Method for judging distance between crane and power transmission line based on electric field intensity change rate
A technology of electric field strength and rate of change, applied in the field of measurement, can solve problems such as limitations, large data errors, and complex structures, and achieve the effect of improving safety
Pending Publication Date: 2022-07-22
湖北省超能电力有限责任公司
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Problems solved by technology
Since the electric field is distributed on the overhead transmission line, the distance between the boom and the transmission line can be judged by measuring the electric field intensity. Large interference, resulting in large data errors, and cannot accurately measure the distance
[0008] The closest prior art publication number is CN101825666B, a method for measuring the safe distance between the boom of the crane and the ultra-high voltage transmission line in operation. The detection method jointly determines the distance between the crane arm and the transmission line. This method is more accurate than using a single detection method, but there are complex measurement methods, inconvenient operation, and even limited by the limitations of the workplace.
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Embodiment 1
[0096] like figure 1 and figure 2 As shown, the experimental site is under the 110kV overhead transmission line, and the crane model is STC160E.
[0097] Step 1: As image 3 As shown in the figure, an electric field sensor 5 is installed on the top of the boom of the crane to measure the electric field intensity around the boom. , used to measure the height of the boom, its model is SW-LDS50A developed by Shendawei Company; figure 2 As shown in the figure, install inclinometer 2 on the side of the boom of the crane to measure the lifting angle of the boom - 1, using KAPRO inclinometer, model 393; For the angle, use HUICE's electronic digital angle ruler, model DP-180 360.
[0098] Step 2: Use the laser rangefinder 6 to measure the height of the boom and the horizontal plane, such as figure 2 As shown, the boom lifting direction 4 samples the height data at a sampling rate of 1M / s, calculates the height change of the boom in the vertical direction, and obtains the set ...
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The invention discloses a method for judging the distance between a crane and a power transmission line based on an electric field intensity change rate. The method comprises the following steps: installing an electric field sensor, a laser range finder, an inclinometer and an angle measuring instrument; measuring the height between the suspension arm of the crane and the horizontal plane through a laser range finder, and calculating the height variation of the suspension arm; the lifting angle of the suspension arm is measured through an inclinometer, the rotating angle of the suspension arm is measured through an angle measuring instrument, and the rotating angle variation of the suspension arm is calculated; the electric field intensity variation around the suspension arm is measured through an electric field sensor; calculating an electric field intensity change rate around the suspension arm; and judging the safety distance between the crane and the power transmission line through the obtained electric field intensity change rate. According to the method, the distance between the suspension arm and the power transmission line is judged according to the rule that the electric field intensity is attenuated along with increase of the distance, and the safety of crane operation and the safety level of overhead power transmission line operation can be effectively improved by measuring the change rate of the electric field intensity.
Description
technical field [0001] The invention relates to a method for judging the distance between a crane and a power transmission line, in particular to a method for judging the distance between a crane and a power transmission line based on the rate of change of electric field intensity, and belongs to the technical field of measurement. Background technique [0002] When the crane is constructed near the overhead transmission line, the operator cannot accurately judge the distance between the boom and the transmission line. Once the distance between the boom and the overhead transmission line is too close, a discharge breakdown accident is very likely to occur, which will cause great damage to the crane driver. It will also affect the safe and stable operation of the transmission line. [0003] The following four methods are usually adopted in the prior art: [0004] 1) Laser ranging method. Since the diameter of the overhead transmission line is a small target, the laser rangi...
Claims
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IPC IPC(8): G01B7/14G01R29/08G01B21/22G01C3/00G01C9/00
CPCG01B7/14G01C3/00G01C9/00G01B21/22G01R29/0878
Inventor 石一辉何剑峰王身丽山智涛冷伟明王飞王志高常亮程乾段鹏程绳李君彭迅
Owner 湖北省超能电力有限责任公司