SU512620A2 - Antiboxing device - Google Patents

Description

The invention relates to the field of railway technology, namely, electrical devices that control the electric drive by the generator-engine> system and is intended primarily to control the excitation of the traction generator of an autonomous locomotive when boxing wheels of an electric rolling stock.

Mainly auto No. 510038 describes a traction control device containing wheel pair speed sensors connected via switches and memory elements to AND and OR logic elements, with the reset generator turned on at the output of the AND element and the delay line at the output of the OR element, as well as a multivibrator and corrector in the circuit control of the excitation current of the traction generator, and equipped with an additional switch connected between the multivibrator and the corrector, the control inputs of which are connected to the output of the delay line and to the inputs of the control detecting switches working inputs which are also connected to the additional output switch.

The maximum thrust of a locomotive is determined by the number of driving wheelsets that have retained traction with the rail. When adjusting only for the maximum intensity of blocking of one of the wheelsets without taking into account the number of boxing wheelsets and the intensity of their blocking, prerequisites are created for _{tn the} further development of blocking of the locomotive.

The purpose of the invention is to eliminate its insensitivity to the number of boxing wheelsets.

This is achieved by the fact that the device is equipped with series-connected inverters and additional logical elements AND connected between the outputs of the storage elements and the inputs of the switches, the first input of one additional logic element being connected to the second input of another additional logic element.

The drawing shows a basic electrical block diagram of the proposed device for a locomotive with three driving axles. Locomotives with a large number of axles require a corresponding increase in elements.

The traction control device consists of three completely identical · ¹ counting circuits and a control circuit for the excitation current of the traction generator. Each counting circuit consists of a switch 1, a memory element 2, an additional logic element And 3 and an inverter 4. Switch 1 has two working inputs a and b, a switching input c, blocking the stroke r, a control input e and an output connected to the input of the storage Element 2. Are the frequency signals coming to the working inputs of the switches? _Tg from wheel speed sensors. Frequency signals £ ext. from the multivibrator 5 through the additional switch 6. The switching input prepares switch 1 for switching it on to the control input e. The control input.d turns on when the logical element OR 7 is turned on. If there is no signal at the control input e, switch 1 passes signals through the working input and outside depending on the presence of a signal at the switching input b. If there is a signal at the control input q and there is no signal at the switching input b, the switch 1 does not pass signals either at the working input a or at the working input b.

In the presence of signals at the control input d and at the switching input to the switch 1 passes signals at the working input b. The blocking input g of the switch 1 is turned on when the counter 2 is completely filled with its output signal. The signal at the input g completely blocks the switch 1 without missing signal or on the working entry and or on the working entry used regardless of the combinations of signals to the switch inlet and the control input d. Structurally, the switch 1 may be configured for any key _{to the} scheme providing its switching according to the program described above.

The memory element 2 serves to store information received at its input from the switch 1. After complete filling, the counter 2 gives a signal to the blocking input g of the switch 1, to the input of the inverter 4, to the inputs of the logic elements OR 7 and AND 8. The memory element 2 is made by standard counting scheme. Its capacity is determined on the basis of the required accuracy and speed.

An additional logic element And 3 and the inverter 4 comprise a switching circuit. An additional logical element And 3 serves to issue an output signal in the presence of signals at both its inputs. The execution of the AND element corresponds to the serial diagram of the conjunctor. The inverter 4 is designed to invert the output signal of the storage element 2 and is made according to the known scheme.

The control circuit consists of a multivibrator 5, an additional switch 6, logical elements OR 7 and AND 8 _; a reset generator 9, a delay line 10, and a control unit 11.

.Multivibrator 5 is designed for continuous generation of pulses of constant frequency.

An additional switch 6 is used to transmit signals from the multivibrator 5 to the working inputs of the switches 1 and to the control unit 11. An additional switch 6 is opened by a signal from the output of the delay line 10. The design of switch 6 is a key scheme of the usual type.

The logical element OR 7 is designed to issue an output signal when a signal is received at any input from the output of the memory element 2 of any counting circuit. The logical element OR 7 can be performed according to any standard schizyunktora scheme.

Logical element And 8 is designed to receive a signal at its output if there are signals at all its inputs from the outputs of the storage element 2 of the counting circuits. The logical element And 8 is made according to the standard conjunctor scheme.

The reset generator 9 is designed to return the memory elements 2 of the counting circuits to zero when a signal is output from the output of the logical element And 8. Structurally, the reset generator is made, for example, according to the power amplifier circuit, the output of which is connected to the installation inputs of the memory elements 2.

The delay line 10 is a standard element used to receive two signals at its output: one pulse output a and the second potential output b. The pulse signal at the output of a has a constant duration and appears immediately after the input to the input of the delay line 10 of the signal from the output of the logic element OR 7. After the end of the signal at the output of a, the signal appears at the output of the delay line 10. This signal is stored until the input from the output of the delay line receives a signal from the output of the logic element OR 7.

The control unit 11 is used to control the excitation current of the traction generator. The design of this unit is determined by the type of locomotive. An indispensable feature of the control unit 11 is the presence in its circuit of a storage element - counter.

We explain the operation of the traction control device using the example of the boxing mode of the second locomotive axis. When boxing any other wheelset, the operation of the traction control device remains the same.

In the initial state, the storage Elements 2 are reset to zero, the switches 1 are open at the inputs a, at the outputs of the counters 2, logic elements OR 7 and AND 8, generator 9 reset, outputs a and b of the delay line 10 and additional switch 6 are absent.

The operation cycle of the traction control device begins with the passage of signals 1¾ along the working inputs of the switches 1 to the memory elements 2. Since the boxing wheelset has a higher rotation speed compared to the non-boxing one, the frequency of the signals frj. Connected to it by the rotation speed sensor is higher than non-boxing. The counter 2 of the boxing wheelset will fill up before the rest of the counter is filled. The output signal of the counter 2 of the second counting circuit will block its switch 1 at the blocking input g and turn on the logic element OR 7. The output signal of the logic element OR 7 will close all switches 1 at the working inputs a and start the delay line 10. The output signal from the output of the delay line 10 will reset to zero the storage element of the control unit 11. At the end of the signal from the output of the delay line 10, a signal will appear at its output

b. This signal will open the switch key 6, which will begin to transmit signals from the multivibrator 5. The signals Gdrp from the output of the additional switch 6 are fed to the working inputs of the switches 1 and to the memory element of the control unit 11. For Gdop signals. only the working input b of the third counting circuit will be open, since only in this switch the additional logic element And 3 will give a switching signal (the signal of counter 2 of the second counting circuit will go to one input of the additional logic element And 3, and the inverted signal with output of its counting chain). The number of pulses recorded in the counter 2 of the third counting circuit and in the storage element of the control unit 11 will be equal to the difference between the total capacity of the counter 2 'I and the number of pulses recorded in this counter from the speed sensor for the counting cycle. After the counter 2 _{k is} completely filled, its output signal blocks its switch 1 at the blocking input d. The inverted signal of the counter 2 of the third counter circuit locks its additional logic element And 3 and opens the additional logic element And 3 of the first counter circuit, In the memory element 2 of the first counter circuit the number of pulses necessary for its full filling is recorded. After the counter 2 of the first counting circuit is completely filled, its output signal blocks its switch at the blocking input g, closes the additional logic element And 3 of its counting circuit and starts the logic element And 8. The output signal of the logic element And 8 includes a reset generator 9, which returns the counters 2 in the initial state. At the outputs of counters 2, logic gates OR 7 and AND 8, outputs a and b of line 10 of the delay and additional switch 6, the signals disappear. The next similar counting cycle begins. However, before the end of the next counting cycle, the storage element of the control unit contains information on the intensity of blocking of the wheel pairs, since the total number of pulses before filling each counter characterizes the total intensity of blocking of all wheel pairs.

Claims (2)

(54) ANTI-BLOCKING DEVICE The anti-skid device consists of three completely identical counting circuits and an excitation current control circuit of the traction generator. Each counting circuit consists of KONiMyTaTOpa 1 of storage element 2, additional logic element AND 3 and inverter 4. Switch 1 has two working inputs a and b switching input, blocking input g, control input d and output connected to the input of memory element 2. Frequency signals f are received from the speed sensors of the wheelsets to the working inputs of the switches. The working inputs b of the switches receive frequency signals from the multivibrator 5 through the additional switch 6. The switching input prepares the switch 1 to turn it on to the control input d. The control input d is turned on when the logical element OR 7 is turned on. The control input d switch 1 passes signals to the working input a, regardless of the presence of a signal at the switching input b. If there is a signal at the control input d and there is no signal at the switching input b, switch 1 does not pass the signals through either the working input a or the working input b. If there are signals at the control input g and at the switch input to switch 1, it passes signals through the working input b. The blocking input r of switch 1 is turned on when counter 2 is completely filled with its output by a signal. C / gon at input g completely blocks switch 1, does not pass signals either at work input a, or at work input b depending on the combinations of signals at the switching input and control input. Structurally, switch 1 can be made Any key scheme that ensures its switching according to the program described above. The storage element 2 serves to memorize information arriving at its input from switch 1. After full filling, counter 2 transmits a signal to the blocking input r of switch 1, to the input of inverter 4, to the inputs of logical elements OR 7 and AND 8. The storage element 2 is completed according to the standard counting scheme. Its capacity is determined based on the required values of accuracy and speed. An additional logical element 3 and an inverter 4 constitute a switching circuit. An additional logical element AND 3 serves to output the output signal in the presence of signals at its inputs. The execution of the element And corresponds to the serial scheme of the conjunctor. Inverter 4 is designed to invert the output signal of memory element 2 and is made according to a known scheme. The control circuit consists of the multivibrator 5, the additional switch 6, the OR 7 and AND 8 logic elements of the reset generator 9, the delay line 10 and the control unit 11. Multivibrator 5 is designed to continuously generate pulses of a constant frequency. The additional switch b serves for transmitting signals from the multivibrator 5 to the working inputs b of the switches 1 and to the control unit 11. The additional switch 6 is opened by a signal from the output b of the delay line 10. Constructive design of switch b is a conventional type key switch. The logical element OR 7 is designed to output the output signal when any input signal from the output of the storage element 2 of any counting circuit. The logical element OR 7 can be performed according to any standard circuit of the receiver. The logical element I 8 is designed to receive a signal at its output if all its inputs have signals from the outputs of the storage element 2 of the counting circuits. The logical element I 8 is made according to the standard circuit torus. The reset generator 9 is designed to return the storage elements of the 2 counting circuits to the zero state when a signal from the output of the AND 8 gate arrives at its input. Structurally, the reset generator is made, for example, according to the power amplifier circuit whose output is connected to the setup inputs of the storage elements 2. Line 10 delay represents a standard element serving to receive two signals at its output: one pulsed at output a and the second potential at output b. The pulse signal at the output of a has a constant duration and appears immediately after the arrival at the input of the line 10 of the delay of the signal from the output of the logic element OR 7. After the termination of the signal at the output of the a, a signal appears at the output b of the delay line 10. This signal is preserved until the input of the delay line receives a signal from the output of the logic element OR 7. Control unit 11 serves to regulate the excitation current of the traction generator. The design of this unit is determined by the type of locomotive. An essential feature of the control unit 11 is the presence in its circuit of a storage element - a counter. The work of the anti-skid device is based on the example of the blocking mode of the second axis of the locomotive. When blocking any other wheel pair, the work of the anti-slip device remains the same. In the initial state, the storage elements 2 are reset to zero, the switches 1 are open at inputs a, at the outputs of counters 2, logic elements OR 7 and AND 8, generator 9 reset, outputs a and b line 10 of the delay and the additional switch 6 signals are missing. The cycle of the anti-skid device begins with the passage of signals through the working inputs of the switches 1 in the storage elements 2. Since the booster wheel pair has a greater rotational speed compared to the non-boxing, the frequency of the signal irfi of the rotational speed sensor coupled to it is higher than that of the non-boxing one. The counter 2 of the boxing column pair is filled before the remaining counters are filled. The output signal of counter 2 of the second counting circuit will block its switch 1 by blocking input r and turn on the logic element OR 7. The output signal of the logic element OR 7 will close all switches 1 on the working inputs a and will start the delay line 10. The output signal from the output of the line 10 for the lead will reset the memory element of the control unit 11 to zero. At the end of the signal from the output of line 10, the signal at its output b. This signal will open the switch key 6, which will start to pass signals from the multivibrator 5. The output signals of the additional switch 6 arrive at the working inputs b of the switches 1 and into the storage element of the control unit 11. For signals Gdrr. only the working input b of the third counting circuit will be opened, since only the additional logic element 3 will send a switching signal to this cat (the input of the additional logic element 3) the counter 2 signal of the second counting circuit and the second input inverted signal from the output of its counting circuit). The number of pulses recorded in counter 2 of the third counting circuit and in the memory element of control unit 11 will be equal to the difference between I the total capacity of counter 2 and the number of pulses recorded in this counter from the speed sensor during the counting cycle. After the counter 2 is completely filled, its output signal blocks its switch 1 by blocking input g. The inverted signal of counter 3 of the third counting circuit locks its additional logic element AND 3 and opens the additional logic element AND 3 of the first counting circuit of Memory storing 2 of the first counting circuit the number of pulses required to fill it completely. After the counter 2 of the first counting circuit is completely filled, its output signal locks its switch over the blocking input g, locks the additional logic element AND3 of its counting circuit and starts the logic element AND 8. The output signal of the AND 8 logic element turns on the reset generator 9, which returns counters 2 are reset. At the outputs of the counters 2, the logical elements OR 7 and And 8, the outputs a and b of the delay line 10 and the additional switch b, the signals disappear. The next similar counting cycle begins. However, before the end of the next counting cycle, information is stored in the storage unit of the control unit on the intensity of the boxing of wheel sets, since the total number of pulses before filling each counter characterizes the total intensity of the blocking of all wheel sets. Claims of the Invention Anti-slip device according to auth.St. No. 510038, I distinguish that, in order to obtain an output signal proportional to the number of locomotion's boxing axes, it is equipped with series-connected inverters and additional I logic elements connected between the outputs of the storage elements and the inputs of the switches, and the first input of one additional the logic element is connected to the second input of another additional logic element. ffbfxod