CN109799453B - Switch electromagnetic valve control monitoring circuit and method - Google Patents
Switch electromagnetic valve control monitoring circuit and method Download PDFInfo
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- CN109799453B CN109799453B CN201910054622.5A CN201910054622A CN109799453B CN 109799453 B CN109799453 B CN 109799453B CN 201910054622 A CN201910054622 A CN 201910054622A CN 109799453 B CN109799453 B CN 109799453B
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Abstract
The invention discloses a control monitoring circuit and a method for a switching solenoid valve, which relate to the technical field of control and monitoring of the solenoid valve, and the circuit comprises a current monitoring circuit and a voltage monitoring circuit, wherein the current monitoring circuit comprises a field-effect tube and a current detection module, the drain electrode of the field-effect tube is connected with the power supply end of a switching solenoid valve loop after passing through the current detection module, and the source electrode of the field-effect tube is grounded after passing through a resistor RS; the current detection module is used for collecting the working current I of the field effect transistor when the field effect transistor is conducted0Comparing the current with a current threshold value, and judging the on-off state of a switch electromagnetic valve loop; the voltage monitoring circuit is used for collecting the source output voltage U of the field effect transistor when the field effect transistor is not conducted0And comparing the voltage with a voltage threshold value to judge the on-off of the switch electromagnetic valve loop. The switch electromagnetic valve control monitoring circuit has the advantages of simple structure, convenience in operation and long service life, and can monitor a switch electromagnetic valve loop in real time, thereby ensuring stable control and safe and reliable operation of the switch electromagnetic valve.
Description
Technical Field
The invention relates to the technical field of control and monitoring of electromagnetic valves, in particular to a control monitoring circuit and method for a switching electromagnetic valve.
Background
The hydraulic system on the traditional special vehicle adopts a large number of switch electromagnetic valves for hydraulic loop control, and mainly adopts a small electromagnetic relay to control the switch electromagnetic valves, the mode has higher price, the action life times of the electromagnetic relay are limited, and adhesion or mechanical faults are easy to occur; in addition, the method can not monitor whether the circuit of the switching solenoid valve is in a broken circuit state or a normal connection working state, which is easy to bring harm to users in the process of controlling the switching solenoid valve and also bring great trouble to troubleshooting of the control circuit. At present, the monitoring method of the control loop of the switch electromagnetic valve is less, the specificity is stronger, and the monitoring of the control loop of the switch electromagnetic valve is difficult to adapt to the multi-working condition of special vehicles.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a control and monitoring circuit and a method for a switching solenoid valve, which can monitor a switching solenoid valve loop in real time.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a switching solenoid control monitoring circuit, comprising:
the current monitoring circuit comprises a field effect tube and a current detection module, wherein the drain electrode of the field effect tube is connected with the power supply end of the switching solenoid valve loop after passing through the current detection module, and the source electrode of the field effect tube is grounded after passing through a resistor RS; the current detection module is used for collecting the working current I of the field effect transistor when the field effect transistor is conducted0Comparing the current with a current threshold value, and judging the on-off state of a switch electromagnetic valve loop;
a voltage monitoring circuit connected with the grid of the field effect tube and used for collecting the output voltage U of the source electrode of the field effect tube when the field effect tube is not conducted0And comparing the voltage with a voltage threshold value to judge the on-off of the switch electromagnetic valve loop.
On the basis of the technical scheme, the voltage monitoring circuit comprises a comparator and a resistor RP, the output end of the comparator is connected with the grid electrode of the field-effect tube, the positive input end of the comparator is connected with the source electrode of the field-effect tube, one end of the resistor RP is connected with the power supply end of the switch electromagnetic valve loop, and the other end of the resistor RP is connected with the positive input end of the comparator.
On the basis of the technical scheme, the voltage monitoring circuit further comprises a reference voltage U0l, reference voltage U0l is connected to the inverting input of a comparator, a reference voltage U0l is a voltage threshold when U0＜U01, the electromagnetic valve switching loop is in a passage state when U0＞U01, the electromagnetic valve switching loop is in an open-circuit state.
On the basis of the technical scheme, the voltage monitoring circuit further comprises a microprocessor, wherein the microprocessor is connected with the field effect tube through an optical coupling isolation module and used for controlling the on-off electromagnetic valve loop to work and feeding back a monitoring result of the voltage monitoring circuit.
On the basis of the technical scheme, the detection end of the current detection module is connected with the microprocessor.
On the basis of the technical scheme, the microprocessor is provided with a preset current I when the field effect transistor is conducted0l, a predetermined current I0l is the current threshold when I0＞I0l, the circuit of the switch electromagnetic valve is in a passage state when I0＜I0And l, the electromagnetic valve switching loop is in an off state.
On the basis of the technical scheme, the device further comprises a freewheeling diode VD, the cathode of the freewheeling diode VD is connected with the source electrode of the field effect transistor, and the anode of the freewheeling diode VD is grounded.
The invention also provides a method for controlling and monitoring the switch electromagnetic valve, which comprises any one of the switch electromagnetic valve control and monitoring circuits, and the method comprises the following steps:
when the field effect transistor is conducted, the current detection module of the current monitoring circuit collects the working current I of the field effect transistor0Comparing the current with a current threshold value, and judging the on-off state of a switch electromagnetic valve loop;
when the field effect tube is not conducted, the source electrode output voltage U of the field effect tube is collected through the voltage monitoring circuit0And comparing the voltage with a voltage threshold value to judge the on-off of the switch electromagnetic valve loop.
On the basis of the technical scheme, the voltage monitoring circuit comprises a reference voltage U0l, the voltage threshold is a reference voltage U0l when U is present0＜U0l, the electromagnetic valve circuit is in a closed state when U0＞U0And l, the electromagnetic valve switching loop is in an off state.
On the basis of the technical scheme, the current threshold is the preset current I when the field effect transistor is conducted0l, when I0＞I0l, the circuit of the switch electromagnetic valve is in a passage state when I0＜I0l, the switch electromagnetic valve loop is in an open circuit state
Compared with the prior art, the invention has the advantages that:
(1) the switch electromagnetic valve control monitoring circuit is simple in structure, convenient to operate and long in service life, and can monitor a switch electromagnetic valve loop in real time, so that the switch electromagnetic valve is stable in control and safe and reliable in operation.
(2) According to the switching solenoid valve control monitoring circuit, the microprocessor can control the source electrode output of the field effect tube through the optical coupling isolation module, so that the switching solenoid valve loop is controlled to work.
(3) The on-off state of the control loop of the switching electromagnetic valve can be monitored no matter whether the field effect tube is conducted or not by the switching electromagnetic valve control monitoring circuit; when the field effect tube is conducted, the working current I of the field effect tube is collected by the comparative current monitoring circuit0Preset current I when conducting with field effect transistor set in microprocessor0l, judging the on-off of a switch electromagnetic valve loop; when the field effect tube is not conducted, the source electrode output voltage U of the field effect tube is collected by the comparative voltage monitoring circuit0And a reference voltage U0And l, judging the on-off of the electromagnetic valve loop.
Drawings
Fig. 1 is a schematic circuit diagram of a switching solenoid valve control monitoring circuit according to embodiment 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a switching solenoid valve control monitoring circuit, which is used for monitoring on/off of a switching solenoid valve loop in real time, so as to ensure stable control and safe and reliable operation of the switching solenoid valve.
The on-off solenoid valve control monitoring circuit of this embodiment includes current monitoring circuit and voltage monitoring circuit. The current monitoring circuit comprises a field effect tube and a current detection module, wherein the drain electrode of the field effect tube is connected with the power supply end of the switching solenoid valve loop after passing through the current detection module, and the source electrode of the field effect tube is grounded after passing through a resistor RS; the current detection module is used for collecting the working current I of the field effect transistor when the field effect transistor is conducted0And comparing the current with a current threshold value to judge the on-off state of the switch electromagnetic valve loop. The voltage monitoring circuit is connected with the grid of the field effect transistor and used for collecting the source output voltage U of the field effect transistor when the field effect transistor is not conducted0And comparing the voltage with a voltage threshold value to judge the on-off of the switch electromagnetic valve loop.
The drain electrode of the field effect tube is connected with the power supply end of the switching solenoid valve loop after passing through the current detection module, and when the field effect tube is conducted, the current detection module is used for collecting the working current I of the field effect tube0And judging the on-off of the electromagnetic valve loop. The grid of the field effect transistor is connected with a voltage monitoring circuit, and when the field effect transistor is not conducted, the voltage monitoring circuit is used for collecting the source electrode output voltage U of the field effect transistor0And judging the on-off of the electromagnetic valve loop. Therefore, whether the field effect tube controls the output or not, the on-off state of the switching electromagnetic valve control loop can be monitored in real time.
Example 2
This example differs from example 1 in that: the voltage monitoring circuit comprises a comparator and a resistor RP, wherein the output end of the comparator is connected with the grid electrode of the field-effect tube, the positive input end of the comparator is connected with the source electrode of the field-effect tube, one end of the resistor RP is connected with the power supply end of the switching electromagnetic valve loop, and the other end of the resistor RP is connected with the positive input end of the comparator.
The voltage monitoring circuit further comprises a reference voltage U0l, the reference voltage U0l and the inverting input terminal of the comparatorEven, reference voltage U0I is the above voltage threshold. When U is turned0＜U01, the switching electromagnetic valve loop is in a passage state when U is detected0＞U01, the on-off solenoid valve loop is in an off state.
In the control monitoring circuit of the switching electromagnetic valve in the embodiment of the invention, when the field effect tube is not conducted, the positive input end of the comparator is connected with the source electrode of the field effect tube so as to acquire the source electrode output voltage U of the field effect tube0The reference voltage U is input to the inverting input terminal of the comparator0l, outputting the source electrode of the field effect tube with voltage U0And a reference voltage U0l, comparing to judge the loop state of the switch electromagnetic valve.
Example 3
The present embodiment differs from the above embodiments in that: the switch electromagnetic valve control monitoring circuit further comprises a microprocessor, and the microprocessor is connected with the field effect tube through the optical coupling isolation module to control the operation of the switch electromagnetic valve loop and feed back the monitoring result of the voltage monitoring circuit. The control signal IN and the feedback state signal ST of the microprocessor are connected with the optical coupling isolation module, and the microprocessor can control the operation of the switching solenoid valve loop under the condition that the microprocessor controls the output of the source electrode of the field effect tube through the optical coupling isolation module.
The detection end of the current detection module is also connected with the microprocessor. The microprocessor is provided with a preset current I when the field effect tube is conducted0l, the above-mentioned preset current I0l is the current threshold. When I is0＞I0l, the electromagnetic valve circuit is in a passage state when I is0＜I0And l, the switching electromagnetic valve loop is in an off state.
In the embodiment of the invention, when the field effect tube is conducted, the input end of the current detection module is connected with VCC of a power supply, the output end of the current detection module is connected with the drain electrode of the field effect tube, the detection end of the current detection module is connected with the microprocessor, and the current detection module is used for collecting the working current I of the field effect tube0And is in parallel with a preset current I set in the microprocessor0l comparing to judgeAnd switching on and off the state of the electromagnetic valve loop.
Example 4
The present embodiment is different from the above embodiments in that: the switch electromagnetic valve control monitoring circuit also comprises a fly-wheel diode VD, the cathode of the fly-wheel diode VD is connected with the source electrode of the field effect tube, and the anode of the fly-wheel diode VD is grounded GND.
In this embodiment, when two poles of the freewheeling diode VD are impacted by high energy in a reverse transient state, it can change the high impedance between the two poles into a low impedance, absorb the surge power up to several kilowatts, clamp the voltage between the two poles at a predetermined value, effectively protect the precision components in the electronic circuit from being damaged by the surge pulse, thereby playing a good role in protecting the whole circuit.
In this embodiment, the field effect transistor is an N-channel MOS transistor.
Referring to fig. 1, in the switching solenoid valve control monitoring circuit of this embodiment, a microprocessor is connected with a field effect transistor through an optical coupling isolation module to control a switching solenoid valve loop to work. When the field effect transistor is switched on, the resistor RP is in a short-circuit state, the current detection module, the field effect transistor and the resistor RS form a passage, and the current detection module is used for collecting the working current I of the field effect transistor0And a preset current I when the current I is conducted with a field effect transistor arranged in the microprocessor0l are compared. If the control circuit of the switching electromagnetic valve is in a connected state, Io is Vcc/RS + Vcc/RSwitch electromagnetic valve，I0＞I0l; if the control loop of the switch electromagnetic valve is in an open circuit state, I0＝Vcc/RS，I0＜I0l。
When the field effect tube is not conducted, the current flowing through the current detection module and the field effect tube is not existed any more, and simultaneously, the signal between the field effect tube and the microprocessor is interrupted, at the moment, the resistor RP and the resistor RS form a channel, the source electrode output voltage Uo of the field effect tube is collected through the positive input end of the comparator, and is compared with the reference voltage Uol. If the control loop of the switch electromagnetic valve is in a connection state, then,
U0＜U0l; if the control loop of the switch electromagnetic valve is in an open circuit state,
U0＞U0l。
specifically, in this embodiment, the power supply terminal VCC of the switching solenoid valve loop is 24V, the resistor RP is 50K Ω, and the resistor RS is 12.5K Ω, U0l is 1V, I0l is 100mA, and the resistance value of the switch electromagnetic valve is about 24 omega.
Under the condition that the field effect tube is conducted, if the control loop of the switching electromagnetic valve is in a connection state, the working current I of the field effect tube0Is 1.0019A, I0＞I0l; if the control loop of the switch electromagnetic valve is in an open circuit state, the working current I of the field effect tube0Is 0.0019A, I0＜I0l。
Under the condition that the field effect tube is not conducted, if the control loop of the switching electromagnetic valve is in a connection state, the source electrode of the field effect tube outputs a voltage U0Is 0.01V, U0＜U0l; if the control loop of the switch electromagnetic valve is in an open circuit state, the source electrode of the field effect tube outputs a voltage U0Is 4.8V, U0＞U0l。
Example 5
The embodiment of the invention provides a method for controlling and monitoring a switch electromagnetic valve, which is based on the method for controlling and monitoring a circuit by each switch electromagnetic valve, and comprises the following steps:
when the field effect transistor is conducted, the current detection module of the current monitoring circuit collects the working current I of the field effect transistor0Comparing the current with a current threshold value, and judging the on-off state of a switch electromagnetic valve loop;
when the field effect tube is not conducted, the source electrode output voltage U of the field effect tube is collected through the voltage monitoring circuit0And comparing the voltage with a voltage threshold value to judge the on-off of the switch electromagnetic valve loop.
In this embodiment, the voltage monitoring circuit includes a reference voltage U0l, the voltage threshold is a reference voltage U0l when U is present0＜U0l, the electromagnetic valve switching loop is in a passage state; when U is turned0＞U0And l, the electromagnetic valve switching loop is in an off state.
In this embodiment, the current threshold is a preset current I when the FET is turned on0l, when I0＞I0l, the electromagnetic valve switching loop is in a passage state; when I is0＜I0And l, the electromagnetic valve switching loop is in an off state.
The on-off solenoid valve control monitoring circuit and the on-off solenoid valve control monitoring method are simple in structure and convenient to operate, can monitor the on-off solenoid valve loop in real time, accordingly ensure stable control and safe and reliable operation of the on-off solenoid valve, and can be suitable for control and loop monitoring of on-off solenoid valves of equipment in other fields.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A switch solenoid valve control monitoring circuit, its characterized in that, it includes:
the current monitoring circuit comprises a field effect tube and a current detection module, wherein the drain electrode of the field effect tube is connected with the power supply end of the switching solenoid valve loop after passing through the current detection module, and the source electrode of the field effect tube is grounded after passing through a resistor RS; the current detection module is used for collecting the working current I of the field effect transistor when the field effect transistor is switched on0Comparing the current with a current threshold value, and judging the on-off state of a switch electromagnetic valve loop;
if I0If the current is greater than the current threshold value, judging that the switching electromagnetic valve loop is in a passage state; if I0If the current is smaller than the current threshold, judging that the switching solenoid valve loop is in an open circuit state;
a voltage monitoring circuit connected to the gate of the FET for collecting the signalsWhen conducting, its source electrode outputs voltage U0Comparing the voltage with a voltage threshold value, and judging the on-off state of a switch electromagnetic valve loop;
if U is0If the voltage is greater than the voltage threshold, judging that the switching solenoid valve loop is in an open circuit state; if U is0And if the voltage is smaller than the voltage threshold value, judging that the switching electromagnetic valve loop is in a passage state.
2. The switching solenoid valve control monitoring circuit of claim 1, wherein: the voltage monitoring circuit comprises a comparator and a resistor RP, the output end of the comparator is connected with the grid electrode of the field-effect tube, the positive input end of the comparator is connected with the source electrode of the field-effect tube, one end of the resistor RP is connected with the power supply end of the switch electromagnetic valve loop, and the other end of the resistor RP is connected with the positive input end of the comparator.
3. The switching solenoid valve control monitoring circuit of claim 2, wherein: the voltage monitoring circuit further comprises a reference voltage U0l, the reference voltage U0l is connected with the reverse input end of the comparator, and the reference voltage U0l is the voltage threshold value when U0＜U01, the electromagnetic valve switching loop is in a passage state when U0＞U01, the electromagnetic valve switching loop is in an open-circuit state.
4. The switching solenoid valve control monitoring circuit of claim 1, wherein: the micro-processor is connected with the field effect tube through the optical coupling isolation module and used for controlling the switching solenoid valve loop to work and feeding back the monitoring result of the voltage monitoring circuit.
5. The switching solenoid valve control monitoring circuit of claim 4, wherein: and the detection end of the current detection module is connected with the microprocessor.
6. The switching solenoid valve control monitoring circuit of claim 5, wherein:the microprocessor is provided with a preset current I when the field effect tube is conducted0l, the preset current I0l is the current threshold when0＞I0l, the circuit of the switch electromagnetic valve is in a passage state when I0＜I0And l, the electromagnetic valve switching loop is in an off state.
7. The switching solenoid valve control monitoring circuit of claim 1, wherein: the device also comprises a freewheeling diode VD, wherein the cathode of the freewheeling diode VD is connected with the source electrode of the field effect transistor, and the anode of the freewheeling diode VD is grounded.
8. A switching solenoid valve control monitoring method comprising a switching solenoid valve control monitoring circuit according to any one of claims 1-7, the method comprising:
when the field effect transistor is conducted, the current detection module of the current monitoring circuit collects the working current I of the field effect transistor0Comparing the current with a current threshold value, and judging the on-off state of a switch electromagnetic valve loop; if I0If the current is greater than the current threshold value, judging that the switching electromagnetic valve loop is in a passage state; if I0If the current is smaller than the current threshold, judging that the switching solenoid valve loop is in an open circuit state;
when the field effect tube is not conducted, the source electrode output voltage U of the field effect tube is collected through the voltage monitoring circuit0Comparing the voltage with a voltage threshold value, and judging the on-off state of a switch electromagnetic valve loop; if U is0If the voltage is greater than the voltage threshold, judging that the switching solenoid valve loop is in an open circuit state; if U is0And if the voltage is smaller than the voltage threshold value, judging that the switching electromagnetic valve loop is in a passage state.
9. The on-off solenoid valve control monitoring method according to claim 8, characterized in that: the voltage monitoring circuit comprises a reference voltage U0l, the voltage threshold is a reference voltage U0l when U is present0＜U0l, the electromagnetic valve circuit is in a closed state when U0＞U0l, the electromagnetic valve circuit is in the off stateThe way state.
10. The on-off solenoid valve control monitoring method according to claim 8, characterized in that: the current threshold is a preset current I when the field effect tube is conducted0l, when I0＞I0l, the circuit of the switch electromagnetic valve is in a passage state when I0＜I0And l, the electromagnetic valve switching loop is in an off state.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6483688B1 (en) * | 2000-07-12 | 2002-11-19 | Mac Valves, Inc. | Control circuit for solenoid valve assembly |
| US6493204B1 (en) * | 1999-07-09 | 2002-12-10 | Kelsey-Hayes Company | Modulated voltage for a solenoid valve |
| JP2006108267A (en) * | 2004-10-04 | 2006-04-20 | Honda Motor Co Ltd | Drive device of solenoid valve |
| CN201016412Y (en) * | 2006-12-25 | 2008-02-06 | 江苏万工科技集团有限公司 | Electromagnetic valve control circuit for air jet loom |
| CN201731530U (en) * | 2010-04-27 | 2011-02-02 | 海尔集团公司 | Switch valve control circuit and gas stove having same |
| CN203335983U (en) * | 2013-03-18 | 2013-12-11 | 广东普洛测控科技有限公司 | Low power consumption solenoid valve drive circuit |
| CN104110704A (en) * | 2014-07-21 | 2014-10-22 | 安徽科技学院 | Gas leakage preventing device |
| CN104656015A (en) * | 2015-02-03 | 2015-05-27 | 中国航天空气动力技术研究院 | Table type device for testing performance parameters of electromagnetic valve |
| CN204515085U (en) * | 2015-02-03 | 2015-07-29 | 中国航天空气动力技术研究院 | The desk-top testing apparatus of magnetic valve performance parameter |
| CN204948040U (en) * | 2015-08-24 | 2016-01-06 | 长沙市博巨兴电子科技有限公司 | A kind of metal-oxide-semiconductor current foldback circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090131525A (en) * | 2008-06-18 | 2009-12-29 | 현대모비스 주식회사 | Solenoid valve power supply circuit |
-
2019
- 2019-01-21 CN CN201910054622.5A patent/CN109799453B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6493204B1 (en) * | 1999-07-09 | 2002-12-10 | Kelsey-Hayes Company | Modulated voltage for a solenoid valve |
| US6483688B1 (en) * | 2000-07-12 | 2002-11-19 | Mac Valves, Inc. | Control circuit for solenoid valve assembly |
| JP2006108267A (en) * | 2004-10-04 | 2006-04-20 | Honda Motor Co Ltd | Drive device of solenoid valve |
| CN201016412Y (en) * | 2006-12-25 | 2008-02-06 | 江苏万工科技集团有限公司 | Electromagnetic valve control circuit for air jet loom |
| CN201731530U (en) * | 2010-04-27 | 2011-02-02 | 海尔集团公司 | Switch valve control circuit and gas stove having same |
| CN203335983U (en) * | 2013-03-18 | 2013-12-11 | 广东普洛测控科技有限公司 | Low power consumption solenoid valve drive circuit |
| CN104110704A (en) * | 2014-07-21 | 2014-10-22 | 安徽科技学院 | Gas leakage preventing device |
| CN104656015A (en) * | 2015-02-03 | 2015-05-27 | 中国航天空气动力技术研究院 | Table type device for testing performance parameters of electromagnetic valve |
| CN204515085U (en) * | 2015-02-03 | 2015-07-29 | 中国航天空气动力技术研究院 | The desk-top testing apparatus of magnetic valve performance parameter |
| CN204948040U (en) * | 2015-08-24 | 2016-01-06 | 长沙市博巨兴电子科技有限公司 | A kind of metal-oxide-semiconductor current foldback circuit |
Non-Patent Citations (1)
| Title |
|---|
| 基于ARM7的喷气织机电磁阀控制电路;郭张军等;《机电工程》;20120731;第29卷(第7期);全文 * |
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