CN201522277U - Inclination angle measuring instrument - Google Patents

Inclination angle measuring instrument Download PDF

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Publication number
CN201522277U
CN201522277U CN2009202202040U CN200920220204U CN201522277U CN 201522277 U CN201522277 U CN 201522277U CN 2009202202040 U CN2009202202040 U CN 2009202202040U CN 200920220204 U CN200920220204 U CN 200920220204U CN 201522277 U CN201522277 U CN 201522277U
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Prior art keywords
obliquity sensor
motor
measurement instrument
incline measurement
inclination angle
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CN2009202202040U
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高国伟
吴秀芹
李倩芸
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Beijing Information Science and Technology University
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Beijing Information Science and Technology University
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Abstract

The utility model provides an inclination angle measuring instrument which is applicable to the technical field of measuring, comprises an inclination angle sensor, an A/D converter, a microprocessor and a digital output interface, and is characterized in that the inclination angle measuring instrument also comprises a bracket, a rotating disk and a motor. The inclination angle sensor is installed on the rotating disk which is fixed on the rotating shaft of the motor, the motor is vertically arranged on the bracket, the bracket comprises a horizontal panel and a vertical panel, the horizontal panel is a measuring datum plane, and the vertical panel is used for fixing the motor. The inclination angle measuring instrument has convenient use, and sensitivity calibration and zero adjustment of the inclination angle sensor can be realized by one device.

Description

A kind of incline measurement instrument
Technical field
The utility model relates to field of measuring technique, and in particular, the utility model relates to a kind of incline measurement instrument.
Background technology
Obliquity sensor is a device of measuring the pitch angle, and present many engineerings all need the inclination angle is measured in using, and these measured values are used for monitoring or control to system.
Publication number is the incline measurement device that discloses respectively in the Chinese patent application of CN1003344A, CN1013063A, CN1320808A and CN1668892A based on " liquid pendulum ".Its ultimate principle is, measurement mechanism comprises two potential electrode and an open electrode, and electrode places in the airtight chamber, and the high-k liquids and gases are housed in the chamber.When measurement mechanism was in the surface level position, two electrodes had equal area to be immersed in the dielectric fluid, constituted two equal capacitors by electrode and open electrode; When inclination measurement instrument rotated an angle, the area that two electrodes are immersed in the liquid was then unequal, and the electric capacity difference of generation is then represented the size at measured pitch angle.
Publication number is that the Chinese patent application of CN1532523A discloses a kind of digital display type level and angel measuring instrument based on " solid pendulum ", it comprises shell and angle measurement unit, angle measurement unit is an electric capacity measurement of angle sensor, the main grid of shell and electric capacity angel measuring instrument or secondary grid are connected, also have a gravity vertical means that automatically replies and remain on the gravity plumbness all the time in the shell inner cavity, the secondary grid of gravity vertical means and electric capacity angel measuring instrument or main grid are connected and coaxial rotation; Also be provided with a precision positions switch that is used to determine absolute zero position on the shell, the gravity vertical means is made of weight, bolster and floating drum, the position of floating drum and being shaped as along the axle rotational symmetry of hanging down in the weight.
How above-mentioned prior art calibrates the sensitivity and the zero drift of incline measurement instrument if all not relating to, as everyone knows, because there are the temperature and time drift inevitably in metering circuit, sensitive element etc., to introduce sensitivity drift and zero drift to whole instrument, therefore, sensitivity and zero-bit being calibrated is to guarantee to measure necessary accurately work.
The utility model content
The purpose of this utility model is to provide a kind of incline measurement instrument, is intended to solve existing incline measurement instrument and can not realizes sensitivity calibration and zero adjustment simultaneously, measures inaccurate problem.
The utility model is achieved in that a kind of incline measurement instrument, comprises obliquity sensor, A/D converter, microprocessor and digital output interface, it is characterized in that:
Described incline measurement instrument also comprises support, rotating circular disk, motor;
Do correct electrical connection between described obliquity sensor, A/D converter, microprocessor and digital output interface, the motor;
Described obliquity sensor is installed on the described rotating circular disk;
Described rotating circular disk is fixed on the turning axle of described motor, can be around the described rotation shaft rotary random angle of described motor;
Described motor is vertically mounted on the described support, and described support comprises a horizontal panel and a vertical panel, and described horizontal panel is the measuring basis face, and described vertical panel is used for fixing motor.
The incline measurement instrument that the utility model provides is easy to use, can carry out sensitivity calibration and zero adjustment automatically when powering at every turn, makes measurement result more accurate.
As shown from the above technical solution, the utility model is fixed on the turning axle of motor by the rotating circular disk that obliquity sensor will be installed, described motor is vertically mounted on the described support again, adopts the method for sensitivity calibration and zero adjustment, has following beneficial effect:
1, it is convenient the incline measurement instrument to be used, and can carry out sensitivity calibration and zero adjustment after powering on;
2, just can carry out two kinds of calibrations by a kind of device, simplify the structure of incline measurement instrument;
3, the incline measurement result is more accurate.
Description of drawings
Figure 1 shows that structural representation based on the condenser type obliquity sensor of " solid pendulum ";
Figure 2 shows that the incline measurement instrumental sensitivity calibration that the utility model embodiment provides and the principle schematic of zero adjustment;
Figure 3 shows that the structured flowchart of the incline measurement instrument that the utility model embodiment provides;
Figure 4 shows that the workflow diagram of the incline measurement instrument that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
So-called sensitivity just is meant the ratio of exporting variable quantity and input variable quantity, and when output was linearity with the input pass, the sensitivity regression was the ratio of output with input.
Figure 1 shows that structural representation based on the condenser type obliquity sensor of " solid pendulum ".Obliquity sensor among Fig. 1 is measured the angle of inclination by perception by the terrestrial gravitation vector in object axle center, and it comprises a semi-girder that is fixed on the housing, connects a movable pole plate on the semi-girder, and movable pole plate is between two fixed polar plates.For ease of explanation, the semi-girder among Fig. 1 is reduced to elastic system with certain damping.The gravity of object m makes semi-girder produce distortion, for different pitch angle, has corresponding with it semi-girder deflection.Along with semi-girder deforms under the effect of gravity, movable pole plate correspondingly moves between two fixed polar plates, the change in location of movable pole plate will cause the change of electric capacity between the pole plate, by detecting the electric capacity between the pole plate, can know the size at pitch angle.It is to be noted, though the present invention will be described to be based on the condenser type slant angle sensor of " solid pendulum " herein, but those skilled in the art will appreciate that the utility model is equally applicable to the measurement mechanism based on " liquid pendulum " or " gas pendulum " and other technology.
As shown in Figure 1, when the pitch angle was φ, under the action of gravity of object m and the axial force that forms is F=mgsin φ, described acting force made the end of semi-girder produce displacement x:
x = F k = mg k sin φ - - - ( 1 )
Wherein k is an elastic strength.Can utilize following formula that displacement x is converted to a voltage output quantity:
Vp = k p x = k p k mg sin φ - - - ( 2 )
Wherein Kp represents by detecting voltage that capacitance variations obtains and the scale-up factor between the displacement x.Final output behind the process gain amplifier is V as a result OFor:
V O = k p k v k mg sin φ - - - ( 3 )
When in ± 15 ° of small angle ranges, measuring, can think V OLinear with φ, promptly
V O = k p k v k mg πφ 180 - - - ( 4 )
Order Sen = π k p k v kφ mg , Then Sen is the sensitivity of described obliquity sensor, and formula (4) can be reduced to:
V O＝Sen·φ (5)
The sensitivity and the zero adjustment synoptic diagram of the incline measurement instrument that provides according to the utility model embodiment are provided, describe the sensitivity and the zero adjustment process of incline measurement instrument of the present utility model below in detail.
The utility model embodiment provides a kind of incline measurement instrument, and it comprises support, rotating circular disk, obliquity sensor, A/D converter, stepper motor, microprocessor and digital output interface.Described A/D converter collection is also changed the output voltage of described obliquity sensor, and its result is delivered to described microprocessor, described microprocessor calculates pitch angle between measuring basis face and the surface level based on specific funtcional relationship according to the output voltage of described obliquity sensor.Described obliquity sensor is installed on the described rotating circular disk, described rotating circular disk is vertically fixed on the turning axle of described motor, described motor is vertically mounted on the described support, described support comprises a horizontal panel and a vertical panel, described horizontal panel is the measuring basis face, and described vertical panel is used for fixing motor., described rotating circular disk can be around the rotation shaft rotary random angle of described motor.
At first, described obliquity sensor is placed on the described rotating circular disk the described measuring basis face of the Surface Vertical of described rotating circular disk on described support.This position is the initial position of described obliquity sensor, it is primary importance, at described primary importance place, write down the output voltage of described obliquity sensor, then, with the vertical rotation of described rotating circular disk one standard angle θ, this position is the second place of described obliquity sensor, described standard angle θ writes down the output voltage of described obliquity sensor when the described second place once more after the time-delay between positive and negative 15 °.When described obliquity sensor was in horizontality, the output voltage of described obliquity sensor was zero in theory, and there is zero drift in fact described obliquity sensor, has a zero drift voltage V ψSo, be respectively at the output voltage of the described primary importance and the described second place:
Figure G2009202202040D00051
φ in the formula 1For described obliquity sensor in described primary importance with respect to the inclination angle of described measuring basis face value, φ 2For described obliquity sensor is worth at the inclination angle of the described second place with respect to described measuring basis face.
Deducting formula (6) by formula (7) gets:
ΔV＝V 2-V 1＝Sen·(φ 2-φ 1)＝Sen·θ (8)
Get by formula (8):
Sen = V 2 - V 1 θ - - - ( 9 )
Can obtain the value of sensitivity S en by formula (9), sensitivity S en is applied to follow-up measurement, can finish the calibration of sensitivity.
After the sensitivity calibration, continuation vertically rotates to the 3rd position with respect to 180 ° of described primary importances with described rotating circular disk, the output voltage of the described obliquity sensor of time-delay back record, then described obliquity sensor is then different at the output voltage of described primary importance and described the 3rd position, is respectively:
Figure G2009202202040D00054
In the formula-φ 1Inclination angle with respect to described measuring basis face is worth in described the 3rd position for described obliquity sensor.
Formula (10) is added following formula (11) to be got divided by 2:
Figure G2009202202040D00061
From formula (12), as can be seen,, can obtain zero drift voltage V by measuring the output voltage of the described obliquity sensor of described primary importance and described the 3rd position φ, in follow-up measurement, the measuring voltage value is deducted the zero drift magnitude of voltage, just can obtain real magnitude of voltage, through type (5) just can go out real angle value by inverse, thereby finish zero adjustment.In actual application, following pacing items must satisfy:
Rotating circular disk when described primary importance, the second place and the 3rd position is in the same plane.
When calibrating automatically, should avoid the surveying instrument vibrations as far as possible.
Because of there is certain response time in described obliquity sensor, so before reading described obliquity sensor output voltage, should make described rotating circular disk keep certain duration, so that the output of described obliquity sensor reaches equilibrium state in described primary importance, the second place and the 3rd position.
As shown in Figure 3, the structured flowchart of the incline measurement instrument that provides for the utility model embodiment for ease of explanation, only shows the part relevant with the utility model.
The structured flowchart of the incline measurement instrument that provides according to the utility model embodiment is provided.In the incline measurement instrument that the utility model provides, described motor selects for use the stepper motor that is easy to accurately control to realize the rotation of described rotating circular disk.Described motor also can select for use servomotor to realize the rotation of described rotating circular disk.Described obliquity sensor is installed in the marginal position of described rotating circular disk, and described rotating circular disk is vertically mounted on the turning axle of described stepper motor, and described stepper motor and described rotating circular disk are all fixed by described support.Gather the output voltage of the described obliquity sensor of described primary importance, the second place and the 3rd position by described A/D converter, described microprocessor is handled the data of gathering, finish after sensitivity calibration and the zero adjustment, by the pitch angle value of digital output interface output measurement face.The digital output interface that the embodiment of the invention provides is the RS232 interface.
In the utility model embodiment, described obliquity sensor is selected the obliquity sensor based on " solid pendulum " for use;
Further, the utility model also can be selected for use based on the obliquity sensor of " liquid pendulum " or based on the obliquity sensor of " gas pendulum ".
The workflow diagram of the incline measurement instrument that Fig. 4 provides for the utility model embodiment.Comprise several steps:
Described incline measurement instrument electrifying startup, initialization;
Read first output voltage values that obliquity sensor is stated in described primary importance place;
Described microprocessor is controlled described motor and is rotated, and makes standard angle of the vertical rotation of described rotating circular disk to the second place;
Second output voltage values that obliquity sensor is stated in described second place place is read in time-delay;
Divided by described standard angle, calculate the sensitivity of described obliquity sensor by the difference of described second output voltage values and described first output voltage values;
Described microprocessor is controlled described motor and is rotated, and makes described rotating circular disk vertically rotate to the 3rd position of 180 ° of described relatively primary importances once more;
Delay time, read the output voltage values of the described obliquity sensor in described the 3rd position;
According to the output voltage of the described obliquity sensor of described primary importance and described the 3rd position and, calculate zero drift voltage;
Time-delay, the formal measurement.
In measuring process,, can obtain the true inclination angle value of surface measurements after the computing according to sensitivity and the zero drift voltage that try to achieve the front.
It should be noted that at last: above embodiment is only in order to explanation the technical solution of the utility model but not limit it, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement the technical solution of the utility model, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solutions of the utility model.

Claims (7)

1. an incline measurement instrument comprises obliquity sensor, A/D converter, microprocessor and digital output interface, it is characterized in that:
Described incline measurement instrument also comprises support, rotating circular disk, motor;
Do correct electrical connection between described obliquity sensor, A/D converter, microprocessor and digital output interface, the motor;
Described obliquity sensor is installed on the described rotating circular disk;
Described rotating circular disk is fixed on the turning axle of described motor, can be around the rotation shaft rotary random angle of motor;
Described motor is vertically mounted on the described support, and described support comprises a horizontal panel and a vertical panel, and described horizontal panel is the measuring basis face, and described vertical panel is used for fixing motor.
2. incline measurement instrument as claimed in claim 1 is characterized in that: described obliquity sensor is the obliquity sensor based on " solid pendulum ".
3. incline measurement instrument as claimed in claim 1 is characterized in that: described obliquity sensor is the obliquity sensor based on " liquid pendulum ".
4. incline measurement instrument as claimed in claim 1 is characterized in that: described obliquity sensor is the obliquity sensor based on " gas pendulum ".
5. incline measurement instrument as claimed in claim 1 is characterized in that: described motor is a stepper motor.
6. incline measurement instrument as claimed in claim 1 is characterized in that: described motor is a servomotor.
7. incline measurement instrument as claimed in claim 1 is characterized in that: described digital output interface is the RS232 interface.
CN2009202202040U 2009-10-26 2009-10-26 Inclination angle measuring instrument Expired - Fee Related CN201522277U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042823A (en) * 2009-10-26 2011-05-04 北京信息科技大学 Inclination angle measuring device and measuring method thereof
CN102419170A (en) * 2011-08-18 2012-04-18 中联重科股份有限公司 Inclination angle measuring apparatus, method, and processor
CN102865854A (en) * 2012-09-14 2013-01-09 深圳创维－Rgb电子有限公司 Tilt angle measurement device
CN103134474A (en) * 2013-02-27 2013-06-05 徐工集团工程机械股份有限公司 Working platform inclination angle measurement method and apparatus thereof
CN105823465A (en) * 2016-05-20 2016-08-03 吴清荣 Ground tilt monitoring device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042823A (en) * 2009-10-26 2011-05-04 北京信息科技大学 Inclination angle measuring device and measuring method thereof
CN102419170A (en) * 2011-08-18 2012-04-18 中联重科股份有限公司 Inclination angle measuring apparatus, method, and processor
CN102865854A (en) * 2012-09-14 2013-01-09 深圳创维－Rgb电子有限公司 Tilt angle measurement device
CN102865854B (en) * 2012-09-14 2015-01-14 深圳创维－Rgb电子有限公司 Tilt angle measurement device
CN103134474A (en) * 2013-02-27 2013-06-05 徐工集团工程机械股份有限公司 Working platform inclination angle measurement method and apparatus thereof
CN105823465A (en) * 2016-05-20 2016-08-03 吴清荣 Ground tilt monitoring device
CN105823465B (en) * 2016-05-20 2018-12-25 吴清荣 Ground device for monitoring inclination

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