CN104236677A - Ultralow power consumption magnetic induction type floater water level sensor and signal processing method - Google Patents
Ultralow power consumption magnetic induction type floater water level sensor and signal processing method Download PDFInfo
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- CN104236677A CN104236677A CN201410422869.5A CN201410422869A CN104236677A CN 104236677 A CN104236677 A CN 104236677A CN 201410422869 A CN201410422869 A CN 201410422869A CN 104236677 A CN104236677 A CN 104236677A
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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
- G01F23/30—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 floats
- G01F23/40—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 floats using bands or wires as transmission elements
- G01F23/46—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 floats using bands or wires as transmission elements using magnetically actuated indicating means
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- Level Indicators Using A Float (AREA)
Abstract
The invention discloses an ultralow power consumption magnetic induction type floater water level sensor and a signal processing method. The floater water level sensor comprises an encoder, a driving gear set, a water gauge range wheel, a counterweight, a steel wire rope and a floater, wherein three magnetic induction reed pipes in 120-degree angular difference are mounted on a fixed code tray of the encoder; two signal wires are led from each reed pipe; a magnet is mounted at the top end of a rotating arm of the encoder; when the magnet passes by the reed pipes, the two output signal wires of the reed pipes are enabled to generate low level; a data collector is roused and the logic state of the signal wires is compared, thereby acquiring a level condition. The ultralow power consumption magnetic induction type floater water level sensor can be used for sensing the change in level in real time, converting the change in level into an electric pulse signal and sending to the data collector, so that the data collector cannot miss the important level change process under a dormant state; the power consumption is low and the sensor can run with zero consumption under most states; the ultralow power consumption magnetic induction type floater water level sensor is especially fit for level real-time collection under field zero alternating current supply condition.
Description
Technical field
The present invention relates to a kind of super low-power consumption magnetic inductive float water level sensor and signal processing method, belong to hydrology and water conservancy automatic field.
Background technology
In hydrology and water conservancy automatic field, hydrological telemetering station is used for realizing gathering and remote transmission original hydrographic information, and these hydrographic informations comprise rainfall amount, water level, flow etc.Hydrological telemetering station is generally made up of various sensor, data acquisition unit, telecommunication device, power-supply device.Wherein sensor is responsible for hydrographic information to be converted to electric signal, and data acquisition unit is responsible for gathering these electric signal and be converted into actual physical quantity numerical value, by telecommunication device, these data are sent to data center, undertaken processing, analyzing by data center.
The sensor being applied to level measuring at present can be divided into 2 kinds from the way of output of data:
Pure passsive sensor: this kind of level sensor is measured all needs data acquisition unit initiatively to initiate, self cannot initiatively initiate to measure, sensor is only after receiving the measuring command or power supply excitation that data acquisition unit sends, just can sample, and convert data to electric signal and export to data acquisition unit.The level sensor overwhelming majority applied in hydrological telemetering station at present belongs to passsive sensor.
Active sensor: this kind of sensor self can initiate level measuring, and can by the data active upload of measurement to data acquisition unit; Also can receive the order initiation measurement that data acquisition unit sends, return measurement result is to data acquisition unit.
Hydrological telemetering station is often arranged on remote districts, and on-the-spot substantially without Alternating Current Power Supply condition, equipment generally adopts accumulator and solar cell for supplying power, and for guarantee equipment works the time long as far as possible under environment without sunshine, the operation power consumption of equipment should be low as far as possible.In actual applications, the data acquisition unit at hydrological telemetering station is generally with the sampling of fixed time interval initiation to level sensor, data center is sent to by telepak after collecting data, then just dormant state is entered, to reduce the power consumption of self, until restart work when next sampling instant arrives.If what hydrological telemetering station adopted is passive type level sensor, the working method of so this timing sampling also determines between the double sampling moment, if there is large change in water level, this change process cannot perceived and sample because be in dormant state at this time period data acquisition unit.Such as, but may cause huge disaster when often water level is undergone mutation, Summer Heavy Rainfall can cause flood of a mountain area in the short time to rise suddenly and sharply, and causes mountain flood.If what hydrological telemetering station adopted is active sensor, so sensor is always in running order, and the power consumption of Whole Equipment can be caused again to increase, and at continuous wet weather, under the situation of solar powered deficiency, accumulator can the limited time of fastening continuous firing.Therefore the power consumption how reducing equipment under can catching the prerequisite of SEA LEVEL VARIATION is in real time the difficult problem that field is measured without Alternating Current Power Supply Water Under position always.
At present at the hydrological telemetering website of some keys, in order to catch water level information in real time, the general float-type transmitter adopting photoelectric coding.This sensor adopts the sensor of other measuring principle (mainly containing pressure water-level sensor, indicator water sensor, ultrasonic water level sensor, laser water level sensor) relatively, be the active sensor that unique a kind of inside can not comprise processor, therefore power consumption is also minimum in all active sensors.The float sensor inside of photoelectric coding is adopted to have a set of light shutter device, its measuring principle is that the rising of water level or decline can drive code-disc to rotate, the signal that light shutter device exports can change thereupon, there is a set of electrooptical device that light signal is converted to electric impulse signal simultaneously, the data acquisition unit of rear end can wake up from dormant state by this electric impulse signal, priming level collection.Need to provide external power source during this float type level meter work, light shutter device is always in running order at ordinary times, average power consumption is greatly about about 100mw, for the hydrological telemetering website in field, need to be equipped with jumbo accumulator to guarantee the continuous working period of equipment under continuous overcast and rainy condition.
In the wild without under the condition of Alternating Current Power Supply, for reducing the overall operation power consumption of hydrological telemetering station equipment, the general not full speed running of data acquisition unit, but start sensor collection at a certain time interval, enter dormant state to save power consumption after completing collection and telecommunication task.And most level sensors of hydrological telemetering station application at present all belong to passsive sensor, when data acquisition unit is in dormant state, cannot gather waterlevel data, this likely misses important SEA LEVEL VARIATION process.Although photoelectric coding float type water level sensor comparatively popular at present can measure water level by Active and Real-time, but need full speed running, by lasting transmission light signal perception SEA LEVEL VARIATION, therefore power consumption is bigger than normal, and the accumulator that the hydrological telemetering station being arranged on field needs to configure larger capacity is to guarantee that equipment can the continuous firing long period under continuous overcast and rainy condition.But hydrological telemetering station is often all in the area of transportation condition, and large-capacity battery is inconvenient to transport and carry.
Summary of the invention
The invention provides a kind of super low-power consumption magnetic inductive float water level sensor and signal processing method, SEA LEVEL VARIATION can not only be responded in real time, SEA LEVEL VARIATION is converted to electric impulse signal and sends data acquisition unit to, make collector be unlikely to when dormancy to miss important SEA LEVEL VARIATION process; And this sensor maximum power dissipation at ordinary times only has about 1/40 of photoelectric coding float type water level sensor, and can run with zero-power under most of state.Therefore this sensor is specially adapted to field without the water level Real-time Collection under Alternating Current Power Supply condition.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of super low-power consumption magnetic inductive float water level sensor, comprise scrambler, driving gear set, water level have the records of distance by the log wheel, counterweight, wire rope and float, described scrambler and driving gear set are arranged on the shell of float water level sensor, described wire rope is arranged on water level and has the records of distance by the log on wheel, one end of wire rope is counterweight, and the other end is float;
Described scrambler is made up of a fixing code-disc and a pivot arm, described fixing code-disc is provided with 3 magnetic-inductive dry-reed tubes in 120 degree of differential seat angles, described each magnetic-inductive dry-reed tube draws 2 signal wires, from each magnetic-inductive dry-reed tube, each extraction 1 signal wire, links together as common port;
Described pivot arm and fixing code-disc parallel surface are to installation, and one block of magnet is installed on the top of pivot arm, rotates with pivot arm;
Described driving gear set comprises 2 groups of transmission gears and transmission shaft, and two transmission gears are meshed, wherein 1 transmission shaft and pivot arm coaxial, another 1 transmission shaft and water level have the records of distance by the log wheel coaxial; When water level rises or declines, rope belt dynamic water level wheel of having the records of distance by the log rotates, and water level wheel belt of having the records of distance by the log is moved transmission gear on same transmission shaft and rotated, and this transmission gear can drive again another transmission gear coaxial with pivot arm to rotate, thus driven rotary arm rotates;
Described magnetic-inductive dry-reed tube is connected to the digital signal ground of the data acquisition unit at hydrological telemetering station as the signal wire of common port, and other 3 signal wires are connected on the digital quantity input port of the data acquisition unit at hydrological telemetering station.
The digital quantity input port of aforesaid data acquisition unit uses resistance to be pulled to high level, and these digital quantity input ports support level interrupt.
Aforesaid resistance value is chosen between 10K ~ 100K.
The signal processing method of super low-power consumption magnetic inductive float water level sensor, comprises the following steps:
1) the binary logic state representation of magnetic-inductive dry-reed tube output signal is defined, obtain the binary logic state combination of three magnetic-inductive dry-reed tubes, output signal when magnetic-inductive dry-reed tube adhesive represents with Binary Zero, represents during non-pull state with binary one;
2) define pivot arm to turn clockwise expression water level decreasing, be rotated counterclockwise and represent that water level rises;
3) data acquisition unit at hydrological telemetering station is in dormant state at ordinary times, and when water level rises or decline, the corresponding work of pivot arm is counterclockwise or rotate clockwise, thus band moving magnet rotates together;
4) when magnet is through arbitrary magnetic-inductive dry-reed tube, the reed adhesive of magnetic-inductive dry-reed tube inside can be caused, thus cause 2 of this magnetic-inductive dry-reed tube output signal lines to be in short-circuit condition, output low level;
5) the digital quantity input port that low level signal makes the processor of data acquisition unit corresponding produces an interruption, data acquisition unit is waken up from dormant state;
6) data acquisition unit reads the binary logic state of current 3 magnetic-inductive dry-reed tubes output signal, compare with the logic state of last time, determine that pivot arm is clockwise movement or counterclockwise movement, and then determine that water level is rising resolution unit or declines a resolution unit.
The computing method of aforesaid level sensor resolution are:
Namely the amplitude of the fluctuation of water table that adjacent two water level signal produce is the resolution of this level sensor, suppose to have the records of distance by the log to take turns and often turn around, scrambler pivot arm rotates N circle, and water level is had the records of distance by the log and taken turns girth is L, level sensor resolution is R, then R=L/(N × 3).
The present invention does not need independent power supply, wake data acquisition unit up by water level wheel rotation triggering magnetic-inductive dry-reed tube generation electric impulse signal to carry out work completely, the consumption of electric current is only on a pull-up resistor of back end signal treatment circuit, therefore the present invention is greatly better than the active sensor of photoelectric coding on power consumption levels, be adapted at field without under the condition of Alternating Current Power Supply for level measuring.The measuring principle that the present invention adopts can not only catch SEA LEVEL VARIATION in real time, and greatly reduces the operation power consumption of equipment, enhances the battery durable ability of field without equipment under Alternating Current Power Supply condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of float water level sensor of the present invention;
Fig. 2 is that in sensor of the present invention, scrambler fixes code-disc structure and signal wire schematic diagram;
Fig. 3 is scrambler pivot arm and fixing code-disc position view in sensor of the present invention.
Embodiment
Super low-power consumption magnetic inductive float water level sensor of the present invention as shown in Figure 1, be made up of have the records of distance by the log wheel 2, counterweight 3, wire rope 4 and float 5 of scrambler, driving gear set, water level, wherein, scrambler and driving gear set are arranged on the shell 1 of float water level sensor, wire rope 4 is arranged on water level and has the records of distance by the log on wheel 2, one end of wire rope 4 is counterweight 3, and the other end is float 5.Driving gear set comprises 2 groups of transmission gears and transmission shaft, and two transmission gears are meshed, wherein 1 transmission shaft and pivot arm coaxial, another 1 transmission shaft and water level have the records of distance by the log wheel coaxial; When water level rises or decline, wire rope 4 drives water level wheel 2 of having the records of distance by the log to rotate, and water level wheel 2 of having the records of distance by the log drives the transmission gear on same transmission shaft to rotate, and this transmission gear can drive again another transmission gear coaxial with pivot arm to rotate, thus the rotation of driven rotary arm.
Scrambler is the core component of sensor of the present invention, is made up of a fixing code-disc and a pivot arm,
As shown in Figure 2, fixing code-disc is provided with 3 magnetic-inductive dry-reed tubes in 120 degree of angular differences, each tongue tube draws 2 signal wires, respectively extracts 1 signal wire out from each tongue tube, and link together as common port G, remaining signal wire is designated as A, B, C respectively.When tongue tube is subject to magnetic field gravitation, the reed of tongue tube inside is by magnetic field suction and make 2 signal line short circuits in this tongue tube, and this 2 signal line is in off state at ordinary times.
As shown in Figure 3, pivot arm 9 is the parts that can move in a circle, and fixing code-disc 6 parallel surface is to installation, and pivot arm 9 is driven by the transmission gear coaxial with it, and when tested water-level fluctuation, transmission gear can rotate by driven rotary arm 9.One block of magnet 8 has been installed on the top of pivot arm 9, magnet 8 rotates with pivot arm 9, when magnet 8 is through magnetic-inductive dry-reed tube 7, can cause the reed adhesive of magnetic-inductive dry-reed tube 7 inside, thus cause 2 of this magnetic-inductive dry-reed tube output signal lines to be in short-circuit condition, output low level.
Signal processing method of the present invention is:
First, the binary logic state representation of definition magnetic-inductive dry-reed tube output signal, output signal when tongue tube adhesive represents with Binary Zero, represent with binary one during non-pull state, so the logic state combination binary logic of three tongue tubes represents to there are several states as shown in table 1.
Table 1 tongue tube logic state table
Secondly, definition pivot arm turns clockwise expression water level decreasing, is rotated counterclockwise and represents that water level rises.So just by the front and back state of contrast scrambler tongue tube, can determine that water level rises or declines.The current state such as supposing scrambler is 110, according to Fig. 2 and table 1 can infer, next state if 101, then represents water level decreasing; If 011, then represent that water level rises.
Then read the logic state of signal wire by data acquisition unit, and judge water level conditions.
Similar with the float gauge of photoelectric coding, what float water level sensor of the present invention obtained scrambler output is also increment signal, and therefore the data acquisition unit at hydrological telemetering station needs to design corresponding signal processing circuit and the normal use of program ability.As shown in Figure 2, level sensor draws 4 signal wires altogether, wherein A, B, C should be connected on the digital quantity input port of data acquisition unit, and these ports should use resistance (resistance value is chosen between 10K ~ 100K) to be pulled to high level, and these digital quantity input ports need to support level interrupt function, and common port is connected to the digital signal ground of data acquisition unit.
The data acquisition unit at hydrological telemetering station is in dormant state at ordinary times, when water level rises or decline, the coaxial transmission gear of pivot arm drives pivot arm do counterclockwise or rotate clockwise, pivot arm band moving magnet rotates together, when magnet is through arbitrary magnetic-inductive dry-reed tube, the reed adhesive in magnetic-inductive dry-reed tube can be caused, thus make output low level on corresponding signal wire, the digital quantity input port that this low level signal makes the processor of data acquisition unit corresponding produces an interruption, data acquisition unit is waken up from dormant state.Data acquisition unit reads the binary logic state of current 3 magnetic-inductive dry-reed tubes output signal, compare with the logic state of last time, determine that pivot arm is clockwise movement or counterclockwise movement, and then water level is rising resolution unit or declines a resolution unit.
Wherein, the computing method of level sensor resolution are,
Namely the amplitude of the fluctuation of water table that adjacent two water level signal produce is the resolution of this level sensor, and supposing has the records of distance by the log to take turns often turns around, and scrambler pivot arm rotates N circle, and water level is had the records of distance by the log and taken turns girth is L, and level sensor resolution is R, then
R?=?L?/?(N?×3)
Such as, water level is had the records of distance by the log and taken turns girth is 48cm, N=16, then water level resolution is 1cm.
The present invention's 3 signal wires be connected on data acquisition unit digital quantity input port all need to adopt at least 10K but the resistance being not more than 100K is pulled to high level, when water-level gauge signal wire output logic state is for kind of the situation of the 4th shown in table 1, input impedance due to port is generally M Europe level, and the electric current therefore consumed is almost negligible.And when water-level gauge signal wire output logic state is for other several situation shown in table 1, a certain signal wire is only had to export as low level, the electric current of about hundreds of μ A can be produced on pull-up resistor, by processor supply voltage be 5V, pull-up resistor be 10K calculate, power consumption is also only 2.5mW.
Claims (5)
1. a super low-power consumption magnetic inductive float water level sensor, it is characterized in that, comprise scrambler, driving gear set, water level have the records of distance by the log wheel, counterweight, wire rope and float, described scrambler and driving gear set are arranged on the shell of float water level sensor, described wire rope is arranged on water level and has the records of distance by the log on wheel, one end of wire rope is counterweight, and the other end is float;
Described scrambler is made up of a fixing code-disc and a pivot arm, described fixing code-disc is provided with 3 magnetic-inductive dry-reed tubes in 120 degree of differential seat angles, described each magnetic-inductive dry-reed tube draws 2 signal wires, from each magnetic-inductive dry-reed tube, each extraction 1 signal wire, links together as common port;
Described pivot arm and fixing code-disc parallel surface are to installation, and one block of magnet is installed on the top of pivot arm, rotates with pivot arm;
Described driving gear set comprises 2 groups of transmission gears and transmission shaft, and two transmission gears are meshed, wherein 1 transmission shaft and pivot arm coaxial, another 1 transmission shaft and water level have the records of distance by the log wheel coaxial; When water level rises or declines, rope belt dynamic water level wheel of having the records of distance by the log rotates, and water level wheel belt of having the records of distance by the log is moved transmission gear on same transmission shaft and rotated, and this transmission gear can drive again another transmission gear coaxial with pivot arm to rotate, thus driven rotary arm rotates;
Described magnetic-inductive dry-reed tube is connected to the digital signal ground of the data acquisition unit at hydrological telemetering station as the signal wire of common port, and other 3 signal wires are connected on the digital quantity input port of the data acquisition unit at hydrological telemetering station.
2. a kind of super low-power consumption magnetic inductive float water level sensor according to claim 1, is characterized in that, the digital quantity input port of described data acquisition unit uses resistance to be pulled to high level, and described digital quantity input port supports level interrupt.
3. a kind of super low-power consumption magnetic inductive float water level sensor according to claim 2, it is characterized in that, described resistance value is chosen between 10K ~ 100K.
4., according to the signal processing method of the super low-power consumption magnetic inductive float water level sensor in claim 1 or 3 described in any one, it is characterized in that, comprise the following steps:
1) the binary logic state representation of magnetic-inductive dry-reed tube output signal is defined, obtain the binary logic state combination of three magnetic-inductive dry-reed tubes, output signal when magnetic-inductive dry-reed tube adhesive represents with Binary Zero, represents during non-pull state with binary one;
2) define pivot arm to turn clockwise expression water level decreasing, be rotated counterclockwise and represent that water level rises;
3) data acquisition unit at hydrological telemetering station is in dormant state at ordinary times, and when water level rises or decline, the corresponding work of pivot arm is counterclockwise or rotate clockwise, thus band moving magnet rotates together;
4) when magnet is through arbitrary magnetic-inductive dry-reed tube, the reed adhesive of magnetic-inductive dry-reed tube inside can be caused, thus cause 2 of this magnetic-inductive dry-reed tube output signal lines to be in short-circuit condition, output low level;
5) the digital quantity input port that low level signal makes the processor of data acquisition unit corresponding produces an interruption, data acquisition unit is waken up from dormant state;
6) data acquisition unit reads the binary logic state of current 3 magnetic-inductive dry-reed tubes output signal, compare with the logic state of last time, determine that pivot arm is clockwise movement or counterclockwise movement, and then determine that water level is rising resolution unit or declines a resolution unit.
5. signal processing method according to claim 4, is characterized in that, the computing method of described level sensor resolution are:
Namely the amplitude of the fluctuation of water table that adjacent two water level signal produce is the resolution of this level sensor, suppose to have the records of distance by the log to take turns and often turn around, scrambler pivot arm rotates N circle, and water level is had the records of distance by the log and taken turns girth is L, level sensor resolution is R, then R=L/(N × 3).
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| CN201410422869.5A CN104236677A (en) | 2014-08-25 | 2014-08-25 | Ultralow power consumption magnetic induction type floater water level sensor and signal processing method |
| PCT/CN2015/087994 WO2016029837A1 (en) | 2014-08-25 | 2015-08-25 | Ultra-low power consumption magnetic induction type floater water level sensor and signal processing method |
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| CN107917660A (en) * | 2017-11-17 | 2018-04-17 | 青岛澳邦量器有限责任公司 | A kind of measuring apparatus |
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| CN113108871A (en) * | 2021-04-14 | 2021-07-13 | 中国建筑第八工程局有限公司 | Automatic water level monitoring system and monitoring method thereof |
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| CN104732729A (en) * | 2015-04-10 | 2015-06-24 | 厦门理工学院 | Energy-saving type flood early warning method and device for garage |
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| CN108093379A (en) * | 2018-02-01 | 2018-05-29 | 深圳市泰比特科技有限公司 | A kind of train door monitor terminal and its system based on LoRa |
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| CN109631858A (en) * | 2019-02-22 | 2019-04-16 | 中国人民解放军海军大连舰艇学院 | A kind of portable float-type automatic tide gauge |
| CN113108871A (en) * | 2021-04-14 | 2021-07-13 | 中国建筑第八工程局有限公司 | Automatic water level monitoring system and monitoring method thereof |
| CN113624300A (en) * | 2021-07-21 | 2021-11-09 | 中航勘察设计研究院有限公司 | Water level measuring device and measuring method for observation well |
| CN113624300B (en) * | 2021-07-21 | 2023-10-20 | 中航勘察设计研究院有限公司 | Water level measuring device and measuring method for observation well |
| CN117091673A (en) * | 2023-10-17 | 2023-11-21 | 江苏多维科技有限公司 | Counter weight type liquid level measurement system |
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| WO2016029837A1 (en) | 2016-03-03 |
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