SU1700572A1 - Device for registration of quarry vehicle - Google Patents

Abstract

The invention relates to a technique for controlling mining transport processes in open pit mines, relates to the registration of technological transport and improves information content by increasing the number of control zones at the checkpoint under conditions of intense interference and implementing tracking control of receiving antennas with analysis of the received signal for the presence of a frequency module. with given parameters. For this, at the control point, p-2 receiving antennas 8, frequency converters 15, 16, low-frequency filters 17, 18, amplitude detectors 19. 20, an adder 21, a reference frequency generator 22 and a control unit 23 are entered. The switch is designed as a multiplexer 9. The information transmitted to the control point is generated in the vehicle by setting number 7 and in series with the master oscillator 1, frequency modulator 2, amplifier 3 The switch 4 antennas provides alternate connection of transmitting antennas 5, 6 to the output amplifier 3. In accordance with the received signal at the control point of the given parameter, the information on the vehicle number comes from the decoding unit 13 to the storage register 14. 2 з.п, ф-л, 6 Il.

Description

The invention relates to a technique for controlling mountain transport processes in mining pits, concerns the registration of technological transport by automatically transmitting information about the number of the transport unit and can be used in the operational control systems for mining transport processes at the quarries.

The aim of the invention is to increase the information content of the device for registration of career transport,

Figure 1 shows the functional diagram of the device; Fig, 2 is a functional diagram of the unit number; FIG. 3 is a functional diagram of an information analysis block; 4 is a functional block diagram of the control unit; figure 5 and 6 - timing charts in the characteristic points of the device,

The device contains installed on the vehicle master oscillator 1, modulator 2 frequencies, amplifier 3, switch 4 antennas, transmitting antennas 5 and 6 and setting unit 7 numbers installed at the control point, receiving antennas 8.18.h, switchboard made in the form of a multiplexer 9 , amplifier 10, band-pass filter 11, frequency detector 12, decoding unit 13, register 14, frequency converters 15 and 16, filters 17 and

18 low frequency amplitude detectors

19 and 20, an adder 21, a reference frequency generator 22, and a control unit 23.

The frequency pick-up 7 contains a frequency divider 24, a counter of 25 pulses and a multiplexer 26.

The decoding unit 13 comprises a square wave former 27, a single-oscillator 28, a delay element 29, a shift register 30, a pulse generator 31, a pulse counter 32, and decoders 33 and 34.

The control unit 23 comprises a Schmitt trigger 35, an element NOT 36, controllable multivibrators 37 and 38, an element OR 39, and a pulse counter 40.

The device works as follows.

The transmitting part of the device, installed on the vehicle, is powered from the on-board network and operates continuously, emitting a transmitting antennae 5 and 6 with a manipulated sequence of frequency signals that carry information about the number N of the vehicle. The sensor 7 numbers sweeps parallel binary code N into a sequence of pulses whose width depends on the value of the current bit code. (figd), as follows. Information N in the form of a parallel code is fed to the information inputs of the multiplexer 26. At the output of the modulator 2 frequencies there is a signal with frequencies

equal to the manipulated frequencies fi, f2 (Fig. 56), arriving at the counting input of the frequency divider 24, which divides the input frequency into one of the two division factors n and P2 depending on the output state of the multiplexer 26, which, in turn, depends on the value (logical 0 or 1) of the bit transmitted at a given time. Frequency division is based on the principle

5 recalculation of the input pulses by a binary counter, therefore it is advisable to accept A2 t, i.e. the duration of one bit of the transmitted message varies twice depending on the value of this

0 bit, As a result, the output divider

24frequency signals are present, the shape of which is shown in Fig. 5a. At the beginning of each bit, the counter is triggered.

25 pulses, which changes its state by one, as a result of which at the output of multiplexer 26 a signal appears corresponding to the value of the bit transmitted at a given time. The nature of the signals at the output of the modulator 2

The frequency 0 is shown in FIG. 5b. Here, the duration of the parcel displays the value of the bit of information transmitted, and the frequency manipulation implements bitwise synchronization. Such a signal is minimally susceptible to interference in an inductive communication channel.

These signals are amplified by amplifier 3.

and through the 4 antenna switch, which

alternately connects one of the weekend

0 antennas 5 and 6. arrive at the transmitting

antennas. Antennas 5 and 6 are located on

different sides of the vehicle. AT

In this case, the receiving antennas of ustavlida; otsa on the side of the road or on the platform of the loading excavator.

In the case of rail transport, only one transmitting antenna, located under the bottom of the locomotive, can be used. In this case, the receiving antenna is installed in the roadway between the rails.

At the checkpoints, the receiving parts of the recording device are installed.

Receiving antennas are located in the control zones of this control point. In the initial state, the receiving antennas are under the influence of various electromagnetic interference and interference, for example, from the contact wire of an electrified railway. The appearance of a vehicle with a transmitter on board in the zone of operation of one of the receiving antennas 8.18.p causes the appearance of a signal of an induced emf at the output of this receiving antenna. The control unit 23 performs scanning of receptions.

antennas 8.18, p, alternately connected (with

multiplexer assistance 9) the output of each of them with the output of the multiplexer 9. The polling time of each receiving antenna 8.18.p

determined by the control unit 23 and can have two values: ti, when there is a control signal at the output of the adder 21, and t2, when this signal is absent, and

t1 t2.

The Schmitt trigger 35 is set to a certain level of the signal arriving at its input and eliminates the ripple of this signal (FIG. D). In the case when the output of the Schmitt trigger 35 signal is missing, the first multivibrator 37 does not work and the second multivibrator 38 does not work and, conversely, if the Schmitt trigger 35 output has a signal, then the first 37 does not work and the second 38 multivibrators work. By appropriately selecting the generation frequency of the multivibrators 37 and 38 (for example, so that the generation frequency of the first multivibrator 37 is 10 times greater than the generation frequency of the second multivibrator 38) the required switching time of the receiving antennas 8 can be achieved. Counter 40 counts the input pulses from one of the multivibrators 37 or 38, currently operating, while at the outputs of the counter 40, the information changes with a speed proportional to the frequency of the pulses arriving at the input.

The operation of the receiving part of the device is considered when the output of one of the receiving antennas 8.18, n (for example, antenna 8.1) has an induced emf signal from the transmitting antenna).

During polling of the receiving antenna 8.1, the signal from its output goes through multiplexer 9 to the input of amplifier 10 and to the inputs of the first 15 and second 16 frequency converters. The reference frequency generator 22 produces, at its outputs, square-wave pulses with a duty cycle of 2 and a frequency f equal to the center frequency of the frequency-controlled signal of the transmitter. The phases of the pulses at the outputs of the generator 22 are shifted by 90 °. The choice of the frequency f is made according to the formula

fi + f2

ABOUT)

where fi. f2 - respectively, the upper and lower frequency of the frequency-manipulated signal produced by the transmitter, Hz.

5 In relation to the input induced

the signal fBx phase of the generator 22 pulses

the reference frequency can be arbitrary.

The first 15 and second 16 converters + g

frequencies in general are

0 devices that perform the mathematical function of the form

fab "Ifex-fl, (2)

. where your - output frequency converters 5 and 16 frequency;

5 TBX instantaneous value of the frequency supplied to the information inputs of frequency converters 15 and 16;

f is the oscillator frequency fed to the reference inputs of the converter 15 and 16 hours.

Moreover, the amplitude of the output signal of the frequency converters 15 and 16 is proportional to the amplitude of the input signal. In the simplest case, in the form of a converter

5, an electronic switch can be used that connects its input and output with a positive polarity of the control (reference) signal and a disconnecting input with an output with a negative polarity of the equalizing (reference) signal.

The first 17 and second 18 low-pass filters filter the high-frequency components of the converted signal. The cut-off frequency of low-pass filters 17 and 18 is determined from formula (2). The slope of the amplitude-frequency characteristic of the low-frequency filters 17 and 18 is chosen from the condition of the necessary bandwidth rectitude. Thus, when a frequency-manipulated signal appears at the inputs of converters 15 and 16 (FIG. 56) with manipulation frequencies fi, fa, the output of filters 17 and 18 of low frequency contains harmonic signals with frequencies tz f 1 - f

And T4 f - T2,

where fa and f4 are the frequencies of the signals at the output of the filters 17 and 18 of the low frequency1

0 fi is the upper frequency of the input signal; f2 is the lower frequency of the input signal; fa is the frequency of the signal at the outputs of the low-pass filters 17 and 18 at the input frequency of the signal f2;

5f4 is the frequency of the signal at the outputs of low-frequency filters 7 and 18 at the input frequency of the signal fa;

f is the frequency of the signal generator 22 reference frequency.

If the output frequency of the generator 22 is selected by the formula (1), then fa f4 (c.

Consequently, with the availability of the inputs of the converters 15 and 16 of the frequency-manipulated signal with the manipulation frequencies fi and fa, the outputs of the low-frequency filters 17 and 18 present signals with a frequency fs equal to the modulus of the difference between the input and reference frequencies, and since pulses arriving at the reference inputs of converters 15 and 16 differ by 90 °, and the phases of the signals at the outputs of the low-frequency filters 17 and 18 also differ by 90 ° (assuming that the phase-frequency characteristics of the low-frequency filters 17 and 18 are identical), which is displayed on FIG. a. Further, these signals are detected by half-period rectifiers 19 and 20 (fig.bv, 6d) and summed in adder 21. The signal at the output of adder 21 is shown in fig.bd. The signal at the output of the adder 21 is present all the time while the modulated signal is induced in the receiving antenna under the influence of the transmitter. The frequency band of the input signal at which this control voltage may appear at the output of the adder 21 is determined by the frequency of the generator 22 and the double passband of the low-pass filters 17 and 18. By using quartz resonators as the stabilizing element in the master oscillator 1 and the oscillator 22, the reference frequency can achieve the necessary stability of the frequency bandwidth.

When a control signal is applied from the output of the adder 21 to the input of the control unit 23, the polling time interval of this receiving antenna 8.1 is increased to the value required for receiving the incoming information. The reading of information is carried out on a circuit 10-14. Upon completion of the readout, multiplexer 9 is connected to the next antenna 8.2 and the input signal is read in the same way. If there is a disturbance at the input of the antenna, and not a useful signal, then at the end of the analysis time multiplexer 9 will switch to antenna 8.3, and so on. Thus, a round-up monitoring of all control zones and reading of information from those zones where the controlled vehicles are located is carried out. A read condition is the presence of frequency-manipulated signals in a given frequency band.

The amplifier 10 has an AGC circuit, which provides a slight change in the signal level at the input of the band-pass filter 11 tuned to the center frequency.

f. The signal from the output of the band-pass filter 11 is fed to the input of the frequency detector 12, which produces a selection of frequency bursts fi and f2 fed to the input of the block

13 decoding, where the determination of the correctness of the format and the transformation of the sequence of the input information signals to the parallel code N as follows, the Former

27 converts the input analog signal to a rectangular, suitable for further digital processing. The single-shot 28 produces a short pulse at the end of each bit.

incoming information. On the front of this pulse, an entry is made in the shift value register 30 of the discharge value (logical 0 or 1), coming from the output of the decoder 33. Delay element 29 performs

delaying the pulse from the output of the single-vibrator 28 for a time sufficient for the process of recording the value of the discharge in the shift register 30, and resets the counter 32 to the initial state. Then begins

the process of determining the value of the next bit of information, which is recorded in the shift register 30 on the edge of the pulse occurring at the output of the one-shot 28. Thus, the input information signals are converted into a serial code N, containing service and information bits. The decoder 34 determines the correctness of the format and in the case of

at its inputs of all service bits, a pulse appears at the output of the decoder equal to the duration of the first bit in the message format. On the front of this pulse, the data bits from register 30 are copied to output register 14, where they are stored until the next information arrives. From the outputs of the output register 14, external users can remove information about the vehicle number.

Claims (4)

Claim 1, A device for registering a quarry transport, which, in a transport vehicle, contains a master oscillator, the output of which is connected to the information input of a frequency modulator, the output of which is connected to the input of an amplifier, the output of which is connected to the input of an antenna switch. The 5 outputs of which are connected to transmitting antennas, the number setter, the output of which is connected to the control input of the frequency modulator, the information inputs of the number setpoint are the information inputs of the device, the control point is the first and second receiving antennas, the switch, the output of which is connected to the input of the amplifier, the output of which is connected to the input of a bandpass filter, the output of which is connected to the input of the frequency detector, the output of which is connected to the input of the local decoder, the register, the outputs of which are informational outputs Devices, characterized in that, in order to increase the informativeness of the device, reception antennas, two frequency converters, two low-frequency filters, two amplitudes are introduced into the control point p-2 The detectors, the adder, the reference frequency generator and the control unit, the commutator are made as a multiplexer, the outputs of the receiving antennas are connected to the information inputs of the multiplexer, the output of which is connected to the information inputs of the frequency converters, the outputs of which are connected to the inputs of the corresponding low-frequency filters, the outputs of which are connected to the inputs of the corresponding amplitude detectors, the outputs of which are connected to the corresponding inputs of the adder, the output of which is connected to the input of the control unit, the output Which are connected to the address inputs of the multiplexer, the outputs of the reference frequency generator are connected to the control inputs of the frequency converters, the output and group of outputs of the decoding unit are connected respectively to the control and information inputs of the register, on the vehicle the output of the frequency modulator is connected to the control input of the number setter . 2. The device according to claim 1, characterized in that the decoding unit comprises a square wave former, a single vibrator, a delay element, a shift register, a pulse generator, a pulse counter and two decoders, and the output of the square wave former is connected to the single vibrator input, the output of which is connected to the control input of the shift register and through a delay element to the control input of the pulse counter, the output is connected to the input of the first decoder, the output of which is connected to the information input of the register shift outputs of which are connected to the data inputs of the second decoder and the outputs are the pulse generator output is connected to the counting input of pulse counter, the output of the second decoder is output block input of the rectangular signal is input block. 3. Pop-1 device, characterized in that the control unit contains a Schmidt trigger, a NOT element, two controlled multivibrators, an OR element and a pulse counter, whose outputs are block outputs, the Schmidt trigger output is connected via the NOT element to the first input controlled multivibrator and directly to the input of the second controlled multivibrator, the outputs of the controlled multivibrators are connected to the inputs of the OR element, the output of which is connected to the information input of the pulse counter, the Schmidt trigger input is input block. Fy L U 4 ... / ..- L g but 6 Fig 6