CN113686410A - Bluetooth bathymetric survey equipment - Google Patents
Bluetooth bathymetric survey equipment Download PDFInfo
- Publication number
- CN113686410A CN113686410A CN202110935455.2A CN202110935455A CN113686410A CN 113686410 A CN113686410 A CN 113686410A CN 202110935455 A CN202110935455 A CN 202110935455A CN 113686410 A CN113686410 A CN 113686410A
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- bluetooth
- bluetooth signal
- water
- water depth
- signal receiving
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention provides a water depth measuring device based on a Bluetooth technology and a Bluetooth device with low cost. The water depth measuring equipment comprises a Bluetooth signal transmitting device, a Bluetooth signal receiving device and a water depth calculating device; any one of the Bluetooth signal transmitting device and the Bluetooth signal receiving device is arranged on the water surface, and the other one is arranged in the water; the water depth calculating device estimates the water depth according to the signal attenuation introduced by the electromagnetic wave by the propagation path between the Bluetooth signal transmitting device and the Bluetooth signal receiving device. The water depth is measured by using the Bluetooth signal, the device is simple in structure, small in size and low in cost, the service life of the battery can be effectively prolonged by using the low-power-consumption Bluetooth technology, and the device is long in endurance time.
Description
Technical Field
The invention relates to the technical field of water depth measurement, in particular to Bluetooth water depth measurement equipment.
Background
Hydrologic monitoring is a complex and comprehensive system engineering for monitoring, measuring, analyzing, early warning and the like of the space-time distribution and change rule of natural water by a scientific method, and is a comprehensive subject. The hydrological monitoring system is suitable for hydrological departments to carry out real-time monitoring on hydrological parameters such as rivers, lakes, reservoirs, channels, underground water and the like, and the monitoring content comprises the following steps: water level, flow rate, rainfall (snow), evaporation, silt, slush, soil moisture, water quality, and the like. The hydrological monitoring system consists of four parts, namely a monitoring center, a communication network, front-end monitoring equipment and measuring equipment. The measuring devices include rain sensors, water level gauges, industrial cameras, and the like.
The rainfall phenomenon is the most common weather phenomenon in the nature, is closely related to the countryside, and the rainstorm can cause serious disasters to endanger the safety of lives and properties of people. The severe impact of rainstorms on urban traffic is one of the important items.
Therefore, the water level and depth measurement probe apparatus has a wide range of applications. The water level and depth observation instruments mainly comprise bubble type, pressure type, float type, non-contact radar water level gauges and the like, and pressure type depth measurement equipment is mostly used. However, the existing water level and depth observation instruments are high in cost, and the disadvantage is that the large-scale application of the water depth observation instruments is hindered to a certain extent.
Disclosure of Invention
The invention provides a water depth measuring device based on a Bluetooth technology and a Bluetooth device with low cost.
The technical problem to be solved by the invention is realized by the following technical scheme:
the invention provides a Bluetooth water depth measuring device, which is characterized in that: the system comprises a Bluetooth signal transmitting device, a Bluetooth signal receiving device and a water depth calculating device; any one of the Bluetooth signal transmitting device and the Bluetooth signal receiving device is arranged on the water surface, and the other one is arranged in the water; the water depth calculating device estimates the water depth according to the signal attenuation introduced by the electromagnetic wave by the propagation path between the Bluetooth signal transmitting device and the Bluetooth signal receiving device.
Preferably, the principle according to which the water depth calculating means estimates the water depth is a formula
Wherein d is the calculated distance, i.e. the length of the propagation path; RSSI is received signal strength, A represents the signal strength when the Bluetooth signal transmitting device and the Bluetooth signal receiving device are separated by 1 meter, and the unit is dB or dBm; n is an environmental attenuation factor.
Preferably, the part of the propagation path between the bluetooth signal transmitting device and the bluetooth signal receiving device on the water surface has negligible signal attenuation introduced by electromagnetic waves.
The invention has the advantages that the Bluetooth signal is used for measuring the water depth, the equipment has simple structure, small volume and low cost, the application of the low-power consumption Bluetooth technology can effectively prolong the service time of the battery, and the equipment has long endurance time.
Drawings
FIG. 1 is a schematic view of an application scenario of the Bluetooth bathymetric survey apparatus of the present invention;
fig. 2 is a block diagram of the signal receiving process of the bluetooth bathymetric survey apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic view of an application scenario of the bluetooth bathymetric survey device of the embodiment. The boxes in the figure represent an object containing water or water flow, such as a river, lake or urban road underpass tunnel. A Bluetooth signal receiving device is fixedly arranged above the water surface, and a Bluetooth signal receiving device is arranged on a riverbed or a roadbed right below the Bluetooth signal receiving device.
Radio waves travel in a medium and the signal power attenuates with increasing propagation distance. The signal attenuation and the propagation distance are exponentially related when the signal propagates in the same medium. The higher the conductivity of the medium, the greater the attenuation. Typically, the attenuation in the atmosphere is only 1.5 to 3 dB/Mm, while the attenuation in water is 0.2 to 10 dB/m. I.e. the attenuation of radio waves in water is much greater than in air.
The Bluetooth water depth measuring equipment is characterized in that a fixed Bluetooth signal receiving device is arranged above the water surface and close to the water surface, and a Bluetooth signal transmitting device is arranged on a riverbed or a roadbed right below the Bluetooth signal receiving device. So that the bluetooth radio signal actually passes through two media, water and air on the water surface. From the foregoing analysis, the attenuation of radio waves in water is much greater than that in air, so that the power attenuation introduced by the propagation of radio waves in air is negligible. Under the precondition, the following relational expression is established
Fig. 2 is a signal receiving processing block diagram of the bluetooth bathymetric survey device of the present embodiment. Electromagnetic wave signals transmitted by the Bluetooth signal transmitting device reach a de-spreading module in the Bluetooth signal receiving device through a wireless channel, and the de-spreading module de-spreads received frequency modulation spread spectrum signals by using pseudo-random codes from a pseudo-random code generator; then the demodulation module demodulates the despread frequency shift keying signal or phase shift keying signal, and outputs the modulated information and various parameters measured by the receiver. The output information includes real-time RSSI parameters measured by the receiver. The RSSI parameter is provided to a water depth calculation device using a formula
Claims (3)
1. The utility model provides a bluetooth bathymetric survey equipment which characterized in that: the system comprises a Bluetooth signal transmitting device, a Bluetooth signal receiving device and a water depth calculating device; any one of the Bluetooth signal transmitting device and the Bluetooth signal receiving device is arranged on the water surface, and the other one is arranged in the water; the water depth calculating device estimates the water depth according to the signal attenuation introduced by the electromagnetic wave by the propagation path between the Bluetooth signal transmitting device and the Bluetooth signal receiving device.
2. The utility model provides a bluetooth bathymetric survey equipment which characterized in that: the principle of the water depth calculation device for estimating the water depth is a formula
Wherein d is the calculated distance, i.e. the length of the propagation path; RSSI is received signal strength, A represents the signal strength when the Bluetooth signal transmitting device and the Bluetooth signal receiving device are separated by 1 meter, and the unit is dB or dBm; n is an environmental attenuation factor.
3. The utility model provides a bluetooth bathymetric survey equipment which characterized in that: the part of the propagation path between the Bluetooth signal transmitting device and the Bluetooth signal receiving device on the water surface has negligible signal attenuation introduced by electromagnetic waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110935455.2A CN113686410A (en) | 2021-08-16 | 2021-08-16 | Bluetooth bathymetric survey equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110935455.2A CN113686410A (en) | 2021-08-16 | 2021-08-16 | Bluetooth bathymetric survey equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113686410A true CN113686410A (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110935455.2A Pending CN113686410A (en) | 2021-08-16 | 2021-08-16 | Bluetooth bathymetric survey equipment |
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| Country | Link |
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| CN (1) | CN113686410A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759390A (en) * | 2012-07-17 | 2012-10-31 | 成都九洲电子信息系统股份有限公司 | Water level monitoring method by radio frequency communication method |
| CN105628081A (en) * | 2014-11-26 | 2016-06-01 | 三星电子株式会社 | Method and apparatus for detecting that a device is immersed in a liquid |
| CN107907187A (en) * | 2017-10-31 | 2018-04-13 | 中国科学院武汉岩土力学研究所 | The measuring method and device of the gas-liquid interface depth of salt hole air reserved storeroom |
| CN108551526A (en) * | 2018-04-19 | 2018-09-18 | 深圳市沃特沃德股份有限公司 | Calculate the method and device of distance |
| US20180356512A1 (en) * | 2017-06-13 | 2018-12-13 | Saudi Arabian Oil Company | Rfid triangulated tank gauging and inventory management system |
-
2021
- 2021-08-16 CN CN202110935455.2A patent/CN113686410A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759390A (en) * | 2012-07-17 | 2012-10-31 | 成都九洲电子信息系统股份有限公司 | Water level monitoring method by radio frequency communication method |
| CN105628081A (en) * | 2014-11-26 | 2016-06-01 | 三星电子株式会社 | Method and apparatus for detecting that a device is immersed in a liquid |
| US20180356512A1 (en) * | 2017-06-13 | 2018-12-13 | Saudi Arabian Oil Company | Rfid triangulated tank gauging and inventory management system |
| CN107907187A (en) * | 2017-10-31 | 2018-04-13 | 中国科学院武汉岩土力学研究所 | The measuring method and device of the gas-liquid interface depth of salt hole air reserved storeroom |
| CN108551526A (en) * | 2018-04-19 | 2018-09-18 | 深圳市沃特沃德股份有限公司 | Calculate the method and device of distance |
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Application publication date: 20211123 |