CN111395405A - Self-adaptive well cover opening positioning and labeling prompting device and method - Google Patents
Self-adaptive well cover opening positioning and labeling prompting device and method Download PDFInfo
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- CN111395405A CN111395405A CN202010359344.7A CN202010359344A CN111395405A CN 111395405 A CN111395405 A CN 111395405A CN 202010359344 A CN202010359344 A CN 202010359344A CN 111395405 A CN111395405 A CN 111395405A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/40—Arrangements responsive to adverse atmospheric conditions, e.g. to signal icy roads or to automatically illuminate in fog; Arrangements characterised by heating or drying means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1481—Security devices, e.g. indicating unauthorised opening
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The self-adaptive well cover opening positioning and marking prompting device comprises a stepping motor, a rotary disc, a traction rope, a first roller wheel, a second roller wheel, a pressure sensor, a third roller wheel, a fourth roller wheel, a hollow fan-shaped shell, a sliding block, an air bag, a main control unit, a driving unit, a stepping motor, an angle sensor and an encoder, wherein the radius R of the well cover opening is determined, under the conditions of different water accumulation depths H and water speeds V, the device firstly releases the traction rope with enough length through the stepping motor, then pulls back the traction rope through the stepping motor, the length L of the traction rope is gradually reduced in the process of pulling back the traction rope by the stepping motor, meanwhile, the included angle B between the traction rope and the horizontal plane is gradually increased, when the conditions that L cos (B) = R) is met, the stepping motor stops pulling back the traction rope, the air bag is positioned right above the center of the well cover opening of a sewer, the air bag is positioned right above the center of the well cover opening of the sewer, and the vehicle positioning and the pedestrian and the vehicle marking are more accurately.
Description
Technical Field
The invention relates to the technical field of well lid safety protection, in particular to a self-adaptive well lid opening positioning and labeling prompting device and a method thereof.
Background
At the torrential rain season, because urban drainage system's drainage ability is not enough, there is certain difference in geography simultaneously between the district of difference in the city, after the torrential rain was irritated the sewer, the sewer well lid that is in relief low-lying will take place the blowout phenomenon because of water pressure is too big, and the sewer well lid is turned over by the jack-up, and subaerial rivers can be washed the well lid from original position when turning over.
Sometimes, in order to reduce the obstruction of the accumulated water on the road surface to the traffic, maintenance personnel can open the well cover of the sewer so that the accumulated water on the road surface can quickly flow into the sewer.
Because the ponding has certain degree of depth simultaneously the ponding on road surface is than muddy, people are difficult for noticing whether the well lid on road surface has been washed away from original position by the rainwater, consequently, loses the sewer well lid mouth of well lid and has caused huge threat to people's life safety.
Because rainstorm, when the sewer well lid is washed away the back by water, lay whether the device automated inspection sewer well lid of sewer well lid mouth position department is washed away by the water-washed, if the device detects the well lid and is washed away by water, the device auto-eject gasbag carries out the location mark suggestion to the position of sewer well lid mouth, lay the haulage rope of sewer well lid mouth position department and pull the gasbag and float in the top of sewer well lid mouth to this carries out safety prompt to pedestrian and the vehicle of passing by: the well cover in the area is washed away by water, and does not approach! Thereby ensuring the safety of pedestrians and vehicles.
The air bag floating above the sewer well cover opening can give certain safety prompt to passers-by and vehicles, but has some technical defects and problems.
For example, when the water in the road area is shallow and the traction rope for pulling the air bag is long, the air bag floating on the water surface is brought to a position far away from the axial center of the sewer manhole cover by the road surface flowing water, and the positioning error of the air bag to the sewer manhole cover is large.
When the surface water is deep, the traction rope of the traction air bag is short, the air bag is pulled by the traction rope and immersed in the water and cannot float out of the water, and pedestrians and vehicles passing by cannot see the air bag above the well cover clearly, so that the pedestrians and vehicles passing by cannot be prompted safely.
Meanwhile, the influence of the depth of accumulated water, the road surface water flow speed and the length of a traction rope on the positioning precision of the well cover opening by the air bag floating above the well cover opening of the sewer is considered.
When reminding device's haulage rope length is fixed, is washed away simultaneously when sewer well lid, at different ponding depths and road surface water velocity, the gasbag is as follows to sewer well lid mouth positioning accuracy relation.
When water is accumulated on an urban road and the depth of the accumulated water is fixed, the lower the water flow speed on the surface of the road is, the smaller the offset of the air bag relative to the axis of the sewer manhole cover opening is, and the more accurate the air bag is in positioning the sewer manhole cover opening.
When urban roads are ponded and the ponding depth is fixed, the faster the speed of the water flow on the road surface is, the larger the offset of the air bag relative to the axis position of the sewer manhole cover opening is, and the more inaccurate the air bag is in positioning the sewer manhole cover opening.
When urban roads accumulate water and the water flow speed on the surface of the road is fixed, the deeper the accumulated water depth is, the smaller the offset of the air bag relative to the axis position of the sewer manhole cover opening is, and the more accurate the air bag is in positioning the sewer manhole cover opening.
When urban roads accumulate water and the water flow speed on the surface of the road is fixed, the shallower the depth of the accumulated water is, the larger the offset of the air bag relative to the axis position of the sewer manhole cover opening is, and the more inaccurate the air bag is in positioning the sewer manhole cover opening.
Therefore, if the well lid is washed away by water, the device only simply pops out an gasbag automatically to carry out the location marking suggestion to the position of sewer well lid mouth, and this kind of mode of carrying out the location marking suggestion to the well lid mouth is not accurate, has very big error.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problems that: after sewer well lid was washed away by water, carry out more accurate location mark suggestion to the position of sewer well lid mouth through suggestion device.
Another technical problem to be solved is: when the degree of depth of ponding changes, the suggestion device can be according to the degree of depth change automatic adjustment haulage rope's of current water level length with this adjustment gasbag position in sewer well lid mouth top, make the gasbag be located sewer well lid mouth center directly over the position.
The self-adaptive well cover opening positioning and marking prompting device comprises a stepping motor, a rotary table, a traction rope, a first roller, a second roller, a pressure sensor, a third roller, a fourth roller, a hollow fan-shaped shell, a sliding block, an air bag, a main control unit, a driving unit, a stepping motor, an angle sensor and an encoder, wherein the radius R of the well cover opening is known and determined, under the conditions of different water accumulation depths H and water speeds V, the device firstly discharges the traction rope with enough length through the stepping motor, then the traction rope is pulled back through the stepping motor, in the process of pulling back the traction rope through the stepping motor, the length L of the traction rope is gradually reduced, meanwhile, the included angle B between the traction rope and the horizontal plane is gradually increased, when the conditions that L cos (B) R is met, the stepping motor stops pulling back the traction rope, the air bag is positioned right above the center of the sewer opening, pedestrians are automatically adjusted to place the air bag at the position right above the center of the sewer opening, and the well cover opening is accurately positioned to prompt vehicles and more accurately prompt the sewer.
The rotary disc consists of an upper circular surface, a lower circular surface and a cylinder, the upper bottom surface and the lower bottom surface of the cylinder are respectively connected with the central positions of the upper circular surface and the lower circular surface, and the radius of the circular surfaces of the upper circular surface and the lower circular surface is larger than that of the bottom surface of the cylinder. The bottom surface of the turntable is provided with a cylindrical groove, the cylindrical groove on the bottom surface of the turntable is fixedly connected with a rotating shaft of the stepping motor, and the turntable rotates along with the rotation of the stepping motor.
One end of the traction rope is wound on the turntable, and the other end of the traction rope is fixedly connected with the air bag. The traction rope sequentially passes through the first roller, the second roller, the third roller, the fourth roller, the hollow fan-shaped shell and the sliding block to connect the rotary table and the air bag together.
The main control unit controls the stepping motor to rotate forwards and backwards through the driving unit so as to control the retraction of the traction rope wound on the turntable.
The first roller, the second roller, the third roller and the fourth roller are cylindrical barrels with grooves in the center positions of the side surfaces, the first roller, the second roller, the third roller and the fourth roller are fixed on the cylindrical rotating shaft, and when the traction rope moves, the traction rope drives the first roller, the second roller, the third roller and the fourth roller to rotate.
The grooves in the center positions of the side surfaces of the first roller, the second roller, the third roller and the fourth roller can well restrain the traction rope on the rollers, so that the traction rope is not easy to deviate from the rollers in the moving process.
An encoder is installed inside the first roller, and the encoder inside the first roller is used for calculating the length of the pulled traction rope. In the process that the haulage rope is pulled out by the gasbag, first gyro wheel rotates along with the removal of haulage rope, and the encoder that is located first gyro wheel inside rotates along with the rotation of first gyro wheel, and the code value of encoder output changes along with the rotation of first gyro wheel. Therefore, the main control unit records and processes the coded value output by the coder in real time to obtain the length of the pull rope pulled out.
And a pressure sensor is arranged on the side surface of the second roller, and in the process of outwards releasing the traction rope, the pressure sensor on the side surface of the second roller detects the pressure applied to the second roller by the traction rope.
In the process of releasing the traction rope outwards, when the pressure detected by the main control unit through the pressure sensor on the side surface of the second roller is greater than a preset pressure value, the traction rope is in a tightening state, and at the moment, the main control unit continues to control the stepping motor to rotate through the driving unit to release the traction rope outwards; when the pressure that the main control unit detected through the pressure sensor of second gyro wheel side is not more than preset pressure value, it indicates that the haulage rope is in loose state, and the main control unit controls step motor stall through the drive unit and does not outwards emit the haulage rope this moment.
The hollow fan-shaped shell is a hollow fan-shaped body, the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell are fan surfaces, and the cambered surface in the side surface of the hollow fan-shaped shell is opened. The upper bottom surface and the lower bottom surface of the hollow fan-shaped shell are respectively provided with an arc-shaped slideway, and the arc-shaped slideways on the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell are mutually symmetrical.
The slide block consists of three parts, namely an upper cylinder, a cuboid block and a lower cylinder from top to bottom. The upper bottom surface of the cuboid block is fixedly connected with the lower bottom surface of the upper cylinder, the lower bottom surface of the cuboid block is fixedly connected with the upper bottom surface of the lower cylinder, and the axes of the upper cylinder and the lower cylinder are positioned on the same straight line; a cylindrical hole penetrates through the front face and the back face of the cuboid, and the traction rope penetrates through the cylindrical hole in the upper face of the sliding block.
The angle sensor is fixed inside the upper cylinder of the sliding block and used for detecting the deflection angle of the traction rope relative to the horizontal plane. When the length of the hauling rope changes, the hauling rope drives the sliding block to slide on the arc-shaped slide way of the hollow fan-shaped shell, and the main control unit obtains the deflection angle of the hauling rope relative to the horizontal plane in real time through the angle sensor.
The slider is blocked between the arc slide of the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell and can move left and right along the arc slide.
The angle sensor is used as an input device and connected with the main control unit, the driving unit is connected with the main control unit and the stepping motor, and the driving unit is used for driving the stepping motor.
The assembly steps are as follows.
Firstly, one end of a traction rope is wound on the turntable, and then the traction rope sequentially passes through the first roller, the second roller, the third roller, the fourth roller, the hollow fan-shaped shell and the sliding block to connect the turntable and the air bag together.
The self-adaptive well cover opening positioning and labeling prompting method comprises the following steps.
The invention automatically adjusts the length of the hauling rope to place the air bag right above the center of the sewer well cover opening.
The radius R of the manhole cover is known and determined, so that under the conditions of different water accumulation depths H and water velocities V, the device firstly discharges a traction rope with enough length through the stepping motor, then the traction rope is pulled back through the stepping motor, the length L of the traction rope is gradually reduced in the process that the stepping motor pulls back the traction rope, meanwhile, the included angle B between the traction rope and the horizontal plane is gradually increased, when the condition that L × cos (B) = R is met, the stepping motor stops pulling back the traction rope, the air bag is located right above the center of the manhole cover of the sewer, the air bag is placed at the position right above the center of the manhole cover of the sewer through automatically adjusting the length of the traction rope, and the positioning and marking of the manhole cover of the sewer are more accurate.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a schematic view illustrating automatic adjustment of a length of a pulling rope according to a water level depth according to the present invention.
Fig. 3 is a block diagram of the system of the present invention.
In fig. 1, 1 is a stepping motor, 2 is a turntable, 3 is a traction rope, 4 is a first roller, 5 is a second roller, 6 is a pressure sensor, 7 is a third roller, 8 is a fourth roller, 9 is a hollow fan-shaped shell, 10 is a sliding block, and 11 is an air bag.
In the figure 1, R is the radius of a sewer manhole cover opening, B is an included angle between the traction rope and the horizontal plane, and H is the depth of accumulated water.
Detailed Description
The invention is further illustrated with reference to the accompanying drawings and specific examples.
A first embodiment.
When water is accumulated on the road surface, the water flow direction of the road surface is determined, and the water flow flows from a position with higher topography to a position with lower topography.
The invention automatically adjusts the length of the hauling rope to place the air bag right above the center of the sewer well cover opening.
The control method is as follows.
As shown in figure 1, as the radius R of the manhole cover is known and determined, under the condition of different accumulated water depths H and water velocities V, the device firstly discharges a traction rope with enough length through the stepping motor, then the traction rope is pulled back through the stepping motor, in the process of pulling back the traction rope by the stepping motor, the length L of the traction rope is gradually reduced, meanwhile, the included angle B between the traction rope and the horizontal plane is gradually increased, when the condition that L cos (B) = R is met, the stepping motor stops pulling back the traction rope, the projection of the air bag is positioned at the circle center position of the sewer manhole cover, namely, the air bag is positioned at the position right above the center of the sewer manhole cover through automatically adjusting the length of the traction rope, and the positioning and marking prompt of the sewer manhole cover are more accurate.
A second embodiment.
As shown in fig. 1, the main control unit first controls the stepping motor to reversely rotate through the driving unit to pay out a sufficiently long hauling rope, and then controls the stepping motor to normally rotate through the driving unit to pull back the hauling rope.
In the process that the stepping motor outwards releases the traction rope, when the pressure detected by the main control unit through the pressure sensor on the side surface of the second roller is greater than a preset pressure value, the traction rope is in a tightening state, and at the moment, the main control unit continuously controls the stepping motor to reversely rotate through the driving unit to outwards release the traction rope; when the pressure that the main control unit detected through the pressure sensor of second gyro wheel side was not more than predetermined pressure value, it was in loose state to explain the haulage rope, is unsuitable to emit the haulage rope this moment, because the haulage rope of emitting can pile up in the carousel, and the main control unit passes through drive unit control step motor stall and does not outwards emit the haulage rope this moment. Under the general condition, because the road surface water flow velocity is great, rivers impact the gasbag and make the haulage rope tight, and the pressure that pressure sensor lateral surface of second gyro wheel detected is greater than preset pressure value, and in the process that step motor outwards emits the haulage rope, haulage rope on the carousel receives the pulling force that rivers impact the gasbag and produce and is pulled out in a proper position.
At the in-process of step motor pull-back haulage rope, the gasbag makes the haulage rope tighten because it floats to follow road surface rivers, and the haulage rope drives first gyro wheel, second gyro wheel, third gyro wheel and fourth gyro wheel and rotates, and the encoder that is located first gyro wheel inside rotates along with the rotation of first gyro wheel, and the code value of encoder output changes along with the rotation of first gyro wheel. The main control unit records and processes the coded value output by the coder in real time to obtain the length of the pull rope pulled out.
In the process of pulling back the traction rope by the stepping motor, the traction rope drives the sliding block to slide on the arc-shaped slide way of the hollow fan-shaped shell, and the main control unit detects the deflection angle of the traction rope relative to the horizontal plane in real time through an angle sensor fixed inside an upper cylinder of the sliding block.
When the conditions are met, L × cos (B) = R, the main control unit controls the stepping motor to stop pulling the traction rope, the projection of the air bag is located at the position of the center of the sewer manhole cover, namely the air bag is located right above the center of the sewer manhole cover, so that the air bag is placed at the position right above the center of the sewer manhole cover through automatically adjusting the length of the traction rope, and the positioning and marking prompt of the sewer manhole cover is more accurate.
A third embodiment.
As shown in fig. 2, assuming that the position of the S point is relatively high relative to the position of the L point, the road surface water flow flows from the position of the S point to the position of the L point, i.e., the water flow direction in fig. 2 is from left to right.
Firstly, the device is arranged at the position of S point of the well cover opening, when the water in the road area is washed away by the water in the sewer well cover, the air bag is pulled by the traction rope at the position of S point to float above the well cover opening of the sewer, and at the moment, the traction rope is tensioned and tightened.
Because the radius R of the well cover opening is known and determined, when the depth of accumulated water is H1, the device firstly discharges a sufficiently long traction rope through the stepping motor, then the traction rope is pulled back through the stepping motor, the length L1 of the traction rope is gradually reduced in the process that the stepping motor pulls back the traction rope, meanwhile, the included angle B1 between the traction rope and the horizontal plane is gradually increased, when the condition that L1 & gtcos (B1) = R is met, the stepping motor stops pulling back the traction rope, and at the moment, the air bag is positioned right above the center of the well cover opening of the sewer.
The depth of the accumulated water is H2, and when the condition that L2 × cos (B2) = R is met, the air bag is positioned right above the center of the well cover of the sewer.
The depth of the accumulated water is H3, and when the condition that L3 × cos (B3) = R is met, the air bag is positioned right above the center of the well cover of the sewer.
Therefore, within a certain accumulated water depth range, the device can automatically adjust the length of the traction rope, and then place the air bag right above the center of the sewer well cover opening.
Similarly, when the depth of ponding changes, this device can follow the length of ponding degree of depth automatic adjustment haulage rope, and then places the gasbag in the sewer well lid mouth position directly over at the center.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention.
Claims (2)
1. A self-adaptive well lid opening positioning and labeling prompting device is characterized in that the self-adaptive well lid opening positioning and labeling prompting device and the method thereof comprise the following steps: the device comprises a stepping motor, a turntable, a traction rope, a first roller, a second roller, a pressure sensor, a third roller, a fourth roller, a hollow fan-shaped shell, a sliding block, an air bag, a main control unit, a driving unit, the stepping motor, an angle sensor and an encoder;
the turntable consists of an upper circular surface, a lower circular surface and a cylinder, the upper bottom surface and the lower bottom surface of the cylinder are respectively connected with the central positions of the upper circular surface and the lower circular surface, and the radius of the circular surfaces of the upper circular surface and the lower circular surface is larger than that of the bottom surface of the cylinder; the bottom surface of the turntable is provided with a cylindrical groove, the cylindrical groove on the bottom surface of the turntable is fixedly connected with a rotating shaft of the stepping motor, and the turntable rotates along with the rotation of the stepping motor;
one end of the traction rope is wound on the turntable, and the other end of the traction rope is fixedly connected with the air bag; the traction rope sequentially passes through the first roller, the second roller, the third roller, the fourth roller, the hollow fan-shaped shell and the sliding block to connect the turntable and the air bag together;
the main control unit controls the stepping motor to rotate forwards and backwards through the driving unit so as to control the retraction of the traction rope wound on the turntable;
the first roller, the second roller, the third roller and the fourth roller are cylindrical barrels with grooves in the center positions of the side surfaces, and the first roller, the second roller, the third roller and the fourth roller are fixed on the cylindrical rotating shaft;
an encoder is arranged in the first roller and used for calculating the length of the pulled traction rope; the encoder positioned in the first roller rotates along with the rotation of the first roller, and the encoding value output by the encoder changes along with the rotation of the first roller;
the main control unit records and processes the coded value output by the coder in real time to obtain the length of the pull rope pulled out;
the side surface of the second roller is provided with a pressure sensor, and the pressure sensor on the side surface of the second roller detects the pressure applied on the second roller by the traction rope in the process of outwards releasing the traction rope;
in the process of releasing the traction rope outwards, when the pressure detected by the main control unit through the pressure sensor on the side surface of the second roller is greater than a preset pressure value, the traction rope is in a tightening state, and at the moment, the main control unit continues to control the stepping motor to rotate through the driving unit to release the traction rope outwards; when the pressure detected by the main control unit through the pressure sensor on the side surface of the second roller is not more than a preset pressure value, the traction rope is in a loose state, and at the moment, the main control unit controls the stepping motor to stop rotating through the driving unit and does not release the traction rope outwards any more;
the hollow fan-shaped shell is a hollow fan-shaped body, the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell are fan surfaces, and the cambered surface in the side surface of the hollow fan-shaped shell is opened; the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell are respectively provided with an arc-shaped slideway, and the arc-shaped slideways on the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell are mutually symmetrical;
the sliding block consists of three parts, namely an upper cylinder, a cuboid block and a lower cylinder from top to bottom; the upper bottom surface of the cuboid block is fixedly connected with the lower bottom surface of the upper cylinder, the lower bottom surface of the cuboid block is fixedly connected with the upper bottom surface of the lower cylinder, and the axes of the upper cylinder and the lower cylinder are positioned on the same straight line; a cylindrical hole penetrates through the front surface and the back surface of the cuboid, and the traction rope penetrates through the cylindrical hole on the sliding block;
the angle sensor is fixed inside the upper cylinder of the sliding block and used for detecting the deflection angle of the traction rope relative to the horizontal plane; when the length of the hauling rope changes, the hauling rope drives the sliding block to slide on the arc-shaped slide way of the hollow fan-shaped shell, and the main control unit obtains the deflection angle of the hauling rope relative to the horizontal plane in real time through the angle sensor;
the slide block is clamped between the arc slide ways on the upper bottom surface and the lower bottom surface of the hollow fan-shaped shell and moves left and right along the arc slide ways;
the angle sensor is used as an input device and connected with the main control unit, the driving unit is connected with the main control unit and the stepping motor, and the driving unit is used for driving the stepping motor.
2. The self-adaptive well cover opening positioning and labeling prompting method according to claim 1, characterized by comprising the following steps:
the length of the hauling rope is automatically adjusted to place the air bag right above the center of the sewer well cover opening;
because the radius R of the well cover opening is known and determined, under the condition of different water accumulation depths H and water velocities V, the device firstly discharges a sufficiently long traction rope through the stepping motor, then the traction rope is pulled back through the stepping motor, the length L of the traction rope is gradually reduced in the process that the stepping motor pulls back the traction rope, meanwhile, the included angle B between the traction rope and the horizontal plane is gradually increased, when the condition that L × cos (B) = R is met, the stepping motor stops pulling back the traction rope, and at the moment, the air bag is positioned right above the center of the well cover opening of the sewer.
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| CN202010359344.7A CN111395405B (en) | 2020-04-29 | 2020-04-29 | Self-adaptive well lid positioning labeling prompting device and method thereof |
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| CN202010359344.7A CN111395405B (en) | 2020-04-29 | 2020-04-29 | Self-adaptive well lid positioning labeling prompting device and method thereof |
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| CN203716184U (en) * | 2013-12-27 | 2014-07-16 | 国家电网公司 | Manhole cover available for opening protection and alarm |
| CN104635495A (en) * | 2015-02-09 | 2015-05-20 | 北京航空航天大学 | Hierarchical control method for warp offset of stratospheric satellite with model parameter uncertainty |
| CN204662302U (en) * | 2015-05-08 | 2015-09-23 | 蔡晓程 | Inspection well cover loses automatic warning device |
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