CN1477377A - Balancing magnetic weighing instrument - Google Patents
Balancing magnetic weighing instrument Download PDFInfo
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- CN1477377A CN1477377A CNA021365954A CN02136595A CN1477377A CN 1477377 A CN1477377 A CN 1477377A CN A021365954 A CNA021365954 A CN A021365954A CN 02136595 A CN02136595 A CN 02136595A CN 1477377 A CN1477377 A CN 1477377A
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- China
- Prior art keywords
- deformation
- flexible member
- weighing instrument
- electromagnetic force
- balancing magnetic
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Abstract
The present invention relates to a balance magnetized weighing instrument for displaying weight of body by utilizing current of balance magnetized electromagnetic force. In its structure it utilizes light to detect the deformation of the elastic element, and the detected photoelectric signal is amplified to produce electromagnetic force to resist the deformation of the elastic element, and the intensity of the current of the electromagnetic force can be used for representing the weight of body, so that its weighing speed is quick and weighing result is accurate.
Description
Technical field
The present invention relates to a kind of weighing apparatus, especially a kind ofly be subjected to the deformation of the flexible member of magnetic to come the projection electronic weighing instrument of the weight of Measuring Object with balance.
Background technology
The projection electronic weighing instrument of prior art, its ultimate principle all are to utilize the deformation of flexible member to come the weight of Measuring Object.The object of Different Weight, flexible member produces deformation in various degree, changes into electric signal by voltage dependent resistor (VDR) and shows weight of object.This projection electronic weighing instrument shortcoming is; The deformation of elastic components scope is big, and between the 1g to 10kg, the deformation range of flexible member is 10,000 times as the weighing scope.100,000 times of interior flexible members of deformation range can't guarantee that it has strict linearity in so broad scope, certainly will influence the degree of accuracy of weighing.Also there are mechanical fatigue in flexible member and piezoresistive pickup, make the linear compensation of complete machine can not be topped, thereby influence weighing precision.And, the appearance of correct reading is postponed because the impulsive force when putting into weight and the bounce of flexible member can cause the attenuation type vibration of flexible member.
Summary of the invention
The purpose of this invention is to provide the projection electronic weighing instrument that a kind of electromagnetic force of utilizing balance to be subjected to magnetic shows weight of object.
Projection electronic weighing instrument of the present invention detects the deformation of flexible member with light activated element, again detected photosignal is produced electromagnetic force after amplifying, go to resist the deformation of elastic element, then the current conversion that produces electromagnetic force is become voltage, show the weight of object by display.The flexible member that projection electronic weighing instrument of the present invention is adopted is rectangle, and its vertical both sides are thick, and horizontal both sides are thin, forms the use in parallel of two flexure strips.
Because the present invention utilizes balance to be subjected to the electromagnetic force of magnetic to show weight of heavy, makes the deformation range of flexible member dwindle tens thousand of times, and does not have mechanical fatigue and transducer zeroing creep, temperature and air pressure change can not influence the precision of weighing.Because correct reading reflection is fast, has shortened the time of weighing, and is applicable to the operation of streamline rapid weighing.
Description of drawings
Fig. 1 is the structural drawing that balance is subjected to the projection electronic weighing instrument of the sub-weighing apparatus of magnetoelectricity.
Fig. 2 is the projection electronic weighing instrument M-M sectional view that balance is subjected to the sub-weighing apparatus of magnetoelectricity.
Fig. 3 is the projection electronic weighing instrument N-N sectional view that balance is subjected to the sub-weighing apparatus of magnetoelectricity.
Fig. 4 is the circuit diagram that balance is subjected to the projection electronic weighing instrument of the sub-weighing apparatus of magnetoelectricity.
Embodiment
The scale pan 1 among Fig. 1 flexibly connects with fixed mount 2 usefulness nuts and screw, and light barrier 4 is screwed with fixed mount 2 and is connected, and magnetic piece 9 is made for permeability magnetic material, and is mutually bonding with fixed mount 2 usefulness seccotines.Elastic component 10 is made oblong-shaped with metallic copper, and its both sides are thick, are up and down thin slice, and to form the elasticity of trace, its both sides are screwed with shell 3 with fixed mount 2 respectively and are connected.E type magnetic core 7 is mutually bonding with shell 3 usefulness seccotines.Optical transmitting set 5 is connected with shell 3 with the suitable method of optical receiving set 6 usefulness.Coil bag 8 usefulness seccotines and E type magnetic core 7 are fixedly connected.Optical transmitting set 5 and optical receiver 6 installation sites should meet: a: when not placing any weight on the scale pan, the internal resistance that the light quantity of optical transmitting set 6 by light barrier 4 can make optical receiver 5 be produced equates; B: when placing atomic little material on the scale pan, because of the sinking of light barrier 4, optical receiver 6 received light quantities are reduced and internal resistance increases, the received light quantity that makes optical receiver 6 simultaneously increases and internal resistance reduces.This changes the input signal of control circuit board 11, and it makes control circuit board 11 increase the electric current that is transported on the coil bag 8 after amplifying, and the electromagnetic force that E type magnetic core 7 is increased equals the ampere turns of coil.Because the number of turn of coil immobilizes, so be directly proportional with weight in the scale pan by the electric current of coil.Again this electric current by the resistor R in the control circuit board
13Change into voltage, be transported to and remove to demonstrate voltage in the voltage display, this voltage is then corresponding to the weight of alleged object.In Fig. 4 projection electronic weighing instrument electricity principle sketch, optical transmitting set 5 and optical receiver 6 are as if the employing same model, with the element of performance, and the variation of then any temperature and air pressure can not make the zero-bit generation creep of circuit.Resist the deformation of elastic component 10 because of the projection electronic weighing instrument utilizes electromagnetic force,, thereby guarantee that measuring accuracy is accurate so elastic component 10 can not produce mechanical fatigue.Because the resistance to deformation electromagnetic force is to produce with the speed of photoelectricity, so can weigh at a terrific speed and show weight.The cost that this balance is subjected to the sub-weighing apparatus of magnetoelectricity is low than the projection electronic weighing instrument of other types.
Claims (3)
1. a balancing magnetic weighing instrument is made up of light sensor, flexible member and control circuit, it is characterized in that: detect the deformation of flexible member with photoelectric sensor, the deformation that the electromagnetic force that the electric signal that detects deformation is produced after amplifying is resisted flexible member.
2. balancing magnetic weighing instrument according to claim 1 is characterized in that: make the rectangle flexible member with copper material and support pan of a steelyard, its both sides are thick, and both sides are thin slice up and down, form two in parallel uses of micro-flexure strip.
3. balancing magnetic weighing instrument according to claim 2 is characterized in that: select same model for use, make light activated element with the optical transmitting set and the optical receiver of performance, eliminate the zero drift of control circuit; During assembling, regulate the installation site of optical transmitting set and optical receiver, resist the deformation of flexible member with anti-deformation electromagnetic force, and make the linear ratio of this electric signal and alleged weight of object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021365954A CN1477377A (en) | 2002-08-21 | 2002-08-21 | Balancing magnetic weighing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021365954A CN1477377A (en) | 2002-08-21 | 2002-08-21 | Balancing magnetic weighing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1477377A true CN1477377A (en) | 2004-02-25 |
Family
ID=34146561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021365954A Pending CN1477377A (en) | 2002-08-21 | 2002-08-21 | Balancing magnetic weighing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1477377A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175595A (en) * | 2011-12-22 | 2013-06-26 | 梅特勒-托利多公开股份有限公司 | Weighing cell operating on the principle of electromagnetic force compensation with optoelectronic position sensor |
| CN110307886A (en) * | 2019-07-16 | 2019-10-08 | 深圳市杰曼科技股份有限公司 | A kind of big tare weight Weight detecting device and its detection method based on electromagnetic force |
-
2002
- 2002-08-21 CN CNA021365954A patent/CN1477377A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175595A (en) * | 2011-12-22 | 2013-06-26 | 梅特勒-托利多公开股份有限公司 | Weighing cell operating on the principle of electromagnetic force compensation with optoelectronic position sensor |
| CN103175595B (en) * | 2011-12-22 | 2017-03-01 | 梅特勒-托利多公开股份有限公司 | There is the weighing unit of photoelectrical position sensor based on electromagnetic force compensation principle |
| CN110307886A (en) * | 2019-07-16 | 2019-10-08 | 深圳市杰曼科技股份有限公司 | A kind of big tare weight Weight detecting device and its detection method based on electromagnetic force |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |