CN2718874Y - Available solidified universal one-chip processor anti-electric wall control chip - Google Patents

Abstract

The utility model discloses an available solidified universal monolithic computer anti-electric wall control chip, which belongs to the technical field of monolithic computers. The utility model comprises a monolithic computer chip and a periphery structure. The utility model particularly relates to an anti-electric wall technology for securing personal safety when the basic insulation and a ground line of a control circuit of an electric appliance for families or other similar purposes are failed simultaneously. The utility model is mainly characterized in that a voltage detecting circuit between the ground line and a zero line is connected with an I/O input terminal of a monolithic computer. The monolithic computer decides whether to access the anti-electric wall device or not according to that the specified I/O input terminal is connected to the ground or not and cut off the ground line and a power of an electric appliance according to an effective electric potential difference signal between the ground line and the zero line. The utility model is suitable for various control modes of all kinds of domestic and other electric appliances having similar usages and different electric appliances to use, which is especially applied to batch solidifying of the monolithic computer having the functions. The anti-electric wall control chip provided by the utility model of the utility model is used for the control circuits of the domestic and other electric appliances not having the functions.

Description

Can be for the anti-electric wall control chip of the general single chip that solidifies

Technical field the invention belongs to microchip technology field, and particularly electrical appliance ground wire and basic insulation lost efficacy or the anti-electric wall technology during ground wire electrification simultaneously.

The described anti-electric wall technology of background technology the invention is meant at the electrical appliance ground wire and basic insulation lost efficacy simultaneously or can cut off ground wire during ground wire electrification in real time and the electrical appliance power supply is guaranteed the proprietary technology of personal safety.

As everyone knows, the ground connection in family expenses and the similar applications electric equipment products standard-required user family must be reliably, and the standard plug that the band ground wire also is housed in its product is for linking to each other good with assurance ground connection with ground wire in the socket.And poor in China and some regional power utilization environments of the world, the ground connection of many buildings is insecure, or even lack.In this case, qualified family expenses and the similar applications electrical equipment safety that can not guarantee the user.The anti-electric wall technology that the invention relates to is exactly specially at China and some regional specific environments of the world, promptly guarantees user's safety under unsafe power utilization environment.And before the invention applying date; do not have the anti-electric wall technology that cut off the personal safety protection of ground wire and electrical appliance power supply in real time when ground wire and basic insulation lost efficacy simultaneously as the singlechip chip in family expenses and the similar electrical apparatus control circuit, bring potential safety hazard for the user who does not have good earth.

The purpose of summary of the invention the invention just provides a kind of for the anti-electric wall control chip of the general single chip that solidifies, overcome the shortcoming that above-mentioned prior art exists in family expenses and the similar applications electrical apparatus control circuit, make family expenses with anti-electric wall technology and similar applications electrical equipment provide a kind of at the electrical appliance ground wire with basic insulation lost efficacy simultaneously or can cut off ground wire and electrical appliance power supply in real time during ground wire electrification, even under dangerous electrical environment, also can guarantee user's safety.The invention can be used for family expenses that need not anti-electric wall technology and similar applications electrical equipment when it is unsettled by the flag bit of the I/O port of fixed address, and the relay circuit of I/O output control is simultaneously guaranteed to recover or do not influence normal use at family expenses and similar applications electrical equipment when ground wire is not charged simultaneously.

The invention solves the technical scheme that its technical problem adopts: comprise singlechip chip and peripheral structure, be connected to potential difference detecting device between cross-over connection ground wire E and zero line N at the single-chip processor i/o input.The I/O port of single-chip microcomputer is provided with flag bit, inserts electricity-preventing wall device during its ground connection automatically, and being equivalent to when it is unsettled does not have anti-electric wall single-chip microcomputer.The potential difference detecting device of cross-over connection between ground wire E and zero line N is by transformer T or resistance-capacitance circuit R ₁C ₁Step-down, D ₁～D ₄Diode rectification, capacitor C ₀Voltage stabilizing circuit and switching tube Q that voltage-stabiliser tube DW forms ₀Form, when ground wire electrification, provide the useful signal of the current potential between ground wire and zero line to central processing unit I/O input port.

The invention is provided with electricity-preventing wall device at the I/O of single-chip microcomputer fixed address port and inserts flag bit, when flag bit ground connection, inserts electricity-preventing wall device during start automatically.The invention is established cross-over connection simultaneously in ground wire E _INAnd the potential difference detecting device between zero line N, this installs by transformer T or capacitance-resistance R ₁C ₁Step-down D ₁～D ₄Diode rectification, capacitor C ₀, voltage-stabiliser tube DW and switching tube Q ₀Form Q ₀Be connected with the single-chip processor i/o input, provide ground wire normal or charged logical signal to central processing unit I/O input port, central processing unit is by the break-make of I/O output port control relay executive circuit.The relay executive circuit is by drive circuit Q ₁, Q ₂And relay J ₁, J ₂Form, be serially connected with ground wire E respectively at its normally-closed contact, normally opened contact _IN, E _OUTAnd electrical appliance power supply L _IN, L _OUTThe relay executive circuit is controlled by central processing unit, cuts off being connected on relay J when ground wire electrification ₁, J ₂Ground wire and appliances power source.Under normal circumstances, the relay normally-closed contact is guaranteed ground wire E _1N, E _OUTAnd electrical appliance power supply L _IN, L _OUTConnect.The relay executive circuit is controlled by central processing unit, cuts off being serially connected in relay J when ground wire electrification ₁, J ₂Ground wire and electrical appliance power supply.Under normal circumstances, the relay normally-closed contact is guaranteed ground wire E _IN, E _OUTAnd electrical appliance power supply L _IN, L _OUTConnection present embodiment relay be set to J ₁, J ₂, can increase the quantity of relay to different family expenses and similar applications electrical equipment.

The beneficial effect of the invention is: the singlechip chip that a kind of anti-electric wall construction of band of general Gong curing is provided for family expenses and similar applications electrical equipment; highly versatile; can produce in batches; the control chip that is suitable for various family expenses and similar applications electrical equipment uses; do not influence ground wire and normally or not need the use under the situation of anti-electric wall technology, its single-chip microcomputer central processing unit also can with family expenses and similar applications electrical equipment single chip machine controlling circuit shared resource.

Appended drawings is the electrical schematic diagram of the invention.E among the figure _INBe ground wire end of incoming cables, E _OUTBe the ground wire leading-out terminal, promptly link to each other with the electrical appliance earth terminal; L _INBe the live wire end of incoming cables, promptly link to each other with electrical appliance live wire end; N is a zero line, and 12V is the 12V DC power supply.I/O (1) is the zero earth line test device input, and I/O (2) is the program curing flag bit, and T is a transformer, R ₁C ₁Be resistance-capacitance circuit, D ₁～D ₄Be rectifier diode, C ₀Be electric capacity, DW is a pressurizer, Q ₀Be switching tube, Q ₁, Q ₂Be drive circuit triode, J ₁, J ₂Be relay.

Singlechip control chip adopts PIC16C54 or PIC16C57 chip microprocessor able to programme among embodiment the invention embodiment, and scope can be expanded as various family expenses and similar applications electrical equipment singlechip control chip during actual the use.I/O (1) is the zero earth line test device input, and I/O (2) is a flag bit, and flag bit ground connection is effective.Cross-over connection is in zero line N and ground wire E _INBetween potential difference detecting device by transformer T or resistance-capacitance circuit R ₁C ₁(among the figure shown in the dotted line) step-down, D ₁～D ₄Diode rectification, capacitor C ₀, voltage-stabiliser tube the DW voltage stabilizing circuit and the switching tube Q that form ₀Form switching tube Q ₀Be connected in central processing unit I/O input port, I/O output port control relay executive circuit Q ₁, Q ₂, J ₁, J ₂The relay normally-closed contact connects ground wire E _INAnd E _OUT, normally opened contact connects electrical appliance L _INAnd L _OUT

Claims (3)

1, a kind ofly comprises singlechip chip and peripheral structure, it is characterized in that being connected to potential difference detecting device between cross-over connection ground wire E and zero line N at the single-chip processor i/o input for the anti-electric wall control chip of the general single chip that solidifies.

2, the anti-electric wall control chip of the general single chip for curing according to claim 1 is characterized in that the I/O port of single-chip microcomputer is provided with flag bit, inserts electricity-preventing wall device during its ground connection automatically, and being equivalent to when it is unsettled does not have the electric wall single-chip microcomputer of preventing.

3, according to claim 1 for the anti-electric wall control chip of the general single chip that solidifies, it is characterized in that the potential difference detecting device of cross-over connection between ground wire E and zero line N is by transformer T or resistance-capacitance circuit R ₁C ₁Step-down, D ₁～D ₄Diode rectification, capacitor C ₀Voltage stabilizing circuit and switching tube Q that voltage-stabiliser tube DW forms ₀Form, when ground wire electrification, provide the useful signal of the current potential between ground wire and zero line to central processing unit I/O input port.

Images