CN110823194A - Method and device for measuring water depth of slope surface flow - Google Patents
Method and device for measuring water depth of slope surface flow Download PDFInfo
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- CN110823194A CN110823194A CN201911125182.4A CN201911125182A CN110823194A CN 110823194 A CN110823194 A CN 110823194A CN 201911125182 A CN201911125182 A CN 201911125182A CN 110823194 A CN110823194 A CN 110823194A
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/26—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring depth
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Abstract
The invention relates to a method and a device for measuring the depth of water of a slope surface flow, belonging to the technical field of soil erosion, wherein the device for measuring the depth of water of the slope surface flow comprises a device main body part and a depth measurement trigger circuit; the device main body part comprises a fixed support (a), a bed bottom contact foot (b), a fixed scale (c), a movable scale (d), an angle adjusting device (e), a capacitive grating sensor circuit module (f), a measuring probe (g) and a spherical probe (m) on the measuring probe; the water depth measurement trigger circuit comprises a power supply (h), an led lamp (i), a buzzer (j) and a water depth recorder (k); the invention can accurately measure the water depth data of the slope surface flow, can select the type of the bed bottom contact foot according to different experimental requirements, and can be used for indoor and outdoor slope surface flow measurement. The device of the invention has the characteristics of simple structure, low price, reliable work, high precision, convenience and practicability.
Description
Technical Field
The invention relates to a method and a device for measuring the depth of water of a slope surface flow, belonging to the technical field of soil erosion.
Background
The water depth is one of important parameters of the slope surface flow dynamics, and is a basic parameter for calculating the flow velocity, the flow shearing force and the flow power of the slope surface flow.
Under the field condition, the depth of the slope surface current is very strongly influenced by the condition of the underlying surface, vegetation coverage, rainfall and disturbance thereof, so that the depth of the slope surface current is extremely difficult to directly measure under the field condition. Under the laboratory condition, factors such as the flow of the slope surface flow, the slope, the roughness of the underlying surface, the sand conveying rate and the like can be controlled, and the measurement of the depth of the slope surface flow is easier to realize compared with the field.
The measurement method of the water depth of the slope surface flow is divided into direct measurement and indirect measurement. The direct measurement adopts a ruler, a vernier caliper and the like to directly measure the water depth. Because the depth of the water of the slope surface flow is very small, the water is generally in the millimeter level, and meanwhile, the multi-point measurement consumes long time, so that the test progress is influenced. On the other hand, the manual measurement lacks the discrimination standard that the measuring pin contacted the surface of water, and measurement error is great. An indirect measurement method is to reverse the slope surface current water depth by measuring the flow velocity. Common water flow rate measuring methods include dyeing, salt solution, hot film flow meter, ultrasonic measurement, etc. The dyeing method is a commonly used method for measuring the flow velocity of the slope surface flow at present, and when the sand content of the water flow is high and the color of the water flow changes, the color of a reagent is not easy to observe, and a measurement error is easy to generate; on the other hand, the flow velocity of the surface layer of the slope flow directly measured by the dyeing method needs to be corrected to be the average flow velocity, but the correction coefficient changes along with the change of the water flow working condition and is difficult to obtain. The salt solution method is influenced by the length of the flow field and the salt concentration distribution function. The hot film rheometer is unable to measure the flow rate of the sand laden water flow. The ultrasonic measurement method needs to arrange a probe in the water tank in advance, has higher measurement cost and difficulty and is not suitable for field slope surface flow measurement. In summary, since the flow velocity is difficult to measure accurately, there is a large error in calculating the water depth indirectly by dividing the flow velocity by the flow velocity.
The capacitive grating sensor has the advantages of reliable work, low power consumption, small volume, light weight, high frequency response speed, convenient installation, long service life and the like, and is very suitable for working in the field and under severe conditions. The application is more and more extensive in the aspects of civil use and military use. The measurement precision of the capacitive grating sensor applied to the current market can reach 0.01mm, and the requirement of the precision of water depth measurement can be completely met.
In summary, the current method for directly measuring the water depth of the slope surface flow mainly lacks the standard for judging the contact of the probe with the water surface, the measurement precision is greatly influenced by the measurement experience of researchers and random errors, and the traditional vernier caliper takes a long time to read, so that the test progress is influenced. The indirect measurement method is limited in application environment, and the measurement precision is influenced by the water flow working condition.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the depth of water of a slope surface flow, which can greatly improve the measurement precision of the depth of water of the slope surface flow, greatly reduce random errors caused by personnel operation and can finish the depth of water of the slope surface flow under different hydraulic working conditions.
In order to achieve the purpose, the invention provides the following technical scheme:
a device for measuring the depth of water of a slope surface current comprises a device main body part and a depth measurement trigger circuit;
the device main body part comprises a fixed support a, a bed bottom contact foot b, a fixed scale c, a movable scale d, an angle adjusting device e, a capacitive grating sensor circuit module f, a measuring probe g and a spherical probe m on the measuring probe;
the fixed support a comprises a top plate and a plurality of support legs which are connected with the top plate and are positioned at the lower part of the top plate;
an angle adjusting device e is fixed at the bottom of the top plate;
the lower part of the angle adjusting device e is fixed with a fixed length c; the inner end of the movable ruler d is slidably arranged on the fixed ruler c, and a capacitive grating sensor circuit module f is fixed on the movable ruler d; the measuring probe g is positioned below the movable ruler d, the bottom end of the measuring probe g is provided with a spherical probe m, and the top end of the measuring probe g is connected with the outer end of the movable ruler d;
the top end of the bed bottom contact foot b is fixedly connected with the lower end of the fixed length c and is coaxial with the fixed length c; when the movable ruler d moves to the lowest point, the bed bottom contact foot b is parallel to the lowest end of the spherical probe m; the fixed scale c, the movable scale d and the capacitive grid sensor circuit module f jointly form a capacitive grid sensor, and the capacitive grid sensor circuit module f comprises a capacitive grid sensor circuit;
the water depth measurement trigger circuit comprises a power supply h, an led lamp i, a buzzer j and a water depth recorder k;
in the water depth measurement trigger circuit, a first circuit access point I is fixed on a spherical probe m of a spherical measurement probe g and is connected with an anode of a power supply h; a second circuit access point II is connected into the slope surface flowing water through a bed bottom contact pin b, an led lamp i, a buzzer j and a water depth recorder k are connected between the second circuit access point II and the cathode of a power supply h in parallel, and a loop of the power supply h-the water depth recorder k, the buzzer j, the led lamp i-the bed bottom contact pin b-the flowing water-a measuring probe g-the power supply is formed; and the third circuit access point III is electrically connected with the capacitive grating sensor circuit module f and is used for recording water depth data when the loop is conducted.
The plurality of legs are arranged symmetrically.
The number of the supporting legs is four.
The bottom surface of the bed bottom contact foot b is a flat plate.
The bed bottom contact foot b is a flat plate with the side length of 20cm multiplied by 20 cm.
The bed bottom contact foot b is a cylinder or a column with a rectangular cross section.
The bed bottom contact foot b is a cylinder or a column with the diameter or the side length of 3-5 mm.
A method of depth measurement of a slope surface current using the apparatus, the method comprising the steps of:
1. selecting a proper type of bed bottom contact foot according to different slope shapes and measurement requirements;
2. moving the movable ruler d to the lowest point, enabling the lowest end of the spherical probe m of the measuring probe g to be superposed with the bottom surface of the bed bottom contact foot b, and adjusting zero;
3. the fixed length c is perpendicular to the slope surface through the angle adjusting device e, and the fixed support a is adjusted at the same time, so that the bed bottom contact foot b is in contact with the slope surface; fixing the angle adjusting device e and the fixing bracket a to stabilize the measuring instrument;
4. drawing the movable ruler d to a first distance position where a spherical probe m of the measuring probe g is positioned above the water surface; opening a switch of a water depth measurement trigger circuit, slowly pushing a movable ruler d downwards to enable a spherical probe m of a measurement probe g to contact the water surface, stopping moving the movable ruler d when a trigger sends a signal, automatically recording the water depth data by a water depth recorder k, and finishing the measurement;
5. pulling up the movable ruler d, and repeatedly measuring for a plurality of times according to the method of the step 4; and after multiple measurements, taking the average value to obtain the depth of the slope surface flow, wherein the measurement times are selected according to the measurement conditions.
In step 4, the first distance is 1-2 cm.
In step 5, the number of repeated measurements is 3-5.
Compared with the prior art, the invention has the beneficial effects that:
the method aims at the requirements of measuring the depth of the slope surface current in soil erosion research and the current situation that the current slope surface current depth of water is not suitable for a measuring method. The invention utilizes a capacitive grating sensor to measure distance, designs a method for judging the contact of a probe and a slope surface flowing water surface, utilizes the conductivity of water flow, triggers an acousto-optic prompting device when the measuring probe is in contact with the slope surface flowing water surface, and records the water depth data measured by the capacitive grating sensor. Meanwhile, a plurality of slope surface fluid bed bottom probes are designed to meet the water depth measurement requirements under different underlying surface conditions. Through angle adjusting device for the probe can both be perpendicular domatic under different domatic angles, ensures measuring position accuracy. Because the conduction speed of the current is extremely high, the time for triggering the water depth recording when the measuring probe is contacted with the water surface is far shorter than the time for manual judgment. The method of the invention can greatly improve the measurement precision of the water depth of the slope surface flow. On the other hand, the trigger event that the measuring probe contacts the water surface can be regarded as a unique state and is not influenced by manual operation, and random errors caused by manual operation can be greatly reduced.
The device adopts the position of the capacitive grating sensor measuring probe relative to the bed surface, triggers the acousto-optic prompting device by the contact of the measuring probe with the slope surface water flow, and records the water depth at the same time. The method can complete the measurement of the depth of the slope surface flow under different hydraulic working conditions.
The invention can accurately measure the water depth data of the slope surface flow, can select the type of the bed bottom contact foot according to different experimental requirements, and can be used for indoor and outdoor slope surface flow measurement. The device of the invention has the characteristics of simple structure, low price, reliable work, high precision, convenience and practicability.
Drawings
FIG. 1 is a schematic view of an apparatus for bathymetry of a slope surface current of the present invention;
FIG. 2 is a circuit diagram of a bathymetry trigger circuit of the apparatus for bathymetry of a slope surface current of the present invention;
FIG. 3 is a schematic view of a plate probe of the apparatus for bathymetry of a slope surface flow of the present invention;
FIG. 4 is a schematic view of a needle probe of the present invention for measuring water depth of a slope surface current;
fig. 5 is a diagram of the working layout of the device for measuring the depth of water of the slope surface current.
Reference numerals:
a. fixing support
b. Bed bottom contact foot
c. Fixed size
d. Movable ruler
e. Angle adjusting device
f. Capacitive gate sensor circuit module
g. Measuring probe
h. Power supply
i. LED lamp
j. Buzzer
k. Water depth recorder
m, spherical probe
A. Slope
B. Water flow to be measured
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the present invention of an apparatus for depth measurement of a slope surface current. The invention relates to a device for measuring the depth of water of a slope surface flow.
The device main part includes fixed bolster a, bed bottom feeler b, scale c, movable scale d, angle adjusting device e, capacitive grating sensor circuit module f, measurement probe g and the spherical probe m on the measurement probe.
The fixing bracket a includes a top plate and a plurality of legs connected to the top plate and positioned at a lower portion of the top plate. The plurality of legs are arranged symmetrically. Preferably, the number of the legs is four. The fixed support a is used for fixing the measuring instrument on the slope surface to be measured.
And an angle adjusting device e is fixed at the bottom of the top plate. The angle adjusting device e is used for adjusting the angle of the fixed length c relative to the measurement slope surface, so that the fixed length c is perpendicular to the underlying surface under different slope surface conditions.
The lower part of the angle adjusting device e is fixed with a fixed length c. The inner end of the movable ruler d is slidably arranged on the fixed ruler c, and the capacitive grating sensor circuit module f is fixed on the movable ruler d. The measuring probe g is positioned below the movable ruler d, the bottom end of the measuring probe g is provided with a spherical probe m, and the top end of the measuring probe g is connected with the outer end of the movable ruler d.
The top end of the bed bottom contact foot b is fixedly connected with the lower end of the fixed length c and is coaxial with the fixed length c. When the movable ruler d moves to the lowest point, the bed bottom contact foot b is parallel to the lowest end of the spherical probe m. The bed bottom contact foot b is used for positioning the capacitive grating sensor. The water depth measuring point is positioned at the bottom of the bed and is also connected with a second measuring point II of the water depth trigger circuit as one part of the trigger circuit of the measuring instrument. And the fixed ruler c, the movable ruler d and the capacitive grating sensor circuit module f jointly form a capacitive grating sensor for measuring the water flow depth. The capacitive gate sensor circuit module f comprises a capacitive gate sensor circuit.
Fig. 2 is a circuit diagram of a water depth measurement trigger circuit of the slope surface flow water depth measurement device, which comprises a power supply h, an led lamp i, a buzzer j and a water depth recorder k.
In the water depth measurement trigger circuit, a first circuit access point I is fixed on a spherical probe m of a spherical measurement probe g and is connected with an anode of a power supply h; and a second circuit access point II is connected into the slope surface flowing water through a bed bottom contact pin b, and an led lamp i, a buzzer j and a water depth recorder k are connected in parallel between the second circuit access point II and the cathode of a power supply h to form a loop of the power supply h-the water depth recorder k/the buzzer j/the led lamp i-the bed bottom contact pin b-the flowing water-a measuring probe g-the power supply. And the third circuit access point III is electrically connected with the capacitive grating sensor circuit module f and is used for recording water depth data when the loop is conducted. When a spherical probe m of the spherical measuring probe g contacts the water surface, the trigger circuit is switched on, the water depth recorder k automatically records position signals from the capacitive grating sensor, namely slope water flow depth data, and meanwhile, a tester is reminded of finishing measurement through light signals of the buzzer j or the led lamp i.
It should be noted that the bathymetric survey trigger circuit and the capacitive grating sensor circuit are two circuits, and the relationship between the two circuits is that after the bathymetric survey loop is switched on, the excitation is sent to the capacitive grating sensor circuit module f, the capacitive grating sensor circuit is switched on at the moment, the bathymetric recorder k starts to work, records the bathymetric data at the moment and stores the bathymetric data in the bathymetric recorder k, namely, the capacitive grating sensor circuit is of a trigger type.
Considering that the types of the underlying surfaces are different during measurement and the measurement emphasis is different, two different types of the bed bottom contact feet b are designed to meet the requirements of different test conditions, as shown in fig. 3 and 4 respectively.
The bed bottom contact foot b of fig. 3 is of the plate type probe, and the bottom surface of the bed bottom contact foot b is a flat plate. Preferably, the bed bottom foot b is a flat plate with a side length of 20cm × 20 cm. When using this probe, the entire bed feeler b touches the base of the slope, at which point the probe position can be considered as the average height of this part.
The bed foot b of fig. 4 is of the type of a needle probe, which is cylindrical or a column with a rectangular cross section. Preferably, the bed bottom contact foot b is a cylinder or a column with the diameter or the side length of 3-5 mm. When the probe is used, the position of the probe can be regarded as the height of the slope surface at the point, and the probe can be touched on the slope surface by attention when the probe is used, so that the probe can be inserted into the slope bottom without exerting too much force, and measurement errors are caused.
The plate-type probe is suitable for being used when the underlying surface is relatively flat, the water flow depth difference at each position is not large, and the plate-type probe is also suitable for being used when the local average water flow depth is measured. The needle type probe is suitable for the conditions that the lower cushion surface is easy to change due to water flow erosion and the water flow disturbance is large.
The measurement principle of this patent is as follows:
as shown in figure 5, the measuring instrument is fixed on a slope A through a device consisting of a fixed support a, a fixed length b and an angle adjusting mechanism e, the angle of the water depth measuring instrument is adjusted according to the slope angle, and the fixed length is ensured to be vertical to the slope to be measured. The water depth measurement trigger circuit is composed of a measurement probe g, a bed bottom feeler B, a spherical probe m and a water flow B to be measured. When the spherical probe m of the measuring probe g contacts the water surface of the slope surface flow B, current is generated in the trigger circuit, the water depth recorder k records position data of the movable scale d output by the capacitive grating sensor, namely the slope surface flow water depth, and meanwhile, an acousto-optic signal is generated to remind the end of measurement.
The invention relates to a method for measuring the depth of water of a slope surface flow, which comprises the following steps:
1. selecting a proper type of bed bottom contact foot according to different slope shapes and measurement requirements;
2. moving the movable ruler d to the lowest point, enabling the lowest end of the spherical probe m of the measuring probe g to be superposed with the bottom surface of the bed bottom contact foot b, and adjusting zero;
3. the fixed length c is perpendicular to the slope surface through the angle adjusting device e, and the fixed support a is adjusted at the same time, so that the bed bottom contact foot b is in contact with the slope surface; fixing the angle adjusting device e and the fixing bracket a to stabilize the measuring instrument;
4. the movable ruler d is pulled to a first distance above the water surface where the spherical probe m of the measuring probe g is located. Preferably, the first distance is 1-2 cm. Opening a switch of a water depth measurement trigger circuit, slowly pushing a movable ruler d downwards to enable a spherical probe m of a measurement probe g to contact the water surface, stopping moving the movable ruler d when a trigger sends a signal, automatically recording the water depth data by a water depth recorder k, and finishing the measurement;
5. and (5) pulling up the movable ruler d, and repeatedly measuring for a plurality of times according to the method of the step 4. And after multiple measurements, taking the average value to obtain the depth of the slope surface flow, wherein the measurement times are selected according to the measurement conditions. Preferably, the number of measurements is 3-5.
Claims (10)
1. The utility model provides a device of measurement of depth of water of slope surface current which characterized in that: the device comprises a device main body part and a water depth measurement trigger circuit;
the device main body part comprises a fixed support (a), a bed bottom contact foot (b), a fixed scale (c), a movable scale (d), an angle adjusting device (e), a capacitive grating sensor circuit module (f), a measuring probe (g) and a spherical probe (m) on the measuring probe;
the fixed bracket (a) comprises a top plate and a plurality of legs which are connected with the top plate and are positioned at the lower part of the top plate;
an angle adjusting device (e) is fixed at the bottom of the top plate;
the lower part of the angle adjusting device (e) is fixed with a fixed length (c); the inner end of the movable ruler (d) is slidably arranged on the fixed ruler (c), and a capacitive grating sensor circuit module (f) is fixed on the movable ruler (d); the measuring probe (g) is positioned below the movable ruler (d), the bottom end of the measuring probe (g) is provided with a spherical probe (m), and the top end of the measuring probe (g) is connected with the outer end of the movable ruler (d);
the top end of the bed bottom contact foot (b) is fixedly connected with the lower end of the fixed length (c) and is coaxial with the fixed length (c); when the movable ruler (d) moves to the lowest point, the bed bottom contact foot (b) is parallel to the lowest end of the spherical probe (m); the fixed ruler (c), the movable ruler (d) and the capacitive gate sensor circuit module (f) jointly form a capacitive gate sensor, and the capacitive gate sensor circuit module (f) comprises a capacitive gate sensor circuit;
the water depth measurement trigger circuit comprises a power supply (h), an led lamp (i), a buzzer (j) and a water depth recorder (k);
in the water depth measurement trigger circuit, a first circuit access point (I) is fixed on a spherical probe (m) of a spherical measurement probe (g) and is connected with an anode of a power supply (h); a second circuit access point (II) is connected into the slope surface water flow through a bed bottom contact pin (b), an led lamp (i), a buzzer (j) and a water depth recorder (k) are connected in parallel between the second circuit access point (II) and the cathode of a power supply (h) to form a loop of the power supply (h) -the water depth recorder (k), the buzzer (j), the led lamp (i) -the bed bottom contact pin (b) -the water flow-a measuring probe (g) -the power supply; and the third circuit access point (III) is electrically connected with the capacitive grating sensor circuit module (f) and is used for recording water depth data when the loop is conducted.
2. The device for bathymetry of a sloping surface current of claim 1, wherein: the plurality of legs are arranged symmetrically.
3. The device for bathymetry of a sloping surface current of claim 1, wherein: the number of the supporting legs is four.
4. The device for bathymetry of a sloping surface current of claim 1, wherein: the bottom surface of the bed bottom contact foot (b) is a flat plate.
5. The device for bathymetry of a sloping surface current of claim 4, wherein: the bed bottom contact foot (b) is a flat plate with the side length of 20cm multiplied by 20 cm.
6. The device for bathymetry of a sloping surface current of claim 1, wherein: the bed bottom contact foot (b) is a cylinder or a column with a rectangular cross section.
7. The device for bathymetry of a sloping surface current of claim 6, wherein: the bed bottom contact foot (b) is a cylinder or a column with the diameter or the side length of 3-5 mm.
8. A method of depth measurement of a water in a slope using the apparatus of any one of claims 1 to 7, wherein:
the method comprises the following steps:
1. selecting a proper type of bed bottom contact foot according to different slope shapes and measurement requirements;
2. moving the movable ruler (d) to the lowest point, making the lowest end of the spherical probe (m) of the measuring probe (g) coincide with the bottom surface of the bed bottom contact foot (b), and adjusting zero;
3. the fixed length (c) is perpendicular to the slope surface through the angle adjusting device (e), and the fixed support (a) is adjusted at the same time, so that the bed bottom contact foot (b) is in contact with the slope surface; the fixed angle adjusting device (e) and the fixed bracket (a) stabilize the measuring instrument;
4. drawing the movable ruler (d) to a first distance above the water surface where the spherical probe (m) of the measuring probe (g) is located; opening a switch of a water depth measurement trigger circuit, slowly pushing a movable ruler (d) downwards to enable a spherical probe (m) of a measurement probe (g) to contact the water surface, stopping moving the movable ruler (d) when a trigger sends a signal, automatically recording the water depth data by a water depth recorder (k), and finishing the measurement;
5. pulling up the movable ruler (d), and repeatedly measuring for a plurality of times according to the method of the step 4; and after multiple measurements, taking the average value to obtain the depth of the slope surface flow, wherein the measurement times are selected according to the measurement conditions.
9. The method of claim 8, wherein the method comprises: in step 4, the first distance is 1-2 cm.
10. The method of claim 8, wherein the method comprises: in step 5, the number of repeated measurements is 3-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125182.4A CN110823194A (en) | 2019-11-18 | 2019-11-18 | Method and device for measuring water depth of slope surface flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125182.4A CN110823194A (en) | 2019-11-18 | 2019-11-18 | Method and device for measuring water depth of slope surface flow |
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| CN110823194A true CN110823194A (en) | 2020-02-21 |
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| CN201911125182.4A Pending CN110823194A (en) | 2019-11-18 | 2019-11-18 | Method and device for measuring water depth of slope surface flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608542A (en) * | 2022-03-02 | 2022-06-10 | 浙江省水文管理中心 | Portable water depth on-line monitoring instrument without leveling |
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| CN102680732A (en) * | 2012-05-24 | 2012-09-19 | 中国农业大学 | Method and system for measuring velocity of sheet flow on slope |
| CN202692933U (en) * | 2012-07-24 | 2013-01-23 | 交通运输部公路科学研究所 | Medium depth monitoring device and vertical displacement measuring device |
| WO2014115326A1 (en) * | 2013-01-28 | 2014-07-31 | 中国電力株式会社 | Liquid depth measuring instrument |
| CN206514849U (en) * | 2017-02-14 | 2017-09-22 | 长江大学 | A kind of portable shallow water sounder |
| CN209387095U (en) * | 2018-11-16 | 2019-09-13 | 狄俊明 | A kind of evaporation tub level gauging device |
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2019
- 2019-11-18 CN CN201911125182.4A patent/CN110823194A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680732A (en) * | 2012-05-24 | 2012-09-19 | 中国农业大学 | Method and system for measuring velocity of sheet flow on slope |
| CN202692933U (en) * | 2012-07-24 | 2013-01-23 | 交通运输部公路科学研究所 | Medium depth monitoring device and vertical displacement measuring device |
| WO2014115326A1 (en) * | 2013-01-28 | 2014-07-31 | 中国電力株式会社 | Liquid depth measuring instrument |
| CN206514849U (en) * | 2017-02-14 | 2017-09-22 | 长江大学 | A kind of portable shallow water sounder |
| CN209387095U (en) * | 2018-11-16 | 2019-09-13 | 狄俊明 | A kind of evaporation tub level gauging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608542A (en) * | 2022-03-02 | 2022-06-10 | 浙江省水文管理中心 | Portable water depth on-line monitoring instrument without leveling |
| CN114608542B (en) * | 2022-03-02 | 2023-07-25 | 浙江省水文管理中心 | Portable water depth on-line monitor without leveling |
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Application publication date: 20200221 |
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