CN106210666B

CN106210666B - Camera fault switching device and method

Info

Publication number: CN106210666B
Application number: CN201610783976.XA
Authority: CN
Inventors: 鲁美艳; 周坤; 刘昌界; 易磊磊; 管丽
Original assignee: Bozhou Power Supply Co of State Grid Anhui Electric Power Co Ltd
Current assignee: Bozhou Power Supply Co of State Grid Anhui Electric Power Co Ltd
Priority date: 2016-08-30
Filing date: 2016-08-30
Publication date: 2022-06-21
Anticipated expiration: 2036-08-30
Also published as: CN106210666A

Abstract

The invention provides a camera fault switching device which comprises a plurality of cameras, wherein the cameras are respectively connected with relays for controlling the power supply of the cameras one by one, and a control unit for detecting the fault state of the cameras in work, generating a low-level judgment signal in response to the detected fault state and controlling the disconnection of the relays connected with the cameras in the work which are damaged and the connection of the relays connected with other cameras capable of working normally. Monitoring is carried out by setting a multi-camera combined working mode, the cameras shoot in work at the same moment, and other cameras are standby cameras, wherein the control unit detects the state of the cameras in work in real time, and immediately switches to other cameras when a fault occurs, so that the cameras are ensured to monitor all the time, real-time and efficient monitoring is realized, and the interruption monitoring caused by the fault of the cameras is avoided.

Description

Camera fault switching device and method

Technical Field

The invention relates to the field of security monitoring, in particular to a camera fault switching device and method.

Background

With the rapid development of society, security monitoring equipment is more and more concerned by people. However, the monitoring camera is a main component in the monitoring equipment, and works continuously for 24 hours. Once the camera breaks down, effective shooting cannot be guaranteed, and loss which cannot be measured may be brought.

Disclosure of Invention

The invention aims to solve the technical problem that effective monitoring cannot be carried out after a camera fails.

The invention is realized by the following technical scheme:

the utility model provides a camera fault switching device, including a plurality of cameras, a plurality of cameras are connected with the relay that is used for controlling the camera power supply one by one respectively, and be arranged in detecting the fault condition of camera in the work and be used for producing low level decision signal and control the relay that the camera was connected in the work that has damaged disconnection and the control unit of the switch-on of the relay that other cameras that can normally work were connected, the input and the control unit of relay are connected, the output and the camera of relay are connected, the output and the control unit of camera are connected.

Further, the device also comprises an indicator light connected with the control unit and used for responding to the low-level decision signal.

Further, the device also comprises a power supply which is connected with the relay and supplies power to the relay.

Further, the control unit comprises a microcontroller.

Further, the control unit further comprises a power-on reset circuit connected with a signal input end RST pin of the microcontroller and used for power-on reset, an external clock circuit connected with signal input ends X1 and X2 pins of the microcontroller and used for controlling clock supply, and a power supply filter circuit connected with a signal input end VCC pin of the microcontroller and used for filtering.

Furthermore, a pin of the microcontroller AD0 is connected with a video output pin of the camera through a wire P1.

A camera fault switching method of the device comprises the following steps:

(1) an AD0 pin in the microcontroller monitors a video output port level signal of the camera;

(2) when the microcontroller judges that the level signal is not in the normal range, the microcontroller generates a low level judgment signal;

(3) responding to the low-level judgment signal, and switching off a relay connected with the damaged middle-working camera and switching on relays connected with other cameras capable of working normally;

(4) after the relays connected with the other cameras capable of working normally are switched on, the other cameras capable of working normally start to work.

Further, the LED lamp also comprises an indicator light circuit connected with a P22 pin of the microcontroller, and when the indicator light circuit receives a low-level signal output by the microcontroller, a lamp in the indicator light circuit is lightened.

The invention provides a camera fault switching device which is provided with a plurality of cameras to carry out monitoring in a combined working mode. Monitoring is carried out by setting a multi-camera combined working mode, the cameras shoot in work at the same moment, and other cameras are standby cameras, wherein the control unit detects the state of the cameras in work in real time, and immediately switches to other cameras when a fault occurs, so that the cameras are ensured to monitor all the time, real-time and efficient monitoring is realized, and the interruption monitoring caused by the fault of the cameras is avoided. The camera is automatically detected in real time through the control unit, and the automation and the intelligence of monitoring are improved. The relay in the device plays the role of automatically adjusting and safely protecting the camera. The camera damage indication in the original work is given through the indicating lamp, the camera in the original work is prompted to have a fault, the camera needs to be replaced in time, and therefore the monitoring is ensured to be continuously carried out.

Drawings

FIG. 1 is a block diagram of the circuit structure of the apparatus;

FIG. 2 is a circuit schematic of the control unit;

FIG. 3 is a schematic diagram of a circuit for detecting camera status;

FIG. 4 is a schematic circuit diagram of a relay controlled camera;

fig. 5 is a circuit schematic of the indicator light.

Detailed Description

Camera fault auto-change over device, including a plurality of cameras, a plurality of cameras are connected with the relay that is used for controlling the camera power supply respectively one by one, and be arranged in detecting the fault condition of camera in the work and be used for producing low level judgement signal and control the relay's that the camera is connected in the work disconnection that has damaged and the control unit of the switch-on of the relay that other cameras that can normally work are connected in response to the fault condition that detects, the input and the control unit of relay are connected, the output and the camera of relay are connected, the output and the control unit of camera are connected. The number of the cameras is multiple, and the cameras comprises more than two cameras, preferably two cameras, three cameras or four cameras.

The present invention will be described with reference to specific examples.

Fig. 1 shows a block diagram of a circuit configuration of the camera trouble-shooting device, and the camera trouble-shooting device 100 includes: the control unit 301, the first relay 201 and the second relay 202 that are connected with the control unit 301 output, the output of first camera 101 is connected with the control unit 301, the output of second camera 102 is connected with the control unit 301, pilot lamp 401 is connected with the output of control unit 301, the power supply of first camera 101 is controlled to first relay 201, the power supply of second camera 102 is controlled to second relay 202. A control unit 301 for detecting a failure state of the first camera 101 and for generating a low-level decision signal in response to the detected failure state, and controlling the opening of the first relay 201 and the opening of the second relay 202 according to the low-level decision signal.

Fig. 2 is a schematic circuit diagram of the control unit, the power-on reset circuit 3011, the external clock circuit 3012, and the power filter circuit 3013 are connected to the microcontroller 3014 to form the control unit 301, and the microcontroller 3014 is an STC12 microcontroller. The power-on reset circuit 3011 includes a capacitor C1 and a resistor R1 connected in series, where the RST pin of the power-on reset circuit is connected to the RST pin of the microcontroller 3014, and at the moment when the control unit 301 is powered on, the capacitor C1 is turned on, and a high-level signal is input to the RST pin of the power-on reset circuit 3011, thereby completing power-on reset. The external clock circuit 3012 includes a capacitor C1, a capacitor C2 and a crystal oscillator Y1, the pin X1 in the external clock circuit 3012 is connected to the pin X1 in the microcontroller 3014, and the pin X2 is connected to the pin X2 in the microcontroller. The VCC pins in the power-on reset circuit 3013 and the power supply filter circuit 3014 are connected to the VCC pin in the microcontroller, and the GND pins in the power-on reset circuit 3013 and the power supply filter circuit 3014 are connected to the GND pin in the microcontroller. The VCC pin in the power filter circuit 3013 is connected to the VCC pin in the microcontroller 3014, the GND pin is connected to the GND pin of the microcontroller 3014, and the capacitor C4 and the capacitor C5 in the power filter circuit 3014 filter the power. The entire control unit 301 is the control center of the camera fail-over device.

Fig. 3 is a schematic diagram of a circuit for detecting a camera state, an AD0 pin of the microcontroller 3014 is connected to a video output pin of the first camera 101 through a wire p1, where a plug at a wire p1 end is connected to the video output pin of the first camera 101, and the other end is connected to an AD0 pin of the microcontroller 3014. The microcontroller 3014 monitors for camera video output port level signal changes using the AD0 pin.

The camera fault switching control method comprises the following steps: an AD0 pin in the microcontroller 3014 monitors a first camera 101 video output port level signal; whether the level signal is in a normal range is judged through an analog-to-digital conversion circuit ADC in the microcontroller 3014, when the level signal is in the normal range, the first camera 101 works normally, when the level signal is not in the normal range, the microcontroller 3014 generates a low-level decision signal, the relay responds to the low-level decision signal, the first relay 201 is switched off, the second relay 202 is switched on, and after the second relay 202 is switched on, the second camera 102 starts monitoring work.

Fig. 4 is a schematic diagram of a relay control camera circuit, and a power supply 501 is connected to power pins of the first relay 201 and the second relay 202, respectively, and supplies power to the first relay 201 and the second relay 202. Resistors R2 and R3, diodes D1 and D2, and triodes Q1 and Q2 in the first relay 201 and the second relay 202 are all in the prior art. The pin P20 of the microcontroller 3014 is connected to the pin P20 of the first relay 201, the pin P21 of the microcontroller 3014 is connected to the pin P21 of the second relay 202, the pin power1 of the first relay 201 is connected to the first camera 101, and the pin power2 of the second relay 202 is connected to the second camera 102. Only the first relay 201 is initially closed and the first camera 101 is operating. When the control unit 301 detects that the currently operating camera is damaged, the control unit 301 sends a low-level decision signal, the switch k1 of the first relay 201 is turned off and the switch k2 of the second relay 202 is turned on, and the second camera 102 starts to operate.

Fig. 5 is a schematic diagram of the operation of the camera damage indicator 401, pin P22 of the circuit of the indicator 401 is connected to pin P22 of the microcontroller 3014, the circuit of the indicator 401 includes a lamp D3 and a resistor R4, and the lamp D3 may be a light emitting diode LED, an organic light emitting diode OLED, or another lamp with an indication function. After the cameras are switched, the pin P22 of the microcontroller 3014 outputs a low level signal, and the lamp D3 lights up to indicate that the first camera 101 used initially has failed. Those skilled in the art will appreciate that the terminal structures shown in fig. 1-5 are not intended to be limiting of the terminal, and may include more or less components than those shown, or some components in combination.

Claims

1. A camera fault switching device comprises a plurality of cameras and is characterized in that the cameras are respectively connected with relays for controlling the cameras to supply power and a control unit for detecting the fault state of the cameras in work, generating low-level judgment signals in response to the detected fault state, controlling the broken relays connected with the cameras in work to be disconnected and controlling the relays connected with other cameras capable of working normally to be connected, wherein the input end of each relay is connected with the control unit, the output end of each relay is connected with the camera, and the output end of each camera is connected with the control unit;

the device also comprises an indicator light which is connected with the control unit and is used for responding to the low-level decision signal;

the device also comprises a power supply which is connected with the relay and supplies power to the relay;

the control unit comprises a microcontroller; the control unit also comprises a power-on reset circuit connected with a signal input end RST pin of the microcontroller and used for power-on reset, an external clock circuit connected with signal input ends X1 and X2 pins of the microcontroller and used for providing a clock, and a power supply filter circuit connected with a signal input end VCC pin of the microcontroller and used for filtering;

and the pin AD0 of the microcontroller is connected with the video output pin of the camera in work through a lead P1.

2. A method of controlling the camera fail-over apparatus of claim 1, characterized by comprising the steps of:

(2) when the microcontroller judges that the level signal is not in the normal range, the microcontroller generates a low level judgment signal,

(3) responding to the low level judgment signal, and switching off a relay connected with the damaged working camera and switching on relays connected with other cameras capable of working normally;

3. The method of claim 2, further comprising the step of illuminating a light in the indicator light circuit when the indicator light circuit connected to pin P22 of the microcontroller receives a low signal from the microcontroller.