CN202471826U - Multifunctional digital electric power instrument of current signal sampling - Google Patents
Multifunctional digital electric power instrument of current signal sampling Download PDFInfo
- Publication number
- CN202471826U CN202471826U CN2012200249595U CN201220024959U CN202471826U CN 202471826 U CN202471826 U CN 202471826U CN 2012200249595 U CN2012200249595 U CN 2012200249595U CN 201220024959 U CN201220024959 U CN 201220024959U CN 202471826 U CN202471826 U CN 202471826U
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- Prior art keywords
- digital electric
- multifunctional digital
- current signal
- signal sampling
- circuit
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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 multifunctional digital electric power instrument of current signal sampling. The instrument includes an alloy resistor (1), a signal amplification circuit (2), an A/D conversion circuit (3) and a single-chip microcomputer (4). The alloy resistor (1), the signal amplification circuit (2) and the A/D conversion circuit (3) are connected in series and then are connected to the single-chip microcomputer (4). A display circuit (5) is also connected on the single-chip microcomputer (4). The multifunctional digital electric power instrument of current signal sampling has the advantage of low cost.
Description
Technical field
The utility model relates to a kind of multifunctional digital electric instrument of current signal sampling, belongs to the power measure meters technical field.
Background technology
At present; In the electric instrument field, how externally suit one current transformer comes the voltage of external circuit is detected on the electric current input circuit, owing to must be equipped with current transformer (as shown in Figure 2); Increased the production cost of whole instrument; Especially for some economy electric instruments, often receive the control of cost and the correspondent voltage testing circuit can't be installed, cause the parameters of electric power monitoring comprehensive inadequately.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of multifunctional digital electric instrument of low cost current sample of signal with low cost is provided.
The purpose of the utility model is achieved in that a kind of multifunctional digital electric instrument of current signal sampling; Said instrument includes resistance alloys, signal amplification circuit, A/D change-over circuit and single-chip microcomputer, and single-chip microcomputer is inserted in said resistance alloys, signal amplification circuit and A/D change-over circuit series connection back.
The multifunctional digital electric instrument of the utility model current signal sampling also is connected with a display circuit on the said single-chip microcomputer.
The multifunctional digital electric instrument of the utility model current signal sampling, said resistance alloys is the low temperature drift alloy.
Compared with prior art, the beneficial effect of the utility model is:
The utility model adopts resistance alloys as detecting element, and is with low cost, thereby can be widely used on the economy multifunctional digital electric instrument.
Description of drawings
Fig. 1 is the circuit block diagram of the multifunctional digital electric instrument of the utility model current signal sampling.
Fig. 2 is the circuit block diagram of conventional multifunctional digital electric instrument.
Wherein: resistance alloys 1, signal amplification circuit 2, A/D change-over circuit 3, single-chip microcomputer 4, display circuit 5.
Embodiment
Referring to Fig. 1; The multifunctional digital electric instrument of a kind of current signal sampling that the utility model relates to; Said instrument includes resistance alloys 1, signal amplification circuit 2, A/D change-over circuit 3 and single-chip microcomputer 4; Single-chip microcomputers 4 are inserted in said resistance alloys 1, signal amplification circuit 2 and A/D change-over circuit 3 series connection backs, and said resistance alloys 1 has the low temperature drift characteristic, also are connected with a display circuit 5 on the said single-chip microcomputer 4.
During use, resistance alloys 1 is inserted the foreign current incoming line, the signal that resistance alloys 1 records amplifies after by A/D change-over circuit 3 input single-chip microcomputers 4 through signal amplification circuit 2, and can show through display circuit 5.
Claims (2)
1. the multifunctional digital electric instrument of current signal sampling; It is characterized in that: said instrument includes resistance alloys (1), signal amplification circuit (2), A/D change-over circuit (3) and single-chip microcomputer (4), and single-chip microcomputer (4) is inserted in said resistance alloys (1), signal amplification circuit (2) and A/D change-over circuit (3) series connection back.
2. a kind of according to claim 1 multifunctional digital electric instrument of current signal sampling is characterized in that: also be connected with a display circuit (5) on the said single-chip microcomputer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200249595U CN202471826U (en) | 2012-01-19 | 2012-01-19 | Multifunctional digital electric power instrument of current signal sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200249595U CN202471826U (en) | 2012-01-19 | 2012-01-19 | Multifunctional digital electric power instrument of current signal sampling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471826U true CN202471826U (en) | 2012-10-03 |
Family
ID=46919978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200249595U Expired - Fee Related CN202471826U (en) | 2012-01-19 | 2012-01-19 | Multifunctional digital electric power instrument of current signal sampling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202471826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020345A (en) * | 2014-06-23 | 2014-09-03 | 湖南大学 | Novel audion reverse saturation current tester |
-
2012
- 2012-01-19 CN CN2012200249595U patent/CN202471826U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020345A (en) * | 2014-06-23 | 2014-09-03 | 湖南大学 | Novel audion reverse saturation current tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20150119 |
|
| EXPY | Termination of patent right or utility model |