CN104316756A - Digital voltage meter - Google Patents
Digital voltage meter Download PDFInfo
- Publication number
- CN104316756A CN104316756A CN201410530306.8A CN201410530306A CN104316756A CN 104316756 A CN104316756 A CN 104316756A CN 201410530306 A CN201410530306 A CN 201410530306A CN 104316756 A CN104316756 A CN 104316756A
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- circuit
- digital voltmeter
- control circuit
- change
- over circuit
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Abstract
The invention discloses a digital voltage meter, and belongs to the field of electronic measurement devices. the digital voltage meter comprises an automatic gear switching circuit, an A/D conversion circuit, a display circuit, a control circuit and a peripheral circuit, and is characterized in that the automatic gear switching circuit is connected with the control circuit via the A/D conversion circuit; the display circuit and the peripheral circuit are both connected with the control circuit; the peripheral circuit comprises a clock circuit and a reset circuit; and the control circuit adopts a single chip microcomputer. As the voltage meter is digital, the control module has automatic range switching and displaying functions, the number of elements used by design of the entire hardware circuit is reduced, adjustment is convenient, the performance of the entire system is more stable, and the digital voltage meter of the invention is simple in operation, high in cost performance and strong in applicability.
Description
Technical field
The invention belongs to electronic measuring device field, particularly relate to a kind of digital voltmeter.
Background technology
Along with the continuous progress of science and technology, the use of electronic equipment gets more and more, and plays important effect in daily life.Frequent especially for the use of voltage table in the production, later period maintenance process of electronic equipment, voltage table also becomes the important tool in electronic product life cycle.Digital voltmeter is called for short DVM, is to adopt Digital Measuring Technique, and continuous print analog quantity is converted to the digital form of discontinuous, off-line and the instrument shown.Traditional analogue instrument reading error is comparatively large, measurement range is little and do not have the shortcomings such as Function Extension.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of digital voltmeter.
A kind of digital voltmeter of the present invention, comprises gear automatic switch-over circuit, A/D change-over circuit, display circuit, control circuit and peripheral circuit, it is characterized in that described gear automatic switch-over circuit is connected with control circuit by A/D change-over circuit; Display circuit is all connected with control circuit with peripheral circuit; Wherein peripheral circuit comprises clock circuit and reset circuit; Control circuit adopts single-chip microcomputer.
A kind of digital voltmeter of the present invention, is characterized in that the single-chip microcomputer of described control circuit is AT89C51.
A kind of digital voltmeter of the present invention, is characterized in that described gear automatic switch-over circuit is provided with four gears, is respectively 2.5V, 5.0V, 10.0V and 20.0V tetra-gears.
A kind of digital voltmeter of the present invention, is characterized in that described A/D change-over circuit adopts 8 successive approximation A/D converters of ADC0809, is provided with 8 analog input channels.
A kind of digital voltmeter of the present invention, is characterized in that the Starting mode of described A/D change-over circuit is pulse signal starting.
A kind of digital voltmeter of the present invention, is characterized in that the Adjustable Error of described A/D is ± 1LSB.
A kind of digital voltmeter of the present invention, is characterized in that described display circuit comprises the Parallel I/O mouth composition of common cathode LED seven-segment numeric indicator and single-chip microcomputer.
A kind of digital voltmeter of the present invention, numeral is adopted to make control module, there is automatic range switching and Presentation Function, the number of elements not only making the design of whole hardware circuit use reduces, and regulate also more for convenience, whole decorum performance is also more stable, and digital voltmeter of the present invention is simple to operate, cost performance is high, has stronger applicability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
A kind of digital voltmeter of the present invention, comprises gear automatic switch-over circuit, A/D change-over circuit, display circuit, control circuit and peripheral circuit, it is characterized in that described gear automatic switch-over circuit is connected with control circuit by A/D change-over circuit; Display circuit is all connected with control circuit with peripheral circuit; Wherein peripheral circuit comprises clock circuit and reset circuit; Control circuit adopts single-chip microcomputer.
A kind of digital voltmeter of the present invention, the single-chip microcomputer of described control circuit is AT89C51.Described gear automatic switch-over circuit is provided with four gears, is respectively 2.5V, 5.0V, 10.0V and 20.0V tetra-gears.Described A/D change-over circuit adopts 8 successive approximation A/D converters of ADC0809, A/D change-over circuit mainly utilizes ADC0809 to be connected with single-chip microcomputer, sequential chart according to ADC0809 starts A/D change-over circuit by the mode of software programming, realize A/D translation function, be provided with 8 analog input channels, there is channel address decoding latch, export band three-state data latch.The Starting mode of described A/D change-over circuit is pulse signal starting.The Adjustable Error of described A/D is ± 1LSB.Described display circuit comprises the Parallel I of common cathode LED seven-segment numeric indicator and single-chip microcomputer/O mouth composition, the P2 mouth of single-chip microcomputer as segment encode output port, low four bit code Strobe terminal as nixie display of P1 mouth.
Claims (7)
1. a digital voltmeter, comprises gear automatic switch-over circuit, A/D change-over circuit, display circuit, control circuit and peripheral circuit, it is characterized in that described gear automatic switch-over circuit is connected with control circuit by A/D change-over circuit; Display circuit is all connected with control circuit with peripheral circuit; Wherein peripheral circuit comprises clock circuit and reset circuit; Control circuit adopts single-chip microcomputer.
2. a kind of digital voltmeter as claimed in claim 1, is characterized in that the single-chip microcomputer of described control circuit is AT89C51.
3. a kind of digital voltmeter as claimed in claim 1, is characterized in that described gear automatic switch-over circuit is provided with four gears, is respectively 2.5V, 5.0V, 10.0V and 20.0V tetra-gears.
4. a kind of digital voltmeter as claimed in claim 1, is characterized in that described A/D change-over circuit adopts 8 successive approximation A/D converters of ADC0809, is provided with 8 analog input channels.
5. a kind of digital voltmeter as described in claim 1 or 4, is characterized in that the Starting mode of described A/D change-over circuit is pulse signal starting.
6. a kind of digital voltmeter as claimed in claim 1, is characterized in that the Adjustable Error of described A/D is ± 1LSB.
7. a kind of digital voltmeter as claimed in claim 1, is characterized in that described display circuit comprises the Parallel I/O mouth composition of common cathode LED seven-segment numeric indicator and single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410530306.8A CN104316756A (en) | 2014-10-10 | 2014-10-10 | Digital voltage meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410530306.8A CN104316756A (en) | 2014-10-10 | 2014-10-10 | Digital voltage meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104316756A true CN104316756A (en) | 2015-01-28 |
Family
ID=52372009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410530306.8A Pending CN104316756A (en) | 2014-10-10 | 2014-10-10 | Digital voltage meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104316756A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759112A (en) * | 2016-05-24 | 2016-07-13 | 南宁市茂百科技有限公司 | Digital voltage meter achieving automatic range switching |
| CN106093546A (en) * | 2016-07-27 | 2016-11-09 | 江南大学 | A kind of Measurement of Micro Current |
| CN106338639A (en) * | 2015-07-06 | 2017-01-18 | 河北工业大学 | Pulse peak voltage measurement and display device |
-
2014
- 2014-10-10 CN CN201410530306.8A patent/CN104316756A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338639A (en) * | 2015-07-06 | 2017-01-18 | 河北工业大学 | Pulse peak voltage measurement and display device |
| CN105759112A (en) * | 2016-05-24 | 2016-07-13 | 南宁市茂百科技有限公司 | Digital voltage meter achieving automatic range switching |
| CN106093546A (en) * | 2016-07-27 | 2016-11-09 | 江南大学 | A kind of Measurement of Micro Current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |