CN102353814B - Method for detecting output signal failure of wind direction sensor - Google Patents
Method for detecting output signal failure of wind direction sensor Download PDFInfo
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- CN102353814B CN102353814B CN201110181472A CN201110181472A CN102353814B CN 102353814 B CN102353814 B CN 102353814B CN 201110181472 A CN201110181472 A CN 201110181472A CN 201110181472 A CN201110181472 A CN 201110181472A CN 102353814 B CN102353814 B CN 102353814B
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Abstract
The invention relates to a method for detecting output signal failure of a wind direction sensor, belonging to the technical field of wind direction sensor detection. According to the technical scheme provided by the invention, the method for detecting output signal failure of the wind direction sensor is used for detecting whether the change of a wind direction signal output by the wind direction sensor is consistent with the Gray code coding rule or not, and comprises the following steps of: a, continually acquiring a Gray code wind direction signal output by the wind direction sensor so as to completely acquire all Gray code values in the wind direction signal change process; and b, comparing two adjacently acquired wind direction signal code values, and determining that a corresponding output position of the wind direction sensor fails when the change situations of the two adjacent wind direction signal code values are inconsistent with the change rule of the Gray code coding rule and the situations occur at the same output position for several times. Due to the adoption of the method, the reliability of the output signal position of the wind direction sensor is enhanced, the running reliability and stability of an automatic weather station are enhanced, process operation is convenient, and high adaptability is achieved.
Description
Technical field
The present invention relates to a kind of detection method, especially a kind of detection method of wind transducer output signal fault belongs to the technical field that wind transducer detects.
Background technology
The wind direction output signal of automatic weather station wind transducer is usually encoded with 7,8 Gray code, all corresponding wind direction value of each Gray's code value.Gray code is a kind of reliable coding, and two adjacent code values have only bit different, is particularly suitable for the corner displacement output signal of picture wind transducer, avoids reading the possibility of makeing mistakes.In actual motion, owing to suffer thunderbolt to wait inclement weather, environmental impact, the bad phenomenon of some bit loss often takes place in the signal output apparatus of wind transducer, exports incorrect signal, thereby can not get correct wind direction value.Present automatic weather station does not also have to discern automatically the ability that wind transducer output signal bits is damaged.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, a kind of detection method of wind transducer output signal fault is provided, its technological operation is convenient, and adaptability is good, improves the reliability of wind direction measurement result.
According to technical scheme provided by the invention, a kind of detection method of wind transducer output signal fault, said fault detection method is whether the variation of detection side's wind transducer output wind direction signals meets the gray encoding rule, comprises the steps:
The Gray code wind direction signals of a, the output of continuous acquisition wind transducer is so that intactly collect all Gray's code values of wind direction signals change procedure;
The wind direction signals code value of b, more adjacent twice collection; When the situation of change of said adjacent twice wind direction signals code value and Gray code coding rule Changing Pattern do not meet; And when above-mentioned situation repeatedly appears at identical carry-out bit, confirm that then the corresponding carry-out bit of wind transducer breaks down.
The frequency of said collection wind transducer output Gray code wind direction signals be 10000 times/second or more than.
Advantage of the present invention: the Gray code wind direction signals of continuous acquisition wind transducer output; When the variation of twice adjacent code value does not meet the gray encoding rule; Can judge that some carry-out bit is unusual,, can confirm the carry-out bit that breaks down through comparative result is repeatedly analyzed.Can in time discern fault through the relevant detection result, improve the reliability of wind direction measurement result, improve automatic weather station reliability of operation and stability, technological operation is convenient, and adaptability is good.
Embodiment
Below in conjunction with instantiation the present invention is described further.
The wind direction output signal of wind transducer is encoded with the Gray code mode.When wind direction when first angle changes to second angle, wind transducer will order all Gray's code values between first angle to the second of output angle continuously, the binary digit in two adjacent Gray code code values can only have one to change.Wind transducer with photodiode as output signal bits; When meeting with inclement weathers such as thunderbolt, environment; The fault that may cause wind transducer output signal bits causes the inaccurate of wind transducer output signal, influences the monitoring effect of automatic weather station.Therefore, need carry out serialization to the wind direction output signal that the expression wind direction changes and judge, could confirm the hardware fault whether of the Gray code generation of wind transducer; In the quite a while, if the wind direction variation of output signals meets the gray encoding rule, then wind transducer is normal, otherwise then undesired.For fear of above-mentioned situation, discern the damaged condition of wind transducer output signal early, improve the operational reliability of automatic weather station, the present invention comprises the steps: the detection method of wind transducer output signal fault
The Gray code wind direction signals of a, the output of continuous acquisition wind transducer is so that intactly collect all Gray's code values of wind direction signals change procedure;
Adopt the form of parallel data transmission to gather the Gray code wind direction signals that wind transducer is exported, promptly once can gather the Gray code wind direction signals of all; Wind direction in the atmosphere generally can change within a certain period of time, when the variation of wind direction angle reaches the resolving power of sensor, and corresponding the changing of coding meeting of the wind direction signals of wind transducer output; SF to wind transducer output Gray code wind direction signals is 10000 times/second.The frequency of said collection wind transducer output Gray code wind direction signals is relevant with the maximum wind direction pace of change that sensor can respond; Variation characteristic and sensor response characteristic according to wind direction; Adopt 10000 times/second frequency acquisition, can collect all signal code values that wind transducer produces fully in the wind direction change procedure.Through comparing after the wind direction signals to adjacent twice collection, judge whether wind transducer output signal bits has fault; Also can the position more than 10000 times/second to the SF of wind transducer; When increasing SF; Can increase the processing power requirement of treatment facilities such as computing machine, but frequency acquisition then can not intactly collect all Gray's code values of wind direction signals change procedure when low.
The wind direction signals code value of b, more adjacent twice collection; When the situation of change of said adjacent twice wind direction signals code value and Gray code coding rule Changing Pattern do not meet; Be that the encoding law that can only change a carry-out bit in situation of change and the Gray code coding rule of adjacent twice wind direction signals code value between adjacent twice signal code value does not meet; And when above-mentioned situation repeatedly appears at identical carry-out bit, confirm that then the corresponding carry-out bit of wind transducer breaks down.
When change of the wind arrived certain angle, wind transducer was exported corresponding Gray code; And the code value of the Gray code wind direction signals of adjacent twice output of wind transducer changes figure place can only have one, is the Changing Pattern of wind transducer output Gray code wind direction signals.When the output signal bits of wind transducer broke down, then wind transducer situation of change and the above-mentioned rule of exporting adjacent twice Gray code wind direction signals do not meet, and through repeatedly more all when identical carry-out bit, can access corresponding carry-out bit and export fault.After the Gray code wind direction signals that collects wind transducer output, coding in the wind direction signals of adjacent twice collection is compared.
When the Gray code wind direction signals of wind transducer output is sampled with 10000 times/second, can intactly collect all the Gray code wind direction signals in the wind direction change procedure; When wind direction did not change in atmosphere, the code value of the Gray code wind direction signals of collection can not change; After wind direction changes in atmosphere, and during resolving power of the every change sensor of wind direction angle, the Gray code wind direction signals code value of wind transducer output just has bit to be changed, thereby can express corresponding orientation and angle.If changing, adjacent twice code value surpasses bit; And when this phenomenon repeated multiple times occurs; The signal bits that then can affirm wind transducer output signal breaks down, and need keep in repair accordingly, to improve the operational reliability of automatic weather station wind transducer.
For example, when 7 Gray codes were 0000000, the expression orientation was 0, and angle is 0; When 7 Gray codes are 0000001, expression orientation 1, angle 3; When 7 Gray codes are 0000011, expression orientation 2, angle 6.Change to 6 when spending when wind transducer detects orientation angle from 0 degree, wind transducer should be exported 0000000,0000001,0,000,011 3 Gray's code value successively, only changes bit at every turn.In order to confirm whether wind transducer output signal has fault; Whether the Gray code wind direction signals that just needs the output of continuous acquisition wind transducer exists fault through confirming wind transducer output signal after the Changing Pattern of adjacent twice wind direction signals code value is analysed and compared.The wind direction signals code value of after analysing and comparing, finding adjacent twice collection does not change according to the gray encoding rule, promptly is not according to each variation bit, can judge that some carry-out bit is unusual; Through comparative result is repeatedly analyzed, can confirm the carry-out bit that breaks down.
Claims (2)
1. the detection method of a wind transducer output signal fault is characterized in that, said fault detection method is whether the variation that detects wind transducer output wind direction signals meets the gray encoding rule, comprises the steps:
(a), the Gray code wind direction signals of continuous acquisition wind transducer output so that intactly collect all Gray's code values of wind direction signals change procedure;
(b), the wind direction signals code value of more adjacent twice collection; When the situation of change of said adjacent twice wind direction signals code value and Gray code coding rule Changing Pattern do not meet; And when above-mentioned situation repeatedly appears at identical carry-out bit, confirm that then the corresponding carry-out bit of wind transducer breaks down.
2. according to the detection method of the said wind transducer output of claim 1 signal fault, it is characterized in that: the frequency of said collection wind transducer output Gray code wind direction signals is more than 10000 times/second.
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| CN103033648B (en) * | 2012-12-31 | 2016-09-14 | 北京佳讯飞鸿电气股份有限公司 | A kind of wind sensor output data validity detection method |
| CN105891546B (en) * | 2016-01-26 | 2018-11-23 | 沈阳工业大学 | The method of wind vane fault diagnosis in Wind turbines yaw system based on big data |
| CN112523973B (en) * | 2020-11-30 | 2022-03-01 | 上海电气风电集团股份有限公司 | Wind vane monitoring method and system of wind generating set and wind generating set |
| CN113406356A (en) * | 2021-06-08 | 2021-09-17 | 浙江省大气探测技术保障中心 | Gray code-based wind direction sensor detection method |
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| CN201247254Y (en) * | 2008-08-27 | 2009-05-27 | 敖振浪 | Automatic detection device for wind sensor of automatic meteorological station |
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Effective date of registration: 20191213 Address after: 214000 28 Weiming Road, Binhu District, Wuxi City, Jiangsu Province Patentee after: Aerospace new weather Technology Co., Ltd Address before: Jinxi road Binhu District 214125 Jiangsu city of Wuxi province No. 100 Patentee before: Jiangsu Provincial Radio Inst Co., Ltd. |
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