 timingThe high level is received to the ware, and the 555 timer exports the high level after predetermineeing the time, and NPN triode Q1 switches on this moment, and coil KM gets electric, and normally open contact KM-1 is closed under coil KM's effect, and the return circuit intercommunication between comparator and the security protection centralized control ware, the security protection centralized control ware can receive human detection signal.
Optionally, a second mounting groove is formed in the ground of the door plate, a first mounting plate is arranged at the bottom of the second mounting groove, the pressure detection unit is arranged on one side, away from the bottom of the second mounting groove, of the first mounting plate, and a second mounting plate is arranged on one side, away from the first mounting plate, of the pressure detection unit.
Through adopting above-mentioned technical scheme, pressure detection unit sets up between first mounting panel and second mounting panel, and when someone stood in the second mounting panel top, the ambient pressure that the second mounting panel received increased, and pressure detection unit can detect pressure variation. The first mounting plate can reduce the phenomenon that the pressure detection unit moves towards the ground, and improve the phenomenon that the pressure detection unit sinks into the ground under the action of external pressure; the second mounting panel can reduce the phenomenon that people directly trample the pressure detection unit, plays the protection effect to the pressure detection unit.
In summary, the present application includes at least one of the following beneficial technical effects:
human detection module detects that someone can output human detection signal when being located door plant department, and the security protection centralized control ware is based on human detection signal to shoot the people of door plant department to save the image, the staff of being convenient for is to finding the illegal people that get into in the museum, retrieves the loss that the museum caused.
Drawings
FIG. 1 is a block diagram of a museum security monitoring system according to an embodiment of the present application;
FIG. 2 is a block diagram of a human body detection module according to an embodiment of the present application;
FIG. 3 is a schematic diagram of the overall structure of a human body detection module according to an embodiment of the present application;
FIG. 4 is an exploded view of the human body detection module according to one embodiment of the present application;
FIG. 5 is a schematic circuit diagram of a human body detection module according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a circuit configuration of a delay circuit according to an embodiment of the present application;
fig. 7 is an exploded view of a human body detection module according to an embodiment of the present application.
Description of reference numerals: 100. an access control module; 200. a human body detection module; 210. an infrared emitting member; 220. an infrared receiving member; 230. a supporting seat; 231. a first mounting groove; 232. mounting holes; 233. a guide strip; 240. a guide bar; 250. a chute; 251. an elastic sheet; 260. a pressure detection unit; 261. a pressure detection circuit; 262. a threshold circuit; 263. a delay circuit; 270. a second mounting groove; 271. a first mounting plate; 272. a second mounting plate; 300. a monitoring module; 400. a security and protection integrated controller; 500. an alarm module; 510. an alarm probe; 520. an alarm actuator; 600. and (4) the ground.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-7 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses a museum security monitoring system.
Referring to fig. 1, as an embodiment of a museum security monitoring system, the museum security monitoring system includes an access control module 100, a human body detection module 200, a monitoring module 300, and a security centralized controller 400, in this embodiment, the access control module 100 may select an electric mortise lock, the electric mortise lock includes a lock tongue and a lock hole, and the lock tongue is inserted into the lock hole in a natural state to lock a door panel; the monitoring module 300 can select a camera with a photographing function.
The human body detection module 200 is used for detecting the personnel condition at the door plate, and when a person is at the door plate, the human body detection module 200 outputs a human body detection signal. The security and protection centralized controller 400 can control the camera to execute the photographing action based on the human body detection signal, acquire the image information of the human face, and simultaneously control the separation of the lock tongue and the lock hole, so that the door opening action is executed by the access control module 100, and people can conveniently enter the museum. Be provided with the button of opening the door in museum's inside, can press the button output request signal of opening the door when people need come out from museum, security protection centralized control ware 400 is based on the separation of request signal control spring bolt and lockhole of opening the door for entrance guard module 100 carries out the action of opening the door, and the people of being convenient for go out from museum. When the museum is artificially damaged, the guard can check the people entering the museum according to the image information acquired by the camera, and timely recover the loss of the museum.
In order to reduce the phenomenon that people illegally break into the museum, the security monitoring system for the museum further comprises an alarm module 500, wherein the alarm module 500 comprises an alarm probe 510 and an alarm actuator 520. When someone tries to enter the museum after breaking the human body detection module 200, the security integrated controller 400 does not receive the human body detection signal, and the door control module 100 does not execute the door opening action. At this moment, if the door panel or the access control module 100 is violently damaged, the alarm probe 510 can detect the door panel vibration and send a door panel detection signal, the security integrated controller 400 controls the alarm actuator 520 to send an alarm based on the door panel detection signal, so as to remind workers to arrive at the site in time, prevent illegal entering of the museum, and reduce damage to the articles in the museum.
Referring to fig. 2, the human body sensing module 200 may select an infrared emitting element 210 and an infrared receiving element 220 symmetrically installed at both sides of a door panel. When there is no person between the infrared transmitting element 210 and the infrared receiving element 220, the infrared signal emitted from the infrared transmitting element 210 can be received by the infrared receiving element 220; when there is a person between the infrared emitting element 210 and the infrared receiving element 220, the infrared signal emitted from the infrared emitting element 210 cannot be received by the infrared receiving element 220, and at this time, the infrared receiving element 220 sends a human body detection signal to the security centralized controller 400.
Referring to fig. 3 and 4, the infrared emitting element 210 and the infrared receiving element 220 are provided with a support base 230 at one end near the ground 600, the support base 230 is connected with the ground 600, and in the embodiment of the present invention, the support base 230 can be installed on the ground 600 by bolts. The two supporting seats 230 are connected into a whole through the guide rod 240, and the guide rod 240 can reduce the phenomenon that infrared signals cannot be received due to the fact that the two supporting seats 230 are too far away.
The supporting base 230 is provided with a first mounting groove 231 and a mounting hole 232, the mounting hole 232 is communicated with the first mounting groove 231, the infrared emitting element 210 and the infrared receiving element 220 are inserted into the first mounting groove 231, and the end of the guide rod 240 is embedded into the mounting hole 232. The fixed gib block 233 that is provided with on first mounting groove 231 inside wall, the direction and the guide bar 240 of gib block 233 are perpendicular, and spout 250 has all been seted up to the side of infrared transmitter 210 and infrared receiver 220, and the direction of spout 250 is the same with gib block 233, can with gib block 233 sliding connection. Elastic pieces 251 for clamping the guide rod 240 are fixedly installed on both opposite inner sidewalls of the sliding groove 250. When the ir emitting device 210 and the ir receiving device 220 are installed, the end of the guide bar 240 is first inserted into the installation hole 232, then the two supporting bases 230 are fixed on the floor 600, and the sliding groove 250 is aligned with the guide strip 233, so that the ir emitting device 210 and the ir receiving device 220 slide along the guide strip 233 to be close to the floor 600 until the guide bar 240 is clamped by the elastic pieces 251 on the inner side wall of the sliding groove 250, and the installation is completed.
Referring to fig. 5, as another embodiment of a museum security monitoring system, the difference is that the human body detection module 200 includes a pressure detection unit 260, and the pressure detection unit 260 can determine whether there is a human body according to pressure applied to the ground 600 at the door panel, and if there is a human body, outputs a human body detection signal.
The pressure detection unit 260 includes a pressure detection circuit 261, a threshold circuit 262, and a comparator. The pressure detection circuit 261 includes a force sensitive resistor and a voltage dividing resistor R', and the resistance value of the force sensitive resistor changes when the pressure applied thereto changes. The force-sensitive resistor is connected with a voltage-dividing resistor R ' in series, one end of the force-sensitive resistor is connected with a power supply Vcc, the other end of the force-sensitive resistor is connected with the voltage-dividing resistor R ', the other end of the voltage-dividing resistor R ' is grounded, and a first voltage V is output at the connection point of the force-sensitive resistor and the voltage-dividing resistor R1. In thatIn the embodiment of the application, the force sensitive resistor with negative coefficient is selected, the larger the pressure is, the smaller the resistance value is, and the first voltage V is output1The larger.
The threshold circuit 262 includes a first resistor R1 and a second resistor R2, the first resistor R1 and the second resistor R2 being connected in series, the threshold circuit 262 being capable of outputting a threshold voltage V0(ii) a The comparator has its non-inverting input connected to the output of the pressure detection circuit 261 and its inverting input connected to the output of the threshold circuit 262, and is responsive to a first voltage V1And a threshold voltage V0Comparing and outputting a voltage U when the first voltage V is1Greater than a threshold voltage V0The voltage U output by the comparator is high.
Referring to fig. 5 and 6, when the pressure detection circuit 261 detects a pressure change, only a pedestrian may pass through the door panel of the museum and does not want to enter the museum, which may cause a false opening phenomenon. In order to reduce the occurrence of the false opening phenomenon, the pressure detecting unit 260 is further connected to a delay circuit 263. The delay circuit 263 comprises a coil KM, normally open contacts KM-1, a 555 timer and an NPN triode Q1.
A first capacitor C1, a second capacitor C2, a third resistor R3 and a diode D are connected to a pin of the 555 timer, wherein the first capacitor C1 and the third resistor R3 are connected in series, one end of the first capacitor C1 is connected with a power supply Vcc, the other end of the third resistor R3 is grounded, and the diode D is connected in parallel to two ends of the third resistor R3.
The GND pin of 555 timer ground connection, the TR pin is connected between first condenser C1 and third resistor R3, the OUT pin is the output of 555 timer, the MR pin is connected with the power supply of 555 timer, the VC pin is connected the back ground connection with second condenser C2, the TH pin is connected with the output of comparator, the TH pin is the input of 555 timer, the VDD pin is connected with the power supply Vcc of 555 timer. The base of the NPN triode Q1 is connected with the OUT pin of the 555 timer, the collector is connected with the coil KM and then connected with the power supply Vcc, and the emitter is grounded. And the normally open contact KM-1 is connected between the output end of the comparator and the security and protection integrated controller 400.
When the first electricityPressure V1Greater than a threshold voltage V0The voltage U of time comparator output is the high level, the TH pin of 555 timer receives the high level and begins to charge first condenser C1, constantly charge along with to first condenser C1, the electric potential of TR pin and TH pin department begins to descend, when the electric potential descends to power supply Vcc's 1/3, OUT pin output high level, NPN triode Q1 switches on this moment, coil KM gets electric, normally open contact KM-1 is closed under coil KM's effect, return circuit intercommunication between comparator and the security protection centralized control ware 400, the security protection centralized control ware 400 can receive human detection signal. The length of time preset by the 555 timer can be adjusted by the staff by changing the size of the first capacitor C1.
Referring to fig. 7, in order to avoid that people directly step on the pressure detection unit 260, a second installation groove 270 is formed in the ground 600 at the door panel, a first installation plate 271 is arranged at the bottom of the second installation groove 270, and the first installation plate 271 can be directly placed at the bottom of the groove; the pressure detection unit 260 is arranged on one side of the first mounting plate 271, which is far away from the bottom of the mounting groove, and the pressure detection unit 260 can be adhered to the first mounting plate 271; the second mounting plate 272 covers the pressure detection unit 260, and the second mounting plate 272 and the first mounting plate 271 can be connected into a whole in a bonding mode, so that the phenomenon of relative displacement between the second mounting plate 272 and the first mounting plate 271 is reduced. When a person stands on the second mounting plate 272, the pressure detecting unit 260 can detect a pressure change.
The implementation principle of the museum security monitoring system in the embodiment of the application is as follows: when people normally enter the museum, the human body detection module 200 installed at the door panel detects that someone sends a human body detection signal to the security integrated controller 400 through the meeting, the security integrated controller 400 controls the monitoring module 300 to photograph the face based on the human body detection signal, and controls the access control module 100 to execute the door opening action. If the museum is artificially damaged, the guard can check the people entering the museum through the photos taken by the monitoring module 300, so that the loss of the museum is reduced.
When someone destroys in trying to get into the museum behind human detection module 200, human detection module 200 does not detect someone this moment, entrance guard module 100 does not execute the action of opening the door, if door plant or entrance guard module 100 are destroyed to violence, install alarm probe 510 on the door plant and can send the door plant to survey signal to security protection centralized control ware 400, security protection centralized control ware 400 can be according to door plant survey signal control alarm executor 520 and send the warning, the staff of being convenient for in time arrives the scene, prevent illegal phenomenon that gets into in the museum, reduce the loss of museum.
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 (9)
1. A museum security monitoring system, comprising: the system comprises an access control module (100), a human body detection module (200), a monitoring module (300) and a security integrated controller (400);
the human body detection module (200) is used for detecting the personnel condition at the door panel to output a human body detection signal;
the security and protection integrated controller (400) is connected with the human body detection module (200) and used for receiving the human body detection signal and controlling the door opening action of the entrance guard module (100) and controlling the photographing action of the monitoring module (300) based on the human body detection signal.
2. The museum security monitoring system of claim 1, further comprising an alarm module (500), the alarm module (500) comprising an alarm probe (510) and an alarm actuator (520);
the alarm probe (510) is used for detecting the door panel vibration condition so as to output a door panel detection signal;
the security and protection integrated controller (400) is connected with an alarm probe (510) and used for receiving the door panel detection signal and controlling the alarm actuator (520) to give an alarm based on the door panel detection signal.
3. The museum security monitoring system according to claim 1, wherein the human body detection module (200) comprises an infrared emitting element (210) and an infrared receiving element (220), and the infrared emitting element (210) and the infrared receiving element (220) are symmetrically arranged on two sides of the door panel.
4. The museum security monitoring system according to claim 3, wherein a support base (230) is connected to each of the infrared emitting element (210) and the infrared receiving element (220) near the ground (600), and a guide rod (240) is connected between the two support bases (230).
5. The museum security monitoring system according to claim 4, wherein the two supporting seats (230) are respectively provided with a first mounting groove (231) for inserting the infrared emitting element (210) and the infrared receiving element (220), the supporting seats (230) are further provided with a mounting hole (232) for inserting the end of the guide rod (240), and the mounting hole (232) is communicated with the first mounting groove (231);
the side surfaces of the infrared emitting piece (210) and the infrared receiving piece (220) are provided with sliding grooves (250) along the direction vertical to the guide rod (240), and elastic pieces (251) used for clamping the end parts of the guide rod (240) are installed on two opposite inner side walls of the sliding grooves (250).
6. The museum security monitoring system according to claim 5, wherein the inner side wall of the first installation groove (231) is provided with a guide bar (233) along a direction perpendicular to the guide bar (240), the guide bar (240) is located on a side of the guide bar (233) close to the ground (600), and the guide bar (233) is slidably connected with the sliding groove (250).
7. The museum security monitoring system according to claim 1, wherein the human detection module (200) comprises a pressure detection unit (260), the pressure detection unit (260) comprising:
a pressure detection circuit (261) for detecting the pressure on the ground (600) at the door panel and outputting a first voltage V1；
A threshold circuit (262) for outputting a threshold voltage V0；
A comparator having a non-inverting input connected to the pressure detection circuit (261) and an inverting input connected to the threshold circuit (262) for comparing the first voltage V1And a threshold voltage V0If the first voltage V is larger than the second voltage V1Greater than a threshold voltage V0Then, a human detection signal is output.
8. The museum security monitoring system according to claim 7, wherein the human detection module (200) further comprises a delay circuit (263), the delay circuit (263) comprises a coil KM, a normally open contact KM-1, a 555 timer and an NPN transistor Q1;
the input end of the 555 timer is connected with the output end of the comparator, and the output end of the 555 timer is connected with the base electrode of an NPN triode Q1;
a collector of the NPN triode Q1 is connected with the coil KM, and an emitter is grounded;
and the normally open contact KM-1 is connected between the output end of the comparator and the security and protection integrated controller (400).
9. The museum security monitoring system according to claim 8, wherein a second mounting groove (270) is formed in the floor (600) of the door panel, a first mounting plate (271) is disposed at the bottom of the second mounting groove (270), the pressure detecting unit (260) is disposed at a side of the first mounting plate (271) away from the bottom of the second mounting groove (270), and a second mounting plate (272) is disposed at a side of the pressure detecting unit (260) away from the first mounting plate (271).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121465211.4U CN215006857U (en) | 2021-06-29 | 2021-06-29 | Museum security monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121465211.4U CN215006857U (en) | 2021-06-29 | 2021-06-29 | Museum security monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215006857U true CN215006857U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121465211.4U Expired - Fee Related CN215006857U (en) | 2021-06-29 | 2021-06-29 | Museum security monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215006857U (en) |
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2021
- 2021-06-29 CN CN202121465211.4U patent/CN215006857U/en not_active Expired - Fee Related
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