Button inching self-locking circuit
By designing a button jog self-locking circuit, the hardware maintenance of the self-locking state after emergency stop is achieved using components such as photocouplers and transistors, solving the problem that traditional self-locking buttons cannot jog and emergency stop, and improving equipment safety and user experience.
Patent Information
- Application Number
- CN202421548420.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The traditional self-locking button remains self-locked after an emergency stop, and cannot achieve jog emergency stop operation, which increases the workload of the operator and reduces the user experience.
A button-activated self-locking circuit is designed to maintain an emergency stop state through hardware, and the equipment can only be restored until the release action is released, including the power supply terminal, anti-collision strip group, the first switch assembly, the second switch assembly and the release assembly, and the self-locking and unlocking control is achieved using components such as the photocoupler and transistor.
It improves the safety and user experience of the equipment, has a simple and reliable structure, and can restore the equipment operation without power off after an emergency stop.
Smart Images
Figure CN223079003U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of industrial automation control, and particularly relates to a button jog self-locking circuit. Background Art
[0002] In an industrial automation control system, the safety control of a motor is crucial. To prevent accidents during equipment operation, an emergency stop button is usually required to quickly cut off the power supply of the motor to achieve emergency stop. The traditional method is to directly cut off the power supply of the motor driver. Although this method can quickly stop the motor operation, the motor needs to be powered on again after each emergency stop to resume operation, which not only increases the workload of the operator but also reduces the user experience.
[0003] In addition, in some special application scenarios, such as safety devices like anti-collision strips, a jog emergency stop operation needs to be achieved. Jog emergency stop means that when a danger occurs, the emergency stop is triggered by briefly pressing a button, and this state is not maintained when there is no danger. However, the traditional self-locking button does not meet this requirement, and it will maintain the self-locking state after being pressed until manually released. Summary of the Utility Model
[0004] To solve the above problems, the utility model proposes a new self-locking circuit. This circuit can transmit a signal to a driving member during an emergency stop. The driving member controls the equipment to stop and maintains this stop state through hardware to enter the self-locking state until there is a release action to resume the operation of the equipment. This design not only improves the safety of the equipment but also improves the user experience.
[0005] The utility model is realized through the following technical solutions:
[0006] A button jog self-locking circuit, characterized in that it includes a power supply terminal, an anti-collision strip group, a first switch component, a second switch component, and an emergency stop input terminal connected in sequence; the anti-collision strip group is used to conduct when a danger occurs, so as to conduct the power supply terminal and the first switch component, so that the first switch component conducts; the second switch component is used to conduct when the first switch component conducts, so as to conduct the power supply terminal and the emergency stop input terminal to achieve emergency stop; the power supply terminal is connected to the second switch component, the output terminal of the second switch component is connected to the input terminal of the first switch component, and when the second switch component conducts, the power supply terminal is conducted to the input terminal of the first switch component, and the equipment enters the self-locking state; it further includes a release component connected to the input terminal of the first switch component, and the release component is used to control the first switch component to cut off when the self-locking state needs to be released.
[0007] Further, the first switch component includes a first switch tube. The control end of the first switch tube is connected to one end of the anti-collision strip group away from the power supply end. One of the two electrode ends of the first switch tube is grounded, and the other is connected to the second switch component.
[0008] Further, the second switch component includes a second switch tube. The control end of the second switch tube is connected to the first switch component. The two electrode ends of the second switch tube are respectively connected to the power supply end and the emergency stop input end.
[0009] Further, the second switch component further includes a voltage stabilizing diode and a second resistor connected in parallel between the common end of the power supply end and the second switch tube and the common end of the first switch component and the second switch tube.
[0010] Further, a current limiting resistor is connected in series between the output end of the second switch component and the input end of the first switch component.
[0011] Further, a signal conversion component is further provided between the emergency stop input end and the second switch component. The signal conversion component includes a third switch tube. The control end of the third switch tube is connected to the output end of the second switch component. One of the electrodes of the third switch tube is grounded, and the other is connected to the emergency stop input end.
[0012] Further, the release component includes a fourth switch tube and a second opto-coupler. The control end of the fourth switch tube is connected to the main control board or the release button, and is used to transmit a level signal to the control end of the fourth switch tube, so as to control the cut-off or conduction of the fourth switch tube. One of the two electrodes of the fourth switch tube is grounded, and the other is connected to the second opto-coupler. The cut-off or conduction of the fourth switch tube controls the cut-off or conduction of the second opto-coupler. The second opto-coupler is connected to the power supply.
[0013] Further, the anodic end of the light emitting source of the second opto-coupler is connected to the power supply, and the cathodic end is connected to the electrode of the fourth switch tube. One end of the light receiver of the second opto-coupler is grounded, and the other end is connected to the input end of the first switch component.
[0014] Further, the self-locking circuit further includes a transmission component connected to the output end of the second switch component, and is used to transmit the emergency stop signal to the main controller.
[0015] Further, the transmission component includes a first opto-coupler. One end of the light emitting source of the first opto-coupler is connected to the output end of the second switch component, and the other end is grounded. One end of the light receiver of the first opto-coupler is grounded, and the other end is connected to the main controller. The light receiver is also connected to the power supply through a pull-up resistor.
[0016] Compared with the prior art, the technical solution of the present utility model and its beneficial effects are as follows:
[0017] (1) The self-locking circuit of the present utility model transmits a signal to the emergency stop input terminal (driving part) during emergency stop. The driving part controls the equipment to stop and maintains this stop state through hardware, entering the self-locking state, without powering off the equipment or the equipment driving part, and the operation of the equipment can only be restored until there is a release action. This design not only improves the safety of the equipment but also improves the user experience.
[0018] (2) For the release component of the present utility model, the base of the fourth switching tube is continuously set low under normal conditions, and the fourth switching tube is cut off, so that the second optocoupler is cut off, thereby ensuring that the conduction of the first switching tube is only controlled by the anti-collision strip group, and further accurately judging whether the motor operation encounters a dangerous situation.
[0019] (3) The self-locking circuit of the present utility model has a simple structure, is practical and reliable. Description of the Drawings
[0020] Figure 1 is a schematic block diagram of a button jog self-locking circuit provided by Embodiment 1 of the present utility model;
[0021] Figure 2 is a schematic diagram of a button jog self-locking circuit provided by Embodiment 1 of the present utility model;
[0022] Figure 3 is a schematic diagram of a button jog self-locking circuit provided by Embodiment 2 of the present utility model.
[0023] Illustration:
[0024] Power supply terminal - 10; Anti-collision strip group - 20; First switch assembly - 30; Second switch assembly - 40; Emergency stop input terminal - 50; Release component - 60; Transmission component - 70; Signal conversion component - 80. Detailed Embodiments
[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0026] Embodiment 1
[0027] See also Figure 1 A button-activated self-locking circuit comprises a power supply terminal 10, an anti-collision strip group 20, a first switch component 30, a second switch component 40, and an emergency stop input terminal 50 connected in sequence; the anti-collision strip group 20 is used to be turned on when a danger occurs so that the power supply terminal 10 is turned on with the first switch component 30, so that the first switch component 30 is turned on; the second switch component 40 is used to be turned on when the first switch component is turned on, so as to turn on the power supply terminal with the emergency stop input terminal, and the high level of the power supply terminal is transmitted from the emergency stop input terminal to the device driver to realize the emergency stop of the equipment. In order to facilitate understanding and expression, the device in the following text is specifically taken as an example of a motor.
[0028] The power supply terminal 10 is connected to the second switch component 40, and the output end of the second switch component 40 is connected to the input end of the first switch component 30. When the second switch component 40 is turned on, the power supply terminal 10 is turned on to the input end of the first switch component 30, so that the first switch component 30 is continuously turned on, and then the second switch component is continuously turned on, and the motor drive component continuously receives the emergency stop signal, so that the motor enters a self-locking state.
[0029] It also includes a release component 60 connected to the input end of the first switch component 30. The release component 60 is used to control the first switch component 30 to be cut off when the self-locking state needs to be released, so that the second switch component 40 is cut off, thereby disconnecting the power supply terminal 10 and the emergency stop input terminal 50, and the motor drive component releases the emergency stop of the motor.
[0030] For details, see Figure 2 The first switch assembly 30 includes a first switch tube. The first switch tube of this embodiment is an NPN transistor Q1. The base of the NPN transistor Q1 is connected to the end of the anti-collision strip group 20 away from the power supply terminal 10. The emitter of the NPN transistor Q1 is grounded GND, and the collector is connected to the second switch assembly 40. When the anti-collision strip group 20 is turned on, the power supply terminal 10 provides a high level to the base of the transistor Q1, and the NPN transistor Q1 is turned on.
[0031] The second switch component 40 includes a second switch tube. In this embodiment, the first switch tube is a PMOS transistor Q2. The gate of the PMOS transistor Q2 is connected to the collector of the NPN transistor Q1. The source of the PMOS transistor Q2 is connected to the power supply terminal 10. The drain of the PMOS transistor Q1 is connected to the emergency stop input terminal 50. When the NPN transistor Q1 is turned on, the NPN transistor Q1 inputs a high level to the gate of the PMOS transistor Q2, causing the PMOS transistor Q2 to turn on. As a result, the power supply terminal 10 is connected to the emergency stop input terminal 50, and the emergency stop input terminal 50 inputs the high level of the power supply terminal to the motor driving component. After receiving the high level from the emergency stop input terminal 50, the motor driving component drives the motor to stop urgently. At the same time, a resistor R1 is connected between the drain of the PMOS transistor Q2 and the base of the NPN transistor Q1. That is, when the PMOS transistor Q2 is turned on, the power supply terminal 10 is connected to the base of the NPN transistor Q1, so that the base of the NPN transistor Q1 continuously receives a high level and remains turned on, the PMOS transistor Q2 remains turned on, and the motor driving component drives the motor to enter a self-locking state of continuous stop.
[0032] The second switch component 40 further includes a zener diode D1 and a second resistor R2 that are respectively connected in parallel between the drain and the gate of the PMOS transistor Q2. The zener diode D1 is used to clamp and protect the Vgs of the PMOS transistor Q2.
[0033] Continue to refer to Figure 2 , the release component 60 includes a triode Q4 and an optocoupler U2. The base of the triode Q4 is connected to the main control board or the release button. The main control board or the release button is used to transmit a level signal to the base of the triode Q4 to control the cut-off or conduction of the triode Q. In this embodiment, the triode Q4 is an NPN type triode. When a high level is input to the base of the triode Q4, the triode Q4 is turned on. The emitter of the triode Q4 is grounded, and the collector is connected to the light-emitting source of the optocoupler U2. The light-emitting source of the optocoupler U2 is connected to the 5V power supply. Thus, when the triode Q4 is turned on, the optocoupler U2 is also turned on and conducts.
[0034] Specifically, the anode terminal of the light-emitting source of the optocoupler U2 is connected to the 5V power supply, and the cathode terminal is connected to the collector of the triode Q4. One end of the light-receiving device of the optocoupler U2 is grounded, and the other end is connected to the base of the triode Q1. When the main control board or the release button inputs a high level to the base of the triode Q4 to control the triode Q4 and the optocoupler U2 to conduct, the light-receiving device of the optocoupler U2 is turned on, so that the base of the triode Q1 is connected to the ground, and the triode Q1 is turned off.
[0035] It can be understood that the base of the triode Q4 is continuously set low under normal conditions, so that the optocoupler U2 is cut off, thereby ensuring that the conduction of the triode Q1 is only controlled by the anti-collision strip group 20, and then accurately judging whether the motor operation encounters a dangerous situation. When it is necessary to release the self-locking state, a short-time high level, such as a high level of 1.5S, is sent to the base of the triode Q4. It can be that the main controller sends a high level of 1.5S to the base of the triode Q4, or it can be pressing the button for 1.5S, so that the high level is conducted with the base of the triode Q4, and then the button is released, the button resets, and the base of the triode Q4 is set low.
[0036] The self-locking circuit of this embodiment further includes a transmission component 70 connected to the drain of the PMOS transistor Q2, which is used to transmit the emergency stop signal to the main controller (not shown). The transmission component 70 includes an optocoupler U1. The anode of the light-emitting source of the optocoupler U1 is connected to the drain of the MOS transistor Q2, and the cathode is grounded; one end of the light-receiving device of the optocoupler U1 is grounded, and the other end is connected to the main controller; a 3.3V power supply is also connected between the light-receiving device and the main controller through a pull-up resistor R6. When entering the emergency stop, the PMOS transistor Q2 is turned on, the power supply terminal 10 is connected to the light-emitting source of the optocoupler U1, the optocoupler U1 is turned on, and the potential of the end of the resistor R6 far from the 3.3V power supply is pulled low, thereby transmitting a low-level signal to the main controller. When working normally, the optocoupler U1 is cut off, and a high-level signal is transmitted to the main controller.
[0037] Embodiment 2
[0038] The basic principle of this embodiment is the same as that of Embodiment 1. The difference is that in this embodiment, the emergency stop input terminal 50 is low-level effective. Therefore, a signal conversion component 80 is also provided between the emergency stop input terminal 50 and the second switch component 40.
[0039] Refer to Figure 3 , the signal conversion component 80 includes a triode Q3. The base of the triode Q3 is connected to the drain of the PMOS transistor Q2. The emitter of the triode Q3 is grounded, and the collector is connected to the emergency stop input terminal 50. When entering the emergency stop, the base of the triode Q3 receives a high level and is turned on, so that the emergency stop input terminal 50 is conducted with the ground, and the emergency stop input terminal 50 inputs a low level to the motor driving part.
[0040] The above description shows and describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be within the scope of the present invention's concept through the above teachings or the technology or knowledge in related fields. Any modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the protection scope of the appended claims of the present invention.
Claims
1. A button jog self-locking circuit, characterized in that It includes a power supply terminal, an anti-collision strip group, a first switch component, a second switch component, and an emergency stop input terminal connected in sequence; the anti-collision strip group is used to conduct when a danger occurs, so as to conduct the power supply terminal and the first switch component, so that the first switch component conducts; the second switch component is used to conduct when the first switch component conducts, so as to conduct the power supply terminal and the emergency stop input terminal to achieve emergency stop. The power supply terminal is connected to the second switch component, the output terminal of the second switch component is connected to the input terminal of the first switch component, and when the second switch component conducts, the power supply terminal is conducted to the input terminal of the first switch component, and the device enters a self-locking state. It also includes a release component connected to the input terminal of the first switch component, and the release component is used to control the first switch component to cut off when it is necessary to release the self-locking state.
2. The push-button jog self-locking circuit according to claim 1, characterized in that, The first switch component includes a first switch tube, the control end of the first switch tube is connected to the end of the anti-collision strip group away from the power supply terminal, and one of the two electrode ends of the first switch tube is grounded and the other is connected to the second switch component.
3. The push-button momentary self-locking circuit according to claim 1, characterized in that, The second switch component includes a second switch tube, the control end of the second switch tube is connected to the first switch component, and the two electrode ends of the second switch tube are respectively connected to the power supply terminal and the emergency stop input terminal.
4. The self-locking circuit for button jogging according to claim 3, wherein The second switch component also includes a voltage stabilizing diode and a second resistor connected in parallel between the common terminal of the power supply terminal and the second switch tube and the common terminal of the first switch component and the second switch tube.
5. A button jog self-locking circuit according to claim 1, characterized in that, A current limiting resistor is connected in series between the output terminal of the second switch component and the input terminal of the first switch component.
6. The self-locking circuit for button jogging according to claim 1, wherein A signal conversion component is also arranged between the emergency stop input terminal and the second switch component. The signal conversion component includes a third switch tube. The control end of the third switch tube is connected to the output terminal of the second switch component, and one of the electrodes of the third switch tube is grounded and the other is connected to the emergency stop input terminal.
7. A push-button momentary self-locking circuit according to claim 1, wherein, The release component includes a fourth switch tube and a second optocoupler. The control end of the fourth switch tube is connected to the main control board or a release button, and is used to transmit a level signal to the control end of the fourth switch tube, so as to control the cut-off or conduction of the fourth switch tube; one of the two electrodes of the fourth switch tube is grounded and the other is connected to the second optocoupler, and the cut-off or conduction of the fourth switch tube controls the cut-off or conduction of the second optocoupler; the second optocoupler is connected to the power supply.
8. A push-button momentary self-locking circuit according to claim 7, characterized in that The anode end of the light emitting source of the second optocoupler is connected to the power supply, the cathode end is connected to the electrode of the fourth switch tube, one end of the light receiver of the second optocoupler is grounded, and the other end is connected to the input terminal of the first switch component.
9. A push-button momentary self-locking circuit according to claim 1, characterized in that, It also includes a transmission component connected to the output terminal of the second switch component, which is used to transmit the emergency stop signal to the main controller.
10. The push-button momentary self-locking circuit according to claim 9, wherein The transmission component includes a first optocoupler. One end of the light emitting source of the first optocoupler is connected to the output terminal of the second switch component and the other end is grounded; one end of the light receiver of the first optocoupler is grounded and the other end is connected to the main controller. A power supply is also connected between the light receiver and the main controller through a pull-up resistor.