CN207688975U - A kind of magnetostriction liquidometer - Google Patents
A kind of magnetostriction liquidometer Download PDFInfo
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- CN207688975U CN207688975U CN201820048235.1U CN201820048235U CN207688975U CN 207688975 U CN207688975 U CN 207688975U CN 201820048235 U CN201820048235 U CN 201820048235U CN 207688975 U CN207688975 U CN 207688975U
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- magnetostriction
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Abstract
The utility model embodiment provides a kind of magnetostriction liquidometer, and the magnetostriction liquidometer includes：Detect bar, measuring device, float, transmitter device, thermocouple, signal cable, pressure transmitter and computing device；Wherein, the measuring device is mounted on pressure vessel side, and the detection bar is inserted into the measuring device, and the float is equipped on the detection bar, and the transmitter device is connected with one end of the detection bar；The installation of TC is in the lower part of the pressure vessel；The pressure transmitter is connected by pressure pipeline with the pressure vessel；The computing device is connected with the pressure transmitter, the thermocouple and the transmitter device respectively by the signal cable, it can be for measurement error compensates calculating caused by fluid to be measured density with temperature changes in measurement process, measurement error can be avoided, has many advantages, such as precision height, high sensitivity.
Description
【Technical field】
The utility model is related to tank fill level field of measuring technique more particularly to a kind of magnetostriction liquidometers.
【Background technology】
In enterprise's production now, magnetostriction liquidometer is widely used in power plant boiler drum, oxygen-eliminating device, height
Press the level gauging of heater, low-pressure heater and condenser.When measurement, the circuit unit of magnetostriction liquidometer generates electric current
Pulse, which transmits downwards along the magnetostriction line in detection bar, and generates an annular magnetic field.Match outside detection bar
There are float, float to be moved up and down with the variation of liquid level in container along detection bar.Since the magnetic line of force being equipped in float can be simultaneously
A magnetic field is generated, when current field meets with float magnetic field, " return " pulse is generated, by " return " pulse and current impulse
Time difference be converted into pulse signal, to calculate the physical location of float, measure liquid level.
Inventor has found that in the actual production process, the temperature of container is constantly changing in the implementation of the present invention,
The density of liquid also can constantly change with the variation of temperature in container, i.e. liquid level of the liquid in container can change,
But since the magnetic line of force height of float is fixed, change at a distance from liquid level so as to cause the magnetic line of force height of float,
And then generate the error of level measurement and liquid level actual value.
【Utility model content】
In view of this, the utility model embodiment provides a kind of magnetostriction liquidometer, to solve in the prior art
There is error with liquid level actual value in level measurement.
The utility model embodiment the first aspect provides a kind of magnetostriction liquidometer, including：It detects bar, measure dress
It sets, float, transmitter device, thermocouple, signal cable, pressure transmitter and computing device；Wherein, the measuring device installation
In pressure vessel side, the detection bar is inserted into the measuring device, and the float, the change are equipped on the detection bar
Device device and one end of the detection bar is sent to be connected, the transmitter device, the detection bar and the float are for measuring institute
State the fluid temperature in liquid level and the measuring device in pressure vessel；The installation of TC is in the pressure vessel
Lower part, for measuring the fluid temperature in the pressure vessel；The pressure transmitter is held by pressure pipeline and the pressure
Device is connected, the pressure for measuring the pressure vessel；The computing device by the signal cable respectively with the pressure
Transmitter, the thermocouple are connected with the transmitter device, for according to the pressure of the collected pressure vessel, described
The fluid temperature in fluid temperature and the measuring device in pressure vessel carries out the liquid level in the pressure vessel
Temperature-compensating calculates.
Further, magnetostriction transmitter and temperature transmitter, the detection bar are provided in the transmitter device
It is embedded in magnetostriction line and thermocouple wire, one end of the magnetostriction line is connected with the magnetostriction transmitter, institute
Thermocouple wire is stated with the temperature transmitter to be connected.
Further, the magnetostriction transmitter is provided with piezoelectric transducer, one end of the magnetostriction line and institute
The piezoelectric transducer stated in magnetostriction transmitter is connected.
Further, the magnetostriction transmitter is provided with timing circuit.
Further, the float is embedded with the magnetic line of force.
Further, the shape of the float is cylinder.
The utility model embodiment the second aspect provides a kind of method measuring pressure vessel liquid level, is applied to
Magnetostriction liquidometer, including：Record generates the first time information of current impulse and receives the second time for returning to pulse
Information；The measurement liquid level of liquid in pressure vessel is determined according to the first time information and second temporal information；It measures
In the pressure parameter of the pressure vessel, the pressure vessel in the first temperature parameter of liquid and measuring device liquid second
Temperature parameter；Based on preset model of temperature compensation, according to the pressure parameter, first temperature parameter and second temperature
The measurement liquid level for spending parameter and the liquid, determines the actual liquid level of liquid in the pressure vessel.
Further, described to be based on preset model of temperature compensation, according to the pressure parameter, first temperature parameter
With the measurement liquid level of the second temperature parameter and the liquid, determine that the liquid actual liquid level in the pressure vessel includes：
It obtains under the pressure parameter, the first density and described of liquid in the corresponding pressure vessel of first temperature parameter
Second density of liquid in the corresponding measuring device of two temperature parameters；By first density, second density and institute
The measurement liquid level for stating liquid is input in the preset temperature supplementary model, and the reality of liquid in the pressure vessel is calculated
Border liquid level.
Further, the preset temperature supplementary model includes：Wherein, h tables
Show the actual liquid level of the liquid in the pressure vessel, ρ1The first density of liquid in the pressure vessel is indicated, described in ρ is indicated
Second density of liquid in measuring device, L indicate that the measurement liquid level of liquid in the pressure vessel, H indicate that float embeds magnetic force
The height of line, m indicate that float quality, r indicate float radius.
Further, the method further includes：Liquid actual liquid level in the pressure vessel is converted into liquid level telecommunications
Number and export.
Compared with existing conventional magnetostriction liquidometer, magnetostriction liquidometer that the utility model embodiment provides and
The method for measuring pressure vessel liquid level based on the magnetostriction liquidometer can be directed in measurement process due to test solution
Volume density vary with temperature caused by measurement error compensate calculating, measurement error can be avoided, have precision high, sensitive
Spend the advantages that high.
【Description of the drawings】
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the utility model, right
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the magnetostriction liquidometer structural schematic diagram that the utility model embodiment is provided；
Fig. 2 is the method flow diagram for the measurement pressure vessel liquid level that the utility model embodiment is provided.
【Specific implementation mode】
In order to be better understood from the technical solution of the utility model, the utility model embodiment is carried out below in conjunction with the accompanying drawings
Detailed description.
It will be appreciated that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The all other embodiment obtained, shall fall within the protection scope of the present invention.
The term used in the utility model embodiment is the purpose only merely for description specific embodiment, and is not intended to
Limit the utility model.The utility model embodiment and the "an" of singulative used in the attached claims,
" described " and "the" are also intended to including most forms, unless context clearly shows that other meanings.
Embodiment one
As shown in Fig. 1, the utility model embodiment provides a kind of magnetostriction liquidometer, including：It detects bar 10, measure
Device 20, float 30, transmitter device 40, thermocouple 50, signal cable 60, pressure transmitter 70 and computing device 80.
Wherein, measuring device 20 is mounted on the side of pressure vessel, detects in 10 insertion measuring device 20 of bar, detects bar
Float 30 is installed, the density of float 30 is less than the density of liquid in the pressure vessel, described so as to float on 10
Liquid surface, float 30 can be moved up and down along detection bar 10 with the variation of liquid level；Transmitter device 40 and the detection bar
10 one end is connected, by transmitter device 40, detection bar 10 and float 30 come measure in the pressure vessel liquid level and
Fluid temperature in measuring device 20；Thermocouple 50 is mounted on the lower part of the pressure vessel, for measuring the pressure vessel
Interior fluid temperature；Pressure transmitter 70 is connected by pressure pipeline with the pressure vessel, for measuring the pressure vessel
Pressure；Computing device 80 is connected with pressure transmitter 70, thermocouple 50 and transmitter device 40 respectively by signal cable 60,
For according to the liquid in the fluid temperature and measuring device 20 in the pressure of the collected pressure vessel, the pressure vessel
Temperature carries out temperature-compensating calculating to the liquid level in the pressure vessel.
Specifically, it is provided with magnetostriction transmitter and temperature transmitter in transmitter device 40, further, detects bar
10 have been embedded in magnetostriction line and thermocouple wire, and one end of the magnetostriction line is connected with the magnetostriction transmitter,
The other end is extended downwardly along detection bar 10, and the thermocouple wire is connected with the temperature transmitter.The thermocouple wire is for surveying
Fluid temperature in measuring device 20 is converted to temperature telecommunications by the fluid temperature in measuring device 20, the temperature transmitter
Number and exported, to show the temperature of liquid on externally connected with display screen.Optionally, the current range of the temperature signal
In 4-20mA.
Specifically, the shape of float 30 can be cylinder, and float 30 is embedded with the magnetic line of force, and the magnetic line of force generates first
Magnetic field.The magnetostriction transmitter passes through the timing in the magnetostriction transmitter for sending out current pulse signal
Circuit, which records, sends out first time of the current pulse signal, the current pulse signal along with the magnetostriction pick-up
The connected magnetostriction line of device is propagated downwards, generates the second magnetic field moved downward in the process.First magnetic field and institute
When stating the second magnetic field and meeting, two magnetic field interactions make the magnetic field around float 30 change, and magnetostriction line is based on magnetic
The change of field generates torsional stress wave in the position where float 30, and the torsional stress wave is with where known speed from float 30
Position transmitted to upper and lower ends along magnetostriction line, until the magnetostriction transmitter collects the torsional stress wave,
And converting the torsional stress wave to return pulse, the timing circuit record receives second time for returning to pulse.
Optionally, the magnetostriction transmitter is provided with piezoelectric transducer, one end of the magnetostriction line with it is described
The piezoelectric transducer in magnetostriction transmitter is connected.The piezoelectric transducer can be used for acquiring the torsional stress wave,
And convert the torsional stress wave to return pulse.
The time difference of second time and the first time, the as described torsional stress wave are propagated from float position
To the pressure vessel top required time, and since (torsional stress wave is in waveguide material known to the spread speed of torsional stress wave
Spread speed be about 2830m/s), you can the liquid level in the position of float, that is, the pressure vessel is calculated.
However, due in measurement process liquid level can change with the variation of the temperature in pressure vessel, in float
Magnetic line of force height be changeless again, change, need at a distance from liquid level so as to cause the magnetic line of force height of float
Temperature-compensating is carried out to the liquid level of calculating arrived.
Specifically, computing device 80 receives the pressure of the pressure vessel, in measuring device 20 by signal cable 60
Fluid temperature and the pressure vessel in fluid temperature, and by predetermined temperature compensation model to the liquid liquid
Position carries out temperature-compensating.
First, by the corresponding density inquiry table of liquid in the pressure vessel, the pressure in the pressure vessel is determined
Under power, fluid density ρ in the pressure vessel1With fluid density ρ in measuring device 20；Recycle the preset temperature-compensating
ModelTemperature-compensating is carried out to the liquid level, obtains liquid in the pressure vessel
Actual liquid level.Wherein, h indicates the actual liquid level of the liquid in the pressure vessel, ρ1Indicate liquid in the pressure vessel
The first density, ρ indicates that the second density of liquid in measuring device 20, L indicate that liquid level in the pressure vessel, H indicate
Float embeds the height of the magnetic line of force, and m indicates that float quality, r indicate float radius.
Optionally, the magnetostriction transmitter temperatures transmitter in the transmitter device 40 is by liquid in the pressure vessel
The actual liquid level of body is converted to leve signal and is exported, to show liquid in the pressure vessel on externally connected with display screen
The liquid level information of body.Optionally, the current range of the leve signal is in 4-20mA.
The utility model embodiment provides a kind of magnetostriction liquidometer, including：Detect bar, measuring device, float, change
Send device device, thermocouple, signal cable, pressure transmitter and computing device；Wherein, the measuring device is mounted on pressure vessel
Side, the detection bar are inserted into the measuring device, are equipped with the float on the detection bar, the transmitter device and
One end of the detection bar is connected；The installation of TC is in the lower part of the pressure vessel；The pressure transmitter is by taking
Pressure pipe road is connected with the pressure vessel；The computing device by the signal cable respectively with the pressure transmitter, institute
Thermocouple is stated with the transmitter device to be connected.Compared with existing conventional magnetostriction liquidometer, the utility model embodiment
The magnetostriction liquidometer of offer can be for the measurement caused by fluid to be measured density with temperature variation in measurement process
Error compensates calculating, can avoid measurement error, has many advantages, such as precision height, high sensitivity.
Embodiment two
Fig. 2 is the method flow diagram for the measurement pressure vessel liquid level that the utility model embodiment two provides, the side
Method is applied in the magnetostriction liquidometer that embodiment one provides.As shown in Fig. 2, the measurement that the utility model embodiment two provides
The method of pressure vessel liquid level, specifically includes：
S201, record generate the first time information of current impulse and receive the second temporal information for returning to pulse.
Specifically, the magnetostriction transmitter in magnetostriction liquidometer sends out current pulse signal, and passes through the magnetic
The timing circuit record in flexible transmitter is caused to send out the first time information of the current pulse signal, the current impulse letter
It number is propagated downwards along the magnetostriction line being connected with the magnetostriction transmitter, generates moved downward in the process
Two magnetic fields.When first magnetic field is met with second magnetic field, two magnetic field interactions make to float in magnetostriction liquidometer
Magnetic field around sub changes, and magnetostriction line generates torsional stress based on the change in magnetic field in the position where the float
Wave, the torsional stress wave are transmitted along magnetostriction line to upper and lower ends with the position where known speed from the float,
Until the magnetostriction transmitter collects the torsional stress wave, and convert the torsional stress wave to return pulse, it is described
Timing circuit record receives second temporal information for returning to pulse.
S202 determines the measurement liquid of liquid in pressure vessel according to the first time information and second temporal information
Position.
In this step, the time difference of second temporal information and the first time information, the as described torsion are calculated
Stress wave travels to the pressure vessel top required time from the float position, and due to the propagation of torsional stress wave speed
(spread speed of the torsional stress wave in waveguide material is about 2830m/s) known to degree, you can the position of the float is calculated
Set, that is, in the pressure vessel liquid measurement liquid level.
S203 measures the pressure parameter of the pressure vessel, the first temperature parameter of liquid and survey in the pressure vessel
Measure the second temperature parameter of liquid in device.
Specifically, the first temperature of liquid is joined in pressure vessel described in the thermocouple measurement in the magnetostriction liquidometer
It counts, the pressure of pressure vessel, is embedded in the magnetostriction described in the pressure transmitter measurement in the magnetostriction liquidometer
The thermocouple wire in detection bar in liquid level gauge measures the second temperature of liquid in measuring device in the magnetostriction liquidometer
Parameter.
S204 is based on preset model of temperature compensation, according to the pressure parameter, first temperature parameter and described the
The measurement liquid level of two temperature parameters and the liquid, determines the actual liquid level of liquid in the pressure vessel.
Specifically, the corresponding density meter of the liquid under the pressure parameter is obtained, in the density meter described in inquiry
First density of liquid and the corresponding survey of the second temperature parameter in the corresponding pressure vessel of first temperature parameter
Measure the second density of liquid in device；The measurement liquid level of first density, second density and the liquid is input to
In the preset temperature supplementary model, optionally, the preset temperature supplementary model includes：Wherein, h indicates the actual liquid level of the liquid in the pressure vessel, ρ1Indicate the pressure
First density of liquid in force container, ρ indicate that the second density of liquid in the measuring device, L indicate in the pressure vessel
The measurement liquid level of liquid, H indicate that float embeds the height of the magnetic line of force, and m indicates that float quality, r indicate float radius, be calculated
The actual liquid level of liquid in the pressure vessel.
Optionally, the method further includes：Liquid actual liquid level in the pressure vessel is converted into leve signal
And it exports.Transmitter device in the magnetostriction liquidometer can convert the actual liquid level of liquid in the pressure vessel
It for leve signal and is exported, to show the liquid level information of liquid in the pressure vessel on externally connected with display screen；
Fluid temperature in the measuring device can be converted to temperature signal and exported, to be shown on externally connected with display screen
Show the temperature of liquid.
The utility model embodiment provides a kind of method measuring pressure vessel liquid level, including：Record generates electricity
It flows the first time information of pulse and receives the second temporal information for returning to pulse；According to the first time information and described
Second temporal information determines the measurement liquid level of liquid in pressure vessel；Measure the pressure parameter of the pressure vessel, the pressure
In container in the first temperature parameter of liquid and measuring device liquid second temperature parameter；Based on preset temperature-compensating mould
Type, according to the measurement liquid level of the pressure parameter, first temperature parameter and the second temperature parameter and the liquid, really
The actual liquid level of liquid in the fixed pressure vessel.The utility model embodiment provide method can be directed to measurement process in by
Calculating is compensated in measurement error caused by fluid to be measured density with temperature variation, measurement error can be avoided, there is essence
The advantages that degree height, high sensitivity.
Finally it should be noted that：Above example is only to illustrate the technical solution of the embodiment of the present application, rather than limits it
System；Although the application is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its
Still can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equal
It replaces；And these modifications or replacements, each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution
Spirit and scope.The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, it is all
Within the spirit and principles of the utility model, it is new to should be included in this practicality for any modification, equivalent substitution, improvement and etc. done
Within the scope of type protection.
Claims (6)
1. a kind of magnetostriction liquidometer, which is characterized in that including：
Detect bar, measuring device, float, transmitter device, thermocouple, signal cable, pressure transmitter and computing device；
Wherein, the measuring device is mounted on pressure vessel side, and the detection bar is inserted into the measuring device, the detection
The float is installed, the transmitter device is connected with one end of the detection bar, the transmitter device, the spy on bar
Measuring staff and the float are used to measure the fluid temperature in the pressure vessel in liquid level and the measuring device；
The installation of TC is in the lower part of the pressure vessel, for measuring the fluid temperature in the pressure vessel；
The pressure transmitter is connected by pressure pipeline with the pressure vessel, the pressure for measuring the pressure vessel；
The computing device is filled with the pressure transmitter, the thermocouple and the transmitter respectively by the signal cable
Set it is connected, for according in the pressure of the collected pressure vessel, the pressure vessel fluid temperature and the measurement
Fluid temperature in device carries out temperature-compensating calculating to the liquid level in the pressure vessel.
2. magnetostriction liquidometer according to claim 1, which is characterized in that be provided with mangneto in the transmitter device
Flexible transmitter and temperature transmitter, the detection bar have been embedded in magnetostriction line and thermocouple wire, the magnetostriction line
One end be connected with the magnetostriction transmitter, the thermocouple wire is connected with the temperature transmitter.
3. magnetostriction liquidometer according to claim 2, which is characterized in that the magnetostriction transmitter is provided with pressure
Electric transducer, one end of the magnetostriction line are connected with the piezoelectric transducer in the magnetostriction transmitter.
4. magnetostriction liquidometer according to claim 2, which is characterized in that the magnetostriction transmitter is provided with meter
When circuit.
5. according to claim 1-4 any one of them magnetostriction liquidometers, which is characterized in that the float is embedded with magnetic force
Line.
6. according to claim 1-4 any one of them magnetostriction liquidometers, it is characterised in that：The shape of the float is circle
Cylindricality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820048235.1U CN207688975U (en) | 2018-01-10 | 2018-01-10 | A kind of magnetostriction liquidometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820048235.1U CN207688975U (en) | 2018-01-10 | 2018-01-10 | A kind of magnetostriction liquidometer |
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| Publication Number | Publication Date |
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| CN207688975U true CN207688975U (en) | 2018-08-03 |
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| CN201820048235.1U Active CN207688975U (en) | 2018-01-10 | 2018-01-10 | A kind of magnetostriction liquidometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764927A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | Float-type intelligence solution deep measuring device and measuring method |
| CN110160608A (en) * | 2019-06-11 | 2019-08-23 | 北京妙思特仪表有限公司 | A kind of magnetostriction liquidometer that signal waveform is shown |
-
2018
- 2018-01-10 CN CN201820048235.1U patent/CN207688975U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764927A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | Float-type intelligence solution deep measuring device and measuring method |
| CN109764927B (en) * | 2019-03-14 | 2023-12-19 | 长沙学院 | Float type intelligent solution depth measuring device and measuring method |
| CN110160608A (en) * | 2019-06-11 | 2019-08-23 | 北京妙思特仪表有限公司 | A kind of magnetostriction liquidometer that signal waveform is shown |
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