CN104809836A - Infrared scanning type multifunctional peephole security device and control method thereof - Google Patents

Abstract

The invention discloses an infrared scanning multifunctional cat's eye security device and a control method thereof, comprising an infrared transceiver module, a light detection module, a remote communication module, lighting lamp beads, an audible and visual alarm, a lithium battery, a remote controller and a control circuit board wait. It mainly realizes the five functions of "cat's eye" anti-theft, remote alarm, automatic lighting of door lights, security alarm and emergency lighting. Install a pair of infrared emitting and receiving modules on both sides of the cat's eye. Once a foreign object passes through the cat's eye, it will cut off the infrared transmission and trigger an alarm; install another pair of infrared emitting and receiving modules on both sides of the door. The infrared transmission will also be cut off if the door is opened or someone breaks in, and then the device will automatically light up the door light or trigger an alarm; when the power fails, the device will automatically be replaced by a lithium battery to provide emergency lighting while realizing normal functions.

Description

Infrared scanning multifunctional cat's eye security device and its control method

       

technical field

The invention relates to an infrared scanning multifunctional cat's-eye security device and a control method thereof, which can realize security functions of various doors or windows by emitting and receiving infrared rays.

Background technique

"Cat's eye" theft is the act of thieves destroying and removing the "cat's eye" on the anti-theft door, inserting a special tool from the "cat's eye" into the room to open the door to commit theft. In the face of rampant thieves and superb theft methods, we cannot sit still.

According to the novelty search, the door-opening automatic lighting device in document [1] (patent application number: 201320476398.7) is designed with a switch inside the door lock, which is simple and reliable, but has a single function and needs to replace the door lock; document [2] (patent application number : 201220331218.1), a door-opening automatic light-on device also adopts a mechanical switch method, which has a single function and is difficult to apply to sliding doors and windows; document [3] (patent application number: 201220392772.0) proposes an automatic door-opening light-on device with delay The function of turning off the light from time to time, but the contact detection method is still used, and there is no security alarm function; the multi-functional electronic The security alarm is equipped with a light detection circuit, which can distinguish between day and night, but it is mainly used for security and cannot be used in case of power failure; the automatic lighting device in document [6] (patent application number: 201220368951.0) adopts the door magnetic detection method , with limited applications and no security features. Now we propose to use infrared detection on the gate tower, cleverly design the circuit, and form an intelligent, multi-purpose security device and its control method.

Contents of the invention

Purpose of the invention: Aiming at the problems and deficiencies in the prior art, the present invention provides an infrared scanning multifunctional cat's eye security device and its control method, which has "cat's eye" anti-theft, remote alarm, automatic lighting of door lights, security alarm and Five functions of emergency lighting.

Technical solution: An infrared scanning multifunctional cat's eye security device, including a cat's eye, an infrared transceiver module, a light detection module, a remote communication module, a lighting lamp bead, an audible and visual alarm and a control circuit; the infrared transceiver module includes two pairs of infrared rays Transmitters and infrared receivers, wherein the first pair of infrared transmitters and infrared receivers are respectively installed on the doors on both sides of the cat's eye, and the infrared light emitted by the infrared transmitter passes through the center of the cat's eye. When a foreign object is inserted from the cat's eye, The transmission of infrared light is immediately blocked; the second pair of infrared emitters and infrared receivers are respectively installed on the walls on both sides of the door, and when the door is opened, the transmission of external light is immediately blocked; the infrared The transceiver module, the light detection module, the remote communication module, the lighting lamp bead, and the sound and light alarm are respectively connected with the control circuit.

The power supply mode of the control circuit is two kinds of remote controllers, the mains electricity and the lithium battery, and the working state of the control circuit is controlled by the remote controller.

The remote communication module of the control circuit sends information to the remote terminal; the remote terminal is a mobile phone.

The remote terminal can send a control instruction to the control circuit through the remote communication module to control the opening and closing of the control circuit, the elimination of the alarm, and the like.

The first pair of infrared emitters and infrared receivers are respectively installed within 10 centimeters away from the cat's eye, and it is necessary to ensure that the beam width emitted does not exceed 0.5 centimeters.

The device also includes a light detection module installed on the window, a lighting lamp bead and a pair of infrared emitters and infrared receivers installed on both sides of the window, the light detection module, the infrared emitter and the infrared receiver are respectively connected with the control circuit.

The control circuit includes a single-chip microcomputer, a lithium battery voltage detection circuit, a lithium battery charging circuit, a remote control response circuit, a lamp bead drive circuit, a serial communication interface circuit, etc.; the single-chip microcomputer detects the power of the lithium battery through the lithium battery voltage detection circuit. When the power is lower than the preset value, the lithium battery charging circuit is controlled to charge the lithium battery; the mains supplies power to the voltage detection circuit, the charging circuit and the power supply circuit of the control circuit respectively through the adapter, wherein the lithium battery and the mains are connected to the power circuit through a relay.

The control circuit receives the signal of the remote controller through the remote control transponder, and can also receive the control instruction through the keys on the control circuit board.

The remote communication module communicates with the single-chip microcomputer through the serial communication interface circuit.

The control circuit controls the lighting beads and the sound and light alarm to be turned off and on through the power drive circuit.

A control method for an infrared scanning multifunctional cat's eye security device. The control circuit detects whether the infrared rays are blocked. If it is blocked, the sound and light alarm is controlled to alarm, and the lighting lamp beads are activated at the same time, and the alarm information is passed through the remote communication module. Send to the remote terminal; the control circuit receives the control information of the remote control or the buttons on the control circuit board or the remote terminal, and executes the corresponding instructions. The control information includes opening and closing the sound and light alarm alarm and lighting lamp beads; the control circuit The power of the lithium battery is detected by the lithium battery voltage detection circuit. If the power is lower than the preset value, the lithium battery charging circuit is controlled to charge the lithium battery; if the mains power is cut off, the lithium battery is powered on.

When the control circuit detects that the infrared rays are blocked, the light detector is activated, and the light detector controls the opening and closing of the lighting beads.

In the automatic door light mode, install an infrared transmitter and an infrared receiver (shared with the door and window security function) on the walls or door frames on both sides of the door (based on the principle of easy installation and not blocking infrared transmission). When the door is closed, the infrared receiver can receive the light signal of the infrared transmitter; when the door is opened, the receiver cannot receive the light signal. The control circuit monitors the return signal of the infrared receiver in real time, and once the door is found to be opened, the door light is automatically turned on. The specific steps of this method are as follows:

(1) Install an infrared transmitter and an infrared receiver on both sides of the door respectively, and connect them to the control circuit. After power on, the control circuit starts to monitor the return signal of the infrared receiver in real time;

(2) The infrared receiver can normally receive the infrared rays emitted by the infrared transmitter, the infrared receiver returns a high-level signal, and the control circuit judges that the door is closed. At this point, the device is in a normal monitoring state until step (3);

(3) If the door is opened, the infrared receiver cannot receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a low-level signal. The control circuit determines that the door has been opened, and immediately lights up the LED lighting beads until step (4);

(4) If the door is closed again, the infrared receiver can receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a high level signal. The control circuit judges that the door has been closed, and immediately turns off the LED lighting beads. The device returns to the state of step (2);

(5) In the event of a city power outage, the system will automatically switch to lithium battery power and continue to work normally. The device will stop working when the system power is turned off or the lithium battery stops supplying power for too long.

Infrared scanning door and window security method

It is not enough to have "cat's eye" anti-theft in security work. What if a thief pries open the door and breaks the window to enter the room to commit crimes? For this kind of alarm situation, the present invention proposes the infrared scanning type door and window security method. Infrared scanning door and window security is to install infrared transmitters and infrared receivers on the walls or door frames on both sides of the door (shared with the automatic door light function). When the door and window are closed, the infrared receiver can receive the light signal of the infrared transmitter; when the door and window are opened, the receiver cannot receive the light signal. The control circuit monitors the return signal of the infrared receiver in real time. Once the door and window are found to be opened, it will automatically alarm with sound and red flashing light, and automatically send an alarm message to the pre-stored mobile phone number through the GSM communication module. The specific steps of this method are as follows:

(1) Install an infrared transmitter and an infrared receiver on both sides of the door and window, and connect them to the control circuit. After power on, the control circuit starts to monitor the return signal of the infrared receiver in real time. By default, the device works in the automatic door light mode;

(2) If it is not detected that the function switching button (or the function switching button on the remote control) is pressed, the control circuit does not open the door and window security function of the device. The device will work in the automatic door light mode; if the function switching button or button is pressed once, the control circuit will automatically open the door and window security function. At this time, the blue LED near the above-mentioned button is lit to indicate that the door and window security function of the device has been turned on. At this time, the door and window safety device starts to work;

(3) The infrared receiver can normally receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a high-level signal, and the control circuit judges that the door and window are closed. At this point, the device is in a normal monitoring state until step (4);

(4) If a gangster breaks open or breaks the door and window to enter, once the infrared receiver cannot receive the infrared rays emitted by the infrared transmitter, it will return a low-level signal to the control circuit. The control circuit immediately triggers the alarm buzzer to sound and the red alarm lamp to flash, and at the same time send 2 alarm text messages to the preset mobile phone number through the GSM communication module;

(5) The sound and light alarm will continue until the alarm cancel button is pressed manually or the alarm cancel button on the remote control, and the device will automatically return to step (2);

(6) In the event of a city power outage, the system will automatically switch to lithium battery power and continue to work normally. The device will stop working when the system power is turned off or the lithium battery stops supplying power for too long.

Description of drawings

Fig. 1 is the " cat's eye " anti-theft principle diagram of the embodiment of the present invention;

Fig. 2 is the schematic diagram of the remote alarm of the embodiment of the present invention;

Fig. 3 is a schematic diagram of an automatic door lamp according to an embodiment of the present invention;

Fig. 4 is the schematic diagram of the security alarm of the embodiment of the present invention;

5 is a schematic diagram of emergency lighting according to an embodiment of the present invention;

Fig. 6 is the overall frame diagram of the device;

Figure 7 is a detailed diagram of the system hardware connection;

Figure 8 shows the infrared transceiver unit and single-chip microcomputer circuit (μC in the figure refers to the single-chip microcomputer);

Figure 9 is the main work flow chart;

Figure 10 is a flow chart of power management;

Figure 11 is a physical diagram of the device;

Figure 12 is a diagram of the automatic door light verification experiment;

Figure 13 is a security alarm verification experiment diagram;

Figure 14 is the emergency lighting verification experiment;

Among them, 101, doors and windows 102, walls 103, cat's eye 201 control circuit 202/204 infrared transmitter 203/205 infrared receiver 206, lithium battery 301, lighting beads 302, alarm light 402, cat's eye theft tool 502, mobile phone.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

1 principle

This device has five functions of "cat's eye" 103 anti-theft, remote alarm, automatic door light, security alarm and emergency lighting. The corresponding principles are introduced below.

1.1 Anti-theft principle of "Cat's Eye" 103

"Cat's eye" 103 theft all is to destroy "cat's eye" 103 earlier, inserts special-purpose unlocking tool from the cat's eye then. We only need to install a pair of infrared receivers and transmitters (202, 203) on both sides of the cat's eye 103 respectively, and make the infrared light pass through the center of the cat's eye 103. As long as a foreign object is inserted from the "cat's eye" 103, the transmission of infrared light is immediately blocked. The control circuit 201 monitors the infrared receiver 203 in real time, and immediately triggers an alarm of sound and light (302 is an alarm light) once no infrared is received. The principle of "Cat's Eye" 103 anti-theft is shown in Figure 1.

It should be noted that the lockpicking tool inserted into the "cat's eye" 103 is generally not large. In order to make the infrared transmission 100% blocked by the inserted tool, the infrared transceiver (202, 203) must be installed within the range of 103 10 cm away from the "cat's eye", and the width of the emitted beam must not exceed 0.5 cm .

1.2 Remote alarm principle

In order to increase the practicability of this product and improve the level of product security, the designer has added a remote alarm function. The device is embedded with a GPRS communication module, and is connected with the processor of the control circuit 201 .

Once an alarm situation occurs, the processor sends the alarm situation to the user's mobile phone 502 in the form of a short message at the first time through the GPRS communication module. The police information includes: "Maoyan" 103 theft or lock picking theft, the time of the incident, the working status of the system, etc. Even, the user can store the home address and the police SMS number in the single-chip microcomputer in advance, and directly send the alarm text message to the police station alarm platform when an alarm occurs.

In addition, the user can also send text messages to the device to control its working status: the opening and closing of the security function, the elimination of the alarm, etc.

1.3 Principle of automatic door light

The schematic diagram of the automatic lighting door lamp is shown in Figure 3. An infrared transmitter 204 is installed on the left (or right) wall 102 of the door and window 101 , and an infrared receiver 205 is installed on the right (or left) of the door and window 101 . When the door and window 101 are closed, the infrared receiver 205 can receive the light signal of the transmitter 204; when the door and window 101 is opened, the receiver 205 cannot receive the light signal. In this way, the switch state of the door and window 101 can be automatically distinguished. The control circuit 201 detects the receiver 205 in real time, and automatically turns on the door light 301 once the door and window 101 are found to be opened. In order to save energy consumption, this function only works at night or when the light is not strong.

1.4 Security alarm principle

Security protection needs to be comprehensive, and "cat's eye" 103 anti-theft is not enough. What if a thief pries open the door and breaks the window to enter the room to commit crimes? For this reason, the device adds security alarm function in addition. The schematic diagram of the security alarm is shown in Figure 4. The premise of using this function is to change the working mode of the device to security mode. When the doors and windows 101 have not been invaded, the infrared receiver 205 can normally receive the optical signal of the infrared transmitter 204; once a thief breaks in, it will block the infrared rays, and the receiver 205 will trigger the control circuit 201 when the infrared rays are not received. 201 will immediately turn on the sound and light alarm to give an alarm. This is a single-trigger mode, even if the infrared ray transmission and reception turns to normal after the thief leaves the window, the alarm will keep sounding until the alarm is disarmed manually through a button or remote control.

1.5 Principles of emergency lighting

The schematic diagram of emergency lighting is shown in Figure 5. In order to achieve uninterrupted work around the clock, this device adopts a dual power supply scheme of mains power and lithium battery 206. When the commercial power is available, the device is powered by the commercial power; when the commercial power fails, the relay coil is released and automatically switches to the battery 206 for power supply. At night or under poor lighting conditions, the device automatically turns on the door lamp 301 to provide emergency lighting when the power fails.

The control circuit 201 detects the lithium battery voltage in real time. When the voltage is lower than 3.5V, the battery discharge is prohibited and the battery 206 is automatically charged; when the voltage is higher than 4.2V, the charging is completed, and the control circuit 201 stops charging the battery 206 and allows The battery 206 is discharged.

The device includes control circuit, two sets of infrared transceivers, GPRS communication module, light detection module, lighting beads, sound and light alarm, lithium battery, remote control and power adapter, etc. The control circuit includes a single-chip microcomputer circuit, a lithium battery voltage detection circuit, a lithium battery charging circuit, a remote control response circuit, a lamp bead drive circuit, and a serial communication interface circuit. The overall block diagram is shown in Figure 6, and the detailed diagram of the hardware connection is shown in Figure 7.

The infrared transceiver module (infrared transceiver unit) includes two pairs of infrared transmitters and infrared receivers, the first pair of infrared transmitters and infrared receivers are respectively installed on the doors on both sides of the cat's eye, and the infrared light emitted by the infrared transmitter passes through the In the center of the cat's eye, when a foreign object is inserted from the cat's eye, the transmission of infrared light will be blocked immediately; the second pair of infrared transmitters and infrared receivers are respectively installed on the walls on both sides of the door, and when the door is opened, the outside The propagation of light is immediately blocked; the infrared transceiver module, light detection module, remote communication module, lighting lamp bead, and sound and light alarm are respectively connected with the control circuit.

The power supply mode of the control circuit is two kinds of remote controllers, the mains electricity and the lithium battery, and the working state of the control circuit is controlled by the remote controller.

The remote communication module of the control circuit sends information to the remote terminal; the remote terminal is a mobile phone.

The remote terminal can send control instructions to the control circuit through the remote communication module to control the opening and closing of the control circuit, and the elimination of the alarm.

The device also includes a light detection module installed on the window, a lighting lamp bead and a pair of infrared emitters and infrared receivers installed on both sides of the window, the light detection module, the infrared emitter and the infrared receiver are respectively connected with the control circuit.

The single-chip microcomputer detects the power of the lithium battery through the lithium battery voltage detection circuit. If the power is lower than the preset value, the lithium battery charging circuit is controlled to charge the lithium battery; the mains supplies power to the voltage detection circuit, the charging circuit and the power supply circuit of the control circuit through the adapter. , wherein the lithium battery and the mains are connected to the power circuit through a relay.

The control circuit receives the signal of the remote controller through the remote control transponder, and can also receive control commands through the keys on the control circuit board.

The remote communication module communicates with the microcontroller through the serial communication interface circuit.

In the control method of the infrared scanning multifunctional cat's eye security device, the control circuit detects whether the infrared rays are blocked, and if it is blocked, the sound and light alarm is controlled to alarm, and the lighting lamp beads are started at the same time, and the alarm information is sent to the remote communication module. Remote terminal; the control circuit receives the control information of the remote control or the buttons on the control circuit board or the remote terminal, and executes corresponding instructions. The control information includes turning on and off the sound and light alarm and lighting beads; the control circuit passes lithium The battery voltage detection circuit detects the power of the lithium battery. If the power is lower than the preset value, the lithium battery charging circuit is controlled to charge the lithium battery; if the mains power is cut off, the lithium battery is started to supply power.

When the control circuit detects that the infrared rays are blocked, the light detector is activated, and the light detector controls the opening and closing of the lighting beads.

In the automatic door light mode, install an infrared transmitter and an infrared receiver (shared with the door and window security function) on the walls or door frames on both sides of the door (based on the principle of easy installation and not blocking infrared transmission). When the door is closed, the infrared receiver can receive the light signal of the infrared transmitter; when the door is opened, the receiver cannot receive the light signal. The control circuit monitors the return signal of the infrared receiver in real time, and once the door is found to be opened, the door light is automatically turned on. The specific steps of this method are as follows:

(1) Install an infrared transmitter and an infrared receiver on both sides of the door respectively, and connect them to the control circuit. After power on, the control circuit starts to monitor the return signal of the infrared receiver in real time;

(2) The infrared receiver can normally receive the infrared rays emitted by the infrared transmitter, the infrared receiver returns a high-level signal, and the control circuit judges that the door is closed. At this point, the device is in a normal monitoring state until step (3);

(3) If the door is opened, the infrared receiver cannot receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a low-level signal. The control circuit determines that the door has been opened, and immediately lights up the LED lighting beads until step (4);

(4) If the door is closed again, the infrared receiver can receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a high level signal. The control circuit judges that the door has been closed, and immediately turns off the LED lighting beads. The device returns to the state of step (2);

(5) In the event of a city power outage, the system will automatically switch to lithium battery power and continue to work normally. The device will stop working when the system power is turned off or the lithium battery stops supplying power for too long.

Infrared scanning door and window security method

It is not enough to have "cat's eye" anti-theft in security work. What if a thief pries open the door and breaks the window to enter the room to commit crimes? For this kind of alarm situation, the present invention proposes the infrared scanning type door and window security method. Infrared scanning door and window security is to install infrared transmitters and infrared receivers on the walls or door frames on both sides of the door (shared with the automatic door light function). When the door and window are closed, the infrared receiver can receive the light signal of the infrared transmitter; when the door and window are opened, the receiver cannot receive the light signal. The control circuit monitors the return signal of the infrared receiver in real time. Once the door and window are found to be opened, it will automatically alarm with sound and red flashing light, and automatically send an alarm message to the pre-stored mobile phone number through the GSM communication module. The specific steps of this method are as follows:

(1) Install an infrared transmitter and an infrared receiver on both sides of the door and window, and connect them to the control circuit. After power on, the control circuit starts to monitor the return signal of the infrared receiver in real time. By default, the device works in the automatic door light mode;

(2) If it is not detected that the function switching button (or the function switching button on the remote control) is pressed, the control circuit does not open the door and window security function of the device. The device will work in the automatic door light mode; if the function switching button or button is pressed once, the control circuit will automatically open the door and window security function. At this time, the blue LED near the above-mentioned button is lit to indicate that the door and window security function of the device has been turned on. At this time, the door and window safety device starts to work;

(3) The infrared receiver can normally receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a high-level signal, and the control circuit judges that the door and window are closed. At this point, the device is in a normal monitoring state until step (4);

(4) If a gangster breaks open or breaks the door and window to enter, once the infrared receiver cannot receive the infrared rays emitted by the infrared transmitter, it will return a low-level signal to the control circuit. The control circuit immediately triggers the alarm buzzer to sound and the red alarm lamp to flash, and at the same time send 2 alarm text messages to the preset mobile phone number through the GSM communication module;

(5) The sound and light alarm will continue until the alarm cancel button is pressed manually or the alarm cancel button on the remote control, and the device will automatically return to step (2);

(6) In the event of a city power outage, the system will automatically switch to lithium battery power and continue to work normally. The device will stop working when the system power is turned off or the lithium battery stops supplying power for too long.

2.1 Infrared transceiver unit

Infrared (Infrared) is an electromagnetic wave with a wavelength between microwaves and visible light. Its wavelength is between 760nm and 1mm, and it is an invisible light with a wavelength longer than red light. This device adopts infrared transmitter TSAL6200 and infrared receiver HS0038B of German VISHAY company, which have low voltage, low power consumption and wide application. Their circuit with the microcontroller is shown in Figure 8.

When the infrared receiver HS0038B can receive the infrared light emitted by the transmitter TSAL6200, its first pin outputs a high voltage (5V), otherwise it outputs a low voltage (0V). Once the single-chip microcomputer μC detects that the first pin of the receiver outputs a low voltage, it determines that the doors and windows are opened or someone has invaded illegally.

2.2 Microcontroller

STC12LE5608AD is a single machine cycle (1T) single-chip microcomputer produced by China STC Company. It is a new generation of 8051 single-chip microcomputer with high speed, low power consumption and super anti-interference. The instruction code is completely compatible with the traditional 8051, but the speed is 8-12 times faster. The STC12LE5608AD single-chip microcomputer is powered by 3.3V voltage, with lower power consumption, and integrates 8 high-speed 10-bit A/D converters inside.

2.3 GPRS communication module

WF-SIM900A is the serial port GSM/GPRS module of Wildfire Company, which adopts SIM900A module solution of SIMCOM Company. WF-SIM900A can transmit standard AT commands through the serial port to control the module, and can provide user products with simple and convenient GSM voice, SMS and GPRS data communication functions.

2.4 Buttons

This device has 4 physical buttons, including 1 power switch button, 3 function buttons: working mode switch (Shift) button, alarm elimination (Remove) button and emergency lighting control (LED Switch) button.

The Shift button can switch the working mode of the device: door light mode and security mode; the Remove button is used to eliminate the sound and light alarm; the LED Switch is used to manually turn on or off the door light.

2.5 lithium battery

This device uses a 3.7V, 1500mAh lithium-ion battery. The fully charged voltage is 4.2V, and the discharge protection voltage is 3.5V. The working voltage of the device is 3.3V, the working current is 100mA, and the voltage conversion efficiency is 85%. The battery can power the device for 14 hours (3.7V*1500mAh*85% / (3.3V*100mA)=14.3h).

2.6 Remote control

This device adopts high-frequency electromagnetic wave (315MHz) remote control communication mode. There are 4 buttons on the remote control: A, B, C and D, and only 3 of them are used here: B, C and D. The B button corresponds to the remove alarm (Remove) button described in Section 2.3. The C button corresponds to the working mode switch (Shift) button, and the D button corresponds to the emergency lighting control (LED Switch) button.

The remote control and remote control response circuit of the device can be set with an 8-digit binary hardware password to make the remote control more secure and reliable.

2.7 Power circuit

This device uses 3.3V voltage except for battery charging circuit and relay which use DC 5V voltage. Therefore, the core part of the power supply circuit is to convert AC 220V and battery voltage into 3.3V voltage.

Mains 220V is first converted to DC 5V by a power adapter, input to the 5V socket of the control circuit board, and then converted to DC 3.3V by a three-terminal voltage regulator LM1117-3.3.

The battery voltage is between DC 3.5V and 4.2V, which is converted into DC 3.3V by using the power chip TPS7333Q of Texas Instruments.

3.1 Device workflow

In order to better let everyone understand the function and usage of this device, first introduce the working process of this device. The introduction is divided into two parts: one is the main work process, including the implementation steps of main functions such as "cat's eye" anti-theft, remote alarm, automatic lighting of door lights, security alarm and emergency lighting; the other is the power management process, including power switching and voltage monitoring and battery charge and discharge management.

The main workflow is shown in Figure 9. There are 4 parallel main lines: "cat's eye" anti-theft process, general security process, automatic door light process and emergency lighting process. (1) The "cat's eye" anti-theft process realizes the "cat's eye" anti-theft and remote alarm function: first detect whether there is foreign matter inserted into the cat's eye, and if so, turn on the sound alarm and red alarm light, otherwise continue to detect whether there is foreign matter inserted into the cat's eye. The "cat's eye" alarm will be released only when the alarm release button (Remove key) is manually pressed. (2) The security alarm process realizes ordinary security functions: firstly, it detects whether the doors and windows are opened, and if so, turns on the sound alarm and the red alarm light, otherwise, continues to detect the switch status of the doors and windows. The security alarm can only be disarmed only when the disarming alarm button (Remove health) is manually pressed. (3) Automatic door light process: first check whether the door and window are opened, if so, check whether the light is dark enough, otherwise continue to check the status of the door and window switch. The door light will only come on in dim light and the door is open. (4) Emergency lighting process: No matter what mode the device is working in, once the mains power fails and the ambient light is dim, the door light will be turned on immediately to provide emergency lighting. In addition, the emergency lighting button (LED Switch button) can independently control the lighting and extinguishing of the door lights.

The power management process is shown in Figure 10. When the mains power fails, it will automatically switch to the lithium battery for power supply, otherwise it will use the mains power. Regardless of power failure or not, the device monitors the battery voltage in real time. If the voltage is lower than 3.5V, the battery will stop discharging and charge the battery until the battery voltage returns to 4.2V.

3.2 "Cat's eye" anti-theft function

The "cat's eye" anti-theft function is automatically turned on 24 hours without any setting. After an alarm occurs and the alarm is cancelled, the device will automatically switch to the "cat's eye" monitoring state to continue to protect the safety of users.

3.3 Remote alarm function

GSM/GPRS communication module WF-SIM900A supports standard AT commands, and the single-chip microcomputer can send more than 190 kinds of AT commands to WF-SIM900A through the serial port to meet various communication requirements. This device mainly uses AT commands related to short messages, and there are 16 types in total. For example: AT+CMGR is an instruction to read a short message, AT+CMGS is an instruction to send a short message, AT+CMGD is an instruction to delete a short message.

When a police situation occurs, the single-chip microcomputer immediately sends the police situation to the user's mobile phone in the form of a text message or directly to the alarm platform of the police station. In addition, the user can also use the mobile phone to send a short message in a certain format to the device to set the working status of the device.

3.4 Automatic door light function

Toggle the working mode button (Shift key) to make it in the position of automatic door light mode. Once the door is opened and under poor lighting conditions such as night or rainy days, the device will automatically turn on the door light. After the door is closed, the door light turns off automatically.

3.5 Security alarm function

Toggle the working mode button (Shift key) to make it in the security mode gear. The blue LED next to the Shift key will be lit at the same time, indicating that the identification device is currently working in the security alarm mode to distinguish it from the automatic door light mode. Once the door is opened, the unit lights up a red warning light and an audible siren. If you want to remove the alarm, you only have to press the button to remove the alarm (Remove health) or the B key on the remote control.

3.6 Emergency lighting function

There is no need to toggle any buttons or switches, no matter what mode the device works in, once the mains power fails and it is in poor lighting conditions such as night or rainy days, the device will automatically turn on the door light. In addition, the emergency lighting button (LED Switch button) can independently control the lighting and extinguishing of the door lights.

4. Product use verification experiment records

The physical picture of the device is shown in Figure 11. The core parts include: infrared radiation circuit, high-power LED, lithium battery, remote control, control circuit, power management circuit, alarm device, buttons and light sensor.

Since the verification experiment is carried out during the daytime, we cover the probe of the light sensor to simulate the situation of poor lighting. When the door is opened, the white high-power LED lights up automatically.

The experiment is shown in Figure 12: in Figure 12(a) the light sensor is not blocked, simulating a daytime environment, and the door light is not on; in Figure 12(b), the light sensor is blocked, simulating a night environment, and the door light is automatically turned on.

Verify security alarm function

First press the mode switching button (Shift key) to change the system working mode to security alarm mode.

Then utilize the aiming state simulation door of infrared to shoot circuit to be in closed state, this device is in guarding guard state, and warning light and sound alarm all do not report to the police, as shown in Figure 13 (a);

Finally, using the misalignment state of the infrared beam-to-radio circuit to simulate that the door is in an open state, the device immediately considers that an alarm has occurred, lights up the red high-power LED, and sounds a high-decibel sound alarm, as shown in Figure 13(b).

Verify emergency lighting functionality

First press the mode switching button (Shift key) to change the system working mode to automatic door light mode.

When the mains power supply is normal, the device will automatically give priority to using the mains power supply. At this time, the door light will not light up when the light is good and the door is closed. As shown in Figure 14(a);

When the mains power fails, the device automatically switches to battery power supply. At this time, under poor lighting conditions, the door light will automatically light up immediately, regardless of whether the door is opened or not. As shown in Figure 14(b).

Innovation

(1) "Cat's Eye Theft" nemesis. As long as the infrared transceiver unit of the device is installed on the level line with the peephole of the anti-theft door, the "peephole theft" can be alarmed 100% of the time. Because once an object enters through the cat's eye, it will block the infrared transmission and reception, and then trigger the sound and light alarm.

(2) Remote alarm and remote control. The first time an alarm occurs, the user can receive the alarm message sent by the device, which couldn't be more timely. Even, the user can store the home address and the police SMS number in the single-chip microcomputer in advance, and directly send the alarm text message to the police station alarm platform when an alarm occurs.

(3) Infrared detection is more accurate and humane. Under normal circumstances, the infrared detection method can accurately detect the switch status of doors and windows; when encountering a situation where criminals break into the door and window (the frame of the door and window has not been damaged but suffered illegal intrusion), the infrared detection method also works, and it is like a magnetic or mechanical switch. Other detection methods are powerless.

(4) The five practical functions are integrated, safe and economical. The alarm unit and the automatic door light share the infrared detection unit, which provides additional security protection and is more economical than purchasing an alarm separately.

(5) Self-contained lithium battery, automatic power switching and battery maintenance, more considerate. When the mains power fails, the device automatically switches to the lithium battery for power supply, and it works 24 hours a day without interruption. Real-time monitoring of battery voltage, automatic charging when the battery is dead, truly maintenance-free.

(6) The emergency lighting will automatically turn on when the power is off, and it can also be controlled manually. The emergency lighting is automatically turned on when the power is off, and it is automatically turned off when it comes to the point. It can also be controlled manually with one button to provide an extra layer of protection.

(7) All physical button functions can be controlled remotely. In addition to being controlled by the buttons on the device, the working mode switching, alarm removal and lighting switch can also be realized by the remote control, which is convenient to use.

Claims (10)

1. An infrared scanning type multifunctional cat's eye security device, comprising a cat's eye, is characterized in that, also includes: an infrared transceiver module, a light detection module, a remote communication module, a lighting lamp bead, an audible and visual alarm and a control circuit; The transceiver module includes two pairs of infrared transmitters and infrared receivers, wherein the first pair of infrared transmitters and infrared receivers are respectively installed on the doors on both sides of the cat's eye, and the infrared light emitted by the infrared transmitter passes through the center of the cat's eye. When a foreign object is inserted through the cat's eye, the transmission of infrared light is immediately blocked; the second pair of infrared emitters and infrared receivers are respectively installed on the walls on both sides of the door, and when the door is opened, the transmission of external light is immediately blocked. Blocking: the infrared transceiver module, light detection module, remote communication module, lighting lamp bead, and sound and light alarm are respectively connected to the control circuit. 2. infrared scanning type multifunctional cat's eye security device as claimed in claim 1, is characterized in that: the power supply mode of described control circuit is two kinds of remote controllers of commercial power and lithium battery, controls the working state of control circuit by remote controller; The remote communication module of the control circuit sends information to the remote terminal; the remote terminal is a mobile phone; the remote terminal can send control instructions to the control circuit through the remote communication module to control the opening and closing of the control circuit, and the elimination of alarms. 3. Infrared scanning type multifunctional cat's eye security device as claimed in claim 1, is characterized in that: described first pair of infrared transmitter and infrared receiver are respectively installed in the scope apart from cat's eye 10 centimeters, and will guarantee the emission The beam width does not exceed 0.5 cm. 4. The infrared scanning multifunctional cat's eye security device as claimed in claim 1, characterized in that: the device also includes a light detection module installed on the window, a lighting lamp bead and a pair of infrared emitters installed on both sides of the window and the infrared receiver, the light detection module, the infrared emitter and the infrared receiver are respectively connected with the control circuit. 5. The infrared scanning multifunctional cat's eye security device as claimed in claim 1, wherein the control circuit includes a single-chip microcomputer, a lithium battery voltage detection circuit, a lithium battery charging circuit, a remote control response circuit, a lamp bead drive circuit, a string line communication interface circuit, etc.; the single-chip microcomputer detects the electric quantity of the lithium battery through the lithium battery voltage detection circuit, if the electric quantity is lower than the preset value, controls the lithium battery charging circuit to charge the lithium battery; The power circuit of the circuit and the control circuit is powered, wherein the lithium battery and the mains are connected to the power circuit through a relay. 6. infrared scanning type multifunctional cat's eye security device as claimed in claim 1, is characterized in that: described control circuit receives the signal of remote controller by remote control transponder, can also receive control instruction by the button on control circuit board; The remote communication module communicates with the single-chip microcomputer through the serial communication interface circuit; the control circuit controls the lighting lamp bead and the sound and light alarm to be turned off and on through the power drive circuit. 7. A control method for an infrared scanning multifunctional cat's eye security device, characterized in that: the control circuit detects whether the infrared ray is blocked, if blocked, then controls the sound and light alarm to alarm, starts the lighting lamp bead simultaneously, and turns the The alarm information is sent to the remote terminal through the remote communication module; the control circuit receives the control information from the remote controller or the buttons on the control circuit board or the remote terminal, and executes the corresponding instructions. The control information includes turning on and off the sound and light alarm and lighting. Bead; the control circuit detects the power of the lithium battery through the lithium battery voltage detection circuit, if the power is lower than the preset value, controls the lithium battery charging circuit to charge the lithium battery; if the mains power failure starts the lithium battery to supply power. 8. The control method of the infrared scanning type multifunctional cat's eye security device as claimed in claim 7, is characterized in that: when the control circuit detects that the infrared rays are blocked, the light detector is started, and the light detector controls the opening and closing of the lighting lamp bead. close. 9. The control method of the infrared scanning multifunctional cat's eye security device as claimed in claim 7, characterized in that: in the automatic door light mode, on the walls or door frames on both sides of the door (based on the principle of easy installation and not blocking infrared transmission) ) respectively install an infrared transmitter and an infrared receiver (shared with the door and window security function); when the door is closed, the infrared receiver can receive the light signal of the infrared transmitter; when the door is opened, the receiver cannot receive the light signal; The control circuit monitors the return signal of the infrared receiver in real time, and once the door is found to be opened, the door light is automatically turned on; the specific steps of this method are as follows: (1) Install an infrared transmitter and an infrared receiver on both sides of the door, and connect them to the control circuit; after power on, the control circuit starts to monitor the return signal of the infrared receiver in real time; (2) The infrared receiver can normally receive the infrared rays emitted by the infrared transmitter, the infrared receiver returns a high-level signal, and the control circuit judges that the door is closed; at this time, the device is in a normal monitoring state until step (3); (3) If the door is opened, the infrared receiver cannot receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a low-level signal; the control circuit determines that the door has been opened, and immediately lights up the LED lighting beads until step ( 4); (4) If the door is closed again, the infrared receiver can receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a high-level signal; the control circuit determines that the door has been closed, and immediately turns off the LED lighting beads; the device returns to the state of step (2); (5) In case of a city power outage, the system will automatically switch to lithium battery power supply and continue to work normally; when the system power supply is turned off or the lithium battery stops supplying power for too long, the device will stop working. 10. The control method of the infrared scanning type multifunctional cat's eye security device as claimed in claim 7, characterized in that: in the infrared scanning type door and window security method, the infrared scanning type door and window security is to install infrared rays on the walls or door frames on both sides of the door. Transmitter and infrared receiver (shared with the automatic door light function); when the door and window are closed, the infrared receiver can receive the light signal of the infrared transmitter; when the door and window are opened, the receiver cannot receive the light signal; the control circuit real-time Monitor the return signal of the infrared receiver, once the door and window are found to be opened, it will automatically alarm with sound and red flashing light, and automatically send an alarm message to the pre-stored mobile phone number through the GSM communication module; the specific steps of this method are as follows: (1) Install an infrared transmitter and an infrared receiver on both sides of the door and window, and connect them to the control circuit; after power on, the control circuit starts to monitor the return signal of the infrared receiver in real time. By default, the device works at Automatic door light mode; (2) If the function switching button (or the function switching button on the remote control) is not detected to be pressed, the control circuit will not open the door and window security function of the device; the device will work in the automatic door light mode; if the function switching button or button is pressed Once, the control circuit will automatically open the door and window security function; at this time, the blue LED near the above button is lit to indicate that the door and window security function of the device has been opened; at this time, the door and window security device starts to work; (3) The infrared receiver can normally receive the infrared rays emitted by the infrared transmitter, and the infrared receiver returns a high-level signal, and the control circuit judges that the door and window are closed; at this time, the device is in a normal monitoring state until step (4); (4) If a criminal breaks open or breaks the door and window, once the infrared receiver fails to receive the infrared rays emitted by the infrared transmitter, it will return a low-level signal to the control circuit; the control circuit will immediately trigger the alarm buzzer to sound and red The alarm lamp bead flashes, and at the same time, 2 alarm text messages are sent to the preset mobile phone number through the GSM communication module; (5) The sound and light alarm will continue until the alarm cancel button is pressed manually or the alarm cancel button on the remote control, and the device will automatically return to step (2); (6) In case of a city power outage, the system will automatically switch to lithium battery power supply and continue to work normally; when the system power supply is turned off or the lithium battery stops supplying power for too long, the device will stop working.