CN112983932A - Hydraulic test bed equipment and data acquisition system, measurement and control system and measurement and control method thereof - Google Patents
Hydraulic test bed equipment and data acquisition system, measurement and control system and measurement and control method thereof Download PDFInfo
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- CN112983932A CN112983932A CN202110196816.6A CN202110196816A CN112983932A CN 112983932 A CN112983932 A CN 112983932A CN 202110196816 A CN202110196816 A CN 202110196816A CN 112983932 A CN112983932 A CN 112983932A
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- 238000005259 measurement Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002955 isolation Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000004590 computer program Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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Abstract
The invention discloses a hydraulic test bed device, a hydraulic test bed measurement and control system method and a hydraulic test bed data acquisition system. The hydraulic test bed measurement and control system can monitor the running states of software and hardware of the upper computer and the lower computer all the time, and once a fault occurs, the equipment can be safely shut down and protected according to a preset program, so that the problem of potential safety hazards caused by downtime can be solved.
Description
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a hydraulic test bed device, a hydraulic test bed measurement and control system method and a hydraulic test bed data acquisition system.
Background
Elements such as a hydraulic pump, a motor, a valve and the like are used as important components of modern engineering machinery and agricultural machinery, and the product performance, the service life and the reliability of the elements are always tested and verified accurately and in detail on a hydraulic test bed. The measurement and control system is used as a key core technology of the hydraulic test bed, and has very important guiding significance for testing performance, service life and reliability indexes of elements such as a hydraulic pump, a motor, a valve and the like.
In the prior art, a test bed control system for elements such as a hydraulic pump, a motor and a valve basically adopts an upper computer and a lower computer or only the upper computer or only the lower computer, however, the problem of downtime of a controller or software of the upper computer or the lower computer is easily caused by adopting the three modes, so that control failure of each part such as a motor of the test bed is caused, great potential safety hazards exist, and great damage risks are caused to tested hydraulic elements.
Therefore, how to avoid potential safety hazards caused by the problem that a traditional test bed control system is prone to being down is a technical problem which needs to be solved by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a hydraulic test bed device, a hydraulic test bed measurement and control system method and a hydraulic test bed data acquisition system, which can monitor the running state of the system in real time, and can safely shut down a protection device according to a preset program once a fault occurs, thereby solving the problem of potential safety hazard caused by breakdown.
In order to achieve the purpose, the invention provides a hydraulic test bed measurement and control system which comprises an upper computer, a lower computer, a safety delay relay and an output control circuit, wherein the upper computer is in communication connection with the lower computer, a digital output port of the lower computer is connected with an input end of the safety delay relay, and an output end of the safety delay relay is connected with the output control circuit.
Optionally, the upper computer is connected with the lower computer through a bus.
Optionally, the lower computer is specifically a PLC.
The invention also provides a measurement and control method of the hydraulic test bed, which comprises the following steps:
sending a pulse signal to a lower computer periodically by the upper computer, wherein the sending period is T;
receiving the pulse signal sent by the upper computer through the lower computer, and setting the period as T1Wherein T is1>T；
Running the control program of the lower computer and starting timing, wherein the timing time is T2Wherein T is2≤T1；
At T2Internally judging whether the lower computer receives a pulse signal sent by the upper computer;
if yes, continuing to run the control program of the lower computer, and timing time T2Setting zero;
if not, the control program of the lower computer is stopped running.
Optionally, the method further comprises:
the lower computer periodically sends a pulse signal to the safety delay relay, and the sending period is T3；
Receiving the pulse signal sent by the lower computer through the input end of the safety delay relay, wherein the delay time of the safety delay relay is set to be T4And T is4>T3；
At T4Judging whether the safety delay relay receives a pulse signal sent by the lower computer within time;
if so, the safety delay relay continues to operate;
if not, the output end of the safety delay relay is disconnected.
The invention also provides a data acquisition system of the hydraulic test bed, which comprises a sensor electrically connected with the upper computer and the lower computer, wherein the sensor is connected with the lower computer through an isolation module, one path of signal detected by the sensor is transmitted to the lower computer through the isolation module, and the other path of signal is transmitted to the upper computer.
The invention also provides a hydraulic test bed device which comprises the hydraulic test bed measurement and control system and the hydraulic test bed data acquisition system.
Compared with the background art, the hydraulic test provided by the embodiment of the inventionThe station measurement and control system comprises an upper computer, a lower computer, a safety delay relay and an output control circuit, wherein the upper computer is in communication connection with the lower computer, a digital output port of the lower computer is connected with an input end of the safety delay relay, and an output end of the safety delay relay is connected with the output control circuit. Meanwhile, the embodiment of the invention also provides a measurement and control method of the hydraulic test bed, which comprises the steps of periodically sending a pulse signal to a lower computer through an upper computer, wherein the sending period is T; receiving the pulse signal sent by the upper computer through the lower computer, and setting the period as T1Wherein T is1>T; running the control program of the lower computer and starting timing, wherein the timing time is T2Wherein T is2≤T1(ii) a At T2Internally judging whether the lower computer receives a pulse signal sent by the upper computer; if yes, continuing to run the control program of the lower computer, and timing time T2Setting zero; if not, the control program of the lower computer is stopped running.
That is, the upper computer sends a pulse signal to the lower computer every interval time T, the lower computer program logic is set to run the lower computer program and start to time after receiving the pulse signal, if the time T is timed2When the pulse signal is received again, the lower computer program continues to run, if the timing time T is up2When the pulse signal is not received again, the lower computer program stops operating. Therefore, compared with the prior art, the upper computer and the lower computer provided by the embodiment of the invention are connected through communication, the lower computer continuously monitors the pulse signals sent by the upper computer, the running states of software and hardware of the upper computer can be monitored all the time, and once a fault occurs, the equipment can be safely shut down and protected according to the preset program, so that the problem of potential safety hazards caused by shutdown can be solved.
In addition, because the sensor data of the test bed in the prior art basically adopts a single data acquisition mode of an upper computer or an upper computer, when the data of the lower computer is acquired, because the lower computer is usually a PLC or other micro controllers, the data acquisition frequency is low, when the data of the upper computer is acquired, an isolation module is usually added for shielding interference signals, the data frequency of the sensor signals is also reduced behind the isolation module, and the data acquisition modes are easy to cause data distortion during the high dynamic process test of the hydraulic element and can not meet the test requirement. The embodiment of the invention also provides a data acquisition system of the hydraulic test bed, which comprises a sensor electrically connected with the upper computer and the lower computer, wherein the sensor is connected with the lower computer through an isolation module, one path of signal detected by the sensor is transmitted to the lower computer through the isolation module, and the other path of signal is transmitted to the upper computer. Therefore, the device can be stably and reliably controlled, and the high-speed data acquisition requirement required by the test can be realized, namely the test requirement is met by two parallel signal acquisition circuits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of a connection structure between a data acquisition system of a hydraulic test bed and a measurement and control system of the hydraulic test bed provided by an embodiment of the invention;
fig. 2 is a flowchart of a logical control method for an upper computer and a lower computer in a measurement and control method for a hydraulic test bed according to an embodiment of the present invention;
fig. 3 is a flowchart of a logic control method of a lower computer and a safety delay relay in the measurement and control method of the hydraulic test bed provided by the embodiment of the invention.
Wherein:
110-an upper computer, 120-a bus, 130-a lower computer, 150-a safety delay relay, 160-an output control circuit, 170-a sensor and 180-an isolation module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
The core of the invention is to provide a hydraulic test bed device, a hydraulic test bed measurement and control system method and a hydraulic test bed data acquisition system, which can monitor the running state of the system in real time, and can safely shut down the protection device according to a preset program once a fault occurs, thereby solving the problem of potential safety hazard caused by downtime.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a block diagram of a connection structure between a data acquisition system of a hydraulic test bed and a measurement and control system of the hydraulic test bed according to an embodiment of the present invention; fig. 2 is a flowchart of a logical control method for an upper computer and a lower computer in a measurement and control method for a hydraulic test bed according to an embodiment of the present invention; fig. 3 is a flowchart of a logic control method of a lower computer and a safety delay relay in the measurement and control method of the hydraulic test bed provided by the embodiment of the invention.
The measurement and control system of the hydraulic test bed provided by the embodiment of the invention comprises an upper computer 110, a lower computer 130, a safety delay relay 150 and an output control circuit 160, wherein the upper computer 110 is in communication connection with the lower computer 130, a digital output port of the lower computer 130 is connected with an input end of the safety delay relay 150, and an output end of the safety delay relay 150 is connected with the output control circuit 160.
The hydraulic test bed measurement and control system can continuously monitor the running states of the upper computer 110 and the lower computer 130, and once a fault occurs, the device can be safely shut down and protected according to a preset program, so that the problem of potential safety hazards caused by downtime can be solved.
Of course, according to actual needs, the upper computer 110 and the lower computer 130 may be connected through the bus 120, and the lower computer 130 may be set as a PLC or other microcontroller. The PLC may be configured to receive the pulse signal from the upper computer 110, and execute a preset program after receiving the pulse signal, where the preset program may control the corresponding hydraulic element to be turned on or off.
Meanwhile, the embodiment of the invention also provides a measurement and control method of the hydraulic test bed, which comprises the following steps:
s1: the pulse signals are periodically sent to the lower computer 130 through the upper computer 110, and the sending period is T;
s2: receiving the pulse signal sent by the upper computer 110 through the lower computer 130, and setting the period as T1Wherein T is1>T；
S3: running the control program of the lower computer 130 and starting timing, wherein the timing time is T2Wherein T is2≤T1；
S4: at T2Internally judging whether the lower computer 130 receives a pulse signal sent by the upper computer 110;
if yes, the control program of the lower computer 130 is continuously operated, and the time T is timed2Setting zero;
if not, the control program of the lower computer 130 is stopped.
That is, the upper computer 110 sends a pulse signal to the lower computer 130 at intervals of T, the program logic of the lower computer 130 is set to run the program of the lower computer 130 and start timing after receiving the pulse signal, and the timing time is T2If the time T is timed2When the pulse signal is received again, the lower computer 130 program continues to run, if the time T is counted2If the pulse signal is not received again, the lower computer 130 program stops running.
Therefore, compared with the prior art, the upper computer 110 and the lower computer 130 provided by the embodiment of the invention are in communication connection, the lower computer 130 continuously monitors the pulse signals sent by the upper computer 110, the running states of software and hardware of the upper computer 110 can be continuously monitored, once the upper computer 110 fails, the device can be safely shut down and protected according to the preset program, and therefore the problem of potential safety hazards caused by downtime can be solved.
On the basis, the measurement and control method of the hydraulic test bed further comprises the following steps:
s101: the lower computer 130 periodically sends a pulse signal to the safety delay relay 150, and the sending period is T3；
S102: the pulse signal sent by the lower computer 130 is received through the input end of the safety delay relay 150, and the delay time of the safety delay relay 150 is set to be T4And T is4>T3；
S103: at T4Within the time, whether the safety delay relay 150 receives a pulse signal sent by the lower computer 130 is judged;
if yes, the safety delay relay 150 continues to operate;
if not, the output end of the safety delay relay 150 is disconnected.
Specifically, on the basis that the lower computer 130 is connected with the upper computer 110 through the bus 120, one digital output port of the lower computer 130 is connected with the input end of the safety delay relay 150, and the output end of the safety delay relay 150 can be connected with a power supply loop of the output control circuit 160 or a logic control circuit of a core component such as a test bed motor. The safety delay relay 150 sets a delay time T4, and the slave computer 130 periodically transmits a pulse signal to a digital output port connected to an input terminal of the safety delay relay 150, where the transmission period is T3.
Therefore, when the lower computer 130 starts to operate, the program of the lower computer 130 periodically sends a pulse signal to the input end of the safety delay relay 150, and the sending period is T3; the delay time of the safety delay relay 150 is set to be T4, and T4> T3; in the time of T4, if the safety delay relay 150 receives the pulse signal sent by the lower computer 130, the safety delay relay 150 continues to work, and the equipment normally operates; in the time of T4, if the safety delay relay 150 does not receive the pulse signal sent by the lower computer 130, the safety delay relay 150 judges that the lower computer 130 has a fault, the output of the safety delay relay 150 is interrupted, and the equipment is shut down.
That is, the safety delay relay 150 can continuously monitor the operating state of the lower computer 130, and once a fault occurs, the safety delay relay 150 can interrupt all control output power supplies to stop the equipment, thereby protecting the safety of the equipment and the hydraulic elements.
In addition, because the sensor 170 data of the test bed in the prior art basically adopts a single data acquisition mode of the upper computer 110 or the upper computer 110, when the lower computer 130 is used for data acquisition, because the lower computer 130 is usually a PLC or other microcontroller, the data acquisition frequency is low, when the upper computer 110 is used for data acquisition, the isolation module 180 is usually added for shielding interference signals, and the data frequency of the sensor 170 signals is also reduced after the isolation module 180, the data acquisition mode of the type easily causes data distortion during the high dynamic process test of the hydraulic element, and the test requirement cannot be met. In order to meet the data acquisition requirement, the embodiment of the invention also provides a data acquisition system of the hydraulic test bed.
The data acquisition system of the hydraulic test bed comprises a sensor 170 electrically connected with an upper computer 110 and a lower computer 130, wherein the sensor 170 is connected with the lower computer 130 through an isolation module 180, one path of signal detected by the sensor 170 is transmitted to the lower computer 130 through the isolation module 180, and the other path of signal is transmitted to the upper computer 110. In other words, the original data signal of the sensor 170 is divided into two paths, one path of signal is sent to the isolation module 180 and then is accessed to the lower computer 130 for logic control, the other path of signal is directly sent to the data acquisition card of the upper computer 110 without any isolation, and the interference noise in the signal and the like are processed in a software filtering mode, so that clean high-speed acquisition data are finally obtained. Therefore, the device can be stably and reliably controlled, and the high-speed data acquisition requirement required by the test can be realized, namely the test requirement is met by two parallel signal acquisition circuits.
The hydraulic test bed equipment provided by the invention comprises the hydraulic test bed measurement and control system and the hydraulic test bed data acquisition system described in the specific embodiment; other parts of the hydraulic test stand apparatus can be referred to the prior art and are not expanded herein.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The hydraulic test bed equipment, the hydraulic test bed measurement and control system method and the hydraulic test bed data acquisition system provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are provided only to help understand the concepts of the present invention and the core concepts thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a hydraulic test platform system of observing and controling, its characterized in that, includes host computer (110), next machine (130), safe time delay relay (150) and output control circuit (160), host computer (110) with next machine (130) are connected through the communication, the digital output port of next machine (130) with the input of safe time delay relay (150) is connected, the output of safe time delay relay (150) with output control circuit (160) are connected.
2. The hydraulic test bed measurement and control system according to claim 1, wherein the upper computer (110) and the lower computer (130) are connected through a bus (120).
3. The hydraulic test bed measurement and control system according to claim 2, wherein the lower computer (130) is specifically a PLC.
4. A measurement and control method for a hydraulic test bed is characterized by comprising the following steps:
the pulse signals are periodically sent to the lower computer (130) through the upper computer (110), and the sending period is T;
receiving the pulse signal sent by the upper computer (110) through the lower computer (130), and setting the period to be T1Wherein T is1>T；
Operation stationThe control program of the lower computer (130) starts to time for T2Wherein T is2≤T1；
At T2Internally judging whether the lower computer (130) receives a pulse signal sent by the upper computer (110) or not;
if yes, continuing to run the control program of the lower computer (130), and timing time T2Setting zero;
if not, the control program of the lower computer (130) is stopped to run.
5. The hydraulic test stand measurement and control method of claim 4, further comprising:
the lower computer (130) periodically sends pulse signals to the safety delay relay (150) with the sending period of T3；
Receiving a pulse signal sent by the lower computer (130) through the input end of the safety delay relay (150), wherein the delay time of the safety delay relay (150) is set to be T4And T is4>T3；
At T4Within the time, judging whether the safety delay relay (150) receives a pulse signal sent by the lower computer (130);
if yes, the safety delay relay (150) continues to operate;
if not, the output end of the safety delay relay (150) is disconnected.
6. The utility model provides a hydraulic test bench data acquisition system, characterized in that, including be used for with sensor (170) that host computer (110) and next computer (130) electricity are connected, just sensor (170) are connected through isolation module (180) with next computer (130), the signal process of the same way that sensor (170) detected isolation module (180) transmit to next computer (130), another way signal transmission to host computer (110).
7. A hydraulic test stand apparatus comprising a hydraulic test stand measurement and control system according to any one of claims 1 to 3 and a hydraulic test stand data acquisition system according to claim 6.
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| CN202110196816.6A CN112983932B (en) | 2021-02-22 | 2021-02-22 | Hydraulic test bed equipment and data acquisition system, measurement and control system and measurement and control method thereof |
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Address after: No. 29 Caohu Avenue, Caohu Street, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Liyuan Hydraulic Co.,Ltd. Address before: No.29 Caohu Avenue, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: LIYUAN HYDRAULIC (SUZHOU) Co.,Ltd. |