CN207540633U - A kind of liquid level detection device - Google Patents
A kind of liquid level detection device Download PDFInfo
- Publication number
- CN207540633U CN207540633U CN201721420928.0U CN201721420928U CN207540633U CN 207540633 U CN207540633 U CN 207540633U CN 201721420928 U CN201721420928 U CN 201721420928U CN 207540633 U CN207540633 U CN 207540633U
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- China
- Prior art keywords
- liquid level
- detection device
- level detection
- measuring rod
- waveguide filament
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Abstract
The utility model discloses a kind of liquid level detection device, including measuring rod, magnetostriction converter, magnetic float, temperature sensor and circuit board box.The magnetostriction converter is fixedly installed on the side of the measuring rod；The magnetic float can change with liquid level to be slided along the measuring rod；Control circuit board is equipped in the circuit board box；The temperature sensor is installed in the measuring rod, and is connected with the control circuit board.Using the utility model, can modifying factor temperature cause the liquid level variation that liquid density variation is brought, improve the precision of level sensing.
Description
Technical field
The utility model is related to a kind of liquid level detection device more particularly to a kind of liquid level sensors with temperature-compensating.
Background technology
Machine oil is blood of the automobile in operation process, and when the machine oil in engine is excessive, all parts can generate play
Strong agitation phenomenon, which not only adds engine interior power attenuations, increase oil consumption, but also can make to splash the machine of casing wall
Oil increases, and generates and burns row's machine oil failure, influences environment；When machine oil deficiency, engine will appear insufficient lubrication, and abrasion aggravates,
Even cause tile kilning when serious.
Traditional liquid level detection device mainly includes measuring rod, magnetostriction converter, magnetic float and control circuit.Work
When, control circuit generates a current impulse, this current impulse is transmitted in waveguide filament, while generates one along waveguide filament direction
The toroidal magnetic field of advance when this magnetic field and the axial magnetic field in float are met, makes waveguide filament twist, and generates torsional pulses
Wave, this torsional wave are received and converted to voltage pulse by energy converter, by electronic circuit calculate between two pulses when
Between it is poor, measure the position of machine oil liquid level.
And when liquid level occur and do not change during the changed situation of oil temperature, the height that float immerses machine oil can be sent out
Changing, and the permanent magnet in float is to generate torsional wave physical location, the position of permanent magnet with respect to float position again
It is fixed, so variable density caused by oil temperature changes can make the position between magnet and liquid level change, surveys at this time
The machine oil liquid level position obtained is inaccurate.
Utility model content
In order to solve because cause level sensing inaccurate during temperature change the technical issues of, the utility model provides one kind
Liquid level detection device, including measuring rod, magnetostriction converter, magnetic float, temperature sensor and circuit board box.Wherein, it is described
Measuring rod includes protection sleeve, waveguide filament, return conductor and damping element II.
One end of the waveguide filament stretches out the protection sleeve and is connected with the magnetostriction converter；The waveguide filament
The other end is connected with one end of the return conductor；The other end of the return conductor stretches out the protection sleeve；The damping
Element II passes through the connected end of the waveguide filament and the return conductor, and is set in the protection sleeve.
The magnetic float is arranged on the protection sleeve of the measuring rod, and the magnetic float can with liquid level change along
The measuring rod slides；Control circuit board is equipped in the circuit board box；The temperature sensor is installed in the measuring rod,
And it is connected with the control circuit board.
Further, the temperature sensor at least one.
Further, the end of the measuring rod is equipped with seal receptacle, and the seal receptacle is used to that solution to be measured to be avoided to enter survey
Inside gauge rod.
Further, spring is equipped between the waveguide filament and seal receptacle, the spring prevents wave for tightening waveguide filament
Seal wire bending loosely hinders the smooth propagation of echo.
Preferably, the damping element II is made of the rubber material of damping suction wave.
Preferably, the return conductor is copper conductor.
Specifically, the magnetic float includes float and permanent magnet.
Further, the permanent magnet can be cylindrical magnet iron or sphere permanent magnet.
Further, damping element I, and the damping element are equipped between the magnetostriction converter and current impulse
I is fixedly installed on the waveguide filament.
When liquid level detection device described in the utility model works, control circuit controls pulse generating circuit on waveguide filament
Apply current impulse, one can be generated under the influence of current impulse, around waveguide filament perpendicular to the toroidal magnetic field of waveguide filament, institute
Stating toroidal magnetic field will propagate with current impulse on waveguide filament.
When the axial magnetic field that the toroidal magnetic field and permanent magnet generate is met, mutually superimposed spiral shape magnetic will be generated
, the spiral shape magnetic field makes waveguide filament generate instantaneous torsional deformation at permanent magnetism body position, forms elasticity of torsion wave.
The torsional wave is propagated along waveguide filament to both ends, and the torsional wave propagated along end will be damped element II and absorb,
Prevent the reflection interference signal detection due to wave；The torsional wave propagated along incoming road will be absorbed by magnetostrictive transducer, is converted to
The variation of electromotive force.By pulse-scaling circuit record current pulse generating time and the time difference T for sensing electromotive force, can count
Calculate the liquid level of current solution.
Meanwhile the temperature sensor measures the temperature of solution, control circuit obtains temperature by A/D conversion circuits and joins
Number, and shown by display circuit.In control algolithm, the temperature measured is converted into the variation of density, using temperature-compensating
Algorithm, you can the accurate liquid level for obtaining solution.
The control circuit also is able to communicate with PC machine, realizes the real-time detection of solution level.
Implement the utility model, have the advantages that：Testing liquid temperature can be detected by temperature sensor, and
And changed by the liquid level that algorithm modifying factor temperature causes liquid density variation to bring, improve the precision of detection.In addition, control electricity
Road can also communicate with PC machine, realize the liquid level and temperature of real-time continuous monitoring solution, intelligent early-warning.
Description of the drawings
It, below will be right in order to illustrate more clearly of the utility model embodiment or technical solution of the prior art and advantage
Attached drawing required for describing the embodiments or the prior art is briefly described, it should be apparent that, it is attached in being described below
Figure is only some embodiments of the utility model, for those of ordinary skill in the art, is not being made the creative labor
Under the premise of, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram of liquid level sensor；
Fig. 2 is liquid level sensor control system block diagram.
Wherein, attached drawing correspondence markings are in figure：1- current impulses；2- damping elements I；3- magnetostriction converters；4- is protected
Pretective sleeve pipe；5- waveguide filaments；6- floats；7- damping elements II；8- springs；9- seal receptacles；10- copper conductors；11- permanent magnets；12- temperature
Spend sensor.
Specific embodiment
It is new to this practicality below in conjunction with attached drawing to make the purpose of this utility model, technical solution and advantage clearer
Type is described in further detail.Obviously, described embodiment is only the utility model one embodiment rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not before creative work is made
All other embodiments obtained are put, shall fall within the protection scope of the present invention.
" embodiment " referred to herein refer to may be included in special characteristic at least one realization method of the utility model,
Structure or characteristic.In the utility model unless specifically defined or limited otherwise, the terms such as term " connected ", " connection " should
It is interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be mechanical connection,
It can be electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be the phase inside two elements
Company or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be
Concrete meaning of the above-mentioned term in the utility model.
Embodiment one：
As shown in Figure 1, the utility model provides a kind of liquid level detection device, including measuring rod, magnetostriction converter
3rd, magnetic float, temperature sensor 12 and circuit board box.Wherein, the measuring rod includes protection sleeve 4, waveguide filament 5, return conductor
10 and damping element II7.
One end of the waveguide filament 5 stretches out the protection sleeve 4 and is connected with the magnetostriction converter 3；The waveguide
The other end of silk 5 is connected with one end of the return conductor 10；The other end of the return conductor 10 stretches out the protection sleeve
4；The damping element II7 passes through the connected end of the waveguide filament 5 and the return conductor 10, and is set to the protection sleeve
In 4.
The magnetic float is arranged on the protection sleeve 4 of the measuring rod, and the magnetic float can change edge with liquid level
The measuring rod to slide；Control circuit board is equipped in the circuit board box；The temperature sensor 12 is installed on the measurement
In bar, and it is connected with the control circuit board.
Further, the temperature sensor 12 at least one.
Further, the end of the measuring rod is equipped with seal receptacle 9, and the seal receptacle 9 is used to that solution to be measured to be avoided to enter
Inside measuring rod.
Further, spring 8 is equipped between the waveguide filament 5 and seal receptacle 9, the spring 8 is used to tighten waveguide filament 5,
Prevent 5 bending of waveguide filament from loosely hindering the smooth propagation of echo.
Preferably, the damping element II7 is made of the rubber material of damping suction wave.
Preferably, the return conductor 10 is copper conductor.
Specifically, the magnetic float includes float 6 and permanent magnet 11.
Preferably, the permanent magnet 11 is cylindrical magnet iron.
Further, damping element I2, and the damping member are equipped between the magnetostrictive transducer 3 and current impulse
Part I2 is fixedly installed on the waveguide filament 5.
As shown in Fig. 2, when liquid level detection device described in the utility model works, control circuit control pulse generating circuit
Apply current impulse on waveguide filament 5, under the influence of current impulse, 5 surrounding of waveguide filament can generate one perpendicular to waveguide filament
Toroidal magnetic field, the toroidal magnetic field will be propagated with current impulse on waveguide filament.
It, will mutual superimposed generation spiral when the axial magnetic field that the toroidal magnetic field and cylinder permanent magnet 11 generate is met
Shape magnetic field, the spiral shape magnetic field make waveguide filament generate instantaneous torsional deformation at permanent magnetism body position, form elasticity of torsion wave.
The torsional wave is propagated along waveguide filament 5 to both ends, and the torsional wave propagated along end will be damped element II7 and inhale
It receives, prevents the reflection interference signal detection due to wave；The torsional wave propagated along incoming road will be absorbed by magnetostrictive transducer 3, from
And induced voltage exports.It, can by pulse-scaling circuit record current pulse generating time and the time difference T for sensing electromotive force
Calculate the liquid level of current solution.
Meanwhile the temperature sensor 12 measures the temperature of solution, control circuit obtains temperature by A/D conversion circuits and joins
Number, and shown by display circuit.In control algolithm, the temperature measured is converted into the variation of density, using temperature-compensating
Algorithm, you can the accurate liquid level for obtaining solution.
The control circuit also is able to communicate with PC machine, realizes the real-time detection of solution level.
Embodiment two：
As shown in Figure 1, the utility model provides a kind of liquid level detection device, including measuring rod, magnetostriction converter
3rd, magnetic float, temperature sensor 12 and circuit board box.Wherein, the measuring rod includes protection sleeve 4, waveguide filament 5, return conductor
10 and damping element II7.
One end of the waveguide filament 5 stretches out the protection sleeve 4 and is connected with the magnetostriction converter 3；The waveguide
The other end of silk 5 is connected with one end of the return conductor 10；The other end of the return conductor 10 stretches out the protection sleeve
4；The damping element II7 passes through the connected end of the waveguide filament 5 and the return conductor 10, and is set to the protection sleeve
In 4.
The magnetic float is arranged on the protection sleeve 4 of the measuring rod, and the magnetic float can change edge with liquid level
The measuring rod to slide；Control circuit board is equipped in the circuit board box；The temperature sensor 12 is installed on the measurement
In bar, and it is connected with the control circuit board.
Further, the temperature sensor 12 at least one.
Further, the end of the measuring rod is equipped with seal receptacle 9, and the seal receptacle 9 is used to that solution to be measured to be avoided to enter
Inside measuring rod.
Further, spring 8 is equipped between the waveguide filament 5 and seal receptacle 9, the spring 8 is used to tighten waveguide filament 5,
Prevent 5 bending of waveguide filament from loosely hindering the smooth propagation of echo.
Preferably, the damping element II7 is made of the rubber material of damping suction wave.
Preferably, the return conductor 10 is copper conductor.
Specifically, the magnetic float includes float 6 and permanent magnet 11.
Preferably, the permanent magnet 11 is cylindrical magnet iron.
Further, echo detection device is piezoelectric ceramic transducer.
Further, damping element I2 is equipped between the coil 3 and current impulse, and the damping element I2 fixes peace
Loaded on the waveguide filament 5.
As shown in Fig. 2, when liquid level detection device described in the utility model works, control circuit control pulse generating circuit
Apply current impulse on waveguide filament 5, under the influence of current impulse, 5 surrounding of waveguide filament can generate one perpendicular to waveguide filament
Toroidal magnetic field, the toroidal magnetic field will be propagated with current impulse on waveguide filament.
It, will mutual superimposed generation spiral when the axial magnetic field that the toroidal magnetic field and cylinder permanent magnet 11 generate is met
Shape magnetic field, the spiral shape magnetic field make waveguide filament generate instantaneous torsional deformation at permanent magnetism body position, form elasticity of torsion wave.
The torsional wave is propagated along waveguide filament 5 to both ends, and the torsional wave propagated along end will be damped element II7 and inhale
It receives, prevents the reflection interference signal detection due to wave；The torsional wave propagated along incoming road will be absorbed by piezoelectric ceramic transducer, be become
The variation of electromotive force.By pulse-scaling circuit record current pulse generating time and the time difference T for sensing electromotive force, can count
Calculate the liquid level of current solution.
Meanwhile the temperature sensor 12 measures the temperature of solution, control circuit obtains temperature by A/D conversion circuits and joins
Number, and shown by display circuit.In control algolithm, the temperature measured is converted into the variation of density, using temperature-compensating
Algorithm, you can the accurate liquid level for obtaining solution.
The control circuit also is able to communicate with PC machine, realizes the real-time detection of solution level.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
For personnel, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (10)
1. a kind of liquid level detection device, which is characterized in that passed including measuring rod, magnetostriction converter (3), magnetic float, temperature
Sensor (12) and circuit board box；
The magnetostriction converter (3) is fixedly installed on the side of the measuring rod；The magnetic float can change with liquid level
It is slided along the measuring rod；Control circuit board is equipped in the circuit board box；The temperature sensor (12) is installed on described
In measuring rod, and it is connected with the control circuit board.
2. a kind of liquid level detection device according to claim 1, which is characterized in that the measuring rod includes protection sleeve
(4), waveguide filament (5), return conductor (10) and damping element II (7)；
One end of the waveguide filament (5) stretches out the protection sleeve (4) and is connected with the magnetostriction converter (3)；The wave
The other end of seal wire (5) is connected with one end of the return conductor (10)；Described in the other end of the return conductor (10) stretches out
Protect sleeve (4)；The damping element II (7) and sets across the connected end of the waveguide filament (5) and the return conductor (10)
It is placed in the protection sleeve (4).
3. a kind of liquid level detection device according to claim 2, which is characterized in that the end of the measuring rod is equipped with sealing
Seat (9), the seal receptacle (9) is for avoiding solution to be measured from entering inside measuring rod.
4. a kind of liquid level detection device according to claim 3, which is characterized in that the waveguide filament (5) and seal receptacle (9)
Between be equipped with spring (8), the spring (8) is for tightening waveguide filament (5).
5. a kind of liquid level detection device according to claim 2, which is characterized in that the damping element II (7) is by damping
The rubber material for inhaling wave is made.
6. a kind of liquid level detection device according to claim 2, which is characterized in that the return conductor (10) is led for copper
Line.
7. a kind of liquid level detection device according to claim 2, which is characterized in that the magnetic float is arranged on the protection
The outer surface of sleeve (4), including float (6) and permanent magnet (11).
8. a kind of liquid level detection device according to claim 7, which is characterized in that the permanent magnet (11) can be cylinder
Shape permanent magnet or sphere permanent magnet.
9. a kind of liquid level detection device according to claim 2, which is characterized in that the magnetostriction converter (3) with
Damping element I (2) is equipped between current impulse, and the damping element I (2) is fixedly installed on the waveguide filament (5).
10. a kind of liquid level detection device according to claim 1, which is characterized in that the temperature sensor (12) is at least
There are one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721420928.0U CN207540633U (en) | 2017-10-26 | 2017-10-26 | A kind of liquid level detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721420928.0U CN207540633U (en) | 2017-10-26 | 2017-10-26 | A kind of liquid level detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207540633U true CN207540633U (en) | 2018-06-26 |
Family
ID=62611692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721420928.0U Expired - Fee Related CN207540633U (en) | 2017-10-26 | 2017-10-26 | A kind of liquid level detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207540633U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375632A (en) * | 2019-08-23 | 2019-10-25 | 河北工业大学 | A kind of magnetostrictive displacement sensor suitable for big temperature range/hot environment |
| CN115342886A (en) * | 2022-07-20 | 2022-11-15 | 大庆飞海石油科技有限公司 | Magnetostrictive liquid level meter |
-
2017
- 2017-10-26 CN CN201721420928.0U patent/CN207540633U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375632A (en) * | 2019-08-23 | 2019-10-25 | 河北工业大学 | A kind of magnetostrictive displacement sensor suitable for big temperature range/hot environment |
| CN115342886A (en) * | 2022-07-20 | 2022-11-15 | 大庆飞海石油科技有限公司 | Magnetostrictive liquid level meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200611 Address after: 315336 No. two, 818 Binhai New Area, Hangzhou Bay, Zhejiang, Ningbo Co-patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee after: NINGBO GEELY ROYAL ENGINE COMPONENTS Co.,Ltd. Address before: 250101 Chunhui Road, Ji'nan high tech Zone, Ji'nan, Shandong, 1777 Patentee before: JI'NAN GEELY AUTO PARTS Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180626 Termination date: 20211026 |