CN113671873A - High-precision wind speed detection method for reducing self-calibration power consumption - Google Patents
High-precision wind speed detection method for reducing self-calibration power consumption Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
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- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention relates to a high-precision wind speed detection method for reducing self-calibration power consumption, and belongs to the field of wind speed monitoring. A high-precision wind speed detection method for reducing self-calibration power consumption is characterized in that in a wind speed detection instrument, a hardware circuit comprises an instantaneous electric quantity energy storage unit with the capacity of 2000uF, an MCU control unit, a voltage acquisition unit and a zero self-calibration unit; the input end of the instantaneous electric quantity energy storage unit is connected with a 12V direct current power supply through a 1.2K resistor for supplying power, so that the charging current of the energy storage circuit is not more than 10 mA; the output end of the instantaneous electric quantity energy storage unit is connected to the MCU control unit through the voltage acquisition unit, so that the real-time acquisition of the voltage of the output end is realized, and the running state of the zero self-calibration unit is intelligently controlled by the MCU control unit according to the voltage of the output end and a software process. The invention reduces the whole power consumption of the wind speed instrument and ensures the measurement precision and stability of the wind speed.
Description
Technical Field
The invention belongs to the field of wind speed monitoring, and relates to a high-precision wind speed detection method for reducing self-calibration power consumption.
Background
The coal industry gradually upgrades to high-end, intelligent and green transformation, the coal mine intelligence and safety level are improved, and the development of high quality in the coal industry is promoted, so that the development direction of coal mine safety equipment is realized. The field of mining roadway wind speed monitoring is dominated by a wind speed sensor based on a differential pressure principle, and the wind speed sensor is approved by coal mine users.
In the underground coal mine, the measurement of the wind speed range of (0.4-15.0) m/s is realized by adopting a differential pressure principle and a pitot tube pressure taking structure and adopting a zero self-calibration technology. Because the differential pressure element has the phenomena of time drift, temperature drift and pressure hysteresis, the influence of the time drift, the temperature drift and the pressure hysteresis on zero offset needs to be corrected by adopting a zero self-calibration technology, and the measurement stability is improved. The whole power consumption of the instrument can be increased in the operation process of the zero self-calibration technology, particularly, a sensor in a coal mine safety monitoring system is particularly sensitive to the power consumption, the communication distance of the sensor can be reduced due to the increase of the power consumption, and at present, no related technical research is carried out on the low-power self-calibration technology, so that the wind speed sensor and the instrument in the existing monitoring system still adopt a conventional method to operate the zero self-calibration function, and sacrifice a certain loading distance.
The method adopts a clearance self-calibration technology and a mode of being provided with a large-capacity capacitor energy storage or a battery, solves the problem that the power consumption of the wind speed sensor and instruments is obviously increased when the zero self-calibration function is operated, and solves the technical problem of low-power-consumption operation of the wind speed sensor.
Disclosure of Invention
In view of the above, the present invention provides a high-precision wind speed detection method with reduced self-calibration power consumption. The problem that the power consumption of the wind speed sensor and the instrument is obviously increased when the zero self-calibration function is operated is solved, and the current is increased by not more than 10mA when the zero self-calibration function is operated.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-precision wind speed detection method for reducing self-calibration power consumption is characterized in that in a wind speed detection instrument, a hardware circuit comprises an instantaneous electric quantity energy storage unit with the capacity of 2000uF, an MCU control unit, a voltage acquisition unit and a zero self-calibration unit; the input end of the instantaneous electric quantity energy storage unit is connected with a 12V direct current power supply through a 1.2K resistor for supplying power, so that the charging current of the energy storage circuit is not more than 10 mA; the output end of the instantaneous electric quantity energy storage unit is connected to the MCU control unit through the voltage acquisition unit, so that the real-time acquisition of the voltage of the output end is realized, and the running state of the zero self-calibration unit is intelligently controlled by the MCU control unit according to the voltage of the output end and a software process.
Optionally, in the wind speed detecting instrument, an array D1 storing zero point differential pressure data, with a length of 20, is established;
setting a constant M of self-calibration times as 20;
establishing an array D2 for storing real-time voltage data, wherein the length is 5;
setting a discharge voltage constant to be 5.6V;
setting a self-calibration interval time constant to be 1 second;
the MCU control unit collects and calculates the wind speed value in real time, collects the voltage value Vnew of the output end of the instantaneous electric quantity energy storage unit in real time, and updates a voltage value array D2 in an iterative mode;
d2[0] ═ D2[1], D2[1] ═ D2[2] … D2[ N2-2] ═ D2[ N2-1], D2[ N2-1] ═ Vnew, and the output terminal voltage value is calculated;
the MCU control unit intelligently judges whether to start a zero-point self-calibration function according to the detection state of the wind speed value, if the self-calibration function needs to be started at the moment, a timer is adopted to judge the voltage value of the instantaneous electric quantity energy storage unit every 1s, when the working voltage reaches 5.6V, the MCU control unit controls the zero-point self-calibration unit to be started, collects a zero-point differential pressure value Pnew at the moment once, and simultaneously updates a zero-point differential pressure value array D1 in an iterative mode;
D1[0]＝D1[1],D1[1]＝D1[2]……D1[N1-2]＝D1[N1-1],D1[N1-1]＝Pnew；
when the collection frequency of the zero-point differential pressure value reaches the set self-calibration frequency constant 20, the MCU control unit closes the zero-point self-calibration unit, and meanwhile, the zero-point differential pressure value at the moment is calculated according to the array D1, so that the low-power-consumption wind speed zero-point differential pressure self-calibration is completed.
The invention has the beneficial effects that: the power consumption of the whole wind speed instrument is greatly reduced, and the measurement precision and stability of the wind speed are ensured.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a flow chart of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
As shown in fig. 1 and 2, in the wind speed detecting instrument, a hardware circuit includes an instantaneous electric energy storage unit with a capacity of 2000uF, an MCU control unit, a voltage acquisition unit, and a zero-point self-calibration unit. The input end of the instantaneous electric quantity energy storage unit is connected with a 12V direct current power supply through a 1.2K resistor for supplying power, so that the charging current of the energy storage circuit is not more than 10 mA; the output end of the instantaneous electric quantity energy storage unit is connected to the MCU control unit through the voltage acquisition unit, so that the real-time acquisition of the voltage of the output end is realized, and the running state of the zero self-calibration unit is intelligently controlled by the MCU control unit according to the voltage of the output end and a software process.
The software flow comprises establishing an array D1 for storing zero differential pressure data, length 20; setting a constant M of self-calibration times as 20; establishing an array D2 for storing real-time voltage data, wherein the length is 5; setting a discharge voltage constant to be 5.6V; setting a self-calibration interval time constant to be 1 second; in the operation process of the sensor, the MCU control unit acquires and calculates the wind speed value in real time, acquires the voltage value Vnew of the output end of the instantaneous electric energy storage unit in real time, updates a voltage value array D2 in an iterative mode, updates a D2[0] ═ D2[1], updates a D2[1] ═ D2[2] … D2[ N2-2] ═ D2[ N2-1], updates a D2[ N2-1] ═ Vnew, and calculates the voltage value of the output end; the method comprises the steps that an MCU control unit intelligently judges whether a zero self-calibration function is started or not according to the detection state of a wind speed value, if the self-calibration function needs to be started at the moment, a timer is used for judging the voltage value of an instantaneous electric quantity energy storage unit every 1s, when the working voltage reaches 5.6V, the MCU control unit controls the zero self-calibration unit to be started, the zero differential pressure value Pnew at the moment is collected once, meanwhile, a zero differential pressure value array D1 is updated in an iterative mode, D1[0] ═ D1[1], D1[1] ═ D1[2] … … D1[ N1-2] ═ D1[ N1-1], and D1[ N1-1] < Pnew. When the collection frequency of the zero point differential pressure value reaches the set self-calibration frequency constant 20, the MCU control unit closes the zero point self-calibration unit, and simultaneously, the zero point differential pressure value at the moment is calculated according to the array D1, so that a complete low-power-consumption wind speed zero point differential pressure self-calibration is completed, the working current of the zero point self-calibration function supported by the method is only increased by 10mA compared with the conventional working current, and compared with the conventional mode, the working current during the zero point self-calibration is reduced by more than 90 mA.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (2)
1. A high-precision wind speed detection method for reducing self-calibration power consumption is characterized by comprising the following steps: in the wind speed detection instrument, a hardware circuit comprises an instantaneous electric quantity energy storage unit with the capacity of 2000uF, an MCU control unit, a voltage acquisition unit and a zero self-calibration unit; the input end of the instantaneous electric quantity energy storage unit is connected with a 12V direct current power supply through a 1.2K resistor for supplying power, so that the charging current of the energy storage circuit is not more than 10 mA; the output end of the instantaneous electric quantity energy storage unit is connected to the MCU control unit through the voltage acquisition unit, so that the real-time acquisition of the voltage of the output end is realized, and the running state of the zero self-calibration unit is intelligently controlled by the MCU control unit according to the voltage of the output end and a software process.
2. The high-precision wind speed detection method for reducing self-calibration power consumption according to claim 1, wherein the method comprises the following steps: establishing an array D1 for storing zero point differential pressure data in the wind speed detection instrument, wherein the length of the array D1 is 20;
setting a constant M of self-calibration times as 20;
establishing an array D2 for storing real-time voltage data, wherein the length is 5;
setting a discharge voltage constant to be 5.6V;
setting a self-calibration interval time constant to be 1 second;
the MCU control unit collects and calculates the wind speed value in real time, collects the voltage value Vnew of the output end of the instantaneous electric quantity energy storage unit in real time, and updates a voltage value array D2 in an iterative mode;
d2[0] ═ D2[1], D2[1] ═ D2[2] … D2[ N2-2] ═ D2[ N2-1], D2[ N2-1] ═ Vnew, and the output terminal voltage value is calculated;
the MCU control unit intelligently judges whether to start a zero-point self-calibration function according to the detection state of the wind speed value, if the self-calibration function needs to be started at the moment, a timer is adopted to judge the voltage value of the instantaneous electric quantity energy storage unit every 1s, when the working voltage reaches 5.6V, the MCU control unit controls the zero-point self-calibration unit to be started, collects a zero-point differential pressure value Pnew at the moment once, and simultaneously updates a zero-point differential pressure value array D1 in an iterative mode;
D1[0]＝D1[1],D1[1]＝D1[2]……D1[N1-2]＝D1[N1-1],D1[N1-1]＝Pnew；
when the collection frequency of the zero-point differential pressure value reaches the set self-calibration frequency constant 20, the MCU control unit closes the zero-point self-calibration unit, and meanwhile, the zero-point differential pressure value at the moment is calculated according to the array D1, so that the low-power-consumption wind speed zero-point differential pressure self-calibration is completed.
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- 2021-08-20 CN CN202110960646.4A patent/CN113671873A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| JPS63223569A (en) * | 1987-03-13 | 1988-09-19 | Agency Of Ind Science & Technol | Method and device for calibrating anemometer for measuring air current |
| CN102957213A (en) * | 2012-10-25 | 2013-03-06 | 上海臻源电力电子有限公司 | Intermittent digital sensor working power supply for supplying power with weak environment energy |
| CN103808963A (en) * | 2013-04-12 | 2014-05-21 | 北京普华亿能风电技术有限公司 | Wind speed and wind direction calibration system |
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| CN109884341A (en) * | 2019-03-25 | 2019-06-14 | 中煤科工集团重庆研究院有限公司 | Method and system for automatically calibrating differential pressure zero value of wind speed measurement |
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