CN101839711A - Portable digitalized high-precision tilt angle measuring instrument and measuring method - Google Patents
Portable digitalized high-precision tilt angle measuring instrument and measuring method Download PDFInfo
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- CN101839711A CN101839711A CN 201010175336 CN201010175336A CN101839711A CN 101839711 A CN101839711 A CN 101839711A CN 201010175336 CN201010175336 CN 201010175336 CN 201010175336 A CN201010175336 A CN 201010175336A CN 101839711 A CN101839711 A CN 101839711A
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Abstract
The invention discloses a portable digitalized high-precision tilt angle measuring instrument and a measuring method. The measuring method comprises the following steps: measuring the acceleration component of a sensitive shaft direction through a gravitational acceleration sensor, indirectly reflecting the size of a tilt angle, converting a measured result through a special high-precision A/D converting chip, carrying out filtering processing for the measured result through a controller, and displaying through a digital tube. The device has small volume, light weight and convenient carry, can be powered by adopting a battery, can effectively inhibit the influence of temperature on the measured result and has stronger anti-shake capability; compared with a traditional measuring instrument, the measuring accuracy is greatly improved.
Description
Technical field
The present invention relates to a kind of portable digitalized high-precision tilt angle measuring instrument and measuring method.
Background technology
In building, in the industries such as bridge construction, the measurement at inclination angle is an indispensable link.Have under a lot of situations, also using traditional measurement of dip angle instrument, this instrument often pointer-type, operating personnel often need to estimate to read in reading, the precision of adding pointer measurement of dip angle instrument itself is not high enough, make measurement result that bigger deviation be arranged, and this survey instrument often volume ratio is bigger, carry very inconvenient.On the market some digital drift indicators are arranged also now, can digitized demonstration measurement result.These measuring instruments adopt swing measuring method on measuring principle, shortcoming is that responsive quality exists inertia, make that measuring instrument is anti-to fall, and anti-shake performance and real-time are good inadequately, vibrations waits more strongly use in the environment in measurement result instability just; Measurement result is subjected to Temperature Influence easily, must carry out complicated temperature compensation algorithm, and the approximate evaluation often of the backoff algorithm of the product that has, and does not consider the different temperatures effect; The product that has adopts the A/D modular converter of single-chip microcomputer inside to carry out analog to digital conversion, rather than analog-to-digital conversion module independently, and precision is often not high enough; Though the independent analog-to-digital conversion module of product is also arranged, but power unit is not through accurately handling, power unit has fluctuation, the analog-to-digital conversion module precision does not just reach the precision of institute's nominal far away, and the stability of power supply also has a significant impact the precision of sensor, and power supply has fluctuation also can cause sensor accuracy not reach the precision of institute's nominal.
Summary of the invention
In order to overcome the deficiency of existing dip measuring device, the present invention adopts following technical scheme:
A kind of portable digitalized high-precision tilt angle measuring instrument, this drift indicator comprise sensor, modular converter, controller and the display module that connects successively; Described sensor is a twin shaft acceleration of gravity sensor, also is provided with temperature sensor in the twin shaft acceleration of gravity sensor; Described modular converter is the A/D modular converter.
Described A/D modular converter adopts 16 A/D conversion chips.
The twin shaft of described twin shaft acceleration of gravity sensor is X-axis and Y-axis, and X-axis and Y-axis are orthogonal.
The measurement of dip angle scope of described twin shaft acceleration of gravity sensor is-90 °---90 °.
A kind of measuring method of portable digitalized high-precision tilt angle measuring instrument, this measuring method may further comprise the steps:
Step1: drift indicator is placed on the object under test;
Step2: the acceleration of gravity sensor is distinguished the component of acceleration of gravity on measured X axle and the Y direction, and converts the two-way measuring-signal to voltage signal, gives the A/D modular converter and handles, and carries out digitized filtered afterwards again;
Step3: the result after the digitized filtered is transferred to controller by the SPI communication modes handles;
Step4: controller utilizes temperature sensor that measurement result is compensated, and converts the numerical value after the compensation to angle value and shows with display.
In described step2, the scope of described voltage signal is 0-5V.
In described step2, the weight expression of acceleration of gravity is on the X-direction:
The weight expression of acceleration of gravity is on the Y direction:
So, utilize
,
The tangent value of expression is tried to achieve inclination angle beta promptly:
Wherein,
Be the component of acceleration of gravity G on X-axis,
Be the component of acceleration of gravity G on X-axis, g is an acceleration of gravity,
Be the angle of Y-axis and acceleration of gravity direction,
Angle for X-axis and acceleration of gravity direction.
In described step4, the compensation process of described measurement result is as follows:
If the temperature value that temperature sensor collects is T, measuring error is Offcorr, and the measurement of dip angle value is Tempvalue, and actual value is value, then:
So:
Wherein, Offcorr is a measuring error, and T is a temperature value, and value is the actual value of measurement of dip angle, and Tempvalue is the measured value of measurement of dip angle.
The invention has the beneficial effects as follows: it adopts digitizing to show, makes things convenient for reading; Volume is little, and is in light weight, low in energy consumption, can use powered battery, is easy to carry; The measuring accuracy height; Its working stability, real-time is good, makes measurement of dip angle become simple and fast; Anti-fall ability and the anti-vibration ability is more intense, can relatively use in the rugged environment; Adopt the double-shaft tilt angle survey sensor to measure the inclination angle of single shaft direction, can effectively suppress the influence of temperature to measurement result, add the filtering algorithm of software section, dual compensation model has suppressed the influence that temperature is floated greatly.
Description of drawings
Fig. 1 is a principle of the invention structural representation;
Fig. 2 is a measurement of dip angle initial position synoptic diagram;
Fig. 3 is the angled synoptic diagram of drift indicator and initial position;
Fig. 4 is a measurement result digitized filtered process flow diagram;
Fig. 5 is this device circuit figure;
Fig. 6 is this device profile synoptic diagram;
Wherein: 1 is the gravity acceleration transducer; 2 is the A/D modular converter; 3 is controller; 4 is display module; 5 is crust of the device; 6 is charactron; 7 is pilot lamp; 8 is power switch.
Embodiment
Be further described below in conjunction with drawings and Examples:
A kind of portable digitalized high-precision tilt angle measuring instrument, this dip measuring device adopts the mode of vertical framework, and sensitive axis is orthogonal.With these drift indicator 5 parallel being placed on the object under test, be respectively applied for the inclination angle of measuring same direction, sine value and cosine value that measurement result is respectively corresponding inclination angle are divided by the result then, obtain the tangent value at inclination angle, thereby obtain the inclination angle surveyed.
This device adopts the acceleration of gravity sensor 1 of twin shaft output to measure the inclination angle.Two sensitive axis supposing sensor are respectively X-axis and Y-axis, and X-axis and Y-axis are orthogonal in same plane.Accordingly, two identical acceleration signal transmission paths are just arranged: a component that is used for acceleration of gravity on the measured X direction of principal axis; Article one, be used to measure the gravitational acceleration component on the Y direction.When sensor was in horizontal direction, X-axis was vertical with the acceleration of gravity direction with the formed plane of Y-axis, and this moment, acceleration of gravity all was zero at the component of X-axis and Y direction.When sensor and horizontal direction form certain angle, then formed plane of X-axis and Y-axis and acceleration of gravity direction out of plumb, then acceleration of gravity can form certain component in X-axis and Y direction, its size and inclination angle size positive correlation.Can measure gravitational acceleration component X-axis, Y-axis on by the sensitive axes on X-axis, the Y-axis this moment.Obtain corresponding inclination angle value by certain calculating then.Except measuring acceleration of gravity, also have built-in temperature sensor, temperature is gathered, provide parameter thereby float the inhibition algorithm for follow-up temperature, improve temperature and float the inhibition effect.
In order to suppress the influence of temperature to measurement result, the present invention measures the inclination angle of single channel with the measurement of two-way acceleration of gravity.The initial position that makes sensor as shown in Figure 2.When sensor and acceleration of gravity direction form certain angle, as shown in Figure 3.So:
Wherein,
Be respectively the component of acceleration of gravity G on X-axis, g is an acceleration of gravity, and α is the angle of Y-axis and acceleration of gravity direction, and β is the angle of X-axis and acceleration of gravity direction.
Therefore, inclination angle beta can be used
,
The tangent value of expression is tried to achieve, that is:
Wherein,
,
Be respectively the component of acceleration of gravity on X-axis and Y-axis, β is the angle of X-axis and acceleration of gravity direction.
The span of β can be between-90 ° to+90 ° in the formula (4).The dip measuring device of vertical framework makes all have than higher degree of accuracy and resolution in 180 degree scopes, satisfied the requirement of industry spot to measurement of dip angle scope and degree of accuracy.In addition, because acceleration of gravity sensor 1 has repeatable temperature characterisitic, the output of two axles has identical range of temperature, and this can not produce too much influence for ratio calculation, therefore, this metering system can effectively reduce the influence that temperature produces sensitive axis.
A lot of controllers 3 itself have the A/D translation function, but precision is often not high, and most of integrated A/D conversion chip can only reach 10 precision, and the present invention adopts 16 independently A/D conversion chips in order to improve precision.The circuit diagram of native system as shown in Figure 5.The power supply process chip is carried out the voltage stabilizing processing to power supply, gives power supply quite responsive measurement of dip angle chip and A/D conversion chip are powered.The measurement of dip angle chip becomes the voltage signal of 0-5V with the conversion of signals of acceleration of gravity sensor 1, gives the A/D conversion chip and handles, and the A/D conversion chip is transferred to controller 3 with transformation result by the SPI communication modes again and handles.
Output signal on the sensitive axes converts digital quantity to by high-precision A/D modular converter 2, and to send into corresponding intelligent processing module be in the middle of the controller 3, in the controller 3 measurement result carried out corresponding compensation and handle.The temperature sensor that native system adopted has summed up the approximate formula that suppresses temperature through great deal of experiment data.The assumed temperature sensor acquisition to temperature value be T, measuring error is Offcorr, the measurement of dip angle value is Tempvalue, and actual value is value, then:
Wherein, Offcorr is a measuring error, and T is a temperature value;
So:
Wherein, value is the actual value of measurement of dip angle, and Tempvalue is the measurement of dip angle value.
Because the present invention may be used in the middle of the comparison rugged environment, extraneous various interference might influence the precision of measurement result, even may make indivedual measurement results produce mistake.In order further to improve the job stability of this device, we carry out digitized filtered to the result that A/D transforms.Particular flow sheet sorts to 50 numerical value of sampling as shown in Figure 4, gets its 30 middle results then and averages.
For the measurement result value after the digitized filtered, this device adopts the LED charactron to show.For the control of charactron 6, mainly select signal to form by data-signal and charactron position.Native system adopts dynamic scan mode, and all charactron 6 shared 8 position datawires utilize people's vision to stop phenomenon, in the 20ms with all charactrons 6 display surface sweepings one time, at a time, have only one bright.
The use of this device as shown in Figure 6.The shell of handle assembly is placed on the inclination angle that need measure, keeps shell parallel with measured angle, turns on the power switch 8, and the bright device that then illustrates of pilot lamp normally starts, and the numerical value of charactron 6 demonstrations this moment is the inclination angle of shell.This numerical value can the real-time variation along with the variation at shell angle of inclination.
Claims (8)
1. a portable digitalized high-precision tilt angle measuring instrument is characterized in that, this drift indicator comprises sensor, modular converter, controller and the display module that connects successively; Described sensor is a twin shaft acceleration of gravity sensor, also is provided with temperature sensor in the twin shaft acceleration of gravity sensor; Described modular converter is the A/D modular converter.
2. a kind of portable digitalized high-precision tilt angle measuring instrument as claimed in claim 1 is characterized in that, described A/D modular converter adopts 16 A/D conversion chips.
3. a kind of portable digitalized high-precision tilt angle measuring instrument as claimed in claim 1 is characterized in that, the twin shaft of described twin shaft acceleration of gravity sensor is X-axis and Y-axis, and X-axis and Y-axis are orthogonal.
4. portable digitalized high-precision tilt angle measuring instrument as claimed in claim 3 is characterized in that, the measurement of dip angle scope of described twin shaft acceleration of gravity sensor is :-90 °-90 °.
5. a measuring method that adopts the portable digitalized high-precision tilt angle measuring instrument of claim 1 is characterized in that, this measuring method may further comprise the steps:
Step1: drift indicator is placed on the object under test;
Step2: the acceleration of gravity sensor is distinguished the component of acceleration of gravity on measured X axle and the Y direction, and converts the two-way measuring-signal to voltage signal, gives the A/D modular converter and handles, and carries out digitized filtered afterwards again;
Step3: the result after the digitized filtered is transferred to controller by the SPI communication modes handles;
Step4: controller utilizes temperature sensor that measurement result is compensated, and converts the numerical value after the compensation to angle value and shows with display.
6. the measuring method of portable digitalized high-precision tilt angle measuring instrument as claimed in claim 5 is characterized in that, in described step2, the scope of described voltage signal is 0-5V.
7. the measuring method of portable digitalized high-precision tilt angle measuring instrument as claimed in claim 5 is characterized in that, in described step2, the weight expression of acceleration of gravity is on the X-direction:
The weight expression of acceleration of gravity is on the Y direction:
So, utilize
,
The tangent value of expression is tried to achieve inclination angle beta promptly:
Wherein,
Be the component of acceleration of gravity G on X-axis,
Be the component of acceleration of gravity G on X-axis, g is an acceleration of gravity, and α is the angle of Y-axis and acceleration of gravity direction, and β is the angle of X-axis and acceleration of gravity direction.
8. the measuring method of portable digitalized high-precision tilt angle measuring instrument as claimed in claim 5 is characterized in that, in described step4, the compensation process of described measurement result is as follows:
If the temperature value that temperature sensor collects is T, measuring error is Offcorr, and the measurement of dip angle value is Tempvalue, and actual value is value, then:
So:
Wherein, Offcorr is a measuring error, and T is a temperature value, and value is the actual value of measurement of dip angle, and Tempvalue is the measured value of measurement of dip angle.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353351A (en) * | 2011-06-28 | 2012-02-15 | 惠州Tcl移动通信有限公司 | Lateral shooting angle detecting method, inclined shooting angle detecting method and mobile phone |
| CN102997896A (en) * | 2012-12-04 | 2013-03-27 | 保定供电公司 | Inclining warning device |
| CN103697859A (en) * | 2012-09-27 | 2014-04-02 | 上海西门子医疗器械有限公司 | Measuring device for measuring tilt angle and medical equipment |
| CN104111088A (en) * | 2013-04-18 | 2014-10-22 | 盛思锐股份公司 | System and method for determining sensor accuracy of a portable electronic device |
| CN104864847A (en) * | 2015-05-22 | 2015-08-26 | 杭州电子科技大学 | Measuring circuit of inclination measuring instrument |
| CN106840096A (en) * | 2016-12-23 | 2017-06-13 | 江西飞尚科技有限公司 | A kind of inclinometer and method for optimizing the temperature-compensating time |
| CN107044848A (en) * | 2016-08-24 | 2017-08-15 | 江西飞尚科技有限公司 | A kind of rod-type inclinometer temperature compensation |
| CN108180936A (en) * | 2017-12-19 | 2018-06-19 | 朱迎春 | Recording device and method are shaken for the inclination of express transportation |
| CN109999471A (en) * | 2019-04-12 | 2019-07-12 | 漳州泰里斯体育器材有限公司 | A kind of wide range combat sports strike force measuring device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013000359A1 (en) * | 2011-06-28 | 2013-01-03 | 惠州Tcl移动通信有限公司 | Lateral photography angle detection method, vertical photography angle detection method and cell phone |
| CN102353351B (en) * | 2011-06-28 | 2014-01-15 | 惠州Tcl移动通信有限公司 | Lateral shooting angle detecting method, inclined shooting angle detecting method and mobile phone |
| CN102353351A (en) * | 2011-06-28 | 2012-02-15 | 惠州Tcl移动通信有限公司 | Lateral shooting angle detecting method, inclined shooting angle detecting method and mobile phone |
| CN103697859A (en) * | 2012-09-27 | 2014-04-02 | 上海西门子医疗器械有限公司 | Measuring device for measuring tilt angle and medical equipment |
| CN102997896A (en) * | 2012-12-04 | 2013-03-27 | 保定供电公司 | Inclining warning device |
| CN104111088B (en) * | 2013-04-18 | 2018-12-21 | 盛思锐股份公司 | System and method for determining the sensor accuracy of portable electronic device |
| CN104111088A (en) * | 2013-04-18 | 2014-10-22 | 盛思锐股份公司 | System and method for determining sensor accuracy of a portable electronic device |
| CN104864847A (en) * | 2015-05-22 | 2015-08-26 | 杭州电子科技大学 | Measuring circuit of inclination measuring instrument |
| CN107044848A (en) * | 2016-08-24 | 2017-08-15 | 江西飞尚科技有限公司 | A kind of rod-type inclinometer temperature compensation |
| CN106840096A (en) * | 2016-12-23 | 2017-06-13 | 江西飞尚科技有限公司 | A kind of inclinometer and method for optimizing the temperature-compensating time |
| CN108180936A (en) * | 2017-12-19 | 2018-06-19 | 朱迎春 | Recording device and method are shaken for the inclination of express transportation |
| CN108180936B (en) * | 2017-12-19 | 2024-02-23 | 朱迎春 | Oblique vibration recording device and method for express delivery transportation |
| CN109999471A (en) * | 2019-04-12 | 2019-07-12 | 漳州泰里斯体育器材有限公司 | A kind of wide range combat sports strike force measuring device |
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Application publication date: 20100922 |