CN107588935B - Leaf spring fatigue test system - Google Patents
Leaf spring fatigue test system Download PDFInfo
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- CN107588935B CN107588935B CN201710722923.1A CN201710722923A CN107588935B CN 107588935 B CN107588935 B CN 107588935B CN 201710722923 A CN201710722923 A CN 201710722923A CN 107588935 B CN107588935 B CN 107588935B
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Abstract
The invention discloses a steel plate spring fatigue testing system which comprises a detection testing machine, wherein the detection testing machine is controlled by a PLC (programmable logic controller) control system, and the PLC control system is electrically connected with a force measuring sensor, a pressure transmitter, an HMI (human machine interface), a counting parameter setting module and a force measuring parameter setting module. The counting parameter setting module and the force measuring parameter setting module are set through an HMI (human machine interface), and the PLC control system is electrically connected with a real-time data display module, an alarm module and a switch control module and displays real-time parameters through the HMI. According to the invention, corresponding counting parameters and force measurement parameters are set through the HMI, and a pressure signal detected by the force measurement sensor is compared with a set value, so that the effect of monitoring a force value in real time can be achieved, the force value can be automatically counted, when the real-time test force value is smaller than the set value, the force value is determined to be a broken spring, and the PLC control system controls the alarm module to give an alarm and automatically stop the machine through the switch control module.
Description
Technical Field
The invention relates to the technical field of steel plate spring test detection, in particular to a steel plate spring fatigue test system.
Background
The fatigue life is used as a key index of the automobile leaf spring, the original testing machine is mechanical, only the vibration stroke can be set, if the testing machine is broken, the machine cannot be automatically shut down, and even the testing machine cannot be tested according to the specified load. These problems affect the accuracy of the test results. And has certain potential safety hazard. And moreover, the test indexes cannot be set, and the test machine is automatically shut down after the test is finished.
Disclosure of Invention
In view of the above-mentioned shortcomings, the present invention provides a fatigue testing system for leaf springs.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the utility model provides a leaf spring fatigue test system, includes the testing machine that detects, this testing machine passes through PLC control system control, PLC control system electric connection has force cell sensor, pressure transmitter, HMI human-computer interface, count parameter setting module and dynamometry parameter setting module. The counting parameter setting module and the force measuring parameter setting module are set through an HMI (human machine interface), and the PLC control system is electrically connected with a real-time data display module, an alarm module and a switch control module and displays real-time parameters through the HMI.
Preferably, the real-time data display module comprises a counting number value, a current force value, a rotating speed value and an experiment time value.
Preferably, the counting parameter setting module comprises an experiment time setting module, an overrun time display module and a timing module.
Preferably, the force measurement parameter setting module comprises an equipment state adjusting module, a zero offset value setting module, a force measurement sensor measuring range setting module, a force measurement correction coefficient setting module, a measurement frequency setting module and a broken spring low value setting module.
Preferably, the force measuring sensor is connected with a pressure transmitter, the force measuring sensor converts a detected pressure signal into a millivolt signal through the pressure transmitter, and the pressure transmitter feeds the millivolt signal back to the PLC control system, converts the millivolt signal into a digital signal through the PLC control system, and displays real-time parameters through the HMI human-computer interface.
Preferably, the force measuring sensor converts the detected pressure signal into a 0-10V signal through a pressure transmitter, and the PLC control system converts the 0-10V signal into a digital signal and displays real-time parameters through an HMI (human machine interface).
The invention has the beneficial effects that:
the invention sets corresponding counting parameters and force measurement parameters through the HMI human-computer interface, converts pressure signals detected by the force measurement sensor into millivolt signals through the pressure transmitter, feeds the millivolt signals back to the PLC control system, converts the millivolt signals into digital signals through the PLC control system, displays real-time parameters through the HMI human-computer interface and compares the real-time parameters with the set values, can achieve the effect of monitoring force values in real time, can automatically count, and is judged to be a broken spring when the real-time test force value is less than the set values, and the PLC control system controls the alarm module to give out an alarm and automatically stops through the switch control module.
The invention is further described with reference to the following figures and examples.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a frame of a leaf spring fatigue testing system according to the present invention.
The reference numerals in the drawings are explained below.
The system comprises a detection testing machine-1, a PLC control system-2, a force measuring sensor-3, a pressure transmitter-4, an HMI human-computer interface-5, a counting parameter setting module-6, an experiment frequency setting module-6 a, an overrun frequency display module-6 b, a timing module-6 c, a force measuring parameter setting module-7, an equipment state adjusting module-7 a, a zero offset value setting module-7 b, a force measuring sensor range setting module-7 c, a force measuring correction coefficient setting module-7 d, a measurement frequency setting module-7 e, a broken spring low value setting module-7 f, a real-time data display module-8, an alarm module-9 and a switch control module-10.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, a steel plate spring fatigue testing system includes a testing machine 1, the testing machine 1 is controlled by a PLC control system 2, and the PLC control system 2 is electrically connected to a force sensor 3, a pressure transmitter 4, an HMI human-machine interface 5, a counting parameter setting module 6, and a force measurement parameter setting module 7. The counting parameter setting module 6 and the force measurement parameter setting module 7 are set through the HMI human-machine interface 5, the PLC control system 2 is electrically connected with a real-time data display module 8, an alarm module 9 and a switch control module 10, and real-time parameters are displayed through the HMI human-machine interface 5. According to the invention, corresponding test parameters are set through the HMI 5, and the value monitored by the force sensor 3 is compared with a set value, so that the effect of monitoring the force value in real time can be achieved, the force value can be automatically counted, when the real-time test force value is smaller than the set value, the force value is determined to be a broken spring, and the PLC control system 2 controls the alarm module 9 to give an alarm and automatically stops the machine through the switch control module 10.
Specifically, the real-time data display module 8 comprises a counting number value, a current force value, a rotating speed value and an experiment time value, and the method can compare the value and the set value displayed in real time by the real-time data display module 8 to judge whether the steel plate spring is qualified.
Further, the counting parameter setting module 6 comprises an experiment frequency setting module 6a, an overrun frequency display module 6b and a timing module 6c, wherein the experiment frequency setting module 6a can be used for setting the test frequency to ensure the accuracy of the fatigue test; the overrun frequency display module 6b is used for warning that the test frequency reaches the set frequency, and if the overrun frequency occurs, the test is stopped immediately; the timing module 6c is used for displaying the total time of the current experiment.
Specifically, the force measurement parameter setting module 7 includes an equipment state adjusting module 7a, a zero offset value setting module 7b, a force measurement sensor range setting module 7c, a force measurement correction coefficient setting module 7d, a measurement frequency setting module 7e, and a broken spring low value setting module 7 f. The device state adjusting module 7a is used for adjusting the working condition of the device before testing, and the device state adjusting module 7a displays two states of a PLC module OK or a PLC module abnormity and two states of a force transducer normal state and a force transducer abnormity state through the HMI human-machine interface 5; the zero offset value setting module 7b is used for adjusting the value of the force measuring sensor 3 to be 0 when the load is no-load; the load cell range setting module 7c is used for setting the measurement range of the load cell 3; the broken spring low value setting module 7f is used for judging whether the steel plate spring is broken, when the real-time testing force value is smaller than a set value, the steel plate spring is broken, the PLC control system 2 controls the alarm module 9 to give an alarm and automatically stops the machine through the switch control module 10.
The force measuring sensor 3 is connected with the pressure transmitter 4, the force measuring sensor 3 converts detected pressure signals into millivolt signals through the pressure transmitter 4, the pressure transmitter 4 feeds the millivolt signals back to the PLC control system 2, converts the millivolt signals into digital signals through the PLC control system 2, and displays real-time parameters through the HMI human-machine interface 5.
In the embodiment, the force measuring sensor 3 converts a detected pressure signal into a 0-10V signal through the pressure transmitter 4, and the PLC control system 2 converts the 0-10V signal into a digital signal and displays real-time parameters through the HMI (human machine interface) 5.
When the invention works: firstly, starting a detection testing machine 1, starting a system to operate, setting counting parameters and force measurement parameters through an HMI (human machine interface) 5, and then starting a test; and then, converting the measured real-time pressure change data into millivolt signals through a pressure transmitter 4 by a force measuring sensor 3, converting the millivolt signals into digital signals through a PLC (programmable logic controller) control system 2, displaying the digital signals on an HMI (human machine interface) 5, comparing the actually measured force value with a set value by the PLC control system 2, determining the force value as a broken spring when the real-time measured force value is smaller than the set value, and controlling an alarm module 9 to give an alarm and automatically stopping the machine through a switch control module 10 by the PLC control system 2.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. In addition, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation, the use of the term being generic or similar to other means being encompassed by the invention.
Claims (4)
1. A leaf spring fatigue test system which characterized in that: the device comprises a detection testing machine (1), wherein the detection testing machine (1) is controlled by a PLC control system (2), the PLC control system (2) is electrically connected with a force measuring sensor (3), a pressure transmitter (4), an HMI (human machine interface) 5, a counting parameter setting module (6) and a force measuring parameter setting module (7), the force measuring sensor (3) is connected with the pressure transmitter (4), the force measuring sensor (3) converts a detected pressure signal into a millivolt signal through the pressure transmitter (4), the pressure transmitter (4) feeds the millivolt signal back to the PLC control system (2) and converts the millivolt signal into a digital signal through the PLC control system (2), the real-time parameter is displayed through the HMI (5), and the counting parameter setting module (6) and the force measuring parameter setting module (7) are set through the HMI (5), the force measurement parameter setting module (7) comprises an equipment state adjusting module (7a), a zero offset value setting module (7b), a force measurement sensor measuring range setting module (7c), a force measurement correction coefficient setting module (7d), a measurement frequency setting module (7e) and a broken spring low value setting module (7f), wherein the equipment state adjusting module (7a) is used for testing the working condition of the equipment before adjustment, and the equipment state adjusting module (7a) displays two states of a PLC module OK or a PLC module abnormity and two states of a force measurement sensor normality and a force measurement sensor abnormity through an HMI (human machine interface) 5; the zero offset value setting module (7b) is used for adjusting the value of the force measuring sensor (3) to be 0 when the load is no-load; the force measuring sensor range setting module (7c) is used for setting the measuring range of the force measuring sensor (3); the broken spring low value setting module (7f) is used for judging whether the steel plate spring is broken, when the real-time test force value is smaller than a set value, the steel plate spring is broken, the PLC control system (2) controls the alarm module (9) to give an alarm and automatically stops through the switch control module (10);
the PLC control system (2) is electrically connected with a real-time data display module (8), an alarm module (9) and a switch control module (10), and displays real-time parameters through an HMI (human machine interface) 5;
when in work: firstly, starting a detection testing machine (1), starting a system to operate, setting counting parameters and force measurement parameters through an HMI (human machine interface) 5, and then starting a test; and then, converting the measured real-time pressure change data into millivolt signals through a pressure transmitter (4) by a force measuring sensor 3, converting the millivolt signals into digital signals through a PLC (programmable logic controller) control system (2), displaying the digital signals on an HMI (human machine interface) 5, comparing the measured force value with a set value by the PLC control system (2), determining the force value as a broken spring when the real-time measured force value is smaller than the set value, and controlling an alarm module (9) to give an alarm by the PLC control system (2) and automatically stopping the machine through a switch control module (10).
2. The leaf spring fatigue testing system of claim 1, wherein: the real-time data display module (8) comprises a counting numerical value, a current force value, a rotating speed value and an experiment time value.
3. The leaf spring fatigue testing system of claim 1, wherein: the counting parameter setting module (6) comprises an experiment frequency setting module (6a), an overrun frequency display module (6b) and a timing module (6 c).
4. The leaf spring fatigue testing system of claim 1, wherein: the force measuring sensor (3) converts a detected pressure signal into a 0-10V signal through the pressure transmitter (4), and the PLC control system (2) converts the 0-10V signal into a digital signal and displays real-time parameters through the HMI human-machine interface (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710722923.1A CN107588935B (en) | 2017-08-22 | 2017-08-22 | Leaf spring fatigue test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710722923.1A CN107588935B (en) | 2017-08-22 | 2017-08-22 | Leaf spring fatigue test system |
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| CN107588935A CN107588935A (en) | 2018-01-16 |
| CN107588935B true CN107588935B (en) | 2020-04-03 |
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| CN201710722923.1A Active CN107588935B (en) | 2017-08-22 | 2017-08-22 | Leaf spring fatigue test system |
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| CN111006958A (en) * | 2019-12-12 | 2020-04-14 | 苏州苏试试验集团股份有限公司 | Control device and control method of crash bench test bench |
| CN116022871B (en) * | 2023-02-21 | 2024-04-12 | 昆明理工大学 | Water purification treatment cascade feedback PLC automatic control system and control method thereof |
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| CN105466703A (en) * | 2015-11-30 | 2016-04-06 | 重庆红岩方大汽车悬架有限公司 | Leaf spring assembly fatigue test bench |
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| CN2864653Y (en) * | 2005-04-22 | 2007-01-31 | 上海市建筑科学研究院有限公司 | Multifunctional new type experiment table for detecting fatigne performance of building door and window |
| WO2014152117A1 (en) * | 2013-03-14 | 2014-09-25 | Fisher Controls International Llc | Valve prognostics for polymeric components based on accelerated aging techniques |
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