Method for detecting deflection angle of vertical plane

Abstract

The invention discloses a method for detecting a deflection angle of a vertical plane. The method comprises the following steps: S1, determining the vertical plane; s2, installing a double-laser sensor; s3, adjusting the double laser sensors; and S4, measuring a vertical plane deflection angle. According to the invention, a non-contact measurement method is adopted, so that a vertical plane needing to be measured is not damaged; the problem that a traditional laser ranging method cannot ensure that a laser ranging line is perpendicular to a vertical plane zero position is solved; operation steps are simplified, and the distance from the distance measurement center to the vertical plane rotation center does not need to be measured.

Description

Technical Field

[0001] The invention belongs to the technical field of laser detection, and in particular relates to a method for detecting a vertical plane deflection angle. Background Art

[0002] Commonly used angle sensors are sensitive to the direction of gravity and can be used to measure the deflection angle of the horizontal plane. However, the vertical plane is parallel to the direction of gravity and the deflection angle of the vertical plane cannot be measured by this sensor. Currently, most methods used to measure the deflection angle of the vertical plane use laser ranging methods.

[0003] According to the distance difference between the initial position and the current position of the vertical plane, and the distance between the laser ranging line and the rotation axis, the rotation angle is calculated using trigonometric functions, such as Figure 1 As shown in the figure, before starting the measurement, the laser sensor needs to be fixed relative to the vertical plane and the distance y from the laser sensor's distance measurement center to the vertical plane's rotation center is measured. The vertical plane is returned to zero position, and the laser sensor measures the distance d0 to the vertical plane at this time. The vertical plane rotates toward the laser sensor by an angle α, and the laser sensor measures the distance d1 to the vertical plane at this time. Figure 1 It can be seen that , define the clockwise rotation of the vertical plane as positive and the counterclockwise rotation as negative.

[0004] Since the laser distance measurement method does not directly contact the vertical surface, there is no risk of damaging or destroying the vertical surface. However, the installation angle of the laser sensor needs to ensure that the laser distance measurement line and the vertical surface zero position are perpendicular to each other. If they are not perpendicular, a large measurement error will be introduced, such as Figure 2 As shown in the figure, the installation error causes an angle error between the actual laser distance measurement line and the correct distance measurement line. , at this time the difference between the two distances of the vertical plane is , using the formula There is a certain error in the calculated deflection angle.

[0005] Therefore, each time the sensor is installed, it is necessary to measure the distance y from the laser sensor ranging center to the vertical plane rotation center, which makes the measurement steps more cumbersome, and the measurement error introduced during the distance measurement will ultimately affect the calculation of the deflection angle. Therefore, the existing laser ranging method cannot ensure that the laser ranging line and the vertical plane zero position are perpendicular to each other, and the distance from the laser ranging center to the vertical plane rotation center needs to be measured after each installation.

[0006] Therefore, it is urgent to design a method for detecting the deflection angle of the vertical plane to solve the above-mentioned problem that the laser ranging line and the vertical plane zero position cannot be guaranteed to be perpendicular to each other and the distance from the laser ranging center to the vertical plane rotation center needs to be measured after each installation. Summary of the invention

[0007] In order to solve the technical problems mentioned in the background technology that the laser ranging line and the vertical plane zero position cannot be guaranteed to be perpendicular to each other and the distance from the laser ranging center to the vertical plane rotation center needs to be measured after each installation, a method for detecting the deflection angle of the vertical plane is provided to solve the above problems.

[0008] To achieve the above object, the specific technical solution of the method for detecting the vertical plane deflection angle of the present invention is as follows: A method for detecting a vertical plane deflection angle comprises the following steps: S1. Determine the vertical plane; S2, install dual laser sensors; S3, adjust the dual laser sensors; S4. Measure the vertical deflection angle.

[0009] Further, in S2, the dual laser sensor includes a first laser and a second laser, and both the first laser and the second laser are irradiated on a vertical plane.

[0010] Furthermore, the first laser light and the second laser light have different wavelengths.

[0011] Further, in S2, the dual laser sensors are connected to a data processing host to send the measurement data to the data processing host.

[0012] Furthermore, the dual laser sensor is connected to the data processing host via a wired or wireless connection.

[0013] Further, in S3, the vertical plane is fixed at the zero position before adjusting the dual laser sensors.

[0014] Further, when the distance to the vertical plane measured by the first laser is equal to the distance to the vertical plane measured by the second laser, the dual laser sensors are fixed to complete the adjustment.

[0015] Further, in S4, the vertical plane deflection angle is obtained by using the distance data to the vertical plane measured by the first laser and the distance data to the vertical plane measured by the second laser.

[0016] Furthermore, the measurement formula of the vertical plane deflection angle is: ; in, is the vertical deflection angle, When it is positive, the vertical plane rotates clockwise. When it is negative, the vertical plane rotates in the counterclockwise direction; is the distance to the vertical plane measured by the first laser after the vertical plane is deflected; is the distance to the vertical plane measured by the second laser after the vertical plane is deflected; is the distance between the first laser and the second laser.

[0017] The method for detecting the deflection angle of a vertical plane of the present invention has the following advantages: the present invention adopts a non-contact measurement method and will not cause damage to the vertical plane to be measured; it improves the problem that the traditional laser ranging method cannot ensure that the laser ranging line and the vertical plane zero position are perpendicular to each other; the operation steps are simplified, and there is no need to measure the distance y from the ranging center to the vertical plane rotation center, which also improves the problem of introducing the influence of measurement errors when measuring the distance, and multiple dual laser sensors can be used for simultaneous measurement to detect the deflection angle data of multiple vertical planes at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The schematic diagram of the existing laser ranging method for measuring the vertical plane deflection angle; Figure 2 A schematic diagram of the angle error of the existing laser ranging method is provided; Figure 3 It is a flow chart of the method for detecting the vertical plane deflection angle of the present invention; Figure 4 It is a principle diagram of a method for detecting a vertical plane deflection angle of the present invention; Figure 5 It is a schematic diagram of the practical application of the present invention.

[0019] Explanation of the markings in the figure: 1. Laser sensor; 2. Dual laser sensors; 21. First laser; 22. Second laser; 3. Vertical plane; 4. Data processing host; 5. Vertical plane deflection axis and controller. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0022] Please refer to the attached Figure 1 To Attachment Figure 5 The method for detecting the vertical plane deflection angle of the present invention is described.

[0023] The existing laser distance measurement method cannot ensure that the laser distance measurement line and the zero position of the vertical plane 3 are perpendicular to each other, and the distance from the laser distance measurement center to the rotation center of the vertical plane 3 needs to be measured after each installation.

[0024] Therefore, the present invention provides a method for detecting the deflection angle of a vertical plane 3, such as Figure 3 and Figure 5 As shown, the following steps are included: S1, determine the vertical plane 3; S2. Install the dual laser sensor 2; the dual laser sensor 2 includes a first laser 21 and a second laser 22, both of which are irradiated on the vertical plane 3, thereby ensuring that both the first laser 21 and the second laser 22 can measure the distance to the vertical plane 3; the wavelengths of the first laser 21 and the second laser 22 are different, thereby avoiding the mutual influence of the two laser beams; the dual laser sensor 2 is connected to the data processing host 4 to send the measurement data to the data processing host 4, and the dual laser sensor 2 is connected to the data processing host 4 by wire or wireless. The specific connection method is determined according to the actual use scenario. The wired connection state has better anti-interference ability, and the wireless connection state is faster and more convenient without the constraints of cables.

[0025] S3, adjust the dual laser sensor 2; before adjusting the dual laser sensor 2, fix the vertical plane 3 at zero position. When the distance to the vertical plane 3 measured by the first laser 21 is equal to the distance to the vertical plane 3 measured by the second laser 22, fix the dual laser sensor 2 to complete the adjustment; Figure 4 As shown, when the vertical plane 3 is at zero position, the distance measured by the first laser 21 is d0, and the distance measured by the second laser 22 is d0'. When d0=d0', the dual laser sensor 2 is installed and fixed. At this time, the distance measurement lines of the first laser 21 and the second laser 22 are perpendicular to the zero position of the vertical plane 3, which improves the problem that the traditional laser ranging method cannot ensure that the laser distance measurement line is perpendicular to the zero position of the vertical plane 3.

[0026] S4, measuring the deflection angle of the vertical plane 3; the deflection angle of the vertical plane 3 is obtained by the distance data to the vertical plane 3 measured by the first laser 21 and the distance data to the vertical plane 3 measured by the second laser 22. Specifically, Figure 4 As shown, the data measured by the first laser 21 and the second laser 22 are applied to the angle measurement formula of the laser ranging method, and the definition is is the deflection angle of the vertical plane 3, When is positive, the vertical plane 3 rotates clockwise. When it is negative, the vertical plane 3 rotates counterclockwise, and we can get: ; ; ; because is a monotonic function, so we can get: ; ; Right now ; The measurement formula of the dual laser ranging method for measuring the 3 deflection angles of the vertical plane can be obtained: ; in, is the distance to the vertical plane 3 measured by the first laser 21 after the vertical plane 3 is deflected; is the distance to the vertical plane 3 measured by the second laser 22 after the vertical plane 3 is deflected; is the distance between the first laser 21 and the second laser 22. In a dual laser sensor, this distance is a fixed known quantity.

[0027] According to the measurement formula of the dual laser ranging method, when using this method to measure the deflection angle, only the ranging data of the first laser 21 and the second laser 22 are needed. It is no longer necessary to measure the distance y from the distance measurement center to the rotation center of the vertical plane 3, which simplifies the operation steps and also improves the problem of introducing measurement error when measuring the distance.

[0028] When the present invention is used to measure the deflection of the vertical plane 3, the dual laser sensor 2 is installed at an appropriate position facing the middle of the vertical plane 3 through a clamp. There is no need to fix the sensor to the vertical plane 3, which can avoid the sensor falling off during the test due to the shaking of the vertical plane 3 and other reasons, causing damage to the tested product.

[0029] As a preferred example, Figure 5 As shown, in a specific embodiment, the data processing host 4 is connected to the dual laser sensor 2 by wire, and the deflection angles of two vertical planes 3 can be measured simultaneously at one time.

[0030] The present invention adopts a contactless measurement method and will not cause damage to the vertical surface 3 to be measured; it improves the problem that the traditional laser ranging method cannot ensure that the laser ranging line and the zero position of the vertical surface 3 are perpendicular to each other; it simplifies the operation steps, and there is no need to measure the distance y from the ranging center to the rotation center of the vertical surface 3, and it also improves the problem of introducing measurement error when measuring the distance, and multiple dual laser sensors 2 can be used for simultaneous measurement, and the deflection angle data of multiple vertical surfaces 3 can be detected at the same time.

[0031] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for detecting a vertical plane deflection angle, characterized in that: The following steps are involved: S1. Determine the vertical plane; S2, install dual laser sensors; S3, adjust the dual laser sensors; S4. Measure the vertical deflection angle.

2. The method for detecting a vertical plane deflection angle according to claim 1, characterized in that: In S2, the dual laser sensor includes a first laser and a second laser, and both the first laser and the second laser are irradiated on a vertical plane.

3. The method for detecting a vertical plane deflection angle according to claim 2, characterized in that: The first laser light and the second laser light have different wavelengths.

4. The method for detecting a vertical plane deflection angle according to claim 2, characterized in that: In S2, the dual laser sensors are connected to a data processing host to send measurement data to the data processing host.

5. The method for detecting a vertical plane deflection angle according to claim 4, characterized in that: The dual laser sensors are connected to the data processing host via a wired or wireless method.

6. The method for detecting a vertical plane deflection angle according to claim 2, characterized in that: In S3, fix the vertical plane at zero position before adjusting the dual laser sensors.

7. The method for detecting a vertical plane deflection angle according to claim 6, characterized in that: When the distance to the vertical plane measured by the first laser is equal to the distance to the vertical plane measured by the second laser, the dual laser sensors are fixed to complete the adjustment.

8. The method for detecting a vertical plane deflection angle according to claim 1, characterized in that: In S4 , the vertical plane deflection angle is obtained by using the distance data to the vertical plane measured by the first laser and the distance data to the vertical plane measured by the second laser.

9. The method for detecting a vertical plane deflection angle according to claim 8, characterized in that: The measurement formula for the vertical deflection angle is: ； in, is the vertical deflection angle, When it is positive, the vertical plane rotates clockwise. When it is negative, the vertical plane rotates in the counterclockwise direction; is the distance to the vertical plane measured by the first laser after the vertical plane is deflected; is the distance to the vertical plane measured by the second laser after the vertical plane is deflected; is the distance between the first laser and the second laser.

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