CN2788152Y - Magnetostrictive liquid level sensor - Google Patents
Magnetostrictive liquid level sensor Download PDFInfo
- Publication number
- CN2788152Y CN2788152Y CN 200520011318 CN200520011318U CN2788152Y CN 2788152 Y CN2788152 Y CN 2788152Y CN 200520011318 CN200520011318 CN 200520011318 CN 200520011318 U CN200520011318 U CN 200520011318U CN 2788152 Y CN2788152 Y CN 2788152Y
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- CN
- China
- Prior art keywords
- circuit board
- liquid level
- float
- sensor
- string wire
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a magnetostrictive liquid level sensor, which is composed of a transmitter, a sensor and a float, wherein a circuit board bracket (8) and a circuit board (22) are arranged in a casing (3) of the transmitter; an insulating board (28), an upper end damping pressing plate (29), an upper end damping (16) and the circuit board bracket (8) are fixed together; a steel wire (15) penetrates through the middle of the upper end damping (16); the steel wire (15) is pressed on a piezoelectric ceramic (17); the piezoelectric ceramic (17) is connected with the circuit board (22) by a leading wire; an aluminum slot (7) is arranged in a sensor outer pipe (6); an inquiring electric pulse return circuit leading wire (19) penetrates through the aluminum slot (7) and is connected with the circuit board (22); an insulating fixing sleeve (12) is arranged in the lower end of the sensor outer pipe (6); floats (23, 27) which are connected in a sliding mode are arranged between the lower end damping (18) and a steel wire tension spring (11) and between a fixing shaft (10) on the lower end of the steel wire and the sensor outer pipe (6). The utility model has the advantages of simple technology, high production efficiency, stable and reliable performance, low cost and enhanced product competitiveness.
Description
Technical field
The utility model belongs to a kind of liquid level sensor, relates in particular to a kind of magnetostrictive liquid level sensor.
Background technology
Traditional liquid level sensor is to comprise transmitter, sensor and float, vibro-pickup in the transmitter is the coil vibro-pickup, form by biasing magnet, pick-up coil and tongue iron, the connected mode of the winding process of the position of its biasing magnet, bias field intensity, pick-up coil, the material of tongue iron and tongue iron and magnetostriction string wire all influences the stability of sensor, and manufacture craft is too complicated.
Summary of the invention
Goal of the invention of the present utility model provides the simple magnetostrictive liquid level sensor of a kind of manufacture craft.
The purpose of this utility model is achieved in that it is by transmitter, sensor and float are formed, power supply and signaling interface are equipped with in the upper end that it is characterized in that the transmitter housing, enclosure interior is equipped with circuit board support, circuit board support is fixedlyed connected with the lower end of transmitter housing, circuit board is fixed on the circuit board support, upper end string wire gib screw is with insulcrete, circuit board support and string wire are fixed together, upper end damping pressing plate, upper end damping and circuit board support are fixed together, string wire passes in the middle of the damping of upper end, string wire is pressed on the piezoelectric ceramics, one end of piezoelectric ceramics is fixedlyed connected with insulcrete, the other end is a free end, and string wire contacts with the free end of piezoelectric ceramics, piezoelectric ceramics is connected with circuit board by lead-in wire, sensor outer tube upper end is tightly connected by the lower end of seal-locking mechanism and O-ring seal and transmitter housing, the aluminium groove is arranged in the sensor outer tube, inquiry electric pulse loop lead-in wire passes the aluminium groove and links to each other with circuit board, the sensor outer tube has the insulation fixed cover in the lower end, in the insulation fixed cover lower end damping is housed, string wire back-moving spring and string wire lower end stationary shaft, string wire is fixedlyed connected from middle the passing with string wire lower end stationary shaft of lower end damping, sensor outer tube lower end is fixed with the float ring washer, and the float that is slidingly connected is housed in the middle of the sensor outer tube.
Aforesaid float is by comprising: float shell, skeleton, pole piece, weight stack are formed.The float shell is sphere or cylindricality, and is middle porose, can be enclosed within on the sensor outer tube and slide.By adjusting the weight of weight stack, can change the global density of float, so that make the liquid interface of buoys float at liquid surface or two kinds of different densities.
1-20 is individual as required for the aforesaid float that slides on the sensor outer tube
Aforesaid transmitter housing is draw ring, upper end cover, transmitter shell, bottom end cover, seal-locking mechanism, O-ring seal composition.
Aforesaid string wire is to be made by magnetostriction materials.
This patent piezoelectric ceramics is the pick-up element, need not magnetic bias, does not also need tongue iron.As long as string wire is pressed on the piezoelectric ceramics, suitably adjust the distance between upper end damping and the piezoelectric ceramics, just can obtain returning pulse.
The circuit of circuit board is made up of central controller, power control circuit, signaling conversion circuit, pulse generating circuit, amplifier and comparer as mentioned above.
Magnetostrictive liquid level sensor is to try to achieve the liquid level of surveying by the float position that measurement floats over the fluid to be measured liquid level.During use,, calculate the weight of weight stack, make float can accurately float over each layer fluid to be measured interphase earlier according to the density of each layer fluid to be measured.Float is enclosed within on the sensor outer tube according to density and order, locks the float ring washer.Then sensor is vertically fixed in the fluid to be measured.
The utlity model has following advantage:
(1) technology is simple, the production efficiency height.
(2) stable and reliable for performance.
(3) cost is low, improves product competitiveness.
Embodiment
The drawing explanation
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that A of the present utility model is to the structure for amplifying synoptic diagram
Fig. 3 is a B-B structure for amplifying synoptic diagram of the present utility model.
Fig. 4 is a circuit diagram of the present utility model.
Fig. 5 is the structural representation of float of the present utility model.
Fig. 6 is the structural representation of transmitter vibro-pickup in the prior art of the present utility model.
As shown in the figure, transmitter housing 3 is draw ring 1, upper end cover 2, transmitter shell, bottom end cover 4, seal-locking mechanism 5, O-ring seal 14 compositions.Upper end cover 2 is equipped with power supply and signaling interface 21, circuit board support 8 is equipped with in housing 3 inside, circuit board support 8 is fixedlyed connected with the bottom end cover 4 of transmitter housing 3, circuit board 22 is fixed on the circuit board support 8, upper end string wire gib screw 9 is with insulcrete 28, circuit board support 8 and string wire 15 are fixed together, upper end damping pressing plate 29, upper end damping 16 and circuit board support 8 are fixed together, string wire 15 passes in the middle of upper end damping 16, string wire 15 is pressed on the piezoelectric ceramics 17, one end of piezoelectric ceramics 17 is fixedlyed connected with insulcrete 28, the other end is a free end, and string wire 15 contacts with the free end of piezoelectric ceramics 17, piezoelectric ceramics 17 is connected with circuit 22 by lead-in wire, sensor outer tube 6 upper ends are tightly connected by the bottom end cover 4 of seal-locking mechanism 5 and O-ring seal 14 and transmitter housing 3, aluminium groove 7 is arranged in the sensor outer tube 6, inquiry electric pulse loop lead-in wire 19 passes aluminium groove 7 and links to each other with circuit board 22, insulation fixed cover 12 is arranged in sensor outer tube 6 lower ends, in the insulation fixed cover 12 lower end damping 18 is housed, string wire back-moving spring 11 and string wire lower end stationary shaft 10, string wire 15 is fixedlyed connected from lower end damping 18 middle passing with string wire lower end stationary shaft 10, sensor outer tube 6 lower ends are fixed with float ring washer 13, and the float 23 that is slidingly connected is housed in the middle of the sensor outer tube 6,27.
Float the 23, the 27th is made up of float shell 30, skeleton 24, pole piece 25, weight stack 26.Float shell 30 is sphere or cylindricality, and is middle porose, can be enclosed within on the sensor outer tube 6 and slide.
The 20th, signal wire, the 31st, biasing magnet, the 32nd, pick-up coil, the 33rd, tongue iron.
Probe power is inserted by power interface 42, and the analog power VCC that is 5 volts through the digital power VDD and the voltage of 3.3 volts of power control circuit 41 output voltages is respectively digital circuit and mimic channel is powered.Integrated circuit is by microcomputer 36 controls, and microcomputer 36 connects signal bus by interface circuit 35, signaling interface 34, gets in touch with host computer.Interface circuit can be 485 change-over circuits, also can be the 4-20mA change-over circuit.Host computer can be PC, secondary table or other control system.Pulse generating circuit 37 sends about 20 volts interrogation pulse under microcomputer 36 controls.This pulse can be produced by voltage-multiplying circuit.The tension pulse of float is received by vibro-pickup 38, amplifies through amplifier 39, and microcomputer 36 is sent in comparer 40 shapings.The proportional amplifier that amplifier 39 is formed for high speed operation amplifier, comparer is a general-purpose chip, as LM393.Vibro-pickup is a reception type piezoelectric ceramic piece, as Fig. 3.During work, when microcomputer 36 passes through signal bus, after interface circuit 35 receives the host computer order, give an order to pulse generating circuit 37, produce an interrogation pulse by pulse generating circuit 37, this pulse has produced a vertical toroidal magnetic field along the waveguide filament direction in waveguide filament 15.Permanent-magnetic field in toroidal magnetic field and the float interacts, produce magnetostrictive effect, waveguide filament is twisted, produce tension pulse, tension pulse transmits along 15 fens two-way of waveguide filament, one the tunnel by 18 absorptions of lower end damper, another curb waveguide wire 15 returns by vibro-pickup 38 and receives, amplify through amplifier 39, by comparer 40 shapings, form that microcomputer 36 is discernible to return pulse, microcomputer 36 is by calculating interrogation pulse and returning mistiming between the pulse, can accurately measure the position of tested float, thereby obtain the liquid level of fluid to be measured.
Claims (8)
1, it is by transmitter for a kind of magnetostrictive liquid level sensor, sensor and float are formed, power supply and signaling interface (21) are equipped with in the upper end that it is characterized in that transmitter housing (3), circuit board support (8) is equipped with in housing (3) inside, circuit board support (8) is fixedlyed connected with the lower end of transmitter housing (3), circuit board (22) is fixed on the circuit board support (8), upper end string wire gib screw (9) is with insulcrete (28), circuit board support (8) and string wire (15) are fixed together, upper end damping pressing plate (29), upper end damping (16) and circuit board support (8) are fixed together, string wire (15) passes in the middle of upper end damping (16), string wire (15) is pressed on the piezoelectric ceramics (17), one end of piezoelectric ceramics (17) is fixedlyed connected with insulcrete (28), the other end is a free end, and string wire (15) contacts with the free end of piezoelectric ceramics (17), piezoelectric ceramics (17) is connected with circuit board (22) by lead-in wire, sensor outer tube (6) upper end is tightly connected by the lower end of seal-locking mechanism (5) and O-ring seal (14) and transmitter housing (3), aluminium groove (7) is arranged in the sensor outer tube (6), inquiry electric pulse loop lead-in wire (19) passes aluminium groove (7) and links to each other with circuit board (22), sensor outer tube (6) has insulation fixed cover (12) in the lower end, in the insulation fixed cover (12) lower end damping (18) is housed, string wire back-moving spring (11) and string wire lower end stationary shaft (10), string wire (15) is fixedlyed connected from middle the passing with string wire lower end stationary shaft (10) of lower end damping (18), sensor outer tube (6) lower end is fixed with float ring washer (13), and the float (23 that is slidingly connected is housed in the middle of the sensor outer tube (6), 27).
2, a kind of magnetostrictive liquid level sensor as claimed in claim 1 is characterized in that described float (23,27) is made up of float shell (30), skeleton (24), pole piece (25), weight stack (26).
3, a kind of magnetostrictive liquid level sensor as claimed in claim 2 is characterized in that float (23,27) shells (30) are sphere or cylindricality, and is middle porose.
4, a kind of magnetostrictive liquid level sensor as claimed in claim 1 is characterized in that the described float (23,27) that upward slides at sensor outer tube (6) is 1-20.
5, a kind of magnetostrictive liquid level sensor as claimed in claim 1 is characterized in that described transmitter housing (3) is draw ring (1), upper end cover (2), transmitter shell, bottom end cover (4), seal-locking mechanism (5), O-ring seal (14) composition.
6, a kind of magnetostrictive liquid level sensor as claimed in claim 1 is characterized in that described string wire (15) is to be made by magnetostriction materials.
7, a kind of magnetostrictive liquid level sensor as claimed in claim 1 is characterized in that piezoelectric ceramics (17) is the pick-up element.
8, a kind of magnetostrictive liquid level sensor as claimed in claim 1 is characterized in that the circuit of described circuit board (22) is made up of central controller (36), power control circuit (41), signaling conversion circuit, pulse generating circuit (37), amplifier (39) and comparer (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520011318 CN2788152Y (en) | 2005-04-04 | 2005-04-04 | Magnetostrictive liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520011318 CN2788152Y (en) | 2005-04-04 | 2005-04-04 | Magnetostrictive liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2788152Y true CN2788152Y (en) | 2006-06-14 |
Family
ID=36786447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520011318 Expired - Fee Related CN2788152Y (en) | 2005-04-04 | 2005-04-04 | Magnetostrictive liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2788152Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254042A (en) * | 2016-12-29 | 2018-07-06 | 中国科学院沈阳自动化研究所 | A kind of deep-sea liquid level detecting sensor |
| CN108955835A (en) * | 2018-08-29 | 2018-12-07 | 天长市瑞达仪表电缆材料厂 | A kind of flexible liquidometer of high reliability maglev type |
| CN109764929A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | A kind of piezoelectric type intelligence solution deep measuring device and measuring method |
| CN109764927A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | Float-type intelligence solution deep measuring device and measuring method |
-
2005
- 2005-04-04 CN CN 200520011318 patent/CN2788152Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254042A (en) * | 2016-12-29 | 2018-07-06 | 中国科学院沈阳自动化研究所 | A kind of deep-sea liquid level detecting sensor |
| CN108955835A (en) * | 2018-08-29 | 2018-12-07 | 天长市瑞达仪表电缆材料厂 | A kind of flexible liquidometer of high reliability maglev type |
| CN109764929A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | A kind of piezoelectric type intelligence solution deep measuring device and measuring method |
| CN109764927A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | Float-type intelligence solution deep measuring device and measuring method |
| CN109764929B (en) * | 2019-03-14 | 2023-10-13 | 长沙学院 | Piezoelectric intelligent solution depth 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060614 |