CN201936411U - Anti-theft warning system - Google Patents

Abstract

The utility model belongs to the technical field of electronics and particularly relates to an anti-theft warning system. The anti-theft warning system comprises a microprocessor, a warning module and a sensor module, wherein both the warning module and the sensor module are connected with an IO port of the microprocessor, and the sensor module adopts a microwave sensor. The utility model has the benefits that the adopted microwave sensor is sensitive and accurate in signal detection, is free from the limitation of external environment, can be installed in the wall and further keeps the wall surface attractive, so that the problem that the traditional infrared sensor is sensitive to the heat source signal outside to lead to false alarms is solved, and the problem that the aesthetic property is affected since the infrared sensor is liable to be shielded by an external object and required to be installed on the wall surface is also solved; since the wireless transmitting module and the wireless receiving modules are adopted, the control is convenient; since the GSM (Global System for Mobile Communications) module is adopted, a user is notified of taking measures in time, and the loss is further retrieved; and the anti-theft warning system can be applied to residential buildings, units, shops and other indoor places and has great popularization values.

Description

Anti-theft alarm system

technical field

The utility model relates to the field of electronic technology, in particular to an anti-theft alarm system.

Background technique

The anti-theft device has certain anti-theft and safety functions. At present, the anti-theft device can be roughly divided into the following types:

1. Anti-theft door and anti-theft net. In cities, almost every house installs anti-theft doors and anti-theft nets, lest criminals enter their homes. Although this method can play a certain role in anti-theft, the effect is not obvious;

2. Anti-theft alarm. The installation cost of the anti-theft alarm is low, and the anti-theft effect is better than that of the traditional anti-theft door and anti-theft window. Pyro-infrared sensors are easily affected by the environment and cannot be placed close to heat sources such as kitchens and microwave ovens. In addition, pyro-infrared sensors are sensitive to external heat source signals, which are prone to false alarms, causing false alarms and affecting normal life. Pyro-infrared sensors are easily blocked by external objects and must be installed on the surface of the wall, which affects the appearance and is easily damaged by criminals.

This shows that above-mentioned existing anti-theft device has inconvenience and defect in structure and use, needs to be improved urgently.

Contents of the invention

The technical problem to be solved by the utility model is to provide an anti-theft alarm system with accurate signal detection and not limited by the external environment in view of the above-mentioned deficiencies in the prior art.

The technical solution adopted by the utility model for solving the problems mentioned above is: it includes a microprocessor, an alarm module and a sensor module, and the alarm module and the sensor module are connected with the IO port of the microprocessor respectively, and the described sensor module is microwave sensor.

According to the above solution, the alarm module is a buzzer.

According to the above solution, the anti-theft alarm system also includes a GSM module, and the GSM module is connected with the microprocessor through the RS232 interface.

According to the above scheme, the GSM module adopts a pure short message module.

According to the above solution, the anti-theft alarm system further includes a wireless sending module and a wireless receiving module, and the wireless receiving module is connected to the IO port of the microprocessor.

According to the above solution, the wireless receiving module uses PT2272 to decode, and the wireless sending module uses PT2262 as an encoding chip.

According to the above scheme, there are more than one wireless sending modules.

According to the above scheme, there are more than one microwave sensors.

According to such scheme, described microprocessor is 51 single-chip microcomputers.

Among them: the microprocessor has multi-channel AD acquisition function, processes the data information of the microwave sensor and the wireless receiving module, controls the alarm module and the GSM module, and is the core of the whole equipment. The microwave sensor has strong anti-radio frequency interference ability, and is not affected by temperature, humidity, light, airflow, and dust. It can be installed in a non-metallic shell such as plastic, glass, and wood products with a certain thickness. The installation is concealed, the stability is good, and it can be accurately detected. to human body movement signals. The alarm module adopts a self-excited buzzer, and when the IO port of the microprocessor is set to a high or low level, the buzzer sends out an alarm sound to frighten criminals. The wireless receiving module receives the instructions sent by the wireless sending module, decodes them and transmits them to the microprocessor for system control. The GSM module uses a pure SMS module, which communicates with the microprocessor through the RS232 interface, and only supports voice and SMS services. When the microwave sensor detects the human body movement signal, the microprocessor sends a standard AT command to the module to realize wireless communication. function, send short messages or make calls to the owner's mobile phone. The wireless sending module sends the arming/disarming status signal to the wireless receiving module.

The beneficial effects of the utility model are as follows: 1. The microwave sensor is adopted, the signal detection is sensitive and accurate, and is not limited by the external environment, which ensures the stability of the anti-theft function and solves the problem that the traditional infrared sensor is sensitive to external heat source signals and is easy to be mistaken. The problem reported; the microwave sensor can be installed in the wall, which solves the problem that the infrared sensor is easily shielded by external objects and must be installed on the surface of the wall, which increases the concealment, ensures that the anti-theft system is not easy to be damaged, and increases security. 2. It adopts wireless sending and receiving modules, which is convenient for users to control. 3. GSM module is adopted to notify the user in time, so that the user can take measures to recover the loss. 4. It can be applied to various indoor places such as residential houses, units and shops, and has great promotion and application value.

Description of drawings

Fig. 1 is a structural block diagram of an embodiment of the utility model.

Detailed ways

Further illustrate the embodiment of the present utility model below in conjunction with accompanying drawing.

Referring to Fig. 1, anti-theft alarm system, it comprises microprocessor, and the IO mouth of microprocessor is connected with alarm module, microwave sensor and wireless receiving module respectively, and microprocessor is connected with the GSM module that adopts pure short message module by RS232 interface. The wireless receiving module uses PT2272 for decoding, the wireless sending module uses PT2262 as an encoding chip, and the wireless sending module sends the arming/unarming status signal to the wireless receiving module. Described microprocessor is 51 single-chip microcomputers. The alarm module is a self-excited buzzer.

Multiple microwave sensors can be installed according to actual needs. There may also be multiple wireless sending modules.

Microwave sensors can be installed inside the ceiling above the door or window, or in the wall around the door or window.

The working process is: before the user leaves the house, the arming command is sent through the wireless sending module. The wireless sending module sends the command to the wireless receiving module through the radio, the wireless receiving module receives and decodes the command, and passes the obtained arming command to the 51 single-chip microcomputer through the IO port. After the 51 single-chip microcomputer gets the instruction, it makes the system work in the defense state.

When the user leaves, if a criminal tries to break into the door or enter through the window, the microwave sensor will detect the human body movement signal, the alarm module will work in the alarm state, and the buzzer will emit a high-decibel alarm sound , Attract the attention of people around, scare criminals, slow down the progress of theft or scare away criminals. At the same time, the 51 single-chip microcomputer sends standard AT commands to the GSM module to control the GSM module to realize the wireless communication function, send short messages to the user's mobile phone or dial the user's phone number, remind the user that the house is being stolen, and notify the user to take relevant measures to recover economic losses .

If no one tries to enter the house while the user is out of the house, the system remains armed. When the user comes back, he only needs to send the withdrawal instruction through the wireless sending module. The wireless sending module sends the instruction to the wireless receiving module through radio, and the wireless receiving module receives and decodes the instruction, and transmits the obtained withdrawal instruction to the 51 single-chip microcomputer through the IO port. After the 51 single-chip microcomputers get the instructions, the system works in the disabling state, and the user can enter the room.

Because the microwave sensor only monitors the places where criminals may enter, such as doors and windows, it can also be deployed when the user is sleeping at night to prevent criminals from breaking into the house while the owner is asleep.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Those skilled in the art make some simple modifications, equivalent changes or modifications using the technical content disclosed above, and all fall under Within the protection scope of the present utility model.

Claims (9)

1. An anti-theft alarm system includes a microprocessor, an alarm module and a sensor module, and the alarm module and the sensor module are connected with the IO port of the microprocessor respectively, and it is characterized in that: the sensor module is a microwave sensor. 2. The anti-theft alarm system according to claim 1, characterized in that: said alarm module is a buzzer. 3. The anti-theft alarm system according to claim 1, characterized in that: the anti-theft alarm system further comprises a GSM module, and the GSM module and the microprocessor are connected through an RS232 interface. 4. The anti-theft alarm system according to claim 3, characterized in that: said GSM module adopts a pure short message module. 5. The anti-theft alarm system according to claim 1, characterized in that: said anti-theft alarm system further comprises a wireless sending module and a wireless receiving module, and the wireless receiving module is connected to the IO port of the microprocessor. 6. The anti-theft alarm system according to claim 5, wherein the wireless receiving module uses PT2272 for decoding, and the wireless sending module uses PT2262 as an encoding chip. 7. The anti-theft alarm system according to claim 5 or 6, characterized in that there are more than one wireless sending modules. 8. The anti-theft alarm system according to claim 1, wherein there is more than one microwave sensor. 9. The anti-theft alarm system according to claim 1, 3 or 5, characterized in that: the microprocessor is a 51 single-chip microcomputer.

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