CN104158165B - Surge protector and surge protection circuit with counting display - Google Patents

Surge protector and surge protection circuit with counting display Download PDF

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Publication number
CN104158165B
CN104158165B CN201410401771.1A CN201410401771A CN104158165B CN 104158165 B CN104158165 B CN 104158165B CN 201410401771 A CN201410401771 A CN 201410401771A CN 104158165 B CN104158165 B CN 104158165B
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China
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circuit
resistance
end
electrically connected
counting
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CN201410401771.1A
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Chinese (zh)
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CN104158165A (en
Inventor
喻杭斌
甘雪
罗刚
冷应祥
赖生华
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重庆正博仪器工业有限公司
甘雪
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Priority to CN201410401771.1A priority Critical patent/CN104158165B/en
Publication of CN104158165A publication Critical patent/CN104158165A/en
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Publication of CN104158165B publication Critical patent/CN104158165B/en

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Abstract

The invention discloses a surge protector and a surge protection circuit with counting display. The surge protection circuit with counting display comprises a base circuit used for receiving and outputting signals and distributing lightning energy discharged by discharge circuits of all stages in the surge protection circuit, a first-stage discharge circuit used for discharging lightning electricity, a second-stage discharge circuit used for discharging remaining residual voltage of the first-stage discharge circuit, a leakage detection circuit used for detecting whether the second-stage discharge circuit leaks electricity, a sampling and counting circuit used for recording the number of discharge times of the first-stage discharge circuit, a central processing circuit used for processing signals transmitted by the sampling and counting circuit and the leakage detection circuit, a display circuit used for giving a prompt on whether a surge discharge element needs to be replaced, and a power supply circuit used for supplying power to the sampling and counting circuit directly and supplying power to the central processing circuit, the leakage detection circuit and the display circuit through a switch. The surge protection circuit with counting display can self-check the service life of the surge discharge element and prompt replacement of the surge discharge element.

Description

Surge Protector and surge protection circuit with display is counted

Technical field

The present invention relates to a kind of surge protection field, more particularly to a kind of Surge Protector and wave with display is counted Gush protection circuit.

Background technology

With computer technology, automatic control technology, the development of information technology, various forms of electronic systems application day Cumulative many, this system is widely used to industrial many departments and the sizable factory of scale complexity, due to these electronics The running voltage of system equipment is only several volts, and electric current the atmospheric electrical phenomena often having in nature and is answered in microampere to the milliampere order of magnitude Miscellaneous live interference signal is easy to cause loss of data, damages electronics system, causes whole control system interruption, factory The major accident of stopping production.

In order to prevent the interference of thunder and lightning, Surge Protector can be added in electronic system.And surge protection common at present Device cannot voluntarily detect the life-span, and cannot observe directly whether need replacing Surge Protector, while can be right when changing Original signal produces impact.

The content of the invention

The technical problem to be solved in the present invention is to provide a kind of life-span that can detect surge element, can point out needs Surge element is changed, and the band for affecting when changing, will not be produced on original signal and count the surge protection circuit for showing.

A kind of Surge Protector of application foregoing circuit is provided in addition with necessary.

To solve the above problems, the present invention provides a kind of surge protection circuit with display is counted, and the band is counted and shown Surge protection circuit include:

One-level discharge circuit, for thunder and lightning electricity of releasing;

Two-stage discharge circuit, for one-level discharge circuit residue residual voltage of releasing;

Electric-leakage detection circuit, for detecting whether two-stage discharge circuit leaks electricity;

Sampling counting circuit, for recording the number of times of releasing of one-level discharge circuit;

Central processing circuit, for processing the signal of telecommunication that sampling counting circuit and electric-leakage detection circuit transmission come;

Display circuit, central processing circuit are shown for the signal of telecommunication control display circuit sent according to sampling counting circuit The number of times of releasing of one-level discharge circuit, or the maximum times that can be released according to one-level discharge circuit judge whether need change simultaneously Show the code of the one-level discharge circuit that the needs are changed;The central processing circuit is additionally operable to reception electric-leakage detection circuit and is examined The signal of telecommunication whether the two-stage discharge circuit for measuring leaks electricity, and the electric leakage time control of two-stage discharge circuit is detected in electric-leakage detection circuit Display circuit processed shows the code of the two-stage discharge circuit of the electric leakage to point out the two-stage discharge circuit to need to change;

Base circuit, for distributing the size of one-level discharge circuit and the released thunder energy of two-stage discharge circuit;

Power circuit, for powering to sampling counting circuit, and by switch to central processing circuit, electric-leakage detection circuit And display circuit is powered.

Further, the base circuit includes that two are coordinated resistance R1, R2, and the one end and one-level for coordinating resistance R1 is discharged The first end of circuit and the electrical connection of input node S+, one end of the coordination resistance R2 and the second end of the one-level discharge circuit And input node S- is electrically connected, the other end of the coordination resistance R2 is electrically connected with the two-stage discharge circuit and output node P- Connect, the other end of the coordination resistance R1 is electrically connected with the two-stage discharge circuit and output node P+.

Further, the one-level discharge circuit includes at least one gas-discharge tube SA1, the gas-discharge tube SA1 First end and the second end electrically connect with base circuit, the 3rd end of the gas-discharge tube SA1 is by sampling counting circuit The armature winding ground connection of middle current transformer.

Further, the two-stage discharge circuit includes electric capacity C3, three sampling diode D2, D4, D5 and transient state suppression Diode D3 processed, one end of the electric capacity C3 are electrically connected with the anode of the sampling diode D2, the other end of the electric capacity C3 Electrically connect with the negative electrode of the sampling diode D2, and sample the negative electrode of diode D2 and electrically connect with electric-leakage detection circuit, it is described Sampling diode D4 negative electrode electrically connect with the anode of the sampling diode D5, the negative electrode of the sampling diode D5 with it is described The anode electrical connection of sampling diode D2, the anode of the sampling diode D4 are electrically connected with the negative electrode of the sampling diode D2 Connect, and the anode of the sampling diode D4 is electrically connected with the anode of the Transient Suppression Diode D3, the transient state suppresses two The negative electrode of pole pipe D3 is electrically connected with base circuit, and one end of the electric capacity C3 is electrically connected with the base circuit.

Further, the sampling counting circuit include current transformer T1, six resistance R14, R26, R8, R27, R10, R19, two electric capacity C4, C5, two cycling circuits and a chip ICs 1, the current transformer T1 secondary windings respectively with Two resistance R26, R14 are in parallel, and one end of the current transformer T1 secondary windings is also electrically connected with one end of resistance R8, described The other end of current transformer T1 secondary windings is electrically connected with one end of resistance R27;The current transformer T1 armature windings One end is electrically connected with one-level discharge circuit, the other end ground connection of the current transformer T1 armature windings;Described two resistance R8, The other end of R27 is connected to cycling circuit, and the outfan of two cycling circuits is electrically connected and is provided with signal in junction to be adopted Collection node, the node are electrically connected with the clock pins of chip IC 1, and the resistance R10 and electric capacity C4 are in parallel, and the resistance R10 One end electrically connect with the clock pins of the chip IC 1, the power supply in the other end of the resistance R10 and the power circuit Directly electrically connect, the reseting pin RST of the chip IC 1 connects reference ground, the reseting pin of the chip IC 1 by resistance R19 RST is electrically connected with power circuit by electric capacity C5, wherein nine output pin P1 to P9 of the chip IC 1 and the centre Reason circuit electrical connection.

Further, the cycling circuit includes that transient state suppresses Zener diode D8, three resistance R9, R11, R12, electric capacity C7 and audion Q3, the resistance R11 and electric capacity C7 are in parallel, and one end and the transient state of the resistance R11 suppress voltage stabilizing two The negative electrode electrical connection of pole pipe D8, the other end and the transient state of the resistance R11 suppress the anode of Zener diode D8 to electrically connect, described One end of resistance R11 is electrically connected with one end of resistance R12 by resistance R9, and the other end of the resistance R11 is another with resistance R12 One end electrically connects, and one end of the resistance R12 electrically connect with the base stage of the audion Q3, the emitter stage of the audion Q3 and The other end electrical connection of the resistance R12, the colelctor electrode of the audion Q3 are electrically connected with the clock pins of the chip IC 1.

Further, the electric-leakage detection circuit includes five resistance R3 to R6, R29, diode D6 and audion Q1, institute The one end for stating resistance R29 is electrically connected with the two-stage discharge circuit, the sun of the other end of the resistance R29 and the diode D6 The base stage electrical connection of pole and audion Q1, the negative electrode of the diode D6 are electrically connected with one end of the resistance R6, the resistance Another termination reference ground of R6;The colelctor electrode of the audion Q1 is electrically connected with central processing circuit by resistance R5, and described three The colelctor electrode of pole pipe Q1 is electrically connected with power circuit by resistance R4, the emitter stage of the audion Q1 and the one of the resistance R3 End electrical connection, another termination reference ground of the resistance R3.

Further, the central processing circuit include single-chip microcomputer U6, multiple energy-saving circuits, two electric capacity C13, C30 with And resistance R28;It is electrically connected by the electric capacity C30 between power pin DVCC and reference ground pin DVSS of the single-chip microcomputer U6 Connect, power pin DVCC is electrically connected with power circuit, the reference ground pin DVSS is electrically connected with reference ground;The monolithic The wherein four I/O pin P1.0 of machine U6, P1.1, P1.2, P1.3, input pin XIN, test data input pin TDO, test Clock output pin TCLK, test clock input pin TCK and test pattern base pin selection TMS are defeated with multiple energy-saving circuits Go out end and correspond electrical connection;The earth terminal of the plurality of energy-saving circuit is electrically connected with reference ground, the plurality of energy-saving circuit Input respectively with sampling counting circuit multiple outfans electrically connect;The reseting pin RST of the single-chip microcomputer U6 is by electricity Hold C13 and connect reference ground, and the reseting pin RST is electrically connected with power circuit by resistance R28;The single-chip microcomputer U6 is wherein Five I/O pins P2.0, P2.1, P2.2, P2.3, P2.4 are electrically connected with the display circuit;The single-chip microcomputer U6 is wherein One I/O pins P2.5 receives the signal of telecommunication that electric-leakage detection circuit transmission comes.

Further, each energy-saving circuit includes field effect transistor Q2 and resistance R18, the drain electrode of field effect transistor Q2 Electrically connected with power circuit by resistance R18, the grid of field effect transistor Q2 is electrically connected with outfan in sampling counting circuit, The source electrode of field effect transistor Q2 connects reference ground.

The present invention also provides a kind of Surge Protector,:The Surge Protector include upper shell, lower house, can self-inspection let out Surge module, display and the base of component life are put, the surge module is fixed in the upper casing body, institute State base to be fixed in the lower casing body, the surge module is electrically connected with base by inserting terminal, the display It is fixed in the surge module, and the display is electrically connected with the surge module.

The surge circuit that the present invention can pass through in surge module voluntarily detects the life-span of element of releasing, and will inspection Survey result to show by display, while when surge module is changed, base circuit can normal work, therefore will not Affect the transmission of original signal.

Description of the drawings

Fig. 1 is the structural representation of the better embodiment of Surge Protector of the present invention.

Fig. 2 is the circuit theory diagrams of better embodiment of the present invention with the surge protection circuit for showing is counted.

Fig. 3 is the schematic diagram of base circuit, one-level discharge circuit and two-stage discharge circuit.

Fig. 4 is the schematic diagram for sampling counting circuit.

Fig. 5 is the schematic diagram of electric-leakage detection circuit.

Fig. 6 is the schematic diagram of central processing circuit.

Fig. 7 is the schematic diagram of energy-saving circuit and power circuit.

Specific embodiment

The invention will be further described below in conjunction with the accompanying drawings.

As depicted in figs. 1 and 2, the better embodiment of Surge Protector of the present invention include upper shell 11, lower house 12, can Self-inspection is released surge module 13, display 15 and the base 14 of component life, and the surge module 13 is fixed on In the upper shell 11, the base 14 is fixed in the lower house 12, and the surge module 13 passes through inserting terminal Electrically connect with base 14, the display 15 is fixed in the surge module 13, and the display 15 and the wave Gush module 13 of releasing to electrically connect.

The base 14 is provided with the base circuit 2 for connecting signal input and export, and is provided with the display 15 Display circuit 9;The surge module 13 is provided with surge circuit, and the base circuit 2 is by the surge Circuit is electrically connected to form the surge protection circuit with display is counted with display circuit 9.The surge circuit includes:For letting out Put the one-level discharge circuit 3 of thunder and lightning electricity, the two-stage discharge circuit 4 for the remaining residual voltage of the one-level discharge circuit 3 of releasing, for examining Survey electric-leakage detection circuit 6 that whether two-stage discharge circuit 4 leak electricity, by detect one-level discharge circuit 3 release number of times sampling based on Number circuit 5, the central processing circuit 7 for processing the signal that sampling counting circuit 5 and electric-leakage detection circuit 6 send, display Circuit 9 and power circuit 8.

The two-stage discharge circuit 4 is electrically connected with one-level discharge circuit 3 by base circuit 2;The power circuit 8 is provided with Primary nodal point VCC and secondary nodal point VDD, the primary nodal point VCC are directly electrically connected with power supply, and the secondary nodal point VDD passes through Switch S1 and power electric connection, the power circuit 8 to sampling counting circuit 5, central processing circuit 7, electric-leakage detection circuit 6 with And display circuit 9 is powered, and sample counting circuit 5 directly and power electric connection, the switch S1 is used to controlling central authorities to process electricity Road 7, electric-leakage detection circuit 6 and display circuit 9, i.e. 5 primary nodal point VCC of sampling counting circuit electrical connections, the central authorities Process circuit 7, electric-leakage detection circuit 6 and display circuit 9 are electrically connected with secondary nodal point VDD.

As shown in figure 3, the base circuit 2 includes that two are coordinated resistance R1, R2, one end of described coordination electricity group R1, R2 Signal input node is equipped with, the other end of described coordination resistance R1, R2 is equipped with signal output node, coordinates the one of resistance R1 End is electrically connected with the first end and input node S+ of one-level discharge circuit 3, and one end of the coordination resistance R2 is put with the one-level Second end of circuit 3 and the electrical connection of input node S-, the other end and the two-stage discharge circuit 4 of the coordination resistance R2 Input and output node P- electrical connections, the other end of coordination resistance R1 and the outfan of the two-stage discharge circuit 4 and Output node P+ is electrically connected.

The one-level discharge circuit 3 be gas-discharge tube SA1, first end and the coordination of the gas-discharge tube SA1 One end electrical connection of resistance R1, second end of the gas-discharge tube SA1 are electrically connected with the one end for coordinating resistance R2, the gas 3rd end of discharge tube SA1 is electrically connected with the current transformer in sampling counting circuit.When applied voltage increases above gas In discharge tube SA1 during the dielectric strength of gas, discharge breakdown is converted into conduction by original state of insulation by the gap of two interpolars State, the voltage after conducting between each pole of discharge tube maintain the residual voltage level for putting that electric arc channel is determined, therefore can play restriction Overvoltage and release Lightning Transient overcurrent effect, can protection circuit be not struck by lightning.Certainly, in other embodiments, One-level discharge circuit 3 can be two or more gas-discharge tubes SA1.

The two-stage discharge circuit 4 includes electric capacity C3, three sampling diode D2, D4, D5 and Transient Suppression Diode D3, one end of the electric capacity C3 are electrically connected with the anode of the sampling diode D2, and the other end of the electric capacity C3 is taken with described The negative electrode of sample diode D2 is electrically connected, and the negative electrode of sampling diode D2 is electrically connected with electric-leakage detection circuit 6, two poles of the sampling The negative electrode of pipe D4 is electrically connected with the anode of the sampling diode D5, the negative electrode of the sampling diode D5 and it is described sampling two poles The anode electrical connection of pipe D2, the anode of the sampling diode D4 are electrically connected with the negative electrode of the sampling diode D2, and described The anode of sampling diode D4 is electrically connected with the anode of the Transient Suppression Diode D3, the moon of the Transient Suppression Diode D3 Pole is electrically connected with the other end of the resistance R1 of base circuit 2, and one end of the electric capacity R3 is with the resistance R2's of the base circuit 2 The other end is electrically connected.The two-stage discharge circuit 4 is that the residual voltage that one-level discharge circuit 3 is stayed is discharged, and which is mainly line Electric discharge between line.When moment suppressing the two poles of the earth of diode D3 to be subject to transient state high energy impact events, it can be with 10 minus 12 power The high impedance of its two interpolar is changed into Low ESR by the speed of second-time, is absorbed up to thousands of watts of surge power, is made two interpolars Voltage clamp effectively protects the precision components in electronic circuit, from the damage of various surge pulses in a predetermined value.

As shown in figure 4, the sampling counting circuit 5 include current transformer T1, six resistance R14, R26, R8, R27, R10, R19, two electric capacity C4, C5, two cycling circuits 51 and a chip ICs 1.The present embodiment chips IC1 are adopted CD4040BCM, can also adopt other substitute the model of the chip IC 1 in other embodiments, such as CD4060, More than the ten low-power consumption binary system serial counters such as CD4020.

The current transformer T1 secondary windings are in parallel with two resistance R26, R14, T1 level of the current transformer around One end of group is also electrically connected with one end of resistance R8, the other end of the current transformer T1 secondary windings and the one of resistance R27 End electrical connection;One end of the current transformer T armature windings is electrically connected with the 3rd end of one-level discharge circuit 3, i.e., gas is put 3rd end of fulgurite SA1, the other end ground connection of the current transformer T1 armature windings.Described two resistance R8, R27's is another End is connected with cycling circuit 51 by two and electrically connects, and signals collecting node is provided between described two cycling circuits 51, and should Acquisition node is electrically connected with the clock pins of chip IC 1, and the resistance R10 and electric capacity C4 are in parallel, and one end of the resistance R10 Electrically connect with the clock pins of the chip IC 1, the other end of the resistance R10 is direct with the power supply in the power circuit 8 Electrical connection, the reseting pin RST of the chip IC 1 connect reference ground, the reseting pin of the chip IC 1 by the 4th resistance R19 RST connects the primary nodal point of power circuit by electric capacity C5.Wherein nine output pin P1 to P9 of the chip IC 1 with it is described in Centre process circuit 7 is electrically connected.

Each cycling circuit 51 includes that transient state suppresses Zener diode D8, three resistance R9, R11, R12, electric capacity C7 And an audion Q3.The resistance R11 and electric capacity C7 are in parallel, and one end and the transient state of the resistance R11 suppress two pole of voltage stabilizing The negative electrode electrical connection of pipe D8, the other end and the transient state of the resistance R11 suppress the anode of Zener diode D8 to electrically connect, the electricity One end of resistance R11 is electrically connected with one end of resistance R12 by resistance R9, and the other end of the resistance R11 is another with resistance R12 End electrical connection, one end of the resistance R12 electrically connected with the base stage of the audion Q3, the emitter stage of the audion Q3 and institute The other end electrical connection of resistance R12 is stated, the colelctor electrode of the audion Q3 is electrically connected with the clock pins CLK of the chip IC 1.

When gas-discharge tube SA1 releases thunder and lightning, the secondary of current transformer T1 can produce electric current so as in signals collecting Node produces a low level pulse, and chip IC 1 records the pulse signal, and chip IC 1 often receives pulsatile once signal and lets out Put number of times to be increased by once, while number of times of releasing is sent to central processing circuit 7 by signal.Electric current when released because of which every time The sense of current that T1 level of transformer is produced is possible to different, therefore arranges two cycling circuits 51 and release every time all with being ensured Can record, accurately the number of times of releasing of detected gas discharge tube SA1.

As shown in figure 5, the electric-leakage detection circuit 6 includes five resistance R3 to R6, R29, diode D6 and audion Q1, One end of the resistance R29 is electrically connected with the negative electrode that diode D2 is sampled in the two-stage discharge circuit 4, the resistance R29's The other end is electrically connected with the base stage of the anode and audion Q1 of the diode D6, negative electrode and the resistance of the diode D6 One end electrical connection of R6, another termination reference ground of the resistance R6;The colelctor electrode of the audion Q1 is by resistance R5 with Centre process circuit 7 is electrically connected, and the colelctor electrode of the audion Q1 is electrically connected with the secondary nodal point VDD of power circuit 8 by resistance R4 Connect, emitter stage one end of the audion Q1 is electrically connected with one end of the resistance R3, another termination reference of the resistance R3 Ground.Current potential at the negative pole of the diode D4 is 0 under normal circumstances, the diode when the transient diode D3 leaks electricity Current potential at the negative electrode of D4 can be raised with the increase that transient diode D3 leaks electricity, and when set-point is reached, audion Q1 leads It is logical, the colelctor electrode output low level of audion Q1.

Refer to Fig. 6, the central processing circuit 7 include single-chip microcomputer U6,71, two electric capacity C13 of multiple energy-saving circuits, C30 and resistance R28.In the present embodiment, single-chip microcomputer U6 adopts MSP430G2332, can also adopt which in other embodiments He can substitute the model of the single-chip microcomputer, such as ADUC7060, PIC16F616,80C51 etc..

Electrically connected by the electric capacity C30 between power pin DVCC of the single-chip microcomputer U6 and reference ground pin DVSS, Power pin DVCC is electrically connected with power circuit 8 with receiving voltage VDD, and the reference ground pin DVSS is electrically connected with reference ground Connect.The wherein four I/O pin P1.0 of the single-chip microcomputer U6, P1.1, P1.2, P1.3, input pin XIN, test data input Pin TDO, test clock output pin TCLK, test clock input pin TCK and test pattern base pin selection TMS with it is multiple The outfan of energy-saving circuit 71 corresponds electrical connection, and the earth terminal of the plurality of energy-saving circuit 71 is electrically connected with reference ground, The input of the plurality of energy-saving circuit 71 is electrically connected with the output interface of sampling 5 chips IC1 of counting circuit respectively.The list The reseting pin RST of piece machine U6 connects reference ground by electric capacity C13, and the reseting pin RST passes through resistance R28 and power circuit 8 electrical connections.Wherein five I/O pins P2.0, P2.1, P2.2, P2.3, P2.4 of the single-chip microcomputer U6 with the display circuit 9 electrical connections;The tenth pin P2.5 of the single-chip microcomputer U6 is electrically connected with the resistance R5 in electric-leakage detection circuit 6.

Fig. 7 is refer to, each energy-saving circuit 71 includes field effect transistor Q2 and resistance R18, field effect transistor Q2 Drain electrode is electrically connected with power circuit 8 by resistance R18, grid and sampling 5 chips IC1 of counting circuit of field effect transistor Q2 Output interface electrical connection, the source electrode of field effect transistor Q2 connects reference ground.By power circuit 8 it can be seen that power supply is by battery There is provided, switch S1 and be typically under off-state, therefore general state the sampling counting circuit work to take power for there was only low-power consumption, its If the low and high level of 1 output pin Q1-Q9 of chip IC outputs is directly electrically connected with single-chip microcomputer U1, whether single-chip microcomputer works all Electric current can be produced makes shorter battery life, and metal-oxide-semiconductor field effect transistor is voltage control device, in the electricity that metal-oxide-semiconductor field effect transistor can bear Pressure scope inner grid and source electrode will not produce electric current, therefore arrange containing field effect transistor Q2 between chip IC 1 and single-chip microcomputer U6 Energy-saving circuit 71, so as to extend the service life of battery.

Because the display circuit 9 is existing conventional techniques, therefore will not be described here.

Specifically, when gas-discharge tube SA1 releases thunder and lightning electricity, in sampling counting circuit 5, electric current, chip are produced IC1 clock pins CLK will receive low level pulse, often receive pulsatile once signal, and chip IC 1 is increased by once letting out Record is put, sampling counting circuit 5 sends the signal of number of times of releasing to single-chip microcomputer U6, single-chip microcomputer U6 process when switch S1 is pressed After receiving the signal of the transmission of chip IC 1, display circuit after signal is changed, is sent to, which is let out finally to show screen display The numerical value put, when numerical value reaches the first preset value, display 15 shows replace, represents that surge module 13 needs more Change, when numerical value reaches the first preset value, display 15 shows fail, represent that 13 failure of surge module can not work and need to stand Change.Electric-leakage detection circuit 6 sends voltage signal, when its voltage signal is more than three preset values, monolithic to single-chip microcomputer U6 Machine U6 control display 15 is shown as replace, when its voltage signal is more than four preset values, single-chip microcomputer U6 control display 15 are shown as fail.When changing surge module 13, as base circuit 2 is not disposed in surge module 13, therefore The circuit of its signal transmission is not interfered with when changing.To be kept for the working time of detection work longer, therefore in power circuit 8 It is middle that switch S1 is set, it is ensured that under the normal operation of sampling count detection circuit 5, to save power supply to greatest extent.

Release number of times of the present invention by detected gas discharge tube SA1, carrys out the life-span of detected gas discharge tube SA1, passes through Whether detection transient diode D3 leaks electricity, and detects whether transient diode D3 damages, with self-checking function, while changing wave Gush.

Embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using the present invention The equivalent structure made by description and accompanying drawing content, is directly or indirectly used in other related technical fields, in the same manner at this Within the scope of patent protection of invention.

Claims (9)

1. it is a kind of with count show surge protection circuit, it is characterised in that:The surge protection circuit bag with display is counted Include:
One-level discharge circuit, for thunder and lightning electricity of releasing;
Two-stage discharge circuit, for one-level discharge circuit residue residual voltage of releasing;
Electric-leakage detection circuit, for detecting whether two-stage discharge circuit leaks electricity;
Sampling counting circuit, for recording the number of times of releasing of one-level discharge circuit;
Central processing circuit, for processing the signal of telecommunication that sampling counting circuit and electric-leakage detection circuit transmission come;
Display circuit, central processing circuit show one-level for the signal of telecommunication control display circuit sent according to sampling counting circuit The number of times of releasing of discharge circuit, or the maximum times that can be released according to one-level discharge circuit judge whether that needs are changed and are shown The code of the one-level discharge circuit that the needs are changed;The central processing circuit is additionally operable to receive detected by electric-leakage detection circuit The signal of telecommunication that whether leaks electricity of two-stage discharge circuit, and it is aobvious to detect control when two-stage discharge circuit leaks electricity in electric-leakage detection circuit Show that circuit shows the code of the two-stage discharge circuit of the electric leakage to point out the two-stage discharge circuit to need to change;
Base circuit, for distributing the size of one-level discharge circuit and the released thunder energy of two-stage discharge circuit;
Power circuit, for sampling counting circuit power, and by switch to central processing circuit, electric-leakage detection circuit and Display circuit is powered.
2. the surge protection circuit for showing with counting as claimed in claim 1, it is characterised in that:The base circuit includes two Individual to coordinate resistance R1, R2, the one end for coordinating resistance R1 is electrically connected with the first end and input node S+ of one-level discharge circuit, described Coordinate one end of resistance R2 to electrically connect with the second end of the one-level discharge circuit and input node S-, the coordination resistance R2's The other end is electrically connected with the two-stage discharge circuit and output node P-, and the other end of the coordination resistance R1 is put with described two grades Circuit and output node P+ electrical connections.
3. the surge protection circuit for showing with counting as claimed in claim 1, it is characterised in that:The one-level discharge circuit bag At least one gas-discharge tube SA1 is included, the first end of the gas-discharge tube SA1 and the second end are electrically connected with base circuit, 3rd end of the gas-discharge tube SA1 is grounded by sampling the armature winding of current transformer in counting circuit.
4. the surge protection circuit for showing with counting as claimed in claim 1, it is characterised in that:The two-stage discharge circuit bag Electric capacity C3, three sampling diode D2, D4, D5 and Transient Suppression Diode D3 are included, one end of the electric capacity C3 is taken with described The anode electrical connection of sample diode D2, the other end of the electric capacity C3 is electrically connected with the negative electrode of the sampling diode D2, and is taken The negative electrode of sample diode D2 is electrically connected with electric-leakage detection circuit, the negative electrode of the sampling diode D4 and the sampling diode D5 Anode electrical connection, the negative electrode of the sampling diode D5 electrically connected with the anode of the sampling diode D2, described to sample two The anode of pole pipe D4 is electrically connected with the negative electrode of the sampling diode D2, and the anode and the transient state of the sampling diode D4 The anode electrical connection of diode D3, the negative electrode of the Transient Suppression Diode D3 is suppressed to electrically connect with base circuit, the electric capacity One end of C3 is electrically connected with the base circuit.
5. the surge protection circuit for showing with counting as claimed in claim 1, it is characterised in that:The sampling counting circuit bag Include current transformer T1, six resistance R14, R26, R8, R27, R10, R19, two electric capacity C4, C5, two cycling circuits and One chip IC 1, the current transformer T1 secondary windings are in parallel with two resistance R26, R14 respectively, the current transformer One end of T1 secondary windings is also electrically connected with one end of resistance R8, the other end and resistance of the current transformer T1 secondary windings One end electrical connection of R27;One end of the current transformer T1 armature windings is electrically connected with one-level discharge circuit, and the electric current is mutual The other end ground connection of sensor T1 armature windings;The other end of described two resistance R8, R27 is connected to cycling circuit, two The outfan of cycling circuit is electrically connected and is provided with signals collecting node in junction, and the node is electric with the clock pins of chip IC 1 Connection, the resistance R10 and electric capacity C4 are in parallel, and one end of the resistance R10 is electrically connected with the clock pins of the chip IC 1 Connect, the other end of the resistance R10 is directly electrically connected with the power supply in the power circuit, the reseting pin of the chip IC 1 RST connects reference ground by resistance R19, and the reseting pin RST of the chip IC 1 is electrically connected with power circuit by electric capacity C5, institute Wherein nine output pin P1 to P9 for stating chip IC 1 are electrically connected with the central processing circuit.
6. the surge protection circuit for showing with counting as claimed in claim 5, it is characterised in that:The cycling circuit includes wink State suppresses Zener diode D8, three resistance R9, R11, R12, electric capacity C7 and an audion Q3, the resistance R11 and electricity C7 is in parallel for appearance, and one end of the resistance R11 and transient state suppress the negative electrode of Zener diode D8 to electrically connect, and the resistance R11's is another One end suppresses the anode of Zener diode D8 to electrically connect with transient state, and one end of the resistance R11 is by resistance R9 and resistance R12's One end electrically connects, and the other end of the resistance R11 electrically connected with the other end of resistance R12, one end of the resistance R12 with it is described The base stage electrical connection of audion Q3, the emitter stage of the audion Q3 are electrically connected with the other end of the resistance R12, three pole The colelctor electrode of pipe Q3 is electrically connected with the clock pins of the chip IC 1.
7. the surge protection circuit for showing with counting as claimed in claim 1, it is characterised in that:The electric-leakage detection circuit bag Include five resistance R3 to R6, R29, diode D6 and audion Q1, one end of the resistance R29 and two-stage discharge circuit electricity Connection, the other end of the resistance R29 are electrically connected with the base stage of the anode and audion Q1 of the diode D6, the diode The negative electrode of D6 is electrically connected with one end of the resistance R6, another termination reference ground of the resistance R6;The collection of the audion Q1 Electrode is electrically connected with central processing circuit by resistance R5, and the colelctor electrode of the audion Q1 is by resistance R4 and power circuit electricity Connection, the emitter stage of the audion Q1 are electrically connected with one end of the resistance R3, another termination reference ground of the resistance R3.
8. the surge protection circuit for showing with counting as claimed in claim 1, it is characterised in that:The central processing circuit bag Include single-chip microcomputer U6, multiple energy-saving circuits, two electric capacity C13, C30 and resistance R28;Power pin DVCC of the single-chip microcomputer U6 Electrically connected by the electric capacity C30 between reference ground pin DVSS, power pin DVCC is electrically connected with power circuit, institute State reference ground pin DVSS to electrically connect with reference ground;The wherein four I/O pin P1.0 of the single-chip microcomputer U6, P1.1, P1.2, P1.3, input pin XIN, test data input pin TDO, test clock output pin TCLK, test clock input pin TCK And test pattern base pin selection TMS is corresponded with the outfan of multiple energy-saving circuits and is electrically connected;The plurality of energy-saving circuit Earth terminal electrically connect with reference ground, the multiple outputs respectively with sampling counting circuit of the input of the plurality of energy-saving circuit End electrical connection;The reseting pin RST of the single-chip microcomputer U6 connects reference ground, and the reseting pin RST by electricity by electric capacity C13 Resistance R28 is electrically connected with power circuit;Wherein five I/O pin P2.0, P2.1, P2.2, P2.3, P2.4 of the single-chip microcomputer U6 are equal Electrically connect with the display circuit;One of I/O pins P2.5 of the single-chip microcomputer U6 receives electric-leakage detection circuit transmission to be come The signal of telecommunication.
9. the surge protection circuit for showing with counting as claimed in claim 8, it is characterised in that:Each energy-saving circuit bag Field effect transistor Q2 and resistance R18 are included, the drain electrode of field effect transistor Q2 is electrically connected with power circuit by resistance R18, the field The grid of effect pipe Q2 is electrically connected with outfan in sampling counting circuit, and the source electrode of field effect transistor Q2 connects reference ground.
CN201410401771.1A 2014-08-14 2014-08-14 Surge protector and surge protection circuit with counting display CN104158165B (en)

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Publication number Priority date Publication date Assignee Title
CN105720568B (en) * 2016-04-13 2018-02-02 重庆正博仪器工业有限公司 A kind of tape lifetime Autonomous test and the live Surge Protector being conveniently replaceable
CN108683170B (en) * 2018-06-11 2019-06-18 重庆正博仪器工业有限公司 Surge protection circuit with failure anticipation function

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743999A (en) * 1987-02-13 1988-05-10 Curtis Manufacturing Company, Inc. Rotary telephone line surge protector and system
CN1744406A (en) * 2005-06-27 2006-03-08 孙巍巍 On-line integral pluggable signal circuit surge protector
CN101394083A (en) * 2007-09-20 2009-03-25 孙巍巍 Surge protector having novel mounting mode
CN102798786A (en) * 2012-09-10 2012-11-28 天津协盛闪宁科技有限公司 Universal intelligent lightning protection monitoring module and method
JP2014099276A (en) * 2012-11-13 2014-05-29 Sankosha Corp Surge protection device for communication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743999A (en) * 1987-02-13 1988-05-10 Curtis Manufacturing Company, Inc. Rotary telephone line surge protector and system
CN1744406A (en) * 2005-06-27 2006-03-08 孙巍巍 On-line integral pluggable signal circuit surge protector
CN101394083A (en) * 2007-09-20 2009-03-25 孙巍巍 Surge protector having novel mounting mode
CN102798786A (en) * 2012-09-10 2012-11-28 天津协盛闪宁科技有限公司 Universal intelligent lightning protection monitoring module and method
JP2014099276A (en) * 2012-11-13 2014-05-29 Sankosha Corp Surge protection device for communication

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