CN101995543B - Electric control board testing platform with detection signal and power supply isolation function - Google Patents
Electric control board testing platform with detection signal and power supply isolation function Download PDFInfo
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- CN101995543B CN101995543B CN201010503656.7A CN201010503656A CN101995543B CN 101995543 B CN101995543 B CN 101995543B CN 201010503656 A CN201010503656 A CN 201010503656A CN 101995543 B CN101995543 B CN 101995543B
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Abstract
The invention provides a dynamic tester with a detection signal and power supply isolation function. The tester comprises an RS485 communication circuit, a starting circuit and a Hall current sensor circuit, wherein an input end of a first isolated amplifier module circuit is connected with an input voltage detection signal, and a signal output end is connected with a singlechip circuit; an input end of the Hall current sensor circuit is connected with an input current detection signal, and an output end of the Hall current sensor circuit is connected with a signal input end of a second isolated amplifier module circuit; an output end of the second isolated amplifier module circuit is connected with the singlechip circuit; the RS485 communication circuit, the starting circuit, a relay starting circuit and a buzzer starting circuit are respectively connected with the singlechip circuit; a third power circuit is connected with the first isolated amplifier module circuit and the second isolated amplifier module circuit; a fifth power circuit is connected with the Hall current sensor circuit; and a seventh power circuit is connected with the singlechip circuit and the RS485 communication circuit. The scheme guarantees full isolation of input and output signals with power supply, over-voltage cannot occur, and the safety is greatly improved.
Description
Technical field:
The present invention relates to the electric circuit inspection technical field, refer in particular to a kind of electric-controlled plate test platform with detection signal and isolated from power function.
Background technology:
Traditional signal detection apparatus is not generally all taked the signal quarantine measures, and namely the direct I/O mouth of being connected with single-chip microcomputer of detection signal connects, the data that detect in addition also are to show by instrument, although this mode is simple and practical, no matter be security, or accuracy is all relatively poor.Surpass the ratings of single-chip processor i/o mouth such as input voltage signal, then can cause the damage of chip; Although some test circuits have also been taked some safeguard measures, as input signal is carried out amplitude limit clamp etc., can not solve safety issue fully.The commercial production scene is inclement condition often, various beyond thought situations all can occur at any time, if therefore a kind of method of test circuit can make input signal, output signal, working power mutually isolate, then can fundamentally solve the signal isolation difficult problem of long-term puzzlement testing tool.
Summary of the invention:
The object of the invention is to overcome the deficiencies in the prior art, provide the signal of the high signal isolation that utilizes the isolation amplifier module of a kind of fast response time, good stability, safe coefficient and Hall current sensor to isolate to realize the electric-controlled plate test platform of power supply, signal (I/O) three isolation.
For achieving the above object, technical scheme provided by the present invention is: a kind of electric-controlled plate test platform with detection signal and isolated from power function, it includes the 3rd power circuit, single chip circuit, start relay circuit, hummer start-up circuit, RS485 telecommunication circuit, start-up circuit, the first isolated amplifier modular circuit, Hall current sensor circuit, wherein, the input end of the first isolated amplifier modular circuit links to each other with the input voltage detection signal, and signal output part links to each other with single chip circuit; The input end of Hall current sensor circuit links to each other with the input current detection signal, and output terminal links to each other with the signal input part of the second isolated amplifier modular circuit, and the output terminal of the second isolated amplifier modular circuit links to each other with single chip circuit; RS485 telecommunication circuit, start-up circuit, start relay circuit, hummer start-up circuit link to each other with single chip circuit respectively; The 3rd power circuit links to each other with the first isolated amplifier modular circuit, the second isolated amplifier modular circuit; The 5th power circuit links to each other with the Hall current sensor circuit; The 7th power circuit links to each other with single chip circuit, RS485 telecommunication circuit.
The model of described the first isolated amplifier modular circuit is ISO EM-U2-P3-O4, and one, two pin connect the detection signal input end, and a pin connects the positive pole of detection signal voltage, and two pin connect the negative pole of detection signal voltage; Four, five pin of the first isolated amplifier modular circuit connect respectively the positive and negative electrode of the 3rd power circuit, the first isolated amplifier modular circuit eight, the 11 pin is the detection signal output terminal, and octal is the signal voltage negative pole, and with after the 6th resistance one end is connected again with the V of single chip circuit
SSPin is connected, and the 11 pin is that signal voltage is anodal, and be connected to again on the I/O mouth of single chip circuit after the 6th resistance other end is connected, the 7th power circuit is connected with single chip circuit.
The model of described Hall current sensor circuit is HNC01SY, its seven pin links to each other with the 8th resistance one end, the 8th resistance other end links to each other with the first relay normally open contact one end, the first relay other end links to each other with the test board power supply adaptor is anodal, and the second relay and the 8th resistance are connected in parallel on the input end of Hall current sensor circuit; The octal of Hall current sensor circuit links to each other with the test board power input; After light emitting diode and the series connection of the 9th resistance and at the test board power input; Three of Hall current sensor circuit, one, two pin respectively with the 5th power circuit+12V end, one pin-12V end is connected, and two pin ground connection also are connected with signal input part two pin of the second isolated amplifier modular circuit, the model of described the second isolated amplifier modular circuit is ISO EM-U2-P3-O4, signal input part one pin of four pin of Hall current sensor circuit and the second isolated amplifier modular circuit links to each other, signal output part 11 pin of the second isolated amplifier modular circuit respectively with the 5th resistance one end, the I/O mouth of single chip circuit connects, the signal output part octal of the second isolated amplifier modular circuit and the V that is connected to again single chip circuit after the 5th resistance other end is connected
SSOn the pin.
The present invention is after having adopted such scheme, and when the signal input part of the first isolated amplifier modular circuit did not detect voltage signal, then its signal output part voltage also was zero, shows that there is fault in board under test; When the test point that detects circuit board has signal voltage (5V), then its output terminal output equate or voltage signal by a certain percentage, and deliver to single chip circuit and carry out data and process; The RS485 circuit of test platform is to arrange for the communication function of board under test.The RS485 circuit of circuit board under test sends data-signal to the RS485 circuit of test platform, and when circuit worked, then the RS485 circuit of test platform is receivable sent data to test board to data, showed that communication is normal.Here, the working power of test board, the first isolated amplifier modular circuit, Hall current sensor circuit, single chip circuit all is independently, without any electrical link, guaranteed the complete buffer action of input, output signal and power supply, when superpotential appears in input signal, its output signal is in state of saturation, superpotential can not occur, and its security is greatly improved.
Description of drawings:
Fig. 1 is control principle drawing of the present invention.
Fig. 2 is circuit diagram of the present invention.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing 1 and accompanying drawing 2, preferred embodiment of the present invention is: the described electric-controlled plate test platform with detection signal and isolated from power function of the present embodiment includes the 3rd power circuit 3, single chip circuit 2, start relay circuit 11, hummer start-up circuit 12, RS485 telecommunication circuit 8, start-up circuit 9, the first isolated amplifier modular circuit 1, Hall current sensor circuit 4, wherein, the input end of the first isolated amplifier modular circuit 1 links to each other with the input voltage detection signal, and signal output part links to each other with single chip circuit 2; The input end of Hall current sensor circuit 4 links to each other with the input current detection signal, and output terminal links to each other with the signal input part of the second isolated amplifier modular circuit 6, and the output terminal of the second isolated amplifier modular circuit 6 links to each other with single chip circuit 2; RS485 telecommunication circuit 8, start-up circuit 9, start relay circuit 11, hummer start-up circuit 12 link to each other with single chip circuit 2 respectively; The 3rd power circuit 3 links to each other with the first isolated amplifier modular circuit 1, the second isolated amplifier modular circuit 6; The 5th power circuit 5 links to each other with Hall current sensor circuit 4; The 7th power circuit 7 links to each other with single chip circuit 2, RS485 telecommunication circuit 8.When the signal input part of the first isolated amplifier modular circuit 1 did not detect voltage signal, then its signal output part voltage also was zero, shows that there is fault in board under test; When the test point that detects circuit board has signal voltage 5V, then its output terminal output equate or voltage signal by a certain percentage, and deliver to single chip circuit 2 and carry out data and process; The RS485 circuit 8 of test platform is to arrange for the communication function of board under test.The RS485 circuit of circuit board under test sends data-signal to the RS485 circuit 8 of test platform, and when circuit worked, then the RS485 circuit 8 receivable data that arrive of test platform sent data to test board, show that communication is normal.Here, the working power of test board, the first isolated amplifier modular circuit 1, Hall current sensor circuit 4, single chip circuit 2 all is independently, without any electrical link, guaranteed the complete buffer action of input, output signal and power supply, when superpotential appears in input signal, its output signal is in state of saturation, superpotential can not occur, and its security is greatly improved.
One, two pin 1,2 of described the first isolated amplifier modular circuit 1 connect the detection signal input end, and a pin 1 connects the positive pole of detection signal voltage, and two pin 2 connect the negative pole of detection signal voltage; Four, five pin 4,5 of the first isolated amplifier modular circuit 1 connect respectively the positive and negative electrode of the 3rd power circuit 3, the eight, the 11 pin 8,11 of the first isolated amplifier modular circuit 1 is the detection signal output terminal, and octal 8 is the signal voltage negative pole, and with after the 6th resistance R 69 1 ends are connected again with the V of single chip circuit 2
SSPin is connected, and the 11 pin 11 is that signal voltage is anodal, and be connected to again on the I/O mouth of single chip circuit 2 after the 6th resistance R 69 other ends are connected, the 7th power circuit 7 is connected connection with single chip circuit.Seven pin 7 of described Hall current sensor circuit 4 link to each other with the 8th resistance R 65 1 ends, the 8th resistance R 65 other ends link to each other with the first relay J 1B normally opened contact one end, the first relay J 1B other end links to each other with test board power supply adaptor CN11 is anodal, and the second relay J 2B and the 8th resistance R 65 are connected in parallel on the input end of Hall current sensor circuit 4; The octal 8 of Hall current sensor circuit 4 links to each other with the test board power input; After light emitting diode D1 and 66 series connection of the 9th resistance R and at the test board power input; Three of Hall current sensor circuit 4, one pin 3,1 respectively with the 5th power circuit 5+12V end,-12V end is connected, and two pin, 2 ground connection also are connected with signal input part two pin 2 of the second isolated amplifier modular circuit 6, signal input part one pin 1 of four pin 4 of Hall current sensor circuit 4 and the second isolated amplifier modular circuit 6 links to each other, signal output part 11 pin 11 of the second isolated amplifier modular circuit 6 respectively with the 5th resistance R 67 1 ends, the I/O mouth of single chip circuit 2 connects, the signal output part octal 8 of the second isolated amplifier modular circuit 6 and the V that is connected to again single chip circuit 2 after the 5th resistance R 67 other ends are connected
SSOn the pin.When circuit board to be tested is called for short board under test after test board installs, start-up circuit sends enabling signal to single-chip microcomputer 2, and the test platform circuit is started working.After board under test power supply adaptor CN11 powered on, light-emitting diodes D1 pipe was bright, the first relay J 1B adhesive this moment, and the second relay J 2B disconnects.In normal range, show without short circuit or over-current phenomenon avoidance that such as the board under test load current value then the second relay J 2B adhesive continues down test.When exceeding normal range such as the board under test load current value, show that board under test has short circuit or over current fault, then the first relay J 1B discharges, and single-chip microcomputer 2 sends alerting signal, and simultaneously, 65 metering functions of the 8th resistance R prevent that short-circuit current from damaging device.
The embodiment of the above only is the present invention's preferred embodiment, is not to limit practical range of the present invention with this, therefore the variation that all shapes according to the present invention, principle are done all should be encompassed in protection scope of the present invention.
Claims (3)
1. electric-controlled plate test platform with detection signal and isolated from power function, it is characterized in that: it includes the 3rd power circuit (3), single chip circuit (2), start relay circuit (11), hummer start-up circuit (12), RS485 telecommunication circuit (8), start-up circuit (9), the first isolated amplifier modular circuit (1), Hall current sensor circuit (4), wherein, the input end of the first isolated amplifier modular circuit (1) links to each other with the input voltage detection signal, and signal output part links to each other with single chip circuit (2); The input end of Hall current sensor circuit (4) links to each other with the input current detection signal, output terminal links to each other with the signal input part of the second isolated amplifier modular circuit (6), and the output terminal of the second isolated amplifier modular circuit (6) links to each other with single chip circuit (2); RS485 telecommunication circuit (8), start-up circuit (9), start relay circuit (11), hummer start-up circuit (12) link to each other with single chip circuit (2) respectively; The 3rd power circuit (3) links to each other with the first isolated amplifier modular circuit (1), the second isolated amplifier modular circuit (6); The 5th power circuit (5) links to each other with Hall current sensor circuit (4); The 7th power circuit (7) links to each other with single chip circuit (2), RS485 telecommunication circuit (8).
2. a kind of electric-controlled plate test platform with detection signal and isolated from power function according to claim 1, it is characterized in that: the model of the first isolated amplifier modular circuit (1) is ISO EM-U2-P3-O4, one, two pin (1,2) connect the detection signal input end, and a pin (1) connects the positive pole of detection signal voltage, and two pin (2) connect the negative pole of detection signal voltage; Four, five pin (4,5) of the first isolated amplifier modular circuit (1) connect respectively the positive and negative electrode of the 3rd power circuit (3), the first isolated amplifier modular circuit (1) eight, the 11 pin (8,11) is the detection signal output terminal, and octal (8) is the signal voltage negative pole, and with after the 6th resistance (R69) end is connected again with the V of single chip circuit (2)
SSPin is connected, and the 11 pin (11) is that signal voltage is anodal, and be connected to again on the I/O mouth of single chip circuit (2) after the 6th resistance (R69) other end is connected, the 7th power circuit (7) is connected 2 with single chip circuit) connection.
3. a kind of electric-controlled plate test platform with detection signal and isolated from power function according to claim 1, it is characterized in that: the model of Hall current sensor circuit (4) is HNC01SY, its seven pin (7) links to each other with the 8th resistance (R65) end, the 8th resistance (R65) other end links to each other with the first relay (J1B) normally opened contact one end, the first relay (J1B) other end links to each other with test board power supply adaptor (CN11) is anodal, and the second relay (J2B) and the 8th resistance (R65) are connected in parallel on the input end of Hall current sensor circuit (4); The octal (8) of Hall current sensor circuit (4) links to each other with the test board power input; After light emitting diode (D1) and the 9th resistance (R66) series connection and at the test board power input; Three of Hall current sensor circuit (4), one pin (3,1) respectively with the 5th power circuit (5)+12V end,-12V end is connected, and two pin (2) ground connection also is connected with signal input part two pin (2) of the second isolated amplifier modular circuit (6), the model of described the second isolated amplifier modular circuit (6) is ISO EM-U2-P3-O4, four pin (4) of Hall current sensor circuit (4) link to each other with signal input part one pin (1) of the second isolated amplifier modular circuit (6), signal output part 11 pin (11) of the second isolated amplifier modular circuit (6) respectively with the 5th resistance (R67) end, the I/O mouth of single chip circuit (2) connects, the signal output part octal (8) of the second isolated amplifier modular circuit (6) and the V that is connected to again single chip circuit (2) after the 5th resistance (R67) other end is connected
SSOn the pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010503656.7A CN101995543B (en) | 2010-10-09 | 2010-10-09 | Electric control board testing platform with detection signal and power supply isolation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010503656.7A CN101995543B (en) | 2010-10-09 | 2010-10-09 | Electric control board testing platform with detection signal and power supply isolation function |
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| Publication Number | Publication Date |
|---|---|
| CN101995543A CN101995543A (en) | 2011-03-30 |
| CN101995543B true CN101995543B (en) | 2013-01-02 |
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| CN201010503656.7A Expired - Fee Related CN101995543B (en) | 2010-10-09 | 2010-10-09 | Electric control board testing platform with detection signal and power supply isolation function |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353858B (en) * | 2011-07-07 | 2013-05-15 | 佛山市中格威电子有限公司 | Intelligent tester for Semi-physical simulation test system of cabinet air conditioner |
| CN103064001B (en) * | 2011-10-22 | 2016-03-23 | 海信（山东）空调有限公司 | The detection method of variable-frequency compressor driving plate and pick-up unit thereof |
| CN103454574A (en) * | 2013-08-16 | 2013-12-18 | 安徽鑫龙电器股份有限公司 | Static testing device for circuit board |
| CN104459266A (en) * | 2014-12-12 | 2015-03-25 | 重庆和平自动化工程股份有限公司 | Electric quantity isolation module circuit |
| CN106330144B (en) * | 2016-08-05 | 2019-11-12 | 成都赛来机械有限公司 | Digital signal comparator |
| CN111142008B (en) * | 2019-12-31 | 2022-11-29 | 京信网络系统股份有限公司 | Circuit board power parameter testing system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB8800845D0 (en) * | 1988-01-14 | 1988-02-17 | Yorkshire Water Authority | Galvanic isolator |
| US7327133B2 (en) * | 2005-09-21 | 2008-02-05 | Universal Enterprises, Inc. | Current measuring device using hall sensors |
| CN201110876Y (en) * | 2007-10-23 | 2008-09-03 | 上海电缆研究所 | High-temperature superconduction material superconductivity test system |
| CN201173965Y (en) * | 2008-09-01 | 2008-12-31 | 四川电力试验研究院 | Core technical parameter automatic test system of electric project DC power source equipment |
| CN201285411Y (en) * | 2008-10-31 | 2009-08-05 | 北京宇航系统工程研究所 | Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system |
| CN201886120U (en) * | 2010-10-09 | 2011-06-29 | 佛山市中格威电子有限公司 | Dynamic tester with function of isolating test signals and power supplies |
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