CN110926322A - Portable power transmission and distribution line sag detection device - Google Patents
Portable power transmission and distribution line sag detection device Download PDFInfo
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- CN110926322A CN110926322A CN201910944092.1A CN201910944092A CN110926322A CN 110926322 A CN110926322 A CN 110926322A CN 201910944092 A CN201910944092 A CN 201910944092A CN 110926322 A CN110926322 A CN 110926322A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention provides a portable power transmission and distribution line sag detection device which comprises a handheld terminal, a positioning unit, a power supply unit and a wireless unit, wherein the power supply unit is in power supply connection with the handheld terminal, the power supply unit is in power supply connection with the positioning unit, the positioning unit is in wireless connection with the handheld terminal through the wireless unit, and a detection module is arranged on the positioning unit. The invention adopts the combination of the portable tripod and the space measurement technology, can accurately calculate the maximum sag and display the maximum sag in real time, and meanwhile, the measurement device is convenient to store and carry after the measurement is finished.
Description
Technical Field
The invention relates to the technical field of electric wire detection, in particular to a portable power transmission and distribution line sag detection device.
Background
The conductor sag of the overhead transmission line is an important parameter for reflecting the safe operation of the line and is one of the state quantities of which the monitoring and dynamic capacity increase of the transmission line need to pay important attention. In order to ensure the safe operation of the power transmission line, the measurement of the sag of the wire is very important at home and abroad.
The traditional sag measurement method mainly comprises the following steps: the sag plate observation method is divided into a parallelogram method and an asynchronous method, mainly uses a theodolite to be matched with a scale or a telescope to be matched with a sag plate, and is completed through angle measurement, visual distance measurement and telescope vision estimation sag plate reading, the precision of the sag plate observation method is greatly influenced by angle measurement and vision estimation reading, the measurement process is complex, and the calculation process is long. It is therefore a necessary requirement to propose new measurement methods. In recent years, researchers at home and abroad have conducted a great deal of research on the sag measurement method. Several more sophisticated measurement methods have also been developed.
Chinese patent CN108955609A, entitled "overhead cable sag calculation method and device", performs temperature field simulation on an overhead cable to obtain radial temperature field distribution of the overhead cable under the environmental condition; obtaining the highest temperature in the radial temperature field distribution, and calculating the current stress of the overhead cable at the highest temperature according to the highest temperature; and carrying out sag calculation according to the current stress to obtain a sag value of the overhead cable. The nature is measured by measuring stress, the temperature changes in real time, and the highest temperature also changes instantaneously, so that the measured highest temperature has errors, and the calculated stress value is not accurate enough, so that the sag detection result is inaccurate.
Disclosure of Invention
The invention solves the problem of inaccurate sag detection results in the prior art, and provides a portable sag detection device for a power transmission and distribution line.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a portable power transmission and distribution lines sag detection device, includes handheld terminal, positioning unit, power supply unit and wireless unit, and power supply unit is connected with handheld terminal power supply, and power supply unit is connected with the positioning unit power supply, and positioning unit passes through wireless unit and handheld terminal wireless connection, be equipped with detection module on the positioning unit.
The positioning unit detects spatial position information and transmits the spatial position information to the handheld terminal through the wireless unit, the handheld terminal calculates the spatial position information to obtain a maximum sag, the maximum sag is displayed on the handheld terminal, the power supply unit supplies power to the handheld terminal and the positioning unit respectively, the positioning unit is not affected by temperature when detecting the spatial position information, and the distance between detection points is measured through the sensor, so that the positioning unit is accurate and convenient; the detection module is used for detecting the relative position relation between the detection points and reducing the measurement error.
Preferably, the positioning unit further comprises a sliding module and an indoor positioning UWB module, the sliding module is sleeved on the power transmission and distribution line to be detected, the indoor positioning UWB module comprises a base station and a tag, the base station is fixed on a support, the support abuts against the power pole, the tag is fixed on the sliding module, and the detection module is fixed on the base station.
The one side of slip module and the electric line contact that awaits measuring is smooth, and the slip module can slide the arc of the electric line that awaits measuring and hang down the lowest department by oneself, and indoor location UWB module is surveyed the check point and is surveyed the range, and in 2 check points, a check point is fixed with the basic station, and another check point is fixed with the label, and the basic station detects the distance of label and self and is the distance between 2 check points promptly, and indoor location UWB module is surveyed the range accuracy and is responded soon, helps accurately measuring the biggest arc with high efficiency and hangs down.
Preferably, the support is a folding tripod support which comprises a support body and a foot stand, the maximum height of the support body after being extended is 0-10cm higher than the height of the telegraph pole, and the base station is fixed at the top end of the support body. The tripod supports steadily and conveniently accomodates and carries, and the tripod is through the straightness that hangs down of the length adjustment pole body of adjusting each foot rest. Because the height of one detection point is consistent with the height of a connection part of a telegraph pole and an electric wire, the detection points are detected by a base station, and the base station is fixed at the top end of the pole body, the maximum extended height of the pole body is at least consistent with the height of the telegraph pole, an installation space is required to be reserved between the pole body and the base station, and the maximum extended height of the pole body is 10cm higher than the height of the telegraph pole.
Preferably, the indoor positioning UWB module is provided with 3 base stations and 3 tags, and the indoor positioning UWB module comprises a base station a, a base station B, a base station C, a tag a, a tag B and a tag C, wherein the base station a and the tag a are fixed on the sliding module, the base station B and the tag B are fixed at the top end of the rod body, and the base station C and the tag C are fixed at the joint of the rod body and the foot stool of the support.
Preferably, the base station A measures the distance between the base station A and the label b and the distance between the base station A and the label c; the base station B measures the distance between the base station B and the label a and the distance between the base station B and the label c; and the base station C measures the distance between the base station C and the label a and the distance between the base station C and the label b. When 3 detection points exist, 3 base stations and 3 labels are installed, each detection point is provided with one base station and one label, each base station detects the distance between the labels of the other 2 detection points and the base station, therefore, the distance between each 2 detection points is measured for 2 times, and the handheld terminal takes 2 times of measurement and takes an average value as a space calculation initial value.
Preferably, the sliding module is provided with a pulley. The pulley is the concave type wheel, has the recess, and the survey line card is put in the recess, and the effect of pulley is to change sliding friction into rolling friction, reduces frictional force, is favorable to the sliding module to arrive the minimum of survey line arc, reduces measuring error.
Preferably, the pulley is provided with a power-assisted motor, when the arc of the measured wire is small and the pulley is difficult to roll by the gravity of the pulley, the power-assisted motor can provide power at an initial speed to enable the pulley to roll, and the power-assisted motor is wirelessly controlled by the handheld terminal.
Preferably, the handheld terminal comprises a human-computer interaction module and a processing module, the processing module is in wireless connection with the positioning unit through a wireless unit, and the human-computer interaction module is in signal connection with the processing module.
The processing module receives the space position information transmitted by the base station through the wireless unit and generates the maximum sag, and the man-machine interaction module displays the maximum sag.
Preferably, the power supply unit comprises a battery management module and a power supply module, the power supply module supplies power to the processing module and the positioning unit, the battery management module manages the power supply of the processing module and the positioning unit, and the battery management module charges and discharges the power supply and controls the on-off of the power supply.
The invention has the following beneficial effects: (1) the distance between detection points is measured by adopting an indoor positioning UWB module, so that the temperature influence is avoided, and the measurement is accurate and rapid; (2) the indoor positioning UWB module is fixed on the tripod, so that the storage and carrying are convenient; (3) the sliding module is provided with a pulley and a power-assisted motor, and can accurately measure when the arc of the measured wire is relatively small.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present embodiment.
Fig. 2 is a measurement diagram of the present embodiment.
Wherein: 1. hand-held terminal 2, positioning unit 3, power supply unit 4, wireless unit 5, processing module 6, human-computer interaction module 7, power supply module 8, battery management module 9, base station A10, base station B11, base station C12, label a 13, note B14, label C15 and sliding module
Detailed Description
Example (b):
this embodiment provides a portable power transmission and distribution lines sag detection device, refer to fig. 1, including handheld terminal 1, positioning unit 2, power supply unit 3 and wireless unit 4, power supply unit 3 is connected with handheld terminal 1 power supply, and power supply unit 3 is connected with the power supply of positioning unit 2, and positioning unit 2 passes through wireless unit 4 and handheld terminal 1 wireless connection, is equipped with detection module on the positioning unit 2. The wireless unit model is ATK-LORA-01.
The positioning unit detects spatial position information and transmits the spatial position information to the handheld terminal through the wireless unit, the handheld terminal calculates the spatial position information to obtain a maximum sag, the maximum sag is displayed on the handheld terminal, the power supply unit supplies power to the handheld terminal and the positioning unit respectively, the positioning unit is not affected by temperature when detecting the spatial position information, and the distance between detection points is measured through the sensor, so that the positioning unit is accurate and convenient; the detection module is used for detecting the relative position relation between the detection points and reducing the measurement error.
The positioning unit 2 further comprises a sliding module 15 and an indoor positioning UWB module, the model of the indoor positioning UWB module is DWPA1000, the sliding module 15 is sleeved on the power transmission and distribution line to be detected, the indoor positioning UWB module comprises a base station and a label, the base station is fixed on a support, the support is close to a telegraph pole, the label is fixed on the sliding module 15, and the detection module is fixed on the base station.
The one side of slip module and the power transmission and distribution line contact that awaits measuring is smooth, and the slip module can slide to the power transmission and distribution line arc minimum that awaits measuring by oneself, and indoor location UWB module is surveyed the check point and is surveyed the range, and among 2 check points, a check point is fixed with the basic station, and another check point is fixed with the label, and the basic station detects the distance of label and self and is the distance between 2 check points promptly, and indoor location UWB module is found the range accuracy and is responded soon, helps accurately measuring the biggest sag with high efficiency.
The support is a folding tripod support and comprises a support body and a foot rest, the maximum height of the support body after being extended is 0-10cm higher than the height of a telegraph pole, and the base station is fixed at the top end of the support body. The tripod supports steadily and conveniently accomodates and carries, and the tripod is through the straightness that hangs down of the length adjustment pole body of adjusting each foot rest. Because the height of one detection point is consistent with the height of a connection part of a telegraph pole and an electric wire, the detection points are detected by a base station, and the base station is fixed at the top end of the pole body, the maximum extended height of the pole body is at least consistent with the height of the telegraph pole, an installation space is required to be reserved between the pole body and the base station, and the maximum extended height of the pole body is 10cm higher than the height of the telegraph pole.
The indoor positioning UWB module is provided with 3 base stations and 3 labels, the number of the detection points is 3, the indoor positioning UWB module comprises a base station A9, a base station B10, a base station C11, a label a12, a label B13 and a label C14, a base station A9 and a label a12 are fixed on the sliding module 15 corresponding to the monitoring point A, a base station B10 and a label B13 are fixed at the top end of the rod body corresponding to the monitoring point B, a base station C11 and a label C14 are fixed at the joint of the rod body and the foot rest of the support corresponding to the monitoring point C, the detection module is fixed on the base station B and is a thin rope with a heavy object at one end, the verticality of the rod body is calibrated by utilizing the gravity of the heavy object, and when the rod body is parallel to the thin line, the rod body is vertical.
Base station a9 measures the distance from base station a9 to tag b13 and the distance from base station a9 to tag c 14; base station B10 measures the distance from base station B10 to tag a12 and the distance from base station B10 to tag c 14; base station C11 measures the distance from base station C11 to tag a12 and the distance from base station C11 to tag b 13. When there are 3 check points, 3 base stations and 3 labels are installed, each check point is provided with one base station and one label, each base station detects the distance between the labels of the other 2 check points and the base station, therefore, the distance between every 2 check points is measured for 2 times, the handheld terminal takes 2 measurements and takes an average value, and the distance a between the base station B and the base station C, the distance B between the base station A and the base station C, and the distance C between the base station A and the base station B are obtained and used as initial values of space calculation.
The slide module 15 is provided with pulleys. The pulley is the concave type wheel, has the recess, and the survey line card is put in the recess, and the effect of pulley is to change sliding friction into rolling friction, reduces frictional force, is favorable to the sliding module to arrive the minimum of survey line arc, reduces measuring error.
The pulley is equipped with the helping hand motor, and is being surveyed the electric wire arc and hang down lessly, and when the pulley was difficult to roll by self gravity, the helping hand motor can provide the power of initial speed, makes the pulley roll, and the helping hand motor is by handheld terminal wireless control.
The handheld terminal 1 comprises a human-computer interaction module 6 and a processing module 5, the processing module 5 is in wireless connection with the positioning unit 2 through the wireless unit 4, and the human-computer interaction module 6 is in signal connection with the processing module 5.
The processing module receives the spatial position information a, b and c transmitted by the base station through the wireless unit and generates the maximum sag, and the man-machine interaction module displays the maximum sag.
The area of the triangle is
Knowing area by Helen's formula
Pythagorean theorem
From the above equation 4, the
Wherein S is the area of a triangle formed by 3 detection points, h is the height of the triangle formed by 3 detection points with the line segment formed by connecting the test point B and the test point C as the bottom, l is the semi-perimeter of the triangle, l is the length of the triangleBDIs the maximum sag.
The power supply unit 3 comprises a battery management module 8 and a power supply module 7, the power supply module 7 supplies power for the processing module 8 and the positioning unit 2, the battery management module 8 manages the power supply of the processing module 8 and the positioning unit 2, the model of the power supply management module is TP5100, and the power supply management module charges and discharges power and controls the on-off of the power supply.
The invention has the following beneficial effects: (1) the distance between detection points is measured by adopting an indoor positioning UWB module, so that the temperature influence is avoided, and the measurement is accurate and rapid; (2) the indoor positioning UWB module is fixed on the tripod, so that the storage and carrying are convenient; (3) the sliding module is provided with a pulley and a power-assisted motor, and can accurately measure when the arc of the measured wire is relatively small.
Claims (9)
1. The utility model provides a portable power transmission and distribution lines sag detection device, characterized by, including handheld terminal (1), positioning unit (2), power supply unit (3) and wireless unit (4), power supply unit (3) and handheld terminal (1) power supply are connected, power supply unit (3) and positioning unit (2) power supply are connected, positioning unit (2) pass through wireless unit (4) and handheld terminal (1) wireless connection, be equipped with detection module on positioning unit (2).
2. The portable sag detector for power transmission and distribution lines according to claim 1, wherein the positioning unit (2) further comprises a sliding module (15) and an indoor positioning UWB module, the sliding module (15) is sleeved on the power transmission and distribution line to be detected, the indoor positioning UWB module comprises a base station and a tag, the base station is fixed on a support, the support is close to a telegraph pole, the tag is fixed on the sliding module (15), and the detection module is fixed on the base station.
3. The portable sag detector according to claim 2, wherein the support is a foldable tripod support comprising a shaft and a foot rest, the maximum height of the extended shaft of the support is 0-10cm higher than that of the utility pole, and the base station is fixed on the top end of the shaft.
4. The portable power transmission and distribution line sag detection device according to claim 3, wherein the indoor positioning UWB module is provided with 3 base stations and 3 tags, and comprises a base station A (9), a base station B (10), a base station C (11), a tag a (12), a tag B (13) and a tag C (14), wherein the base station A (9) and the tag a (12) are fixed on a sliding module (15), the base station B (10) and the tag B (13) are fixed at the top end of a rod body, and the base station C (11) and the tag C (14) are fixed at the joint of the rod body and a foot rest of the support.
5. The portable sag detection device for power transmission and distribution lines according to claim 4, wherein the base station A (9) measures the distance between the base station A (9) and the label b (13) and the distance between the base station A (9) and the label c (14); the base station B (10) measures the distance between the base station B (10) and the label a (12) and the distance between the base station B (10) and the label c (14); the base station C (11) measures the distance between the base station C (11) and the tag a (12) and the distance between the base station C (11) and the tag b (13).
6. The portable sag detection device according to any one of claims 2 to 5, wherein the sliding module (15) comprises a pulley.
7. The portable sag detection device for the power transmission and distribution line according to claim 6, wherein the pulley is provided with a power-assisted motor.
8. The portable sag detection device for the power transmission and distribution line according to claim 7, wherein the handheld terminal (1) comprises a human-computer interaction module (6) and a processing module (5), the processing module (5) is wirelessly connected with the positioning unit (2) through the wireless unit (4), and the human-computer interaction module (6) is in signal connection with the processing module (5).
9. The portable sag detection device for power transmission and distribution lines according to claim 8, wherein the power supply unit (3) comprises a battery management module (8) and a power supply module (7), the power supply module (7) supplies power to the processing module (8) and the positioning unit (2), and the battery management module (8) manages the power supply to the processing module (8) and the positioning unit (2).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111272117A (en) * | 2020-04-02 | 2020-06-12 | 国家电网有限公司 | Overhead transmission line sag on-line monitoring system |
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Application publication date: 20200327 |