CN111998912B - Integrated full-range inspection well water level monitoring equipment and monitoring method - Google Patents
Integrated full-range inspection well water level monitoring equipment and monitoring method Download PDFInfo
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- CN111998912B CN111998912B CN202010860894.7A CN202010860894A CN111998912B CN 111998912 B CN111998912 B CN 111998912B CN 202010860894 A CN202010860894 A CN 202010860894A CN 111998912 B CN111998912 B CN 111998912B
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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
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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
- G01F23/14—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 measurement of pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
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Abstract
The invention discloses integrated full-range inspection well water level monitoring equipment and a monitoring method, wherein the equipment comprises a absolute pressure type pressure sensor, a radar water level sensor, a controller, a data transmission unit and a power supply management unit, wherein the controller is respectively connected with the absolute pressure type pressure sensor, the radar water level sensor, the data transmission unit and the power supply management unit; the controller is used for collecting water level data measured by the absolute pressure type pressure sensor and the radar water level sensor, obtaining actual inspection well water level data through quantitative segmentation calculation processing, and sending the inspection well water level data to the data transmission unit; and the data transmission unit is used for transmitting the inspection well water level data to the data center through the transmitting antenna. The device adopts an integrated design, integrates measurement and acquisition, data transmission, power supply and the like, adopts a portable detachable hoisting structure, has good sealing performance, and is suitable for various severe environments such as urban waterlogging, underground drainage pipe network, sewage well monitoring and the like.
Description
Technical Field
The invention relates to water level monitoring equipment, in particular to integrated full-range inspection well water level monitoring equipment and a monitoring method, and belongs to the technical field of water level monitoring.
Background
The rapid development and construction of urbanization causes the increase of the surface runoff coefficient, and the urban waterlogging situation is increasingly severe. One of the important reasons for urban inland inundation is the insufficient drainage capacity of underground pipe networks. Therefore, the supervision of the drainage pipe network is enhanced in each large city. The inspection well water level is a core object of the drainage pipe network supervision, and the inspection well water level monitoring needs are huge, but because the underground environment is complex and severe, no fully satisfactory measuring equipment exists yet.
The existing equipment for monitoring the water level of the inspection well comprises an ultrasonic water level meter, an acoustic water level meter, a pressure water level meter and the like, and has respective defects. The ultrasonic water level gauge is easily affected by factors such as temperature and humidity, a moist environment in the pit and larger temperature change easily cause measurement errors, and the ultrasonic wave has a measurement blind area, so that the condition of the inspection well in high water level cannot be monitored. The pressure water level gauge is generally based on gauge pressure measurement, an air duct needs to be reserved, and a probe part is easy to be impacted by underground water flow and hang sundries. The acoustic wave water level gauge needs to be installed by the construction of the vertical rod and the road, the engineering quantity is large, and the acoustic wave water level gauge cannot be installed on an inspection well in the middle of a road.
In summary, the non-contact type measuring sensor is convenient to install and maintain, but the contact type sensor such as a measuring blind area, a pressure water level gauge and the like is required to be lowered to the bottom of the well and is easily affected by sundries, and the atmospheric pressure cannot be directly measured after the equipment is completely submerged, so that the non-contact type measuring sensor and the pressure water level gauge have limitations. The absolute pressure type pressure sensor can deviate by 20 cm to 30cm without atmospheric pressure compensation, and cannot be directly used. Therefore, a new inspection well measuring device is urgently needed at present, and not only can be conveniently and quickly installed in a non-contact mode, but also can realize full-range measurement.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides integrated full-range inspection well water level monitoring equipment which adopts an integrated design, integrates measurement acquisition, data transmission, power supply and the like, adopts a portable detachable hoisting structure, has good sealing performance, and is suitable for various severe environments such as urban waterlogging, underground drainage pipe networks, sewage well monitoring and the like.
The invention further aims to provide a method for monitoring the water level of the inspection well.
The aim of the invention can be achieved by adopting the following technical scheme:
the integrated full-range inspection well water level monitoring device comprises a pressure-proof pressure sensor, a radar water level sensor, a controller, a data transmission unit and a power supply management unit, wherein the controller is respectively connected with the pressure-proof pressure sensor, the radar water level sensor, the data transmission unit and the power supply management unit;
the controller is used for collecting water level data measured by the absolute pressure type pressure sensor and the radar water level sensor, obtaining actual inspection well water level data through quantitative segmentation calculation processing, and sending the inspection well water level data to the data transmission unit;
and the data transmission unit is used for transmitting the inspection well water level data to the data center through the transmitting antenna.
Further, the step of calculating and processing according to the schedule section to obtain actual inspection well water level data specifically comprises the following steps:
if the measuring range is below the absolute pressure type pressure sensor, finishing the inspection well water level measurement through the radar water level sensor, wherein the absolute pressure type pressure sensor is in a closed state;
if the measuring range is a measuring range in which the radar water level sensor and the absolute pressure type pressure sensor are overlapped in a crossing mode, the radar water level sensor is used for measuring the water level of the inspection well, and meanwhile the absolute pressure type pressure sensor is started to calibrate the absolute pressure type pressure sensor;
if the measuring range is the measuring range from the radar blind area range to the overflow of the water level in the inspection well, the inspection well water level measurement is completed through the absolute pressure type pressure sensor, and the radar water level sensor is in a closed state.
The system further comprises a real-time clock chip which is respectively connected with the controller and the power supply management unit and used for waking up the controller and the data transmission unit at regular time through the power supply management unit.
Further, the device also comprises a built-in battery and a charging interface, wherein the charging interface is connected with the built-in battery, and the built-in battery is respectively connected with the controller and the power supply management unit and is used for integrally supplying power to the device.
Further, the intelligent control device further comprises a magnetic switch and a Bluetooth interface, wherein the Bluetooth interface is connected with the controller, and the magnetic switch is connected with the power supply management unit and used for waking up the controller and the data transmission unit through the power supply management unit and triggering the Bluetooth interface to operate.
Further, the inspection well inspection device also comprises a detachable support, and the equipment is hoisted at an inspection well measurement position through the detachable support.
The other object of the invention can be achieved by adopting the following technical scheme:
a method of inspection well water level monitoring, the method comprising:
if the water surface is in the range first partial interval, measuring and outputting the distance between the radar water level sensor and the water surface through the radar water level sensor, and calculating to obtain the water level of the inspection well; wherein, the first partial interval of the measuring range is the measuring range below the absolute pressure type pressure sensor;
if the water surface rises to the range second partial interval, measuring and outputting the distance between the radar water level sensor and the water surface through the radar water level sensor, calculating to obtain the water level of the inspection well, starting the absolute pressure sensor, calibrating the absolute pressure sensor, and obtaining a calibration formula of the absolute pressure sensor; the second partial range of the measuring range is a measuring range where the radar water level sensor and the absolute pressure type pressure sensor are overlapped in a crossing mode;
if the water surface rises to the third partial interval of the measuring range, calculating to obtain the water level of the inspection well through a calibration formula of the absolute pressure type pressure sensor; the third part interval of the measuring range is a measuring range from the radar blind area range to water level overflow in the inspection well.
Further, the calibration is performed by an absolute pressure type pressure sensor, and the following formula is shown:
H water and its preparation method ＝k·P Water and its preparation method ＝k(P Absolute pressure -P Atmospheric air )＝k·P Absolute pressure -k·P Atmospheric air ＝k·P Absolute pressure -Δb
＝H Absolute pressure -Δb
＝H-(L1-L2-L3-L4)
＝L1-L2-H1-(L1-L2-L3-L4)
＝L3+L4-H1
The calibration formula of the absolute pressure type pressure sensor comprises the following formula:
wherein k=1/(ρg), where ρ is water density, g is gravity acceleration, both are constants, H is inspection well water level, H1 is distance between radar water level sensor and water surface, L1 is well depth of inspection well, L2 is distance between radar water level sensor and wellhead, L3 is blind area range of radar water level sensor, P Water and its preparation method Is the pressure of static water body, P Atmospheric air Is the pressure of the atmospheric pressure.
Further, the inspection well water level is calculated by a calibration formula of the absolute pressure type pressure sensor, and the following formula is adopted:
H＝H absolute pressure -Δb+(L1-L2-L3-L4)
Wherein L1-L2-L3-L4 are position offset values of the absolute pressure sensor.
Further, the method further comprises:
if the water surface falls to the range second partial section, the radar water level sensor resumes working, at this time, the data measured by the radar water level sensor is compared with the data measured by the absolute pressure type pressure sensor, if the data is smaller than or equal to the specified deviation range, the data quality of the absolute pressure type pressure sensor is judged to meet the requirement, otherwise, the absolute pressure type pressure sensor is judged to have faults, and the judgment method is as follows:
δ≥|max(H i (absolute pressure) -H i (Radar) )|,i＝1,2,…n
Wherein delta is a specified deviation range, H i (absolute pressure) Represents the water level measured by the absolute pressure type pressure sensor, H i (Radar) Representing the water level measured by the radar sensor, judging that the data quality of the absolute pressure sensor meets the requirement if the above formula is met, judging that the absolute pressure sensor fails if the above formula is not met, and measuring the data of the third partial intervalAnd if invalid, sending a fault alarm signal to the data center through the data transmission unit.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can collect water level data measured by the absolute pressure type pressure sensor and the radar water level sensor through the controller, and can obtain actual inspection well water level data according to the process of calculation and segmentation, so as to realize full-range measurement, and the inspection well water level data is sent to the data transmission unit, and the data transmission unit sends the inspection well water level data to the data center through the transmitting antenna, thereby integrating measurement collection, data transmission, power supply and the like, and being applicable to various severe environments such as urban waterlogging, underground drainage pipe networks, sewage well monitoring and the like.
2. The invention adopts the process of calculating and processing according to the measurement section, the measurement range can be divided into three parts, the first measurement range is the measurement range below the absolute pressure type pressure sensor, the inspection well water level measurement is completed through the radar water level sensor, the absolute pressure type pressure sensor is in a closed state at the moment, the second measurement range is the measurement range which is formed by the cross overlapping of the radar water level sensor and the absolute pressure type pressure sensor, the inspection well water level measurement is completed through the radar water level sensor, the absolute pressure type pressure sensor is started at the same time, the calibration is carried out on the absolute pressure sensor, the atmospheric pressure compensation is not needed, the third measurement range is the range of the radar blind area, the water level overflows into the well, the water level measurement is completed through the absolute pressure type pressure sensor, the radar water level sensor is in a closed state at the moment, the full-range measurement of the inspection well water level can be realized through dividing the three parts, and the combination of the non-contact measurement and the zero blind area is realized.
3. When the water level is reduced from the third measurement range to the second measurement range, the radar water level sensor resumes working, at the moment, the data measured by the radar water level sensor is compared with the data measured by the absolute pressure sensor, when the data is smaller than or equal to the specified deviation range, the data quality of the absolute pressure sensor is considered to meet the requirement, otherwise, the absolute pressure sensor is considered to be faulty, a fault alarm signal is sent to the data center through the data transmission unit, and the working personnel can be reminded of maintaining the equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structural diagram of an integrated full-range inspection well water level monitoring device according to embodiment 1 of the present invention.
Fig. 2 is a block diagram of an integrated full-range inspection well water level monitoring device according to embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of inspection well water level monitoring of the integrated full-range inspection well water level monitoring device of embodiment 1 of the present invention.
Fig. 4 is a flowchart of inspection well water level monitoring of the integrated full-range inspection well water level monitoring device of embodiment 1 of the present invention.
The wireless remote control system comprises a machine body 101, a pressure-isolating pressure sensor 102, a radar water level sensor 103, a controller 104, a data transmission unit 105, a power supply management unit 106, a transmitting antenna 107, a real-time clock chip 108, a built-in battery 109, a charging interface 110, a magnetic switch 111, a Bluetooth interface 112 and a detachable bracket 113.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
Example 1:
as shown in fig. 1 and 2, the present embodiment provides an integrated full-range inspection well water level monitoring device, which includes a machine body 101, a pressure-insulation type pressure sensor 102, a radar water level sensor 103, a controller 104, a data transmission unit 105 and a power supply management unit 106, wherein the pressure-insulation type pressure sensor 102 and the radar water level sensor 103 are disposed on the machine body 101, specifically, the pressure-insulation type pressure sensor 102 is disposed at the bottom of the machine body 101 through a connecting rod, the radar water level sensor 103 is disposed at the bottom of the machine body 101, the controller 104, the data transmission unit 105 and the power supply management unit 106 are disposed in the machine body 101, and the controller 104 is respectively connected with the pressure-insulation type pressure sensor 102, the radar water level sensor 103, the data transmission unit (Data Transfer Unit, abbreviated as DTU) 105 and the power supply management unit 106.
The controller 104 can collect water level data measured by the absolute pressure type pressure sensor 102 and the radar water level sensor 103, obtain actual inspection well water level data according to the process of the calculation and the segmentation, and send the inspection well water level data to the data transmission unit 105; the actual inspection well water level data is obtained through calculation according to the scale segmentation, and the method specifically comprises the following steps:
if the measurement range is below the absolute pressure type pressure sensor 102, the inspection well water level measurement is completed through the radar water level sensor 103, and the absolute pressure type pressure sensor 102 is in a closed state at this time.
If the measurement range is the measurement range where the radar water level sensor 103 and the absolute pressure type pressure sensor 102 are overlapped, the radar water level sensor 103 is used for completing the inspection well water level measurement, and meanwhile, the absolute pressure type pressure sensor 102 is started to calibrate the absolute pressure type pressure sensor 102 without additional atmospheric pressure compensation.
If the measuring range is the measuring range from the radar blind area range to the overflow of the water level in the inspection well, the inspection well water level measurement is completed through the absolute pressure type pressure sensor 102, and the radar water level sensor 103 is in a closed state.
The data transmission unit 105 can send the inspection well water level data to the data center through the transmitting antenna 107, mobile/telecom dual-card switching can be adopted, the quality of two network signals is read before the data starts wireless transmission, one path with better signal quality is selected for priority transmission, and when the transmission fails due to overtime, the data transmission unit 105 is automatically switched to the other path for transmission, so that the transmission reliability is ensured, the data transmission unit 105 adopts an NB-IOT network preferentially, and the transmitting antenna 107 is arranged on the machine body 101, and particularly arranged on the top of the machine body 101.
In order to reduce the frequency of use of the controller 104 and the data transmission unit 105, the apparatus of this embodiment may further include a Real Time Clock (RTC) 108, where the Real Time Clock 108 is disposed in the machine body 101 and is connected to the controller 104 and the power management unit 106, respectively, and the controller 104 and the data transmission unit 105 can be periodically awakened by the power management unit 106, that is, the controller 104 and the data transmission unit 105 are always in a sleep state, when a fixed Time interval arrives, the controller 104 and the data transmission unit 105 are awakened by the Real Time Clock 108, and after each acquisition and transmission, the power supply of the awakening controller 104 and the data transmission unit 105 is turned off, and the sleep state is entered again to wait for the next Time interval to arrive.
Further, the device of this embodiment may further include a built-in battery 109 and a charging interface 110, where the built-in battery 109 and the charging interface 110 are disposed in the body 101, the body 101 is provided with a charging hole at a corresponding position of the charging interface 110, the charging interface 110 is connected to the built-in battery 109, and the built-in battery 109 is rechargeable and is respectively connected to the controller 104, the power supply management unit 106, and the real-time clock chip 108, so as to supply power to the whole device, and when the electric quantity of the device is insufficient, the whole device is taken out from the inspection well, and then the charging interface 110 is connected to conveniently charge the device without disassembling the device for charging; preferably, the charging interface 110 may be equipped with a waterproof rubber plug.
Further, the device of the embodiment may further include a magnetic switch 111 and a bluetooth interface 112, where the magnetic switch 111 and the bluetooth interface 112 are disposed in the body 101, and the magnetic switch 111 is connected to the power management unit 106, so that the controller 104 and the data transmission unit 105 can be awakened manually, specifically, the controller 104 and the data transmission unit 105 are awakened through the power management unit 106, without waiting for the real-time clock chip 108 to awaken; the bluetooth interface 112 is connected with the controller 104, the magnetic switch 111 can trigger the bluetooth interface 112 to operate, bluetooth connection is carried out with equipment through a mobile terminal (mobile phone, tablet computer and the like), water level information viewing, parameter configuration, history storage data acquisition and equipment program upgrading can be realized by utilizing an APP installed on the mobile terminal, the switch can be closed by utilizing a magnet to be close to the magnetic switch position, and when the magnet is far away from the magnetic switch position, the switch is opened, and the equipment is powered down to enter a low-power consumption mode.
Further, the machine body 101 of the embodiment can be attached with a two-dimensional code, and the two-dimensional code can be scanned by WeChat or APP application of the mobile terminal to enter a monitoring page, so that basic information such as inspection well real-time water level data display, equipment installation time, installation site, management personnel and the like, site operation and maintenance statistics and the like are provided.
In order to facilitate the installation and the disassembly of the equipment, the equipment of the embodiment further comprises a detachable support 113, wherein the detachable support 113 is arranged on one side of the machine body 101, the equipment can be hoisted at the inspection well measuring position through the cooperation of the detachable support 113 and a screw, and the equipment can be quickly and conveniently taken out through unscrewing the screw without influencing the routine maintenance and the tube culture of the inspection well.
As shown in fig. 3 and 4, the embodiment also provides a method for monitoring the water level of an inspection well, which is implemented based on the above equipment and comprises the following steps:
s401, if the water surface is in a range first partial section, measuring and outputting the distance between the radar water level sensor and the water surface through the radar water level sensor, and calculating to obtain the water level of the inspection well.
In the step, a range first part interval is a measuring range below an absolute pressure type pressure sensor, and the water level of an inspection well is calculated by adopting the following formula:
H＝L1-L2-H1 (1)
wherein, H is the inspection well water level, H1 is the distance between the radar water level sensor and the water surface, L1 is the well depth of the inspection well, and L2 is the distance between the radar water level sensor and the wellhead.
And S402, if the water surface rises to the second partial interval of the measuring range, measuring and outputting the distance between the radar water level sensor and the water surface through the radar water level sensor, calculating to obtain the water level of the inspection well, starting the absolute pressure sensor, calibrating the absolute pressure sensor, and obtaining a calibration formula of the absolute pressure sensor.
In this step, the second partial interval of the measuring range is a measurement range where the radar water level sensor and the absolute pressure type pressure sensor are overlapped, the inspection well water level is calculated by adopting the formula (1), but the calibration is performed by the absolute pressure type pressure sensor, and the calibration method is as follows:
the pressure measured by the absolute pressure sensor is actually the pressure P of the static water body Water and its preparation method Adding the pressure P of the atmospheric pressure Atmospheric air The water depth is in direct proportion to the water pressure, so that the atmospheric pressure is subtracted to obtain an accurate water depth value.
Where k=1/(ρg), where ρ is the water density and g is the gravitational acceleration, which are both constants, and Δb is considered to be unchanged since the change of atmospheric pressure in a short time is negligible. Therefore, according to the measured value H1 of the radar water level gauge and H of the absolute pressure type sensor Absolute pressure And (3) obtaining delta b, averaging through multiple measurements of the interval to obtain a calibration formula of the absolute pressure sensor, and recording the obtained delta b, wherein the formula is as follows:
and S403, if the water surface rises to the third partial interval of the measuring range, calculating to obtain the water level of the inspection well through a calibration formula of the absolute pressure type pressure sensor.
In the step, the third part interval of the measuring range is a measuring range from the radar blind area range to the water level overflow in the inspection well, the calibration formula is calculated by the second part interval of the measuring range, and the formula for solving the actual water depth of the inspection well by the absolute pressure sensor is as follows:
H＝H absolute pressure -Δb+(L1-L2-L3-L4) (4)
Wherein L1-L2-L3-L4 are position offset values of the absolute pressure sensor.
Further, in order to check the data quality, the inspection well water level monitoring method of the embodiment further includes:
s404, if the water surface descends to a second partial interval of the measuring range, the radar water level sensor resumes working, at this time, data measured by the radar water level sensor is compared with data measured by the absolute pressure sensor, if the data measured by the radar water level sensor is smaller than or equal to a specified deviation range, the data quality of the absolute pressure sensor is judged to meet the requirement, otherwise, the absolute pressure sensor is judged to be faulty, and a fault alarm signal is sent to a data center through a data transmission unit.
The judging method is as follows:
δ≥|max(H i (absolute pressure) -H i (Radar) )|,i＝1,2,…n (5)
Wherein delta is a specified deviation range, H i (absolute pressure) Represents the water level measured by the absolute pressure type pressure sensor, H i (Radar) And (3) representing the water level measured by the radar sensor, if the formula (5) is satisfied, judging that the data quality of the absolute pressure sensor meets the requirement, and if the formula is not satisfied, judging that the absolute pressure sensor fails and the data of the third partial interval of the measuring range is invalid.
Example 2:
the embodiment is a specific application example, the length of a connecting rod of the absolute pressure type pressure sensor is 30cm, the radar dead zone is 15cm, namely, the absolute pressure type pressure sensor and the radar water level sensor have an overlapping section with a measuring range of 15 cm.
Assuming that the water level continuously rises, after entering a range second part interval, in the interval, data sequentially measured by the radar water level sensor are A1, A2 and … … A10, and meanwhile, data sequentially measured by the absolute pressure type pressure sensor are B1, B2 and … … B10, and the radar water level sensor has the following steps according to a calibration formula:
but still uses the result of the radar level sensor as a measured water level output at this time.
After the water level continuously rises to enter the third part interval, the water level of the inspection well can be obtained after the calibration of the absolute pressure type pressure sensor:
H＝H absolute pressure -Δb+(L1-L2-L3-L4) (7)
In summary, the controller can collect water level data measured by the absolute pressure type pressure sensor and the radar water level sensor, actual water level data of the inspection well can be obtained through quantitative segmentation calculation processing, so that full-range measurement is realized, the water level data of the inspection well is sent to the data transmission unit, the data transmission unit sends the water level data of the inspection well to the data center through the transmitting antenna, measurement collection, data transmission, power supply and the like are integrated, and the method is suitable for various severe environments such as urban waterlogging, underground drainage pipe networks, sewage well monitoring and the like; the measurement range can be divided into three parts by adopting the process of calculation and segmentation, firstly, the measurement range below the absolute pressure type pressure sensor is used for completing the inspection well water level measurement through the radar water level sensor, at the moment, the absolute pressure type pressure sensor is in a closed state, secondly, the radar water level sensor and the absolute pressure type pressure sensor are used for completing the inspection well water level measurement through the radar water level sensor, meanwhile, the absolute pressure type pressure sensor is started to calibrate the absolute pressure type pressure sensor, the atmospheric pressure compensation is not needed, thirdly, the water level overflows from the radar dead zone range to the inside of the well, the water level measurement is completed through the absolute pressure type pressure sensor, and the three parts realize full-range measurement, so that the measurement accuracy of the inspection well water level can be improved.
The above-mentioned embodiments are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can make equivalent substitutions or modifications according to the technical solution and the inventive concept of the present invention within the scope of the present invention disclosed in the present invention patent, and all those skilled in the art belong to the protection scope of the present invention.
Claims (7)
1. The integrated full-range inspection well water level monitoring device is characterized by comprising a pressure-proof pressure sensor, a radar water level sensor, a controller, a data transmission unit and a power supply management unit, wherein the controller is respectively connected with the pressure-proof pressure sensor, the radar water level sensor, the data transmission unit and the power supply management unit;
the controller is used for collecting water level data measured by the absolute pressure type pressure sensor and the radar water level sensor, obtaining actual inspection well water level data through quantitative segmentation calculation processing, and sending the inspection well water level data to the data transmission unit;
the data transmission unit is used for transmitting inspection well water level data to a data center through a transmitting antenna;
the actual inspection well water level data is obtained through the calculation and processing according to the schedule section, and the method specifically comprises the following steps:
taking a measuring range below the absolute pressure type pressure sensor as a first measuring range, and if the measuring range is the first measuring range, finishing inspection well water level measurement through a radar water level sensor, wherein the absolute pressure type pressure sensor is in a closed state;
taking a measuring range of which the radar water level sensor and the absolute pressure type pressure sensor are overlapped in a crossing mode as a second measuring range, if the measuring range is the second measuring range, finishing inspection well water level measurement through the radar water level sensor, and starting the absolute pressure type pressure sensor to calibrate the absolute pressure type pressure sensor;
taking a measuring range from the radar dead zone range to overflow of water level in the inspection well as a third measuring range, if the measuring range is the third measuring range, completing inspection well water level measurement through the absolute pressure type pressure sensor, wherein the radar water level sensor is in a closed state, and the completion of inspection well water level measurement through the absolute pressure type pressure sensor means that the inspection well water level is obtained through calculation through a calibration formula of the absolute pressure type pressure sensor;
if the water level is reduced from the third measuring range to the second measuring range, the radar water level sensor resumes working, at this time, the data measured by the radar water level sensor is compared with the data measured by the absolute pressure type pressure sensor, if the difference value between the data measured by the absolute pressure type pressure sensor and the data measured by the radar water level sensor is smaller than or equal to the specified deviation range, the data quality of the absolute pressure type pressure sensor is judged to meet the requirement, otherwise, the absolute pressure sensor is judged to have faults, and a fault alarm signal is sent to a data center through a data transmission unit;
the absolute pressure type pressure sensor is calibrated, and the following formula is adopted:
H water and its preparation method ＝k·P Water and its preparation method ＝k(P Absolute pressure -P Atmospheric air )＝k·P Absolute pressure -k·P Atmospheric air ＝k·P Absolute pressure -Δb
＝H Absolute pressure -Δb
＝H-(L1-L2-L3-L4)
＝L1-L2-H1-(L1-L2-L3-L4)
＝L3+L4-H1
The calibration formula of the absolute pressure type pressure sensor comprises the following formula:
wherein k=1/(ρg), ρ is water density, g is gravity acceleration, both are constants, H is inspection well water level, H1 is distance between radar water level sensor and water surface, L1 is well depth of inspection well, L2 is distance between radar water level sensor and wellhead, L3 is blind area range of radar water level sensor, P Water and its preparation method Is the pressure of static water body, P Atmospheric air Is the pressure of the atmospheric pressure.
2. The integrated full-scale inspection well water level monitoring device according to claim 1, further comprising a real-time clock chip, wherein the real-time clock chip is respectively connected with the controller and the power supply management unit and is used for waking up the controller and the data transmission unit at regular time through the power supply management unit.
3. The integrated full-range inspection well water level monitoring device according to claim 1, further comprising a built-in battery and a charging interface, wherein the charging interface is connected with the built-in battery, and the built-in battery is respectively connected with the controller and the power supply management unit and is used for integrally supplying power to the device.
4. The integrated full-scale inspection well water level monitoring device of claim 1, further comprising a magnetic switch and a bluetooth interface, wherein the bluetooth interface is connected with the controller, and the magnetic switch is connected with the power management unit and is used for waking up the controller and the data transmission unit through the power management unit and triggering the bluetooth interface to operate.
5. The integrated full-scale inspection well water level monitoring device of claim 1, further comprising a detachable bracket, wherein the device is hoisted at an inspection well measurement position by the detachable bracket.
6. An inspection well water level monitoring method, implemented based on the integrated full-range inspection well water level monitoring device according to any one of claims 1-5, characterized in that the method comprises:
if the water surface is in the range first partial interval, measuring and outputting the distance between the radar water level sensor and the water surface through the radar water level sensor, and calculating to obtain the water level of the inspection well; wherein, the first partial interval of the measuring range is the measuring range below the absolute pressure type pressure sensor;
if the water surface rises to the range second partial interval, measuring and outputting the distance between the radar water level sensor and the water surface through the radar water level sensor, calculating to obtain the water level of the inspection well, starting the absolute pressure sensor, calibrating the absolute pressure sensor, and obtaining a calibration formula of the absolute pressure sensor; the second partial range of the measuring range is a measuring range where the radar water level sensor and the absolute pressure type pressure sensor are overlapped in a crossing mode;
if the water surface rises to the third partial interval of the measuring range, calculating to obtain the water level of the inspection well through a calibration formula of the absolute pressure type pressure sensor; the third part interval of the measuring range is a measuring range from the radar blind area range to water level overflow in the inspection well;
if the water surface falls to the range second partial section, the radar water level sensor resumes working, at this time, the data measured by the radar water level sensor is compared with the data measured by the absolute pressure sensor, if the difference value between the data measured by the absolute pressure sensor and the data measured by the radar water level sensor is smaller than or equal to the specified deviation range, the data quality of the absolute pressure sensor is judged to meet the requirement, otherwise, the absolute pressure sensor is judged to have faults, and the judgment method is as follows:
δ≥|max(H i (absolute pressure) -H i (Radar) )|,i＝1,2,…n
Wherein delta is a specified deviation range, H i (absolute pressure) Represents the water level measured by the absolute pressure type pressure sensor, H i (Radar) The water level measured by the radar sensor is represented, if the above formula is met, the data quality of the absolute pressure sensor is judged to meet the requirement, if the above formula is not met, the absolute pressure sensor is judged to have faults, the data in the third part interval of the measuring range is invalid, and a fault alarm signal is sent to a data center through a data transmission unit;
calibrating the absolute pressure type pressure sensor, wherein the absolute pressure type pressure sensor comprises the following formula:
H water and its preparation method ＝k·P Water and its preparation method ＝k(P Absolute pressure -P Atmospheric air )＝k·P Absolute pressure -k·P Atmospheric air ＝k·P Absolute pressure -Δb
＝H Absolute pressure -Δb
＝H-(L1-L2-L3-L4)
＝L1-L2-H1-(L1-L2-L3-L4)
＝L3+L4-H1
The calibration formula of the absolute pressure type pressure sensor comprises the following formula:
wherein k=1/(ρg), ρ is water density, g is gravity acceleration, both are constants, H is inspection well water level, H1 is distance between radar water level sensor and water surface, L1 is well depth of inspection well, L2 is distance between radar water level sensor and wellhead, L3 is blind area range of radar water level sensor, P Water and its preparation method Is the pressure of static water body, P Atmospheric air Is the pressure of the atmospheric pressure.
7. The inspection well water level monitoring method according to claim 6, wherein the inspection well water level is calculated by a calibration formula of an absolute pressure type pressure sensor, and the formula is as follows:
H＝H absolute pressure -Δb+(L1-L2-L3-L4)
Wherein L1-L2-L3-L4 are position offset values of the absolute pressure sensor.
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| CN112833987A (en) * | 2020-12-16 | 2021-05-25 | 北京无线电计量测试研究所 | Liquid level monitoring method and device suitable for deep well liquid level monitoring |
| CN113188627B (en) * | 2021-05-25 | 2021-11-16 | 中水北方勘测设计研究有限责任公司 | Inspection well water level overflow well automatic monitoring point position selection system and method |
| CN114414005A (en) * | 2021-12-31 | 2022-04-29 | 奥格科技股份有限公司 | Multi-sensing fusion high-precision water level measuring device and method |
| CN115014461A (en) * | 2022-04-25 | 2022-09-06 | 山东产研信息与人工智能融合研究院有限公司 | Liquid level measuring device and method integrating millimeter wave radar and height sensor |
| CN116124248B (en) * | 2023-02-08 | 2024-05-07 | 武汉新烽光电股份有限公司 | Device and method for measuring water level of drainage pipe network |
| CN115950502B (en) * | 2023-03-09 | 2023-05-26 | 江苏太湖云计算信息技术股份有限公司 | Real-time self-correcting pipe network liquid level detection method and detection device |
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