Center positioning device and method

Abstract

The invention relates to a center positioning device and method, in particular to a positioning device capable of simply and quickly determining the center of an object, the positioning device comprises a telescopic assembly and a positioning assembly, and the positioning assembly is arranged on the telescopic assembly through a connecting table; the telescopic assembly is supported at the bottom of the connecting table, and the connecting table is further provided with a levelness tester used for determining levelness. The positioning assembly comprises a target seat, a target ball and a positioning ball, the target ball is provided with a cavity matched with the positioning ball, and the center of the target ball coincides with the center of the positioning ball; a groove is formed in the connecting table, and the target seat is connected into the groove. The center positioning method comprises the steps of obtaining the theoretical radius of the penetration piece, determining the center of the penetration piece through the center positioning device, and calculating a target sphere constant. According to the method, the tedious steps that a total station is used for taking multiple points of the penetration piece, then data of the total station is combed, and finally the center position of the penetration piece is obtained are not needed, and the center position of the penetration piece can be rapidly and accurately obtained.

Description

Technical Field

[0001] The present invention relates to a center positioning device and method, and in particular to a positioning device capable of simply and quickly determining the center of an object. Background Art

[0002] Mechanical and pipeline penetrations on the nuclear reactor containment are important components in the construction process of nuclear power plants. They need to be inspected before and during service and their positions need to be determined. To determine the position, it is usually necessary to first determine the center of the penetration to determine the exact position of the penetration. At present, when determining the center position of the penetration, it is necessary to manually perform point measurement using a total station, and then convert the total station data to finally obtain the center and exact position of the penetration. However, this positioning method not only has large errors, but also requires multi-point measurement, and has low efficiency and accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide a center positioning device and method, which solves the problem of complicated and low efficiency in positioning the center position of a penetration piece.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0005] A center positioning device comprises a telescopic component and a positioning component, wherein the positioning component is arranged on the telescopic component through a connecting platform; the telescopic component is supported at the bottom of the connecting platform, and a level tester for determining horizontality is also arranged on the connecting platform.

[0006] Furthermore, the positioning assembly includes a target seat, a target ball and a positioning ball. The target ball is provided with a cavity adapted to the positioning ball, and the center of the target ball coincides with the center of the positioning ball. The connecting platform is provided with a groove, and the target seat is connected in the groove.

[0007] Furthermore, there are three telescopic components in total, which are evenly arranged along the circumference of the connecting platform, and each telescopic component is placed parallel to the horizontal plane; the telescopic components include a kit and a leg, the kit is sleeved on the outside of the leg, and the leg is hinged on the connecting platform; the kit is provided with a long hole, and the leg is provided with a bolt hole, and the leg is connected to the long hole of the kit through a fixing part.

[0008] Furthermore, the fixing member includes a bolt and a nut, the bolt is located on one side of the supporting leg, and the nut is located on the other side of the supporting leg, and the bolt is adapted to the nut.

[0009] Furthermore, each of the legs is marked with a scale, and the bolt is provided with a pointer for indicating the scale.

[0010] Furthermore, the level tester comprises an offset area and a horizontal area, and the offset area is located on both sides of the horizontal area.

[0011] A center positioning method, comprising:

[0012] S1 sets measurement reference points in the penetration installation area, and the coordinates of the measurement reference points include plane position and elevation;

[0013] S2 uses a total station to measure the coordinates of the reference points for station orientation and unify the coordinate system;

[0014] S3 obtains the theoretical radius of the penetration;

[0015] S4 determines the center of the penetration piece by using a center positioning device;

[0016] S5 calculates the target sphere constant;

[0017] Select point A and point C on a flat ground. Point C is the backsight point of point A. Set up a tripod at point C and use the nadir instrument to center it. Adjust the total station to a horizontal level. Select any point B between points A and C so that points A, B, and C are in a straight line.

[0018] Place the prism and target ball at points B and C respectively, and measure the horizontal distance between AB to be S AB测 , horizontal distance S between AC AC测 , place the total station at point C and measure the horizontal distance S between BC BC测 , assuming that the actual horizontal distance between AC is S AC , the actual distance between AB is S AB , the distance between BC is SBC, the same prism and target ball are used in the ranging process, and the three meteorological corrections of air pressure, temperature and humidity are performed in the instrument, the error caused by meteorological conditions is ignored, and the target ball constant is assumed to be K:

[0019] S AB测 =S AB +K;S AC测 =S AC +K;S BC测 =S BC +K;

[0020] Arranged:

[0021] S AB测 =(S AB测 +S BC测 );S AC +K=S AB +K+S BC +K;

[0022] Simplified:

[0023] K=S AC -(S AB +S BC );

[0024] S6 uses a total station to measure the three-dimensional coordinates of the center of the target sphere.

[0025] S4 includes adjusting the length of the telescopic assembly so that the telescopic assembly fits on the inner wall of the penetration piece, observing the level tester on the connecting table, and after confirming that the connecting table is in a horizontal state at this time, locating the center position of the assembly, that is, the center position of the penetration piece.

[0026] Determining that the connection platform is in a horizontal state at this time includes that bubbles are set in the medium in the level tester, and the offset area and the horizontal area are made of transparent materials to facilitate observation of the bubble position;

[0027] First, make the pointer of each bolt indicate the same scale, and then observe whether the bubble in the level tester is in the horizontal area. If it is in the horizontal area, it proves that the connecting platform is now in a horizontal state. If the bubble is in the offset area, adjust the legs until the bubble is in the horizontal area, that is, the connecting platform is in a horizontal state.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] The present invention enables the bottom end of the leg to adapt to penetrations of different radii by moving the legs in the kit. When three legs of the same length are attached to the top surface of the penetration and three bolts are attached to the inner wall of the penetration at the same time, the center position of the center ball is the center position of the penetration, and the position of the penetration can be determined. The present invention does not need to use a total station to take multiple points on the penetration, and then sort out the total station data to finally obtain the cumbersome steps of the center position of the penetration, and can quickly and accurately obtain the center position of the penetration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a center positioning device.

[0031] Figure 2 It is a schematic diagram of a center positioning device and a penetration piece.

[0032] Figure 3 A schematic diagram of the positioning component.

[0033] Figure 4 A schematic diagram of a telescopic component. DETAILED DESCRIPTION

[0034] Example 1

[0035] like Figure 1 and Figure 2As shown, a center positioning device includes a telescopic component and a positioning component, wherein the positioning component is arranged on the telescopic component through a connecting platform 1; the telescopic component is supported at the bottom of the connecting platform 1, and a level tester 2 for determining the horizontality is also provided on the connecting platform 1. At present, the method for determining the center position of the through-piece 3 is not only cumbersome in steps, but also has large errors, resulting in failure to obtain valid data. When determining the center position of the through-piece 3, the present invention first adjusts the length of the telescopic component so that the telescopic component is respectively attached to the top surface of the through-piece 3, and then observes the level tester 2 located on the connecting platform 1 to determine the horizontality of the connecting platform 1 at this time. After determining that the connecting platform 1 is in a horizontal state at this time, the center position of the positioning component is the center position of the through-piece 3.

[0036] like Figure 3 As shown, the positioning assembly includes a target seat 11, a target ball 12 and a positioning ball 13. The target ball 12 is provided with a cavity adapted to the positioning ball 13, and the center of the target ball 12 coincides with the center of the positioning ball 13. The connecting platform 1 is provided with a groove, and the target seat 11 is connected in the groove. The center of the groove is in line with the center of the connecting platform 1, the target seat 11 is adapted to the groove, the center of the target seat 11 is in line with the center of the groove, the center of the target ball 12 is in line with the center of the target seat 11, and the center of the target ball 12 coincides with the center of the positioning ball 13. It can be seen that the center of the positioning ball 13 is in line with the center of the penetration member 3, so the center position of the penetration member 3 can be known, and the specific position of the penetration member 3 can be determined based on this.

[0037] like Figure 4As shown, there are three telescopic assemblies in total, and the telescopic assemblies are evenly arranged along the circumference of the connecting platform 1, and each telescopic assembly is placed horizontally with the horizontal plane; the telescopic assembly includes a set 21 and a leg 22, the set 21 is sleeved on the outside of the leg 22, and the leg 22 is hinged on the connecting platform 1; the set 21 is provided with a long hole 23, and the leg 22 is provided with a bolt hole, and the leg 22 is connected to the long hole 23 of the set 21 through a fixing member. The fixing member includes a bolt 24 and a nut 25, the bolt 24 is located on one side of the leg 22, and the nut 25 is located on the other side of the leg 22, and the bolt 24 is adapted to the nut 25. The position of the leg 22 in the set 21 is controlled by adjusting the bolt 24, and the position of each leg 22 is ensured to be the same, and the bolt 24 is abutted against the inner wall of the penetration member 3. The positioning assembly is more stable through three-point support, and the measured result is more accurate. Each leg 22 is marked with a scale, and a pointer 26 for indicating the scale is provided on the bolt 24. First, make the pointer 26 of each bolt 24 point to the same scale. The level tester 2 includes an offset area and a horizontal area, and the offset area is located on both sides of the horizontal area. Bubbles are set in the medium in the level tester 2, and the offset area and the horizontal area are made of transparent materials, which is convenient for observing the position of the bubbles. Then observe whether the bubbles in the level tester 2 are located in the horizontal area. If they are located in the horizontal area, it proves that the connecting platform 1 is now in a horizontal state. If the bubbles are located in the offset area, it is necessary to adjust the position of the penetration 3 until the bubbles are located in the horizontal area, that is, the connecting platform 1 is in a horizontal state.

[0038] Example 2

[0039] A center positioning method, comprising:

[0040] S1 arranges measurement reference points in the installation area of ​​the penetration 3, and the coordinates of the measurement reference points include plane position and elevation;

[0041] S2 uses a total station to measure the coordinates of the reference points for station orientation and unify the coordinate system;

[0042] S3 obtains the theoretical radius of penetration 3;

[0043] S4 determines the center of the penetration member 3 by using a center positioning device;

[0044] S5 calculates the target ball 12 constant;

[0045] Select point A and point C on a flat ground. Point C is the backsight point of point A. Set up a tripod at point C and use the nadir instrument to center it. Adjust the total station to a horizontal level. Select any point B between points A and C so that points A, B, and C are in a straight line.

[0046] Place the prism and target ball 12 at points B and C respectively, and measure the horizontal distance between AB to be S AB测 , horizontal distance S between ACAC测 , place the total station at point C and measure the horizontal distance S between BC BC测 , assuming that the actual horizontal distance between AC is S AC , the actual distance between AB is S AB , the distance between BC is SBC, the same prism and target ball 12 are used in the ranging process, and the three meteorological corrections of air pressure, temperature and humidity are performed in the instrument, and the error caused by meteorological conditions is ignored. It is assumed that the constant of the target ball 12 is K:

[0047] S AB测 =S AB +K;S AC测 =S AC +K;S BC测 =S BC +K;

[0048] Arranged:

[0049] S AB测 =(S AB测 +S BC测 );S AC +K=S AB +K+S BC +K;

[0050] Simplified:

[0051] K=S AC -(S AB +S BC );

[0052] S6 uses a total station to measure the three-dimensional coordinates of the center of the target sphere 12.

[0053] S4 includes adjusting the length of the telescopic assembly so that the telescopic assembly fits on the inner wall of the penetration piece 3 respectively, observing the level tester 2 located on the connecting platform 1, and after determining that the connecting platform 1 is in a horizontal state at this time, the center position of the positioning assembly, that is, the center position of the penetration piece.

[0054] Determining that the connection platform 1 is in a horizontal state at this time includes that bubbles are set in the medium in the level tester 2, and the offset area and the horizontal area are made of transparent materials to facilitate observation of the bubble position;

[0055] First, make the pointer of each bolt indicate the same scale, and then observe whether the bubble in the level tester 2 is in the horizontal area. If it is in the horizontal area, it proves that the connecting platform 1 is now in a horizontal state. If the bubble is in the offset area, adjust the penetration piece 3 until the bubble is in the horizontal area, that is, the connecting platform 1 is in a horizontal state.

[0056] In nuclear power construction, measurement belongs to the category of precision measurement, and distance measurement is one of the important indicators. At present, high-precision measuring equipment such as TS60 is often selected to improve accuracy, but distance measurement is often affected by many factors. In addition to correct meteorological corrections (air pressure, temperature, humidity) and instrument constant corrections in daily operations. The prism constant correction should also be added to the measured distance. The instruments used in the project include laser trackers, total stations TS60, total stations TZ12, and total stations TCR1201+. The target spheres and circular prism constants used with them are nominally 0.0mm. However, in the actual construction process, due to the limited or special working environment, it is impossible to set up a prism tripod. The total station is required to cooperate with the target sphere to complete the measurement work. Therefore, it is necessary to perform constant corrections on it to find out the true constant of the target sphere.

[0057] In order to prevent errors or other accidental errors, the circular prism and the target ball are measured and calculated to obtain the target ball. At a temperature of 32°C, an air pressure of 1008mbar, and a humidity of 65%, the coordinate values ​​of the Leica circular prism and the spherical prism are compared, and the circular prism constant is -0.6mm, and the target ball constant is 34.4mm; in order to verify the correctness of the target ball constant, the total station needs to set the absolute constant to 0.0mm and the Leica constant to 34.4mm when adding the target ball. The distance from point B to point C is measured, and the result is circular prism-target ball = 0.5mm. This proves that when the total station cooperates with the target ball for measurement, the absolute constant of the target ball is 0.0mm and the Leica constant is 34.4mm.

[0058] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A center positioning device, characterized in that: It comprises a telescopic component and a positioning component. The positioning component is arranged on the telescopic component through a connecting platform. The telescopic component is supported at the bottom of the connecting platform. A level tester for determining the horizontality is also arranged on the connecting platform.

2. A center positioning device according to claim 1, characterized in that: The positioning assembly comprises a target seat, a target ball and a positioning ball. The target ball is provided with a cavity matched with the positioning ball, and the center of the target ball coincides with the center of the positioning ball. The connecting platform is provided with a groove, and the target seat is connected in the groove.

3. A center positioning device according to claim 1, characterized in that: There are three telescopic components in total, which are evenly arranged along the circumference of the connecting platform, and each telescopic component is placed parallel to the horizontal plane; the telescopic components include a kit and a leg, the kit is sleeved on the outside of the leg, and the leg is hinged on the connecting platform; the kit is provided with a long hole, and the leg is provided with a bolt hole, and the leg is connected to the long hole of the kit through a fixing piece.

4. A center positioning device according to claim 3, characterized in that: The fixing member comprises a bolt and a nut, wherein the bolt is located on one side of the supporting leg and the nut is located on the other side of the supporting leg, and the bolt is matched with the nut.

5. A center positioning device according to claim 4, characterized in that: Each of the legs is marked with scales, and a pointer for indicating the scales is provided on the bolt.

6. A center positioning device according to claim 1, characterized in that: The level tester comprises an offset area and a horizontal area, wherein the offset area is located at both sides of the horizontal area.

7. A center positioning method, characterized in that: include: S1 sets measurement reference points in the penetration installation area, and the coordinates of the measurement reference points include plane position and elevation; S2 uses a total station to measure the coordinates of the reference points for station orientation and unify the coordinate system; S3 obtains the theoretical radius of the penetration; S4 determines the center of the penetration piece by a center positioning device according to any one of claims 1 to 6; S5 calculates the target sphere constant; Select point A and point C on a flat ground. Point C is the backsight point of point A. Set up a tripod at point C and use the nadir instrument to center it. Adjust the total station to a horizontal level. Select any point B between points A and C so that points A, B, and C are in a straight line. Place the prism and target ball at points B and C respectively, and measure the horizontal distance between AB to be S AB测 , horizontal distance S between AC AC测 , place the total station at point C and measure the horizontal distance S between BC BC测 , assuming that the actual horizontal distance between AC is S AC , the actual distance between AB is S AB , the distance between BC is SBC, the same prism and target ball are used in the ranging process, and the three meteorological corrections of air pressure, temperature and humidity are performed in the instrument, the error caused by meteorological conditions is ignored, and the target ball constant is assumed to be K: S AB测 =S AB +K;S AC测 =S AC +K;S BC测 =S BC +K; Arranged: S AB测 =(S AB测 +S BC测 );S AC +K=S AB +K+S BC +K; Simplified: K=S AC -(S AB +S BC ); S6 uses a total station to measure the three-dimensional coordinates of the center of the target sphere.

8. A center positioning method according to claim 9, characterized in that: S4 includes adjusting the length of the telescopic assembly so that the telescopic assembly fits on the inner wall of the penetration piece, observing the level tester on the connecting table, and after confirming that the connecting table is in a horizontal state at this time, locating the center position of the assembly, that is, the center position of the penetration piece.

9. A center positioning method according to claim 8, characterized in that: Determining that the connection platform is in a horizontal state at this time includes that bubbles are set in the medium in the level tester, and the offset area and the horizontal area are made of transparent materials to facilitate observation of the bubble position; First, make the pointer of each bolt indicate the same scale, and then observe whether the bubble in the level tester is in the horizontal area. If it is in the horizontal area, it proves that the connecting platform is now in a horizontal state. If the bubble is in the offset area, adjust the legs until the bubble is in the horizontal area, that is, the connecting platform is in a horizontal state.

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