CN102445254A - Device for measuring liquid level in tracking mode - Google Patents
Device for measuring liquid level in tracking mode Download PDFInfo
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- CN102445254A CN102445254A CN2011104275230A CN201110427523A CN102445254A CN 102445254 A CN102445254 A CN 102445254A CN 2011104275230 A CN2011104275230 A CN 2011104275230A CN 201110427523 A CN201110427523 A CN 201110427523A CN 102445254 A CN102445254 A CN 102445254A
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Abstract
The invention discloses a device for measuring the liquid level in a tracking mode, which comprises a magnetic floater, a traction cable, a traction device, a guide rod, a tracking sensor and a control metering device, wherein the center of the magnetic floater is sheathed on the guide rod in a penetrated mode; a small magnetic needle is installed in the magnetic floater; the guide rod is hollow; the tracking sensor is arranged in the guide rod and is a magnetic induction sensor; the tracking sensor is connected with the traction device via the traction cable; the traction cable is provided with a displacement sensor; and the tracking sensor, the traction device and the displacement sensor are respectively electrically connected with the control metering device. The tracking sensor can be driven via the traction cable to move up and down to track and probe the position of the magnetic floater so as to detect the position of the liquid level. The purpose of measuring the liquid level is realized with the method. The device is simple to manufacture, has the advantages of high measurement precision and wide application range, and can continuously measure the liquid level.
Description
Technical field
The present invention relates to a kind of liquid level emasuring device, particularly a kind of tracking mode is surveyed the device of liquid level.
Background technology
The thing position comprises liquid level and solid material level two big classes.And level gauging comprises the switching value measurement and the continuous liquid level measuring dual mode of liquid level position.The switching value measurement of liquid level position is that the liquid level of several fixed positions is measured, and is used for the upper and lower limit warning of liquid level etc.Level gauging is that liquid level is measured continuously continuously, and it is widely used in numerous areas such as oil, chemical industry, food processing.
At present, continuous liquid level measuring method mainly contains kind of level measuring method surplus magnetostriction method, nuclear radiation method, Fiber Optical Sensor Based and the radar method etc. 20.In " kind of level measuring method analysis surplus in the of 20 " literary composition, the continuous level measuring method of kind, principle, characteristics etc. surplus 20 have been carried out detailed comparative analysis.Such as the supercritical ultrasonics technology of mentioning in the literary composition is to utilize transducer, converts pulse of electrical power into ultrasound wave, and the directive liquid level converts this ultrasound wave into electric signal by transducer again after the liquid level reflection.Ultrasound wave is a mechanical wave, and propagation attenuation is little, and the boundary reflection signal is strong, and it is simple to transmit and receive circuit, thereby uses comparatively extensive; But hyperacoustic velocity of propagation receives factor affecting such as density of medium, concentration, temperature, pressure, and its measuring accuracy is lower.And for example microwave method is that microwave passes through antenna (mostly for aperture antenna, flat plane antenna is also arranged) and radiate, and is received by antenna through liquid level reflection back, is transmitted by secondary circuit calculating then and mistiming of receiving signal calculates liquid level.Microwave speed receives the influence of propagation medium, temperature, pressure, liquid dielectric very little, but the specific inductive capacity of the foam of the fluctuation of liquid surface, liquid surface, liquid medium has very big influence to microwave reflection signal power.
Servo-type level meter also is widely used in the pinpoint accuracy of tank level always and measures, and it is based on the principle of buoyant equilibrium, drives the less float of volume by little servomotor, can accurately measure parameters such as liquid level.Float is suspended in the meter case with measuring steel wire, and measuring steel wire is wrapped on the outer wheel hub that Precision Machining crosses; External magnet is fixed in the outer wheel hub, and is coupled with the internal magnet that is fixed on interior wheel hub.When liquid level gauge was worked, the gravity that float acts on the finer wire produced moment on the magnet of wheel hub outside, thereby causes the variation of magnetic flux.When the measured medium liquid level change, make float buoyancy change.Consequently magnetic coupling moment is changed, and the feasible output voltage that has the Hall element of temperature compensation changes.Servomotor rotates, and the adjustment float moves up and down and reaches equilibrium point again.
In addition, the method for pressure conversion liquid level is measured in the employing that the continuous liquid level measuring of petrochemical industry has, and this method exists measurement result to be subject to the influence of liquid density variation influence and sensor long term drift, is difficult to realize high-acruracy survey.
Along with the development of microelectric technique, computer hardware technology, computer software technology, also there are some new continuous level measuring method patents of invention to announce, but mostly have the deficiency of aspects such as manufacturing is complicated, measuring accuracy is low.
Summary of the invention
The object of the present invention is to provide a kind of device simple, that measuring accuracy is high, the tracking mode of applied range is surveyed liquid level of making.
The objective of the invention is to realize through following technical scheme:
Tracking mode of the present invention is surveyed the device of liquid level, comprises magnetic float, pull-in cable, draw-gear, guide pole, tracking transducer, control WT-MSR;
Said magnetic float center is penetrating to be enclosed within on the said guide pole, and the inside of said magnetic float is equipped with small magnetic needle;
Said guide pole boring, said tracking transducer is located at the inside of said guide pole, and said tracking transducer is a magnetic induction sensor;
Said tracking transducer is connected with draw-gear through pull-in cable, and said pull-in cable is provided with displacement transducer;
Said tracking transducer, draw-gear and displacement transducer are electrically connected with said control WT-MSR respectively.
Technical scheme by the invention described above provides can find out that tracking mode provided by the invention is surveyed the device of liquid level, owing to comprise magnetic float, pull-in cable, draw-gear, guide pole, tracking transducer, control WT-MSR; Magnetic float center is penetrating to be enclosed within on the guide pole, and the inside of magnetic float is equipped with small magnetic needle; Guide pole boring, tracking transducer are located at the inside of guide pole, and tracking transducer is a magnetic induction sensor; Tracking transducer is connected with draw-gear through pull-in cable, and pull-in cable is provided with displacement transducer; Tracking transducer, draw-gear and displacement transducer are electrically connected with the control WT-MSR respectively.Can drive moving up and down of tracking transducer through pull-in cable, follow the tracks of the position of surveying the magnetic float, thereby detect the position of liquid level, realize the purpose of measuring liquid level in this way.Make simple, high, the applied range of measuring accuracy, can realize continuous liquid level measuring.
Description of drawings
The tracking mode that Fig. 1 provides for the embodiment of the invention is surveyed the structural representation one of the device of liquid level;
The tracking mode that Fig. 2 provides for the embodiment of the invention is surveyed the structural representation two of the device of liquid level.
Among the figure: 1. magnetic float, 2. guide pole, 21. times locating rings, locating ring on 22., 23. flanges, 24. heat radiator; 3. tracking transducer, 4. pull-in cable, 5. electronics storehouse shell, 6. steering mechanism's assembly, 60. turn to bend pipe, 61. install adjustment hole blind bolts; 62. the install adjustment hole, 63. fixed pulleys, 64. connecting links, 71. one-level gears, 72. secondary gears, 73. angular displacement sensors; 74. line storage wheel, 8. stepper motor, 9. control circuit board, 91. display screens, 92. communication interfaces, 93. angular displacement sensor interfaces; 94. power module, 95. tracking transducer interfaces, 96. power interfaces, 97.CPU, 98. step motor control interfaces, 99. keystroke interface.
Embodiment
To combine accompanying drawing that the embodiment of the invention is done to describe in detail further below.
Tracking mode of the present invention is surveyed the device of liquid level, and its preferable embodiment is:
Comprise magnetic float, pull-in cable, draw-gear, guide pole, tracking transducer, control WT-MSR;
Said magnetic float center is penetrating to be enclosed within on the said guide pole, and the inside of said magnetic float is equipped with small magnetic needle;
Said guide pole boring, said tracking transducer is located at the inside of said guide pole, and said tracking transducer is a magnetic induction sensor;
Said tracking transducer is connected with draw-gear through pull-in cable, and said pull-in cable is provided with displacement transducer;
Said tracking transducer, draw-gear and displacement transducer are electrically connected with said control WT-MSR respectively.
The bottom of said guide pole can be fixed with down locating ring, and the top of said guide pole can be fixed with locating ring, flange and heat radiator etc.
The inside of said locating ring down and last locating ring all can be equipped with small magnetic needle.
Said magnetic induction sensor is preferably magnetoresistive transducer.
Said draw-gear, control WT-MSR and displacement transducer can be located in the shell of electronics storehouse, and said draw-gear can be stepper motor, and said displacement transducer can be angular displacement sensor, and said electronics storehouse shell can be located at the top of said guide pole;
Can be provided with one-level gear and secondary gear in the shell of said electronics storehouse; Said pull-in cable is walked around said one-level gear and is wrapped on the line storage wheel; Said line storage wheel is connected with the driving shaft of said stepper motor; Said one-level gear and secondary gear engagement, this takes turns coaxial the connection said angular displacement sensor and said secondary.
Said control WT-MSR comprises control circuit board, and said control circuit board can be provided with display screen, communication interface, angular displacement sensor interface, power module, tracking transducer interface, power supply interface, CPU, step motor control interface and keystroke interface etc.
Said electronics storehouse shell can be connected with the top of said guide pole through steering mechanism's assembly.
Said steering mechanism assembly can comprise and turns to bend pipe and connecting link etc.; Said turning to is provided with fixed pulley in the bend pipe; Said pull-in cable is walked around said fixed pulley, can be provided with the install adjustment hole on the said wall that turns to bend pipe, and said install adjustment hole is provided with install adjustment hole blind bolt.
Said pull-in cable can comprise multicore cable, nylon wire harness and sheath etc.
Tracking mode of the present invention is surveyed the device of liquid level, easy for installation, measure accurately, dependable performance, can realize continuous liquid level measuring.Facing its structure and principle down further describes:
General thought of the present invention is, overcomes the deficiency that exists in existing product and the technology, makes full use of the development result of electronic technology and device new technology, develops a kind of novel liquid level measurement mechanism, and provides a kind of tracking mode to survey the method and apparatus of liquid level.
The present invention mainly comprises magnetic float, guide pole, pull-in cable, electronics storehouse shell, steering mechanism's assembly, one-level gear, secondary gear, angular displacement sensor, line storage wheel, stepper motor and several parts of control circuit board; Be fixed with down locating ring on the guide pole, go up locating ring, flange and cooling fin part; Steering mechanism's assembly comprises and turns to bend pipe, install adjustment hole blind bolt, install adjustment hole, fixed pulley and connecting link; Display screen, communication interface, angular displacement sensor interface, power module, tracking transducer interface, power supply interface, CPU, step motor control interface and the several functional modules of keystroke interface are arranged on the control circuit board; This structure can be accomplished under the control of control circuit board; By forward and reverse rotation of stepper motor, drive moving up and down of tracking transducer through pull-in cable, follow the tracks of the position of surveying the magnetic float; Thereby detect the position of liquid level, realize the purpose of measuring liquid level in this way.
Further, said magnetic float is made up of shell and the inner small magnetic needle of installing, and magnetic float center is penetrating, be enclosed within on the guide pole, and guide pole moves up and down in the buoyancy function lower edge.
Further, said guide pole is made by stainless-steel tube, bottom end seal, and boring, tracking transducer moves up and down in inside, and guide pole upper end and bottom are fixed with down locating ring and last locating ring respectively.
Further; Said locating ring down and last locating ring constitute by shell and the inner small magnetic needle of installing; Tracking transducer moves up and down under pull-in cable drives, and the magnet in the ability perceptual positioning ring, thereby finds down the position of locating ring and last locating ring; Because of the distance of two locating rings is certain, this structure has guaranteed the realization of self-calibration measuring method.
Further; Said tracking transducer is made up of magnetic induction sensor, shell and interface; And is connected with pull-in cable through interface, said magnetic induction sensor can be selected the magnetoresistive transducer of low-power consumption as required, and supplies power and the information transmission through the pull-in cable realization; The weight of said tracking transducer can be selected according to measurement range and the required friction force of whole rotating mechanism; Said tracking transducer is installed on the inside of guide pole, and it can vertically move up and down in guide pole under the effect of pull-in cable, and said tracking transducer can detect down locating ring, go up the internal magnetic field of locating ring and magnetic float; Be their position, and send position signal information the CPU of control circuit board to through pull-in cable.
Further; Said pull-in cable is made up of multicore cable, nylon wire harness and sheath; The one of which end is connected with tracking transducer; The other end is connected with the tracking transducer interface of control circuit board, has realized the induced signal of tracking transducer and the cpu i/f of control circuit board, also plays the effect of traction tracking transducer simultaneously.
Further, said steering mechanism assembly comprises and turns to bend pipe, install adjustment hole blind bolt, install adjustment hole, fixed pulley and connecting link, realizes separating of measure portion that electronics storehouse part is interior with being installed in tank body, increased the dirigibility of device fabrication.
Further, said one-level gear, secondary gear, angular displacement sensor, line storage wheel, stepper motor several sections have constituted linkage, have realized the measurement of the mobile and liquid level of tracking transducer; On said one-level gear and the secondary gear gear teeth are arranged, and through tooth mesh, said secondary gear is connected with angular displacement sensor is coaxial; The fluted structure of said one-level gear is used to place pull-in cable, and pull-in cable is pressed on the one-level gear groove; Friction force through pull-in cable and one-level gear groove drives the rotation of one-level gear; And then drive the secondary gear rotation, and make the same angular turn of angular displacement sensor, realize the measurement that the angular displacement sensor angle changes; CPU has realized surveying the method for liquid level according to the variation that algorithm computation goes out the liquid level position.
Further, said line storage wheel is connected with stepper motor is coaxial, and pull-in cable is wrapped on the line storage wheel.
Advantage of the present invention is: overcome the difficulty that various parts are made, tracking transducer needs just ability operate as normal of very little magnetic induction density, when CPU finds the tracking transducer induction less than magnetic signal, the control step motor is moved near liquid level; Pick up the magnetic float, follow the tracks of the measurement of the method realization liquid level of magnetic float like this through tracking transducer, further; Owing to increased devices such as one-level gear and secondary gear, can very little displacement of the lines be transformed to the big angular displacement that gets, thereby realize high-acruracy survey; Further, owing to guide pole can seal fully, therefore; Can be adapted to detect respectively and in the environment the exigent occasion of liquid level, particularly measuring accuracy of various liquid, in a word; The present invention realizes simply, and is reliable, can accomplish the metering level of liquid level is measured.
Specific embodiment:
As shown in Figure 1; Manufacture and design magnetic float 1, guide pole 2, following locating ring 21, go up locating ring 22, flange 23, heat radiator 24, tracking transducer 3, pull-in cable 4, turn to bend pipe 60, install adjustment hole blind bolt 61, fixed pulley 63, connecting link 64; Select the length of guide pole 2 during practical implementation according to measurement range; Require to select the thickness of magnetic float 1 and guide pole 2 according to gaging pressure; The bottom of guide pole 2 is sealed, and flange 23 and heat radiator 24 are welded on the guide pole 2, put into the inner structure fabrication of liquid container and accomplish.
To turn to bend pipe 60, install adjustment hole blind bolt 61, fixed pulley 63 and connecting link 64 to be installed together, form steering mechanism's assembly 6, install to the top of guide pole 2; Said steering mechanism assembly 6 purposes are that maintenance pull-in cable 4 and the side dress of realizing electronics storehouse shell 5 are installed; Being fit to various operating modes, during practical implementation, back out behind the install adjustment hole blind bolt 61 adjustment or the replacing that can implement pull-in cable 4 through install adjustment hole 62; The present invention considers actual needs in addition; For the simplified measurement device can not installed steering mechanism's assembly 6 parts, use the top dress also can, be about to the top that electronics storehouse shell 5 directly installs to guide pole 2.
Said magnetic float 1 is made up of shell and the inner small magnetic needle of installing; Shell is selected stainless steel or titanium steel welding production for use; Inner small magnetic needle N, S extreme direction are radially placed, and under the requirement of satisfying magnetic induction density, use less needle as far as possible; The weight of whole magnetic float 1 can be alleviated like this, thereby under the certain situation of fluid density, the volume of magnetic float 1 can be reduced.Magnetic float 1 center is penetrating, be enclosed within on the guide pole 2, and guide pole 2 moves up and down in the buoyancy function lower edge.
Said guide pole 2 is made by stainless-steel tube, and boring, and inner wall smooth can reduce the friction force that tracking transducer 3 moves up and down in inside like this.
Said locating ring 21 down uses stainless steel or other not to have the material of magnetic shield performance with last locating ring 22, and inner small magnetic needle N, S extreme direction are radially placed.
Said tracking transducer 3 can not have the magnetic shielding materials with function to make with stainless steel or other; Fixing or glue envelope after inside can be installed Hall element or reserved service wire; The web member of upwards drawing can use the high-performance aviation plug, and notices that extraction location as far as possible along axis direction, helps tracking transducer 3 like this and is in good vertical state; Reduce friction force with guide pole 2; When making, also to adjust the overall weight of tracking transducer 3 in addition according to actual needs, pull-in cable 4 stretched, increase friction force simultaneously with one-level gear 71 with assurance.
Said pull-in cable 4 inside have three leads at least, be to guarantee necessary strength, and inner several nylon wire harness or the net of increasing, and in addition the glue envelope is made a cable is to guarantee the precision measured, and the rigidity of cable is too not strong.
As shown in Figure 2; Design and produce parts such as electronics storehouse shell 5, one-level gear 71, secondary gear 72, angular displacement sensor 73, line storage wheel 74, control circuit board 9; When producing with one-level gear 71, secondary gear 72, angular displacement sensor 73, line storage wheel 74 and control circuit board 9; Be installed in the electronics storehouse shell 5, and various lead-in wires the corresponding interface with control circuit board 9 is connected.
Said one-level gear 71 cylindricals are processed with the gear teeth and groove, and groove is used to place pull-in cable 4.
On the said secondary gear 72 gear teeth are arranged; Through the gear teeth and 71 engagements of one-level gear; Angular displacement sensor 73 and secondary gear 72 coaxial being fixed on the electronics storehouse shell 5; Do to guarantee when identical liquid level change, to obtain higher measuring accuracy like this, said in addition angular displacement sensor 73 can be selected the linearity resistance-type angular displacement sensor or Hall element preferably for use.
Said line storage wheel 74 and stepper motor 8 coaxial being fixed on the electronics storehouse shell 5, the size of line storage wheel 74 is selected according to measurement range, and stepper motor 8 is selected for use according to the needs of actual torsion.
Said control circuit board 9 is made up of display screen 91, communication interface 92, angular displacement sensor interface 93, power module 94, tracking transducer interface 95, power interface 96, CPU97, step motor control interface 98 and keystroke interface 99 several functional modules; Said display screen 91 is realized the demonstration of various information; Said communication interface 92 can realization and being connected and data transmission of host computer or other equipment; Said angular displacement sensor interface 93 is used for joint angle displacement transducer 73; Said power module 94 is used to the total system power supply, and said tracking transducer interface 95 is connected with tracking transducer 3, and said power interface 96 connects the externally fed power supply; Said CPU97 is the control core of total system and with each functional module is arranged being connected of circuit; CPU97 can select multiple processors such as AVR, ARM7 for use, and said step motor control interface 98 is connected with stepper motor 8, and said keystroke interface more than 99 is connected and passes through the parameter setting of button implement device needs with button.
After each parts of device complete, through behind the assembly and adjustment, in CPU97, write the embedded Control program, can carry out the tracking and the measurement of liquid level, introduce the principle of work that this tracking mode is surveyed the device of liquid level below in detail:
The magnetic float 1 of putting into liquid can move up and down along guide pole 2 along with liquid level variation, that is to say that the magnetic field of magnetic float 1 changes, and tracking transducer 3 will detect the variation in this magnetic field; Because CPU97 is connected with tracking transducer 3 through pull-in cable 4, CPU97 can detect the step-out in tracking transducer 3 and magnetic field in a short period of time, and CPU97 control step motor 8 at once moves among a small circle; As for moving up or moving down, CPU97 can be according to the situation of liquid level variation last time, if liquid level rises; CPU97 control control step motor 8 forward rotation, thus line storage wheel 74 is stored up pull-in cable 4 to line storage wheel 74, because pull-in cable 4 is pressed in the groove of one-level gear 71; Friction force between them will drive one-level gear 71 forward rotation; One-level gear 71 drives secondary gear 72 simultaneously and rotates, and finally drives the rotation of angular displacement sensor 73, and tracking transducer 3 moves up under the traction of pull-in cable 4; This a series of rotation and mobile proceeding; Trace into the magnetic field of magnetic float 1 up to tracking transducer 3 after, CPU97 control control step motor 8 stops operating, and calculates the angle that angular displacement sensor 73 changes then; And according to the variation relation of angular displacement and displacement of the lines; Calculate height that liquid level rises and present liquid level value, and a plurality of parameters such as current moving direction, liquid level, current value of angular displacement are stored and shown, accomplish the process of this tracking measurement that causes because of liquid level change at last.It should be noted that; In this forward rotation process; Though the vertical direction of tracking transducer 3 changes certain, because the structure and the variable speed relationship of one-level gear 71 and secondary gear 72 not only are converted into angular displacement with displacement of the lines; Simultaneously certain multiple is amplified in angular displacement, thereby realized high-acruracy survey.
The measurement that liquid level descends is identical therewith with implementation procedure, repeats no more here.Detail below from the implementation process of demarcating.
Through after a while operation, or since the variation tracking transducer 3 of liquid level can not trace into magnetic float 1 very soon the time, CPU97 control step motor 8 backward rotation; Tracking transducer 3 can be owing to self gravitation and unbalance the moving downward of pulling force that receives pull-in cable 4; After tracking transducer 3 detected down locating ring 21, CPU97 control step motor 8 stopped operating, and current liquid level is made as zero elevation, current value of angular displacement was set to zero; CPU97 control step motor 8 forward rotation then; Tracking transducer 3 can move upward under the pulling of pull-in cable 4, and after tracking transducer 3 detected locating ring 22, CPU97 control step motor 8 stopped operating; And with current liquid level be made as the full scale height, current value of angular displacement is set to the maximum angular displacement value; Because the distance of locating ring 21 and last locating ring 22 has been provided with through button when producing down, CPU97 can go out the corresponding relation of angular displacement and liquid level according to algorithm computation, has realized that promptly index is fixed.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (9)
1. the device of a tracking mode survey liquid level is characterized in that, comprises magnetic float, pull-in cable, draw-gear, guide pole, tracking transducer, control WT-MSR;
Said magnetic float center is penetrating to be enclosed within on the said guide pole, and the inside of said magnetic float is equipped with small magnetic needle;
Said guide pole boring, said tracking transducer is located at the inside of said guide pole, and said tracking transducer is a magnetic induction sensor;
Said tracking transducer is connected with draw-gear through pull-in cable, and said pull-in cable is provided with displacement transducer;
Said tracking transducer, draw-gear and displacement transducer are electrically connected with said control WT-MSR respectively.
2. tracking mode according to claim 1 is surveyed the device of liquid level, it is characterized in that the bottom of said guide pole is fixed with down locating ring, and the top of said guide pole is fixed with locating ring, flange and heat radiator.
3. tracking mode according to claim 2 is surveyed the device of liquid level, it is characterized in that, the inside of said locating ring down and last locating ring all is equipped with small magnetic needle.
4. tracking mode according to claim 1 is surveyed the device of liquid level, it is characterized in that said magnetic induction sensor is a magnetoresistive transducer.
5. survey the device of liquid level according to each described tracking mode of claim 1 to 4; It is characterized in that; Said draw-gear, control WT-MSR and displacement transducer are located in the shell of electronics storehouse; Said draw-gear is a stepper motor, and said displacement transducer is an angular displacement sensor, and said electronics storehouse shell is located at the top of said guide pole;
Be provided with one-level gear and secondary gear in the shell of said electronics storehouse; Said pull-in cable is walked around said one-level gear and is wrapped on the line storage wheel; Said line storage wheel is connected with the driving shaft of said stepper motor; Said one-level gear and secondary gear engagement, this takes turns coaxial the connection said angular displacement sensor and said secondary.
6. tracking mode according to claim 5 is surveyed the device of liquid level; It is characterized in that; Said control WT-MSR comprises control circuit board, and said control circuit board is provided with display screen, communication interface, angular displacement sensor interface, power module, tracking transducer interface, power supply interface, CPU, step motor control interface and keystroke interface.
7. tracking mode according to claim 5 is surveyed the device of liquid level, it is characterized in that, said electronics storehouse shell is connected with the top of said guide pole through steering mechanism's assembly.
8. tracking mode according to claim 7 is surveyed the device of liquid level; It is characterized in that; Said steering mechanism assembly comprises and turns to bend pipe and connecting link, and said turning to is provided with fixed pulley in the bend pipe, and said pull-in cable is walked around said fixed pulley; The said wall of bend pipe that turns to is provided with the install adjustment hole, and said install adjustment hole is provided with install adjustment hole blind bolt.
9. tracking mode according to claim 5 is surveyed the device of liquid level, it is characterized in that said pull-in cable comprises multicore cable, nylon wire harness and sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104275230A CN102445254A (en) | 2011-12-19 | 2011-12-19 | Device for measuring liquid level in tracking mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104275230A CN102445254A (en) | 2011-12-19 | 2011-12-19 | Device for measuring liquid level in tracking mode |
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| CN102445254A true CN102445254A (en) | 2012-05-09 |
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| CN2011104275230A Pending CN102445254A (en) | 2011-12-19 | 2011-12-19 | Device for measuring liquid level in tracking mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217139A (en) * | 2013-03-28 | 2013-07-24 | 重庆理工大学 | Dual probe-based angular displacement transducer on-line self-calibration method |
| CN105136240A (en) * | 2015-05-13 | 2015-12-09 | 重庆工业职业技术学院 | Liquid level sensor |
| CN105352562A (en) * | 2015-12-04 | 2016-02-24 | 中国原子能科学研究院 | Induction type servo liquid metal liquid level measurement device and method |
| CN110699928A (en) * | 2019-11-14 | 2020-01-17 | 珠海格力电器股份有限公司 | Detergent box, automatic feeding device, washing machine and automatic feeding method thereof |
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| CN1257996A (en) * | 1998-12-24 | 2000-06-28 | 杜国凯 | Magnetic float position transducer |
| CN2580419Y (en) * | 2002-11-22 | 2003-10-15 | 周继宏 | Multifunction level meter for oil tank |
| CN1470853A (en) * | 2003-06-20 | 2004-01-28 | 天津大学 | Self-rating and temperature-drift-removable magnetostriction level sensor |
| CN202372231U (en) * | 2011-12-19 | 2012-08-08 | 北京京仪海福尔自动化仪表有限公司 | Tracking device for measuring liquid level |
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| CN1257996A (en) * | 1998-12-24 | 2000-06-28 | 杜国凯 | Magnetic float position transducer |
| CN2580419Y (en) * | 2002-11-22 | 2003-10-15 | 周继宏 | Multifunction level meter for oil tank |
| CN1470853A (en) * | 2003-06-20 | 2004-01-28 | 天津大学 | Self-rating and temperature-drift-removable magnetostriction level sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217139A (en) * | 2013-03-28 | 2013-07-24 | 重庆理工大学 | Dual probe-based angular displacement transducer on-line self-calibration method |
| CN105136240A (en) * | 2015-05-13 | 2015-12-09 | 重庆工业职业技术学院 | Liquid level sensor |
| CN105352562A (en) * | 2015-12-04 | 2016-02-24 | 中国原子能科学研究院 | Induction type servo liquid metal liquid level measurement device and method |
| CN110699928A (en) * | 2019-11-14 | 2020-01-17 | 珠海格力电器股份有限公司 | Detergent box, automatic feeding device, washing machine and automatic feeding method thereof |
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Application publication date: 20120509 |