CN103383908B - A kind of checkout gear of on-off state of multi-loop miniature circuit breaker - Google Patents
A kind of checkout gear of on-off state of multi-loop miniature circuit breaker Download PDFInfo
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- CN103383908B CN103383908B CN201210138047.5A CN201210138047A CN103383908B CN 103383908 B CN103383908 B CN 103383908B CN 201210138047 A CN201210138047 A CN 201210138047A CN 103383908 B CN103383908 B CN 103383908B
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Abstract
The present invention relates to a kind of checkout gear of on-off state of multi-loop miniature circuit breaker, comprise circuit breaker lead-out wire, sampling circuit, electronic switch and micro-control unit, one end of described circuit breaker lead-out wire connects miniature circuit breaker, and the other end connects sampling circuit, electronic switch and micro-control unit successively; The voltage signal of miniature circuit breaker transfers to sampling circuit by circuit breaker lead-out wire, sampling circuit is sampled to voltage signal, by electronic switch by sampled voltage Signal transmissions to micro-control unit, after micro-control unit carries out analog-to-digital conversion to sampled voltage signal, comparative voltage signal and the magnitude relationship presetting threshold values, judge the on off operating mode of miniature circuit breaker.Compared with prior art, the present invention has the advantages such as the antijamming capability that installation is simple, cost is low, can strengthen switching node.
Description
Technical field
The present invention relates to a kind of device detecting circuit breaker on off operating mode, especially relate to a kind of checkout gear of on-off state of multi-loop miniature circuit breaker.
Background technology
In data equipment network row cabinet, power supply row cabinet, often have a lot of under each inlet wire and go out linear load, and each go out the break-make of linear load controlled by miniature circuit breaker, and in this type of cabinet, often need the monitoring carrying out each miniature circuit breaker on off operating mode.
Usual manner is configure auxiliary contact on each miniature circuit breaker, and this contact is for having no chance switching node, and when miniature circuit breaker disconnects, auxiliary contact are off, and when miniature circuit breaker closes, auxiliary contact close; These auxiliary contact are linked into (this device generally can monitor tens loops) in special passive switch node monitors device, by the disconnection of auxiliary contact with close and monitor miniature circuit breaker on off operating mode, see Fig. 1, in figure, QF1 ~ QFn is miniature circuit breaker, and K1 ~ Kn is the auxiliary contact of miniature circuit breaker.
The advantage of this mode is adopted to be accurately to judge the on off operating mode of miniature circuit breaker, shortcoming is that cost is too high, the cost of single miniature circuit breaker is also with regard to tens yuan, increase auxiliary contact then to need separately to add one, 20 yuan, and some miniature circuit breaker is not also supported to increase auxiliary contact, even if can auxiliary contact be increased, installing space is also a cumbersome problem (switching width being furnished with auxiliary contact be 2-3 not with auxiliary contact switch width doubly), and client is often because the problem of cost and installation and this mode of displeased employing.
Summary of the invention
Object of the present invention is exactly provide a kind of checkout gear installing the on-off state of multi-loop miniature circuit breaker simple, cost is low to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of checkout gear of on-off state of multi-loop miniature circuit breaker, comprise circuit breaker lead-out wire, sampling circuit, electronic switch and micro-control unit, one end of described circuit breaker lead-out wire connects miniature circuit breaker, and the other end connects sampling circuit, electronic switch and micro-control unit successively;
The voltage signal of miniature circuit breaker transfers to sampling circuit by circuit breaker lead-out wire, sampling circuit is sampled to voltage signal, by electronic switch by sampled voltage Signal transmissions to micro-control unit, after micro-control unit carries out analog-to-digital conversion to sampled voltage signal, comparative voltage signal and the magnitude relationship presetting threshold values, judge the on off operating mode of miniature circuit breaker.
Described sampling circuit comprises divider resistance, sampling resistor and filter circuit, described divider resistance is connected with filter circuit, one end of described sampling resistor is connected with zero line, and the other end is connected with the tie point of divider resistance and filter circuit, and described filter circuit connects electronic switch.
On described sampling circuit, the voltage be connected with for raising sampled voltage signal raises circuit.
Described voltage is raised circuit and is comprised voltage source, resistance Ra, resistance Rb, resistance Rc and pressurizer, one end of described resistance Ra connects voltage source, the other end is contact resistance Rb and resistance Rc successively, described resistance Rc ground connection, one end of described pressurizer is connected with the tie point of resistance Ra and resistance Rb, other end ground connection, described pressurizer is also provided with the 3rd end, and described three-terminal link resistance Rb is connected with zero line with after the tie point of resistance Rc.
Described miniature circuit breaker has multiple, and each miniature circuit breaker is connected to electronic switch respectively by circuit breaker lead-out wire and sampling circuit.
Compared with prior art, the present invention has the following advantages:
1) save the use cost of user, eliminate the auxiliary contact of miniature circuit breaker;
2) antijamming capability of switching node can be strengthened, the monitoring of passive switch amount is adopted easily to affect by wiring, connect up lack of standardization, often scurry into interference signal in the loop, cause erroneous judgement, and the circuit adopting the present invention to design, then carry out filtering interference signals by setting threshold values, if threshold value setting is AC150V, then measure the voltage obtained and then think that (voltage of this type of application scenario is all generally very stable to miniature circuit breaker off-state without exception lower than 150V, can not more than AC220V ± 10%, other occasions other appropriate threshold configurable), even if like this because connecting up lack of standardization and introducing interference signal and cause line has voltage, also interference can not be produced to state-detection,
3) greatly the resource that uses of hardware designs and difficulty is reduced.
Accompanying drawing explanation
Fig. 1 is the existing schematic diagram being judged miniature circuit breaker break-make by auxiliary contact;
Fig. 2 is that the present invention judges the schematic diagram of miniature circuit breaker break-make by lead-out wire;
Fig. 3 is structural representation of the present invention;
Fig. 4 is sampled signal waveform schematic diagram;
Fig. 5 is the schematic diagram that voltage of the present invention raises circuit;
Fig. 6 is the waveform schematic diagram after raising.
In Fig. 1-2: QF1 to QFn is miniature circuit breaker, K1 to Kn is auxiliary contact, and QF1B to QFnB is circuit breaker lead-out wire, and L1 to Ln is load;
In Fig. 3, R1 to R15 and R25 to R33 is divider resistance, and R16 to R19 and R34 to R37 is sampling resistor, and R20 to R24, R38 to R40 and C1 to C8 form filter circuit, and IC1 is electronic switch, and MCU is micro-control unit;
In Fig. 4, VCC is voltage source, and D is pressurizer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As Figure 2-3, a kind of checkout gear of 8 loop miniature circuit breaker on off operating modes, the upper each connection of miniature circuit breaker QF1 ~ QF8 1 circuit breaker lead-out wire QF1B ~ QF8B, circuit breaker lead-out wire connects micro-control unit MCU by sampling circuit, electronic switch IC1 successively.Sampling circuit comprises divider resistance, sampling resistor and filter circuit, and divider resistance is connected with filter circuit, and one end of sampling resistor is connected with zero line, and the other end is connected with the tie point of divider resistance and filter circuit, and filter circuit connects electronic switch.
When QF 1 miniature circuit breaker closes, AC220V voltage introduces sampling circuit by circuit breaker lead-out wire QF1B.AC220V voltage is by divider resistance R1, R6, R11 dividing potential drop, sampling resistor R16 samples, obtain a voltage signal, in like manner, other 7 miniature circuit breakers also obtain a voltage signal by dividing potential drop, sampling, the voltage signal in 8 loops is switched by electronic switch IC1 after filter circuit R20 and C1 filtering, and the AD mouth that timesharing enters micro-control unit MCU carries out the AD conversion of signal.Here electronic switch why will be adopted to switch, mainly reduce the AD mouth use amount of MCU, if the AD mouth of MCU is directly linked in each loop, then when feeder number is more, then AD mouth is not enough, adopt the mode that electronic switch switches, an AD mouth just can detect the on off state of multiple miniature circuit breaker.In Fig. 3, AD mouth just can detect the on off state of 8 miniature circuit breakers.
Because the voltage signal of this sampling is AC signal, AC signal is sinusoidal signal, as shown in Figure 4, the AD mouth of MCU cannot directly be changed it, therefore this signal is also needed to raise, the zero line side of sampling circuit is connected to voltage to be raised on circuit, as shown in Figure 5, voltage is raised circuit and is comprised voltage source, resistance Ra, resistance Rb, resistance Rc and pressurizer, one end of resistance Ra connects voltage source, the other end is contact resistance Rb and resistance Rc successively, resistance Rc ground connection, one end of pressurizer is connected with the tie point of resistance Ra and resistance Rb, other end ground connection, pressurizer is also provided with the 3rd end, three-terminal link resistance Rb is connected with zero line N with after the tie point of resistance Rc.Voltage signal after raising as shown in Figure 6.
Micro-control unit MCU adopts alternating sampling alogrithm that the signal after AD conversion is converted into measuring voltage value, namely measures the magnitude of voltage of this passage.The magnitude of voltage measured and the threshold values preset are contrasted, then thinks that the miniature circuit breaker on this road is in closure state higher than threshold values, if then can think that the miniature circuit breaker on this road is in off-state lower than threshold values.
Claims (4)
1. the checkout gear of an on-off state of multi-loop miniature circuit breaker, it is characterized in that, comprise circuit breaker lead-out wire, sampling circuit, electronic switch and micro-control unit, one end of described circuit breaker lead-out wire connects miniature circuit breaker, the other end connects sampling circuit, electronic switch and micro-control unit successively, described miniature circuit breaker has multiple, and each miniature circuit breaker is connected to electronic switch respectively by circuit breaker lead-out wire and sampling circuit;
The voltage signal of miniature circuit breaker transfers to sampling circuit by circuit breaker lead-out wire, the voltage signal of sampling circuit to miniature circuit breaker is sampled, by electronic switch by sampled voltage Signal transmissions to micro-control unit, after micro-control unit carries out analog-to-digital conversion to sampled voltage signal, voltage signal relatively after conversion and the magnitude relationship presetting threshold values, judge the on off operating mode of miniature circuit breaker.
2. the checkout gear of a kind of on-off state of multi-loop miniature circuit breaker according to claim 1, it is characterized in that, described sampling circuit comprises divider resistance, sampling resistor and filter circuit, described divider resistance is connected with filter circuit, one end of described sampling resistor is connected with zero line, the other end is connected with the tie point of divider resistance and filter circuit, and described filter circuit connects electronic switch.
3. the checkout gear of a kind of on-off state of multi-loop miniature circuit breaker according to claim 1, is characterized in that, on described sampling circuit, the voltage be connected with for raising sampled voltage signal raises circuit.
4. the checkout gear of a kind of on-off state of multi-loop miniature circuit breaker according to claim 3, it is characterized in that, described voltage is raised circuit and is comprised voltage source, resistance Ra, resistance Rb, resistance Rc and pressurizer, one end of described resistance Ra connects voltage source, the other end is contact resistance Rb and resistance Rc successively, described resistance Rc ground connection, one end of described pressurizer is connected with the tie point of resistance Ra and resistance Rb, other end ground connection, described pressurizer is also provided with the 3rd end, described three-terminal link resistance Rb is connected with zero line with after the tie point of resistance Rc.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138047.5A CN103383908B (en) | 2012-05-04 | 2012-05-04 | A kind of checkout gear of on-off state of multi-loop miniature circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210138047.5A CN103383908B (en) | 2012-05-04 | 2012-05-04 | A kind of checkout gear of on-off state of multi-loop miniature circuit breaker |
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| CN103383908A CN103383908A (en) | 2013-11-06 |
| CN103383908B true CN103383908B (en) | 2015-08-19 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301484A (en) * | 2014-05-30 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Passive contact testing device |
| CN104535887B (en) * | 2015-01-23 | 2018-01-12 | 浙江中控技术股份有限公司 | A kind of output switch parameter circuit breaking diagnostic system and switching value output module |
| JP6365467B2 (en) * | 2015-08-28 | 2018-08-01 | 株式会社デンソー | Disconnection detector |
| CN110554336B (en) * | 2019-09-04 | 2021-09-10 | 上海东软医疗科技有限公司 | State detection device and method, and transceiving state control system and method |
| CN111090070B (en) * | 2019-12-10 | 2022-04-08 | 上海东软医疗科技有限公司 | State control system and state detection device thereof |
| CN112433147A (en) * | 2020-10-30 | 2021-03-02 | 国网山东省电力公司聊城供电公司 | High-voltage circuit breaker control circuit fault self-diagnosis device |
| CN113567502A (en) * | 2021-03-30 | 2021-10-29 | 安海机电科技(苏州)有限公司 | Moisture detection in electronic switching circuits |
| CN113933691A (en) * | 2021-07-30 | 2022-01-14 | 东风商用车有限公司 | Switch endurance automatic testing and monitoring system based on MCU control |
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| CN201465923U (en) * | 2009-05-14 | 2010-05-12 | 何成祥 | Four-pole low-voltage circuit breaker capable of visually displaying working condition of each pole of circuit |
| CN101865963A (en) * | 2010-07-08 | 2010-10-20 | 山东电力研究院 | New quick detection method for relay protective device |
| CN201750604U (en) * | 2010-08-18 | 2011-02-16 | 佛山市顺德区瑞德电子实业有限公司 | Output over-voltage self-locking circuit |
| CN201937171U (en) * | 2011-01-24 | 2011-08-17 | 鑫田（唐山）电气工程有限公司 | Multi-loop monitoring type low-voltage power-distribution cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6545849B1 (en) * | 1999-12-20 | 2003-04-08 | General Electric Company | Instantaneous fault detection circuit method and apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2463840Y (en) * | 2001-01-12 | 2001-12-05 | 长沙丰日电气集团有限公司 | Battery survey monitor |
| CN201465923U (en) * | 2009-05-14 | 2010-05-12 | 何成祥 | Four-pole low-voltage circuit breaker capable of visually displaying working condition of each pole of circuit |
| CN101865963A (en) * | 2010-07-08 | 2010-10-20 | 山东电力研究院 | New quick detection method for relay protective device |
| CN201750604U (en) * | 2010-08-18 | 2011-02-16 | 佛山市顺德区瑞德电子实业有限公司 | Output over-voltage self-locking circuit |
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| CN103383908A (en) | 2013-11-06 |
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Address after: 201801 Jiading District Green Road, No. 253, Shanghai Patentee after: ACREL Co.,Ltd. Address before: 201801 Jiading District Green Road, No. 253, Shanghai Patentee before: Shanghai Acrel Ltd. |
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Effective date of registration: 20150924 Address after: 201801 Jiading District Green Road, No. 253, Shanghai Patentee after: ACREL Co.,Ltd. Patentee after: JIANGSU ACREL ELECTRICAL APPLIANCE MANUFACTURE Co.,Ltd. Address before: 201801 Jiading District Green Road, No. 253, Shanghai Patentee before: ACREL Co.,Ltd. |