Device for controlling the sequence of pulse signals

 

(57) Abstract:

The invention is used in automation and computing for control of pulse sequences. The inventive device includes a multi-line switch pulse counter, a decoder, a block comparison and the input bus of the device. 2 Il.

The invention relates to a pulse technique and can be used in automation and computing for control of pulse sequences.

A device for controlling the sequence of pulse signals containing the element And the pulse counter, multi-channel switch, the first input of which is connected to the input bus and a second control group of inputs connected to the outputs of the pulse counter, the inverter and the element OR output multi-channel switch connected to the meter inlet and through an inverter to the first input element And a second input connected to the output element OR the input of which is connected to the input of the tires, the output element And is connected to an output bus [1]

A disadvantage of the known device is that it is in the process of the control sequence of the pulse signals are not viewsettings device to control the sequence of pulse signals, contains a multi-line switchboard, the first and second elements, OR the element is NOT, the group elements And the counter element And the decoder, the input bus, the first and the second output bus.

Input bus devices are connected to information inputs of the multi-channel switch, the inputs of the first element OR the first input element group I. Management group inputs multi-channel switch connected to the outputs of the counter and the inputs of the decoder, the outputs of which are connected to second inputs of the elements of group I.

The outputs of the elements of the group And are connected to the inputs of the second element OR the output of which is connected to the second output bus device. The output multi-channel switch connected to the counter input and the input element, the output of which is connected to the first input element And.

The output of the first element OR is connected with the second input element And the output of which is connected to the first output bus of the device [2]

The disadvantage of this device is that it does not allow accurate control of the sequence of pulse signals generated on the basis of the distribution of pulses in the ring shift register. So, when adutlvideos pulses), the control device generates no signal "Error".

The aim of the invention is to improve the quality of the control sequence of the pulse signals.

The goal is achieved in that the device for controlling the sequence of pulse signals containing a multi-line switch pulse counter, decoder, entered the Comparer.

The invention consists in the fact that in the proposed device the control sequence of the pulse signals is carried out by comparing the two position codes received at the first and second group of inputs of the block.

The first position code corresponds to a combination of ones and zeros in the moment, on input the tire monitoring device in accordance with a sequence of pulse signals.

The second position code is formed by a collaboration of members of the monitoring device of multi-channel switch, pulse counter, decoder. With proper interleaving of the signals input on the tires two positional code will always be equal to each other and to an output bus signal "Error" is missing. In case of violation of the order of signals on the input bus, when several signals instead of the nach during the next controlled signal or the simultaneous absence of a signal on the input tyres occurs in each of the above cases, nesravnennye two position codes and an output bus, a signal is generated "Error".

The drawing shows the proposed device.

Device for controlling the sequence of pulse signals includes a switch 1, a counter 2 pulse, the decoder 3 and unit 4 comparison. The information inputs of the switch 1 is connected to the input tyres 5-1-5-N and the first group of inputs of block 4 comparison. The multi-switch 1 is connected to the input of counter 2 pulse, the outputs of which are connected with the second control group of inputs multi-channel switch 1 and the inputs of the decoder 3, the outputs of which are connected with the second group of inputs of block 4 comparison, the inverted output of which is connected to the output bus 6.

The block diagram of the proposed device (see Fig.1) is presented for the case chetyrehhodovogo sequence of pulse signals generated by the pulse distributor on a four-bit ring shift register.

The control device includes a channel switch, digit pulse counter, the decoder at the four outputs and four-digit unit of comparison. When the number of inputs of the sequence of pulse signals, respectively, increases the bit width of the counter pulses, respectively, Otradnoe first and second groups of inputs Comparer without sacrificing quality control.

The device operates as follows.

Before you begin counter 2 pulse set to the zero state by any known method (the reset circuit not shown). The outputs of counter 2 pulse, is connected to the second control group of inputs multi-channel switch 1, set the number of respondents of the input bus.

When installing the meter, 2 pulses in the zero state to the multi-switch 1 connects the first input bus 5-1. The signal received at the first input of multi-channel switch 1, is held at its output and input of counter 2 pulse. At the end of the input signal counter 2 pulse changes its state to the subsequent, and thereby to output multi-channel switch 1 connects to the next, i.e. the second input bus 5-2. When the correct sequence of pulse signals, this process of connecting the input tyres 5-1-5-4 on the multi-switch 1 is repeated.

Each of the incoming input bus 5-1-5-4 signals are also supplied to the first group of inputs of block 4 comparison. At the inputs of this group of inputs of block 4 comparison alternately formed codes 1000, 0100, 0010, 0001, 1000, 0100 and so on

The second is apaydin to its inputs from the output of the counter 2 counts.

When sequentially receiving the pulse signals on the input bus 5-1-5-4 device on the outputs of the decoder 3 are sequentially formed positional codes 1000, 0100, 0010, 0001, 1000, 0100 and so on

When the correct sequence of signals on the input tyres 5-1-5-4 device compares the code for the first group of inputs of block 4 comparison with position code from the outputs of the decoder 3, the inverse output of block 4 comparisons, and hence on output bus 6 signal "Error" is missing.

In the presence of a controlled input bus DC signal that can happen, for example, in the case of failure of any trigger (continuous units) circular shift register of the pulse distributor counter 2 pulse does not change its state, because it works from the decay of the input signal, and, therefore, not connected to the multichannel output of switch 1 the following input bus. Upon receipt of the signal on the next input bus is nesravnennye codes at the inputs of block 4 comparison. So, if you have a constant signal on the second input bus 5-2 with the arrival of the signal at the third input bus 5-3 codes in the first and second groups of inputs of block 4 compared the ASS="ptx2">

While no signals on the input tyres 5-1-5-4, that can happen, for example, with the loss of units in the ring shift register allocator pulses, the first group of inputs of block 4 comparison of present code is 0000. At this time, the second group of inputs of block 4 comparison there is any other code other than code 0000. So, for example, with the loss of units in the third category of ring shift register allocator pulse code of the second group of inputs of block 4 comparison will be equal to 0010. On an output bus 6, a signal is generated "Error".

In violation of the alternating signal on the input tyres 5-1-5-4, for example, after the arrival of the signal on the bus 5-1 receives the signal on the bus 5-3, the multi-switch 1 this signal does not pass, because the code for the second control group of inputs of the switch 1 connects to its output bus 5-2. In the absence of signals at the output of switch 1 status counter 2 pulse is not changed, i.e., remains the same as it was after the receipt of the signal on the first input bus 5-1. With the arrival of the signal on the bus 5-3 in the first and second groups of inputs of block 4 comparison codes are respectively equal to 0010 and 0100. The block 4 sravnenie is -4 false signals while another is carried out by comparing the codes on the input unit 4 comparison. On the second group of inputs of block 4 comparison consistently arrive generated by the decoder 3 positional codes 1000, 0100, 0010, 0001, 1000, 0100 and so on, as in the case of the proper rotation signal input on the tires 5-1-5-4 monitoring device. The first group of inputs of the block comparison will be present positional code consisting of two or more units. Thus, the appearance of a false signal on the first input bus 5-1 while the next signal on the third input bus 5-3 position code on the input unit 4 comparison will be equal to 1010 instead of the correct code 0010.

In this case, the block 4 comparison outputs to the output bus 6 signal "Error".

For admission to any of the input tyres 5-1-5-4 two pulses instead of one monitoring device generates an output bus 6 signaling sequence as follows. At the end of the input signal counter 2 pulse is set to the next state and connects to the output of switch 1 the following input bus. The decoder 3 generates positional code of the following input bus. The signal received for the second time on the same input bus, not output multichannel switch 1 and does not change the state of the counter 2 counts.

Thus, when the second input bus 5-2 two pulses instead of one positional codes in the first and second groups of inputs of block 4 comparison will be respectively equal to 0100 and 0010. On the output bus 6, a signal is generated "Error".

Chart of the operation of the device for chetyrehhodovogo sequence of pulse signals shown in Fig.2. Shows the sequence of pulse signals, the signals from the outputs of the pulse counter, a decoder and a signal of "Error".

The chart vertically shows the input bus 5-1, 5-2, 5-3, 5-4, the outputs of the pulse counter SCR, SCR, the outputs of the decoder DS, DS, DS, DS, the output bus error, and the horizontal region, characterizing the operation of the device control area and at the correct alternation of the input pulse signals; region b when the input bus 5-2 constant signal; a region in the simultaneous absence of a signal on the input buses; area g in violation of the order of the input signals; region d in the presence of false signals on the input bus 5-1; region W when receiving Evo control by changing the circuitry. When this signal "Error" is provided in case of violation of the order of signals on the input bus, when several signals instead of one, if the input tyres constant signal, and in the presence of false signals on the input tyres during the next controlled signal or the simultaneous absence of a signal input on the tires.

DEVICE FOR CONTROLLING the SEQUENCE of PULSE SIGNALS containing a multi-line switchboard, information the input of which is connected to the input buses, a pulse counter, a counting input connected to the output of the multi-channel switch, the decoder, the inputs of which are connected to the outputs of the pulse counter and the second control group of inputs multi-channel switch, wherein, with the aim of improving the quality of the control sequence of the pulse signals inputted unit of comparison, and the second group of inputs connected to the outputs of the decoder, the inverse output of the comparison is output bus.

 

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