CN116839554A - River ditch depth measuring device for land mapping - Google Patents
River ditch depth measuring device for land mapping Download PDFInfo
- Publication number
- CN116839554A CN116839554A CN202310863305.4A CN202310863305A CN116839554A CN 116839554 A CN116839554 A CN 116839554A CN 202310863305 A CN202310863305 A CN 202310863305A CN 116839554 A CN116839554 A CN 116839554A
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- Prior art keywords
- river
- component
- measuring rope
- sliding
- alarm
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- 238000013507 mapping Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
- G01C13/008—Surveying specially adapted to open water, e.g. sea, lake, river or canal measuring depth of open water
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The application provides a river ditch depth measuring device for land mapping, which belongs to the technical field of land mapping and comprises a supporting component, a winding and unwinding component, a measuring rope, a sliding component, a detecting component, a balancing weight and an alarm, wherein the supporting component is fixedly arranged on a river bank, the winding and unwinding component is arranged at the top of the inner side of the supporting component, one end of the measuring rope is connected with the winding and unwinding component, the other end of the measuring rope penetrates through the sliding component and is connected with the balancing weight, the sliding component is arranged at one side of the supporting component and can slide along the flowing direction of river water compared with the supporting component, and the detecting component and the alarm are arranged at one side of the supporting component. Compared with the prior art, the embodiment of the application can adjust the angle of the measuring rope after the measuring rope is immersed into the river, so that the measuring rope is in a vertical state in the river, and further the accuracy and reliability of the measuring result of the depth of the river are improved.
Description
Technical Field
The application belongs to the technical field of land mapping, and particularly relates to a river channel depth measuring device for land mapping.
Background
Currently, it is often necessary to measure the depth of a river channel when performing land mapping.
In the prior art, a heavy object is hung at one end of a measuring rope, the heavy object is thrown into river water, the heavy object is sunk along the river water and then drives the measuring rope to enter the river water, after the heavy object touches the river bottom, the river bottom depth is obtained by observing scales on the measuring rope, however, the heavy object is pushed to shift towards the downstream direction of the river bank by the thrust of flowing river water when the heavy object is sunk along the river bottom, so that the measuring rope above the heavy object can be in an inclined state when the heavy object touches the river bottom, and the inclined measuring rope cannot accurately reflect the river bottom depth, so that the conventional river bottom depth measuring device cannot accurately and reliably measure the river bottom depth, and improvement is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problem to be solved by the embodiment of the application is to provide a river channel depth measuring device for land mapping.
In order to solve the technical problems, the application provides the following technical scheme:
a river ditch depth measuring device for land surveying and mapping comprises a supporting component, a winding and unwinding component, a measuring rope, a sliding component, a detecting component, a balancing weight and an alarm,
the support component is fixedly arranged on the river bank,
the winding and unwinding assembly is arranged at the top of the inner side of the supporting assembly,
one end of the measuring rope is connected with the winding and unwinding assembly, the other end of the measuring rope penetrates through the sliding assembly and is connected with the balancing weight,
the sliding component is arranged at one side of the supporting component and can slide along the flowing direction of river water compared with the supporting component,
the detection component and the alarm are arranged on one side of the supporting component,
the detection assembly is electrically connected with the alarm, and is used for detecting the vertical condition of the measuring rope between the sliding assembly and the balancing weight and transmitting the detection result to the alarm.
As a further improvement of the application: the support assembly includes a support plate and a top plate,
the bottom of the supporting plate is fixedly connected with the river bank, the top plate is fixedly arranged on the upper part of the supporting plate and extends towards the river surface,
the winding and unwinding assembly comprises a motor, a support and a winding wheel,
the support is fixedly arranged at the bottom of the top plate, the motor is fixedly arranged at one side of the support, the reel is arranged on an output shaft of the motor, and one end, far away from the balancing weight, of the measuring rope is wound outside the reel.
As a further improvement of the application: the bottom of the supporting plate is fixedly provided with a bottom plate, and the bottom plate is connected with the river bank ground through pins.
As a further improvement of the application: a first guide rail is fixedly arranged on one side of the supporting plate,
the sliding component comprises a traction seat and a first sliding rod,
one end of the first sliding rod is in sliding fit with the first guide rail, the other end of the first sliding rod is fixedly connected with the traction seat, and a first through hole through which the measuring rope can pass is formed in the traction seat.
As a still further improvement of the application: one side of the supporting plate is also fixedly provided with a plurality of second guide rails, the first sliding rod is matched with a locking bolt in a threaded manner,
the detection assembly comprises a plurality of target blocks,
the mark piece sets up the traction block below and be vertical distribution in proper order, a plurality of mark piece pastes mutually in proper order, every group mark piece one side is all fixed and is provided with the second slide bar, every group the second slide bar keeps away from the correspondence the one end of mark piece all with a set of second guide rail sliding fit, every group all offer on the mark piece can supply the second through-hole that the measuring rope passed in proper order.
As a still further improvement of the application: a plurality of the standard blocks are provided with conductive columns which vertically penetrate through the standard blocks,
the utility model discloses a support plate, including the support plate, the backup pad lateral wall is fixed to be provided with the power, the positive pole end of power passes through the wire with the below on the mark piece conductive column links to each other, the negative pole end of power pass through the wire with the alarm links to each other, the alarm passes through the wire with the top conductive column on the mark piece.
As a still further improvement of the application: the river channel depth measuring device also comprises a floating block,
a third through hole through which the measuring rope can pass is formed in the upper part of the floating block, a counter bore communicated with the third through hole is formed in the lower part of the floating block, the diameter of the counter bore is larger than that of the third through hole,
the counter bore inner wall is provided with the camera, display panel is installed to backup pad lateral wall, the camera with display panel electricity is connected, be equipped with the scale mark on the measuring rope.
Compared with the prior art, the application has the beneficial effects that:
in the embodiment of the application, when the depth of a river channel is measured, one end of the measuring rope can be unreeled through the unreeling component, at the moment, the measuring rope is sunk into the river water under the action of the balancing weight, when the balancing weight touches the river bottom, the sliding component can be operated to slide along one side of the supporting component towards the downstream direction of the river bank, and as the traction rope penetrates through the sliding component, the measuring rope can be pulled to synchronously move towards the downstream direction of the river bank when the sliding component slides, so that the measuring rope between the sliding component and the balancing weight swings, after the measuring rope swings to the vertical state, the detecting component detects the vertical state of the measuring rope, and transmits the detection result to the alarm, and the alarm sends an alarm signal to remind a measurer that the measuring rope is in the vertical state, and the measuring rope depth data of the river channel can be accurately measured at the moment.
Drawings
FIG. 1 is a schematic diagram of a structure of a trench depth measuring device for land mapping;
FIG. 2 is a schematic diagram of a trench depth measuring device for land mapping;
FIG. 3 is a schematic diagram III of a trench depth measuring device for land mapping;
FIG. 4 is a schematic diagram of a trench depth measuring device for land mapping;
FIG. 5 is an enlarged schematic view of area A of FIG. 1;
FIG. 6 is an enlarged schematic view of area B of FIG. 3;
in the figure: 10-supporting component, 101-supporting plate, 102-top plate, 103-pin, 104-first guide rail, 105-second guide rail, 106-bottom plate, 20-winding and unwinding component, 201-motor, 202-support, 203-reel, 30-measuring rope, 40-sliding component, 401-traction seat, 402-first slide bar, 403-locking bolt, 404-first through hole, 50-detecting component, 501-standard block, 502-second slide bar, 503-conductive column, 504-second through hole, 60-floating block, 601-third through hole, 602-counter bore, 70-balancing weight, 80-power supply, 90-alarm, 100-camera.
Detailed Description
The technical scheme of the application is further described in detail below with reference to the specific embodiments.
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
Referring to fig. 1 and 2, the present embodiment provides a trench depth measurement device for land mapping, which comprises a support assembly 10, a winding and unwinding assembly 20, a measurement rope 30, a sliding assembly 40, a detection assembly 50, a balancing weight 70 and an alarm 90, wherein the support assembly 10 is fixedly installed on a river bank, the winding and unwinding assembly 20 is installed at the top of the inner side of the support assembly 10, one end of the measurement rope 30 is connected with the winding and unwinding assembly 20, the other end penetrates through the sliding assembly 40 and is connected with the balancing weight 70, the sliding assembly 40 is installed at one side of the support assembly 10 and can slide along the flowing direction of river water compared with the support assembly 10, the detection assembly 50 and the alarm 90 are arranged at one side of the support assembly 10, the detection assembly 50 is electrically connected with the alarm 90, and the detection assembly 50 is used for detecting the vertical condition of the measurement rope 30 between the sliding assembly 40 and the balancing weight 70 and transmitting the detection result to the alarm 90.
When the depth of the river is measured, one end of the measuring rope 30 can be unreeled through the unreeling component 20, at this time, the measuring rope 30 is sunk into the river under the action of the balancing weight 70, when the balancing weight 70 touches the river bottom, the sliding component 40 can be operated to slide along one side of the supporting component 10 towards the downstream direction of the river bank, because the traction rope 30 penetrates through the sliding component 40, when the sliding component 40 slides, the measuring rope 30 can be pulled to synchronously move towards the downstream direction of the river bank, so that the measuring rope 30 between the sliding component 40 and the balancing weight 70 swings, after the measuring rope 30 swings to the vertical state, the detecting component 50 detects the vertical state of the measuring rope 30 and transmits the detection result to the alarm 90, and the alarm 90 sends an alarm signal to remind a measurer that the measuring rope 30 is in the vertical state, and at this time, the depth data of the river can be accurately measured by the measuring rope 30.
Referring to fig. 1 and 3, in one embodiment, the support assembly 10 includes a support plate 101 and a top plate 102, the bottom of the support plate 101 is fixedly connected with a river bank, the top plate 102 is fixedly disposed on the upper portion of the support plate 101 and extends towards the river face direction, the winding and unwinding assembly 20 includes a motor 201, a support 202 and a reel 203, the support 202 is fixedly mounted on the bottom of the top plate 102, the motor 201 is fixedly disposed on one side of the support 202, the reel 203 is mounted on an output shaft of the motor 201, and one end of the measuring rope 30 far away from the balancing weight 70 is wound outside the reel 203.
When the depth of the river channel is required to be measured, the motor 201 can drive the reel 203 to rotate, further unreel the measuring rope 30, the measuring rope 30 is driven to sink into the river water under the gravity action of the balancing weight 70, and the measuring rope 30 is pulled to swing to a vertical state by the sliding component 40 until the balancing weight 70 touches the river bottom, so that the depth of the river channel is measured.
Referring to fig. 2, in one embodiment, a bottom plate 106 is fixedly disposed at the bottom of the supporting plate 10, and the bottom plate 106 is connected to the river land surface by pins 103.
Referring to fig. 1 and 5, in one embodiment, a first guide rail 103 is fixedly disposed on one side of the support plate 101, the sliding assembly 40 includes a traction seat 401 and a first sliding rod 402, one end of the first sliding rod 402 is slidably matched with the first guide rail 103, the other end is fixedly connected with the traction seat 402, and a first through hole 404 through which the measuring rope 30 can pass is formed in the traction seat 402.
In the process that the balancing weight 70 drives the measuring rope 30 to sink into river water, the measuring rope 30 passes through the first through hole 404, when the balancing weight 70 touches the river bottom, a measurer can push the first sliding rod 402, so that the first sliding rod 402 slides along the first guide rail 104 along the river water flowing direction, further, the traction block 401 is driven to move along the river water flowing direction, the measuring rope 30 can be pulled when the traction block 401 moves, so that the measuring rope 30 swings, when the measuring rope 30 swings to be in a vertical state, the detecting component 50 detects the vertical state of the measuring rope 30, the detecting result is transmitted to the alarm 90, and the alarm 90 sends an alarm signal to remind the measurer that the measuring rope 30 is in the vertical state, and at the moment, the river channel depth data can be accurately measured by the measuring rope 30.
Referring to fig. 1 and 5, in an embodiment, a plurality of second guide rails 105 are further fixedly disposed on one side of the supporting plate 101, locking bolts 403 are screwed on the first sliding rods 402, the detecting assembly 50 includes a plurality of blocks 501, a plurality of blocks 501 are disposed below the traction block 401 and are distributed vertically in sequence, a plurality of blocks 501 are attached to each other in sequence, a second sliding rod 502 is fixedly disposed on one side of each block 501, one end of each second sliding rod 502 far away from the corresponding block 501 is slidably engaged with one set of second guide rails 105, and a second through hole 504 through which the measuring rope 30 can sequentially pass is formed in each block 501.
In the process that the balancing weight 70 drives the measuring rope 30 to sink along the river water, the first sliding rod 402 and the first guide rail 104 can be locked through the locking bolt 403, so that the traction block 401 is locked, when the balancing weight 70 touches the river bottom, the balancing weight 70 is offset towards the downstream direction of the river bank due to the scouring of the river water, so that the measuring rope 30 between the balancing weight 70 and the traction block 401 is inclined, when the measuring rope 30 is inclined, a plurality of standard blocks 501 can be driven to be inclined to be in an up-down dislocation state (as shown in fig. 4), at the moment, the locking bolt 403 can be screwed to release the locking between the first sliding rod 402 and the first guide rail 104, then the first sliding rod 402 is pushed along the river water flowing direction, so that the traction block 401 is driven to move along the river water flowing direction, and simultaneously the motor 201 drives the reel 203 to reversely rotate, so as to wind the measuring rope 30, so when the traction block 401 moves the measurement rope 30 and swings, the rolling function of the rolling wheel 203 on the measurement rope 30 can be utilized to enable the measurement rope 30 to be always in a straightened state in the swinging process, the measurement rope 30 can apply thrust to a plurality of standard blocks 501 in the swinging process, when the standard blocks 501 are subjected to the thrust, the corresponding second sliding rods 502 can be driven to adaptively slide along the second guide rail 105 until the standard blocks 501 slide to a certain position and then can be aligned up and down again, at this time, the measurement rope 30 between the traction block 401 and the balancing weight 70 is in a vertical state, the conclusion that the measurement rope 30 between the traction block 401 and the balancing weight 70 is in the vertical state can be obtained when the measurement personnel observe the up-down aligned state of the standard blocks 501 by naked eyes, and finally, the depth of a river is measured by utilizing the vertical measurement rope 30.
Referring to fig. 3 and 5, in one embodiment, a plurality of blocks 501 are provided with conductive pillars 503, the conductive pillars 503 vertically penetrate through the blocks 501, a power source 80 is fixedly disposed on a side wall of the supporting plate 101, an anode end of the power source 80 is connected with the conductive pillars 503 on the lowermost block 501 through a wire, a cathode end of the power source 80 is connected with the alarm 90 through a wire, and the alarm 90 is connected with the conductive pillars 503 on the uppermost block 501 through a wire.
When the balancing weight 70 touches the river bottom and drives the plurality of standard blocks 501 to be in an inclined up-down dislocation state through the measuring rope 30, the conductive pillars 503 on the plurality of standard blocks 501 are horizontally dislocated, and at the moment, the power supply 80 cannot supply power to the alarm 90 through the plurality of conductive pillars 503, namely the alarm 90 cannot send an alarm signal; when the second sliding rod 402 is pushed to drive the plurality of blocks 501 to slide to a certain position and then to align up and down again, the conductive posts 503 on the plurality of blocks 501 can be aligned synchronously and attached in sequence, at this time, the power supply 80 can supply power to the alarm 90 through the plurality of aligned and attached conductive posts 503, and the alarm 90 sends an alarm signal after being electrified, so as to remind a measurer that the measuring rope 30 between the traction block 401 and the balancing weight 70 is still in a vertical state at this time.
Referring to fig. 1 and 6, in one embodiment, the ditch depth measuring device further includes a floating block 60, a third through hole 601 through which the measuring rope 30 passes is provided at an upper portion of the floating block 60, a counter bore 602 communicating with the third through hole 601 is provided at a lower portion of the floating block 60, a diameter of the counter bore 602 is greater than a diameter of the third through hole 601, a camera 100 is provided on an inner wall of the counter bore 602, a display panel (not shown in the drawing) is mounted on a side wall of the supporting plate 101, the camera 100 is electrically connected with the display panel, and scale marks are provided on the measuring rope 30.
When the balancing weight 70 drives the measuring rope 30 to sink along the river, the floating block 60 floats on the river surface, after the balancing weight 70 touches the river bottom and the measuring rope 30 located between the balancing weight 70 and the traction block 401 swings to a vertical state, the camera 100 is used for photographing the scale mark at the joint of the measuring rope 30 and the river surface, the photographed surface is displayed on the display panel, and at the moment, a measurer can obtain the depth of the river channel according to the scale value reflected by the scale mark on the display panel.
In one embodiment, the alarm 90 may be a flashing light or a buzzer, without limitation.
In the embodiment of the application, when the depth of a river channel is measured, one end of the measuring rope 30 can be unreeled through the unreeling component 20, at this time, the measuring rope 30 sinks into the river water under the action of the balancing weight 70, when the balancing weight 70 touches the river bottom, the sliding component 40 can be operated to slide along one side of the supporting component 10 towards the downstream direction of the river bank, and as the hauling rope 30 penetrates through the sliding component 40, the measuring rope 30 can be pulled to synchronously move towards the downstream direction of the river bank when the sliding component 40 slides, so that the measuring rope 30 between the sliding component 40 and the balancing weight 70 swings, after the measuring rope 30 swings to the vertical state, the detecting component 50 detects the vertical state of the measuring rope 30 and transmits the detection result to the alarm 90, and the alarm 90 sends an alarm signal to remind a measurer that the measuring rope 30 is in the vertical state, at this time, the depth data of the river channel can be accurately measured by using the measuring rope 30, compared with the prior art, after the measuring rope 30 sinks into the water, the angle of the measuring rope 30 can be adjusted, so that the measuring rope 30 swings towards the downstream direction of the river channel, the vertical state is caused, the measuring rope 30 swings, the vertical state of the river channel is detected, the measuring rope 30 is detected, the vertical state, the measuring result is further, the accuracy of the measuring result is improved, and the accuracy of the depth is further, and the measuring result is.
While the preferred embodiments of the present application have been described in detail, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (7)
1. The river ditch depth measuring device for land surveying and mapping is characterized by comprising a supporting component, a winding and unwinding component, a measuring rope, a sliding component, a detecting component, a balancing weight and an alarm,
the support component is fixedly arranged on the river bank,
the winding and unwinding assembly is arranged at the top of the inner side of the supporting assembly,
one end of the measuring rope is connected with the winding and unwinding assembly, the other end of the measuring rope penetrates through the sliding assembly and is connected with the balancing weight,
the sliding component is arranged at one side of the supporting component and can slide along the flowing direction of river water compared with the supporting component,
the detection component and the alarm are arranged on one side of the supporting component,
the detection assembly is electrically connected with the alarm, and is used for detecting the vertical condition of the measuring rope between the sliding assembly and the balancing weight and transmitting the detection result to the alarm.
2. The apparatus of claim 1, wherein the support assembly comprises a support plate and a top plate,
the bottom of the supporting plate is fixedly connected with the river bank, the top plate is fixedly arranged on the upper part of the supporting plate and extends towards the river surface,
the winding and unwinding assembly comprises a motor, a support and a winding wheel,
the support is fixedly arranged at the bottom of the top plate, the motor is fixedly arranged at one side of the support, the reel is arranged on an output shaft of the motor, and one end, far away from the balancing weight, of the measuring rope is wound outside the reel.
3. The river depth measuring device for land survey and drawing of claim 2 wherein the bottom of the support plate is fixedly provided with a bottom plate, and the bottom plate is connected with the land of the river by pins.
4. The river depth measuring device for land survey and drawing according to claim 2, wherein a first guide rail is fixedly provided at one side of the supporting plate,
the sliding component comprises a traction seat and a first sliding rod,
one end of the first sliding rod is in sliding fit with the first guide rail, the other end of the first sliding rod is fixedly connected with the traction seat, and a first through hole through which the measuring rope can pass is formed in the traction seat.
5. The river depth measuring device for land survey and drawing according to claim 4, wherein a plurality of second guide rails are fixedly arranged on one side of the supporting plate, locking bolts are screwed on the first sliding rods,
the detection assembly comprises a plurality of target blocks,
the mark piece sets up the traction block below and be vertical distribution in proper order, a plurality of mark piece pastes mutually in proper order, every group mark piece one side is all fixed and is provided with the second slide bar, every group the second slide bar keeps away from the correspondence the one end of mark piece all with a set of second guide rail sliding fit, every group all offer on the mark piece can supply the second through-hole that the measuring rope passed in proper order.
6. The river depth measuring device for land survey and drawing according to claim 5, wherein a plurality of the standard blocks are provided with conductive columns which vertically penetrate through the standard blocks,
the utility model discloses a support plate, including the support plate, the backup pad lateral wall is fixed to be provided with the power, the positive pole end of power passes through the wire with the below on the mark piece conductive column links to each other, the negative pole end of power pass through the wire with the alarm links to each other, the alarm passes through the wire with the top conductive column on the mark piece.
7. A trench depth measurement apparatus for land mapping as defined in claim 2, wherein the trench depth measurement apparatus further comprises a float,
a third through hole through which the measuring rope can pass is formed in the upper part of the floating block, a counter bore communicated with the third through hole is formed in the lower part of the floating block, the diameter of the counter bore is larger than that of the third through hole,
the counter bore inner wall is provided with the camera, display panel is installed to backup pad lateral wall, the camera with display panel electricity is connected, be equipped with the scale mark on the measuring rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310863305.4A CN116839554A (en) | 2023-07-14 | 2023-07-14 | River ditch depth measuring device for land mapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310863305.4A CN116839554A (en) | 2023-07-14 | 2023-07-14 | River ditch depth measuring device for land mapping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116839554A true CN116839554A (en) | 2023-10-03 |
Family
ID=88163254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310863305.4A Pending CN116839554A (en) | 2023-07-14 | 2023-07-14 | River ditch depth measuring device for land mapping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116839554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433495A (en) * | 2023-12-20 | 2024-01-23 | 盐城郅联空间科技有限公司 | River ditch depth measuring instrument for land mapping |
-
2023
- 2023-07-14 CN CN202310863305.4A patent/CN116839554A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433495A (en) * | 2023-12-20 | 2024-01-23 | 盐城郅联空间科技有限公司 | River ditch depth measuring instrument for land mapping |
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