CN1658462A - Personal safety protector for controlling circuit of electrical equipment when earth wire failure - Google Patents
Personal safety protector for controlling circuit of electrical equipment when earth wire failure Download PDFInfo
- Publication number
- CN1658462A CN1658462A CN 200510049089 CN200510049089A CN1658462A CN 1658462 A CN1658462 A CN 1658462A CN 200510049089 CN200510049089 CN 200510049089 CN 200510049089 A CN200510049089 A CN 200510049089A CN 1658462 A CN1658462 A CN 1658462A
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- CN
- China
- Prior art keywords
- personal safety
- control circuit
- chip microcomputer
- switching tube
- wire
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- 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.)
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- Emergency Protection Circuit Devices (AREA)
Abstract
This invention discloses a personal safety protection device as the control circuit does not work on the grounded wire, and belongs to the application in the field of monolithic machine technology. It especially relates to the anti-electric wall technology protecting personal safety when the base insulation of grounded wires of home use or other usage. The characteristics are: a transformer or a voltage reducing circuit is connected between the grounded wire and the zero wire and connects to monolithic machine I/O through switching tube to be input to the port. The monolithic machine receives the electro difference signal between the zero grounded wires, cuts off the power supply of the grounded wire and the electric body when the grounded wire is with electricity. Three I/O mark locations realize the operation on the eight different impending combinations. This invention is aim to protect the personal safety when the grounded wire is unreliable or does not work and realize the resource share of the monolithic control circuit.
Description
Technical field belongs to singlechip technology in the control Application for Field, is intended to protect the anti-electric wall technology of personal safety when particularly the basic insulation of family expenses and similar applications electrical equipment ground wire lost efficacy simultaneously.
Anti-electric wall function when not having ground wire electrification in the family expenses before background technology the invention and the single chip machine controlling circuit of similar applications electrical equipment.
The purpose of summary of the invention the invention just provides the personal safety protector of a kind of electrical apparatus control circuit when earth wire failure.
The invention solves the technical scheme that its technical problem adopts: in the potential difference detecting device that is connected between ground wire and zero line between zero line and ground wire.The potential difference detecting device of cross-over connection between zero line and ground wire is by transformer or resistance-capacitance circuit step-down, diode rectification, voltage stabilizing circuit and switching tube that electric capacity, voltage-stabiliser tube are formed are formed, transformer or resistance-capacitance depressurization circuit, connect the single-chip processor i/o input port by switching tube, switching tube provides logical signal to the single-chip microcomputer input port when ground wire electrification.The single-chip microcomputer output port is connected with the switching tube base stage, and the switching tube collector electrode is connected with relay coil.Three I/O flag bits of single-chip microcomputer are by ground connection and 1-8 corresponding dissimilar controlling object work of unsettled eight kinds of combination may command, when flag bit is the full no marks position single-chip microcomputer that is equivalent to 0 time.Single-chip microcomputer can be provided with separately also and can share with the single-chip microcomputer in the former control circuit, shared resource.
The beneficial effect of the invention is: the invention is intended under the unreliable or earth wire failure environment of ground connection personal safety protection and realizes the resource-sharing of single chip machine controlling circuit.
Description of drawings Fig. 1 is the electrical schematic diagram of the invention.
Embodiment is consulted Fig. 1.E
INBe ground wire end of incoming cables, E
OUTBe ground wire leading-out terminal, L
INBe live wire end of incoming cables, L
OUTBe the live wire leading-out terminal, N is a zero line, and 12V is the 12V DC power supply.Cross-over connection is in Zero-liue N, E
INBetween potential difference detecting device by transformer T or resistance-capacitance circuit R
1C
1Step-down, D
1～D
4Diode rectification, capacitor C
0, voltage-stabiliser tube DW voltage stabilizing circuit and the switching tube formed form switching tube Q
0Be connected in the single-chip processor i/o input port, I/O output port control switch pipe G
1-G
2And relay J
1, J
2Relay access ground wire or ground wire, live wire loop.Relay J
1Normally-closed contact connects the end of incoming cables E of ground wire
INWith leading-out terminal E
OUT, relay J
2Normally opened contact connects the end of incoming cables L of live wire
INWith live wire leading-out terminal L
OUTThree I/O flag bit B of single-chip microcomputer
1, B
2, B
3Ground connection (I/O=1) and unsettled (I/O=0) eight kinds combinations 000,001,010,011,100,101,110,111 can control 1-8 electrical equipment, its complete being equivalent to when unsettled is not established flag bit.Share the model that the single-chip microcomputer employing is identical with former electrical apparatus control circuit for realizing mcu resource.
Claims (5)
1, the personal safety protector of a kind of electrical apparatus control circuit when earth wire failure; belong to singlechip technology in the control Application for Field; the basic insulation that is particularly related to family expenses and similar applications electrical equipment ground wire was intended to protect the anti-electric wall technology of personal safety when losing efficacy simultaneously, it is characterized in that in the potential difference detecting device that is connected between ground wire and zero line between zero line and ground wire.
2, the personal safety protector of electrical apparatus control circuit according to claim 1 when earth wire failure; it is characterized in that the potential difference detecting device of cross-over connection between zero line and ground wire is by transformer or resistance-capacitance circuit step-down; diode rectification; voltage stabilizing circuit and switching tube that electric capacity, voltage-stabiliser tube are formed are formed; transformer or resistance-capacitance depressurization circuit; connect the single-chip processor i/o input port by switching tube, switching tube provides logical signal to the single-chip microcomputer input port when ground wire electrification.
3, the personal safety protector of electrical apparatus control circuit according to claim 1 when earth wire failure is characterized in that the single-chip microcomputer output port is connected with the switching tube base stage, and the switching tube collector electrode is connected with relay coil.
4, the personal safety protector of electrical apparatus control circuit according to claim 1 when earth wire failure; three I/O flag bits that it is characterized in that single-chip microcomputer are by ground connection 1-8 the dissimilar controlling object work corresponding with eight kinds of unsettled combination may command, when flag bit is the full no marks position single-chip microcomputer that is equivalent to 0 time.
5, the personal safety protector of electrical apparatus control circuit according to claim 1 when earth wire failure is characterized in that described single-chip microcomputer can be provided with separately also can to share shared resource with the single-chip microcomputer in the former control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049089 CN1658462A (en) | 2005-02-06 | 2005-02-06 | Personal safety protector for controlling circuit of electrical equipment when earth wire failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049089 CN1658462A (en) | 2005-02-06 | 2005-02-06 | Personal safety protector for controlling circuit of electrical equipment when earth wire failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1658462A true CN1658462A (en) | 2005-08-24 |
Family
ID=35007774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510049089 Pending CN1658462A (en) | 2005-02-06 | 2005-02-06 | Personal safety protector for controlling circuit of electrical equipment when earth wire failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1658462A (en) |
-
2005
- 2005-02-06 CN CN 200510049089 patent/CN1658462A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |