CN202424940U

CN202424940U - Multi-channel television signal monitoring and alarming device

Info

Publication number: CN202424940U
Application number: CN2011205252000U
Authority: CN
Inventors: 肖兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2012-09-05
Anticipated expiration: 2021-12-15

Abstract

The utility model provides a multi-channel television signal monitoring and alarming device which comprises an audio signal fault monitoring module, a video signal fault monitoring module, a transmitting power fault monitoring module, a main control module, a display module and an alarming module. The multi-channel television signal monitoring and alarming device is characterized in that the main control module is respectively connected with the audio signal fault monitoring module, the video signal fault monitoring module, the transmitting power fault monitoring module, the display module and the alarming module. The audio signal fault monitoring module, the video signal fault monitoring module and the transmitting power fault monitoring module can monitor audio, video and power of eight channels in real time at the same time and then send the monitored information to the main control module, the monitored information is subjected to calculating and logistic processing in the main control module and then is transmitted to the display module for display, and the alarming module gives an alarm when faults are detected.

Description

Multichannel TV signal monitoring alarm

Technical field

The utility model relates to a kind of TV signal monitoring alarm, especially multichannel TV signal monitoring alarm.

Background technology

In radio data system; Whether the operating state of transmitter normally is that can decision realize one of fault-free safety broadcast important indicator; Therefore need effectively monitor the input signal source and the power output of transmitter; So that in time find fault and send warning, switch to standby host work then immediately, thereby guarantee the normal broadcast of broadcast television signal.Since the 90's of 20th century, many technical staff research and develop this, but some function singleness; Can only detect audio signal or vision signal, some can only sensed power, though some is multiple functional; But the detection method imperfection often has false alarm to take place.

Summary of the invention

In order to overcome the problems referred to above, the utility model adopts advanced monitoring technology, can monitor in real time audio frequency, video and the power of 8 passages simultaneously, and realize fault alarm function.

The utility model provides a kind of multichannel TV signal monitoring alarm; Comprise audio signal malfunction monitoring module, vision signal malfunction monitoring module, transmitting power malfunction monitoring module, master control module, display module, alarm module, it is characterized in that: the master control module is connected with audio signal malfunction monitoring module, vision signal malfunction monitoring module, transmitting power malfunction monitoring module, display module, alarm module respectively.Audio signal malfunction monitoring module, vision signal malfunction monitoring module, transmitting power malfunction monitoring module can be monitored audio frequency, video and the power of 8 passages simultaneously in real time; Send to the master control module; The master control module is through calculating and logical process; Be sent to display module and show that when detecting fault, alarm module is reported to the police.

The beneficial effect of the utility model is, can detect simultaneously by multichannel, with cheap single-chip microcomputer as the control core, simplified control circuit design greatly, and improve its reliability and flexibility.

Description of drawings

Fig. 1 is the theory diagram of the utility model; Fig. 2 is the electric structure chart of the utility model.

Embodiment

In Fig. 1; The utility model provides a kind of multichannel TV signal monitoring alarm; Comprise audio signal malfunction monitoring module 1, vision signal malfunction monitoring module 2, transmitting power malfunction monitoring module 3, master control module 4, display module 5, alarm module 6, it is characterized in that: master control module 4 is connected 6 with audio signal malfunction monitoring module 1, vision signal malfunction monitoring module 2, transmitting power malfunction monitoring module 3, display module 5, alarm module respectively.Audio signal malfunction monitoring module 1, vision signal malfunction monitoring module 2, transmitting power malfunction monitoring module 3 can be monitored audio frequency, video and the power of 8 passages simultaneously in real time; Send to master control module 4; Master control module 4 is through calculating and logical process; Be sent to display module and show 5, when detecting fault, alarm module reports to the police 6.

Audio signal surge detection module is made up of the circuit of 5 same structures, and each output is through the parallel connection of diode (DC4, DC6 etc.) back; Have or logical relation; Have only 5 module outputs to be at 0 o'clock, and lasting 20s no signal, just can trigger late-class circuit and produce output.Vision signal malfunction monitoring module adopts MAX7452 video signal detection chip commonly used; Inside has 12 rank low filter, the video amplifier of 1 band AGC function, 1 black level clamp circuit; And have synchronizing signal missing detecting circuit etc. and partly form; When input signal just often in the LOS of chip (8 pin) output low level, and weak or when not having input, LOS exports high level when input signal.Transmitting power malfunction monitoring module partly is made up of detection, input mode transfer relay UC1, level adjustment potentiometer WC1 and A/D conversion etc.; When CH3-JIANBO-SET is high level; The relay common port links to each other with CH3-JIANBO; Circuit working is when the detection mode, and the power signal of CH3FWD input is coupled DC1 and DC2 rectification through CC1; Obtain DC component after the CC2 filtering and deliver to relay CH3-JIANBO end, after WC1 carries out dividing potential drop, send Chip Microcomputer A/D change-over circuit input again.Monitoring module monitors to signal send into the master control module; The master control module is a core with the MEGA2560 single-chip microcomputer of high performance Atmel company; Its inside has the Flash ROM of 256 kbyte and the RAM of 8 kbyte, nearly 86 programmable I/O mouths is arranged, built-in I2C; UART, the SPI multiple interfaces.Abundant I/O port can be used as the I/O pin of circuit such as LCD status lamp, the digital demonstration of LCD and the input of audio frequency and video power signal; The I2C interface can conveniently connect E2PROM, clock chip etc.; The instruction process speed of 16 MI/s (million VAX Instructions Per Second VAXs) can satisfy the fast detecting and the data processing of intelligent multichannel audio frequency and video power alarm; Send into display module after the processing and show related data; What display module adopted is to adopt 44780 LCD driven, and HD44780 (KS0062) is the extensive dot matrix lcd controller made from the Low-Power CMOS technology, links to each other with the 4bit/8bit microprocessor; It can make dot matrix LCD show the information that capital and small letter English alphabet, numbers and symbols etc. are abundant, has stronger versatility to use simultaneously.Under the situation of breaking down; The master control module controls alarm module is implemented to report to the police, and according to the broadcast television monitoring standard-required, delay time is set to 20 s; Alarm module by integration charging, voltage ratio, anti-phase amplification etc. partly constitutes; Through the adjustment circuit parameter, can use capacitor charging time is 20 s, thereby realizes the delayed alarm function of 20s.

Claims

1. the utility model provides a kind of multichannel TV signal monitoring alarm; Comprise audio signal malfunction monitoring module (1), vision signal malfunction monitoring module (2), transmitting power malfunction monitoring module (3), master control module (4), display module (5), alarm module (6), it is characterized in that: master control module (4) is connected with audio signal malfunction monitoring module (1), vision signal malfunction monitoring module (2), transmitting power malfunction monitoring module (3), display module (5), alarm module (6) respectively.