CN103033215A - Engineering machinery hydraulic system medium pollution diagnostic method based on digital signal processor (DSP) - Google Patents
Engineering machinery hydraulic system medium pollution diagnostic method based on digital signal processor (DSP) Download PDFInfo
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- CN103033215A CN103033215A CN2011102912060A CN201110291206A CN103033215A CN 103033215 A CN103033215 A CN 103033215A CN 2011102912060 A CN2011102912060 A CN 2011102912060A CN 201110291206 A CN201110291206 A CN 201110291206A CN 103033215 A CN103033215 A CN 103033215A
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Abstract
The invention relates to an engineering machinery hydraulic system medium pollution diagnostic method based on a digital signal processor (DSP). The diagnostic method is mainly achieved by three main systems including an information obtaining system, a data processing system and a man-machine interaction display system, wherein the information obtaining system mainly comprises a sensor for obtaining various medium oil parameters, the data processing system is mainly composed of an analog-digital (A/D) converter and a DSP signal processor, and the man-machine interaction display system mainly comprises a parameter state module, a diagnosis result module and a data storage and transport module. The diagnostic method uses the DSP to detect the medium pollution in a hydraulic system, further conducts diagnosis on hydraulic faults and is rapid, reliable, economical and simple.
Description
Technical field
The invention belongs to the fault detection technique field of construction machinery hydraulic system, relate to a kind of medium pollution inline diagnosis method based on DSP.
Background technology
Significant technological improvement along with the hydraulic system hardware device, the fault detection and diagnosis that current hydraulic system is brought detects maintenance and sample detecting as master's stage with processing but mainly also to rest on take traditional experience, although some modern diagnosis technology and artificial intelligence diagnosis's method (see Jiang Wei for details, high Cen and paper: the Hydraulic system fault diagnosis technologies summary) such as expert system, neural network, fault tree analysis etc. have had deeper development and application, but these fault diagnosis systems still can not satisfy convenience on application to engineering practice, operability, practicality, the objective requirements such as real-time.These diagnostic techniquess still rest on model detection and the simulating developer aspect to a great extent, and involve great expense, popularity rate is low, can not satisfy the actual real-time diagnosis monitoring of engineering and the requirement of processing, has serious hysteresis quality, this has reduced production efficiency to a certain extent, and what more need one were carried is to analyze at home still Xianyu's application of running status grade of diagnosticum pressing system by the hydraulic medium state parameter.
The pollution that the reason 70% that hydraulic system fault produces is derived from hydraulic oil causes, and therefore online detection diagnosis and the treatment technology for hydraulic oil just had very strong Practical meaning.Because present domestic forward position hydraulic fault diagnostic techniques concentrates on hydraulic pump, on the Study on Fault of motor and cylinder body, seldom there is pair hydraulic system's media to pollute and carries out deep in detail research.Based on this, a kind of research and development of the medium pollution in-circuit diagnostic system based on DSP have just had very strong theory significance and construction value.
Summary of the invention
Purpose of the present invention: design a kind of the detection based on DSP and cause that by medium pollution the method for hydraulic system fault realizes the research of construction machinery hydraulic system failure mechanism.
For achieving the above object, technical scheme of the present invention is: a kind of method that is caused hydraulic system fault by medium pollution that detects based on DSP is provided.It thes contents are as follows:
The first step, based on the construction machinery hydraulic system medium pollution inline diagnosis method of DSP, whole diagnostic system comprises Information Acquisition System, data handling system, man-machine interaction display interface.Wherein Information Acquisition System directly is connected with hydraulic medium by various sensors, will try to achieve physical parameter thereby obtain; Data handling system mainly is responsible for the physical parameter that transmission comes is passed through amplifying circuit, the technology such as filtering and signal conversion form simulating signal, simulating signal changes into digital signal by the A/D analog to digital conversion through simulating signal, passes through (digital signal processing) dsp processor again and passes through the CAN bus transfer to man-machine interactive system.
Second step, digital signal processor (DSP) adopts Facing Digital, the TMS320C24C54x chip of motion control.
In the 3rd step, various highly sensitive sensors comprise that temperature sensor changes to detect oil liquid temperature; Viscosity transducer is to detect the coefficient of viscosity of fluid; Density sensor is to detect the fluid variable density; Flow sensor is to detect the fluid flow of each oil inlet and outlet.
In the 4th step, hydraulic circuit system adopts even distribution type sensor setting, and the sensor of each settlement all is to adopt the integrated package system to simplify the system wiring mode.
The present invention has following beneficial effect:
Employing realizes conversion speed, precision based on the digital signal processor of DSP advanced level satisfies the engineering actual demand.
Choose the uniform hydraulic circuit of highly sensitive temperature sensor, viscosity transducer, density sensor and flow sensor and guaranteed extraction to the indispensable parameter of fluid medium, having guaranteed can Comprehensive and effectively hydraulic medium is carried out qualitative analysis, has improved detection diagnostic accuracy and confidence level.
The present invention mainly is the off-line analysis method of having broken the traditional sucrose diagnosis, and it is inconvenient that the method has obvious operation, time and effort consuming, the defective such as diagnostic accuracy is low, real-time is not strong; And adopt the on-line real time monitoring diagnostic method to realize the man-machine interaction of fault preventing ahead of time the collapse of hydraulic system, and equipment itself has still all been reduced danger coefficient to the operator, be worthy to be popularized.
Description of drawings
Concrete structure of the present invention is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the block diagram of medium pollution in-circuit diagnostic system;
Fig. 2 is hydraulic circuit sensing station arrangenent diagram;
Fig. 3 is fault diagnostic analysis figure.
Embodiment
Below in conjunction with accompanying drawing a kind of medium pollution diagnostic method based on DSP is explained in detail explanation.
As shown in Figure 1, the present invention is based on the hydraulic system's media of DSP and pollutes the inline diagnosis method, and whole diagnostic system comprises Information Acquisition System, data handling system, man-machine interaction display interface.Wherein Information Acquisition System directly is connected with hydraulic medium by various sensors, will try to achieve physical parameter thereby obtain; Data handling system mainly is responsible for the physical parameter that transmission comes is passed through amplifying circuit, the technology such as filtering and signal conversion form simulating signal, simulating signal changes into digital signal by the A/D analog to digital conversion through simulating signal, passes through digital signal processor (DSP) again and passes through the CAN bus transfer to man-machine interactive system.
Digital signal processor (DSP) adopts Facing Digital, the TMS320C24C54x chip of motion control.Because this chip fast operation, operational precision is high, and cost is honest and clean in the engineering practice, therefore be able to widespread use.
Various highly sensitive sensors comprise that temperature sensor changes to detect oil liquid temperature; Viscosity transducer is to detect the coefficient of viscosity of fluid; Density sensor is to detect the fluid variable density; Flow sensor is to detect the fluid flow of each oil inlet and outlet.This Four types sensor employing integrated structure is combined same position is carried out quadrinomial parameter concurrent testing and detection.
One embodiment of the present of invention such as Fig. 2 show, uniform sensor integrated package on hydraulic circuit 1,2,3,4 position, consider based on following purpose: 1, guarantee that the each several part hydraulic medium in whole loop can both be subject to induction and the monitoring of sensor, more comprehensive to guarantee detection, thereby can effectively analyze the data that detect, and compare with theoretical data, to find the current character state of hydraulic medium, whether further conclude the stability of hydraulic system; 2, position 1 is just being located between hydraulic pump and the reversal valve, and actuating medium is the oil inlet and outlet of pump by the first outpost of the tax office, and this is to gather the various parameters of fluid to analyze the duty that more trends towards detecting the diagnosticum press pump; 3, in like manner position 2 between valve and cylinder body, thereby can be by the runnability of data co-located 1 place's Data Comparison analysis directions valve of detecting; 4, position 3 co-located 2 are relative, and two groups of data have very strong contrast, thus cylinder body duty as can be known; 5, position 4 is oil returning tubes, and fluid has passed through whole hydraulic system by sensor integrated package 4 backflow fuel tanks, and these one group of data that is integrated package 4 detects have comprehensive to whole system.Analyze as can be known thus, the integrated package distributing position is appropriately reasonable.
Accompanying drawing 3 is depicted as hydraulic fault diagnostic analysis figure, mainly is to draw diagnostic result by measured value and standard value contrast.Four groups of detected values that A, B, C, four groups of sensors of D produce will carry out the mathematical statistics analysis with standard value; the regulation correlative value produces the risk factor grade when surpassing theoretical security interval; system will automatically produce and report to the police with alert or auto stop with the protection plant equipment, can restart work after Awaiting Overhaul is complete.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvement and replenish, these improvement and replenish and also should be considered as protection domain of the present utility model.
Claims (4)
1. construction machinery hydraulic system medium pollution inline diagnosis method based on DSP, it is characterized in that: whole diagnostic system comprises Information Acquisition System, data handling system, man-machine interaction display interface.Wherein Information Acquisition System directly is connected with hydraulic medium by various sensors, will try to achieve physical parameter thereby obtain; Data handling system mainly is responsible for the physical parameter that transmission comes is passed through amplifying circuit, the technology such as filtering and signal conversion form simulating signal, simulating signal changes into digital signal by the A/D analog to digital conversion through simulating signal, passes through (digital signal processing) dsp processor again and passes through the CAN bus transfer to man-machine interactive system.
2. a kind of construction machinery hydraulic system medium pollution inline diagnosis method based on DSP according to claim 1 is characterized in that: digital signal processor (DSP) employing Facing Digital, the TMS320C24C54x chip of motion control.
3. a kind of construction machinery hydraulic system medium pollution diagnostic method based on DSP according to claim 1 is characterized in that: various highly sensitive sensors comprise that temperature sensor changes to detect oil liquid temperature; Viscosity transducer is to detect the coefficient of viscosity of fluid; Density sensor is to detect the fluid variable density; Flow sensor is to detect the fluid flow of each oil inlet and outlet.
4. a kind of construction machinery hydraulic system medium pollution inline diagnosis method based on DSP according to claim 1, it is characterized in that: hydraulic circuit system adopts even distribution type sensor setting, and the sensor of each settlement all is to adopt the integrated package system to simplify the system wiring mode.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103541947A (en) * | 2013-09-30 | 2014-01-29 | 陈咸均 | Device for detecting and treating mine machine hydraulic oil pollution |
| CN105805086A (en) * | 2016-05-06 | 2016-07-27 | 北京航空航天大学 | Fault diagnosis method of hydraulic actuator based on multiple models |
| CN106151169A (en) * | 2015-04-01 | 2016-11-23 | 徐工集团工程机械股份有限公司 | A kind of oil product detection devices and methods therefor |
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| CN101581295A (en) * | 2009-06-22 | 2009-11-18 | 北京航空航天大学 | Airborne hydraulic pump source fault diagnosis system based on DSP |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541947A (en) * | 2013-09-30 | 2014-01-29 | 陈咸均 | Device for detecting and treating mine machine hydraulic oil pollution |
| CN106151169A (en) * | 2015-04-01 | 2016-11-23 | 徐工集团工程机械股份有限公司 | A kind of oil product detection devices and methods therefor |
| CN106151169B (en) * | 2015-04-01 | 2018-07-17 | 徐工集团工程机械股份有限公司 | A kind of oil product detection device and its method |
| CN105805086A (en) * | 2016-05-06 | 2016-07-27 | 北京航空航天大学 | Fault diagnosis method of hydraulic actuator based on multiple models |
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Application publication date: 20130410 |