CN202676828U - Device for testing volt-ampere characteristics of electrical element - Google Patents
Device for testing volt-ampere characteristics of electrical element Download PDFInfo
- Publication number
- CN202676828U CN202676828U CN 201220302548 CN201220302548U CN202676828U CN 202676828 U CN202676828 U CN 202676828U CN 201220302548 CN201220302548 CN 201220302548 CN 201220302548 U CN201220302548 U CN 201220302548U CN 202676828 U CN202676828 U CN 202676828U
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- power supply
- throw switch
- spdt
- electricity
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Abstract
The utility model discloses a device for measuring volt-ampere characteristics of an electrical element. The device comprises a power supply, a single-pole double-throw (SPST) switch, a slide-wire rheostat, a voltmeter, a single-pole double-throw (SPDT) switch, an electrical element, an ammeter, and a variable resistor, a positive pole of the power supply is connected with a fixed contact of the SPST switch, a movable contact of the SPST switch is connected with one end of the slide-wire rheostat, and the other end the slide-wire rheostat is connected with a negative pole of the power supply; a sliding head of the slide-wire rheostat is connected with a fixed contact of the SPDT switch; one end of the electrical element is connected with a first movable contact of the SPST switch, and the other end is connected with the negative pole of the power supply; a positive end of the ammeter is connected with a second movable contact of the SPDT switch, a negative end is connected with one end of the variable resistor, the other end of the variable resistor is connected with the negative pole of the power supply; a positive end of the voltmeter is connected with the fixed contact of the SPDT switch, and a negative end is connected with the negative pole of the power supply. The device for measuring volt-ampere characteristics of an electrical element is simple in structure, practical and convenient, and is in favor of accurate measurement of volt-ampere characteristics of a diode.
Description
Technical field
The utility model relates to a kind of physics facility, is specially a kind of electricity component voltammetric characteristic measuring device.
Background technology
When the electricity component volt-ampere characteristic referred to be added in the change in voltage at electricity component two ends, how the electric current that flows through this element changed.If the two is linear, then this element is linear element, such as resistance commonly used, resistance box etc.; If the variation of the two is not linear relationship, then this element is nonlinear element, such as diode, thermistor etc.At present, voltammetry commonly used in the laboratory, by external ammeter or in fetch the volt-ampere characteristic of measuring electricity component.But owing to being subjected to the impact of ammeter resistance, measurement result is not accurate enough.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and comparatively accurately electricity component voltammetric characteristic measuring device of a kind of measurement result is provided.
To achieve these goals, the utility model is taked following technical scheme:
A kind of electricity component voltammetric characteristic measuring device, comprise power supply, single-pole single-throw switch (SPST), rheochord, voltage table, single-pole double-throw switch (SPDT), electricity component, reometer and variable resistor, the positive pole of described power supply connects the fixed contact of described single-pole single-throw switch (SPST), the moving contact of described single-pole single-throw switch (SPST) connects an end of described rheochord, the negative pole of the described power supply of another termination of described rheochord; The slide head of described rheochord links to each other with the fixed contact of described single-pole double-throw switch (SPDT) electricity; One end of described electricity component links to each other with the first moving contact of described single-pole double-throw switch (SPDT) electricity, and the other end of described electricity component links to each other with the negative electricity of described power supply; The anode of described reometer links to each other with the second moving contact electricity of described single-pole double-throw switch (SPDT), and the negative terminal of described reometer links to each other with a described variable-resistance end, the negative pole of the described power supply of described variable-resistance another termination; The fixed contact of the described single-pole double-throw switch (SPDT) of positive termination of described voltage table, the negative terminal of described voltage table connects the negative pole of described power supply.
Measuring process and principle are as follows: the first step: closed described single-pole single-throw switch (SPST), described single-pole double-throw switch (SPDT) beaten to the first moving contact make described electricity component place in circuit, regulate the slide head of described rheochord, make the reading of described voltage table reach the measuring voltage value.Second step: described single-pole double-throw switch (SPDT) is beaten to the second moving contact, regulated described variable-resistance resistance, make the reading of described voltage table identical with the reading of the first step.Flow through the electric current that flows through described electricity component in described variable-resistance electric current and the first step this moment and equate, this current value can directly read from described reometer, when having avoided measuring the electricity component branch current owing to the error that accesses reometer and caused.Write down the reading of described voltage table this moment, reometer.Repeat the measurement in above-mentioned two steps, measure one group of voltage, current value, make the volt-ampere characteristic of described electricity component with graphing method.
The utility model has overcome the deficiency of traditional electricity component voltammetric characteristic measuring owing to adopting above-mentioned design, and it is simple in structure, and is practical and convenient, is conducive to the Measurement accuracy of electricity component volt-ampere characteristic.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is circuit theory diagrams of the present utility model.
Among the figure: 1. power supply, 2. single-pole single-throw switch (SPST), 3. rheochord, 4. voltage table, 5. single-pole double-throw switch (SPDT), 6. electricity component (take diode as example), 7. reometer, 8. variable resistor.
Embodiment
As shown in Figure 1, the utility model comprises power supply 1, single-pole single-throw switch (SPST) 2, rheochord 3, voltage table 4, single-pole double-throw switch (SPDT) 5, electricity component 6, reometer 7 and variable resistor 8, the fixed contact of the anodal order monopole single throw switch 2 of power supply 1, the moving contact of single-pole single-throw switch (SPST) 2 connects an end of rheochord 3, the negative pole of another termination power 1 of rheochord 3; The slide head P of rheochord 3 links to each other with the fixed contact of single-pole double-throw switch (SPDT) 5 electricity; One end of electricity component 6 links to each other with the first moving contact a electricity of single-pole double-throw switch (SPDT) 5, and the other end links to each other with the negative electricity of power supply 1; The anode of reometer 7 links to each other with the second moving contact b electricity of single-pole double-throw switch (SPDT) 5, and negative terminal links to each other with an end of variable resistor 8, the negative pole of another termination power 1 of variable resistor 8; The fixed contact of the anode order double-pole double throw switch 5 of voltage table 4, negative terminal connects the negative pole of power supply 1.
Measuring process is as follows: the first step: closed single-pole single-throw switch (SPST) 2,5 dozens of single-pole double-throw switch (SPDT)s are made electricity component 6 places in circuit to the first moving contact a, and regulate the slide head P of rheochord 3, make the reading of voltage table 4 reach the measuring voltage value.Second step: 5 dozens of single-pole double-throw switch (SPDT)s to the second moving contact b, are regulated the resistance of variable resistor 8, make the reading of voltage table 4 identical with the reading of the first step.Write down the reading of this moment voltage table 4 and reometer 7.Repeat the measurement in above-mentioned two steps, measure one group of voltage, current value, make the volt-ampere characteristic of electricity component 6 with graphing method.
Claims (1)
1. electricity component voltammetric characteristic measuring device, it is characterized in that: comprise power supply, single-pole single-throw switch (SPST), rheochord, voltage table, single-pole double-throw switch (SPDT), electricity component, reometer and variable resistor, the positive pole of described power supply connects the fixed contact of described single-pole single-throw switch (SPST), the moving contact of described single-pole single-throw switch (SPST) connects an end of described rheochord, the negative pole of the described power supply of another termination of described rheochord; The slide head of described rheochord links to each other with the fixed contact of described single-pole double-throw switch (SPDT) electricity; One end of described electricity component links to each other with the first moving contact of described single-pole double-throw switch (SPDT) electricity, and the other end of described electricity component links to each other with the negative electricity of described power supply; The anode of described reometer links to each other with the second moving contact electricity of described single-pole double-throw switch (SPDT), and the negative terminal of described reometer links to each other with a described variable-resistance end, the negative pole of the described power supply of described variable-resistance another termination; The fixed contact of the described single-pole double-throw switch (SPDT) of positive termination of described voltage table, the negative terminal of described voltage table connects the negative pole of described power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302548 CN202676828U (en) | 2012-06-26 | 2012-06-26 | Device for testing volt-ampere characteristics of electrical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302548 CN202676828U (en) | 2012-06-26 | 2012-06-26 | Device for testing volt-ampere characteristics of electrical element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202676828U true CN202676828U (en) | 2013-01-16 |
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ID=47497725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220302548 Expired - Fee Related CN202676828U (en) | 2012-06-26 | 2012-06-26 | Device for testing volt-ampere characteristics of electrical element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202676828U (en) |
-
2012
- 2012-06-26 CN CN 201220302548 patent/CN202676828U/en not_active Expired - Fee Related
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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: 20130116 Termination date: 20130626 |