CN202230131U - Digital AC voltage current combined meter having oscilloscope interface - Google Patents
Digital AC voltage current combined meter having oscilloscope interface Download PDFInfo
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- CN202230131U CN202230131U CN2011203492673U CN201120349267U CN202230131U CN 202230131 U CN202230131 U CN 202230131U CN 2011203492673 U CN2011203492673 U CN 2011203492673U CN 201120349267 U CN201120349267 U CN 201120349267U CN 202230131 U CN202230131 U CN 202230131U
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- digital
- signal conditioning
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Abstract
The utility model relates to a digital AC voltage current combined meter having an oscilloscope interface. The digital AC voltage current combined meter of the utility model comprises a voltage sensor, a current sensor, a signal conditioning circuit, an oscilloscope interface, a one-chip microcomputer, a reset circuit, functional buttons, and LCD liquid crystal display, wherein the secondary side voltage signal of the voltage sensor and the secondary side current signal of the current sensor are respectively connected with the input terminal of the signal conditioning circuit and the oscilloscope interface; the signal conditioning circuit output terminal is connected with the self-mounted A/D input terminal of the one-chip microcomputer; the reset circuit and the functional buttons are connected with the input terminal of the one-chip microcomputer; and the output terminal of the one-chip microcomputer is connected with the input terminal of the LCD liquid crystal display. While measuring the effective value, peak value, and frequency of AC voltage and current, the digital AC voltage current combined meter can display the waveform of the voltage and current by connecting an oscilloscope via an oscilloscope interface, thereby making the experiment result more visual. The digital AC voltage current combined meter is mainly applicable to the heavy current circuit experiments and replaces the pointer type voltmeter and ammeter.
Description
Technical field:
The utility model relates to a kind of Digital AC electric current and voltage combination table, particularly a kind of Digital AC electric current and voltage combination table with the oscillograph interface.
Background technology:
At present, main use is pointer voltage table, reometer in the circuit base experiment, belongs to analogue instrument, has problems such as simple in structure, function singleness, use inconvenience.Compare with analogue instrument, digital instrument is highly sensitive, and degree of accuracy is high, clear display, and overload capacity is strong, is easy to carry, and uses simpler.
Summary of the invention:
The purpose of the utility model is exactly the above-mentioned defective that exists to prior art; A kind of Digital AC electric current and voltage combination table with the oscillograph interface is provided; Effective value, peak value, the frequency of alternating voltage, electric current can not only be measured, and the real-time waveform of tested voltage, electric current can be observed with oscillograph through the oscillograph interface.
Its technical scheme is: comprise voltage sensor, current sensor, signal conditioning circuit, oscillograph interface, single-chip microcomputer, reset circuit, function button, LCD liquid crystal display; Voltage sensor secondary side voltage signal is connected with signal conditioning circuit input end and oscillograph interface respectively with current sensor secondary side current signal; The signal conditioning circuit output terminal carries the A/D input end with single-chip microcomputer and is connected; Reset circuit, function button are connected with the input end of single-chip microcomputer, and the output terminal of single-chip microcomputer is connected with the input end of LCD liquid crystal display.
Above-mentioned single-chip microcomputer adopts C8051F120 type single-chip microcomputer.
The OCM12864 LCD MODULE is adopted in above-mentioned LCD liquid crystal display.
The beneficial effect of the utility model is: can when measuring alternating voltage, current effective value, peak value, frequency, connect oscillograph through the oscillograph interface easily, the waveform of display voltage, electric current makes experimental result more directly perceived; Be mainly used in the forceful electric power Experiment of Electrical Circuits, substitute needle dc voltmeter, reometer.
Description of drawings:
Accompanying drawing 1 is the structural representation of the utility model.
Embodiment:
In conjunction with accompanying drawing 1, the utility model is done further to describe:
As shown in Figure 1, a kind of Digital AC electric current and voltage combination table with the oscillograph interface, it comprises voltage sensor, current sensor, signal conditioning circuit, oscillograph interface, single-chip microcomputer, reset circuit, function button, LCD liquid crystal display.Voltage sensor secondary side voltage signal is connected with signal conditioning circuit input end and oscillograph interface respectively with current sensor secondary side current signal; Signal conditioning circuit is used for signal promoted with ratio to be adjusted; Make signal after the conditioning meet the permission input voltage range (0 ~ 3V) of the inner A/D of single-chip microcomputer; And the output terminal of signal conditioning circuit is provided with overvoltage crowbar, protection A/D input pin.The signal conditioning circuit output terminal carries the A/D input end with single-chip microcomputer and is connected, and reset circuit, function button are connected with the input end of single-chip microcomputer, and reset circuit is used to realize system power-on reset; The output terminal of single-chip microcomputer is connected with the input end of LCD liquid crystal display, and an OCM12864 LCD MODULE is adopted in the LCD liquid crystal display, and single-chip microcomputer adopts C8051F120 high-performance single-chip microcomputer; Through algorithm routine the signal that A/D adopts is into carried out calculation process; Obtain effective value, peak value, the frequency of virtual voltage, electric current, and, show measurement data through the LCD display unit; Can be through function button adjustment measurement parameter precision; Latch video data, the routine techniques that its physical circuit is well known to those skilled in the art no longer details.
Claims (3)
1. the Digital AC electric current and voltage combination table with the oscillograph interface is characterized in that: comprise voltage sensor, current sensor, signal conditioning circuit, oscillograph interface, single-chip microcomputer, reset circuit, function button, LCD liquid crystal display; Voltage sensor secondary side voltage signal is connected with signal conditioning circuit input end and oscillograph interface respectively with current sensor secondary side current signal; The signal conditioning circuit output terminal carries the A/D input end with single-chip microcomputer and is connected; Reset circuit, function button are connected with the input end of single-chip microcomputer, and the output terminal of single-chip microcomputer is connected with the input end of LCD liquid crystal display.
2. the Digital AC electric current and voltage combination table of band oscillograph interface according to claim 1 is characterized in that: described single-chip microcomputer adopts C8051F120 type single-chip microcomputer.
3. the Digital AC electric current and voltage combination table of band oscillograph interface according to claim 1 is characterized in that: the OCM12864 LCD MODULE is adopted in described LCD liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203492673U CN202230131U (en) | 2011-09-19 | 2011-09-19 | Digital AC voltage current combined meter having oscilloscope interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203492673U CN202230131U (en) | 2011-09-19 | 2011-09-19 | Digital AC voltage current combined meter having oscilloscope interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202230131U true CN202230131U (en) | 2012-05-23 |
Family
ID=46080715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203492673U Expired - Fee Related CN202230131U (en) | 2011-09-19 | 2011-09-19 | Digital AC voltage current combined meter having oscilloscope interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202230131U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163350A (en) * | 2013-03-26 | 2013-06-19 | 广东电网公司电力科学研究院 | Frequency-selecting universal meter for measuring voltage and current |
-
2011
- 2011-09-19 CN CN2011203492673U patent/CN202230131U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163350A (en) * | 2013-03-26 | 2013-06-19 | 广东电网公司电力科学研究院 | Frequency-selecting universal meter for measuring voltage and current |
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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: 20120523 Termination date: 20120919 |