SU1241247A1 - Information input device - Google Patents

Abstract

The invention relates to the field of automation, which can be used in numerical control systems for machine tools. The invention allows for improved device reliability. Introduction to the device of the element NOT, the element AND and new connections eliminates the effect of changing the parameters of the input signal on the operation of the device, which increases its reliability. 1 hp 3 il. (Ls

Description

The invention relates to computer technology and can be used to enter information from discrete sensors into control systems operating in real time 5 times.

The purpose of the invention is to increase the reliability of the device by eliminating the loss of input information.

Figure 1 shows the functional U electrical circuit of the proposed device; figure 2 is a diagram of a block of discrete sensors; Fig. 3 is a diagram of a pulse selector.

The device contains a synchronization block 1–15, a register control unit 2, a discrete sensor block 3, a register 4, a group of 5 EXCLUSIVE OR elements, a third OR element 6, a selector 7, a fourth 8 and a second 9 ele- ment 20. And, the second element OR 10, second trigger 11, inputs and outputs 12-15 of the device, information outputs 16 of the device of the first group, outputs of the block 17 of discrete sensors, block 18. 25 information output, the first information input 19 and information outputs' 20 of the device of the second group, the second: delay element 21, first element AND 22, first element OR 23, first 30 trigger 24, third element AND 25, first delay element 26, driver 27 , decoder 28, a group of 29 elements AND, and a group, 30 elements OR. * 35

The block of discrete sensors consists of contacts 31 of sensors and elements NOT 32.

The selector contains, a pulse generator 33, a first element AND 34, 40 a first element NOT 35, a counter 36, a second element AND 37 and a second element NOT 38..

The block of discrete sensors, in addition, includes the first 39 and second 40 groups of resistors.

Input 12 is supplied from the device. At the highest level, the pulse at the moment when it is necessary to read the information about the position of the sensors of unit 5® 3. At input 13, a pulse is sent from the device of the highest level at the moment of reading the information on the position of the sensors of unit 3. Trigger 11 and trigger 24 of synchronization unit 1 - 55 clock inputs are triggered by the front dips of pulses arriving at these inputs, and at the reset input they are set to the zero position when a pulse arrives at these inputs. Each element of the EXCLUSIVE OR of group 5 controls the coincidence or mismatch of the position of the discharge of register 4 and the contact of the corresponding sensor of unit 3 and, if their positions do not coincide, it produces a single signal (from the K 155 series of microcircuits, K 155LP5 can be used as this element). Register 4 is intended for fixing and storing information about the position of the contacts of the sensors of block 3. Thus, when the device for inputting information, register 4 can be in one of two modes: Information storage and Recording information in parallel form (recording the position of the contacts of sensors of block 3) . As register 4, microcircuits K 155IR1 or K155IR13 can be used. Block 1 synchronization is designed to synchronize the operation of the device for reading information from discrete sensors and devices of the highest level, i.e. to exclude the issuance of information during recording in the register of a new position · objects and recording the new position of objects in the register during the issuance of information. Block 2 control the register is designed to set the register 4 in the desired mode.

The pulse duration issued by the shaper 27 is set sufficient for the operation of the register 4.

When the contact of the sensor 31 is open, a corresponding signal is present at the corresponding output of block 3, and when it is closed it is a single signal. The values of the resistors 39 and 40 are selected based on the fact that at the input of the elements NOT 32 a signal is sufficient that is sufficient in level and current to clearly trigger these elements.

The pulse selector 7 is designed to suppress pulses arising from the bounce of the contacts of the sensors of unit 3, and interference pulses arising in the channels connecting the outputs of unit 3 with the information inputs of register 4. Selector. 7 suppresses all pulses whose duration is less than the selection threshold.

EXCLUDING ANOTHER OR group 5, 'of the OR element 6 and at the output 7 there are no signals. Triglock 1 is in Tesla _and Sig22

A device for reading information from discrete sensors works as follows.

In the initial state, register 4 is in the Information storage mode, while its position corresponds to the position of the contacts of the discrete sensors 31 of block 3, the trigger 11 is in the zero position at the outputs of the elements at the output of the selector ger 24 in the new state.

When a contact of a sensor of block 3 is closed or opened, the signal changes at the corresponding output of block 3 and at the second input of the corresponding EXCLUSIVE OR group 5 element, at the output of which a single signal appears, which passes through the OR 6 element to the input of the pulse lecturer 7. After some time, cash appears at the output of selector 7, which closes the And element and launches the delay element 21 of synchronization unit 1 and sets trigger 11 in a single leading edge. At input 15, a signal appears indicating that a new one has appeared information. After the delay time, the signal from the output of the delay element 21 enters through the open element And 25 to the first output of the synchronization unit 1 and then to the input of the register control unit 2. Signal c. the input of block 2 starts the delay element 26 and passes to the first and second outputs of block 2, the register 4 is switched to the mode of recording information in parallel code. After the delay time ⁴ , a 'signal appears at the output of the element 26, and the driver 27 gives an impulse, according to which in per. histr 4 records the position of the contacts of the sensors of block 3. Since now the position of the register 4 corresponds to the position of the contacts of the sensors of block 3, the signal at the output of the corresponding element EXCLUSIVE OR group 5 disappears, at the output of the element OR 6 and at the output of the selector 7, the element And 22 opens block 1 synchronization and the device is ready to receive a signal from a device of the highest level to issue information. Trigger 11 is in the food -

C25 + s ₂ + t _Q + t _{Cl <} +? > WHERE * C6 'is the response time in 25 condition and gives a signal about the appearance of new information. After a time, not less - the time of writing to the register 4 the new position of the contacts of the sensors of block 3, s | + 'With ^{+ +} t _C6 ^C C7' ^fc C4 responsible of the AND 25, register 4, exclusive OR group 5, OR 6 and selector 7 when attaching it to the zero state, ty - pulse duration outputted from generator 27 at input 12 podaetg a pulse, while trigger 24 is set to a single position, and trigger 11 is set to zero. At input 15, the Change signal disappears ^ for the device of the highest level 20. this is a signal that allows the reading of information). ' Further, the information output unit 18 provides information recorded in the register 4 to the higher-level device. At the end of the reading of information, an impulse is supplied to input 13, and in block 1, trigger 24 is set to the zero position. A device for reading information from discrete sensors returns to its original state.

If any sensor of block 3 is triggered before the end of the information output, then the corresponding element EXCLUSIVE OR of group 5, the element OR 6, selector 7 and trigger 11 are set to a single state similarly to that described, giving output 15 a signal about a new change in the state of sensors 3 However, the signal from the output of the selector 7 is not passed to the output of the synchronization block 1, since the trigger 24 is in a single state. After the end of the issuance of information, the trigger 24 is set to zero by a pulse from the output

13. Further, similarly to the described, the new state of the sensors of block 3 is recorded in register-4.

If the input pulse is 12 Start. input is supplied · during the action of the signal from the output of the selector 7, then in the synchronization unit 1, the trigger 24 remains in the zero position, since the element And 22 is closed, and the trigger 11 remains in the single position, signaling that the signal to start the output of information is not accepted.

In this case, the device of the highest level after time ΐ must repeatedly issue a pulse to input 12.

In the event that interference occurs in the line connecting the contacts of the sensors 3 to the EXCLUSIVE OR group 5 * elements, the device will not malfunction, as the interference is suppressed by the selector 7. The bounce pulses that occur when the sensor contacts of the unit are closed or opened do not trigger devices, since they are shorter in duration than the selection threshold, and only after the end of the bounce pulses does a signal appear at the output of the selector 7 and the position of the contacts of the sensors of block 3 is recorded in register 4.

In the event that it becomes necessary to re-enter the same information, i.e. if the trigger 11 is in the zero state, then a pulse is supplied from the higher-level device to the input 12 and, similarly to the described one, information is read through the information output unit 18.

The selector 7 (Fig.Z) works as follows.

In the initial state, at the input of the set selector, there is no single signal and the counter 26 is in the zero state, despite the fact that the pulses of the generator 33 through the And 34 element are received at its summing input, there’s no signal at the output of the And 37 element and the output of the selector.

When a single signal appears at the input of the selector 7, the operation of the counter 36 is allowed and it begins to count the pulses arriving at its summing input. If the pulse width at the input is less than the selection threshold? (in this case, a number less than A is fixed in the counter 36), then 'at the time of the end of a single signal, the counter 36 is set to zero and the signal is not output to the selector output. If the duration of the pulse at the input is greater than the selection threshold, then at the moment when the pulse at the summing input of the counter 36 expires and writes the number A to the counter 36, the And 37 element is activated and a signal appears at the output of the selector 7. At the same time, the AND element 34 is closed through the element HE 38 and the impulses of the generator 3> 3 are stopped at the summing input of the counter. At the end of the pulse at the input of the selector, the counter 36 is set to zero and the signal disappears at the output of the And 37 element and the output of the selector. The selector 7 is returned to its original state. Thus, in this case at the output of the selector is formed of duration e _Ekl) pulse ₍₌ ^{<D E L} _{Bb |. X} ^and pulse width respectively at the output and input of the selector 7).

The value of the selection threshold is set greater than the duration of the bounce pulses and individual interference.

Unit 18 of the information is as follows.

In the initial state, at the control input of block 18, there is no signal and the decoder 28 is closed.

At the time of the appearance of a single signal at the control input of the block, the operation of the decoder 28 is allowed. After that, at the input 19 and, accordingly, the address inputs of the block are given in random order codes of the numbers of information words (groups of bits of register 4). When submitting the code. at the input 19, a signal appears at the corresponding output of the decoder 28 and the group of elements And 29 corresponding to this code opens and the state of this group of bits of the register 4 through the elements And 29 and OR 30 is issued to the output 20 and further to the higher level device. After applying a pulse to input 13, trigger 24 of synchronization unit 1 is set to zero and removes the enable signal from the control input of block 18, which is set to its initial state.

Thus, at any change in the state of discrete sensors, a signal is generated about this and the new position of the sensors is written in a register, i.e. eliminates the possibility of loss of information and conducting the process according to outdated information. In addition, the possibility of recording false information is excluded, In addition, excluded.

241247 the ability to record false information arising from contact bounce and interference in the channels connecting the sensor contacts to the register, i.e. ₅ increases the reliability of the device.

Claims (2)

one The invention relates to computing technology and can be used to input information from discrete sensors to real-time control systems. The purpose of the invention is to increase the reliability of the device by eliminating the loss of input information. Figure 1 shows the functional electrical circuit of the device proposed; Fig.2 is a block diagram of discrete sensors; on fig.Z - diagram of the pulse selector. The device contains a unit 1 renonization, a unit 2 control register, a unit 3 discrete sensors,. register 4, group of 5 elements EXCLUSIVE OR, third element OR 6, selector 7, fourth 8 and second 9 elements, AND, second element OR 10, second trigger 11, inputs and outputs 12-15 of the device, information outputs 16 of the device of the first group, the outputs of the block 17 discrete sensors, block 18. issuing information, the first information input 19 and information outputs 20 of the device group, the second. delay element 21, first element 22, first element 23, first trigger 24, third element 25, first delay element 26, driver 27, decoder 28, group AND elements 29 and group 30 OR elements. The discrete sensor block consists from contacts of 31 sensors and elements NOT 32.- The selector contains, the generator 33 pulses, the first element And 34, 40, the first element is NOT 35, the counter 36, the second element is And 37 and the second element is NOT 38. The block of discrete sensors also includes the first 39 and the second 40 groups of resistors. Input 12 is supplied from a device. the highest level pulse at the moment when it is necessary to read information about the position of the sensors of block 3. Input 13 is fed from the higher level device by a pulse at the moment of the end of reading the position information of the sensors of block 3. The trigger 11 and the trigger 24 of the synchronization block 1 are the clock input is triggered from the front pulse pulses applied to these inputs, and at the input 241247 reset is set to zero when a pulse arrives at these inputs. The EXCELENT SHW unit of group 5 controls the fall or mismatch of the bit position of the register 4 and the contact of the corresponding sensor of the block 3, and if there is a discrepancy between their positions, a single signal is issued (from the series of microcircuits 10-K 155 as this element can be used chip K 155LP5). Register 4 is designed to record and store information about the position of the contacts of the sensors of unit 3. Thus, when the device for inputting information is operating, register 4 can be in one of two modes: storing information and recording information in 20 parallel form; (recording the position of the contacts of the sensors of unit 3). As the register 4 can be used chips K 155IR1 or K155IR13. Pre-25 synchronization unit 1 is assigned to synchronize the operation of a device for reading information from discrete sensors and a higher level device, i.e. to prevent the release of information during 30 entries in the register of new position of objects and recording of new position of objects in the register during information output. The register control unit 2 is intended to be installed ,, register 4 in the desired mode. The duration of the impulse given by the shape of the tele 27 is set sufficiently dp with the register register 4. 50 When the contact of the sensor 31 is open, the zero signal is present at the corresponding output of the block 3, and when the closed position is one. The values of resistors 39 and 40 are selected based on the fact that the input element NE 32 acted signal, sufficient level and current for a clear response of these elements. Pulse selector 7 is designed to suppress the pulses that occur when the contacts of sensors of block 3 bounce, and interference pulses that occur in the channels connecting the outputs of block 3 to the information inputs of register 4. Selector. 7 suppresses everything and,, the ratio of which is lower than the selection threshold bc,. When the contact of the sensor 31 is open, the zero signal is present at the corresponding output of the block 3, and when the closed position is one. The values of resistors 39 and 40 are selected based on the fact that the input element NE 32 acted signal, sufficient level and current for a clear response of these elements. Pulse selector 7 is designed to suppress the pulses that occur when the contacts of sensors of block 3 bounce, and interference pulses that occur in the channels connecting the outputs of block 3 to the information inputs of register 4. Selector. 7 suppresses everything and,, the ratio of which is lower than the selection threshold bc,. A device for reading information from discrete sensors operates as follows. In the initial state, the register 4 is in the Information storage mode, while its position corresponds to the position of the contacts of discrete sensors 31 of block 3, trigger 11 is in the zero position at the outputs of the ICS unit of the CHA1CEE OR group 5, at the output of the OR 6 element and at the output selector 7 signals are missing. Trigger 24 in block 1 is in the zero state. When the contact of any sensor of block 3 is closed or open, the signal changes at the corresponding output of block 3 and at the second input of the corresponding EXCLUSIVE OR element of group 5, at the output of which a single signal appears through the WL 6 element to the input of the pulse selector 7. After a time E d, a signal appears at the output of the selector 7, which closes the element 22 and triggers the delay unit 21, and the synchronization unit 1 sets the trigger 11 at its leading edge. At input 15, the change appears He says that new information has appeared. Through the time delay f, the signal from the output of the delay element 21 is fed through the open element I 25 to the first output of the synchronization unit 1 and then to the input of the register control unit 2. The signal from the input of the unit 2 starts the delay element 26 and goes to the first and second outputs unit 2, register 4 is transferred to the mode Write information in parallel code. After a delay time Tj, a signal appears at the output of element 26, and the driver 27 emits an impulse, in which per. The horn 4 records the position of the contacts of the sensors of the block 3. Since the position of the register 4 now corresponds to the position of the contacts of the sensors of the block 3, the signal at the output of the corresponding element EXCLUSIVE OR group 5 disappears, at the output of the element OR 6 and at the output of the selector 7, the element AND 22 block I synchronization and the device is ready to receive a signal from the device of the highest level to issue information. Trigger 11 is one. no state and gives a signal about the appearance of new information. After a time ,, not less than a G. (0 time of recording in register 4 of the new position of the contacts of the sensors of unit 3, 0 five 0 5 5 0 5 o five 0 five H C25 - s. 2 t- L (, C6 st where t (, 5 + tc4 + ty C6  with,- ,.., . t, t is the response time of the elements of AND 25, register 4, EXCLUSIVE OR groups 5, OR 6 and selector 7 when it is set to the zero state, t is the pulse duration emitted by the shaper 27, at input 12 feeds a pulse, while trigger 24 is set to one position, and trigger 11 is set to zero. At input 15, the signal change disappears (for a higher level device, this is a signal that allows information to be read). Further, the information issuing unit 18 provides information recorded in register 4 to the device of the highest level. Upon completion of reading the information, an impulse is applied to the input 13 and in block 1 the trigger 24 is set to the zero position. A device for reading information from discrete sensors returns to its original state. If another sensor of block 3 is triggered before the end of the information, the corresponding element EXCLUSIVE OR groups 5, the element OR 6, the selector 7 and the trigger 11 are set to one, the output of the new state No sensors 3. However, the signal from the output of the selector 7 is not passed to the output of synchronization unit 1, since the trigger 24 is in one state. After the end of the information output, the trigger 24 is set to the zero state by a pulse from the output 13. Next, the new state of the sensors of the unit 3 in the register-4 is recorded in the same way as described. If the pulse at the input 12 start. the input is given to the signal from the output of the selector 7, then in the synchronization unit 1, the trigger 24 remains in the zero position, since the element 22 is closed, and the trigger 11 remains in the single position, signaling that the signal at the beginning of the output of the information is not accepted In this case, the device of the highest level, after time f, must re-impulse to input 12. In the event that a line interfering with the contacts of sensors 3 with elements EXCLUSIVE OR of group 5 interferes, a false triggering does not occur because the interference is suppressed by the selector 7. The bounce pulses that occur when the contacts are closed or open The sensors of block 3 also do not trigger the device, since they are less than the selection threshold in duration, and only after the end of the bouncing pulses the signal appears at the output of the selector 7 and the contact position of the sensors of block 3 is recorded in regis mp 4 In the event that it becomes necessary to re-enter the same information, i.e. if the trigger 11 is in the zero state, then a pulse is fed from the higher-level device to the input 12 and the information is read in the same way as described through the information output unit I8. The selector 7 (fig.Z) works as follows. In the initial state, there is no single signal at the input of the collector and the counter 26 is in the zero state despite the fact that its summing input receives the generator pulses 33 through the element 34, the output of the element 37 and the output of the selector . When a single signal appears at the input of the selector 7, the operation of the counter 36 is allowed and it begins to count the pulses arriving at its summing input. If the pulse duration at the input is less than the selection threshold of the DB (in this case, the counter 36 has a fixed number less than A), then at the moment the single signal ends, the counter 36 is set to the zero state and no signal is output to the output of the selector. If the pulse duration at the input is greater than the selection threshold, then at the moment when the summing input of the counter 36 has expired, the pulse recorded in the counter 36 is number A, the element And 37 is triggered and the output of the selector 7 appears 5 0 5 0 five 0 „ 0 0, 5 five signal. At the same time, the AND 34 element is closed through the FIE 38 element and the totalizer input of the counter stops receiving generator pulses 33. At the moment the pulse ends at the selector input, the counter 36 is set to the zero state and the signal disappears at the output of the And 37 element and the selector output. The selector 7 returns to the original co. Thus, in this case, at the output of the selector, an impulse of duration   D Bwx pulse duration, respectively, at the output and input of the selector 7). The value of the cG selection threshold is set longer than the bounce pulse duration and individual interferences. Unit 18 issuance of information works as follows. In the initial state, there is no signal at the control input of block 18 and the decoder 28 is closed. At the time of the appearance of a single signal, the operation of the decoder 28 is permitted at the control input of the block. After that, the input 19 and, respectively, the address inputs of the block are given in random order codes of word information numbers (groups of bits of the register 4J. When the code is fed. input 19-a signal appears at the corresponding output of the decimator 28 and the group of elements corresponding to this code is opened AND the state of this group of register 4 bits 4 is output through output 29 and OR 30 to output 20 Level After filing The pulse to the input 13 trigger 24 of the synchronization unit 1 is set to the zero state and removes the enable signal from the control input of the unit 18, which is set to the initial state. Thus, with any change in the state of discrete sensors, a signal is generated about this and a new position of the sensors is recorded in the register, i.e. eliminates the possibility of losing information and maintaining a technological process for obsolete information. In addition, the possibility of recording false information is excluded. In addition, the possibility of recording false information resulting from contact bounce and interference in the channels connecting the sensor contacts with the register, i.e. device reliability is increased. Invention Formula A device for entering information containing the register, the first and second elements OR, the decoder, the first group of elements AND and the first group of elements OR, the register reset input is the device reset, the information inputs of the decoder are information inputs of the first group of device, the outputs the decoder is connected to one input of elements AND of the first group, the other inputs of which are connected to the outputs of the register, a. the outputs - with the inputs of the elements OR of the first group, the outputs of which are the information outputs of the first group of the device, the outputs of the register. are information outputs of the second group of the device, the control input of the decoder is connected to the non-inverted 5 output of the first trigger, characterized in that, in order to increase the reliability of the device by eliminating the loss of input information, four AND elements are introduced into it, the third OR element, the second trigger, the selector , the group of EXCLUSIVE OR elements, the second group of AND elements, the second group of OR elements, the driver and the delay elements, the first inputs of the first AND element and the first IL element are synchronous inputs and outputs, respectively, are connected to the synchronous input and the Reset input of the first trigger, the data input of which is connected to the bus of the logical unit of the device, and the non-inverting and inverting outputs, respectively, to the first inputs of the second And element and the third And element, the output of which is connected to the control to the register input and through serially connected first delay element and driver to the register synchronous input, the information inputs of which are the information inputs of the second device group, and the outputs are connected To one of the inputs of the EXCLUSIVE SHS elements, the other inputs of which are connected to the information inputs of the second group of the device, the outputs of the EXCLUSIVE OR elements are connected to the inputs of the third OR element, the output of which is connected to the selector input, the output of which is connected to the second input of the first element AND to the first input the fourth element, And through the second element-delay - to the second input of the third element And, the outputs of the fourth and second elements And connected to the inputs of the second element OR, the output of which is connected to the synchronous the second trigger, the non-inverting output of which is the output of the device Change and is connected to the second input of the second element AND, and the inverting output is connected to the data input of the second trigger and the second input of the fourth element AND, the second input of the first element OR. and the Reset input of the second trigger are the Reset Device input. 2. The device according to claim 1, which is: the selector contains a counter, elements AND, elements NOT and a pulse generator, the output of which is connected to the first input of the first element And whose output is connected to the counter input of the counter and through the first the element is NOT - with one input of the second element AND the other inputs of which are connected to the outputs of the counter, the input Reset of which is the input of the selector, the output of the second element AND through the second element is NOT connected to the second input of the first element AND and is the output of the selector. Vshody fzg 2 Jj 3 " -one g S Output -o 35 Sign about OR 37 FIG.