CN207408493U

CN207408493U - The equipment for quantitatively probing into parallel plate capacitor capacity

Info

Publication number: CN207408493U
Application number: CN201721584821.XU
Authority: CN
Inventors: 曹雨晴
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2018-05-25
Anticipated expiration: 2027-11-23

Abstract

The utility model belongs to capacitance measurement technique field, the equipment more particularly, to parallel plate capacitor capacity is quantitatively probed into；It is fixed with several grid items on the left and right inside of the U-shaped insulating support, the spacing between adjacent gate glazing bar is 10mm, and the spacing of bottom grid item and U-shaped insulating support bottom is 20mm；A pair of of capacitor board is plugged between the grid item, the edge of the capacitor board is connected by carrying the conductive clamp of connecting line with digital multimeter；It uses the detection device of parallel-plate structure, realizes that quantifying for capacitance is probed into, and the relation of vivid demonstration the distance between capacitance and intermediate medium, capacitor board and capacity area enables student to fully understand the relation between capacitance and each parameter.

Description

The equipment for quantitatively probing into parallel plate capacitor capacity

Technical field

The utility model belongs to capacitance measurement technique field, more particularly, to quantitatively probing into setting for parallel plate capacitor capacity It is standby.

Background technology

With the continuous development of electronic technology, electronic equipment is also higher and higher to the required precision of its internal element, therefore Some electronic components are before use, it is often necessary to which its parameter is measured.Capacitance has storage in circuit as passive device The effects that, filtering, decoupling, in many electronic products, capacitance is all essential electronic component, and the capacity of capacitance is table Show the ability of capacitance stored electric energy size, be an important parameter of capacity cell, in traditional teaching capacitance detection What is used is all to become qualitative to probe into, and there are large errors, cause capacitance detection inaccuracy of imparting knowledge to students.

Utility model content

The purpose of this utility model is that the defects of for the prior art and deficiency, provide a kind of simple in structure, design conjunction Reason, the equipment easy to use for quantitatively probing into parallel plate capacitor capacity, it uses the detection device of parallel-plate structure, realizes capacitance Quantifying for capacity is probed into, the distance between vivid demonstration capacitance and intermediate medium, capacitor board and capacity area Relation, student is enable to fully understand the relation between capacitance and each parameter.

To achieve the above object, the technical solution adopted in the utility model is：It quantitatively probes into equipment and includes U-shaped insulation branch Frame, grid item, capacitor board, conductive clamp, digital multimeter；It is fixed on the left and right inside of the U-shaped insulating support several Grid item, the spacing between adjacent gate glazing bar is 10mm, and bottom grid item and the spacing of U-shaped insulating support bottom are 20mm；It is plugged with a pair of of capacitor board between the grid item, the edge of the capacitor board is by carrying the conduction of connecting line Clip is connected with digital multimeter.

Its method of probing into is：The conducting wire of Band clamp is inserted into digital multimeter Cx slots, range selects 2nF（Nanofarad）, 1nF=1 × 10^-9F.During experiment, two layers of plane-parallel capacitor insertion insulating support, plane-parallel capacitor is clamped respectively with clip Two edges, open digital multimeter, directly read capacitance values, become qualitative and probes into quantitatively to probe into；

01st, when to probe into capacitance C related with the dielectric being inserted between pole plate, maximum a pair of parallel metallic plate is inserted into stent Bottom two layers, distance between plates 2cm, keep facing area constant, measure respectively air dielectric, glass medium, gypsum media, The capacitance of ceramic dielectric simultaneously records data, compares several common dielectric constants, and student can clearly understand parallel plate capacitor Device capacitance size is related with the dielectric being inserted between pole plate, and dielectric dielectric constant is bigger, and capacitance is bigger；

02nd, the relation of capacitance C and distance between plates d are probed into, takes a pair of parallel metallic plate insertion insulating support lower two layers, structure Make plane-parallel capacitor, distance between plates 2cm keeps air dielectric constant with facing area, be sequentially increased distance between plates be 3cm, 4cm, 5cm ... are simultaneously measured, are recorded corresponding capacitance data, and data are shown, with the increase of distance between plates, capacitance reduces；Separately Outside, C-1/d images and fitting a straight line can be made using data, find the linear relationship of C and 1/d；Straight line is plotted not over seat Origin is marked, is due to leading the influence of line capacitance, if cutting this partition capacitance value（Input 0.005nF is carried out in " error " It corrects）, the image after fitting a straight line can reflect the proportional relation of C and 1/d well in the range of error permission, that is, Capacitance is inversely proportional with distance between plates d；

03rd, the relation between capacitance C and facing area S is probed into, four pairs of metallic plate areas count relation at double, take area minimum Two pieces of metallic plates, area is set to S, is inserted into two adjacent grids, distance between plates 1cm, medium is air, measures and records Capacitance values are replaced and measure the capacitance in the case of 2S, 3S, 4S successively, and data reflect that area doubles, and capacitance doubles；Make C-S Image, fitting a straight line eliminate error, and image is with regard to that can reflect the proportional relation of C-S！

More than experimental data shows, in the range of error permission, the capacitance of plane-parallel capacitor and distance between plates are into anti- Than directly proportional to facing area, the dielectric being inserted between pole plate is related, and is positive correlation with dielectric constant.

With the above structure, the utility model has the beneficial effect that：It is described in the utility model quantitatively to probe into parallel-plate electricity Hold the equipment of capacity, it uses the detection device of parallel-plate structure, realizes that quantifying for capacitance is probed into, vivid demonstration The relation of the distance between capacitance and intermediate medium, capacitor board and capacity area, enables student to fully understand capacitance With the relation between each parameter.

Description of the drawings

It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is the structure diagram of the utility model.

Reference sign：

U-shaped insulating support 1, grid item 2, capacitor board 3, conductive clamp 4, digital multimeter 5.

Specific embodiment

Below in conjunction with the accompanying drawings, the utility model is further described.

Referring to as shown in Figure 1, present embodiment adopts the following technical scheme that：It quantitatively probes into equipment and includes U-shaped insulation Stent 1, grid item 2, capacitor board 3, conductive clamp 4, digital multimeter 5；It is solid on the left and right inside of the U-shaped insulating support 1 Surely there are several grid items 2, the spacing between adjacent gate glazing bar 2 is 10mm, and bottom grid item 2 and U-shaped 1 bottom of insulating support Spacing be 20mm；A pair of of capacitor board 3 is plugged between the grid item 2, the edge of the capacitor board 3 passes through the company of carrying The conductive clamp 4 of wiring is connected with digital multimeter 5.

Quantitatively probe into the preparation of parallel plate capacitor capacity test instrument：

001st, with capacitance measurement function（Cx jacks）Digital multimeter, and be equipped with one end with clip conducting wire；

002nd, circular plane-parallel capacitor is changed to four groups of paired rectangular parallel metallic plate, and the proportional variation of area divides It Wei not S, 2S, 3S, 4S；

003rd, dielectric-slab is using the glass plate easily obtained in life, plasterboard, each one of ceramic wafer, specification about 30cm ×40cm；

004th, insulating support is made by oneself, length and width high standard about 40cm × 30cm × 12cm, width is can easily be inserted into Jie Subject to scutum, madial wall pastes grid item, and top edge equidistantly arranges, at intervals of 1cm, bottom and first grid item at intervals of 2cm, to facilitate insertion, replace dielectric-slab, the entire for example same drawer of stent appearance.

The method of probing into of present embodiment is：The conducting wire of Band clamp is inserted into digital multimeter Cx slots, range choosing Use 2nF（Nanofarad）, 1nF=1 × 10^-9F；During experiment, two layers of plane-parallel capacitor insertion insulating support, clamped respectively with clip Digital multimeter is opened at two edges of plane-parallel capacitor, directly reads capacitance values, is become qualitative and is probed into quantitatively to probe into；

01st, when to probe into capacitance C related with the dielectric being inserted between pole plate, maximum a pair of parallel metallic plate is inserted into stent Bottom two layers, distance between plates 2cm, keep facing area constant, measure respectively air dielectric, glass medium, gypsum media, The capacitance of ceramic dielectric simultaneously records data (referring to table one), compares several common dielectric constants, and student can clearly understand Plane-parallel capacitor capacitance size is related with the dielectric being inserted between pole plate, and dielectric dielectric constant is bigger, and capacitance is bigger；

02nd, the relation of capacitance C and distance between plates d are probed into, takes a pair of parallel metallic plate insertion insulating support lower two layers, structure Make plane-parallel capacitor, distance between plates 2cm keeps air dielectric constant with facing area, be sequentially increased distance between plates be 3cm, 4cm, 5cm ... are simultaneously measured, are recorded corresponding capacitance data, and data are shown, with the increase of distance between plates, capacitance reduces (ginseng See chart two)；Furthermore it is possible to make C-1/d images and fitting a straight line using data, the linear relationship of C and 1/d is found；It plots straight Line is due to leading the influence of line capacitance, if cutting this partition capacitance value not over coordinate origin（Referring to chart three, Input 0.005nF is modified in " error "）, the image after fitting a straight line can well reflect in the range of error permission The proportional relation of C and 1/d, that is, capacitance are inversely proportional with distance between plates d；

03rd, the relation between capacitance C and facing area S is probed into, four pairs of metallic plate areas count relation at double, take area minimum Two pieces of metallic plates, area is set to S, is inserted into two adjacent grids, distance between plates 1cm, medium is air, measures and records Capacitance values are replaced and measure the capacitance in the case of 2S, 3S, 4S successively, and data reflect that area doubles, and capacitance doubles；(referring to Chart four) make C-S images, fitting a straight line eliminates error, and image is with regard to that can reflect the proportional relation of C-S.

With the above structure, present embodiment has the beneficial effect that：It uses the detection device of parallel-plate structure, real Existing quantifying for capacitance is probed into, the distance between vivid demonstration capacitance and intermediate medium, capacitor board and electricity Hold the relation of area, student is enable to fully understand the relation between capacitance and each parameter.

Table one：Each dielectric lower measured capacitance

Medium	Air	Glass	Gypsum	Ceramics
					Capacitance	0.068	0.081	0.107	0.133

Table two：The relation coordinate diagram of C and 1/d

Table three：The proportional relation coordinate diagram of C and 1/d after error correction

Table four：The relation coordinate diagram of C-S

。

Claims

1. quantitatively probe into the equipment of parallel plate capacitor capacity, it is characterised in that：It include U-shaped insulating support (1), grid item (2), Capacitor board (3), conductive clamp (4), digital multimeter (5)；Number is fixed on the left and right inside of the U-shaped insulating support (1) A grid item (2), the spacing between adjacent gate glazing bar (2) are 10mm, and bottom grid item (2) and U-shaped insulating support (1) bottom The spacing in portion is 20mm；A pair of of capacitor board (3) is plugged between the grid item (2), the edge of the capacitor board (3) leads to The conductive clamp (4) with connecting line is crossed to be connected with digital multimeter (5).