CN111795199B - Electromagnetic valve operation monitoring system and method and automatic sorting equipment - Google Patents
Electromagnetic valve operation monitoring system and method and automatic sorting equipment Download PDFInfo
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- CN111795199B CN111795199B CN202010694410.6A CN202010694410A CN111795199B CN 111795199 B CN111795199 B CN 111795199B CN 202010694410 A CN202010694410 A CN 202010694410A CN 111795199 B CN111795199 B CN 111795199B
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- 239000012530 fluid Substances 0.000 claims abstract description 87
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
Abstract
The embodiment of the invention discloses a solenoid valve operation monitoring system, a monitoring method and automatic sorting equipment. The monitoring system comprises an electromagnetic valve body, a control unit and a feedback monitoring unit; the electromagnetic valve body comprises a fluid inlet, a fluid inlet control switch and a fluid outlet; the fluid inlet control switch is arranged at the fluid inlet and is electrically connected with the control unit, and the fluid inlet control switch receives the control signal provided by the control unit and controls the fluid inlet switch to be switched on or switched off according to the control signal; the feedback monitoring unit is arranged at the fluid outlet and is electrically connected with the control unit, and the feedback monitoring unit monitors an outflow signal of the fluid at the fluid outlet, converts the outflow signal into a feedback signal and then sends the feedback signal to the control unit; the control unit monitors the running state of the electromagnetic valve according to the control signal and the feedback signal. According to the technical scheme, the running state of the electromagnetic valve is monitored, and the action accuracy of the electromagnetic valve is improved.
Description
Technical Field
The embodiment of the invention relates to an automatic sorting technology, in particular to a system and a method for monitoring the operation of an electromagnetic valve and automatic sorting equipment.
Background
Solenoid valves are basic automation components for controlling fluids and are frequently used in electromagnetically controlled industrial automation systems. And particularly, high requirements on the speed, dynamic response and precision of the solenoid valve are put forward in high-speed automatic sorting equipment application.
At present, signal output is directly adopted in respective automation equipment to control the starting of an electromagnetic valve, feedback output is not carried out on response signals of the electromagnetic valve, and the working state of the electromagnetic valve cannot be monitored, so that the accuracy and the stability of the action of the electromagnetic valve are influenced.
Disclosure of Invention
The invention provides a system and a method for monitoring the operation of an electromagnetic valve and automatic sorting equipment, which are used for monitoring the operation state of the electromagnetic valve and improving the accuracy of the action of the electromagnetic valve.
In a first aspect, an embodiment of the present invention provides an electromagnetic valve operation monitoring system, where the monitoring system includes an electromagnetic valve body, a control unit, and a feedback monitoring unit;
the solenoid valve body comprises a fluid inlet, a fluid inlet control switch and a fluid outlet;
the fluid inlet control switch is arranged at the fluid inlet, is electrically connected with the control unit, and is used for receiving a control signal provided by the control unit and controlling the fluid inlet switch to be switched on or switched off according to the control signal;
the feedback monitoring unit is arranged at the fluid outlet, is electrically connected with the control unit, and is used for monitoring the outflow information of the fluid at the fluid outlet, converting the outflow signal into a feedback signal and then sending the feedback signal to the control unit;
the control unit is used for monitoring the running state of the electromagnetic valve according to the control signal and the feedback signal.
Optionally, the control signal comprises a first pulse signal comprising a first pulse up signal, a first pulse down signal, and a first pulse duration defined by the first pulse up signal and the first pulse down signal;
the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; the first pulse rising signals correspond to the second pulse rising signals one to one, the first pulse falling signals correspond to the second pulse falling signals one to one, and the first pulse duration time corresponds to the second pulse duration time one to one;
the control unit is configured to monitor an operating state of the solenoid valve according to the first pulse rising signal and the second pulse rising signal corresponding to the first pulse rising signal, or the control unit is configured to monitor an operating state of the solenoid valve according to the first pulse falling signal and the second pulse falling signal corresponding to the first pulse falling signal, or the control unit is configured to monitor an operating state of the solenoid valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration.
Optionally, the electromagnetic valve operation monitoring system further comprises an alarm unit, and the alarm unit is connected with the control unit;
the control module is also used for sending an alarm signal to the alarm unit when judging that the electromagnetic valve operates abnormally according to the control signal and the feedback signal;
the alarm unit is used for receiving the alarm signal and giving an alarm according to the alarm signal.
Optionally, the feedback monitoring unit comprises an air pressure sensor.
Optionally, the feedback monitoring unit comprises a hydraulic sensor.
In a second aspect, an embodiment of the present invention further provides a method for monitoring operation of an electromagnetic valve, which is applied to the system for monitoring operation of an electromagnetic valve in the first aspect, and the method for monitoring operation of an electromagnetic valve includes:
a control signal provided to the fluid inlet control switch to cause the fluid inlet control switch to control the fluid inlet switch or close in accordance with the control signal;
receiving a feedback signal provided by the feedback monitoring unit;
and monitoring the running state of the electromagnetic valve according to the control signal and the feedback signal.
Optionally, the control signal comprises a first pulse signal comprising a first pulse up signal, a first pulse down signal, and a first pulse duration defined by the first pulse up signal and the first pulse down signal;
the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; the first pulse rising signals correspond to the second pulse rising signals one to one, the first pulse falling signals correspond to the second pulse falling signals one to one, and the first pulse duration time corresponds to the second pulse duration time one to one;
monitoring the operating state of the solenoid valve according to the control signal and the feedback signal, including:
monitoring the running state of the electromagnetic valve according to the first pulse rising signal and the second pulse rising signal corresponding to the first pulse rising signal;
or monitoring the running state of the electromagnetic valve according to the first pulse falling signal and the second pulse falling signal corresponding to the first pulse falling signal;
or monitoring the running state of the electromagnetic valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration.
Optionally, monitoring the operation state of the electromagnetic valve according to the first pulse rising signal and the second pulse rising signal corresponding to the first pulse rising signal includes:
when the difference value between the trigger time of the first pulse rising signal and the trigger time of the second pulse rising signal corresponding to the first pulse rising signal is smaller than a set threshold value, judging that the electromagnetic valve normally operates;
when the difference value between the trigger time of the first pulse rising signal and the trigger time of the second pulse rising signal corresponding to the first pulse rising signal is larger than or equal to the set threshold value, judging that the electromagnetic valve is abnormal in operation;
monitoring the operation state of the solenoid valve according to the first pulse falling signal and the second pulse falling signal corresponding to the first pulse falling signal, including:
when the difference value between the trigger time of the first pulse falling signal and the trigger time of the second pulse falling signal corresponding to the first pulse falling signal is smaller than the set threshold value, judging that the electromagnetic valve operates normally;
when the difference value between the trigger time of the first pulse falling signal and the trigger time of the second pulse falling signal corresponding to the first pulse falling signal is larger than or equal to the set threshold value, judging that the electromagnetic valve is abnormal in operation;
monitoring an operating state of the solenoid valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration, including:
when the difference value between the first pulse duration and the second pulse duration corresponding to the first pulse duration is smaller than the set threshold value, judging that the electromagnetic valve normally operates;
and when the difference value between the first pulse duration and the second pulse duration corresponding to the first pulse duration is greater than or equal to the set threshold value, judging that the electromagnetic valve is abnormally operated.
Optionally, the electromagnetic valve operation monitoring system further comprises an alarm unit, and the alarm unit is connected with the control unit;
after monitoring the operating state of the solenoid valve according to the control signal and the feedback signal, the method further comprises the following steps:
and when the operation of the electromagnetic valve is judged to be abnormal, an alarm signal is sent to the alarm unit.
In a third aspect, an embodiment of the present invention further provides an automatic sorting apparatus, including the electromagnetic valve operation monitoring system according to the first aspect.
The monitoring system in the embodiment of the invention comprises an electromagnetic valve body, a control unit and a feedback monitoring unit; the electromagnetic valve body comprises a fluid inlet, a fluid inlet control switch and a fluid outlet; the fluid inlet control switch is arranged at the fluid inlet and electrically connected with the control unit, and the feedback monitoring unit is arranged at the fluid outlet and electrically connected with the control unit. The fluid inlet control switch receives a control signal provided by the control unit and controls the fluid inlet switch to be switched on or off according to the control signal; then the feedback monitoring unit monitors the outflow signal of the fluid at the fluid outlet, converts the outflow signal into a feedback signal and sends the feedback signal to the control unit; the control unit monitors the running state of the electromagnetic valve according to the control signal and the feedback signal. Compared with the prior art, the control signal that directly adopts the control unit to provide controls the start of solenoid valve, does not carry out feedback output to solenoid valve response signal, can't monitor the operating condition of solenoid valve, so can influence this technical scheme of accuracy of solenoid valve action and realized the monitoring to solenoid valve running state, improve the accuracy of solenoid valve action to make the prediction to the life of solenoid valve.
Drawings
Fig. 1 is a structural block diagram of a system for monitoring operation of an electromagnetic valve according to a first embodiment of the present invention;
fig. 2 is a waveform diagram of a control signal provided by the control unit and a waveform diagram of a feedback signal output by the feedback monitoring unit according to an embodiment of the present invention;
FIG. 3 is a block diagram of a system for monitoring operation of a solenoid valve according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for monitoring operation of a solenoid valve according to a second embodiment of the present invention;
fig. 5 is a flowchart of another method for monitoring operation of a solenoid valve according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a block diagram of a solenoid valve operation monitoring system according to an embodiment of the present invention, and as shown in fig. 1, the monitoring system includes a solenoid valve body 10, a control unit 20, and a feedback monitoring unit 30. The solenoid valve body 10 includes a fluid inlet, a fluid inlet control switch 11 and a fluid outlet. The fluid inlet control switch 11 is disposed at the fluid inlet, and is electrically connected to the control unit 20, and is configured to receive a control signal provided by the control unit 20 and control the fluid inlet switch to be turned on or off according to the control signal. The feedback monitoring unit 30 is disposed at the fluid outlet, electrically connected to the control unit 20, and configured to monitor outflow information of the fluid at the fluid outlet, convert the outflow signal into a feedback signal, and send the feedback signal to the control unit 20; the control unit 20 is used for monitoring the operating state of the solenoid valve according to the control signal and the feedback signal.
The solenoid valve body 10 is an automatic basic element for controlling fluid, and is not limited to controlling liquid and gas. The direction, flow, velocity and other parameters of the media can be adjusted in a practical industrial control system. It can be understood that the solenoid valve body 10 includes a fluid inlet and a fluid outlet, and further includes a fluid inlet control switch formed by a solenoid valve coil and a valve body, and the main working principle is to use the electromagnetic force generated by the solenoid valve coil to push the valve body to switch, so as to realize the on-off of the fluid inlet, thereby realizing the smooth flow of the fluid at the fluid inlet out of the fluid outlet. Specifically, the control unit 20 sends a pulse control signal to the solenoid valve coil, and the solenoid valve coil generates electromagnetic force to push the valve body to switch, so as to open or close the fluid inlet. That is, when the fluid inlet control switch 11 receives the control signal provided by the control unit 20, the fluid inlet control switch is controlled to be turned on or off according to the control signal; when receiving a control signal to control a fluid inlet switching signal, the feedback monitoring unit 30 monitors an outflow signal of the fluid at the fluid outlet, for example, the feedback monitoring unit 30 may be a hydraulic sensor or an air pressure sensor, and then the feedback monitoring unit 30 converts the outflow signal into a feedback signal and sends the feedback signal to the control unit 20; the control unit 30 monitors the operational state of the solenoid valve according to the control signal and the feedback signal. Compared with the prior art, the control signal that directly adopts the control unit 20 to provide controls the start of solenoid valve, does not carry out feedback output to solenoid valve response signal, can't monitor the operating condition of solenoid valve, so can influence the accuracy of solenoid valve action, this technical scheme has realized the monitoring to solenoid valve running state, improves the accuracy of solenoid valve action to make the prediction to the life of solenoid valve.
Further, on the basis of the above embodiment, fig. 2 is a waveform diagram of a control signal provided by the control unit and a waveform diagram of a feedback signal output by the feedback monitoring unit according to an embodiment of the present invention, as shown in fig. 2, the control signal includes a first pulse signal, the first pulse signal includes a first pulse rising signal, a first pulse falling signal, and a first pulse duration defined by the first pulse rising signal and the first pulse falling signal; the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; the first pulse rising signals correspond to the second pulse rising signals one by one, the first pulse falling signals correspond to the second pulse falling signals one by one, and the first pulse duration time corresponds to the second pulse duration time one by one;
the control unit 20 is configured to monitor an operation state of the solenoid valve according to the first pulse up signal and the second pulse up signal corresponding to the first pulse up signal, or the control unit 20 is configured to monitor an operation state of the solenoid valve according to the first pulse down signal and the second pulse down signal corresponding to the first pulse down signal, or the control unit 20 is configured to monitor an operation state of the solenoid valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration.
When the difference t0 between the trigger time of the first pulse rising signal provided by the control unit 20 and the trigger time of the second pulse rising signal corresponding to the first pulse rising signal is smaller than the set threshold, the solenoid valve is judged to operate normally. It is understood that when the triggering time of the control unit 20 receiving the second pulse rising signal output by the feedback monitoring unit 30 is later than the triggering time of the first pulse rising signal provided by the control unit 20, and the time difference t0 is within a specific threshold, the solenoid valve is within the normal response time, and the operation state of the solenoid valve is normal. When the control unit 20 receives the trigger time of the second pulse rising signal output by the feedback monitoring unit 30 and the trigger time is later than the trigger time of the first pulse rising signal provided by the control unit 20, and the time difference t0 exceeds a specific threshold, and the response speed of the solenoid valve is slow, it is determined that the operation state of the solenoid valve is abnormal, and it may be that the service life of the solenoid valve reaches a certain limit. Preferably, the specific threshold is 1.5ms, i.e. the normal response time range of the solenoid valve is less than 1.5ms, and the specific threshold is not limited herein. Optionally, when the time difference t1 between the trigger time of the first pulse down signal and the trigger time of the second pulse down signal corresponding to the first pulse down signal is smaller than a specific threshold, the operation state of the monitoring solenoid valve is normal; when the time difference t1 is greater than a certain threshold, then the monitoring solenoid valve is abnormal in operation state; alternatively, when the difference between the first pulse duration provided by the control unit 20 and the second pulse duration corresponding to the first pulse duration is smaller than a specific threshold, the operation state of the monitoring solenoid valve is normal, and when the difference between the first pulse duration and the second pulse duration is larger than the specific threshold, the operation state of the monitoring solenoid valve is abnormal. Therefore, the running state of the electromagnetic valve is monitored by analyzing and comparing the first pulse rising signal, the first pulse falling signal and the first pulse duration of the control signal and the second rising signal, the second pulse falling signal and the second pulse duration of the feedback signal, and the action accuracy of the electromagnetic valve is improved.
Optionally, fig. 3 is a block diagram of a structure of another solenoid valve operation monitoring system according to an embodiment of the present invention, and as shown in fig. 3, the solenoid valve operation monitoring system further includes an alarm unit 40, and the alarm unit 40 is connected to the control unit 20; the control unit 20 is further configured to send an alarm signal to the alarm unit 40 when determining that the solenoid valve operates abnormally according to the control signal and the feedback signal; the alarm unit 40 is used for receiving the alarm signal and giving an alarm according to the alarm signal.
In an exemplary embodiment, when the time difference t1 between the triggering time of the second pulse rising signal output by the feedback monitoring unit 30 and the triggering time of the first pulse rising signal provided by the control unit 20, which is received by the control unit 20, exceeds a specific threshold, the operation of the solenoid valve is abnormal, the control unit sends an alarm signal to the alarm unit 40, and the alarm unit 40 gives an alarm according to the alarm signal, so that the solenoid valve is prevented from generating an erroneous action, the action accuracy of the solenoid valve is improved, and the reliability of the maximum action of the solenoid valve is ensured.
Optionally, the feedback monitoring unit 30 comprises an air pressure sensor.
Optionally, the feedback monitoring unit 30 comprises a hydraulic pressure sensor.
The solenoid valve body 10 is an automated basic element for controlling fluid, and is not limited to controlling liquid and gas; therefore, the feedback monitoring unit 30 may be a hydraulic sensor for monitoring the hydraulic signal flowing out of the solenoid valve body 10; the pressure sensor can also be used for monitoring the pressure signal flowing out of the electromagnetic valve body 10; the hydraulic signal and the air pressure signal which flow out are converted into feedback signals to feed back the running state of the electromagnetic valve.
Example two
Fig. 4 is a flowchart of a solenoid valve operation monitoring method according to a second embodiment of the present invention, where the method is applied to a solenoid valve operation monitoring system according to the first embodiment, and as shown in fig. 4, the method includes:
and S110, providing a control signal to the fluid inlet control switch so that the fluid inlet control switch controls the fluid inlet switch to be switched off or switched on according to the control signal.
The monitoring system comprises an electromagnetic valve body, a control unit and a feedback monitoring unit. The solenoid valve body includes a fluid inlet and a fluid outlet. The electromagnetic valve body also comprises a fluid inlet control switch formed by an electromagnetic valve coil and a valve body, the fluid inlet control switch is arranged at a fluid inlet, and the control unit fluid inlet control switch provides a control signal so that the fluid inlet control switch controls the fluid inlet to be switched on or switched off according to the control signal. Specifically, the control unit sends a pulse control signal to the electromagnetic valve coil, and the electromagnetic force generated by the electromagnetic valve coil pushes the valve body to switch, so that the fluid inlet is opened or closed.
And S120, receiving a feedback signal provided by the feedback monitoring unit.
The feedback monitoring unit is arranged at the fluid outlet, is electrically connected with the control unit, and is used for monitoring an outflow signal of the fluid at the fluid outlet, converting the outflow signal into a feedback signal and then sending the feedback signal to the control unit; the control unit receives the feedback signal provided by the feedback monitoring unit.
And S130, monitoring the running state of the electromagnetic valve according to the control signal and the feedback signal.
Wherein, compare with prior art, directly adopt the start-up of control signal control solenoid valve that the control unit provided, do not carry out feedback output to solenoid valve response signal, can't monitor the operating condition of solenoid valve, the feedback signal that the control unit received feedback monitoring unit and provided among this technical scheme, then according to the operating condition of control signal and feedback signal monitoring solenoid valve, realized the monitoring to solenoid valve operating condition, improved the accuracy of solenoid valve action, ensured the reliability of solenoid valve maximize action. And the service life of the electromagnetic valve is predicted. Specifically, the control signal includes a first pulse signal rising signal, a first pulse falling signal, and a first pulse duration defined by the first pulse rising signal and the first pulse falling signal; the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; and monitoring the running state of the electromagnetic valve according to the first pulse signal rising signal, the first pulse falling signal, the first pulse duration and the second pulse rising signal, the second pulse falling signal and the second pulse duration.
Alternatively, on the basis of the above embodiment, how to monitor the operation state of the solenoid valve according to the control signal and the feedback signal is further described. Specifically, the control signal includes a first pulse signal including a first pulse-up signal, a first pulse-down signal, and a first pulse duration defined by the first pulse-up signal and the first pulse-down signal;
the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; the first pulse rising signals correspond to the second pulse rising signals one by one, the first pulse falling signals correspond to the second pulse falling signals one by one, and the first pulse duration time corresponds to the second pulse duration time one by one;
monitoring the operating state of the solenoid valve according to the control signal and the feedback signal, comprising:
monitoring the running state of the electromagnetic valve according to the first pulse rising signal and a second pulse rising signal corresponding to the first pulse rising signal;
when the difference value between the trigger time of the first pulse rising signal provided by the control unit and the trigger time of the second pulse rising signal corresponding to the first pulse rising signal is smaller than a set threshold value, the electromagnetic valve is judged to normally operate. When the control unit receives the trigger time of the second pulse rising signal output by the feedback monitoring unit and the trigger time of the first pulse rising signal provided by the control unit is later than the trigger time of the first pulse rising signal provided by the feedback monitoring unit, and the time difference is within a specific threshold value, the electromagnetic valve is in a normal response time, and the running state of the electromagnetic valve is normal. When the control unit receives the trigger time of the second pulse rising signal output by the feedback monitoring unit and the trigger time of the first pulse rising signal provided by the control unit is later than the trigger time of the first pulse rising signal provided by the feedback monitoring unit, and the time difference exceeds a specific threshold value, the response speed of the electromagnetic valve is relatively low, and the operating state of the electromagnetic valve is judged to be abnormal.
Or monitoring the running state of the electromagnetic valve according to the first pulse falling signal and a second pulse falling signal corresponding to the first pulse falling signal;
when the time difference between the trigger time of the first pulse falling signal and the trigger time of the second pulse falling signal corresponding to the first pulse falling signal is smaller than a specific threshold value, the running state of the electromagnetic valve is monitored to be normal; when the time difference is equal to or greater than a specific threshold value, the operation state of the monitoring solenoid valve is abnormal.
Alternatively, the operating state of the solenoid valve is monitored as a function of the first pulse duration and a second pulse duration corresponding to the first pulse duration.
When the difference value between the first pulse duration provided by the control unit and the second pulse duration corresponding to the first pulse duration is smaller than a specific threshold value, the running state of the monitoring electromagnetic valve is normal, and when the difference value between the first pulse duration and the second pulse duration is larger than or equal to the specific threshold value, the running state of the monitoring electromagnetic valve is abnormal. Therefore, the running state of the electromagnetic valve is monitored by analyzing and comparing the first pulse rising signal, the first pulse falling signal and the first pulse duration of the control signal and the second pulse rising signal, the second pulse falling signal and the second pulse duration of the feedback signal, the action of the electromagnetic valve is avoided, and the action accuracy of the electromagnetic valve is improved.
Optionally, the electromagnetic valve operation monitoring system further comprises an alarm unit, and the alarm unit is connected with the control unit; further, on the basis of the above embodiment, fig. 5 is a flowchart of another method for monitoring operation of a solenoid valve according to a second embodiment of the present invention, as shown in fig. 5, the method includes the following steps:
and S210, providing a control signal to the fluid inlet control switch so that the fluid inlet control switch controls the fluid inlet switch to be switched on or off according to the control signal.
And S220, receiving a feedback signal provided by a feedback monitoring unit.
And S230, monitoring the running state of the electromagnetic valve according to the control signal and the feedback signal.
And S240, when the electromagnetic valve is judged to be abnormal in operation, sending an alarm signal to an alarm unit.
When the control unit receives that the time difference between the trigger time of the second pulse rising signal output by the feedback monitoring unit and the trigger time of the first pulse rising signal provided by the control unit exceeds a specific threshold, or when the control unit receives that the time difference between the trigger time of the first pulse falling signal output by the feedback monitoring unit and the trigger time of the first pulse rising signal provided by the control unit exceeds a specific threshold; or when the difference value between the first pulse duration provided by the control unit and the second pulse duration corresponding to the first pulse duration is greater than or equal to a specific threshold value, judging that the electromagnetic valve is abnormal in operation, then sending an alarm signal to the alarm unit, and giving an alarm by the alarm unit according to the alarm signal, so that the electromagnetic valve is prevented from generating wrong actions, the action accuracy of the electromagnetic valve is improved, and the reliability of the maximum action of the electromagnetic valve is ensured.
EXAMPLE III
The third embodiment of the invention also provides automatic sorting equipment which comprises the electromagnetic valve operation monitoring system in the first embodiment. The automatic sorting equipment can be applied to the sorting process of food, medicines and electronic components. Since the automatic sorting device includes the electromagnetic valve operation monitoring system in the first embodiment, the automatic sorting device also has the beneficial effects of the first embodiment, and details are not repeated herein. In addition, the automatic sorting equipment also improves the stability of long-time operation and the reliability of sorting results.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. An electromagnetic valve operation monitoring system is characterized by comprising an electromagnetic valve body, a control unit and a feedback monitoring unit;
the solenoid valve body comprises a fluid inlet, a fluid inlet control switch and a fluid outlet;
the fluid inlet control switch is arranged at the fluid inlet, is electrically connected with the control unit, and is used for receiving a control signal provided by the control unit and controlling the fluid inlet switch according to the control signal;
the feedback monitoring unit is arranged at the fluid outlet, is electrically connected with the control unit, and is used for monitoring an outflow signal of the fluid at the fluid outlet, converting the outflow signal into a feedback signal and then sending the feedback signal to the control unit;
the control unit is used for monitoring the running state of the electromagnetic valve according to the control signal and the feedback signal;
wherein the control signal comprises a first pulse signal comprising a first pulse up signal, a first pulse down signal, and a first pulse duration defined by the first pulse up signal and the first pulse down signal;
the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; the first pulse rising signals correspond to the second pulse rising signals one to one, the first pulse falling signals correspond to the second pulse falling signals one to one, and the first pulse duration time corresponds to the second pulse duration time one to one;
the control unit is specifically configured to monitor an operating state of the solenoid valve according to the first pulse rising signal and the second pulse rising signal corresponding to the first pulse rising signal, or the control unit is configured to monitor an operating state of the solenoid valve according to the first pulse falling signal and the second pulse falling signal corresponding to the first pulse falling signal, or the control unit is configured to monitor an operating state of the solenoid valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration.
2. The system for monitoring the operation of the solenoid valve according to claim 1, further comprising an alarm unit connected to the control unit;
the control unit is also used for sending an alarm signal to the alarm unit when judging that the electromagnetic valve operates abnormally according to the control signal and the feedback signal;
the alarm unit is used for receiving the alarm signal and giving an alarm according to the alarm signal.
3. The system for monitoring the operation of a solenoid valve according to claim 1, wherein the feedback monitoring unit comprises an air pressure sensor.
4. The system for monitoring the operation of a solenoid valve according to claim 1, wherein the feedback monitoring unit comprises a hydraulic pressure sensor.
5. An operation monitoring method of a solenoid valve applied to an operation monitoring system of the solenoid valve according to any one of claims 1 to 4, comprising: a control signal provided to the fluid inlet control switch to cause the fluid inlet control switch to control the fluid inlet switch in accordance with the control signal;
receiving a feedback signal provided by the feedback monitoring unit;
monitoring the running state of the electromagnetic valve according to the control signal and the feedback signal;
wherein the control signal comprises a first pulse signal comprising a first pulse up signal, a first pulse down signal, and a first pulse duration defined by the first pulse up signal and the first pulse down signal;
the feedback signal comprises a second pulse signal comprising a second pulse up signal, a second pulse down signal, and a second pulse duration defined by the second pulse up signal and the second pulse down signal; the first pulse rising signals correspond to the second pulse rising signals one to one, the first pulse falling signals correspond to the second pulse falling signals one to one, and the first pulse duration time corresponds to the second pulse duration time one to one;
monitoring the operating state of the solenoid valve according to the control signal and the feedback signal, including:
monitoring the running state of the electromagnetic valve according to the first pulse rising signal and the second pulse rising signal corresponding to the first pulse rising signal;
or monitoring the running state of the electromagnetic valve according to the first pulse falling signal and the second pulse falling signal corresponding to the first pulse falling signal;
or monitoring the running state of the electromagnetic valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration.
6. The solenoid valve operation monitoring method according to claim 5, wherein monitoring the operation state of the solenoid valve based on the first pulse up signal and the second pulse up signal corresponding to the first pulse up signal includes:
when the difference value between the trigger time of the first pulse rising signal and the trigger time of the second pulse rising signal corresponding to the first pulse rising signal is smaller than a set threshold value, judging that the electromagnetic valve normally operates;
when the difference value between the trigger time of the first pulse rising signal and the trigger time of the second pulse rising signal corresponding to the first pulse rising signal is larger than or equal to the set threshold value, judging that the electromagnetic valve is abnormal in operation;
monitoring the operation state of the solenoid valve according to the first pulse falling signal and the second pulse falling signal corresponding to the first pulse falling signal, including:
when the difference value between the trigger time of the first pulse falling signal and the trigger time of the second pulse falling signal corresponding to the first pulse falling signal is smaller than the set threshold value, judging that the electromagnetic valve operates normally;
when the difference value between the trigger time of the first pulse falling signal and the trigger time of the second pulse falling signal corresponding to the first pulse falling signal is larger than or equal to the set threshold value, judging that the electromagnetic valve is abnormal in operation;
monitoring an operating state of the solenoid valve according to the first pulse duration and the second pulse duration corresponding to the first pulse duration, including:
when the difference value between the first pulse duration and the second pulse duration corresponding to the first pulse duration is smaller than the set threshold value, judging that the electromagnetic valve normally operates;
and when the difference value between the first pulse duration and the second pulse duration corresponding to the first pulse duration is greater than or equal to the set threshold value, judging that the electromagnetic valve is abnormally operated.
7. The solenoid valve operation monitoring method according to claim 5, wherein the solenoid valve operation monitoring system further comprises an alarm unit, the alarm unit being connected to the control unit;
after monitoring the operating state of the solenoid valve according to the control signal and the feedback signal, the method further comprises the following steps:
and when the operation of the electromagnetic valve is judged to be abnormal, an alarm signal is sent to the alarm unit.
8. An automated sorting facility comprising a solenoid valve operation monitoring system according to any one of claims 1 to 4.
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