CN103606105A - Method and system for reliability check and evaluation index statistics of engineering agricultural full-set machinery product - Google Patents

Abstract

The invention relates to a method and system for reliability check and evaluation index statistics of an engineering agricultural full-set machinery product. The method comprises the following steps that: S1, random sampling is carried out on products with passed inspection from a manufacturer; S2, a plurality of interlocking keys representing working time, a fault type and work stopping in a recording device are installed near an operation handle of a prototype; S3, a corresponding key is pressed by a machinist according to the working situation of the prototype and the recording device calculates the working time, determines the fault type and carries out statistics on the number of times of the fault; and S4, the recording and a remote monitoring center carry out communication by a wireless mobile communication network so as to realize remote transmission of testing data; and S5, after the testing time ends, the detection worker calculates and evaluates check indexes like average fault time before the first-time fault and average fault interval time and the like according to data stored in the remote monitoring center. According to the invention, a testing prototype can be tracked remotely and effectively; the work intensity of the detection worker can be reduced; and consistency and accuracy of data can be improved.

Description

Engineering agricultural machinery machine product Reliability Check deliberated index statistical method and system

Technical field

The statistical method and the system that the present invention relates to a kind of product reliability examination deliberated index, application is engineering agricultural machinery complete machine.

Background technology

Engineering agricultural machinery product refers to the engineering goods for agricultural engineering operation and Agriculture Field operation, as the agricultural loader for agricultural engineering operation, agricultural grab and for the tractor of Agriculture Field operation, harvester etc.Working time refers to the working time fulfiling assignment, and comprises that engineering agricultural machinery load activity duration, headland turn time, lay time and oiling add the water time.

The reliability of engineering agricultural machinery product is the significant problem that is related to its actual operation quality, user benefit and Business survival always.According to the regulation of national standard < < engineering agricultural machinery product Reliability Check deliberated index system and failure modes general rule > >, Reliability Check index should be able to quantitatively be weighed the reliability of using under rated condition, to machine product, its suggestion adopts mean-time-to-first-failure (MTTFF) and mean time between failures (MTBF) etc., and these data are the improved important evidence of reliability assessment and product reliability.

Reliability data is generally from field reliability test at present, i.e. the actual use of combination product is carried out field reliability test under special messenger's supervision or fixed point is followed the tracks of field reliability test; Testing laboratory or testing field fail-test, be responsible for by testing crew, by fail-test standard, and the testing laboratory under controlled condition or carry out fail-test at the testing field of rated condition; User investigation investigates to obtain the reliability data of the actual use of product in the user of product.In this several method, from the data of field reliability test the most directly, the most effective, also the most reliable.But engineering agricultural machinery product is of a great variety, operating environment severe, site test condition extreme difference, and also needs to send long-term (about the 1 year) tracking test of special messenger testing staff, is almost difficult to accomplish, and is affected by human factors, and the consistance of data is poor.

Summary of the invention

(1) technical matters that will solve

The technology topic that quasi-solution of the present invention is determined is propose a kind of statistical method of Reliability Check index and design corresponding system, by wireless mobile telecommunication technology, realize the remote transmission of data, to realize the remote monitoring of performance assessment criteria, reach the object of effective long-term follow field test, for Reliability Assessment and reliability improvement provide the data of consistance and accuracy more.

(2) technical scheme

For solving the problems of the technologies described above, the present invention proposes a kind of statistical method of Reliability Check index, concrete steps comprise:

S1, the sampling of engineering agricultural machinery machine product: extract the product that experimental prototype is up to the standards from manufacturing plant's inspection department, and take random sampling, sample size to be generally 10% of annual production;

S2, have the activity duration calculate, the pen recorder of the functions such as fault category judgement and number of stoppages statistics installs: in pen recorder, have a plurality ofly to represent job state, fault category or quit work etc. to there is the button of interlock function, be arranged near operating grip, fault category at least comprises a kind of in generic failure, catastrophic failure or critical failure;

S3, the record of activity duration and the number of stoppages: operation tractor driver presses lower job state button, in pen recorder, operation clocking capability is triggered, press lower described certain fault category button, in pen recorder, add up number of stoppages function and be triggered, simultaneously because the interlocked between button is used, operation timing is suspended, press down the button that quits work, all button is upspring, and timing, tally function are suspended

S4, the remote transmission of test figure: carry out both-way communication with remote monitoring center in pen recorder, receive after the called instruction of single, upload current record data 1 time, or reception timing function instruction, timing is to uploading data at once, or first-time fault uploading data at once while triggering, test figure mainly comprises model machine No. ID, system time, accumulation activity duration, fault category and the number of stoppages, operating location longitude and latitude and operating speed;

S5, the statistics of performance assessment criteria, calculating and evaluation: after test period finishes, testing staff carries out the statistical computation of performance assessment criteria according to the data of uploading according to formula (1) and (2):

Mean-time-to-first-failure $\mathrm{MTTFF}=\frac{1}{r}(\underset{i=1}{\overset{r}{\mathrm{\&Sigma;}}}{t}_i+\underset{j=1}{\overset{n-r}{\mathrm{\&Sigma;}}}{t}_j)---\left(1\right)$

Wherein, n is by test specimen, effective number of statistics first-time fault

R is by test specimen, and the product number of first-time fault occurs

T _iaccumulated operating time while being i sample generation first-time fault, unit is hour (h)

T _jthe accumulated operating time of j sample of first-time fault does not occur while finishing for fail-test, and unit is hour (h)

Mean time between failures $\mathrm{MTBF}=\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{t}_{\mathrm{ci}}}{r_a}---\left(2\right)$

Wherein, n is by test specimen, effective number of statistics first-time fault

T _cibe the accumulated operating time of i experimental prototype, unit is hour (h)

R _afor by experimental prototype at the trial between in the summation of field failure number of times

The pen recorder of realizing in above-mentioned steps mainly comprises:

The key switch with a plurality of interlocking buttons, each button represent job state, fault category or quit work in a kind of;

GPS unit, obtains system time, operating location longitude and latitude and operating speed, to the reliability of test figure, provides a kind of foundation;

Processing unit, mainly by microprocessor or single-chip microcomputer, formed, comprise peripheral circuit, it is the core of whole pen recorder, be mainly used according to the state computation activity duration of the corresponding button of key switch, statistics fault category and the corresponding number of stoppages, also from GPS unit resolves system time, operating location longitude and latitude and operating speed;

Storage unit, is connected with processing unit, for storing accumulation activity duration, fault category and cumulative failure number of times;

Wireless communication unit, is connected with processing unit, and test figure is transferred to remote monitoring center;

Display unit, is connected with processing unit, shows test figure;

Power supply unit, gives other unit power supplies in pen recorder, is connected with the storage battery in experimental prototype simultaneously, and by storage battery, be its charging.

Remote monitoring center mainly comprises:

Wireless mobile communication devices, with the wireless communication unit group-net communication in pen recorder, carries out the remote transmission of data;

Process software in computing machine and computing machine, is connected with wireless mobile communication devices, for steering order transmission, test figure parsing, demonstration, storage and geography information monitoring etc.

(3) beneficial effect

Engineering agricultural machinery machine product Reliability Check deliberated index statistical method and the system of the present invention's design, by being placed on pen recorder in model machine, realizing activity duration calculating, fault category and the number of stoppages and add up, and utilize wireless mobile telecommunication technology to realize the remote transmission of data, by remote monitoring center, realized statistics, calculating and the evaluation of objectives of examination, remote tracing experimental prototype effectively, greatly reduce testing staff's working strength, improve the consistance of test figure; The interlocking capability of key switch in pen recorder, makes each state detecting unique, has simplified operation steps, has guaranteed the accuracy of test figure simultaneously; By GPS unit acquisition system time, operating location longitude and latitude and operating speed, the reliability of data has been done to further raising.

Accompanying drawing explanation

Fig. 1 is embodiment of the present invention engineering agricultural machinery machine product Reliability Check deliberated index statistical method process flow diagram.

Fig. 2 is recording device structure schematic diagram in engineering agricultural machinery machine product Reliability Check deliberated index statistical system.

Fig. 3 is engineering agricultural machinery machine product Reliability Check deliberated index statistical system scheme schematic diagram.

Number in the figure: 1, key switch, 101, activity duration button, 102, generic failure button, 103, catastrophic failure button, 104, critical failure button, 105, key quits work, 2, processing unit, 3,, display unit, 4, GPS unit, 401, gps antenna, 5, wireless communication unit, 501, communication antenna, 6, storage unit, 7, power supply unit

Embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.

Fig. 1 is embodiment of the present invention engineering agricultural machinery machine product Reliability Check deliberated index statistical method flow process, and whole process is as follows.

S1, random sampling the product that underproof engineering agricultural machinery complete machine is up to the standards from manufacturing plant's inspection department.

S2, the pen recorder with functions such as activity duration calculating, fault category judgement and number of stoppages statistics is installed.The structural representation of pen recorder as shown in Figure 2, mainly comprises:

The key switch 1 with a plurality of interlocking buttons, each button represents a kind of function, establishes button 101 here and represents the activity duration, and button 102 represents generic failure, and button 103 represents catastrophic failure, and button 104 represents critical failure, button 105 representatives quit work;

The core processing unit 2 of pen recorder, mainly by microprocessor or single-chip microcomputer, formed, comprise peripheral circuit, be connected with each button of described key switch 1, according to described key-press status, be used for computational tasks time, failure judgement classification and add up the corresponding number of stoppages, also from GPS unit resolves system time, operating location longitude and latitude and operating speed;

Display unit 3, the activity duration of calculating for display processing unit 2, fault category and the corresponding number of stoppages, system time, latitude and longitude coordinates and operating speed;

GPS unit 4, comprises gps antenna 401, and operating location longitude and latitude and operating speed for acquisition system time, test place, provide a kind of foundation to the reliability of test figure;

Wireless communication unit 5, comprises antenna 501, for data transmission that described processing unit 2 is integrated to remote monitoring center;

Storage unit 6, the accumulation activity duration or fault category and the cumulative failure number of times that for storing described processing unit 2, calculate;

Power supply unit 7, gives other unit power supplies in pen recorder, is connected with the storage battery in experimental prototype simultaneously, and by storage battery, be its charging;

Because key switch 1 needs manual operation, for convenience of operating handset, can place it near model machine control crank.

S3, operation tractor driver presses the button that represents corresponding function in lower pen recorder according to operation situation, and pen recorder calculates corresponding activity duration, failure judgement classification and the statistics number of stoppages automatically.

When model machine starts operation, tractor driver is when operating grip is started working in operation, and the button 101 that represents the activity duration in key switch 1 is pressed down, and the level that processing unit 2 detects the pin that is connected with button 101 changes, and just starts timing; If there is a kind of in generic failure, catastrophic failure or critical failure in operation process, operation tractor driver represents generic failure button 102, catastrophic failure button 103 or critical failure button 104 under only need pressing in the work of shutdown, because the interlocked between button is used, button 101 all can be upspring, the processing unit 2 time timing that stops operation, and the corresponding number of stoppages adds 1; When stopping operation, operation tractor driver is out-of-work that button 105 is pressed down by representing in key switch 1, and activity duration timing stops, and the accumulation activity duration that processing unit 2 calculates, fault category and the corresponding number of stoppages are placed to storage unit 6.

S4, remote monitoring center is communicated by letter by mobile radio networks with pen recorder, carries out the remote transmission of test figure.N portion pen recorder in N platform model machine and remote monitoring center form Star Network structure, as shown in Figure 3, monitoring center carries out telecommunication by portable radio device according to communications protocol and the pen recorder set, transmission data, communication modes can be single caller, during data in need to checking certain pen recorder, only need send instruction to it, pen recorder will install No. ID after receiving instruction, system time, the accumulation activity duration, fault category and the number of stoppages, operating location longitude and latitude and operating speed Fan Gei monitoring center, communication modes also pen recorder regularly upload, by monitoring center's remote setting time, in addition communication modes also first-time fault trigger uploading data, during a speciogenesis in fault category, in key switch, corresponding button is pressed down, pen recorder initiatively by data upload now to remote monitoring center.

S5, testing staff adds up, calculates and evaluate the reliability index that will examine according to the data of remote monitoring center storage.Being arranged on the data that the software in remote monitoring center Computer passes back according to wireless mobile communication devices resolves No. ID, device, system time, accumulation activity duration, fault category and the number of stoppages, operating location longitude and latitude and operating speed, show and stores, because this software has geography information monitoring modular, in software map, also show the operating location of each experimental prototype; When the test period of regulation finishes, testing staff therefrom counts effective number n of first-time fault according to the test figure of storage, the product number r of first-time fault occurs, accumulated operating time t during i sample generation first-time fault _i(h), there is not the accumulated operating time t of j sample of first-time fault in unit hour when fail-test finishes _j, according to following formula, calculate mean-time-to-first-failure:

Mean-time-to-first-failure

Testing staff also needs to add up the accumulated operating time t of i experimental prototype _ci(unit hour, h) and by experimental prototype at the trial between in the summation r of field failure number of times _a, according to following formula, calculate the mean time between failures:

Mean time between failures

Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (4)

1. an engineering agricultural machinery machine product Reliability Check deliberated index statistical method, is characterized in that, described step comprises:

In the product that S1，Cong manufacturing plant inspection department is up to the standards, randomly draw underproof engineering prototype;

S2, represents activity duration, fault category and quits work etc. to have button that interlocked uses and be arranged near operating grip by a plurality of in pen recorder, also needs described device to be connected with the storage battery in model machine, and by storage battery, be its charging; Described fault category at least comprises a kind of in generic failure, catastrophic failure or critical failure;

S3, according to the operation situation of model machine, presses lower corresponding button by operation tractor driver, pen recorder computational tasks time, Judging fault classification and the statistics number of stoppages; Press lower described job state button, in pen recorder, operation clocking capability is triggered, press lower described certain fault category button, in pen recorder, adding up number of stoppages function is triggered, due to the interlocked use between button, operation timing is suspended, and presses down the button that quits work simultaneously, all button is upspring, and timing, tally function are suspended;

S4, pen recorder is communicated by letter by mobile radio networks with remote monitoring center, realizes the remote transmission of test figure; Pen recorder receives after the called instruction of single, uploads current record data 1 time, or receives timing function instruction, and timing is to uploading data at once, or first-time fault uploading data at once while triggering; Test figure mainly comprises model machine No. ID, system time, accumulation activity duration, fault category and the number of stoppages, operating location longitude and latitude and operating speed;

S5, after test period finishes, testing staff carries out calculating and the evaluation of performance assessment criteria according to the data of monitoring center's storage; Suppose to count effective number n of first-time fault from data, the product number r of first-time fault occurs, accumulated operating time t during i sample generation first-time fault _i(h), there is not the accumulated operating time t of j sample of first-time fault in unit hour when fail-test finishes _j(unit hour, h), mean-time-to-first-failure

Testing staff also needs to add up the accumulated operating time t of i experimental prototype _ci(unit hour, h) and by experimental prototype at the trial between in the summation r of field failure number of times _a,

Mean time between failures

2. a system that realizes engineering agricultural machinery machine product Reliability Check deliberated index statistical method, is characterized in that, described system comprises pen recorder and the remote monitoring center being arranged in model machine.

3. realize the pen recorder in claim 2, it is characterized in that, described device mainly comprises:

The key switch with a plurality of interlocking buttons, described each button represent job state, fault category or quit work in a kind of;

The GPS unit that obtains system time, operating location longitude and latitude and operating speed, provides a kind of foundation to the reliability of test figure;

Processing unit, mainly by microprocessor or single-chip microcomputer, formed, comprise peripheral circuit, it is the core of whole pen recorder, be mainly used according to the state computation activity duration of corresponding button in described key switch, Judging fault classification and calculate the corresponding number of stoppages, also from latitude and longitude coordinates and the operating speed of described GPS unit resolves system time, operating location;

Storage unit, is connected with described processing unit, for storing accumulation activity duration, fault category and cumulative failure number of times;

Wireless communication unit, is connected with described processing unit, and test figure is transferred to remote monitoring center;

Display unit, is connected with described processing unit, shows test figure;

Power supply unit, other unit power supplies in pen recorder, are connected with the storage battery in experimental prototype simultaneously, by storage battery, are its charging.

4. realize the remote monitoring center in claim 2, it is characterized in that, described monitoring center mainly comprises:

Wireless mobile communication devices, with the wireless communication unit group-net communication in described pen recorder, carries out the remote transmission of data;

Process software in computing machine and computing machine, is connected with wireless mobile communication devices, for steering order transmission, test figure parsing, demonstration, storage and geography information monitoring etc.

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