RU19928U1 - DUPLEX TELEMETRIC RADIO STATION WITH INTERFACE DEVICE - Google Patents

Description

 The technical model refers to the radio engineering devices for transmitting and receiving electromagnetic waves and can be used in the radio communication technique of radio telemetry.

Various methods are known from ypoBf technology - transmitting a program 1. Designed to transmit and receive digital telemetric information 2, mounted on moving objects to provide radio communications 3. Each of these devices provides only one specific task. The closest in circuit design is telemetric duplex radio station 4, which is selected as a prototype. This device provides multichannel communication in the VHF range and the transmission of digital telemetric information using external modems but does not solve the tasks that were posed to the authors.

The proposed duplex telemetric radio station with a pairing device provides 1 transmission of digital information via a radio channel when it is necessary to automatically control pe KT-iMaMH transceiver operation (receive-transmit), while the information on controlling the remadms is transmitted together with digital information on a two-wire line.

The technical result is achieved by the fact that a duplex telemetry radio station with a pairing device contains a series-connected antenna, an antenna filter connected to the first input of the receiver, two synthesizers, the first input of the first synthesizer is connected to the receiver, the second output of the first synthesizer is connected to the first input of the second synthesizer, the output of which is connected through a transmitter with an antenna filter input. The first output of the receiver is connected through the first amplifier and the first matching device with the output of a two-wire line. The second output of the receiver through the switching circuit is connected to the output of the two-wire line. Two input: wire line through series connection of the second matching device, low-pass filter, converter.

the microprocessor is connected to the second input of the receiver. The output of the second matching device through a series-connected filter of high frequencies of the second amplifier and the submodulator is connected to the second input of the second siezatorz. The control input of the microprocessor is connected to the device for setting the comparison frequencies.

The drawing shows a functional electrical diagram of a duplex telemetry radio station with a pairing device.

The radio station contains an antenna L antenna filter 2, receive; 3, first synthesizer 4, second synthesizer 5, transmitter 6, submodulator 7, first amplifier 8, first matching device 9, switching device 10, second matching device, low-pass filter 12, converter 13, microprocessor 14, high-pass filter 15, the second amplifier 16, the reference frequency setting device 17, the output of the two-wire line 18, the input of the two-wire line 19. The first synthesizer generates a local oscillator frequency for the receiver and a reference frequency for the second synthesizer. The second synthesizer generates the carrier frequency of the transmitter; the output signal of the transmitter is fed to the input of the antenna filter. Lo two-wire line receives the input information to the second matching device, the output of which is connected in series with a low-pass filter (LPF) and a high-pass filter (HPF). The output of the low-pass filter is connected via a converter to a microprocessor, the output of which is connected to the receiver. The output of the low-pass filter through the amplifier is connected to the submodulator, the output of the submodulator is connected to the input of the transmitter. The output of the receiver is connected in series with the switching circuit, the output of the switch is connected to a two-wire line.

The radio works as follows. A signal is supplied through the two-wire line to the input of the first matching device, which includes s four: 3C bi,. 2, GZ. F4) in the range of 10 hours IO c to 640 Hz; two data transmission frequencies 1350 Hz and 2100 Hz. One of the tonal frequencies (F1, F2 F3 or G4) can arrive simultaneously. From the output of the matching device, the signal is fed to the low-pass filter and low-pass filter, as a result of which the tonal control frequencies are present at the output of the low-pass filter, and only data signals are output from the high-pass filter. From the output of the low-pass filter, the signal enters the converter for conversion

sinusoidal signal into the meander The meander is fed to the microprocessor from external RAM ii ROM The microprocessor implements the discrete Fourier transform algorithm, which allows the input signal frequency to be distributed in 10 ms. A signal specifying the frequency of the comparison signal is supplied from the device for setting the comparison frequencies i-ia and 1 microprocessor. When the frequency of the input signal coincides with the frequency of the comparison signal, the microprocessor receives a signal of the 11th logical level. This signal is issued all the time while there is an input signal with a frequency corresponding to the frequency of the comparison signal. The signal from the microprocessor output is fed to the BNC board (low-frequency block) of the receiver and controls the operating modes of the radio station (reception transmission). From the output of the HPF through the amplifier, the data signal is fed to the input of the sub-cooler, in which it is corrected with a slope of the frequency response of 6 dB per octave. This signal is fed to a second synthesizer where modulation is carried out - real frequencies. From the output of the second synthesizer, the signal is fed to the transmitter, which provides an output power of at least 15 V - i W; From the output of the transmitter through the antenna filter, the signal nocivnae: to the antenna. In the reception mode, the signal received by the antenna is fed to the input of the receiver, which consists of a radio frequency amplifier, mixer, intermediate frequency amplifier, and a low-frequency block, not shown in the drawing. The low-frequency signal from the receiver enters through the first amplifier, and the first matching device enters the two-wire line. A signal containing information about the presence of a carrier at the input of the receiver is fed through a switching circuit to a two-wire / x-wire line.

A feature of a duplex telemetry radio station with a pairing device is the galvanic isolation of all its signal circuits of the external telemechanics system, which significantly increases the reliability of the entire system.

Used, pigment RF Patent №2019039 Н04В7.00, published Byul, №16 / 94

Claims (1)

A duplex telemetry radio station with an interface device containing an antenna connected in series, an antenna filter connected to the first input of the receiver, two synthesizers, the first input of the first synthesizer connected to the receiver, the second output of the first synthesizer connected to the first input of the second synthesizer, the output of which is connected through the transmitter to the input antenna filter, characterized in that the first output of the receiver is connected through the first amplifier and the first matching device with the output of the two-wire line, the second the output of the receiver through the switching circuit is connected to the output of the two-wire line, the input of the two-wire line through the second matching device, a low-pass filter, the converter, the microprocessor is connected to the second input of the receiver, the output of the second matching device through a series-connected high-pass filter, the second amplifier and the submodulator are connected with the second input of the second synthesizer, the control input of the microprocessor is connected to a device for setting the comparison frequencies.