Wireless emergency call and information technology shaft signalling and communication

 

(57) Abstract:

Purpose: the invention relates to the mining industry and is intended to alert miners in underground workings about the accident, call the individual subscriber's communication to the phone conventional light signals, for the transmission of additional digital information technological character displayed on the display liquid crystal display, and to connect to the system telecontrol production facilities. The inventive device includes transmitting and receiving sets. Transmitting the set consists of a processing unit and alarm, transmitter and connected to the transmitting antenna grounding. Each receiving set contains the antenna connected to the selective amplifier, the output of which is connected to the parallel mixers frequency, which is loaded on the local oscillator. The outputs of the mixers through the low pass filters and then through the threshold elements are connected to two inputs of the phase detector, the output of which is connected to the input of the decoder. On the transmitting side of the original information, transferable code in the corresponding binary posledovatelnoy the earth's surface into the mine. Adopted in the mine signal is demodulated and processed by the decoder and fed to the output transducer. 1 Il.

The invention relates to the mining industry, and in particular to systems for underground wireless communications and telemetry, and is designed for prompt notification of miners in underground workings about the accident, causing the individual subscriber's communication to the telephone corresponding conventional light signals emitted by a lamp miner's lamp, to transmit additional digital information technological character displayed on the display liquid crystal display, for emitting sound signals alerts technological nature and to connect to the system telecontrol production facilities.

Known wireless alarm [1], containing mounted on the surface of the earth transmitting terminal, consisting of a narrowband transmitter of electromagnetic signals of audio frequency, the antenna system grounding, and is located in the mine workings of the receiving terminal, consisting of a receiving antenna, power amplification and signal processing, the output of the Converter and the power supply.

The closest in technical essence to the present invention is a device of mine operational and emergency wireless underground workings [2]. This device contains a mounted on the surface of the earth, the transmitting set, consisting of a shaping unit alarm containing a push-button set field code and the nature of the message, encoder, microphone, switch, amplitude compressor, the transmitter audio frequency transmitting antenna in the form of a grounded dipole with moderators and power supply, and located in underground openings receiving the sets containing each receiving antenna, connected to the power amplification and signal processing, which includes an electronic key, the decoder and amplifier audio frequency output transducer (loudspeaker) and the power supply.

However, the decision to transmit emergency alerts speech communication from the surface to the underground workings Ney significant differences in the degree of attenuation of different frequency components, especially with increasing depth workings.

The purpose of the invention is to enhance reliability of the transmission of operational information in the underground workings and expand the functionality of the device.

This objective is achieved in that the device is a wireless emergency call and information technology shaft signalling and communication contains mounted on the surface of the mine transmitting the set consisting of series-connected reference oscillator, frequency divider, amplifier and systems antennas with earthing switches, and remote control mode, the output of which is connected to the second input of the frequency divider, and the other output of the remote control is connected to the second input of the amplifier, and is located in the underground workings of the portable receiving set, which includes an antenna connected to the input of the selective amplifier, the output of which is connected to the outputs of the two parallel mixers frequency. The second input of the first mixer is connected to the output of the local oscillator directly, and the second input of the second mixer frequency is connected to the same local oscillator via a phase shifter. The outputs of both mixers frequency h is RA, the output of which is input to decoder commands. The first output of the decoder through the current interrupter connected to the lamp miner's lamp for switching the respective coded signals "accident" or "call". The second output is connected to the control bus of the LCD indicator. The third output can be connected to the source of the audible alarm. The fourth output of the decoder can be connected to the system telecontrol production facilities.

When searching by the patent and scientific literature is not found technical solutions, similar to the features that distinguish the proposed solution from the prototype Therefore the proposed solution has significant differences.

The drawing shows a functional diagram of the device.

Wireless emergency call and information technology shaft signalling and communication includes transmitting and receiving sets.

Transmitting the set consists of series-connected reference oscillator 1, a divider with a variable division ratio of 2, the amplifier 3, the antenna 4 and earthing switches 5 and bullets the reference oscillator 1 is connected to the input of the control unit 6 through the driver code sequence (CPU) 7. Moreover, the third output control unit 5 is connected to the second input of the shaper 7.

Foster sets (shown one set) contain the antenna 8, it is connected to a selective amplifier 9, to the input of which is connected to the first inputs connected in parallel between a frequency mixers 10 and 11. The second inputs of the mixers 10 and 11 connected to the local oscillator 12, and one is connected directly and the other via the phase shifter 13. Thus the outputs of the mixers 10 and 11 through the low pass filters 14 and 15 and then sequentially through the threshold elements 16 and 17 are connected to two inputs of the phase detector 18. The output of the phase detector is connected to the input of the decoder 19 teams. The first output of the decoder 19 through the circuit breaker 20 is connected to the individual lamp miner's lamp (not shown). The second output is connected to the control bus zhidkokristallicheskii indicator 21. The third output can be connected to the source of the audible alarm 22. The fourth output can be connected to the system telecontrol production facilities 23.

The basic principle of operation of the device for wireless transmission of information in mining is that on the transmission side of the source inform telecontrol) code in the corresponding binary sequence of binary code combination, which then modulate the carrier frequency of the signal emitted by the transmitter with the surface of the earth into the mine through a grounded antenna.

In the mine the signal passed by the receiver, demodulated and processed by the decoder, where it is divided code sequence necessary to enable emergency phones or audible alarm, or to display digital information technological character on the LCD display, or telecontrol signals production facilities.

The proposed device operates as follows.

When pressing one of the buttons of the remote control 6 (a keyboard 6 is not shown), the imaging unit 7 generates the binary code sequence in accordance with the position of the button on the remote control 6 of the signal from the reference oscillator 1. At the end of the set of patterns from the imaging unit 7, the signal at the input of the control unit 6 and further to the control input of the divider 2, while on the other its input signal from the reference oscillator 1. In the divider 2 depending on the level of binary sequences that are sent from the processor-driver 7 through the control panel 6, is formed often the B>). Next, the signal is amplified by the amplifier 3 and the antenna 4 through the grounding 5 radiates a mountain range.

Electromagnetic signals propagating in the mountain, are receiving device, in particular its antenna 8, is converted to electric and amplified broadband selective amplifier 9 and then served on the first inputs of the frequency mixers 10 and 11, the second inputs to which the signals from the local oscillator 12 directly to the mixer 10 and via the digital phase shifter 13 to the mixer 11. The outputs of the mixers 10 and 11 appear harmonic oscillations of the difference frequency, and these signals are shifted relative to each other on the 90o.

Both the received signal passes through the low pass filters 14 and 15 and serves on the threshold elements 16 and 17. Then through the phase detector 18, which is formed of a digital signal corresponding to the transmitted information signal is supplied to the decoder 19, which are formed corresponding alarms or call, then flows on individual lamp miner's lamp 20. With the same decoder 19, the information transmitted in digital form is supplied to liquid crystal display 21 or the source of knowledge in this system is subsonic and encodes them for transmission of signals through the thickness of rocks, allows to solve the problem of increasing the reliability of the information transmitted in underground tunnels with a simultaneous increase in technological communication capabilities.

Therefore, the present invention allows, in addition to timely alert miners of accidents and in addition individual call any employee to link to the phone to give him the necessary technological information in digital form on a liquid crystal display, to transmit a signal audible alarm if necessary or include any system telecontrol production facilities that, in addition to improve the safety of mining operations in underground mines, improving the technological capabilities of the industrial mine communication can improve the technological capabilities of conducting mining operations in underground workings.

Wireless emergency call and information technology shaft signalling and communication, containing mounted on the surface of the earth passing a set consisting of a processing unit and alarm, transmitter and connected to the transmitting antenna with zatemneni, connected to the signal processing unit, including selective amplifier, a decoder, and an output transducer, characterized in that the processing unit has two frequency mixers, two low pass filters, two threshold elements, a phase shifter, the local oscillator and the phase detector, and the antenna is connected to the input of the selective amplifier, the output of which is connected with United first inputs of two parallel connected frequency mixers, the second input of the first mixer frequency is directly connected to the output of the local oscillator and the second input of the second mixer frequency is connected to the output of the local oscillator via a phase shifter, each of the outputs of both mixers through the low pass filters, as well as through the threshold elements connected to the two inputs of the phase detector, the output of which is connected to the input of the decoder commands, which, in turn, connected to the output Converter.

 

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FIELD: mining industry.

SUBSTANCE: device has two asynchronous electric engines, connected via reducers to drive sprockets of continuous traction chain, provided with plane carriages with their possible displacement along the guide, and hydraulic cylinders for displacing guide on pit-face. To windings of stators of first and second electric engines connected respectively are outputs of first and second frequency converters, inputs of which are connected to power grid and control inputs of which are connected respectively to outputs of first and second frequency adjusters. To frequency adjusters also connected are inputs of load detectors, to outputs of which load balancing block is connected, outputs of which are connected to inputs of first frequency adjuster. To inputs of both frequency adjusters output of load adjuster is connected, inputs of which are connected to load-setting block and load sensor for second engine. To output of second frequency converter connected are input of control block, other input of which is connected to signal block of base plant, and stator winding of third asynchronous engine, which via mechanical link is connected to first and second hydraulic pumps, having constant working volumes. Output of first hydraulic pump is connected to force hydro-main and input of second preventing hydraulic valve and to first inputs of two-position hydraulic distributors with electromagnetic control, to electromagnets of which outputs of control block are connected. Second inputs of two-positional hydraulic distributors with electromagnetic control are connected to control chambers of hydro-controlled two-positional hydro-distributors, which are part of hydro-blocks. Outputs of hydro-controlled two-positional distributors are connected to opposite hollows of volumetric dosing device of each hydro-block, and their inputs are connected respectively to outputs of hydro-distributors for controlling hydro-cylinder for moving the guide on pit-face, inputs of each of which are connected to force and drain hydro-mains, and outputs are connected to piston and rod hollows of appropriate hydro-cylinder.

EFFECT: higher efficiency.

1 dwg

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