Tv system security and surveillance

 

(57) Abstract:

The invention relates to protective means for private residential and non-residential premises, open perimeters of warehouses, garages, administrative and industrial buildings, as well as intercoms. The technical result is the creation of television security systems and monitoring, ensuring the use of coaxial wiring collective antenna for transmission of a television signal to the television sets of observation points without creating interference to the signals of television broadcasting stations. The system includes a TV, cable distributors, surveillance unit, the matching node of a television signal, the supply cable, power supply cable, and the unit video camera, microphone, video Converter, amplifier, modulator, the control filter, controlled filter, a local oscillator, and the matching node television signal includes a frequency-independent attenuator amplitude equalizer and block mixing signal. 2 C. p. F.-ly, 1 Il.

The invention relates to protective means for private residential and non-residential premises, open perimeters of warehouses, garages, administrative and polavision camera coupled with the transmitter signals and power supply installed in a protected casing having a hole under the screen of the television camera and the input and output connectors for connecting wires (EN, GR, N 7225, CL G 08 B 13/196, published. 1998).

A disadvantage of the known system is that it is only used as a monitor unauthorized trespassing on a protected object.

The closest technical solution to the claimed invention is a television system, security and surveillance, including installed at the observation points TVs, connected by a cable with a collective television antenna through the cable distributors, and installed, at least one protected object unit of the video containing a video camera, microphone, video Converter and amplifier, connected to the feeding cable with collective TV antenna (EN, N 2120139, CL G 08 In 13/196, published. 1998).

A disadvantage of the known technical solution is that it only indicates the possibility of application of coaxial wiring collective antenna for transmission of television information from several monstrously modulators television signal, they are not used for transmission of television signals security systems on coaxial wiring collective antennas for interference to TV signals.

The present invention is the creation of a television system, security and surveillance, providing the use of coaxial wiring collective antenna for transmission of a television signal to the television sets of observation points without creating interference to the signals of television stations broadcast.

This problem is solved in a television system, security and surveillance, including installed at the observation points TVs and set, at least one protected object unit of the video containing a video camera, microphone, video Converter and amplifier connected to the feeding cable due to the fact that it entered the cable distributors, the matching node of a television signal, installed between the collective television antenna and the first cable distributor, power supply cable, mounted on the end of the power cable, the power CCTV entered modulator connected to the video camera and the microphone, the control filter, connect the output of the modulator to the input of the transducer signal, controlled filter, the output of which is connected to the amplifier, a local oscillator connected to the inputs preobraziti-independent attenuator, amplitude equalizer and block mixing signal, an input connected to the cable collective antenna, and the output from the first cable distributor, frequency-independent attenuator connected to the power supply cable and amplitude equalizer, the output of which is connected to the input of the mixing unit of a television signal.

Additionally, the surveillance unit may contain a power source and the matching node television signal to the power supply.

The drawing shows a functional diagram of a television system, security and surveillance.

Television security system and surveillance contains installed on one or more protected objects, for example on the door of each residential building entrance, block 1 video containing a video camera 2, a microphone 3, connected to the modulator 4, the Converter 5 of the video signal, the local oscillator 6, the control filter 7 connecting the modulator 4 and the inverter 5 of the video signal is controlled filter 8, the power source 9, the sensor 10 with the casting device, the heater 11 and the amplifier 12 connected to the feeding cable 13.

The local oscillator 6 is connected to the inputs of the Converter 5 video and uproven amplifier 14 power cable with node 15 approval of a television signal, established between collective television antenna 16 and the first cable distributor 17. Matching node television signal consists of connected to the amplifier 14 power cable frequency-independent attenuator 18, the output of which is connected to the input of the amplitude equalizer 19, and the output of the latter is connected to the mixing block 20 of a television signal. The input unit 20 is connected to the cable 21 collective antenna 16, the output amplitude of the equalizer 19 and the block 22 of the power supply, and the output unit 20 is connected to the first cable distributor 17, the input signal on the TV 23.

As the amplitude of the equalizer 19 is used widely known chain of automatic control, information on which is available, for example, A. A. Bokonbaev, Reference book of ham-designer Ed. by N. And.Chistyakov, Ed. "Radio and communications", M., 1990, pp. 20, 32 and 69.

The use of television systems security and surveillance on the example of a house.

On the front door, at least one entrance, installed surveillance unit 1. The signals from the video camera 2 and the microphone 3 are received in the modulator 4, which transports the low frequency (LF) spectra taken of the body side component of the AM signal.

Setting up the system on the selected television channel is carried out by the local oscillator 6 and the Converter 5, with controlled filter 8 with a high slope, associated with the local oscillator 6 is the final filtering metre waves of a television signal, which prevents interference with TV stations on cable channel coaxial wiring collective antenna (CRC).

The sensor 10 and the heater 11 ensure the functioning of the unit 1 surveillance at low temperatures. The amplifiers 12 and 14 coordinate television mitrophanovyi signal system in KRKA, compensate for signal loss during transmission over long distances (up to 500 m).

After the amplifier 14 of the inlet cable television signal is supplied to a frequency-independent attenuator 18 which adjusts the TV RF signal from the video camera 2 in the cable 21 collective TV antenna 16. Then the amplitude equalizer 19 provides normalization, alignment, maintaining the amplitude - frequency characteristics of a television RF signal and the additional noise filtering, and the block 20 mixing television signal will specflow galvanic isolation. Block 22 power filters and stabilizes the supply voltage of the elements 18, 19 and 20 of the Central bus coaxial cable lead TV RF signal from the video camera 2. From block 20, the signal from the video camera 2 and the microphone 3 is supplied to the TV 23.

Thus, the system allows without any alterations and interference to television reception to use any household TV. Each resident, the TV which is connected to a floor distributor collective antenna can configure one of the TV channels on the signal of the system described above and, if desired, can see and hear everything that is being done in view of one or more blocks 1 observations.

1. TV system security and surveillance, containing installed on the observation points TVs and set, at least one protected object unit of the video, including video camera, microphone, video Converter and amplifier connected to the supply cable, characterized in that it introduced cable distributors, the matching node of a television signal, installed between the collective television antenna and the first cable raspredelitel entered modulator, connected to the video camera and microphone, managing filter connecting the output of the modulator to the input of the transducer signal, controlled filter, the output of which is connected to the amplifier, a local oscillator connected to the input of the inverter signal and controlled filter, and matching node television signal contains a frequency-independent attenuator amplitude equalizer and block mixing signal, an input connected to the cable collective antenna, and the output from the first cable distributor, and frequency-independent attenuator connected to the power supply cable and amplitude equalizer, the output of which is connected to the input of the mixing unit of a television signal.

2. Television security system and surveillance under item 1, characterized in that the surveillance unit contains the power supply.

3. Television security system and surveillance under item 1, characterized in that the matching node television signal contains the power supply.

 

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