CN201392361Y - AC/DC voltmeter and ammeter based on single chip microcomputer and optical coupler and sampling circuit - Google Patents
AC/DC voltmeter and ammeter based on single chip microcomputer and optical coupler and sampling circuit Download PDFInfo
- Publication number
- CN201392361Y CN201392361Y CN200920137741U CN200920137741U CN201392361Y CN 201392361 Y CN201392361 Y CN 201392361Y CN 200920137741 U CN200920137741 U CN 200920137741U CN 200920137741 U CN200920137741 U CN 200920137741U CN 201392361 Y CN201392361 Y CN 201392361Y
- Authority
- CN
- China
- Prior art keywords
- chip microcomputer
- resistance
- optocoupler
- power supply
- rectifier bridge
- Prior art date
- 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
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The utility model relates to an AC/DC voltmeter and ammeter based on a single chip microcomputer and an optical coupler and a sampling circuit, which comprises a rectifier bridge, a resistor, a switching power supply, an optical coupler, a single chip microcomputer and a digital display circuit. Detected voltage signals are sent to the input side of the optical coupler after being rectified through the rectifier bridge after the voltage of the detected voltage signals is reduced and the current thereof is limited by the resistor, the signals on the output side of the optical coupler are converted to the voltage signals through the resistor, the voltage signals are sent to the single chip microcomputer for being processed, and the detected values are displayed through a digital display circuit. Compared with the prior art, the circuit is simple, the single chip microcomputer and the optical coupler are mainly adopted to constitute the circuit, the process is easy, the cost is lower, the utility model can be served as a voltmeter and an ammeter after the signals are converted, and can also be served as a sampling circuit used for sampling voltage and current signal of the overall system.
Description
Technical field:
The utility model relates to a kind of alterating and direct current volt-ammeter and sample circuit based on single-chip microcomputer and optocoupler, belongs to the electrical instrument field.
Background technology:
Present various volometer and electric current and voltage detect, control circuit, generally all adopt voltage sensor and current sensor, its circuit complexity, and the cost height, area occupied is big.
The utility model content:
It is simple that the purpose of this utility model just provides a kind of circuit, and technology is convenient, and cost is lower, both can be used as voltage table after conversion of signals, can be used as reometer again, also can be as just the circuit of the signal sampling of total system.
The purpose of this utility model is to realize like this, it comprises rectifier bridge (D), resistance R 1, Switching Power Supply (B), optocoupler (A), resistance R 2, single-chip microcomputer (C), digital display circuit (E), it is characterized in that: the input end of rectifier bridge (D) is received at the two ends of tested power supply (U) respectively, the anode of rectifier bridge (D) output and an end of resistance R 1, Switching Power Supply (B) input end joins, the positive pole of the other end of resistance R 1 and optocoupler (A) input side luminotron joins, the negative pole of optocoupler (A) input side luminotron and another input end of Switching Power Supply (B), the negative terminal of rectifier bridge (D) output joins, the collector of optocoupler (A) outgoing side phototriode is received the power end of Switching Power Supply (B) output head anode and single-chip microcomputer (C), the emitter of optocoupler (A) outgoing side phototriode is received an end of resistance R 2 and the A/D mouth of single-chip microcomputer (C), the ground end of the other end of resistance R 2 and single-chip microcomputer (C), Switching Power Supply (B) negative pole of output end joins, and the input end of the delivery outlet of single-chip microcomputer (C) and digital display circuit (E) joins.
The utility model utilizes the electrical isolation and the characteristics of linearity and the ability of single-chip microcomputer signal Processing of optocoupler, realize the sampling and the measurement of tested voltage signal, tested voltage signal is sent into the optocoupler input side by resistance step-down current limliting after the rectifier bridge rectification, the current signal of optocoupler outgoing side converts voltage signal to through resistance, this voltage signal is sent into single-chip microcomputer and is handled, and shows tested magnitude of voltage through digital display circuit again.
The utility model compared with prior art circuit is simple, and technology is convenient, and cost is lower, both can be used as voltage table after conversion of signals, can be used as reometer again, also can be as just the voltage and current signal sampling of total system.
Description of drawings:
Fig. 1 is voltmeter circuit figure of the present utility model.
Fig. 2 is a reometer circuit diagram of the present utility model.
Fig. 3 is voltage sampling circuit figure of the present utility model.
Fig. 4 is current sampling circuit figure of the present utility model.
Primary clustering is described as follows in the accompanying drawing:
The tested power supply of U, I are tested current return, and D is a rectifier bridge, resistance R 3, and resistance R 1, B is a Switching Power Supply, A is an optocoupler, resistance R 2, C is a single-chip microcomputer, E is a digital display circuit.
Embodiment:
Below in conjunction with drawings and Examples the present invention is described further.
As can be seen from Figure 1, the input end of rectifier bridge (D) is received at the two ends of tested power supply (U) respectively, the anode of rectifier bridge (D) output and an end of resistance R 1, Switching Power Supply (B) input end joins, the positive pole of the other end of resistance R 1 and optocoupler (A) input side luminotron joins, the negative pole of optocoupler (A) input side luminotron and another input end of Switching Power Supply (B), the negative terminal of rectifier bridge (D) output joins, the collector of optocoupler (A) outgoing side phototriode is received the power end of Switching Power Supply (B) output head anode and single-chip microcomputer (C), the emitter of optocoupler (A) outgoing side phototriode is received an end of resistance R 2 and the A/D mouth of single-chip microcomputer (C), the ground end of the other end of resistance R 2 and single-chip microcomputer (C), Switching Power Supply (B) negative pole of output end joins, and the input end of the delivery outlet of single-chip microcomputer (C) and digital display circuit (E) joins.
Tested voltage signal is sent into the optocoupler input side by resistance step-down current limliting after the rectifier bridge rectification, the current signal of optocoupler outgoing side converts voltage signal to through resistance, and this voltage signal is sent into single-chip microcomputer and handled, and shows tested magnitude of voltage through digital display circuit again.
As can be seen from Figure 2, (I) seals in resistance R 3 at tested current return, the input end of rectifier bridge (D) is received at the two ends of resistance R 3 respectively, the anode of rectifier bridge (D) output and an end of resistance R 1, Switching Power Supply (B) input end joins, the positive pole of the other end of resistance R 1 and optocoupler (A) input side luminotron joins, the negative pole of optocoupler (A) input side luminotron and another input end of Switching Power Supply (B), the negative terminal of rectifier bridge (D) output joins, the collector of optocoupler (A) outgoing side phototriode is received the power end of Switching Power Supply (B) output head anode and single-chip microcomputer (C), the emitter of optocoupler (A) outgoing side phototriode is received an end of resistance R 2 and the A/D mouth of single-chip microcomputer (C), the ground end of the other end of resistance R 2 and single-chip microcomputer (C), Switching Power Supply (B) negative pole of output end joins, and the input end of the delivery outlet of single-chip microcomputer (C) and digital display circuit (E) joins.
The resistance that seals in the tested current return is little resistance resistance, this resistance is converted to voltage signal with current signal, this voltage signal is sent into the optocoupler input side by resistance step-down current limliting after the rectifier bridge rectification, the current signal of optocoupler outgoing side converts voltage signal to through resistance, this voltage signal is sent into single-chip microcomputer and is handled, and shows tested current value through digital display circuit again.
As can be seen from Figure 3, the input end of rectifier bridge (D) is received at the two ends of power supply (U) respectively, the anode of rectifier bridge (D) output and an end of resistance R 1, Switching Power Supply (B) input end joins, the positive pole of the other end of resistance R 1 and optocoupler (A) input side luminotron joins, the negative pole of optocoupler (A) input side luminotron and another input end of Switching Power Supply (B), the negative terminal of rectifier bridge (D) output joins, the collector of optocoupler (A) outgoing side phototriode is received the power end of Switching Power Supply (B) output head anode and single-chip microcomputer (C), the emitter of optocoupler (A) outgoing side phototriode is received an end of resistance R 2 and the A/D mouth of single-chip microcomputer (C), the ground end of the other end of resistance R 2 and single-chip microcomputer (C), Switching Power Supply (B) negative pole of output end joins, and the delivery outlet of single-chip microcomputer (C) is tested voltage sampling signal delivery outlet.
Tested voltage signal is sent into the optocoupler input side by resistance step-down current limliting after the rectifier bridge rectification, the current signal of optocoupler outgoing side converts voltage signal to through resistance, this voltage signal is sent into single-chip microcomputer and is handled, and the delivery outlet of single-chip microcomputer is tested voltage sampling signal delivery outlet.
As can be seen from Figure 4, (I) seals in resistance R 3 at tested current return, the input end of rectifier bridge (D) is received at the two ends of resistance R 3 respectively, the anode of rectifier bridge (D) output and an end of resistance R 1, Switching Power Supply (B) input end joins, the positive pole of the other end of resistance R 1 and optocoupler (A) input side luminotron joins, the negative pole of optocoupler (A) input side luminotron and another input end of Switching Power Supply (B), the negative terminal of rectifier bridge (D) output joins, the collector of optocoupler (A) outgoing side phototriode is received the power end of Switching Power Supply (B) output head anode and single-chip microcomputer (C), the emitter of optocoupler (A) outgoing side phototriode is received an end of resistance R 2 and the A/D mouth of single-chip microcomputer (C), the ground end of the other end of resistance R 2 and single-chip microcomputer (C), Switching Power Supply (B) negative pole of output end joins, and the delivery outlet of single-chip microcomputer (C) is tested current sampling signal delivery outlet.
The resistance that seals in the tested current return is little resistance resistance, this resistance is converted to voltage signal with current signal, this voltage signal is sent into the optocoupler input side by resistance step-down current limliting after the rectifier bridge rectification, the current signal of optocoupler outgoing side converts voltage signal to through resistance, this voltage signal is sent into single-chip microcomputer and is handled, and the delivery outlet of single-chip microcomputer is tested current sampling signal delivery outlet.
Claims (3)
1. alterating and direct current volt-ammeter and sample circuit based on a single-chip microcomputer and an optocoupler, it comprises rectifier bridge (D), resistance R 1, Switching Power Supply (B), optocoupler (A), resistance R 2, single-chip microcomputer (C), digital display circuit (E), it is characterized in that: the input end of rectifier bridge (D) is received at the two ends of tested power supply (U) respectively, the anode of rectifier bridge (D) output and an end of resistance R 1, Switching Power Supply (B) input end joins, the positive pole of the other end of resistance R 1 and optocoupler (A) input side luminotron joins, the negative pole of optocoupler (A) input side luminotron and another input end of Switching Power Supply (B), the negative terminal of rectifier bridge (D) output joins, the collector of optocoupler (A) outgoing side phototriode is received the power end of Switching Power Supply (B) output head anode and single-chip microcomputer (C), the emitter of optocoupler (A) outgoing side phototriode is received an end of resistance R 2 and the A/D mouth of single-chip microcomputer (C), the ground end of the other end of resistance R 2 and single-chip microcomputer (C), Switching Power Supply (B) negative pole of output end joins, and the input end of the delivery outlet of single-chip microcomputer (C) and digital display circuit (E) joins.
2. alterating and direct current volt-ammeter and sample circuit based on single-chip microcomputer and optocoupler according to claim 1, it is characterized in that: (I) seals in resistance R 3 at tested current return, the two ends that the input end of described rectifier bridge (D) is received resistance R 3.
3. alterating and direct current volt-ammeter and sample circuit based on single-chip microcomputer and optocoupler according to claim 1 and 2 is characterized in that: as sample circuit, single-chip microcomputer (C) delivery outlet is only exported sampled signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920137741U CN201392361Y (en) | 2009-04-21 | 2009-04-21 | AC/DC voltmeter and ammeter based on single chip microcomputer and optical coupler and sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920137741U CN201392361Y (en) | 2009-04-21 | 2009-04-21 | AC/DC voltmeter and ammeter based on single chip microcomputer and optical coupler and sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392361Y true CN201392361Y (en) | 2010-01-27 |
Family
ID=41599182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920137741U Expired - Fee Related CN201392361Y (en) | 2009-04-21 | 2009-04-21 | AC/DC voltmeter and ammeter based on single chip microcomputer and optical coupler and sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201392361Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812403A (en) * | 2010-04-06 | 2010-08-25 | 鲁东大学 | Circuit puncturing biological cell wall by using piezoelectric effect |
| CN102944837A (en) * | 2012-11-25 | 2013-02-27 | 山东电力集团公司滨州供电公司 | Device for monitoring breaker state |
| CN103076490A (en) * | 2011-10-25 | 2013-05-01 | 上海华建电力设备股份有限公司 | Alternating-current 220V input signal acquisition circuit |
| CN103837720A (en) * | 2012-11-21 | 2014-06-04 | 赵元雷 | Pure electric vehicle working ampere meter system formed by transforming fuel-powered vehicle water temperature gauge |
| CN108802485A (en) * | 2018-09-04 | 2018-11-13 | 攀枝花学院 | A kind of Digital AC ammeter module |
| CN109828140A (en) * | 2019-02-15 | 2019-05-31 | 杭州老板电器股份有限公司 | Electric current value calculating method, device and electronic equipment |
-
2009
- 2009-04-21 CN CN200920137741U patent/CN201392361Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812403A (en) * | 2010-04-06 | 2010-08-25 | 鲁东大学 | Circuit puncturing biological cell wall by using piezoelectric effect |
| CN103076490A (en) * | 2011-10-25 | 2013-05-01 | 上海华建电力设备股份有限公司 | Alternating-current 220V input signal acquisition circuit |
| CN103837720A (en) * | 2012-11-21 | 2014-06-04 | 赵元雷 | Pure electric vehicle working ampere meter system formed by transforming fuel-powered vehicle water temperature gauge |
| CN102944837A (en) * | 2012-11-25 | 2013-02-27 | 山东电力集团公司滨州供电公司 | Device for monitoring breaker state |
| CN108802485A (en) * | 2018-09-04 | 2018-11-13 | 攀枝花学院 | A kind of Digital AC ammeter module |
| CN109828140A (en) * | 2019-02-15 | 2019-05-31 | 杭州老板电器股份有限公司 | Electric current value calculating method, device and electronic equipment |
| CN109828140B (en) * | 2019-02-15 | 2021-09-24 | 杭州老板电器股份有限公司 | Current value calculation method and device and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201392361Y (en) | AC/DC voltmeter and ammeter based on single chip microcomputer and optical coupler and sampling circuit | |
| CN103063979B (en) | Load open-circuit detection circuit | |
| CN101217231A (en) | A control and protective circuit on control and protective switch electric apparatus | |
| CN201955389U (en) | Single-phase alternating-current voltage and current acquisition circuit | |
| CN102830266B (en) | Phase discriminating circuit of residual current phase | |
| CN204679622U (en) | With the three-phase intelligent electric-energy meter communication interface load capacity proving installation of communication module | |
| CN209070006U (en) | A kind of current sensor | |
| CN103063905A (en) | Single battery voltage isolation detecting system | |
| CN215066903U (en) | Low-frequency signal acquisition system | |
| CN202721656U (en) | After current phase demodulation circuit | |
| CN202329850U (en) | Temperature rise detecting system of switch apparatus | |
| CN202649420U (en) | Circuit for detecting switch on/off state of relay | |
| CN104655916A (en) | Alternating-current voltage effective value measuring device and method | |
| CN203117697U (en) | Current monitoring module | |
| CN206235684U (en) | A kind of charger automatic test instrument | |
| CN202548231U (en) | Detection device for substation merging unit | |
| CN211014450U (en) | Electrical quantity acquisition device of power distribution equipment | |
| CN209460379U (en) | Battery charge sensor circuit | |
| CN202424558U (en) | Three-phase rectifying bridge output direct-current current passive isolation sampling circuit | |
| CN201142564Y (en) | Control and protection circuit for controlling and protecting switch electric appliance | |
| CN206584023U (en) | A kind of excitation system controls angle measuring device | |
| CN206900179U (en) | A kind of Multi-channel type electric car charging equipment | |
| CN202471190U (en) | System for automatically detecting product performance of water level sensor | |
| CN201804080U (en) | Precision measurement unit and test system | |
| CN205920153U (en) | Electrified pronunciation of high tension switchgear generating line and SMS suggestion device |
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: 20100127 Termination date: 20120421 |