CN104344862A - Detection method for FCM10A type fuel consumption meter - Google Patents
Detection method for FCM10A type fuel consumption meter Download PDFInfo
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- CN104344862A CN104344862A CN201410522144.3A CN201410522144A CN104344862A CN 104344862 A CN104344862 A CN 104344862A CN 201410522144 A CN201410522144 A CN 201410522144A CN 104344862 A CN104344862 A CN 104344862A
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Abstract
The invention discloses a detection method for an FCM10A type fuel consumption meter. The method comprises the following steps: 1) connecting detection circuits; 2) setting the type of an output signal of a standard signal generator; 3) selecting a frequency scope and the number of measuring points of the output signal; 4) collecting fuel flow data; 5) judging the validity of the collected data; 6) recording and calculating a relative error of the FCM10A type fuel consumption meter; 7) evaluating a detection result, wherein if the obtained relative error is smaller than or equal to 0.2%, the precision of the detected FCM10A type fuel consumption meter can satisfy the measuring requirement of the fuel oil consumption rate of a diesel engine for actual production, and the measuring result is accurate and reliable; vice versa. The method disclosed by the invention can detect the FCM10A type fuel consumption meter, judge whether the precision satisfies the production need or not, provide a powerful guarantee for the accuracy and the reliability of the fuel oil consumption rate for debugging a main engine, and further provide a feasible method for the batch detection of the FCM10A type fuel consumption meter. The detection method has the advantages that the method is convenient, high-efficiency and reliable, and the method can be used for detecting the FCM10A type fuel consumption meter.
Description
Technical field
The present invention relates to the processing of marine diesel, particularly a kind of detection method of diesel engine for ship FCM10A type fuel consumption meter, belongs to Diesel Engine Technique Field.
Background technology
Fuel consumption is the important index of of examination marine diesel economic performance, along with the continuous rising of transportation cost, people more and more pay close attention to the fuel consumption of diesel engine, because can be passed judgment on the economic performance of marine diesel by fuel consumption, it is closely bound up with the transportation cost reduced in the boats and ships period of service.In commissioning process, if the fuel consumption of diesel engine is beyond the upper limit of desired value, then can cause this diesel engine cannot by the examination of classification society, therefore in diesel engine operational process, need according to technical requirement, measurements and calculations are carried out to the situation of fuel consume under appointment operating mode.
FCM10A type fuel consumption meter is the instrument carrying out fuel consumption detection for the diesel engine of need of production to debugging, but in the use procedure of this fuel consumption meter, find that the fuel consumption data of its survey calculation gained have distortion phenomenon.In order to ensure accuracy and the authenticity of the Rate of Fuel Consumption of Diesel recorded, carry out detecting reliably being extremely necessary to fuel consumption meter.FCM10A type fuel consumption meter is made up of data acquisition module and computing module, import and export traffic channel on data acquisition module is by data line connection mass flowmeter on a diesel engine, gather the flow signal of two mass flowmeters simultaneously, there is the corresponding relation of 0.01kg/Hz in the fuel oil quality of this flow signal and consumption, by the power of setting measurement time and diesel engine, namely computing module can draw the Rate of Fuel Consumption of Diesel under each operating mode.
Summary of the invention
The object of the invention is to the phenomenon of the detection data generation distortion existed for existing fuel consumption meter, a kind of detection method of FCM10A type fuel consumption meter is provided, the fuel consumption meter of this model is detected, guarantees accuracy and the reliability of measuring gained fuel consumption data in production run afterwards.
The technical scheme that the present invention solves its technical matters is as follows:
A detection method for FCM10A type fuel consumption meter, its concrete steps are as follows:
1) detection line is connected
The terminal of the output port of standard signal generator with the flowmeter passage of described FCM10A type fuel consumption meter is connected, and connects this FCM10A type fuel consumption meter and computer, fuel consumption measurement software is installed in this computer;
2) the output signal type of established standards signal generator
Select the type of the output signal of described standard signal generator to be frequency, waveform is square wave, and the Kopin voltage of this square wave is 5V, and low ordinary telegram pressure is 0V;
3) frequency range and the measurement of selecting output signal are counted
The frequency quantity limit scope of selected standard signal generator output signal is 2Hz ~ 200Hz, selected measurement point within the scope of this frequency quantity limit, and must comprise upper and lower bound two limits of frequency quantity limit scope in selected measurement point;
4) fuel flow data are gathered
Predetermined main engine power and flowmeter quantity is inputted in computer, the setting measurement time is 3min, standard signal generator sets a standard frequency in described selected measurement point and exports the output signal of this standard frequency, to be output stable after carry out the data acquisition of fuel flow, obtain the real-time curve of inlet flow rate and rate of discharge;
5) validity of image data is judged
Observe step 4) institute surveys fuel flow real-time curve move towards straight after whether there is obvious fluctuation, if this fuel flow real-time curve moves towards straight afterwards terminate ripple disable to Measuring Time, then image data is effectively, and records image data; If this fuel flow real-time curve move towards straight after to Measuring Time terminate before occur fluctuation and be attended by multiple crest, then image data is invalid, stop immediately measuring, the output of standard of closure signal generator, detect cable connect and system software whether normally, wait for after one minute, repeat above step 4) data acquisition, till image data effectively, and record image data;
6) relative error of record and calculating FCM10A type fuel consumption meter
On all selected measurement points, repeating said steps 4) and 5), obtain and fuel flow real-time curve under recording the frequency corresponding to each selected measurement point; After data acquisition completes, according to the fuel flow real-time curve of each selected measurement point in computer, the actual measurement fuel oil quality under the frequency obtaining corresponding to this selected measurement point by integral and calculating; Theoretical fuel oil quality by each selected measurement point of following formulae discovery:
m＝0.01×f×t×60，
In formula, m-selectes the theoretical fuel oil quality of measurement point, f-frequency (Hz), t-time (s);
Calculate respectively according to following formula and the relative error of fuel oil quality under obtaining the frequency corresponding to each selected measurement point:
(actual measurement fuel oil quality-theoretical fuel oil quality)/theoretical fuel oil quality × 100%;
(7) testing result is evaluated
If step 6) relative error≤0.2% of gained, then assert that the precision of tested FCM10A type fuel consumption meter can meet to the requirement that Rate of Fuel Consumption of Diesel is measured in actual production, its measurement result is accurate and reliably; Otherwise then assert that the precision of tested FCM10A type fuel consumption meter cannot meet to the requirement that Rate of Fuel Consumption of Diesel is measured in actual production, its measurement result is inaccurate and unreliable.
Further, the precision of described standard signal generator is 0.2 grade, and model is Agilent 33210A.
Further, described step 3) in, selected measurement point is uniformly distributed within the scope of selected frequency quantity limit, and its quantity is no less than 8.
Compared with prior art, the present invention has following beneficial effect:
Described detection method can detect FCM10A type fuel consumption meter, judge whether its precision meets need of production, the accuracy measured for main frame debugging intermediate fuel oil consumption rate and reliability provide sound assurance, simultaneously for the batch detection of FCM10A type fuel consumption meter provides practicable method.Meanwhile, for the conventional sense of other model fuel consumption meters provides reference, and can improve accordingly this detection method according to the technical characterstic of different fuel consumption meter, described detection method has convenience, efficient, reliable advantage.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is one of step schematic diagram of the present invention.
Fig. 3 is step schematic diagram two of the present invention.
Fig. 4 is the schematic diagram of the effective image data of the present invention.
Fig. 5 is the schematic diagram of invalidated acquisitions data of the present invention.
Embodiment
The present invention is according to the technical characteristic of FCM10A type fuel consumption meter, choose suitable standard signal generator, formulated efficient detection method easily, object is to provide effective detection foundation for the periodicity of FCM10A type fuel consumption meter detects with the conventional sense of the fuel consumption meter of other models.
By the following examples and further illustrate the detection method of FCM10A type fuel consumption meter of the present invention by reference to the accompanying drawings, but can not limit the scope of the invention with this.
Refer to Fig. 2, the detection method of FCM10A type fuel consumption meter of the present invention comprises following concrete steps:
1) detection line is connected
Refer to Fig. 1, be 0.2 grade with data line by precision, model is output (Output) port of the standard signal generator of Agilent 33210A, respectively with terminal 11 (+), 12 (-) of the flowmeter intake vent of FCM10A type fuel consumption meter, terminal 13 (+), 14 (-) of flowmeter outlet passage connect, connect FCM10A type fuel consumption meter and computer by USB cable, fuel consumption measurement software is installed in this computer.
2) the output signal type of established standards signal generator
After confirming that the connection of all cables is intact, open the switch of standard signal generator, selection signal type is frequency (Frequency), waveform is square wave (Square), the Kopin voltage (High level) arranging square wave is 5V, and low ordinary telegram pressure is (Low level) 0V.
3) frequency range and the measurement of selecting output signal are counted
The amount limit scope of the frequency of selected standard signal generator output signal is 2Hz ~ 200Hz; Selected measurement point within the scope of selected frequency quantity limit, selected measurement point should be uniformly distributed within the scope of this selected frequency quantity limit, the quantity of measurement point selected generally be no less than 8 points, and must comprise upper and lower bound two limits of frequency quantity limit scope in selected measurement point, namely selected measurement point must comprise 2Hz and 200Hz.
4) fuel flow data are gathered
Refer to Fig. 2, open the interface of fuel consumption measurement on computer, create new monitoring, intactly write host information and fuel oil information, measure measurement pattern in option and select succinct pattern, power input mode elects manual input as, and flowmeter quantity is double-current gauge.
Enter succinct pattern after pressing " determination " button and measure interface, as Fig. 3, set predetermined main engine power, Measuring Time is 3min;
Standard signal generator sets a standard frequency in described selected measurement point, press " Output " button, export the output signal of this standard frequency, to be output stable after, press " starting to measure " button on fuel consumption meter measurement interface, carried out the data acquisition of fuel flow by standard data acquisition module, obtain the real-time curve of inlet flow rate and rate of discharge, note the change observing this real-time curve simultaneously.
5) validity of image data is judged
Observe step 4) institute surveys fuel flow real-time curve move towards straight after whether there is obvious fluctuation, if this fuel flow real-time curve moves towards straight afterwards terminate ripple disable to Measuring Time, as shown in Figure 4, then image data is effectively, and records image data; If this fuel flow real-time curve move towards straight after to Measuring Time terminate before occur fluctuation and be attended by multiple crest, then image data is invalid, stop immediately measuring, the output of standard of closure signal generator, whether checkout equipment cable connects intact, whether system software normally runs, wait for after one minute, again " Output " button on standard signal generator is pressed, export the output signal of this standard frequency, repeat above step 4) data acquisition, till image data is effectively, and record image data.
6) relative error of record and calculating FCM10A type fuel consumption meter
On all selected measurement points, repeating said steps 4) and 5), obtain and fuel flow real-time curve under recording the frequency corresponding to each selected measurement point;
After the data acquisition of all selected measurement points completes, open the survey record in computer and calculate as follows in computer: according to the fuel flow real-time curve of each selected measurement point, the actual measurement fuel oil quality under the frequency obtaining corresponding to this selected measurement point by integral and calculating;
Because the pass of fuel oil quality and frequency is 0.01kg/Hz, the theoretical fuel oil quality m of each selected measurement point of following formulae discovery therefore can be passed through:
M=0.01 × f × t × 60, in formula, f-frequency (Hz), t-time (s);
Calculate respectively according to following formula and the relative error of fuel oil quality under obtaining the frequency corresponding to each selected measurement point:
(actual measurement fuel oil quality-theoretical fuel oil quality)/theoretical fuel oil quality × 100%.
(7) testing result is evaluated
If step 6) relative error≤0.2% of gained, then assert that the precision of tested FCM10A type fuel consumption meter can meet to the requirement that Rate of Fuel Consumption of Diesel is measured in actual production, its measurement result is accurate and reliably; Otherwise then assert that the precision of tested FCM10A type fuel consumption meter cannot meet to the requirement that Rate of Fuel Consumption of Diesel is measured in actual production, its measurement result is inaccurate and unreliable.
Detection method of the present invention is provide sound assurance to the accuracy of the measurement of fuel consumption and reliability during main frame debugging is submitted to, simultaneously for the detection of FCM10A type fuel consumption meter batch provides practicable method.In addition, the present invention is also for the conventional sense of the fuel consumption meter of other models provides reference, to improve accordingly described detection method according to the technical characterstic of different fuel consumption meters, this detection method is flexible and changeable and efficient, will certainly play a multiplier role in the testing process of fuel consumption meter.
Claims (3)
1. a detection method for FCM10A type fuel consumption meter, is characterized in that, the concrete steps of described detection method are as follows:
1) detection line is connected
The terminal of the output port of standard signal generator with the flowmeter passage of described FCM10A type fuel consumption meter is connected, and connects this FCM10A type fuel consumption meter and computer, fuel consumption measurement software is installed in this computer;
2) the output signal type of established standards signal generator
Select the type of the output signal of described standard signal generator to be frequency, waveform is square wave, and the Kopin voltage of this square wave is 5V, and low ordinary telegram pressure is 0V;
3) frequency range and the measurement of selecting output signal are counted
The frequency quantity limit scope of selected standard signal generator output signal is 2Hz ~ 200Hz, selected measurement point within the scope of this frequency quantity limit, and must comprise upper and lower bound two limits of frequency quantity limit scope in selected measurement point;
4) fuel flow data are gathered
Predetermined main engine power and flowmeter quantity is inputted in computer, the setting measurement time is 3min, standard signal generator sets a standard frequency in described selected measurement point and exports the output signal of this standard frequency, to be output stable after carry out the data acquisition of fuel flow, obtain the real-time curve of inlet flow rate and rate of discharge;
5) validity of image data is judged
Observe step 4) institute surveys fuel flow real-time curve move towards straight after whether there is obvious fluctuation, if this fuel flow real-time curve moves towards straight afterwards terminate ripple disable to Measuring Time, then image data is effectively, and records image data; If this fuel flow real-time curve move towards straight after to Measuring Time terminate before occur fluctuation and be attended by multiple crest, then image data is invalid, stop immediately measuring, the output of standard of closure signal generator, detect cable connect and system software whether normally, wait for after one minute, repeat above step 4) data acquisition, till image data effectively, and record image data;
6) relative error of record and calculating FCM10A type fuel consumption meter
On all selected measurement points, repeating said steps 4) and 5), obtain and fuel flow real-time curve under recording the frequency corresponding to each selected measurement point; After data acquisition completes, according to the fuel flow real-time curve of each selected measurement point in computer, the actual measurement fuel oil quality under the frequency obtaining corresponding to this selected measurement point by integral and calculating; Theoretical fuel oil quality by each selected measurement point of following formulae discovery:
m＝0.01×f×t×60，
In formula, m-selectes the theoretical fuel oil quality of measurement point, f-frequency (Hz), t-time (s);
Calculate respectively according to following formula and the relative error of fuel oil quality under obtaining the frequency corresponding to each selected measurement point:
(actual measurement fuel oil quality-theoretical fuel oil quality)/theoretical fuel oil quality × 100%;
(7) testing result is evaluated
If step 6) relative error≤0.2% of gained, then assert that the precision of tested FCM10A type fuel consumption meter can meet to the requirement that Rate of Fuel Consumption of Diesel is measured in actual production, its measurement result is accurate and reliably; Otherwise then assert that the precision of tested FCM10A type fuel consumption meter cannot meet to the requirement that Rate of Fuel Consumption of Diesel is measured in actual production, its measurement result is inaccurate and unreliable.
2. the detection method of FCM10A type fuel consumption meter according to claim 1, is characterized in that, the precision of described standard signal generator is 0.2 grade, and model is Agilent 33210A.
3. the detection method of FCM10A type fuel consumption meter according to claim 1, is characterized in that, described step 3) in, selected measurement point is uniformly distributed within the scope of selected frequency quantity limit, and its quantity is no less than 8.
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| CN107944372A (en) * | 2017-11-17 | 2018-04-20 | 珠海市多泰吉智能技术有限公司 | A kind of method and apparatus and computer-readable storage medium of the identification of signal validity |
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| CN107944372A (en) * | 2017-11-17 | 2018-04-20 | 珠海市多泰吉智能技术有限公司 | A kind of method and apparatus and computer-readable storage medium of the identification of signal validity |
| CN107944372B (en) * | 2017-11-17 | 2020-04-07 | 珠海市多泰吉智能技术有限公司 | Method and device for identifying signal validity and computer storage medium |
| CN109297569A (en) * | 2018-09-28 | 2019-02-01 | 潍柴动力股份有限公司 | A kind of scaling method and device of fuel consumption meter |
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