CN109660239B - Interlocking circuit and application - Google Patents
Interlocking circuit and application Download PDFInfo
- Publication number
- CN109660239B CN109660239B CN201910031102.2A CN201910031102A CN109660239B CN 109660239 B CN109660239 B CN 109660239B CN 201910031102 A CN201910031102 A CN 201910031102A CN 109660239 B CN109660239 B CN 109660239B
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- China
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- voltage
- diode
- switch
- controlled module
- optocoupler
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- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/33—Transmissions; Means for modifying the speed or direction of rotation
- B01F35/332—Transmissions; Means for modifying the speed or direction of rotation alternately changing the direction of rotation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
Abstract
An interlock circuit, comprising: the first switch and the second switch, the first optocoupler and the second optocoupler, the first diode and the second diode. The anode of the first optocoupler input end is connected with the first switch and one end of the first diode, and the other end of the first diode is connected with the cathode of the second optocoupler input end; the anode of the second optocoupler input end is connected with the second switch and one end of the second diode, and the other end of the second diode is connected with the cathode of the first optocoupler input end. When the first switch is closed, the first optocoupler performs output, and the second optocoupler performs output through the first diode; when the second switch is closed, the second optocoupler performs output, and the second diode locks the performed output of the first optocoupler. This interlock inhibits the execution of the output but does not affect the switch trigger signal. The control device is also applied to the control of the stirring cylinder of the stirring truck, so that the purposes of convenience and safety are achieved.
Description
Technical Field
The invention relates to the technical field of control of a multi-user operation platform but only receiving a single state instruction, in particular to an interlocking circuit and application.
Background
The common interlock circuit control mode is: one switch is pressed and the other is locked, i.e. the input of the other circuit is cut off. For example: an electrical interlock circuit with the patent number 2014106069388 is characterized in that when a first path of signal input end enters an output end, a second path of signal input end is directly cut off; similarly, when the second path signal input end enters the output end, the first path signal input end is directly cut off. Both signals cannot be effectively input at the same time.
Some devices have two or more parallel operation controls, but only receive a single state instruction to control the same device. The parallel operation interfaces refer to the same operation control and can be independently controlled.
For example: the plurality of operating handles control the motor to change the forward and reverse states of the load, and at the same time, only the forward rotation instruction of any handle or the reverse rotation instruction of any handle is received.
Also for example: some large-scale punches are provided with control ends at both ends to facilitate control. When the A side is operating, the B side operation function is forbidden to ensure that the device only receives a single state instruction so as to avoid operation conflict. The existing control mode has the following safety defects: when the B side finds that the A side is wrong in operation, the B side cannot perform any effective operation because the input end is cut off. The operation error of the A side happens in the using process of the punch press, and the B side can only see the accident.
The interlocking control mode is not safe enough for the two conditions.
Disclosure of Invention
The present invention has been made in order to improve the safety in the prior art.
An interlock circuit, comprising: the first switch, the second switch, the first voltage-controlled module, the second voltage-controlled module, the first diode and the second diode, wherein the voltage-controlled module at least comprises a first input end, a second input end and an execution output end,
the first input end of the first voltage-controlled module is connected with the first switch and one end of the first diode, and the other end of the first diode is connected with the second input end of the second voltage-controlled module;
the first input end of the second voltage-controlled module is connected with the second switch and one end of the second diode, and the other end of the second diode is connected with the second input end of the first voltage-controlled module.
When the first switch is closed, the first voltage-controlled module performs output, and the second voltage-controlled module performs output through the first diode;
when the second switch is closed, the second voltage control module performs output, and the second diode locks the performed output of the first voltage control module.
The voltage control module utilizes the voltage drop signal to execute output to drive a load, and the voltage drop balance is changed through the diode to realize locking execution output. According to the technical scheme, when the first switch is conducted, the first voltage-controlled module performs output, and meanwhile the second voltage-controlled module performs output function. At this time, the second switch is still triggerable, and the second switch is turned on at this time, and although the second voltage-controlled module function is locked and cannot execute output, the signal triggered by the second switch can also lock the first voltage-controlled module to execute output function. This achieves an interlock that only inhibits the output from being performed, but does not affect the switching trigger signal, i.e., does not shut off the input of the trigger signal.
Further, the interlock circuit is applied to two or more parallel operation controls.
Drawings
FIG. 1 is a schematic diagram of an interlock circuit;
FIG. 2 is a schematic diagram of an optocoupler;
FIG. 3 is a schematic diagram of a voltage controlled equivalent function;
FIG. 4, a schematic diagram of a truck mixer application.
Detailed Description
For the purpose of making the embodiments, technical solutions and advantages of the present specification clearer, one solution of the present specification will be clearly and completely described with reference to the accompanying drawings. It will be apparent that the embodiments described are some, but not all, of the embodiments of this specification. The protection scope of the technical proposal is subject to the claims.
As shown in fig. 1 and 2, an interlock circuit includes: the first switch CC and the second switch CW, the first optocoupler U1 and the second optocoupler U2, the first diode D1 and the second diode D2,
the first switch CC is connected with an anode of the input end of the first optocoupler U1, the anode of the first optocoupler U1 is also connected with a cathode of the input end of the second optocoupler U2 through a first diode D1, and when the first switch CC is closed, the first optocoupler U1 performs output and locks the performed output of the second optocoupler U2 through the first diode D1;
the second switch CW is connected to an anode of the input end of the second optocoupler U2, the anode of the second optocoupler U2 is further connected to a cathode of the input end of the first optocoupler UI through a second diode D2, and when the second switch CW is closed, the second optocoupler U2 performs output and locks the performed output of the first optocoupler UI through the second diode D2.
The other ends of the first switch and the second switch are connected with a power supply VCC.
The anode and the cathode of the optocoupler are equivalent to a first input end and a second input end of the voltage-controlled module, and the emitter and the collector are equivalent to an execution output end of the voltage-controlled module.
Further, the self-locking circuit further comprises a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected between the cathodes of the first diode D1 and the input end of the second optocoupler U2, the other end of the first resistor R2 is grounded, one end of the second resistor R2 is connected between the cathodes of the second diode D2 and the input end of the first optocoupler U1, and the other end of the second resistor R2 is grounded. The resistor is connected to play a protective role.
In the embodiment, the switch CC is turned on, and the output end of the optocoupler U1 performs a task, and the function of the optocoupler U2 for performing the task is locked. At this time, the switch CW is triggerable, and when the switch CW is turned on, the optocoupler U2 is locked to be unable to perform tasks, but the signal triggered by CW may also lock the function of the optocoupler U1 to perform tasks. I.e. CC may lock the U2 execution output, CW may also lock the U1 execution output. Thus, the interlocking is achieved, and the interlocking function prohibits two paths of respective execution outputs without affecting the input of respective switching signals, i.e. without cutting off the functions of the switches CC and CW.
In this circuit, the voltage difference of the other path is changed by the diode, thereby locking the execution output of the other path without suppressing the input of the switching signal, and thus achieving the interlocking function.
As shown in fig. 3, the output pin may be an equivalent optocoupler, and the output may be controlled by changing the voltage.
In practical application, the forward and reverse rotation of a rear-mounted stirring cylinder of the existing stirring truck is controlled in a mechanical mode, and the electric control is a technical development trend to replace mechanical control. The electric control mode is realized by changing the valve direction of the stirring cylinder through motor driving, and the driving motor can be realized through a voltage-controlled circuit.
As shown in fig. 4, a control handle is respectively arranged at two sides of the tail part of the stirring barrel, so that a driver can flexibly operate the stirring barrel after the vehicle. Each control handle is provided with a forward rotation key and a reverse rotation key. To avoid signal collision. The self-locking circuit can be adopted for control. When the mixer truck receives simultaneous opposite operation, the mixer drum stops rotating, so that the safety of control is ensured. Such as: when the left handle is pressed to rotate forwards, the left handle and the right handle are forbidden to rotate backwards to execute output; at this time, the reverse rotation is pressed, the forward rotation execution output on the left side and the reverse rotation execution output on the right side are inhibited, the forward rotation execution output and the reverse rotation execution output are inhibited by each other, and the stirring cylinder stops rotating. In the interlocking mode in the prior art, when the forward rotation is pressed, the reverse button signal is completely cut off, and the reverse button is invalid, so that the forward rotation is normally executed, and vice versa. Unlike the present embodiment, the reverse button signal is still active when the forward rotation is depressed, but the output is disabled, at which time the reverse rotation is depressed, which is manifested as the agitator drum stopping rotation, and vice versa. The interlocking circuit not only can ensure that only single-state instructions are received, but also can improve the safety of operation through mutual restriction.
Of course, the self-locking circuit described in the present application can also be applied to a double operator interface type punch press. When party a finds that party B is operating incorrectly, party B can simultaneously press the opposite operation, forcing the machine to stop. For example, the self-locking circuit of the application is used for controlling the up-and-down movement of the machine. When A, B any party inputs that the machine is operating downward, the machine's upward movement of the implement is disabled. At this time, when any party inputs that the machine is operated upward, the execution function of the downward movement of the machine is also prohibited by the opposite party. By mutually disabling, not only is the machine guaranteed to execute only a single-state instruction task, but also when instructions in different states are received simultaneously, the execution function is disabled, and the machine stops executing no instruction of any party. Assume that: when the A side finds that the B side operates the machine to be wrong downwards, the A side can simultaneously press the upward and downward operations, so that the machine stops moving, and accidents are avoided. Or when party a finds that party B is operating the machine in the up direction, party a may press both up and down operations, causing the machine to stop moving,
the foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the invention to any particular modifications, equivalents, improvements, etc., particularly equivalents of voltage control modules, which are intended to be included within the scope of the present invention, as many people operating control and the like in other application areas will readily appreciate from the disclosure.
Claims (5)
1. An interlock circuit, comprising: the first switch and the second switch, the first voltage-controlled module and the second voltage-controlled module, the first diode and the second diode;
the first switch is connected with a first input end of the first voltage-controlled module, the first input end of the first voltage-controlled module is also connected with a second input end of the second voltage-controlled module through a first diode, a first resistor is also connected between the first diode and the second voltage-controlled module, and the other end of the first resistor is grounded;
when the first switch is closed, the first voltage-controlled module performs output, and the second voltage-controlled module performs output through the first diode;
the second switch is connected with a first input end of the second voltage-controlled module, the first input end of the second voltage-controlled module is also connected with a second input end of the first voltage-controlled module through a second diode, and a second resistor is also connected between the second diode and the first voltage-controlled module;
when the second switch is closed, the second voltage-controlled module performs output, and the second diode locks the performed output of the first voltage-controlled module;
the first switch is conducted, the first diode locks the execution output of the second voltage-controlled module, the second switch is conducted at the moment, and the second diode locks the execution output of the first voltage-controlled module, so that the interlocking purpose is achieved.
2. An interlock circuit as recited in claim 1 wherein: the voltage-controlled module is equivalently replaced by a photocoupler.
3. An interlock circuit as recited in claim 1 wherein: the voltage-controlled module is equivalently replaced by a triode, a first resistor connected with the B pole of the triode and a second resistor connected with the E pole of the triode.
4. An interlock circuit as claimed in any one of claims 1 to 3, wherein: the interlocking circuit is applied to forward and reverse rotation control of the stirring cylinder of the stirring truck.
5. An interlock circuit as claimed in any one of claims 1 to 3, wherein: the interlocking circuit is applied to punch press control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910031102.2A CN109660239B (en) | 2019-01-14 | 2019-01-14 | Interlocking circuit and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910031102.2A CN109660239B (en) | 2019-01-14 | 2019-01-14 | Interlocking circuit and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109660239A CN109660239A (en) | 2019-04-19 |
| CN109660239B true CN109660239B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910031102.2A Active CN109660239B (en) | 2019-01-14 | 2019-01-14 | Interlocking circuit and application |
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| Country | Link |
|---|---|
| CN (1) | CN109660239B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595238A (en) * | 2013-09-29 | 2014-02-19 | 深圳市伟创电气有限公司 | Low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit |
| CN205017207U (en) * | 2015-09-25 | 2016-02-03 | Tcl通力电子（惠州）有限公司 | Switching on and shutting down control circuit and switching power supply |
| CN205211895U (en) * | 2015-11-30 | 2016-05-04 | 中国电子科技集团公司第十六研究所 | Automatically controlled waveguide switch drive arrangement of energy storage formula |
| CN106452044A (en) * | 2016-11-22 | 2017-02-22 | 成都麦隆电气有限公司 | Signal interlock circuit for preventing short circuit of APF (active power filter) driving circuits |
| CN208063168U (en) * | 2018-05-07 | 2018-11-06 | 青岛乾程科技股份有限公司 | A kind of high voltage isolation interlocking switch circuit |
| CN209375602U (en) * | 2019-01-14 | 2019-09-10 | 武汉盛硕电子有限公司 | A kind of interlock circuit |
-
2019
- 2019-01-14 CN CN201910031102.2A patent/CN109660239B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595238A (en) * | 2013-09-29 | 2014-02-19 | 深圳市伟创电气有限公司 | Low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit |
| CN205017207U (en) * | 2015-09-25 | 2016-02-03 | Tcl通力电子（惠州）有限公司 | Switching on and shutting down control circuit and switching power supply |
| CN205211895U (en) * | 2015-11-30 | 2016-05-04 | 中国电子科技集团公司第十六研究所 | Automatically controlled waveguide switch drive arrangement of energy storage formula |
| CN106452044A (en) * | 2016-11-22 | 2017-02-22 | 成都麦隆电气有限公司 | Signal interlock circuit for preventing short circuit of APF (active power filter) driving circuits |
| CN208063168U (en) * | 2018-05-07 | 2018-11-06 | 青岛乾程科技股份有限公司 | A kind of high voltage isolation interlocking switch circuit |
| CN209375602U (en) * | 2019-01-14 | 2019-09-10 | 武汉盛硕电子有限公司 | A kind of interlock circuit |
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| Publication number | Publication date |
|---|---|
| CN109660239A (en) | 2019-04-19 |
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Address after: 430065 3rd floor, Fenglong building, building 19, Huifeng enterprise Tiandi, Gutian 2nd Road, Qiaokou District, Wuhan City, Hubei Province Applicant after: WUHAN SENSOR ELECTRONICS Co.,Ltd. Address before: Building 52, Small and Medium Enterprise City, Baishazhou Bank, Wuhan, Hubei 430065 Applicant before: WUHAN SENSOR ELECTRONICS Co.,Ltd. |
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