RU23221U1 - TELEMETRIC COMMUNICATION RADIO STATION FOR VEHICLE - Google Patents

Description

TELEMETRIC COMMUNICATION RADIO STATION FOR VEHICLE

The utility model is based on technical data, speech signals, and can be used in telemechanics, telemetry systems, and speech signal transmission devices.

The prior art device for transmitting digital information 1, the disadvantage of which is the difficulty of solving the problem and the redundancy of interstage communications.

A known method and device for transmitting a message in a mobile communication system 2, the disadvantage of which is the presence of a repeater and complex antenna devices.

The closest in circuit design is a telemetric radio station 3, but its use on a moving object is impossible due to the presence of interference to radio reception and transmission during operation of the vehicle engine.

The technical result, the claimed utility model is aimed at, is to ensure the transmission and reception of a speech signal and telemetry information from a vehicle

To achieve the specified result, a telemetric communication radio station for a vehicle contains a series-connected antenna, antenna switch, radio frequency amplifier, mixer, intermediate frequency amplifier, low frequency unit. The submodulator is connected to a frequency synthesizer, one output of which is connected to the mixer, the second through a power amplifier with an antenna

switchboard. An interference filter has been introduced, one output of which is connected to a low-frequency unit, the second to a power amplifier, and the input to a vehicle’s power system. The submodulator has one input for a speech signal, the second - a day of telemetric information. A correction circuit for a speech signal and a correction circuit for telemetric information are introduced into it. The low-frequency unit has one output for a speech signal, the second for telemetry information. An amplifier stage for a speech signal and an amplifier stage for telemetric information are introduced into it.

The drawing shows a functional diagram of a telemetric communication radio station for a vehicle, where:

1- antenna

2-antenna switch,

3- radio frequency amplifier,

4- mixer

5- intermediate frequency amplifier,

6- low frequency unit,

7- submodulator

8- frequency synthesizer

9- power amplifier,

10- interference filter.

The radio station contains a series-connected antenna 1, antenna switch 2, radio frequency amplifier 3, mixer 4, intermediate frequency amplifier 5, low-frequency unit 6, one output of which is the output of the speech signal 12, the second is the output of telemetry information 13. The speech signal at the first input 14 and telemetry information at the second input 15 enters the submodulator 7, the output of which is connected to the frequency synthesizer 8. The frequency synthesizer generates a heterodyne frequency, which from the first

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the output goes to the mixer 4, and a high-frequency frequency-modulated signal, which from the second output goes to the amplifier of the power of 9. From the output of the power amplifier 9, the high-frequency frequency-modulated signal through the antenna switch 2 goes to the antenna I. The supply voltage from the vehicle 11 goes to the interference filter 10, one output of which is connected to a power amplifier 9, and the second to a low-frequency unit 6.

The radio works as follows:

in reception mode, the received antepn signal is transmitted through the antenna switch to the input of the radio frequency amplifier. In order to increase the signal level, a high-quality circuit is used in the radio-frequency amplifier to ensure suppression of the reception mirror channels. From the output of the radio frequency amplifier, the signal is fed to the first input of the mixer, the second input of which supplies the local oscillator frequency from the frequency synthesizer, as a result of which the frequency is converted.

The intermediate-frequency amplifier uses an 8th-order narrow-band filter, which makes it possible to obtain selectivity on the adjacent channel of 75 dB. The signal of the first intermediate frequency is amplified in the amplifier of the intermediate frequency and converted into a signal of the second intermediate frequency. Then it is amplified and detected in the low frequency unit.

From the first output of the low-frequency unit, the low-frequency signal is fed to the handset or external speaker for listening to the speech signal. From the second output of the low-frequency unit, telemetry information is transmitted to external telemetry systems. In transmission mode, the low-frequency signal from the microphone is fed to the first input of the submodulator, and telemetry information from telemetry systems is fed to the second input

submodulator. After correction in the submodulator, the signal is fed to the frequency synthesizer to modulate the carrier frequency. The submodulator and frequency synthesizer, forming the local oscillator frequency for the mixer and the carrier frequency for the power amplifier, carry out frequency modulation of the carrier frequency. From the output of the frequency synthesizer, the frequency-modulated signal is fed to a power amplifier, where it is amplified and transmitted through the antenna switch to the antenna and radiated.

Due to the fact that the radio station is installed on a vehicle, the power is supplied from the vehicle’s power system, which has low-frequency and high-frequency interference. This interference will lead to a failure in the transmission of telemetry information.

In order to eliminate these interference, as well as to protect the radio station from erroneously changing the pole of the supply voltage, an interference filter is applied. The interference filter has a set of high-frequency and low-frequency filters and a protection circuit against voltage pole reversal.

Due to the fact that the radio station transmits not only telemetry information, but also a speech signal, a correction circuit for the speech signal and a correction circuit for telemetry information are introduced in the submodulator to form the amplitude-frequency x channel sterics. Similarly, an amplifier stage for a speech signal and an amplifier stage for telemetric information are introduced in the low-frequency unit.

The proposed telemetric communication radio station for a vehicle provides a stable voice signal and transmission of telemetric information from a vehicle with high speed when switching from a reception mode to a transmission mode and vice versa.

Sources of information:

1. The USSR certificate of invention for invention No. 1815669, IPC 5 G 08 C 19/16.

2. RF application for the invention No. 98117651, IPC 7 H 04 Q 7/14.

3. The certificate of the Russian Federation for nozelny model No. 16957, IPC 7 G 01 S 7/00 (prototin).

Claims (1)

Telemetric communication radio station for a vehicle, containing a series-connected antenna, antenna switch, radio frequency amplifier, mixer, intermediate-frequency amplifier and low-frequency unit, a submodulator connected to a frequency synthesizer, one output of which is connected to a mixer, and the second through a power amplifier to an antenna switch , characterized in that an interference filter is introduced, one output of which is connected to a low-frequency unit, the second - with a power amplifier, the input - with a transport power system Of the means, the submodulator has one input for the speech signal, the second one for telemetry information, a correction circuit for the speech signal and a correction circuit for telemetry information are introduced into it, the low-frequency unit has one output for the speech signal, the second for telemetry information, into it an amplifier stage for a speech signal and an amplifier stage for telemetric information are introduced.