RU2146079C1 - Device for transmission and reception of information by user - Google Patents

Abstract

FIELD: communication equipment. SUBSTANCE: device has user set, which include emergency call button, autonomous power supply, modulator, transmitter, telephone, microphone, amplification unit, keypad, signal generator, receiver, optical system and switch. Distributing relay of system includes duplex converter of optical signals, modulator, demodulator of emergency call signal, demodulator of telephone signals, emergency call network interface unit, and telephone network interface unit. EFFECT: elimination of public pay telephones, increased efficiency of delivery information about crime possibility or effective crime to police, increased functional capabilities, decreased cost. 2 cl, 2 dwg

Description

 The invention relates to general purpose alarm systems, in particular to systems for transmitting and receiving alarm information by a subscriber.

 A device for transmitting information by a subscriber for quickly identifying dangerous places on highways and simultaneously calling emergency services, which contains a call and signaling device, a cable network for power and control, as well as indicating and control devices (DE, patent N 4116786, G 08 B 25 / 00, 1992).

 However, this device has small functionality and does not allow simultaneous emergency call to transmit situational information and receive confirmation of the received message.

 A known system for transmitting and receiving information by a subscriber, comprising a subscriber device including an emergency call button connected to an autonomous power source, a modulator and a transmitter, the modulator output being connected to the transmitter input (GB, patent N 2154395, H 04 B 7/26, 1985) .

 However, this device also has small functionality and does not allow simultaneous emergency call to transmit situational information and receive confirmation of a received message.

 The objective of the present invention is to provide a system for transmitting and receiving information by a subscriber, which will allow the subscriber to transmit and receive any informational message through the telephone network, and in case of an emergency call, simultaneously transmit situational information and receive confirmation of the received message and other information.

The invention is illustrated by an example of its implementation and drawings, in which:
FIG. 1 depicts a functional structural diagram of a system for transmitting and receiving information by a subscriber;
FIG. 2 is a functional structural diagram of a system of its signal shaper.

 The system for transmitting and receiving information by the subscriber (Fig. 1) comprises a subscriber device 1, including an emergency call button 2, an autonomous power supply 3, a modulator 4, a transmitter 5, a telephone 15, a microphone 16, an amplification unit 17, a dialer 18, a signal shaper 19, a receiver 20, an optical system 21 and a switch 22, and a repeater 6 including a bi-directional optical signal converter 7, an optical signal receiver 8, an optical signal transmitter 9, a modulator 10, an emergency call signal demodulator 11, a telephone demodulator 12 signals, an emergency call network interface unit 13 and a telephone network interface unit 14.

 The signal generator 19 (Fig. 2) contains an analog-to-digital converter (ADC) 23, a parallel to serial code converter 24, an encoder 25 and a three-input logic element OR 26.

 In the subscriber device 1 of the system for transmitting and receiving information by the subscriber (Fig. 1), the output of the emergency call button 2 is connected to the first input of the autonomous power supply 3 and to the first input of the signal shaper 19, the output of the dialer 18 is connected to the second input of the signal shaper 19, the output of which is connected with the input of the modulator 4, the output of which is connected to the input of the transmitter 5. The output of the optical system 21 is connected to the input of the receiver 20, the output of which through the amplification unit 17 is connected to the input of the telephone 15. To the second input of the autonomous source 3 nick power switch 22 is connected.

 In the repeater 6 of the system for transmitting and receiving information by the subscriber (Fig. 1), the input and output of the bidirectional signal converter 7 are connected respectively to the output of the transmitter 9 and the input of the receiver 8, the output of which is connected to the inputs of the telephone signal demodulator 12 and the emergency call signal demodulator 11, the output of which connected to the input of the emergency call network interface unit 13, the output of the telephone signal demodulator 12 is connected to the input of the telephone network interface unit 14, the output of which is connected to the input of the modulator 10, the output of which The horn is connected to the input of the transmitter 9.

 The input of the optical system 21 and the output of the transmitter 5 of the subscriber unit 1 via a communication channel are respectively connected to the output and input of the bi-directional converter 7 of the relay 6 signals, the inputs and outputs of the emergency call network interface unit 13 are the inputs and outputs of the dispatch network, the inputs and outputs of the telephone interface unit 14 Networks are the inputs and outputs of the telephone network.

 In the driver 19 of the signals (Fig. 2), the ADC output 23 is connected to the input of the parallel code to 24 serial converter, the output of which is connected to the first input of the three-input logic element OR 26, the second input of which is connected to the output of the encoder 25. The ADC output 23, the encoder input 25 and the third input of the three-input logic element OR 26 is connected respectively to the output of the amplification unit 17, with the output of the emergency call button 2 and with the output of the dialer 18.

 A system for transmitting and receiving information by a subscriber operates as follows.

 The signal to be transmitted (a sequence of pulses from the dialer 18, a signal from the microphone 16 after amplification in the amplification unit 17, or a code sequence of emergency call pulses that appears when the emergency call button 2 is pressed), after generating the signal shaper 19, enters the modulator 4, which provides electrical current and voltage characteristics, after which the signal enters the transmitter 5, made on a semiconductor laser or light emitting diode.

The maximum values of voltage and current at the output of modulator 4 do not exceed, respectively, units B and tens of mA. A semiconductor laser (PL) or a light emitting diode (LED) has an output power of not more than tens of mW in the near infrared (IR) region of the spectrum (wavelength λ = 0.8-0.9 μm). In the transmitter 5, the output radiation is formed by a microlens into a beam with a divergence of 40-60 ^o , which provides the possibility of communication with a very rough orientation of the subscriber device 1 in space.

 The signal coming from the repeater 6 with a wavelength slightly different from the wavelength of the transmitter 5 of the subscriber unit 1 (to ensure isolation of the transmission and reception lines) passes through an optical filter of the optical system 21, which has a maximum transmittance on the reception wave and serves not only to improve the isolation of the receiver from the signals of its own transmitter, but also to reduce the background from sunlight and artificial lighting, and enters the receiver 20, where it is collected using a lens on the sensitive area of the photodetector, which d may be formed on a semiconductor photodiode. The signal, after amplification in the amplification block 17, enters the telephone 15.

 As the calculation shows, when using standard elements (emitter, photodiode and optical elements), the range of the system (the distance from the subscriber unit to the repeater) in telephone mode can reach 10 m, and in an emergency call, when a short series of pulses is emitted (code message) and the emitter mode can be forced, and the information throughput of the corresponding channel in the repeater 6 is low, the duration of action can reach 100 m.

 A stand-alone power supply 3 can be standard batteries, the energy consumption of which at the above transmitter power values 5 will provide the total duration of active operation of the subscriber device 1 until the battery is replaced, on the order of tens of hours, which is equivalent to several hundreds of telephone calls of usual duration.

 Structurally, the subscriber device 1 can be made on the basis of a compact handset with a push-button dialer, supplemented by appropriate electronic and optical units. The microcircuit design of the electronic units and the small size of the semiconductor emitter, photodiode and optical devices make it possible to make the design compact (similar to a pocket microcalculator) and adapted to be carried in a pocket or handbag.

 The repeater 6, installed in a convenient place for access (on a street lighting pole or house wall), at an altitude of 3-4 m above the ground, should be enclosed in a steam jacket and equipped with a small hole with a glass or plastic window for transmitting optical signals.

 The optical devices of the bi-directional signal converter 7, receiver 8, transmitter 9 and modulator 10 included in the repeater 6 can be similar to the corresponding blocks of the subscriber device 1 with the difference that the photodetector and the filter of the relay 6 should be designed for the wavelength of the transmitter 5 of the subscriber device 1, and the transmitter 9 of the relay 6 on the wavelength of the receiver 2 of the subscriber device 1.

 The signals from the transmitter 5 of the subscriber unit 1 are transmitted via a communication channel to a bi-directional signal converter 7 of the relay 6 and, after their conversion, are sent to the receiver 8. The emergency call signals are demodulated in the emergency call signal demodulator 11 and fed to the input of the emergency call network interface unit 13, and telephone the signals are demodulated in the telephone network demodulator 12 and fed to the input of the telephone network interface unit 14, from the output of which the telephone signals of the second subscriber arrive through the modulo 10 to the transmitter 9. After the conversion of signals in a bidirectional converter 7 to the communication channel received telephone signals in the optical system of subscriber unit 21 1.

 An electronic filter must be included in the circuit of the demodulator 11 of the emergency call signal, consistent with the emergency call code sequence and providing for this sequence the maximum signal to noise ratio.

 The emergency call network interface unit 13 is an electronic device that couples the output signal of the emergency call signal demodulator 11 to the regional alert network of the corresponding services (for example, the nearest police station, from where the call can be directly transferred to the patrol car via the existing radio communication system). An emergency call network, depending on specific conditions, can be wired or radio frequency, in the latter case, the emergency call network interface unit 13 should include a corresponding small-sized radio transmitter with an antenna.

 Block 14 of the telephone network interface must ensure the pairing of the demodulator 12 of the telephone signals and the modulator 10 with the telephone network. Moreover, in addition to voice transmission, the subscriber’s identification number is also transmitted to the telephone network, which is carried out automatically with each call. This information is used for the subsequent presentation of the invoice to pay for the call.

 In case of an emergency call, the subscriber’s identification number is part of the emergency call code package and is also used for the subsequent presentation of an invoice for payment for the work of the relevant services.

 Relay 6 power supply is provided from the telephone network.

 A system for transmitting and receiving information by a subscriber, developed on the basis of the invention, will make it possible to abandon the system of public pay phones (payphones), which are especially vulnerable to malicious devices, have poor voice quality with an insufficient number of installed payphones, and will also allow effective notification law enforcement agencies about the danger or crime committed. This, along with high technical characteristics and low cost of a system for transmitting and receiving information by a subscriber, determines the practical applicability of the invention.

Claims (2)

 1. A system for transmitting and receiving information by a subscriber, comprising a subscriber unit including a conversation unit containing a telephone and a microphone connected to an amplification unit, a dialer connected through a signal conditioner to a series-connected modulator and transmitter, as well as a series-connected autonomous power source and a switch, a receiver whose output is connected to a gain unit connected to the second input of the signal conditioning instrument, as well as a repeater including a bi-directional converter a signal connected through a series-connected receiver and demodulator to a telephone network interface unit, which is connected through a series-connected modulator and transmitter to a bi-directional signal converter, the inputs and outputs of the telephone network interface unit being inputs / outputs of the telephone network, characterized in that in the subscriber unit the optical system and the emergency call button are introduced, and the emergency call signal demodulator and the interfer unit are connected in series to the repeater ISA emergency call network, while the receivers, transmitters and a bi-directional signal converter are made in the form of an optical signal receiver, an optical signal transmitter and a bi-directional optical signal converter, the emergency call button is connected to the third input of the signal conditioner and to the output of the autonomous power source, the optical output the system is connected to the input of the receiver, and in the repeater the output of the receiver is connected to the input of the demodulator of the emergency call signal, the input of the optical system s and the output of the transmitter of the subscriber unit via a communication channel are connected to the input and output of the bidirectional signal converter, the inputs and outputs of the emergency call network interface unit are the inputs and outputs of the dispatch network.  2. The system for transmitting and receiving by the subscriber information according to claim 1, characterized in that the signal conditioner comprises an analog-to-digital converter, a parallel-to-serial converter, an encoder and a three-input logic element OR, the output of the analog-to-digital converter being connected to the input of the parallel code converter in serial, the output of which is connected to the first input of the three-input logic element OR, the second input of which is connected to the output of the encoder, while the input of analog-to-digital convert Pure, the encoder input and the third input of the three-input logic element OR are connected respectively with the output of the amplification unit, with the output of the emergency call button and with the output of the dialer.

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