CN214896834U

CN214896834U - Double-technology detection alarm device

Info

Publication number: CN214896834U
Application number: CN202121132651.8U
Authority: CN
Inventors: 方雪明; 曹功亮; 赖泽南; 郑志平
Original assignee: Zhejiang Yiyun Internet Of Things Technology Co ltd
Current assignee: Zhejiang Yiyun Internet Of Things Technology Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-11-26
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a two technologies detection alarm device, its characterized in that: the system comprises a dual-technology detector, a channel and an alarm host, wherein the dual-technology detector comprises an infrared sensor and a microwave sensor, and the channel adopts two cores of 0.5mm²Shielding signalsLine, through channel electric connection between double-technology detector, alarm host, the utility model discloses can improve system reliability, can alarm host be forced to be opened, play the effect of preventing tearing open.

Description

Double-technology detection alarm device

Technical Field

The utility model relates to a device, more specifically say a bit, relate to a double-technology detection alarm device, belong to the security protection field.

Background

The intrusion alarm system is an electronic system or network which detects and indicates the behavior of illegal entry or attempted illegal entry into a fortification area, processes alarm information, and sends out the alarm information by using a sensor technology and an electronic information technology. At present, the anti-intrusion device is widely applied to various places such as factories, schools, hospitals and families, and plays a positive role in preventing the intrusion of lawbreakers.

Along with the optimization of the technology, the technology of preventing false alarm is gradually improved, but the detector signal is inaccurate, and the alarm also has the function of preventing disassembly.

SUMMERY OF THE UTILITY MODEL

In order to solve the prior art problem, the utility model provides a double-technology detection alarm device which has simple structure, can effectively solve the technical characteristics such as intrusion detection leak that cause because of the trouble of detector self, the destruction of channel etc..

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides a two technologies detection alarm device which characterized in that: the system comprises a dual-technology detector, a channel and an alarm host, wherein the dual-technology detector comprises an infrared sensor and a microwave sensor, and the channel adopts two cores of 0.5mm²And the dual-technology detector and the alarm host are electrically connected through a channel.

Preferably, the dual-technology detector further comprises a microprocessor A, a multiplexer A and a power supply voltage stabilizer, wherein the infrared sensor, the microwave sensor and the multiplexer A are electrically connected with the microprocessor A, the multiplexer A and the power supply voltage stabilizer are electrically connected, and the multiplexer A is electrically connected with a channel for communication.

Preferably, the alarm host comprises a microprocessor B, a multiplexer B, a hardware watchdog, a control panel, a current sampler, an anti-disassembly switch, a power circuit, a storage battery and an alarm output interface, wherein the hardware watchdog, the control panel and the multiplexer B are all electrically connected with the microprocessor B, the storage battery, the power circuit and the current sampler are sequentially electrically connected, the current sampler is also respectively electrically connected with the multiplexer B and the microprocessor B, and the anti-disassembly switch is electrically connected with the microprocessor B.

Preferably, the tamper switch comprises a shell and a sensor adopting a hall element, the shell is sunken with a cavity, two pressure spring guide posts are arranged in the cavity, connecting rods are respectively arranged on the pressure spring guide posts in a sliding and penetrating manner, pressure springs are sleeved on the pressure spring guide posts between the connecting rods and the bottom of the cavity, the bottom ends of the pressure springs are connected to the bottom of the cavity, a top rod is connected between the connecting rods to be linked with the connecting rods, the bottom of the top rod 4 is connected with magnetic steel, the sensor is arranged outside the shell, when the dual-technology detection alarm device is installed on an installation surface, the top rod is pressed into the cavity, the pressure springs are compressed, and the distance between the magnetic steel at the bottom of the top rod and the sensor is close to enable the sensor to output a low level after sensing the magnetic field of the magnetic steel; when the shell is detached from the mounting surface, the ejector rod 4 is ejected by the pressure spring, the Hall element cannot sense the magnetic field of the magnetic steel, and high level is output.

Preferably, the storage battery is connected in parallel to the power supply loop, a floating charging mode is adopted to prevent the power failure or damage of the network power supply, and the storage battery provides power supply for the alarm device electrically connected with the alarm output interface.

Preferably, the current sampler adopts a precision resistor with the precision of 1 per mill as a sampling device, the current of the load double-detection detector 1.1 is monitored in real time, and when the current fluctuation is more than 20%, the current is judged to be abnormal fluctuation, and an alarm is triggered.

Preferably, the communication between the dual-technology detector and the alarm host adopts a random number response mode.

Preferably, the alarm device can be a horn and/or an LED lamp.

Has the advantages that: the utility model discloses can improve the reliability of alarm, alarm host has the effect of preventing tearing open.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the schematic view of the anti-tamper switch of the present invention.

Fig. 3 is a functional block diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.

As shown in fig. 1 to 3, a dual technology detection alarm device according to an embodiment of the present invention is characterized in that: the device comprises a dual-technology detector 1.1, a channel 1.2 and an alarm host 1.3, wherein the dual-technology detector 1.1 comprises an infrared sensor and a microwave sensor, and the channel 1.2 adopts two cores of 0.5mm²And the dual-technology detector 1.1 and the alarm host 1.3 are electrically connected through a channel 1.2.

The detector 1.1 can sense the change of various physical quantities such as humidity, temperature, sound, energy and the like on site according to different functions and types and convert the change into an electric signal; the signal channel 1.2 is a signal transmission channel, has different building modes of a branch system, a bus system, a wireless system, a public network and the like, and the alarm host 1.3 is responsible for arming, disarming, alarming and the like of the whole system, is usually connected with an audible and visual alarm, a storage battery for power failure prevention and the like, and reduces the false alarm rate by adopting infrared and microwave double detection.

The dual-technology detector 1.1 further comprises a microprocessor A, a multiplexer A and a power supply voltage stabilizer, wherein the infrared sensor, the microwave sensor and the multiplexer A are electrically connected with the microprocessor A (a CPU or a single chip microcomputer), the multiplexer A and the power supply voltage stabilizer are electrically connected, and the multiplexer A is electrically connected with the channel 1.2 for communication.

Alarm host 1.3 includes microprocessor B, multiplexer B, hardware watchdog, control panel, current sample thief, prevents tearing open switch, power supply loop, battery, alarm output interface, hardware watchdog, control panel (touch-sensitive screen etc.), multiplexer B all with microprocessor B (CPU or singlechip) electric connection, battery, power supply loop, current sample thief be electric connection in proper order, the current sample thief still respectively with multiplexer B, microprocessor B electric connection, prevent tearing open switch and microprocessor B electric connection.

The hardware watchdog comprises an integrated circuit MAX813L and external conventionally selected surrounding elements, and has the main functions of being provided with a RESET output under the conditions of power-on, power-off and voltage reduction, an independent timer circuit, a 1.25V threshold detector, a manual RESET input end and the like, and belongs to the existing mature technology, so that the detailed description is omitted. Multiplexer (Multiplexer), which includes time division Multiplexer, wavelength division Multiplexer, terminal Multiplexer, data Multiplexer, frequency division Multiplexer, etc., the principle is: a multiplexer is a device that combines a large stack of signals together for ease of transmission.

The power supply circuit comprises a direct-current power supply adapter and a charging and discharging circuit, wherein the direct-current power supply adapter adopts an LRS-100-12 type switching power supply, the rated voltage of the direct-current power supply adapter is 12V, the rated circuit is 8.5A, the input voltage range is 85-264VAC, the overload and overvoltage protection is realized, the size is 129 x 97 x 30mm, the direct-current power supply adapter provides a stable direct-current power supply with a small ripple system for all equipment, the charging and discharging circuit comprises an integrated circuit CN3767, a storage battery and peripheral elements which are conventionally selected for use, the CN3767 has trickle, constant current, overcharging and floating charging modes, and the charging voltage typical values are 14.8V and 13.55V respectively in the overcharging and floating charging modes; in the constant current charging mode, the charging current is set by an external resistor, if the battery voltage is lower than 75% of the set overcharge voltage, CN3767 trickle charges the battery with 17.5% of the set constant current charging current, the charging current is gradually reduced in the overcharge stage, and CN3767 enters a floating charge state when the charging current is reduced to 38% of the constant current charging current. In the float state, if the battery voltage drops to 83.95% of the set overcharge voltage, a new charge cycle is automatically started. When the input power supply is powered off or the input voltage is lower than the battery voltage, CN3767 automatically enters the low power consumption sleep mode. The specification of the storage battery is 12V8AH20HR type lithium battery.

In a preferred embodiment mode, the tamper switch comprises a housing 1 and a sensor 2 adopting a hall element, the housing 1 is recessed with a cavity, two pressure spring guide posts 5 are arranged in the cavity, connecting rods are respectively slidably arranged on the pressure spring guide posts 5 in a penetrating manner, pressure springs 6 are respectively sleeved on the pressure spring guide posts 5 between the connecting rods and the bottom of the cavity, the bottom ends of the pressure springs 6 are connected to the bottom of the cavity, a top rod 4 is connected between the connecting rods to be linked with the connecting rods, the bottom of the top rod 4 is connected with a magnetic steel 3, the sensor 2 is arranged outside the housing 1, when the dual-technology detection alarm device is installed on an installation surface, the top rod 4 is pressed into the cavity, the pressure springs 6 are compressed, and the magnetic steel 3 at the bottom of the top rod 4 is close to the sensor 2 so that the sensor 2 outputs a low level after sensing the magnetic field of the magnetic steel 3; when the shell 1 is detached from the mounting surface, the ejector rod 4 is ejected by the pressure spring 6, the Hall element cannot sense the magnetic field of the magnetic steel 3, and high level is output.

The principle is as follows: a Hall element is used as a sensor, and the magnetic steel 3 at the bottom of the ejector rod 4 is used as a trigger source. Is arranged near the door lock of the alarm main machine 1.3. When the alarm host 1.3 closes the box door, the ejector rod 4 is pressed into the cavity, the pressure spring 6 is compressed, the magnetic steel 3 at the bottom of the ejector rod 4 is close to the Hall element, and the Hall element outputs low level after sensing the magnetic field of the magnetic steel; on the contrary, when the door of the alarm host 1.3 is opened, the ejector rod 4 is ejected by the pressure spring 6, the Hall element cannot sense the magnetic field of the magnetic steel 3, and high level is output. Therefore, the output level of the Hall element can judge the door state of the alarm host 1.3, and the anti-dismounting function is achieved. As the result adopts the non-contact Hall element as the sensing element, mechanical faults like a travel switch are avoided, and the reliability of the device is improved.

In a preferred embodiment, the storage battery is connected in parallel to a power supply loop, a floating charging mode is adopted to prevent the network power supply from being powered off or damaged, and the storage battery provides power supply for the alarm device electrically connected with the alarm output interface.

In a preferred embodiment, the current sampler adopts a precision resistor with the precision of 1 per mill as a sampling device, monitors the current of the load dual-technology detector 1.1 in real time, and when the current fluctuation is more than 20%, the current is judged to be abnormal fluctuation, and an alarm is triggered.

In a preferred embodiment mode, the communication between the dual-technology detector 1.1 and the alarm host 1.3 adopts a random number response mode.

In a preferred embodiment, the alarm device may be a horn and/or an LED lamp.

The principle of the application is as follows: the alarm host 1.3 detects the closing state of the anti-disassembly switch in real time to prevent an intruder from damaging the alarm host; the hardware watchdog is used for executing the action of 'feeding dogs' by the microprocessor at regular time, when abnormal conditions (such as halt, program running off and the like) occur to the microprocessor, the hardware watchdog forcibly executes hardware reset to the microprocessor because the hardware watchdog does not obtain 'feeding dogs' in time, so that the alarm host 1.3 is confirmed to be effective in real time, the storage battery is connected into the power supply loop in parallel, a floating charging mode is adopted, and once the network power supply is powered off or damaged, the storage battery provides power supply for the alarm device. The current sampling circuit adopts a precision resistor with the precision of 1 per mill as a sampling device to monitor the current of a load (a dual-technology detector) in real time. When the current fluctuation is more than 20 percent (if the line is damaged or illegal equipment is accessed in the line), the current fluctuation is judged to be abnormal fluctuation, and an alarm is triggered.

The dual-technology detector adopts infrared and microwave dual detection, utilizes infrared to sense the temperature of an object, utilizes microwave to sense the movement of the object, and can set a microprocessor to judge and filter interference signals near the temperature of the non-human body (37 ℃) and with the object movement speed being greater than the human motion limit (10m/s), thereby reducing the false alarm rate.

The communication between the dual technology detector and the alarm host 1.3 adopts a random number response mode. When the dual-technology detector communicates (defends) with the alarm host 1.3 for the first time, the alarm host 1.3 sends a plurality of groups (generally 20) of 8-bit random numbers to write into a plurality of groups of storage spaces opened up by the dual-technology detector, and the dual-technology detector returns corresponding 20 storage space addresses to the alarm host. During subsequent communication, the alarm host regularly inquires the state of the equipment (whether an alarm exists) from the dual-technology detector, one address of 20 addresses is randomly attached to the alarm host, the return value of the dual-technology detector is additionally provided with a random number inquired according to the address besides the state of the equipment, and the alarm host judges whether the dual-technology detector works normally and whether the return value is effective according to the random number.

The communication signal line and the power line between the double-technology detector and the alarm host adopt a multiplexer for on-line multiplexing, the power supply adopts a choke coil for separation, and the signals adopt a photoelectric coupler for coupling. On the one hand, the wiring cost is saved, and on the other hand, the anti-damage capability of the device is improved. The anti-intrusion alarm device has the characteristics of improving the reliability of equipment, preventing the damage of the alarm device and the like while meeting the requirements of preventing intrusion and reducing false alarm.

Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.

Claims

1. The utility model provides a two technologies detection alarm device which characterized in that: including dual-technology detector (1.1), channel (1.2), alarm host computer (1.3), dual-technology detector (1.1) includes infrared sensor (2), microwave sensor (2), channel (1.2) adopt two cores 0.5mm²And the dual-technology detector (1.1) and the alarm host (1.3) are electrically connected through a channel (1.2).

2. The dual technology detection alarm device of claim 1, wherein: the dual-technology detector (1.1) further comprises a microprocessor A, a multiplexer A and a power supply voltage stabilizer, the infrared sensor (2), the microwave sensor (2) and the multiplexer A are all electrically connected with the microprocessor A, the multiplexer A and the power supply voltage stabilizer are electrically connected, and the multiplexer A is electrically connected with the channel (1.2) for communication.

3. The dual technology detection alarm device of claim 1 or 2, wherein: alarm host (1.3) include microprocessor B, multiplexer B, hardware watchdog, control panel, current sample thief, prevent tearing open switch, power return, battery, alarm output interface, hardware watchdog, control panel, multiplexer B all with microprocessor B electric connection, battery, power return, current sample thief be electric connection in proper order, the current sample thief still respectively with multiplexer B, microprocessor B electric connection, prevent tearing open switch and microprocessor B electric connection.

4. The dual technology detection alarm device of claim 3, wherein: the anti-disassembly switch comprises a shell (1) and a sensor (2) adopting a Hall element, wherein the shell (1) is sunken with a cavity, two pressure spring guide posts (5) are arranged in the cavity, connecting rods respectively penetrate through the pressure spring guide posts (5) in a sliding manner, pressure springs (6) are sleeved on the pressure spring guide posts (5) between the connecting rods and the bottom of the cavity, the bottom ends of the pressure springs (6) are connected to the bottom of the cavity, ejector rods (4) are connected between the connecting rods to be linked with the connecting rods, magnetic steel (3) is connected to the bottom of the ejector rods (4), the sensor (2) is arranged outside the shell (1), when the dual-technology detection alarm device is installed on an installation surface, the ejector rods (4) are pressed into the cavity, the pressure springs (6) are compressed, the distance between the magnetic steel (3) at the bottom of the ejector rods (4) and the sensor (2) is close to enable the sensor (2) to sense the magnetic field of the magnetic steel (3), outputting a low level; when the shell (1) is detached from the mounting surface, the ejector rod (4) is ejected by the pressure spring (6), the Hall element cannot sense the magnetic field of the magnetic steel (3), and high level is output.

5. The dual technology detection alarm device of claim 3, wherein: the storage battery is connected in parallel to the power supply loop, a floating charging mode is adopted to prevent the power failure or damage of the network power supply, and the storage battery supplies power to the alarm device electrically connected with the alarm output interface.

6. The dual technology detection alarm device of claim 3, wherein: the current sampler adopts a precision resistor with the precision of 1 per mill as a sampling device, monitors the current magnitude of the load double-detection detector (1.1) in real time, judges abnormal fluctuation when the current fluctuation is more than 20 percent, and triggers an alarm.

7. The dual technology detection alarm device of claim 1, wherein: the communication between the dual-technology detector (1.1) and the alarm host (1.3) adopts a random number response mode.

8. The dual technology detection alarm device of claim 5, wherein: the alarm device is a loudspeaker and/or an LED lamp.