UA66327A - System for simplex communication with an object - Google Patents

Abstract

The proposed system for simplex communication with an object contains a communication line, a transmitter, and a modulator that are located on the transmitting side of the communication line, a receiver, decoder, and a unit for generating message indication signal that are located on the receiving side of the communication line, and a power-supply unit. As the communication line, a power line is used. The transmitter contains a reference frequency signal generator, a reference pulse forming circuit, and a coder. The receiver contains a demodulator. The decoder contains a low-frequency signal amplifier, and a reference signal former.

Description

The device belongs to communication devices and is intended for use in notification and signaling systems.

The known device is a simplex communication device with a security object according to patent NO Me1263103 IPC p20881/08 dated 05/20/2000. "Device for security and fire alarm".

The known device includes sensors connected by communication channels, connected to the elements of the object, generators of sensor codes, an address block, a memory block, switching blocks, indications, generators of message signals. At the same time, communication channels are special communication lines spread throughout the protection zone, which form a rigid connection scheme.

The following disadvantages are characteristic of such a technical solution of simplex communication with the object. Due to the rigid connection scheme, the area of operation is not able to quickly react to changes on objects, for example, to a change in the location of the object. Any changes in the location of the object lead to the dismantling of the old and installation of the new connection scheme.

The organization of a special rather complex scheme of connections on large areas is associated with large capital costs and requires additional significant costs for operation. A complex connection scheme located on large areas is usually a factor that reduces the reliability of the entire device.

The known simplex communication device with the object according to the patent KO Me2058592, IPC 20881/08 dated 11/20/96 "Remote signaling system" (prototype).

The known device includes a switching unit, a transmitter and a modulator, as well as power supplies as part of the transmitting side. On the receiving side, the system includes a receiving antenna, a receiving unit in the form of a radio receiving unit, a decoding unit and a message signal generator. The communication channel is a radio frequency channel. In a known technical solution, protection is provided against complete loss of the message when pulses disappear or extra pulses appear (as a result of interference) by transmitting each number with a bundle of equal pulses with a fixed frequency for this number. The packet consists of several hundred pulses, and on the receiving side, correlation reception of the signal is carried out.

The implementation of the known device does not require time-consuming and expensive electrical installation work to create a special communication channel. The configuration of the system with such communication devices with the object can be quickly rebuilt without additional costs.

However, due to the large "clogging" of the ether, the degree of reliability of such a connection is insufficient. | even the achieved degree of reliability is solved due to hardware redundancy, which ensures multiple repetition of the symbol during transmission and correlation reception. Hardware redundancy requires significant costs for equipment, operation, and therefore energy consumption.

The invention is based on the task of increasing the degree of reliability of message transmission by means of a simplex communication device with an object while simultaneously reducing the costs of creating such a device.

The set task is solved by the fact that the device has a simplex communication with the object, which includes a communication channel, a transmitter and a modulator on the transmitting side, and a receiving unit, a decoding unit, a message signal generator, and power supply units on the receiving side , according to the invention, power supply lines are used as a communication channel, the transmitter is made in the form of a carrier frequency generator, its output is through the coupling device connected to the communication channel, and the input is to the output of the modulator, which consists of an encoder, the output of which is the output modulator, and the generator of reference signals, connected to the output of reference signals of the coder, to the information input of which a source of sound signals is connected, the receiving unit is made in the form of a demodulator, connected by its input through a coupling device to the communication channel, and its output to the input of the decoding unit, which consists of a decoder, the input of which is the input of the decoding unit, a low-frequency amplifier and a reference signal generator, connected th to the input of reference signals of the decoder, the information output of which is connected to the input of the low-frequency amplifier, to the output of which the shaper of the message signal is connected, the power supply units on the transmitting and receiving sides include a source of supply voltages connected to the power supply line and, through the power control device, with functions determining the presence of voltage in the network, - to the battery.

The simplex communication device with the object can accommodate in the modulator and decoding unit additionally introduced, respectively, a bidirectional address formation unit connected to the address input and output of the encoder and an address reading unit connected to the address input and output of the decoder.

The use as a communication channel between the transmitting and receiving sides of power supply lines allows, on the one hand, to increase the reliability of message transmission, since the reliability of transmission by wire communication is higher than by radio frequency channel, on the other hand, it does not require the creation and installation of a special communication channel connection, since the extensive power supply system allows the use of power lines for any system configuration. The creation of such a communication channel does not require costs, and the reliability of transmission over a wire channel does not require hardware redundancy.

The transmitter, made in the form of a carrier frequency generator, ensures transmission of the carrier frequency signal into the communication channel through the communication device.

The modulator, made in the form of an encoder, provides encoding of sound into digital form and compression of the information signal. The generator of reference signals serves to ensure the operation of the encoder. The coded and compressed sound signal from the output of the modulator produces changes in the frequency of the signal generated by the generator depending on whether "1" or "0" is received at its input.

The coupling device provides coordination of the output signal of the transmitter with the power supply line and galvanic separation.

The demodulator provides selection and formation of the signal for the decoder.

The decoder, together with the generator of the reference voltage, restores the compressed information signal, which is amplified by a low-frequency amplifier, after which it is fed to the generator of the message signal.

The coupling device provides galvanic separation with the power supply line and coordination of the information signal coming from the communication channel.

The supply voltage source, connected to the power grid, and through the power control device - to the battery, ensures the operation of the device both in stationary and emergency modes. The power control device determines the presence of 2208 voltage in the power supply line. In cases where there is no voltage in the line, the supply voltage source is connected to the battery. This solution of the power supply unit ensures reliable operation of the device.

A variant of the solution of the simplex communication device with the object can be input into the encoder and decoder, respectively, the address generation block and the address reading block.

This implementation allows you to send a message to a specific object.

Thus, the set of essential features of the claimed invention allows you to solve the task - to increase the degree of reliability of message transmission, compared to the prototype, and at the same time to reduce the costs of creating such a device, since there is no need for hardware redundancy.

This is confirmed by an example of a specific implementation.

Fig. 1 shows the structural diagram of the simplex communication device with the object.

The simplex communication device includes communication channel 1 in the form of a section of the power supply line, on the transmitting side transmitter 2, in the form of a carrier frequency generator, with its output through the device C of the connection connected to the communication channel 1, and the input to the output of the modulator 4, which consists of an encoder 5 and a generator 6 of reference signals, its output connected to the input of the reference signals of the encoder 5, to the information input of which a source of sound signals is connected, on the receiving side, the receiving unit 8 is made in the form of a demodulator, connected by its input through the device 9 of coupling to communication channel 1, and the output to the output of the decoding unit 10, which consists of a detector 11, a low-frequency amplifier 12 and a reference signal generator 13, the output of which is connected to the input of the reference signals of the decoder 11, the information output of which is connected to the output of the low-frequency amplifier 12 , the output of which is connected to the shaper 14 of the message signal, the power supply units on the transmitting and receiving sides of the radiate the source 16 of the supply voltage, connected to the power supply line (communication channel 1) and, through the power control device 17, with the functions of determining the presence of voltage in the network, to the battery 18.

A variant of the implementation of the simplex communication device with the object is a solution in which the modulator 4 and the decoding unit 10, respectively, address generation unit 19 and address reading unit 20 are additionally introduced into the modulator 4 and decoding unit 10.

The device works like this. When connecting the power supply unit 15, the power control device 17 determines the presence of voltage in the network (communication channel 1) and, in the absence of it, connects the circuit to the battery 18, and in the case when there is voltage in the network, the supply voltage source 16 works. The message in the form of an audio frequency signal comes from the source of 7 audio signals to the input of the encoder 5, from the output of which the digitally encoded and compressed signal enters the input of the transmitter 2, from the output of which the carrier frequency signal, modulated by the encoded and compressed audio frequency signal, enters the device From the connection and further into channel 1 of communication. On the receiving side, the information signal through the coupling device 9 enters the reception unit 8, where it is demodulated, then the compressed data is restored on the decoder 11, amplified by the low-frequency amplifier 12, and the message signal generator 14 voices the message. If the address generation block 19 is connected to the encoder in the modulator 4, and the address reading block 20 is inserted in the decoding block 10, then the device can send a message to the address of the corresponding element of the object. This can be useful, for example, when an alarming situation occurs gradually, and there is time for a phased evacuation of people so that panic does not occur, or in other cases when an alarming message affects only one object.

The functions of the encoder, data compression and their addressing on the transmitting side and the functions of the decoding unit on the receiving side of the hardware can be combined in the form of controllers.

Thus, the technical solution of the simplex communication device with the claimed object makes it possible to reliably convey a message to all elements of objects, a group of objects or one object through the wires of the communication channel with a comparatively simple and inexpensive scheme about the extensive power supply network as communication channels. The device can be very useful in hotel alarm systems. Supermarkets and other objects distributed throughout the territory in alarming and emergency situations.

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Claims (2)

1. A simplex communication device with an object that contains a communication channel, on the transmitting side - a transmitter and a modulator, and on the receiving side - a receiving unit, a decoding unit 1 message signal generator, as well as power supplies, which is different due to the fact that the power supply lines are used as a communication channel, the transmitter is made in the form of a carrier frequency generator, the output of which is connected to the communication channel through the connection device, and the input - to the output of the modulator, which consists of an encoder, the output of which is the output modulator, and the generator of reference signals, connected by its output to the input of reference signals of the coder, to the information input of which a source of sound signals is connected, the receiving unit is made in the form of a demodulator, connected by its input through a connection device to the communication channel, and the output to of the input of the decoding unit, which consists of a decoder, the input of which is the input of the decoding unit, a low-frequency amplifier and a reference signal generator connected to the input of the reference of the signals of the decoder, the information output of which is connected to the input of the low-frequency amplifier, to the output of which the shaper of the message signal is connected, the power supply units on the transmitting and receiving sides include a source of supply voltages connected to the power supply line and, through a power monitoring device with the functions of determining the presence in the voltage network, to the battery. 2. A simplex communication device with an object according to claim 1, which is characterized by the fact that the modulator 1 decoding unit additionally includes a bidirectional address generation unit connected to the address inputs and outputs of the encoder, and an address reading unit connected with addressable input and output of the decoder.