SU1452499A3 - Device for transmitting and receiving information - Google Patents

Abstract

A data transmission and monitoring/controlling system comprising transmitters 5 and receivers, in which district or local receivers contactable by local networks receive, evaluate and/or transmit signals of code transmitters placed in an area defined by an antenna or loop, the code senders operating with random periodicity and transmitting in FM code of constant length having at most three conditions or states. A gate 2 is connected between an oscillator 1 and a frequency synthesiser 3 which controls a switch 4 which frequency modulates a transmitter 5. Modulation information signals are provided via code transmitters 6 and 7. Gate 2 is controlled by a random generator 10, an enable circuit 8 and an inhibit circuit 9. The gate 2 and switch 4 are described (Figure 2). The transmitter 5 and the receiver are described (Figures 3 and 4) respectively. <IMAGE>

Description

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The invention relates to data transmission systems or, respectively, to a control system for determining various locations and / or indications of the state of people or objects in a given area.

The device works like a stochastic wireless device with an inductive loop.

The aim of the invention is to increase the information content of the device and reduce energy consumption.

Fig, 1 shows a block diagram of the transmitting side of the device; FIG. 2 shows a functional diagram of the transmitting side and the scheme of execution of the key block and the driver of the information signal; in fig. 3 - transmitter diagram; Fig, 4 is a functional diagram of the receiving side of the device.

The device on the transmitting side (FIGS. 1 and 2) contains a controlled oscillator 1, a block of 2 keys, a synthesizer 3 frequencies, an information signal shaper 4, a transmitter 5, the first 6 and second 7 encoders, an element 8 of resolution, transmission solution, element 9 ban, 10 random number generator.

Block 2 of the keys contains the elements AND 1TS-11z, the element OR 12 ,, the inverters 13 and 132,

Shaper 4 information signal contains the element OR 12, the elements And 14, -14, inverters, 15 t and .; 15 /, counter 16 and signal sealing block 17.

The transmitter (Fig. 3) contains a capacitor 18, a resistor 19, a transistor 20 and an oscillating circuit 21,

The device on the receiving side (Fig. 4) contains a band-pass filter 21, a pre-filter 22, a signal mixer 23, a generator 24, a second band-pass filter 25, an amplifier 26, a demodulator 27, and a comparison unit 28,

Locating the moving object moving across the entire width of the slab.

The device is located at the point of passage of the vehicle or moving object.

A passing vehicle includes a transmission permission element 8 by means of electromagnetic or ultrasonic radiation, which triggers the transmission part of the device.

In order to quickly transfer priority information using a random number generator, you can change the duration of the periods of the generated message, t, e. work in stochastic transfer mode.

0 Signals from generators 1 and 10 are fed to the corresponding inputs of key block 2, which generates a signal to control synthesizer 3 frequencies. At the same time, the signal from generator 1 is fed to the input of counter 16 of imaging device 4 of the information signal.

10 random number generator sets the time intervals between

0 following each other by transmissions, it serves to achieve maximum transmission density and stochastically changes the duration of the periods of the transmitted signal. The input of the block 2 of the key, connected to the element 8 of the transmission permission, serves to recognize located along the route - certain points when the vehicle passes

0 at close range.

The signals are generated on the transmitter side of the device by transmitters located in a given zone, with different frequencies and in a stochastic mode on a frequency-modulated code with three frequency values. Synthesizer

3 frequencies produce one of three frequency signals: f, p corresponding to a logical f j, corresponding to

giving logical O and f for a task of different transmission periods. These signals are sent to one of the inputs of the imaging device 4 of the information signal, the encoder 6 forms a constant

g; the vehicle identification code, and the encoder 7 is a variable code that characterizes the direction of motion, In addition to these, these signals are sent to other groups.

4 informational signal which

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by appropriately compressing the signals, it forms a message and transmits to transmitter 5,

The device provides for the prohibition of the signal through the element 9 prohibition of transmission, blocking the operation of the key block.

The device can be used for. translational definitions

20

movements (straight lines) of safety devices used in the fences of a certain class.

In addition, the device serves to ensure reproducibility and absence. distortions of information in extreme conditions of operation. The design and principle of operation of the transmitting side of the device eliminates the possibility of the above-mentioned operational interference. In this case, encoder 6 is the electrical circuit of the counter.

In the device on the transmitting side, 15 there are no current chains with extremely low power consumption, which have small dimensions. This part of the device can operate with battery power and be in the form of non-flammable structures. The receiving side of the device recognizes frequency modulated codes containing identification information and the status of stationary transmitters 5 located in the zone defined by the antenna wire connected to the transmitter, preferably the transmitter is in close inductive communication with the antenna wire.

The receiving side of the device can be an antenna wire that goes into a slot made on the transmitting side, and close communication is provided by a specially designed secure transmitting antenna installed inside the device. In order to locate or, accordingly, bring people to known hazardous areas, the transmitting side is equipped with a transmitting antenna with radiation in several directions with the aim of transferring

thirty

digging of positions of uncertain operation.

The transmitting side of the device can be made in the form of individual equipment (for example, the form of a device on a portable belt) or removable accessories of machines. For individual use, the transmitter's electrical circuit can be switched and used as a single-channel radioteleon.

The receiving side of the device serves to decode, control, and rewrite the signals received from the transmitters sig25 and 2 and the clcnro to those that are not available until the gg then I

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transfer data (not shown), from where the data goes to the local display, to local control systems or a data transmission network of a higher class.

Formula

the invention

20

Yu

15 30

Claims (2)

1. A device for transmitting and receiving information, containing on the transmitting side a controlled oscillator, the output of which is connected to the first input of the key block, the first encoder and transmitter, on the receiving side - the first and second band filters, the preamplifier and the demodule. A torus, characterized in that, in order to increase the information content of the device and reduce energy consumption. The children entered the device on the transmitting side a transmission resolution element, a random number generator, 25 a frequency synthesizer, an information signal generator, and a second one. the encoder, the output of the controlled oscillator is connected to the first input of the information signal generator, to the second, third and fourth inputs of which the corresponding outputs of the frequency synthesizer are connected, to the fifth and sixth inputs - the outputs of the first and second encoders, the output of the information frequency generator 2 is connected to the input of the transmitter , the outputs of the random number generator and the resolution element (the transmissions are connected to the second and third inputs of the key block, respectively, the first output of which is connected to the input of the frequency synthesizer, The second is connected to the seventh input of the information signal generator, a signal mixer, a generator, a comparison unit and an amplifier are input at the receiving side, the output of the first band-pass filter is connected to the first input of the signal mixer through the preamplifier, the second input is connected to the generator output, the output is through A second band pass filter, an amplifier and a demodulator are connected in series to the input of the comparison unit, the output of which is the output of the device. I 2. A device according to claim I, characterized in that a transmission prohibition element is introduced into the device. 40 45 0 fourth the output of which is connected by the input of the key block. 3, The device according to claim 1, of which is that the key block contains AND, OR and inverters, the first inputs of the first and second AND elements are combined and the first input of the block, the second input of the first AND element and the first input of the first inverter is combined and is the second input of the block, the second inputs of the first inverter and the second element AND are combined and are the third input of the block, the input of the second inverter is the fourth input, the outputs of the first and second elements AND are connected with the OR element the first vhbdom of the third element And the second the input of which is connected to the output of the second inverter, the output being the first output of the block, the output of the first inverter being the second output of the block, 4, the apparatus according to claim 1, characterized in that the information signal shaper comprises a counter, a signal compression unit, AND, OR, and inverters, the outputs of which are connected to the first inputs of the first and second And elements, respectively, whose outputs and output 99 third 6 element AND connected to the inputs of the element OR, whose output is the output of the information generator, the signal, the first output of the counter is connected to the input of the first inverter, the first input of the third and the second input of the second element, And the output of the signal compression unit is connected to the second input of the third element AND and input the second inverter, the inputs of the first group of the signal compression unit are connected to the output of the counter group, the first input of the counter, the second input-the first and the third inputs respectively, the third and second elements And, the inputs of the second and third groups of inputs of the signal compression unit, the second in turn. the counters are, respectively, the first, second, third, fourth, fifth, sixth and seventh inputs of the information signal generator, 5, The device according to claim. D, characterized in that the transmitter of the transmitting side is inductively connected to the antenna wire,  6, a device according to claim 5, characterized in that the antenna 30, the wire of the transmitting side is free and is made of non-insulated wire. Fig.Z FIG.