CN102927963B - Detecting method for preset position of monitoring device - Google Patents

Abstract

The invention discloses a detecting method for a preset position of a monitoring device. The detecting method comprises the following steps: 1), arranging a vertical detecting screen in front of a cradle head, wherein the horizontal distance between the detecting screen and the cradle head is recorded as Y; 2), horizontally fixing a luminescent module at the top end of the cradle head, wherein the light emitted by the luminescent module can radiate to the detecting screen, and an included angle between the light and the detecting screen is Theta; 3), controlling the cradle head to move to a predetermined preset position; 4), controlling the cradle head to horizontally and freely rotate, returning the cradle head to the predetermined preset position, and measuring the distance Delta x between the returning position and the initial position; and 5), a preset position deviation angle being psi=arctan(tan Theta + Delta X/Y)- Theta. By obliquely crossing the luminescent module with the detecting screen, the displacement deviation value on the detecting screen between the initial position and the returning position can be increased, and the adaptability and accuracy for the detecting system is improved.

Description

The detection method of the presetting bit of supervising device

Technical field

The present invention relates to technical field of video monitoring, particularly relate to a kind of detection method of presetting bit of supervising device.

Background technology

In field of video monitoring, The Cloud Terrace (or ball machine) not only plays the effect supporting and install video camera, the more important thing is the field range expanding video camera, video camera can be made to rotate in the horizontal direction and the vertical direction.At present, detection The Cloud Terrace (or ball machine, being described for The Cloud Terrace below) the method conventional method of presetting bit is: is first arranged on a predetermined presetting bit at The Cloud Terrace and a vertical detection screen is set in its front, at The Cloud Terrace top fixed placement laser module, the emission of light of laser module and The Cloud Terrace top are at grade, the laser beam sent at this presetting bit laser module is vertically radiated at and detects on screen and set this point is initial bit, record the coordinate figure of initial bit simultaneously, after The Cloud Terrace moves to other positions, recall this presetting bit again, because the precision problem of The Cloud Terrace, the presetting bit position of the presetting bit position versus The Cloud Terrace setting that The Cloud Terrace is recalled has certain deviation angle, it is that a section moves that this deviation angle is reflected on detection screen, move as Δ x by measuring this section, The Cloud Terrace is known y apart from the distance of detection screen simultaneously, then (rotary motion on the surface level of The Cloud Terrace is circular motion to deviation angle θ=arctan (Δ x/y), so angular deviation embodied in space be one section of minor arc Δ l, but Δ l < < y in actual test, so in order to convenience of calculation, conventional Δ x replaces Δ l).

But, although the detection method above by presetting bit is simple to operate and testing result is more accurate, but this detection method just detects for the presetting bit of Product Precision scope at 0.1 ° and following watch-dog, then cannot test for higher precision, as the equipment under test that presetting bit precision is 0.03 °, and equipment under test distance detects screen distance when being 4 meters, according to the relevant regulations in national mensuration, the precision of surveying instrument at least should be 1/2 of equipment under test precision, generally choose 1/3 or 1/5, then above-mentioned detection method at least discernmible distance, delta x=tan (0.01) * 4000=0.69mm on detection screen, the displacement of 0.69mm has been difficult to differentiate, if there is less displacement again, detection system is just difficult to differentiate more, measuring error can be caused, or even measuring error.

Summary of the invention

The object of the invention is the technological deficiency for existing in prior art, and a kind of detection method of presetting bit of supervising device is provided.

The technical scheme adopted for realizing object of the present invention is:

A detection method for the presetting bit of supervising device, comprises the following steps,

1) arrange a vertical detection screen in The Cloud Terrace front, the horizontal range of itself and The Cloud Terrace is designated as Y,

2) fix an illuminating module at The Cloud Terrace upper horizontal, the light that described illuminating module sends can expose to and to detect on screen and the angle of light and detection screen is θ;

3) control The Cloud Terrace and move to a predetermined presetting bit, and luminous point illuminating module exposed on detection screen is designated as initial bit;

4) control to recall to this predetermined presetting bit after The Cloud Terrace level rotates freely, the luminous point on detection screen is now designated as recalls position, measures the distance, delta x recalled between position and initial bit;

5) presetting bit misalignment angle

Described θ is greater than the acute angle of 45 degree.

Described θ is within the scope of 60-80 °.

Compared with prior art, the invention has the beneficial effects as follows:

The presetting bit detection method of supervising device provided by the invention has easy to operate, wide adaptability and the feature such as effect is remarkable, it adopts illuminating module and the mode detecting screen oblique, mainly according to the nonlinear characteristic principle of tangent (tan) function in trigonometric function, namely (0, pi/2) in interval, the curvature of function increases along with the increase of angle, therefore by parallel with The Cloud Terrace top plan for laser module light beam, and ensure that laser beam has the angle of 60 ° ~ 80 ° with the screen detecting screen, so just can increase initial bit and recall the displacement residual quantity being embodied between position and detecting on screen, reach in the scope of detection system resolution distance, complete the detection of High Precision Monitor device to presetting bit deviation angle, improve adaptability and the accuracy of its detection system.

Embodiment

Below in conjunction with specific embodiment, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

First definition The Cloud Terrace is rotated counterclockwise the skew of direction generation is just, dextrorotation veer is negative, the moving direction on screen orientation is being detected for just accordingly, when the The Cloud Terrace time point that turns clockwise is negative detecting the moving direction on screen orientation when The Cloud Terrace is rotated counterclockwise time point.

Specific embodiment 1

The accuracy checking method of the supervising device of first embodiment of the invention, comprises the following steps, and first arranges a vertical detection screen in The Cloud Terrace front, and the horizontal range Y of itself and The Cloud Terrace is 4m,

Then a lasing fluorescence module is fixed at The Cloud Terrace upper horizontal, a presetting bit of The Cloud Terrace is selected to be designated as predetermined presetting bit, the light sent in the illuminating module described in this predetermined presetting bit can expose to and to detect on screen and the angle theta of light and detection screen is 70 °, and what namely described illuminating module sent is only slanted on detection screen;

After the above step is finished, illuminating module is exposed to the luminous point detected on screen and be designated as initial bit A, generally this luminous point is selected near place of detection screen center;

Then control to recall to predetermined presetting bit after The Cloud Terrace level rotates freely 90 °, because the precision reason of The Cloud Terrace, though programmed control its to get back to this predetermined presetting bit its accurately can not get back to this predetermined presetting bit, meeting deviation to some extent, deviation is reacted to detect on screen and namely occurs a new luminous point deviated with initial bit, a B is recalled in being designated as by the new light spot position detected on screen now, and measuring the distance, delta x recalled between position and initial bit is 5.97mm;

Presetting bit misalignment angle can be calculated by the above results

Embodiment 2

The accuracy checking method of the supervising device of second embodiment of the invention, comprises the following steps, and first arranges a vertical detection screen in The Cloud Terrace front, and the horizontal range Y of itself and The Cloud Terrace is 4m,

Then a lasing fluorescence module is fixed at The Cloud Terrace upper horizontal, select a predetermined presetting bit of The Cloud Terrace, the light sent in the illuminating module described in this presetting bit can expose to and to detect on screen and the angle theta of light and detection screen is 80 °, and what namely described illuminating module sent is only slanted on detection screen;

After the above step is finished, illuminating module is exposed to the luminous point detected on screen and be designated as initial bit A, generally this luminous point is selected near place of detection screen center;

Then control The Cloud Terrace level to rotate freely 80 ° and recall to this predetermined presetting bit, because the precision reason of The Cloud Terrace, though programmed control its to get back to this predetermined presetting bit its accurately can not get back to this predetermined presetting bit, meeting deviation to some extent, deviation is reacted to detect on screen and namely occurs a new luminous point deviated with initial bit, a B is recalled in being designated as by the new light spot position detected on screen now, and measuring the distance, delta x recalled between position and initial bit is 8.97mm;

Presetting bit misalignment angle can be calculated by the above results

Embodiment 3

The accuracy checking method of the supervising device of third embodiment of the invention, comprises the following steps, and first arranges a vertical detection screen in The Cloud Terrace front, and the horizontal range Y of itself and The Cloud Terrace is 4m,

Then a lasing fluorescence module is fixed at The Cloud Terrace upper horizontal, select a predetermined presetting bit of The Cloud Terrace, the light sent in the illuminating module described in this presetting bit can expose to and to detect on screen and the angle theta of light and detection screen is 60 °, and what namely described illuminating module sent is only slanted on detection screen;

After the above step is finished, illuminating module is exposed to the luminous point detected on screen and be designated as initial bit A, generally this luminous point is selected near place of detection screen center;

Then control to recall to this predetermined presetting bit after The Cloud Terrace level rotates freely-70 °, because the precision reason of The Cloud Terrace, though programmed control its to get back to this predetermined presetting bit its accurately can not get back to this predetermined presetting bit, meeting deviation to some extent, deviation is reacted to detect on screen and namely occurs a new luminous point deviated with initial bit, a B is recalled in being designated as by the new light spot position detected on screen now, and measuring the distance, delta x recalled between position and initial bit is-3.97mm;

Presetting bit misalignment angle can be calculated by the above results

The presetting bit detection method of supervising device provided by the invention has easy to operate, wide adaptability and the feature such as effect is remarkable, it adopts illuminating module and the mode detecting screen oblique, mainly according to the nonlinear characteristic principle of tangent (tan) function in trigonometric function, namely (0, pi/2) in interval, the curvature of function increases along with the increase of angle, therefore by parallel with The Cloud Terrace top plan for laser module light beam, and ensure that laser beam has the angle of 60 ° ~ 80 ° with the screen detecting screen, so just can increase initial bit and recall the displacement residual quantity being embodied between position and detecting on screen, reach in the scope of detection system resolution distance, complete the detection to High Precision Monitor device presetting bit deviation angle, improve adaptability and the accuracy of its detection system.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (2)

1. a detection method for the presetting bit of supervising device, is characterized in that, comprises the following steps,

1) arrange a vertical detection screen in The Cloud Terrace front, the horizontal range of itself and The Cloud Terrace is designated as Y;

2) fix an illuminating module at The Cloud Terrace upper horizontal, the light that described illuminating module sends can expose to and to detect on screen and the angle of light and detection screen is θ, and described θ is at 60 °-80 °;

3) control The Cloud Terrace and move to a predetermined presetting bit, and luminous point illuminating module exposed on detection screen is designated as initial bit;

4) control to recall to this predetermined presetting bit after The Cloud Terrace level rotates freely, the luminous point on detection screen is now designated as recalls position, measures the air line distance Δ x recalled between position and initial bit;

5) then presetting bit misalignment angle $\mathrm{\&psi;}=\arctan (\tan \mathrm{\&theta;}+\frac{\mathrm{\&Delta;X}}{Y})-\mathrm{\&theta;}.$

2. the detection method of the presetting bit of supervising device as claimed in claim 1, it is characterized in that, described illuminating module is laser module.