CN2788178Y - Automatic liquid interfacial tension detector - Google Patents
Automatic liquid interfacial tension detector Download PDFInfo
- Publication number
- CN2788178Y CN2788178Y CN 200520039453 CN200520039453U CN2788178Y CN 2788178 Y CN2788178 Y CN 2788178Y CN 200520039453 CN200520039453 CN 200520039453 CN 200520039453 U CN200520039453 U CN 200520039453U CN 2788178 Y CN2788178 Y CN 2788178Y
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- CN
- China
- Prior art keywords
- electronic balance
- liquid
- utility
- surface tension
- model
- Prior art date
- 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 - Lifetime
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Abstract
The utility model relates to an automatic liquid surface tension detector which comprises an automatic up and down lifting mechanism and a measuring force sensing mechanism. The automatic liquid surface tension detector is characterized in that the measuring force sensing mechanism is an electronic balance based on an electromagnetic force equilibrium principle. Because the utility model adopts a closed-loop mode electromagnetic force balanced type electronic balance to be used as a force cell, when a vessel containing liquid is placed on a platform of the automatic up and down lifting mechanism, the liquid surface contacts a test board hung under the bearing end of a transverse beam of the electronic balance. Because of the tension action of the liquid, the transverse beam of the electronic balance deflects, and photoelectric detection signals change. The photoelectric detection signs are enlarged, and an electromagnetic force back coupling mechanism of the electronic balance is driven to cause the transverse beam to return to the original balance position. At this time, the measured current reflecting the tension of the liquid is transformed by an A-D and processed by a microcomputer, and the tension values of the measured liquid are digitally displayed. The utility model can fully measure, check by self and clear zero; the platform can automatically lift; the utility model is provided with an up and down stop device and has advantages of simple operation, high accuracy, good repeatability and fast measure.
Description
Technical field
The utility model relates to a kind of automated fluid surface (interface) tension force detector.
Background technology
Existing surface tension of liquid detecting instrument generally is made up of oscilaltion mechanism and force sensor, wherein, force sensor adopts strain transducer or with the differential transformation sensor of pull spring, they all are to add the open loop circuit that A/D (analog/digital) conversion shows with mimic channel, regulate zero-bit and full scale with potentiometer, need during use to adjust repeatedly, operation is inconvenient, correctness is poor, testing range is also narrow, easy break-down.
The utility model content
The purpose of this utility model be to provide a kind of have simple to operate, degree of accuracy is high, good reproducibility and measure automated fluid surface tension detector fast.
A kind of automated fluid surface tension detector provided by the utility model, comprise automatic oscilaltion mechanism and force sensor, it is characterized in that: described force sensor is an electronic balance that adopts the electromagnetic force equilibrium principle to make, and the liquid level in the liquid vessel of putting in the test board that hangs under the crossbeam load-bearing end by this electronic balance and the described automatic oscilaltion mechanism contacts and carries out the tension force detection.
In above-mentioned automated fluid surface tension detector, the signal output part of electronic balance also connects A/D conversion circuit, microprocessor and display in regular turn.
In above-mentioned automated fluid surface tension detector, automatically oscilaltion mechanism two conical gear, screw rod that moves up and down and the platform of fixedlying connected that comprise motor, be connected with this screw rod with this drive of motor, and platform moved up and down carry out spacing structure.
The utility model liquid surface (interface) tension force detector is to adopt the electromagnetic force balancing type electronic balance principle of closed-loop fashion as force cell, when the vessel of carrying liquid are placed on the platform of automatic oscilaltion structure, the test board that plays under liquid level and the electronic balance crossbeam load-bearing end contacts, because liquid tension effect, crossbeam deflects, photoelectric detecting signal changes, and through amplifying, drives the generation of electromagnetic force feedback mechanism and makes crossbeam be returned to original equilibrium position.The electric current of the reflection liquid tension size that measure this moment, change through A-D, MICROCOMPUTER PROCESSING, numeral demonstrates the tension value of fluid to be measured, but the self-correcting of the utility model full dose, zero clearing, platform automatic lifting also have stop means up and down, have simple to operate, degree of accuracy is high, good reproducibility and measure advantage fast.
Description of drawings
Fig. 1 is an example structure synoptic diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model, it is a kind of automated fluid surface tension detector, comprise that one adopts the electronic balance 100 (replacing existing force sensor) that the electromagnetic force equilibrium principle makes and has the automatic oscilaltion mechanism 200 of a platform 4, both contact by the liquid level in the vessel 5 of the carrying liquid of storing on the platform 4 of the platinum test board 7 that hangs under the electronic balance crossbeam load-bearing end and automatic oscilaltion mechanism.
Electronic balance 100 can adopt conventional products, usually structure as shown in Figure 1, crossbeam 9 is supported by parallelogram reed 8, anti-dazzling screen 11 and coil former 20 are fixed on the crossbeam 9, platinum test board 7 hangs over below the load-bearing end that is supported by reed 8.Its electromagnetic force feedback mechanism is made up of magnet steel 16, magnetic pole 17, coil 18,19 in magnetic jar.Carry out simulated photoelectric signals collecting and processing by luminotron 10, anti-dazzling screen 11, photoelectric cell 12, signal amplifier device 13, PID (proportional integral derivative) regulator 14 and driver 15, and carry out the numeral demonstration by A/D (mould/number) conversion, microprocessor, display.
Automatically oscilaltion mechanism 200 can adopt structure shown in Figure 1; comprise motor 1, two conical gear 2, screw rod 3, platform 4 up and down; and platform moved up and down carry out spacing structure; this structure by be fixed on spacing screw rod 21 on the motor 1, sliding nut 22, two microswitches 23 are formed protection motor and platform operate as normal.
Principle of work of the present utility model is: referring to Fig. 1, drive conical gear 2 by motor 1, after screw rod 3 is rotated, platform 4 upward movements, the fluid to be measured 6 that drive is placed in the vessel 5 on the platform also rises, behind the liquid level contact platinum boatswain chair 7, the automatic stop motion of motor (fluid to be measured also stops to rise), but because the effect of surface tension of liquid, make crossbeam 9 deflections of reed 8 as fulcrum, the displacement that is fixed on the anti-dazzling screen 11 in the displacement detector on the crossbeam has changed luminotron 10 and has impinged upon illumination on the photoelectric cell 12, make photronic output signal produce variation, through amplifier 13, PID regulator 14, the electric current of driver 15 outputs flows through by magnet steel 16, magnetic pole 17, coil 18 (coil former 20 is fixed on the crossbeam 9) in the permanent magnetic field that magnetic jar 19 is formed, coil will produce one with flow through the directly proportional electro-magnetic feedback power of electric current F, make crossbeam 9 pendulum get back to original equilibrium position.Illumination intensity signal on the photoelectric cell returns to the size when initial.The electric current that flows through coil carries out showing after A/D conversion, the MICROCOMPUTER PROCESSING through sample resistance on liquid crystal display numeral is the surface tension of fluid to be measured.
The force sensor of the utility model automated fluid surface (interface) detector adopts electronic balance, forms a closed loop circuit, and its theory is to measure to flow through the power F that permanent field coil electric current produces
F＝KBLI
K is magnetic field shape and the relevant coefficient of arm of force length in the formula, and B is the magnetic field intensity of permanent-magnet steel, and L is the conductor length vertical with magnetic direction, K, and B, L can be considered constant, and I is the electric current that flows through in the lead, and the big I of measuring electric current I obtains the size of electromagnetic force.
Can obtain the platinum plate contacts back liquid with liquid level tension force size through converting.
The utility model changes electronic balance into by the force sensor that will have automated fluid surface tension detector, not only makes the tension force detector easy to operate, is convenient to the zero-bit adjustment, and gamut (full scale) is guaranteed the correctness of test value from normal moveout correction.
Claims (3)
1. automated fluid surface tension detector, comprise automatic oscilaltion mechanism and force sensor, it is characterized in that: described force sensor is an electronic balance that adopts the electromagnetic force equilibrium principle to make, and the liquid level in the liquid vessel of putting in the test board that hangs under the crossbeam load-bearing end by this electronic balance and the described automatic oscilaltion mechanism contacts and carries out the tension force detection.
2. automated fluid surface tension detector according to claim 1 is characterized in that: the signal output part of described electronic balance also connects A/D conversion circuit, microprocessor and display in regular turn.
3. automated fluid surface tension detector according to claim 1 and 2, it is characterized in that: two conical gear, screw rod that moves up and down and the platform of fixedlying connected that described automatic oscilaltion mechanism comprises motor, is connected with this drive of motor with this screw rod, and platform moved up and down carry out spacing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520039453 CN2788178Y (en) | 2005-02-02 | 2005-02-02 | Automatic liquid interfacial tension detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520039453 CN2788178Y (en) | 2005-02-02 | 2005-02-02 | Automatic liquid interfacial tension detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2788178Y true CN2788178Y (en) | 2006-06-14 |
Family
ID=36786473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520039453 Expired - Lifetime CN2788178Y (en) | 2005-02-02 | 2005-02-02 | Automatic liquid interfacial tension detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2788178Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114594023A (en) * | 2022-05-10 | 2022-06-07 | 南京相科数码有限公司 | Ink detection surface tension measuring device for digital printing |
-
2005
- 2005-02-02 CN CN 200520039453 patent/CN2788178Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114594023A (en) * | 2022-05-10 | 2022-06-07 | 南京相科数码有限公司 | Ink detection surface tension measuring device for digital printing |
| CN114594023B (en) * | 2022-05-10 | 2022-09-09 | 上海丰溢复合纸材有限公司 | Ink detection surface tension measuring device for digital printing |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150202 Granted publication date: 20060614 |