CN115173849A

CN115173849A - Control device capable of changing turn-on or turn-off stepping direction

Info

Publication number: CN115173849A
Application number: CN202110359095.6A
Authority: CN
Inventors: 肖强晖; 谭学武; 彭思程; 邓江伟; 张阳; 张鹏程; 廖无限; 刘贺
Original assignee: Hunan University of Technology
Current assignee: Hunan University of Technology
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2022-10-11

Abstract

The invention discloses a control device capable of changing the turn-on or turn-off stepping direction, which comprises a starting stepping module, an emergency stop module, a stepping direction module, a stop stepping module, a starting control module, a stop control module and a start, stop and protection module; the starting stepping module and the stopping stepping module respectively send corresponding stepping signals on the basis of the stepping direction module, and the starting, stopping and protecting module receives the emergency stop signals generated by the emergency stop module, also receives the control signals generated by the starting control module and the stopping control module, and generates corresponding control output signal clusters for transmitting, driving or indicating to a circuit corresponding to the next stage. Compared with the prior art, the control device capable of changing the on or off stepping direction has the characteristics of simple structure, low cost, small volume and low power consumption, not only has the function of randomly changing the on or off stepping direction, but also can realize the random expansion of the number of controlled objects.

Description

Control device capable of changing turn-on or turn-off stepping direction

Technical Field

The invention relates to the field of electrical control, in particular to a control device capable of changing the on or off stepping direction.

Background

In the field of electrical control, control requirements and applications of sequential on, sequential off, reverse on and reverse off are generally required, and the technology at the present stage mainly adopts a pure electromagnetic relay, a PLC and an MCU to realize control, wherein the electromagnetic relay is controlled by pure hardware, and the PLC and the MCU are controlled by combining software and hardware.

The inventor discovers that in the process of implementing the embodiment of the invention:

in the prior art, a pure electromagnetic relay is adopted, and compared with PLC and MCU control, the pure electromagnetic relay is reliable, but has relatively large volume, relatively high cost and relatively large power consumption; the PLC and MCU are adopted for control, so that although the volume is reduced, the development cost of software and hardware is relatively high; the existing devices are difficult to realize the arbitrary capacity expansion of the controlled objects with low cost, and have poor universality.

In a word, a control device which has the characteristics of simple structure, low cost, small volume and low power consumption, can freely change the on or off stepping direction and can realize the arbitrary capacity expansion of the number of controlled objects is lacking at present.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a control device capable of changing the on or off stepping direction, and the specific technical scheme is as follows:

the system comprises a starting stepping module, an emergency stop module, a stepping direction module, a stopping stepping module, a starting control module, a stopping control module and a starting, protecting and stopping module;

the starting stepping module sends a stepping signal for starting control and acts on the starting control module;

the stop stepping module sends a stepping signal for stopping control and acts on the stop control module;

the step direction module sends a step direction signal for positive sequence control or negative sequence control and acts on the starting control module and the stopping control module;

the emergency stop module sends out a zero clearing signal to act on the starting control module and the stopping control module to promote the starting control module and the stopping control module to return to a zero state on one hand, and sends out an emergency stop signal to act on the starting, stopping and stopping modules on the other hand;

the starting control module generates a corresponding cluster of starting control signals according to signals generated by the starting stepping module, the stepping direction module and the emergency stop module in a certain sequence and then acts on the starting, stopping and protecting module;

the stop control module generates a corresponding cluster of stop control signals according to the signals generated by the stop stepping module, the stepping direction module and the emergency stop module in a certain sequence and then acts on the start, stop and protection module;

the start-hold-stop module is a circuit with a plurality of start-hold-stop functions and is used for transmitting, driving or indicating to a circuit corresponding to the next stage.

Further, the starting stepping module comprises a stepping button S1 and a pull-down resistor R1, and a starting stepping signal X1 is set to act on the starting control module and is used for generating a starting control signal; the step button S1 is a normally open button, one end of the step button S1 is connected with a power supply VCC, the other end of the step button S1 is connected with one end of a pull-down resistor R1 and a starting step signal X1, and the other end of the pull-down resistor R1 is connected with a power supply ground;

the step stopping module comprises a step button S4 and a pull-down resistor R3, and is provided with a step stopping signal X6 which acts on the stop control module and is used for generating a stop control signal; the step button S4 is a normally open button, one end of which is connected to the power source VCC, the other end of which is connected to one end of the pull-down resistor R3 and the step stop signal X6, and the other end of the pull-down resistor R3 is connected to the power source ground.

Further, the emergency stop module comprises an emergency stop button S2, a pull-up resistor R2 and a NOT gate G1, and a zero clearing signal X2 and an emergency stop signal X3 are also arranged; the zero clearing signal X2 acts on the starting control module and the stopping control module and prompts the starting control module and the stopping control module to return to a zero state, and the emergency stop signal X3 acts on the starting protection module and prompts the starting protection module and the stopping protection module to generate an emergency stop action;

the emergency stop button S2 is a normally open button, one end of the emergency stop button S is connected with the power ground, the other end of the emergency stop button S is connected with one end of the pull-up resistor R2, the input end of the NOT gate G1 and the zero clearing signal X2, the other end of the pull-up resistor R2 is connected with the power VCC, and the output end of the NOT gate G1 is connected with the emergency stop signal X3.

Further, the step direction module comprises a step direction switch S3 and a NOT gate G2, and a positive sequence step direction signal X4 and a negative sequence step direction signal X5 are set and are both acted on the start control module and the stop control module;

the step direction switch S3 is a single-pole double-throw switch and comprises a fixed end and two movable ends, wherein the fixed end is a public end and is connected with the input end of the NOT gate G2 and a reverse step direction signal X5, one movable end is connected with a power supply VCC, and the other movable end is connected with a power supply ground; the output end of the not gate G2 is connected to the positive sequence step direction signal X4.

Furthermore, the starting control module and the stopping control module have the same circuit structure, and both comprise a 4-bit bidirectional general shift register with the model number of 74LS194, namely a shift register UA1 and a shift register UB1;

a cluster of starting control signals are correspondingly arranged at the Q0 end, the Q1 end, the Q2 end and the Q3 end of the shift register UA1, comprise a starting control signal YA10, a starting control signal YA11, a starting control signal YA12 and a starting control signal YA13 and act on the starting, protecting and stopping module;

a cluster of stop control signals are correspondingly arranged at the Q0 end, the Q1 end, the Q2 end and the Q3 end of the shift register UB1, comprise a stop control signal YB10, a stop control signal YB11, a stop control signal YB12 and a stop control signal YB13 and act on the start-hold and stop module;

the zero clearing signals X2 are connected with MR ends of the shift register UA1 and the shift register UB1; the positive sequence stepping direction signals X4 are connected with the S1 ends of the shift register UA1 and the shift register UB1; the reverse-sequence stepping direction signals X5 are connected with the S0 ends of the shift register UA1 and the shift register UB1; the starting stepping signal X1 is connected with the CLK end of the shift register UA 1; stop step signal X6 is connected to the CLK terminal of shift register UB 1.

Further, after receiving a cluster of start control signals, a cluster of stop control signals and an emergency stop signal X3, the start-hold-stop module is enabled to generate a cluster of control output signals in a corresponding sequence, including a control output signal OUT1, a control output signal OUT2, a control output signal OUT3 and a control output signal OUT4;

in addition, the start-up, protection and stop module comprises four start-up, protection and stop circuits with the same circuit structure, wherein one start-up, protection and stop circuit comprises an OR gate G3, a NOT gate G4, an OR gate G5, an AND gate G6 and a pull-down resistor R4;

the OR gate G3 correspondingly receives one of the cluster of stop control signals generated by the stop control module and the emergency stop signal X3 generated by the emergency stop module, then generates a signal Y1, is connected with one end of the pull-down resistor R4 and the input end of the NOT gate G4, then generates a signal Y4 and transmits the signal Y4 to one input end of the AND gate G6, and the other end of the pull-down resistor R4 is connected with a power ground;

after receiving one of a cluster of starting control signals generated by the starting control module and a signal Y3 generated by the AND gate G6, the OR gate G5 generates a signal Y2 and transmits the signal Y2 to the other input end of the AND gate G6;

the AND gate G6 receives the signal Y4 and the signal Y2 and generates a signal Y3;

the signal Y3 generated by each start-hold circuit is correspondingly connected with one of the cluster of control output signals.

Furthermore, the cascade number of the shift registers in the starting control module is more than 2, and the cascade connection mode is that the Q3 end of the shift register of the previous stage is connected with the SR end of the shift register of the next stage, the SL end of the shift register of the previous stage is connected with the Q0 end of the shift register of the next stage, the SR end of the shift register of the first stage is vacant, and the SL end of the shift register of the last stage is vacant;

the Q0 end, the Q1 end, the Q2 end and the Q3 end of the shift register participating in cascade refer to the starting control signal numbering sequence of the shift register of the previous stage, and set corresponding starting control signals according to the progressive sequence and then carry out numbering;

the MR end of each shift register is accessed with a zero clearing signal X2; the S1 end of each shift register is connected with a positive sequence stepping direction signal X4; the S0 end of each shift register is connected with a reverse-sequence stepping direction signal X5; the CLK end of each shift register is connected with a starting stepping signal X1;

similarly, the cascade number of the shift registers in the stop control module is also more than 2, and is the same as the cascade number of the shift registers in the start control module, and the cascade connection mode is similar to that of the start control module, namely, the Q3 end of the shift register of the previous stage is connected with the SR end of the shift register of the next stage, the SL end of the shift register of the previous stage is connected with the Q0 end of the shift register of the next stage, the SR end of the shift register of the first stage is empty, and the SL end of the shift register of the last stage is empty; the Q0 end, the Q1 end, the Q2 end and the Q3 end of the shift register participating in cascade refer to the stop control signal numbering sequence of the shift register of the previous stage, and set corresponding stop control signals according to the progressive sequence and then carry out numbering;

a zero clearing signal X2 is introduced into the MR end of each shift register, a positive sequence stepping direction signal X4 is introduced into the S1 end of each shift register, a negative sequence stepping direction signal X5 is introduced into the S0 end of each shift register, and a stop stepping signal X6 is introduced into the CLK end of each shift register.

Furthermore, the number of start-up protection power-off circuits in the start-up protection power-off module is more than 4, and control output signals of the start-up protection power-off modules are sequentially increased;

when a starting control signal to be connected in the starting circuit is added, the starting control signal is correspondingly connected in sequence according to one of a cluster of starting control signals newly generated by a cascade shift register added in a starting control module;

similarly, each added start-up and hold-down circuit is connected with a stop control signal to be connected in turn according to one of a cluster of stop control signals newly generated by a cascade shift register added in the stop control module;

the or gate G3 of each start-hold-stop circuit is also connected with the emergency stop signal X3 generated by the emergency stop module.

The control device has the advantages that the control device capable of changing the on or off stepping direction overcomes the defects of the prior art, has the characteristics of simple structure, low cost, small volume and low power consumption, not only has the function of randomly changing the on or off stepping direction, but also can realize the random expansion of the number of controlled objects.

Drawings

Fig. 1 is a typical schematic diagram of a control device capable of changing the on or off stepping direction according to the present invention.

Fig. 2 is a schematic diagram of an embodiment of a control device for changing the on or off step direction according to the present invention.

FIG. 3 is a schematic diagram of a cascade of shift registers in the start control module according to the present invention.

FIG. 4 is a schematic diagram of a cascade of shift registers in the stop control module according to the present invention.

Fig. 5 is a schematic diagram of start-up, maintenance and shutdown circuit cascade in the start-up, maintenance and shutdown module according to the present invention.

FIG. 6 is a truth table for the selected 4-bit bidirectional general shift register 74LS 194.

Fig. 7 is a specific example of a control device capable of changing the on or off step direction according to the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of a typical control apparatus capable of changing the on/off stepping direction according to the present invention, which includes a starting stepping module, an emergency stop module, a stepping direction module, a stopping stepping module, a starting control module, a stopping control module, and a starting protection module;

the start-stop module is a circuit with a plurality of start-stop functions and is used for transmitting, driving or indicating to a circuit corresponding to the next stage.

Fig. 2 shows an embodiment of a control device for changing the on or off stepping direction according to the present invention, wherein the starting stepping module comprises a stepping button S1 and a pull-down resistor R1, and a starting stepping signal X1 is set to act on the starting control module for generating a starting control signal; the step button S1 is a normally open button, one end of the step button S1 is connected with a power supply VCC, the other end of the step button S1 is connected with one end of a pull-down resistor R1 and a starting step signal X1, and the other end of the pull-down resistor R1 is connected with a power supply ground;

the stop stepping module comprises a stepping button S4 and a pull-down resistor R3, and is provided with a stop stepping signal X6 which acts on the stop control module and is used for generating a stop control signal; the step button S4 is a normally open button, one end of which is connected to the power source VCC, the other end of which is connected to one end of the pull-down resistor R3 and the step stop signal X6, and the other end of the pull-down resistor R3 is connected to the power source ground.

The emergency stop module comprises an emergency stop button S2, a pull-up resistor R2 and a NOT gate G1, and is also provided with a zero clearing signal X2 and an emergency stop signal X3; the zero clearing signal X2 acts on the starting control module and the stopping control module and prompts the starting control module and the stopping control module to recover to a zero state, and the emergency stopping signal X3 acts on the starting protection module and prompts the starting protection module and the stopping protection module to generate an emergency stopping action;

The step direction module comprises a step direction switch S3 and a NOT gate G2, and is provided with a positive sequence step direction signal X4 and a negative sequence step direction signal X5 which both act on the start control module and the stop control module;

The starting control module and the stopping control module have the same circuit structure, and both comprise a 4-bit bidirectional general shift register with the model number of 74LS194, namely a shift register UA1 and a shift register UB1;

the zero clearing signals X2 are connected with MR ends of the shift register UA1 and the shift register UB1; the positive sequence stepping direction signals X4 are connected with the S1 ends of the shift register UA1 and the shift register UB1; the reverse-sequence stepping direction signals X5 are connected with the S0 ends of the shift register UA1 and the shift register UB1; the starting stepping signal X1 is connected with the CLK end of the shift register UA 1; the stop step signal X6 is connected to the CLK terminal of the shift register UB 1.

After the start-hold-stop module correspondingly receives a cluster of start control signals, a cluster of stop control signals and an emergency stop signal X3, the start-hold-stop module is prompted to generate a cluster of control output signals in a corresponding sequence, wherein the cluster of control output signals comprise a control output signal OUT1, a control output signal OUT2, a control output signal OUT3 and a control output signal OUT4;

Fig. 3 is a schematic diagram of cascade connection of shift registers in the start control module according to the present invention, where the number of cascade connections of shift registers in the start control module is greater than 2, and the cascade connection is performed in such a manner that a Q3 terminal of a previous shift register is connected to an SR terminal of a next shift register, an SL terminal of a previous shift register is connected to a Q0 terminal of a next shift register, an SR terminal of a first shift register is left empty, and an SL terminal of a last shift register is left empty;

a zero clearing signal X2 is introduced into the MR end of each shift register, a positive sequence stepping direction signal X4 is introduced into the S1 end of each shift register, a negative sequence stepping direction signal X5 is introduced into the S0 end of each shift register, and a stopping stepping signal X6 is introduced into the CLK end of each shift register.

Fig. 5 is a schematic diagram of a cascade of start-up, maintenance and shutdown circuits in the start-up, maintenance and shutdown module according to the present invention, where the number of start-up, maintenance and shutdown circuits in the start-up, maintenance and shutdown module is greater than 4, and control output signals of the start-up, maintenance and shutdown modules are sequentially increased;

when a start-up and hold-down circuit is added, a start control signal to be connected is sequentially and correspondingly connected according to one of a cluster of start control signals newly generated by a cascade shift register added in a start control module;

the or gate G3 of each start-hold-stop circuit is further connected with an emergency stop signal X3 generated by the emergency stop module.

FIG. 6 shows a truth table for the selected 4-bit bidirectional general shift register 74LS194, which is implemented based on the state 1, the state 4 and the state 6 in the truth table in conjunction with FIG. 2, wherein the state 6 is set to be a reverse step start control state or a reverse step stop control state, the state 4 is set to be a forward step start control state or a forward step stop control state, and the state 1 is set to be a clear control state;

(1) When the step direction switch S3 is connected with a power supply VCC, corresponding to the state 4 of the truth table, namely the start control module enters a positive step start control state, and the stop control module enters a positive step stop control state;

when the step button S1 is pressed down, Q0, Q1, Q2 and Q3 of a shift register UA1 in the control module are started to output high level in sequence;

when the step button S4 is pressed down once, the high level output of Q0, Q1, Q2 and Q3 of the shift register UB1 in the control module is stopped in sequence;

(2) When the step direction switch S3 is powered on, the start control module enters a reverse step start control state corresponding to the state 6 of the truth table, and the stop control module enters a reverse step stop control state;

when the step button S1 is pressed down, Q3, Q2, Q1 and Q0 of a shift register UA1 in the control module are started to output high level in sequence;

when the step button S4 is pressed down once, the high level output of Q3, Q2, Q1 and Q0 of the shift register UB1 in the control module is stopped in sequence;

(3) When the emergency stop button S2 is pressed, Q0, Q1, Q2, and Q3 of the shift register UA1 in the start control module and Q0, Q1, Q2, and Q3 of the shift register UB1 in the stop control module are all cleared to output at a low level corresponding to the state 1 of the truth table.

Fig. 7 shows a specific example of a control device capable of changing the on or off stepping direction according to the present invention, and it can be seen from fig. 2 that four loads connected in series are respectively connected between the start-hold-stop module control output signal OUT1, the start-hold-stop module control output signal OUT2, the start-hold-stop module control output signal OUT3, the start-hold-stop module control output signal OUT4, and the power ground; the four loads connected in series are respectively a current limiting resistor R5 and a light emitting diode LED1, a current limiting resistor R6 and a light emitting diode LED2, a current limiting resistor R7 and a light emitting diode LED3, a current limiting resistor R8 and a light emitting diode LED4.

The working process is as follows:

(1) When the step direction switch S3 is switched to the power supply VCC, the start control module performs positive step start control, and the stop control module performs positive step stop control;

if the step button S1 is pressed every time, Q0, Q1, Q2 and Q3 of a shift register UA1 in the control module are started to output high level sequentially, and a light emitting diode LED1, a light emitting diode LED2, a light emitting diode LED3 and a light emitting diode LED4 are lightened sequentially to realize positive sequence turn-on;

similarly, if the step button S4 is pressed every time, the sequential high-level output of Q0, Q1, Q2, and Q3 of the shift register UB1 in the control module is stopped, and the light-emitting diodes LED1, LED2, LED3, and LED4 are sequentially turned off to realize the positive-sequence turn-off;

(2) When the stepping direction switch S3 is switched to be connected with a power supply ground, the starting control module performs reverse stepping starting control, and the stopping control module performs reverse stepping stopping control;

if the stepping button S1 is pressed every time, Q3, Q2, Q1 and Q0 of a shift register UA1 in the control module are started to output high level sequentially, and a light emitting diode LED4, a light emitting diode LED3, a light emitting diode LED2 and a light emitting diode LED1 are sequentially lightened to realize the opening in a reverse order;

similarly, if the step button S4 is pressed every time, the sequential high-level output of Q3, Q2, Q1, and Q0 of the shift register UB1 in the control module is stopped, and the light-emitting diodes LED4, LED3, LED2, and LED1 are sequentially turned off to realize the reverse turn-off;

(3) When the emergency stop button S2 is pressed, Q0, Q1, Q2 and Q3 of the shift register UA1 in the starting control module and Q0, Q1, Q2 and Q3 of the shift register UB1 in the stopping control module are all cleared, low level output is carried out, and the light emitting diode LED1, the light emitting diode LED2, the light emitting diode LED3 and the light emitting diode LED4 are all extinguished, so that the emergency stop function is realized.

Claims

1. A control device capable of changing the on or off stepping direction is characterized in that,

the device comprises a starting stepping module, an emergency stop module, a stepping direction module, a stopping stepping module, a starting control module, a stopping control module and a starting, protecting and stopping module;

the emergency stop module sends out a zero clearing signal to act on the starting control module and the stopping control module to promote the starting control module and the stopping control module to return to a zero state on one hand, and sends out an emergency stop signal to act on the starting and stopping module on the other hand;

the stop control module generates a corresponding cluster of stop control signals according to the signals generated by the stop stepping module, the stepping direction module and the emergency stop module in a certain sequence and then acts on the start, hold and stop module;

2. A control device capable of changing the direction of on or off stepping according to claim 1,

the starting stepping module comprises a stepping button S1 and a pull-down resistor R1, and is provided with a starting stepping signal X1 which acts on the starting control module and is used for generating a starting control signal; the step button S1 is a normally open button, one end of the step button S1 is connected with a power supply VCC, the other end of the step button S1 is connected with one end of a pull-down resistor R1 and a starting step signal X1, and the other end of the pull-down resistor R1 is connected with a power supply ground;

3. The control device capable of changing the on or off stepping direction according to claim 1, wherein the emergency stop module comprises an emergency stop button S2, a pull-up resistor R2 and a not gate G1, and further comprises a clear signal X2 and an emergency stop signal X3; the zero clearing signal X2 acts on the starting control module and the stopping control module and prompts the starting control module and the stopping control module to recover to a zero state, and the emergency stopping signal X3 acts on the starting protection module and prompts the starting protection module and the stopping protection module to generate an emergency stopping action;

4. The control device capable of changing the on or off step direction according to claim 1, wherein the step direction module comprises a step direction switch S3 and a not gate G2, and a positive step direction signal X4 and a negative step direction signal X5 are set to act on the start control module and the stop control module;

5. The control device as claimed in any one of claims 1 to 4, wherein the start control module and the stop control module have the same circuit structure and each comprise a 4-bit bidirectional general shift register, model 74LS194, respectively shift register UA1 and shift register UB1;

6. The control device capable of changing the on or off stepping direction according to claim 1, claim 3 and claim 5, wherein the start-hold-stop module is configured to generate a cluster of control output signals in a corresponding sequence after receiving a cluster of start control signals, a cluster of stop control signals and the emergency stop signal X3, and the cluster of control output signals comprises a control output signal OUT1, a control output signal OUT2, a control output signal OUT3 and a control output signal OUT4;

the AND gate G6 receives the signal Y4 and the signal Y2 and then generates a signal Y3;

7. The control device according to claim 5, wherein the number of cascaded shift registers in the start control module is greater than 2, and the cascade connection is performed in such a manner that the Q3 terminal of the shift register of the previous stage is connected to the SR terminal of the shift register of the next stage, the SL terminal of the shift register of the previous stage is connected to the Q0 terminal of the shift register of the next stage, the SR terminal of the shift register of the first stage is left empty, and the SL terminal of the shift register of the last stage is left empty;

8. The control device capable of changing the on or off stepping direction according to claim 6 and claim 7, wherein the number of start-stop circuits in the start-stop module is more than 4, and control output signals of the start-stop module sequentially increase;