RU37290U1 - RADIO CONTROL UNIT FOR LIGHTING PLATFORM PLATFORMS - Google Patents

Description

RADIO CONTROL UNIT FOR LIGHTING PLATFORM PLATFORMS

The utility model relates to radio engineering, and more specifically to radio telemechanics devices, and is intended to control the lighting of landing platforms at railway stations.

A device for receiving an address call containing a switch, a signal converter, a comparison unit, an integrator, a decision unit, a generator, a frequency divider, a control register, a decoder, a bistable element and a pulse selector 1.

The disadvantage of this device is the need for continuous signal transmission for the operation of the decisive unit, which prevents the transmission of other signals and reduces noise immunity.

A device for receiving a signal in a radio control system is also known, comprising a series-connected demodulator, a bandpass filter, a rectifier, a DC amplifier, an integrator, a threshold element, an AND logic element, the first input of which is connected to the output of the threshold element, a photo relay, the output of which is connected to the second input logical element And, an asynchronous RS-trigger, the input S of which is connected to the output of the logical element And, a generator, whose input is connected to the output of an asynchronous RS-trigger, a counter, an input of th is connected to the generator output and the output connected to the input of the counter R asynchronous RStriggera, lighting control relay having an input connected to the output of the asynchronous RStriggera. 2.

The disadvantage of this device is the low noise immunity when receiving a signal from a nearby transmitter with a modulating tone signal frequency of 700 Hz,

  IPC: N 04 Q 7/00

which is three times less than the frequency of 2100 Hz, used to control lighting.

This technical solution is selected as a prototype.

The technical goal is to increase the noise immunity when receiving radio control signals.

The technical goal is achieved by the fact that in the known device containing a serially connected demodulator, a first bandpass filter, a first rectifier, a first DC amplifier, an integrator and a threshold element, as well as a logical element And, the first input of which is connected to the output of the threshold element, asynchronous RS- a trigger whose input S is connected to the output of the logic element AND, a generator whose input is connected to the output of the asynchronous RS-trshter, a counter whose input is connected to the output of the generator, and the output of the counter is connected nen with the input R of the asynchronous RS trigger, the lighting control relay, the input of which is connected to the output of the asynchronous RS-trigger, an additional second bandpass filter is introduced, the input of which is connected to the output of the demodulator, a second rectifier, the input of which is connected to the output of the second bandpass filter, the second DC amplifier the input of which is connected to the output of the second rectifier and an inverter, the input of which is connected to the output of the second DC amplifier, and the output to the second input of the logic element I.

A diagram of the proposed radio control device illuminated landing platforms is presented in FIG. 1.

The proposed device comprises a demodulator 1, a first bandpass filter 2, a first rectifier 3, a first DC amplifier 4, an integrator 5, a threshold element 6, a second bandpass filter 7, a second rectifier 8, a second DC amplifier 9,

inverter 10, logic element And 11, asynchronous RS-trigger 12 with inputs, generator 13, counter 14 and lighting control relay 15.

The principle of operation of the proposed device is as follows. To turn on the lighting, the radio control system transmits a signal that arrives from the receiver to demodulator 1. At the output of the demodulator, an audio frequency of 2100 Hz is tuned to which the first bandpass filter 2 is tuned. The first rectifier 3 converts the audio signal into direct current, which is amplified by the first DC amplifier 4. The integrator 5 and the threshold element 6 protect the proposed device from false alarms that can occur due to powerful interference with a short duration. If a closely located transmitter operating at the same carrier frequency does not emit an interfering signal with a modulating frequency of 700 Hz, then there is no signal at the output of the second band-pass filter tuned to a frequency of 700 Hz. The signal also will not be at the output of the second one. 11.11 and the second DC amplifier 9, therefore, the output of the inverter 10 will be a signal of a logical unit. If a nearby transmitter emits an interfering signal with a modulating frequency of 700 Hz, a signal will appear at the output of the second band-pass filter tuned to a frequency of 700 Hz. The signal will also appear at the output of the second rectifier 8 and the second DC amplifier 9, so the output of the inverter 10 will be a logic zero signal. The logical element And 11 is controlled by a signal from the output of the inverter. If there is no interfering signal, the logic element AND is unlocked, and the signal from the output of the threshold element passes to input S 10 of the asynchronous RS trigger 9. To switch the asynchronous RS trigger, a short signal at input S is enough. When the asynchronous RS trigger switches, the signal appears at its output , which allows the operation of the generator 12 and the counter 13 and includes a lighting control relay 14.

The generator and counter are designed to form the time interval during which the lighting is on. When the counter counts the pre-set number of pulses of the generator, the signal from the output of the counter will go to the input R of the asynchronous RS-trshter, which will switch and turn off the lighting control relay. In this case, the shutdown signal from the output of the asynchronous RS-trshter will switch the counter to the zero state (the counter will reset). If there is an interfering signal, in order to prevent false operation of the device, the signal from the inverter output blocks the logical element I. Due to the presence of the integrator 5, the blocking occurs faster than the control signal appears from the output of the threshold element 6, thereby increasing the noise immunity.

A comparative analysis of the claimed device with the prototype shows that the proposed solution is characterized by the presence of new blocks and new connections between the elements of the proposed device.

Comparison of the proposed device with other technical solutions shows that the newly introduced blocks are known. However, their introduction into the inventive device in these relationships with the main elements allows you to get new properties, which leads to a change in the algorithm of the device.

The proposed device can be used to control the lighting of landing platforms of electric trains. Energy saving is achieved by the fact that the lighting is turned on only for the time the electric train is near the landing platform. The train driver, when approaching the stopping platform, transmits a signal to turn on the device using a radio station mounted on the locomotive. Lighting turns on for a period of not more than 10 minutes, which is quite enough for passengers to board and disembark. Since a small number of trains pass at night (from 11 p.m. to 5 a.m.), electricity is sharply reduced. overhead costs

Applicant:

Vice Rector for Scientific

E.M. Tarasov

the outputs of the first and second to the third input of the first element are connected I.

SOURCES OF USED INFORMATION

1. RF patent No. 2097941. Azarov G.I., Novikov V.P. Device for receiving an address call. Bull. No. 33. 1997 year

2 .. RF patent for utility model No. 32950. Labunsky L.S. Radio control device for lighting landing platforms. Bull. Number 27. 2003 year

Applicant:

Vice-rector for scientific p;

E.M. Tarasov photo relay, and the output is connected to

Claims (3)

1. A radio control device for lighting landing platforms, containing a serially connected demodulator, a first bandpass filter, a first rectifier, a first DC amplifier, an integrator and a threshold element, as well as a logical element And, the first input of which is connected to the output of the threshold element, an asynchronous RS-trigger, the input S of which is connected to the output of the logic element AND, the generator, the input of which is connected to the output of the asynchronous RS-trigger, the counter, the input of which is connected to the output of the generator, and the output of the counter dinene with the R input of the RS asynchronous trigger, a lighting control relay, the input of which is connected to the output of the RS asynchronous trigger, characterized in that a second bandpass filter is added to it, the input of which is connected to the output of the demodulator, the second rectifier, the input of which is connected to the output a second band-pass filter, a second DC amplifier, the input of which is connected to the output of the second rectifier and an inverter, the input of which is connected to the output of the second DC amplifier, and the output to the second input of the logical ele menta I. 2. The device according to claim 1, characterized in that instead of the second bandpass filter, a low-pass filter is installed with a cutoff frequency of 1400 Hz. 3. The device according to claim 1, characterized in that it additionally includes two photorelay and a second logical element And, the inputs of which are connected to the outputs of the first and second photo relay, and the output is connected to the third input of the first element I.