CN100492415C - Diesel engine operation data recoding method - Google Patents
Diesel engine operation data recoding method Download PDFInfo
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- CN100492415C CN100492415C CNB2007100720746A CN200710072074A CN100492415C CN 100492415 C CN100492415 C CN 100492415C CN B2007100720746 A CNB2007100720746 A CN B2007100720746A CN 200710072074 A CN200710072074 A CN 200710072074A CN 100492415 C CN100492415 C CN 100492415C
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Abstract
The invention relates to a diesel engine operation data recorder and a recording method, the recorder is composed of a micro-controller, a memory, a communication circuit, a power source circuit and a clock circuit, the memory, the power source circuit and the clock circuit are connected with the micro-controller; the communication circuit includes two portions of a CAN bus communication circuit and a RS422 communication circuit, the CAN bus communication circuit is connected to a CAN interface of the micro-controller by optical isolation; the RS422 serial port communication circuit is connected to a serial port of the micro-controller by optical isolation; the power source circuit is composed of DCDC modules. The invention is used for storing and reading work parameters and fault information during an operation process of a diesel engine, providing reliable base for analysing the operation performance of the diesel engine, and the invention is characterised by performing classified storage according to important extent and variety speed of operation data of the diesel engine.
Description
(1) technical field
The present invention relates to diesel engine data recording field, be specifically related to a kind of registering instrument and recording method of writing down diesel engine work state and service data.
(2) technical background
Diesel engine structure more complicated in order to guarantee safety, operation efficiently, need be monitored the duty of diesel engine, and show by instrument, and for operator's field observation or time recording s main working parameters, after the outage, data are lost naturally.If will watch the working condition before the diesel engine, can only with the written record foundation.When diesel engine broke down, a lot of following duration of situation were shorter, and parameter changes very fast, often has little time to carry out written record, and this is just for judging that accurately the diesel engine fault occurrence cause brings certain difficulty.In addition, because the diesel engine moving component is more, its rate of breakdown is higher, for example lubricating oil pressure is low, actuator failures etc., the fault that diesel engine takes place has reflected its duty, if the failure message that is taken place in the diesel engine operational process can be noted, will use, maintain for diesel engine and maintenance provides reliable basis.
The diesel engine supervisory system of using mostly provides on-line monitoring, analysis and Presentation Function at present, and after the outage, data can not be preserved.As being ZL02278136.6 at number of patent application, name is called in the utility model patent of " diesel engine main shaft Working Status Monitoring registering instrument " and discloses a kind of data monitoring registering instrument, by the returning-oil temperature of sensor measurement diesel engine main bearing, realize monitoring and demonstration to temperature.Document " diesel engine of locomotive working state monitoring record diagnosis device " provides a kind of diesel engine work state has been carried out the comprehensive monitoring system of on-line monitoring, analysis and fault diagnosis, and structure is complicated.These devices all can not be preserved data after outage.In addition, the researchist has also recognized the necessity of preserving the diesel engine service data gradually, has added some and have the data memory module of power-down protection when design diesel engine supervisory system.Be equipped with data memory module in the diesel engine electronic supervisory system of producing as German MTU company, be used for writing down the main service data of shutting down preceding two hours diesel engines.But this module data reads the specialized equipment that needs to connect other, uses inconvenient.
(3) summary of the invention
The purpose of this invention is to provide a kind of can write down shut down or power down for the previous period in the service data of diesel engine, the diesel engine service data registering instrument of foundation is provided for diesel engine performance evaluation and fault analysis.But particularly relate to a kind of instrument and data record method that writes down diesel engine work state and long preservation data.
Datalogger product of the present invention is to be become by microcontroller, storer, communicating circuit, power circuit and clock circuit bank, and wherein storer adopts and has the eeprom chip that power down keeps function, and the data line of storer, control line link to each other with microcontroller; Communicating circuit comprises CAN bus communication circuit and RS422 communicating circuit two parts, and CAN bus communication controller is isolated by the light idol and linked to each other with the CAN interface of microcontroller; The RS422 serial communication circuit is isolated by the light idol and is linked to each other with the serial ports of microcontroller; Clock circuit is by powered battery, and crystal oscillator is 32KHz; Power circuit is made up of two DCDC modules ,+24 commentaries on classics+5V ,+5V commentaries on classics+5V, two kinds of isolation+the 5V power supply is respectively hardware system isolates preceding power supply and isolates the back power supply; Communicating circuit and power circuit are provided with external interface.Wherein storer adopts power down to keep chip, after the outage, can keep canned data for a long time; Communication module provides CAN bus and two kinds of interface modes of RS422, conveniently is connected with external communication interface, realizes data transmission; Clock circuit provides current time information, distinguishes the diesel engine fault information of different time sections according to this time.
Recording method of the present invention is:
System initialization;
Communicating circuit receives new data, and the data that the microcontroller verification receives judge whether checking data is correct;
If checking data correctly then the further judgment data purposes of microcontroller, the return command communicating circuit receives data again if checking data is incorrect;
During the further judgment data purposes of microcontroller at first judgment data whether be to read information command, if then microcontroller order communicating circuit sends data outside system, loop ends is also returned, communicating circuit receives data again; If not read information command then the further judgment data of microcontroller whether be running parameter information;
If data are running parameter information then microcontroller carries out variable assignments, loop ends to diesel engine work parameter.Loop ends and returning behind the variable assignments; If data are not running parameter information then whether the further judgment data of microcontroller is failure message;
If data be failure message then the microcontroller output command is with the information write-in memory appropriate address, loop ends is also returned, communicating circuit receives data again; If data are not the then loop ends and returning of fault information, communicating circuit receives data again.
The running parameter of real time record diesel engine of the present invention and failure message, and carry out record according to the characteristics of diesel engine service data, the physical record method is realized that by software its process flow diagram is as shown in Figure 3.
The data of diesel engine service data registering instrument record are divided into two kinds of the running parameter of diesel engine and diesel engine fault information.Because the parameter of reflection diesel engine work state is more, for example temperature, pressure, rotating speed and fuel delivery etc. if store all parameters according to the same time interval, must occupy very big storage space, and the time period of storage data is reduced.In fact, the Changing Pattern of different parameters, significance level are different, and for example rotating speed, tooth bar position, actual DBR etc. have reflected the main working performance of diesel engine, and change very fast; And relative variations such as single cylinder row temperature, lubricating oil pressure, cooling water temperature are slower.For record more data information in finite storage space, the present invention is divided into three classes: data type I, data type II, data type III according to the significance level and the variation speed of diesel engine work parameter with all data, and is as shown in table 1.Every kind of data type is provided with different storage times at interval, carries out classification and storage, rationally arranges storage space, makes and preserves more significant data in the storer.With data of 16 binary representations, for every kind of data among the data type I, memory gap is 200ms, preserves 2 hours required storage spaces so and is: 1000/200 * 3600 * 2 ÷, 1024 ≈ 36K.During registering instrument work, every kind of data type is recorded in the fixed address scope in the storer as one group.During reading of data, distinguish different running parameters according to memory address.
Table 1 diesel engine work parametric classification
| Data qualification | Degree | Memory gap | Memory allocation | Address realm | Data type | Time |
| Data type I | Important | 200ms | 108k | 00800000H～ 0080FFFFH 01000000H～ 0100AFFFH | Engine speed, actual DBR, tooth bar position | 2 hours |
| Data type II | Generally | 2000ms | 8k | 0100B000H～ 0100CFFFH | Lubricating oil pressure, cooling water pressure, seawater pressure, fuel pressure, supercharging atmospheric pressure, starting air pressure, oil temperature, cooling water temperature, ocean temperature etc. | 2 hours |
| Data type III | Motor-driven | Motor-driven | 2k | 0100D000H～ 0100D7FFH | Motor-driven |
In addition, the complex structure of diesel engine, the probability that breaks down in operational process is very high, and the fault that diesel engine took place also is one of information of reflection diesel engine work state.Therefore, except the running parameter of diesel engine, diesel engine service data registering instrument also writes down the failure message that is taken place in the diesel engine operational process, comprises time of failure and failure code.Wherein time of failure takies 3 bytes, and failure code takies 1 byte, and every fault takies 4 bytes, and its memory address is 0100D000H～0100FFFFH, takies the 10K storage space altogether, can 5000 failure messages of cycle index.
The instrument external interface comprises communication bus and power supply among the present invention.Communication modes has two kinds: CAN bus and RS422 communication interface; External power source interface :+24V and+5V.During instrument work, select wherein a kind of communication modes and external power source to insert as required and get final product.
The present invention can be installed in the diesel engine supervising device, and power supply is provided by supervising device, and external communication interface links to each other with the communication interface of diesel engine supervising device.
During the storage data, the diesel engine monitoring system is sent to the every diesel engine work parameter and the failure message of its measurement in the diesel engine service data registering instrument by communication interface, microcontroller is stored in the corresponding position of storer through handling respectively with running parameter and failure message.
During reading of data, communication interface is linked to each other with outer computer, send the reading of data request, after the system verification information, the diesel engine service data that is stored in the storer is sent to external unit to system.
(4) description of drawings
Fig. 1 is diesel engine datalogger hardware circuit principle figure of the present invention;
Fig. 2 is a diesel engine datalogger hardware circuit connection layout of the present invention;
Fig. 3-Fig. 5 is a diesel engine datalogger software flow pattern of the present invention.
(5) embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
In conjunction with Fig. 1, the system hardware circuit of present embodiment is become by microprocessor, memory circuit, communicating circuit, power circuit and clock circuit bank.The wherein microprocessor control that realizes the system data storage and function such as read can be adopted 16 above singlechip chips of band serial ports and CAN bus communication interface, as ARM family chip LPC2214, and POWERPC series MPC566 etc.; Storer is realized the task of record data, can adopt eeprom chip, and as AT28C1024, its memory capacity is 64K * 16, and this chip-stored and reading of data are all more convenient, under powering-off state, can keep canned data for a long time; Communicating circuit comprises two kinds of CAN bus communication and RS422 communication interfaces, and communication interface all passes through photoelectricity isolates and link to each other with peripheral hardware CAN controller or RS422 controller, CAN controller PCA82C250 for example, RS422 controller SP490; The crystal oscillator of clock circuit is 32KHz, and power supply is provided by battery; 5V power supply and isolation back 5V power supply before power circuit obtains isolating by the DCDC modular converter.
In conjunction with Fig. 2, microcontroller is example with MPC566, two chip selection signal CS2 of this chip link to each other with the sheet choosing end of two storeies respectively with CS23, realization is to the differentiation of two storage addresss, storer 1 address realm: 00800000H～0080FFFFH, storer 2 address realms: 01000000H～0100FFFFH.Storer is 16 storages, and the data line D0～D15 of microcontroller and address wire A15～A30 link to each other with address wire with the data of storer respectively.For the CAN bus communication, the A_RNT of CAN interface links to each other with the A_CNT pin in two connections of isolating through photoelectricity and the microcontroller; The RS422 serial communication, then isolation links to each other with receiving end RXD with the serial ports transmitting terminal TXD1 of microcontroller through photoelectricity; In clock circuit, be clock power RTC power supply, microcontroller XTAL32, EXTAL32 two termination 32KHz crystal oscillators by battery.
In conjunction with Fig. 3-Fig. 5, software flow pattern comprises main program flow and timer interrupt program flow process two parts.Master routine is realized the initialization of system configuration, the data that verification receives, and the judgment data purposes, according to program circuit, the processing of classifying.In timer interrupt program, for the data that belong to data type I, every 200ms storage once; For the data that belong to data type II, every 2000ms storage once; For the data that belong to data type III, time interval storage data on demand.
Claims (4)
1. diesel engine service data recording method is characterized in that:
System initialization;
Communicating circuit receives new data, and the data that the microcontroller verification receives judge whether checking data is correct;
If checking data correctly then the further judgment data purposes of microcontroller, the return command communicating circuit receives data again if checking data is incorrect;
During the further judgment data purposes of microcontroller at first judgment data whether be to read information command, if then microcontroller order communicating circuit sends data outside system, loop ends is also returned, communicating circuit receives data again; If not read information command then the further judgment data of microcontroller whether be running parameter information;
If data are running parameter information then microcontroller carries out variable assignments to diesel engine work parameter, loop ends and returning behind the variable assignments; If data are not running parameter information then whether the further judgment data of microcontroller is failure message;
If data be failure message then the microcontroller output command is with the information write-in memory appropriate address, loop ends is also returned, communicating circuit receives data again; If data are not the then loop ends and returning of fault information, communicating circuit receives data again.
2. a kind of diesel engine service data according to claim 1 recording method, it is characterized in that described running parameter is divided into three classes: data type I, data type II, data type III according to the significance level and the variation speed of diesel engine work parameter, every kind of data type is provided with different storage times at interval during the write store appropriate address, carries out classification and storage.
3. a kind of diesel engine service data according to claim 2 recording method, it is characterized in that described classification and storage undertaken by the timer interrupt operation, concrete steps are: in timer interrupt program, for the data of data type I, every 200ms storage once; For the data that belong to data type II, every 2000ms storage once; For the data that belong to data type III, time interval storage data on demand.
4. a kind of diesel engine service data according to claim 1 recording method is characterized in that described failure message, comprises time of failure and failure code; Wherein time of failure takies 3 bytes, and failure code takies 1 byte, and every fault takies 4 bytes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100720746A CN100492415C (en) | 2007-04-20 | 2007-04-20 | Diesel engine operation data recoding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100720746A CN100492415C (en) | 2007-04-20 | 2007-04-20 | Diesel engine operation data recoding method |
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| CN101038681A CN101038681A (en) | 2007-09-19 |
| CN100492415C true CN100492415C (en) | 2009-05-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102467432A (en) * | 2010-11-04 | 2012-05-23 | 周琳 | Method for realizing monitoring of communication special service terminal equipment by adopting serial communication |
| CN103334826A (en) * | 2013-06-27 | 2013-10-02 | 南车四方车辆有限公司 | Diesel engine water temperature recording device of diesel locomotive and diesel locomotive |
| CN108733412B (en) * | 2017-04-19 | 2021-06-11 | 上海寒武纪信息科技有限公司 | Arithmetic device and method |
| CN109121435A (en) | 2017-04-19 | 2019-01-01 | 上海寒武纪信息科技有限公司 | Processing unit and processing method |
| CN117933327A (en) | 2017-04-21 | 2024-04-26 | 上海寒武纪信息科技有限公司 | Processing device, processing method, chip and electronic device |
| CN109213027B (en) * | 2018-07-16 | 2021-07-16 | 哈尔滨工程大学 | Speed regulation unit of marine low-speed common rail diesel engine based on mu/COS-II real-time operation system |
| CN112362323B (en) * | 2020-10-27 | 2022-09-09 | 华能国际电力股份有限公司 | Data storage method of vibration online monitoring and fault diagnosis system of steam turbine generator unit |
| CN114973452B (en) * | 2022-05-11 | 2024-10-01 | 北京麦克沃根科技有限公司 | Recording board for recording data of armored vehicle-mounted launch control equipment |
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Owner name: HARBIN CHINA CONTROL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HARBIN ENGINEERING UNIVERSITY Effective date: 20121022 |
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Effective date of registration: 20121022 Address after: Room 452, electronic world, 258 Nantong Avenue, Nangang District, Heilongjiang, Harbin 150001, China Patentee after: Harbin Ship Control Technology Co., Ltd. Address before: 150001, building 145, No. 1, Nantong Avenue, Nangang District, Heilongjiang, Harbin Patentee before: Harbin Engineering Univ. |
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