CN101334329A - Marine vehicle diesel indicating diagram test system - Google Patents
Marine vehicle diesel indicating diagram test system Download PDFInfo
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- CN101334329A CN101334329A CNA2008100486279A CN200810048627A CN101334329A CN 101334329 A CN101334329 A CN 101334329A CN A2008100486279 A CNA2008100486279 A CN A2008100486279A CN 200810048627 A CN200810048627 A CN 200810048627A CN 101334329 A CN101334329 A CN 101334329A
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Abstract
The invention relates to a test system for an indicating diagram of a vessel diesel engine, which consists of a cylinder pressure sensor, an photoelectric encoder, a signal conditioning module, a portable controller and a computer internally provided with a test analysis software, wherein, the cylinder pressure sensor arranged on the indicating valve channel of the diesel engine is connected with the input end of the portable controller by a data line; the photoelectric encoder is arranged at the free end of the diesel engine, as for the diesel engine that can not be provided with the photoelectric encoder, two magnetoelectric tachometric transducers are respectively used for measuring a top dead center and a crank angle signal; the photoelectric encoder or the magnetoelectric tachometric transducers is connected with the input end of the portable controller by the data line by passing through the signal conditioning module; the portable controller is internally provided with a flash memory used for storing indicating diagram data; the test analysis software derives the data from the flash memory or derives metrical data by the data line for analysis. The test system of the invention has the advantages of convenient data collection, flexible data transmission, manpower saving and accurate computation of instruction parameters, etc.
Description
Technical field
The present invention relates to boat diesel engine, particularly a kind of marine vehicle diesel indicating diagram test system.
Background technology
Diesel indicating diagram is containing the abundant information relevant with diesel engine performance, be that the Marine Engine Engineering technician carries out one of most important means of diesel engine performance monitoring and diagnosis, boat diesel engine is provided with the cylinder pressure measurement passage, makes the measurement of load-position diagram and the monitoring of the interior duty of cylinder become possibility.Boat diesel engine is mainly measured maximum outbreak pressure at present, and this can not reflect the course of work in the cylinder fully, is difficult to analyze the cylinder internal state.
Existing marine vehicle diesel indicating diagram test system or test controller need link to each other with the computing machine that test analysis software is installed by serial ports and just can test, and data storage is dumb, the test process inconvenience; Finish by high-speed data acquisition, the composition complexity of test macro, the system cost height, redundant data storage is big.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of simple in structure, etc. the marine vehicle diesel indicating diagram test system of crank angle sampling and the convenient storage of test data, to overcome the problem that prior art exists.
The present invention solves the technical scheme that its technical matters adopts: be made up of cylinder pressure sensors, photoelectric encoder, signal condition module, portable controller and the computing machine that is built-in with test analysis software, wherein: be contained in the cylinder pressure sensors on the indicator valve passage of diesel engine, it links to each other with the input end of portable controller by data line; Photoelectric encoder is installed in the diesel engine free end, for the diesel engine that photoelectric encoder can't be installed, then measures top dead centre and corner signal respectively with two magnetoelectric tachometric transducers; Photoelectric encoder or magnetoelectric tachometric transducer link to each other with the input end of portable controller through the signal condition module by data line; Portable controller is built-in with the flash memory that is used for store test data.
The present invention compared with prior art mainly contains following advantage:
1. image data is convenient: adopt Single-chip Controlling, down trigger by top dead centre signal and corner signal waits the crank angle sampling to the diesel engine cylinder pressure, the data of gathering both can be stored in the local flash memory of acquisition controller according to user's setting-up time length, acquisition controller does not need to link to each other with computing machine during measurement, measures after finishing the copying data in the local flash memory of acquisition controller in the computing machine that test analysis software is installed.Test macro leaves serial line interface, also can send test data by serial ports during test.
2. save artificial: test process only needs 1 people to finish.
3. it is average that the read test data are carried out quasi-periodicity, calculates each cylinder indication parameter, duty in the monitoring cylinder of diesel engine, and test analysis software has the top dead centre debugging functions simultaneously, thus it is accurate to guarantee that indication parameter calculates.
Description of drawings
Fig. 1 is the synoptic diagram that test macro of the present invention is formed.
Fig. 2 is the composition synoptic diagram of portable controller among Fig. 1.
Fig. 3 is the workflow diagram of portable controller shown in Figure 2.
Fig. 4 is the process flow diagram of test analysis of the present invention.
Fig. 5 is a test macro operating process synoptic diagram of the present invention.
Embodiment
The present invention relates to boat diesel engine, it adopts crank angle collections such as monolithic processor controlled cylinder pressure, test data acquiescence mode is kept in the local flash memory, by each main indication parameter of test analysis computed in software boat diesel engine, and the measurement mechanism of monitoring cylinder internal state.
The present invention is a kind of marine vehicle diesel indicating diagram test system, is made up of cylinder pressure sensors, photoelectric encoder, signal condition module, portable controller and the computing machine that is built-in with test analysis software.As shown in Figure 1: cylinder pressure sensors is used to measure cylinder pressure, and it is contained on the indicator valve passage of boat diesel engine (abbreviation diesel engine), and links to each other with the input end of portable controller by data line.Photoelectric encoder is used to measure top dead centre signal and corner signal, is installed in the diesel engine free end; For the diesel engine that photoelectric encoder can't be installed, then can use two magnetoelectric tachometric transducers to measure top dead centre and corner signal respectively at the flywheel end.Photoelectric encoder or magnetoelectric tachometric transducer link to each other with the input end of portable controller through the signal condition module by data line, and the signal condition module is isolated and level conversion the output signal of photoelectric encoder or magnetoelectric tachometric transducer.The crank angle that waits of portable controller control cylinder pressure is sampled, and test data acquiescence mode is kept in the local flash memory of portable controller, and portable controller also leaves output terminal and links to each other with computing machine by data line; Test analysis software is analyzed from the flash memory derived data or by data line derivation measurement data; The air cylinder signal of computing machine equity crank angle is analyzed and is calculated, and obtains load-position diagram and main indication performance index.Among Fig. 1, symbol " ... " expression computing machine, magnetoelectric tachometric transducer are optional.
Described cylinder pressure sensors can adopt voltage-type piezoelectric type cylinder pressure sensors, and this sensor output signal is input to portable controller after the signal condition module transforms.Described photoelectric encoder adopts incremental optical-electricity encoder, and it is a kind of common sensor, and is the same with voltage-type piezoelectricity cylinder pressure sensors; The top dead centre and the corner signal of this photoelectric encoder output also are input to portable controller through the TTL signal that the signal condition module is converted into standard; Portable controller carries out the A/D sampling according to the triggering of top dead centre and corner signal to cylinder pressure signal, and sampling number determines automatically that according to the periodicity that the user sets sampled data is stored in the local flash memory, also can select to send by serial ports.Computing machine then obtains data by offline mode from local flash memory, perhaps obtains etc. the cylinder pressure data of crank angle by serial communication, draws load-position diagram then, and calculates each cylinder indication parameter of diesel engine, to estimate each cylinder working state.
The structure of described signal condition module is: being provided with the signal transformation that magnetoelectric sensor is produced is the zero passage voltage comparer of square-wave signal, and the photoisolator of the square-wave signal after the conversion being isolated and produced the TTL control signal of standard.The zero passage voltage comparer is directly to link to each other with photoisolator.The model of zero passage voltage comparer is zero passage voltage comparable chip LM393.The model of photoisolator is high speed optoelectronic isolating chip 6N137.
Described portable controller can adopt the C8051F series monolithic, and for example adopting model is C8051F120 high-speed microprocessor (abbreviation single-chip microcomputer), and is controller with described single-chip microcomputer, and pressure signal is waited the crank angle collection.Described portable controller, its form and with the annexation of peripheral circuit as shown in Figure 2: the external 122*32 dot matrix lcd module of single-chip microcomputer, carry out the internal memory expansion by static data memory I DT71V124 chip, test data is carried out flash data storage or serial communication (the acquiescence mode is a flash memory) by TTL RS 232 level transferring chip MAX232, passes through I
2C bus interface keyboard and LED driven management device ZLG7290 chip connect 3 * 4 keyboards.Signal from photoelectric encoder or magnetoelectric tachometric transducer output, two interruptive ports that top dead centre after zero passage voltage comparable chip LM393 conditioning and high speed optoelectronic isolating chip 6N137 isolation and corner signal are linked into single-chip microcomputer are converted to digital signal from the cylinder pressure signal of pressure transducer output after conditioning by the inner A/D converter of single-chip microcomputer.
The workflow of above-mentioned portable controller is as shown in Figure 3: when starting working, the number of stroke of boat diesel engine is set earlier and sets storage (transmission) periodicity, software is according to counting that number of stroke determines that every circulation should sample, and determines to store the cycle index of (transmission) according to storage (transmissions) periodicity at every turn.After importing the cylinder number of current measurement cylinder, judge the interruption of top dead centre, trigger then and judge that crank angle interrupts, have no progeny in the crank angle cylinder pressure is carried out a data acquisition, 1 all after dates are finished in the pending data collection, data by serial ports with data storage (acquiescence mode) or send on local flash memory by serial ports, be on zero the basis at initial storage (transmission) number of times, storage (transmission) number of times increases 1, judge whether to finish storage (transmission) number of times of setting, if do not finish, the interrupt step that then repeats to top dead centre is until the storage of finishing setting (transmission) number of times, after finishing the test of all cylinders, this portable controller power cut-off.
Described computing machine, the flow process of the test analysis software that it is built-in is as shown in Figure 4: import data (acquiescence mode) after the end of test (EOT) from the local flash memory of portable controller, if in test process, data directly send in the calculating by serial communication, then directly directly import data from the Computer Storage catalogue.The data of obtaining are exactly to wait the sampled signal of crank angle cylinder pressure data, if test is the pure compression process, program adopts the pure compression collimation method that top dead centre is revised, and correction result is saved in the diesel engine database that software carries, from the diesel engine database, read the basic fundamental parameter of test diesel engine then, press signal to carry out phase shift in all cylinders successively according to firing order, determine each cylinder ignition top dead centre, make the ignition top dead centre be positioned at the round-robin center, draw each cylinder load-position diagram and calculate indication parameter in conjunction with the structure of diesel engine, as indicated pressure, explosion pressure, the explosion pressure phase place, indicated work, parameter such as the compression pressure and the swelling pressure, result of calculation is saved in the database, each cylinder indication parameter comparative analysis is carried out in the mode of chart and is shown, test result is finally with the output print of word form.
Above-mentioned marine vehicle diesel indicating diagram test system provided by the invention, tool adopts the method (referring to Fig. 5) that may further comprise the steps to the test of boat diesel engine performance:
(1) sensor installation, stube cable, energising back portable controller carries out System self-test;
(2) after self check is passed through, in portable controller, determine the parameter setting of diesel engine, as the umber of pulse weekly of number of stroke, crank angle and the periodicity of data preservation;
(3) open cylinder indicator valve passage, portable controller interrupts cylinder pressure is waited the signals collecting of crank angle according to top dead centre and crank-angle pulse;
(4) in data acquisition, make the formula controller of taking enter test result and show, show that the maximal value of current cylinder pressure is judged the validity of test data to help the user;
(5) confirm that test data effectively after, wait the pressure signal of crank angle sampling to be kept in the flash memory of portable controller locality or and send by serial communication;
(6) after storage or transmission finished, (3) carried out the test of next cylinder set by step, until the test of finishing all cylinders;
(7) after the test of all cylinders is finished, carry out computational analysis to data; Before the data analysis, the basic structure and the technical data of tested diesel engine need be arranged in the diesel engine database storing;
(8) the cylinder pressure data of crank angle sampling such as read, carry out the calculating of load-position diagram and each indication parameter, so far end of test (EOT) in conjunction with the basic structure and the technical data of diesel engine;
(9) test result is exported with printing type, perhaps is kept in the database.
Above-mentioned marine vehicle diesel indicating diagram test system provided by the invention, it is used for the test of boat diesel engine performance.
Claims (10)
1. marine vehicle diesel indicating diagram test system, it is characterized in that forming by cylinder pressure sensors, photoelectric encoder, signal condition module, portable controller and the computing machine that is built-in with test analysis software, wherein: be contained in the cylinder pressure sensors on the indicator valve passage of diesel engine, it links to each other with the input end of portable controller by data line; Photoelectric encoder is installed in the diesel engine free end, for the diesel engine that photoelectric encoder can't be installed, then measures top dead centre and corner signal respectively with two magnetoelectric tachometric transducers; Photoelectric encoder or magnetoelectric tachometric transducer link to each other with the input end of portable controller through the signal condition module by data line; Portable controller is built-in with the flash memory that is used for store test data.
2. marine vehicle diesel indicating diagram test system according to claim 1 is characterized in that described cylinder pressure sensors adopts voltage-type piezoelectric type cylinder pressure sensors.
3. marine vehicle diesel indicating diagram test system according to claim 1 is characterized in that described photoelectric encoder adopts incremental optical-electricity encoder.
4. marine vehicle diesel indicating diagram test system according to claim 1, it is characterized in that it is the zero passage voltage comparer of square-wave signal that described signal condition module is provided with the signal transformation that magnetoelectric sensor is produced, and the photoisolator of the square-wave signal after the conversion being isolated and produced the TTL signal of standard.
5. marine vehicle diesel indicating diagram test system according to claim 4, it is characterized in that adopting model is LM393 zero passage voltage comparer.
6. marine vehicle diesel indicating diagram test system according to claim 4, it is characterized in that adopting model is the 6N137 photoisolator.
7. marine vehicle diesel indicating diagram test system according to claim 1 is characterized in that described portable controller leaves and is used for the output terminal that links to each other with computing machine by data line.
8. according to claim 1 or 7 described marine vehicle diesel indicating diagram test systems, it is characterized in that it is the C8051F series monolithic that described portable controller adopts model.
9. according to the described marine vehicle diesel indicating diagram test system of arbitrary claim in the claim 1 to 8, it is characterized in that being used for the test of boat diesel engine performance.
10. one kind based on the described marine vehicle diesel indicating diagram test system of arbitrary claim in the claim 1 to 8, and the method that may further comprise the steps is adopted in the test of boat diesel engine performance:
(1) sensor installation, stube cable, energising back portable controller carries out System self-test;
(2) after self check is passed through, determine the parameter setting of diesel engine in portable controller, it comprises the umber of pulse weekly of number of stroke, crank angle and the periodicity that data are preserved;
(3) open cylinder indicator valve passage, portable controller interrupts cylinder pressure is waited the signals collecting of crank angle according to top dead centre and crank-angle pulse;
(4) in data acquisition, portable controller enters test result and shows, shows that the maximal value of current cylinder pressure is judged the validity of test data to help the user;
(5) confirm that test data effectively after, wait the pressure signal of crank angle sampling to be kept in the flash memory of portable controller locality or and send by serial communication;
(6) after storage or transmission finished, (3) carried out the test of next cylinder set by step, until the test of finishing all cylinders;
(7) after the test of all cylinders is finished, carry out computational analysis to data; Before the data analysis, the basic structure and the technical data of tested diesel engine need be arranged in the diesel engine database storing;
(8) the cylinder pressure data of crank angle sampling such as read, then carry out the calculating of load-position diagram and each indication parameter, so far end of test (EOT) in conjunction with the basic structure and the technical data of diesel engine;
(9) test result is exported with printing type, perhaps is kept in the database.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100486279A CN101334329A (en) | 2008-07-29 | 2008-07-29 | Marine vehicle diesel indicating diagram test system |
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| CNA2008100486279A CN101334329A (en) | 2008-07-29 | 2008-07-29 | Marine vehicle diesel indicating diagram test system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539064A (en) * | 2011-12-20 | 2012-07-04 | 中国北车集团大连机车车辆有限公司 | Diesel engine indicator diagram measuring method |
| CN105157914A (en) * | 2015-09-06 | 2015-12-16 | 山东大学 | System and method for conversion from time domain to angle domain of internal combustion engine internal cylinder pressure signal |
| CN105181341A (en) * | 2015-06-29 | 2015-12-23 | 山东大学 | Internal combustion engine combustion process characterization parameter test method and device |
| CN106644492A (en) * | 2016-09-30 | 2017-05-10 | 武汉理工大学 | Marine middle-and-low-speed diesel engine cylinder pressure online monitoring system based on FPGA |
| CN107631825A (en) * | 2017-10-31 | 2018-01-26 | 集美大学 | Control system and its control method based on the portable ship electronic indicators of ARM |
| CN108344578A (en) * | 2018-04-10 | 2018-07-31 | 西南石油大学 | A kind of drilling well high-power diesel engine maximum power detection method and its device |
| US10691570B1 (en) | 2019-02-19 | 2020-06-23 | Cisco Technology, Inc. | Software assistant for power-on-self-test (POST) and built-in self-test (BIST) in in-vehicle network (IVN) of connected vehicles |
| CN114459766A (en) * | 2022-01-13 | 2022-05-10 | 武汉理工大学 | Method for monitoring working state of oil head of crude oil generator set of ocean platform |
| CN115727985A (en) * | 2022-11-18 | 2023-03-03 | 大连海事大学 | Portable indicator diagram measuring device |
-
2008
- 2008-07-29 CN CNA2008100486279A patent/CN101334329A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539064A (en) * | 2011-12-20 | 2012-07-04 | 中国北车集团大连机车车辆有限公司 | Diesel engine indicator diagram measuring method |
| CN102539064B (en) * | 2011-12-20 | 2013-10-30 | 中国北车集团大连机车车辆有限公司 | Diesel engine indicator diagram measuring method |
| CN105181341B (en) * | 2015-06-29 | 2017-08-11 | 山东大学 | A kind of combustion process of the internal-combustion engine characterization parameter method of testing and device |
| CN105181341A (en) * | 2015-06-29 | 2015-12-23 | 山东大学 | Internal combustion engine combustion process characterization parameter test method and device |
| CN105157914B (en) * | 2015-09-06 | 2017-06-30 | 山东大学 | A kind of system and method in internal combustion engine cylinder pressure signal time domain gyration domain |
| CN105157914A (en) * | 2015-09-06 | 2015-12-16 | 山东大学 | System and method for conversion from time domain to angle domain of internal combustion engine internal cylinder pressure signal |
| CN106644492A (en) * | 2016-09-30 | 2017-05-10 | 武汉理工大学 | Marine middle-and-low-speed diesel engine cylinder pressure online monitoring system based on FPGA |
| CN107631825A (en) * | 2017-10-31 | 2018-01-26 | 集美大学 | Control system and its control method based on the portable ship electronic indicators of ARM |
| CN108344578A (en) * | 2018-04-10 | 2018-07-31 | 西南石油大学 | A kind of drilling well high-power diesel engine maximum power detection method and its device |
| US10691570B1 (en) | 2019-02-19 | 2020-06-23 | Cisco Technology, Inc. | Software assistant for power-on-self-test (POST) and built-in self-test (BIST) in in-vehicle network (IVN) of connected vehicles |
| CN114459766A (en) * | 2022-01-13 | 2022-05-10 | 武汉理工大学 | Method for monitoring working state of oil head of crude oil generator set of ocean platform |
| CN114459766B (en) * | 2022-01-13 | 2024-06-11 | 武汉理工大学 | Method for monitoring working state of oil head of crude oil generator set on ocean platform |
| CN115727985A (en) * | 2022-11-18 | 2023-03-03 | 大连海事大学 | Portable indicator diagram measuring device |
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