CN101979979A - Pressure sensor detection system and method - Google Patents
Pressure sensor detection system and method Download PDFInfo
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- CN101979979A CN101979979A CN 201010289299 CN201010289299A CN101979979A CN 101979979 A CN101979979 A CN 101979979A CN 201010289299 CN201010289299 CN 201010289299 CN 201010289299 A CN201010289299 A CN 201010289299A CN 101979979 A CN101979979 A CN 101979979A
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Abstract
The invention discloses a pressure sensor detection system and a pressure sensor detection method. The system is characterized by comprising a master control chip, wherein the master control chip is provided with a first reference input end, a detection input end and a second reference input end; the first reference input end is connected with a first reference pressure sensor; a pressure detection port of the first reference pressure sensor is communicated with the atmosphere; the second reference input end is connected with a second reference pressure sensor; a pressure detection port of the second reference pressure sensor is communicated with a negative pressure source; and the master control chip is connected with an LCD display. The pressure sensor detection system has the advantages of simple structure, low cost, and capacities of finishing accurate detection of static flow and dynamic flow and also meeting the requirements on rapid detection in motorcycle industrialization.
Description
Technical field
The invention belongs to pressure transducer detection technique field, relate to specifically and be used for pressure transducer detection system and the detection method thereof that a kind of motorcycle pressure transducer detects.
Background technology
Pressure transducer is an accurate device, it also is the important devices of vehicle electric injection system, be mainly used in the negative pressure value on the monitoring motor intake manifold, by identification to the negative pressure value size, can obtain the Working state data of engine, for throttle opening and distributive value size provide basic reference data.So the detection of pressure transducer is very important.Before pressure transducer is installed motorcycle, all need the performance of fuel injector is detected, because industrialization needs testing process rapidly and efficiently.
And existing technological means is just with the output terminal of multimeter detected pressures sensor, complicated operation, and can only the indicated pressure sensor whether normal under static atmospheric pressure, detect less than real dynamic negative-pressure data.More be difficult to satisfy industrialization needs detection needs rapidly and efficiently.
Summary of the invention
The object of the present invention is to provide pressure transducer detection system a kind of simple in structure, with low cost, not only can finish the accurate detection of quiescent flow and dynamic flow, can also satisfy the needs of motorcycle industrialization fast detecting.
Technical scheme of the present invention is as follows: a kind of pressure transducer detection system, and its key is: comprise main control chip, this main control chip is provided with first benchmark input end, detects the input end and second benchmark input end;
Described first benchmark input end is connected with the first datum pressure sensor, and the pressure detection mouth of this first datum pressure sensor communicates with atmosphere, and this first datum pressure sensor is used to send the Static Detection value to described main control chip;
Described second benchmark input end is connected with the second datum pressure sensor, and the pressure detection mouth of this second datum pressure sensor communicates with negative pressure source, and this second datum pressure sensor is used to send detection of dynamic to described main control chip;
First output terminal of described main control chip, second output terminal, the 3rd output terminal, the 4th output terminal are connected on the LCD display.
After tested pressure transducer connects into the detection input end, under atmospheric environment, detect earlier, its testing result and the first datum pressure sensor compare, and export static comparative result by the output terminal group and show to LCD display.
Again the tested pressure transducer and the second datum pressure sensor are put into same negative pressure source, relatively the detected value of the two is exported dynamic comparative result by the output terminal group and is shown to LCD display.
Whether two groups of detection comparative results just can directly detect pressure transducer and damage.This mode is simple to operate, and is convenient and swift, satisfied the needs of motorcycle industrialization fast detecting.
Second benchmark input end of described main control chip is connected with the described second datum pressure sensor through a stitch of contact pin;
The detection input end of described main control chip is connected with another stitch of described contact pin.
A kind of detection method of described pressure transducer detection system, its key are main control chip execution the following step:
Be used for the step that static state reads the second Static Detection value b of the first Static Detection value a of the first datum pressure sensor and the second datum pressure sensor;
At this moment, the first datum pressure sensor, the second datum pressure sensor and tested pressure transducer are in the atmospheric pressure environment simultaneously.
Be used to the step of judging whether the described first Static Detection value a and the second Static Detection value b equate;
If the two is unequal, then be used for the step of output alarm signal;
If the two equates, then be used for reading the Static Detection value c of tested pressure transducer, and make Static Detection value c deduct the first Static Detection value a by detecting input end, obtain the step of static difference d;
Whether the absolute value that is used to judge described static difference d is less than the step of static error threshold value e;
If the absolute value of d more than or equal to static error threshold value e, then is used for the step of output alarm signal;
If the absolute value of d is less than static error threshold value e;
Be used to show the step of current Static Detection value c and pairing force value thereof; The detected Static Detection value of tested pressure transducer c is a magnitude of voltage often, each magnitude of voltage is all to there being an atmospheric pressure value, this corresponding relation is a kind of sensor and treatment technology of maturation, mapping table by default formula or experience can obtain, and this is not giving unnecessary details again.
At this moment, finished the Static Detection of tested pressure transducer.
Finish Static Detection, the second datum pressure sensor and tested pressure transducer are arranged under the same negative pressure source environment, because the variation of air pressure environment, what the second datum pressure sensor and tested pressure transducer obtained no longer is quiescent value, but dynamic value.
Be used to the step of judging whether the described second Static Detection value b changes;
If the second Static Detection value b does not change, then return the described step of judging whether the described second Static Detection value b changes of being used to;
If the second Static Detection value b changes, the second datum pressure sensor obtains the second detection of dynamic value b ';
Be used for obtaining simultaneously the step of the detection of dynamic value c ' of second current detection of dynamic value b ' and described tested pressure transducer;
Be used for detection of dynamic value c ' and deduct the second detection of dynamic value b ', obtain the step of dynamic difference d ';
Whether the absolute value that is used to judge described dynamic difference d ' is less than the step of dynamic error threshold value e ';
If the absolute value of d ' more than or equal to dynamic error threshold value e ', then is used for the step of output alarm signal, and the step of demonstration detection of dynamic value b ' and c ' and both pairing force value;
If the absolute value of d ' less than dynamic error threshold value e ', is used to judge whether to finish to detect relatively for 3 times judge;
Judge if do not finish to detect for 3 times relatively, then return the described step that is used for obtaining simultaneously the detection of dynamic value c ' of second current detection of dynamic value b ' and described tested pressure transducer, proceed detection of dynamic;
Judge if finished to detect relatively for 3 times, then be used to export qualified signal, and show the step of detection of dynamic value b ' and c ' and both pairing force value.
Remarkable result of the present invention is: pressure transducer detection system a kind of simple in structure, with low cost is provided, not only can have finished the accurate detection of quiescent flow and dynamic flow, can also satisfy the needs of motorcycle industrialization fast detecting.
Description of drawings
Fig. 1 is a circuit structure diagram of the present invention;
Fig. 2 is a principle of work block diagram of the present invention;
Fig. 3 is the workflow diagram of main control chip.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, 2, a kind of pressure transducer detection system is provided with main control chip U1, and this main control chip U1 is provided with the first benchmark input end AN0, detects the input end AN1 and the second benchmark input end AN2;
The described first benchmark input end AN0 is connected with the first datum pressure sensor 1, and the pressure detection mouth of this first datum pressure sensor 1 communicates with atmosphere, and this first datum pressure sensor 1 is used to send the Static Detection value to described main control chip U1;
The described second benchmark input end AN2 is connected with the second datum pressure sensor 2, and the pressure detection mouth of this second datum pressure sensor 2 communicates with negative pressure source 4, and this second datum pressure sensor 2 is used to send detection of dynamic to described main control chip U1;
The first output terminal LCD1 of described main control chip U1, the second output terminal LCD2, the 3rd output terminal LCD3, the 4th output terminal LCD4 are connected on the same LCD display.
The second benchmark input end AN2 of described main control chip U1 is connected with the described second datum pressure sensor 2 through the stitch of contact pin J1;
The detection input end AN1 of described main control chip U1 is connected with another stitch of described contact pin J1.
The model of main control chip U1 is P16F87.
As shown in Figure 3, a kind of detection method of described pressure transducer detection system, its key are that main control chip U1 carries out the following step:
Be used for the step that static state reads the second Static Detection value b of the first Static Detection value a of the first datum pressure sensor 1 and the second datum pressure sensor 2;
At this moment, the first datum pressure sensor 1, the second datum pressure sensor 2 and tested pressure transducer are in the atmospheric pressure environment simultaneously.
Be used to the step of judging whether the described first Static Detection value a and the second Static Detection value b equate;
If the two is unequal, then be used for the step of output alarm signal;
If the two equates, then be used for reading the Static Detection value c of tested pressure transducer, and make Static Detection value c deduct the first Static Detection value a by detecting input end AN1, obtain the step of static difference d;
Whether the absolute value that is used to judge described static difference d is less than the step of static error threshold value e;
If the absolute value of d more than or equal to static error threshold value e, then is used for the step of output alarm signal;
If the absolute value of d is less than static error threshold value e;
Static error threshold value e can be 2,3,4 or other numerical value, can be by setting in advance.
Be used to show the step of current Static Detection value c and pairing force value thereof; The detected Static Detection value of tested pressure transducer c is a magnitude of voltage often, each magnitude of voltage is all to there being an atmospheric pressure value, this corresponding relation is a kind of sensor and treatment technology of maturation, mapping table by default formula or experience can obtain, and this is not giving unnecessary details again.
At this moment, finished the Static Detection of tested pressure transducer.
Finish Static Detection, the second datum pressure sensor 2 and tested pressure transducer are arranged under same negative pressure source 4 environment, because the variation of air pressure environment, what the second datum pressure sensor 2 and tested pressure transducer obtained no longer is quiescent value, but dynamic value.
Be used to the step of judging whether the described second Static Detection value b changes;
If the second Static Detection value b does not change, then return the described step of judging whether the described second Static Detection value b changes of being used to;
If the second Static Detection value b changes, the second datum pressure sensor 2 obtains the second detection of dynamic value b ';
Be used for obtaining simultaneously the step of the detection of dynamic value c ' of second current detection of dynamic value b ' and described tested pressure transducer;
Be used for detection of dynamic value c ' and deduct the second detection of dynamic value b ', obtain the step of dynamic difference d ';
Whether the absolute value that is used to judge described dynamic difference d ' less than dynamic error threshold value e, step;
If the absolute value of d ' more than or equal to dynamic error threshold value e ', then is used for the step of output alarm signal; And the step of demonstration detection of dynamic value b ' and c ' and both pairing force value;
If the absolute value of d ' less than dynamic error threshold value e ', is used to judge whether to finish to detect relatively for 3 times judge;
Dynamic error threshold value e ' can be 2,3,4 or other numerical value, can be by setting in advance.
Judge if do not finish to detect for 3 times relatively, then return the described step that is used for obtaining simultaneously the detection of dynamic value c ' of second current detection of dynamic value b ' and described tested pressure transducer, proceed detection of dynamic;
Judge if finished to detect relatively for 3 times, then be used to export qualified signal, and show the step of detection of dynamic value b ' and c ' and both pairing force value.
Its principle of work is:
When one, the pressure transducer detection system powers on operation, at first to the input of the first datum pressure sensor 1 and the second datum pressure sensor 2, two datum pressure sensor values are the same under the atmospheric pressure environments of static state, to determine that two pressure transducers do not have damage, be unlikely to influence testing result.If damage arranged then show to report to the police by LCD display.
Two, read the signal of tested pressure transducer 3, differ in 2%, think that then static data is accurate as if signal with the first datum pressure sensor 1.
Three, the tested pressure transducer 3 and the second datum pressure sensor 2 are inserted negative pressure source 4, the pressure transducer detection system reads the two data automatically and compares, no matter how many negative pressure of tested gas is, both data errors think that then the detection of dynamic of tested pressure transducer 3 is passed through if be not more than 2% of benchmark 2.
Negative-pressure gas can be to be provided by the negative pressure air pump, this negative pressure is adjustable and stable, also can be that artificial needle tubing or north material suction pipe replaces, because the signal waveform of the pressure transducer 3 and the second datum pressure sensor 2 is the same all the time, so do not influence measuring accuracy and result
Although above structure is described the preferred embodiments of the present invention in conjunction with the accompanying drawings; but the invention is not restricted to above-mentioned embodiment; above-mentioned embodiment only is schematic rather than determinate; those of ordinary skill in the art is under enlightenment of the present invention; under the prerequisite of aim of the present invention and claim; can make multiple similar expression; as change the model of main control chip U1; dynamic and static demonstration changes LCD or other display modes into by LED; the workflow control mode: the generating mode of negative pressure source 4 etc., such conversion all falls within protection scope of the present invention.
Claims (3)
1. pressure transducer detection system, it is characterized in that: comprise main control chip (U1), this main control chip (U1) is provided with first benchmark input end (AN0), detects input end (AN1) and second benchmark input end (AN2);
Described first benchmark input end (AN0) is connected with the first datum pressure sensor (1), the pressure detection mouth of this first datum pressure sensor (1) communicates with atmosphere, and this first datum pressure sensor (1) is used to send the Static Detection value to described main control chip (U1);
Described second benchmark input end (AN2) is connected with the second datum pressure sensor (2), the pressure detection mouth of this second datum pressure sensor (2) communicates with negative pressure source (4), and this second datum pressure sensor (2) is used to send detection of dynamic to described main control chip (U1);
First output terminal (LCD1) of described main control chip (U1), second output terminal (LCD2), the 3rd output terminal (LCD3), the 4th output terminal (LCD4) are connected on the LCD display, and this LCD display is used to show testing result.
2. according to the described pressure transducer detection system of claim 1, it is characterized in that: second benchmark input end (AN2) of described main control chip (U1) is connected with the described second datum pressure sensor (2) through a stitch of contact pin (J1);
The detection input end (AN1) of described main control chip (U1) is connected with another stitch of described contact pin (J1).
3. the detection method of the described pressure transducer detection system of claim 1 is characterized in that, main control chip (U1) is carried out the following step:
Be used for the step that static state reads the second Static Detection value b of the first Static Detection value a of the first datum pressure sensor (1) and the second datum pressure sensor (2);
Be used to the step of judging whether the described first Static Detection value a and the second Static Detection value b equate;
If the two is unequal, then be used for the step of output alarm signal;
If the two equates, then be used for reading the Static Detection value c of tested pressure transducer, and make Static Detection value c deduct the first Static Detection value a by detecting input end (AN1), obtain the step of static difference d;
Whether the absolute value that is used to judge described static difference d is less than the step of static error threshold value e;
If the absolute value of d more than or equal to static error threshold value e, then is used for the step of output alarm signal;
If the absolute value of d is less than static error threshold value e;
Be used to show the step of current Static Detection value c and pairing force value thereof;
Be used to the step of judging whether the described second Static Detection value b changes;
If the second Static Detection value b does not change, then return the described step of judging whether the described second Static Detection value b changes of being used to;
If the second Static Detection value b changes, the second datum pressure sensor (2) obtains the second detection of dynamic value b ';
Be used for obtaining simultaneously the step of the detection of dynamic value c ' of second current detection of dynamic value b ' and described tested pressure transducer;
Be used for detection of dynamic value c ' and deduct the second detection of dynamic value b ', obtain the step of dynamic difference d ';
Whether the absolute value that is used to judge described dynamic difference d ' is less than the step of dynamic error threshold value e ';
If the absolute value of d ' more than or equal to dynamic error threshold value e ', then is used for the step of output alarm signal; And the step of demonstration detection of dynamic value b ' and c ' and both pairing force value;
If the absolute value of d ' less than dynamic error threshold value e ', is used to judge whether to finish to detect relatively for 3 times judge;
Judge if do not finish to detect for 3 times relatively, then return the described step that is used for obtaining simultaneously the detection of dynamic value c ' of second current detection of dynamic value b ' and described tested pressure transducer, proceed detection of dynamic;
Judge if finished to detect relatively for 3 times, then be used to export qualified signal, and show the step of detection of dynamic value b ' and c ' and both pairing force value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102892999A CN101979979B (en) | 2010-09-21 | 2010-09-21 | Pressure sensor detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102892999A CN101979979B (en) | 2010-09-21 | 2010-09-21 | Pressure sensor detection system and method |
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| Publication Number | Publication Date |
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| CN101979979A true CN101979979A (en) | 2011-02-23 |
| CN101979979B CN101979979B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102892999A Expired - Fee Related CN101979979B (en) | 2010-09-21 | 2010-09-21 | Pressure sensor detection system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000565A (en) * | 2014-05-16 | 2014-08-27 | 上海道生医疗科技有限公司 | Radial artery touch force sensor detection device and detection circuit |
| CN104000564A (en) * | 2014-05-16 | 2014-08-27 | 上海道生医疗科技有限公司 | Touch force sensor detection device and circuit |
| CN104485304A (en) * | 2015-01-07 | 2015-04-01 | 海太半导体（无锡）有限公司 | Chip adhesion detection device |
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| US3777546A (en) * | 1972-03-30 | 1973-12-11 | Nasa | System for calibrating pressure transducer |
| US4142420A (en) * | 1976-01-19 | 1979-03-06 | Nippondenso Co., Ltd. | Method for electrically calibrating the output of pressure transducers |
| US4598381A (en) * | 1983-03-24 | 1986-07-01 | Rosemount Inc. | Pressure compensated differential pressure sensor and method |
| CN101793581A (en) * | 2009-01-29 | 2010-08-04 | 通用汽车环球科技运作公司 | The method of the anode pressure sensor that detection is freezed and algorithm |
| CN201795895U (en) * | 2010-09-21 | 2011-04-13 | 力帆实业(集团)股份有限公司 | Pressure sensor detection device |
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2010
- 2010-09-21 CN CN2010102892999A patent/CN101979979B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777546A (en) * | 1972-03-30 | 1973-12-11 | Nasa | System for calibrating pressure transducer |
| US4142420A (en) * | 1976-01-19 | 1979-03-06 | Nippondenso Co., Ltd. | Method for electrically calibrating the output of pressure transducers |
| US4598381A (en) * | 1983-03-24 | 1986-07-01 | Rosemount Inc. | Pressure compensated differential pressure sensor and method |
| CN101793581A (en) * | 2009-01-29 | 2010-08-04 | 通用汽车环球科技运作公司 | The method of the anode pressure sensor that detection is freezed and algorithm |
| CN201795895U (en) * | 2010-09-21 | 2011-04-13 | 力帆实业(集团)股份有限公司 | Pressure sensor detection device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000565A (en) * | 2014-05-16 | 2014-08-27 | 上海道生医疗科技有限公司 | Radial artery touch force sensor detection device and detection circuit |
| CN104000564A (en) * | 2014-05-16 | 2014-08-27 | 上海道生医疗科技有限公司 | Touch force sensor detection device and circuit |
| CN104485304A (en) * | 2015-01-07 | 2015-04-01 | 海太半导体（无锡）有限公司 | Chip adhesion detection device |
| CN104485304B (en) * | 2015-01-07 | 2018-03-20 | 海太半导体（无锡）有限公司 | A kind of chip sticks together detection means |
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| Publication number | Publication date |
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| CN101979979B (en) | 2012-01-11 |
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