CN103207331A

CN103207331A - System and method for monitoring damaged on-off quantity of surge protection device and ground resistance online in real time

Info

Publication number: CN103207331A
Application number: CN201310078506XA
Authority: CN
Inventors: 王予平; 张长生; 徐连海; 潘云洪; 陆挺; 吴旺生; 陈志雄
Original assignee: China Railway Signal and Communication Shanghai Engineering Co Ltd
Current assignee: China Railway Signal and Communication Shanghai Engineering Bureau Group Co Ltd
Priority date: 2013-03-12
Filing date: 2013-03-12
Publication date: 2013-07-17
Anticipated expiration: 2033-03-12
Also published as: CN103207331B

Abstract

The invention discloses a system and method for monitoring damaged on-off quantity of a surge protection device and ground resistance online in the real time. A measuring system comprises a server, one or a plurality of remote monitoring terminals and one or a plurality of data collecting systems. The server is respectively connected with various remote monitoring terminals and all data collecting systems. Each data collecting system comprises a damaged on-off quantity data collecting module and a ground resistance collecting module. Each damaged on-off quantity data collecting module comprises m row-connecting lines and n line-connecting lines. Each ground resistance collecting module comprises a micro-processor module, a constant current source injection module, a sampling voltage reading module and a ground resistance measuring software module. The micro-processor modules are connected with the constant current injection modules, the sampling voltage reading modules and the ground resistance measuring software modules respectively. The system and method can guarantee effective judgment of damaged on-off quantity of all surge protection devices and simultaneously can measure the ground resistance in the real time precisely. The system and method is especially suitable for railway signal lightning protection.

Description

Switching value and stake resistance real time on-line monitoring system and method that lightning protection device damages

Technical field

The invention belongs to the electronic communication technology field, relate to a kind of on-line monitoring system, relate in particular to switching value and stake resistance real time on-line monitoring system that a kind of lightning protection device damages; Simultaneously, the invention still further relates to switching value and the stake resistance realtime on-line monitoring method that a kind of lightning protection device damages.

Background technology

Lightning protection device comprises lightning protection for power supply and siganl thunder-proof device, and lightning protection device also claims lightning arrester, Surge Protector, surge protector (Surge Protection Devices is called for short SPD), overvoltage protection device.Lightning protection device is to prevent from being widely used in communication field, power domain by the equipment in being struck by lightning by modern electricity and other technology, obtains everybody great attention.

Be provided with some switching values in the lightning protection device, inner clean and tidy in order to make lightning protection device, switching value adopts matrix form to arrange usually, as the switching value of the capable n row of m is set in the lightning protection device.Existing lightning protection device on-off value data acquisition mode is that connection cable is connected each switching value respectively, then judges according to each circuit is whether unimpeded whether each switching value has fault.Usually need m*n bar cable, the wiring in the lightning protection device seems and brings a lot of inconvenience in the time of can or safeguarding to wiring usually by in disorder no chapter.

Simultaneously, the connecting line that connects switching value can think to have only one, and the connecting line of each switching value is irrelevant mutually; If the fault of circuit self, then have no idea to know circuit self fault, still be that lightning protection device breaks down.

In addition, buildings and electronic equipment ground connection are extremely important.Buildings ground connection is good, people and thing in the protection buildings that can be to a great extent; If also ground connection is good for the electronic equipment in the buildings; just can dwindle the potential difference (PD) between electronic equipment casing and the earth; potential difference (PD) hour; may not can produce induced voltage; thereby can not produce displacement current; the electron device of electronic equipment internal can be not breakdown because of the discharge of thundering, thereby play the effect of protection electronic equipment.

Whether buildings and electronic equipment ground connection is good, is to embody by stake resistance.If stake resistance is higher, then ground connection is relatively poor; Otherwise stake resistance is little, and then ground connection is good.

Ground resistance measuring instrument is exactly the instrument of a kind of special measurement buildings and electronic equipment grounding resistance.Mainly contain two class ground resistance measuring instruments in the market:

1) hand-rail type ground resistance table: it is a kind of comparatively traditional measurement instrument, and ultimate principle is to adopt three point voltage drop methods.This instrument needs 3 must not of being in line of measured resistance and two auxiliary earth utmost points parallel with the overhead transmission line of metallic conduit or vicinity when measuring; Tested earthing pole also should disconnect with equipment when measuring.This kind instrument benefit is the quantity regardless of earth point, and single-point grounding or multipoint earthing can be measured, and shortcoming is to need subsidiary ground.

2) hinder table: hinder table is a kind of survey instrument of novelty pincerlikely, and it is convenient, fast, exactly likes clamp on amperemeter pincerlikely, do not need the subtest stake during measurement, only need to obtain measurement result, the resistance surveying work toward by a folder on the geodesic line with being very easy to.This kind instrument benefit is not need subsidiary ground, the measuring process simple and fast, and shortcoming is to measure 2 above earth points, can't measure the single-point grounding point.

Summary of the invention

Technical matters to be solved by this invention is: the switching value and the stake resistance real time on-line monitoring system that provide a kind of lightning protection device to damage, can guarantee effective judgement of the switching value that each lightning protection device damages, and can accurately record stake resistance by real-time online simultaneously.

In addition, switching value and stake resistance realtime on-line monitoring method that the present invention also provides a kind of lightning protection device to damage can guarantee effective judgement of the switching value that each lightning protection device damages, and can accurately record stake resistance by real-time online simultaneously.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

Switching value and stake resistance real time on-line monitoring system that a kind of lightning protection device damages, it is characterized in that, described measuring system comprises: server, one or more remote monitoring terminal, one or more data acquisition system (DAS), described server connect each remote monitoring terminal and each data acquisition system (DAS) respectively;

Described data acquisition system (DAS) comprises damages on-off value data acquisition module, stake resistance acquisition module, data processing module, display module, and data processing module connects damage on-off value data acquisition module, stake resistance acquisition module, display module respectively;

Lightning protection device comprises that the capable n row of m are the switching value that matrix form is arranged; Switching value D _AbBe defined as the capable b row of a switching value; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n];

Described damage on-off value data acquisition module comprises m capable connecting line, a n row connecting line, i capable connecting line K _iFirst port that connects the capable n of an i switching value, j row connecting line I _jSecond port that connects m switching value of j row; Simultaneously, i capable connecting line K _iOr j row connecting line I _jFirst diode by correspondence connects switching value D _IjCorresponding port; Wherein, i, j are integer, i ∈ [1, m], j ∈ [1, n];

Described damage on-off value data acquisition module comprises that also m*n is the circuit self-checking circuit that matrix form is arranged, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jThe direction that first diode that second diode is corresponding with it arranges is opposite;

Described damage on-off value data acquisition module comprises line fault selftest module, lightning protection device fault scanning module;

Described line fault selftest module is in order to detect the circuit faults itself; The line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to noble potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if having electronegative potential to occur in m capable connecting line _iWith j current row connecting line I _jBetween the intersection region line fault appears;

Perhaps, described line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a capable connecting line K in m the capable connecting line then successively _iCurrent potential be set to noble potential; If the circuit non-fault, the current potential of n row connecting line should be height; This moment, then current potential was j low row connecting line I if having electronegative potential to occur in n row connecting line _jWith i current capable connecting line K _iBetween the intersection region line fault appears;

Described lightning protection device fault scanning module is in order to detect the lightning protection device fault; The current potential of m capable connecting line and n row connecting line all is set to noble potential; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if m capable connecting line has electronegative potential to occur _iWith j current row connecting line I _jBetween the intersection region lightning protection device fault appears;

Perhaps, described lightning protection device fault scanning module all is set to noble potential with the current potential of m capable connecting line and n row connecting line; Make a capable connecting line K in m the capable connecting line then successively _iCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of n row connecting line should be height; This moment, then current potential was j low row connecting line I if n row connecting line has electronegative potential to occur _jWith i current capable connecting line K _iBetween the intersection region lightning protection device fault appears;

Described stake resistance acquisition module comprises: microprocessor module, constant current source injection module, sampled voltage read module, grounding resistance measurement software module; Described microprocessor module connects constant current source injection module, sampled voltage read module, grounding resistance measurement software module respectively;

Described constant current source injection module provides constant current source or closes constant current source under the control of microprocessor module;

Described sampled voltage read module is accepted the control of microprocessor module, measures sampled voltage;

Described grounding resistance measurement software module is accepted the control of microprocessor module, and the sampled voltage that measures according to described sampled voltage read module calculates stake resistance;

Whether normally described display unit handles back each switching value of lightning protection device information in order to show through data processing module, also in order to show the information of the ground wire ground resistance that described stake resistance acquisition module is gathered.

Switching value and stake resistance real time on-line monitoring system that a kind of lightning protection device damages, described measuring system comprises: server, one or more remote monitoring terminal, one or more data acquisition system (DAS), described server connect each remote monitoring terminal and each data acquisition system (DAS) respectively;

Described data acquisition system (DAS) comprises damages on-off value data acquisition module, stake resistance acquisition module;

Lightning protection device comprises the capable switching value of m, altogether s switching value; The quantity of every capable switching value is identical or different, and in each row switching value, delegation's switching value comprises n switching value at most; Switching value D _AbBe defined as the capable b row of a switching value; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n];

Described damage on-off value data acquisition module comprises m capable connecting line, a n row connecting line, switching value D _IjTwo ends respectively with i capable connecting line K _iAnd j row connecting line I _jConnect; Simultaneously, i capable connecting line K _iOr j row connecting line I _jFirst diode by correspondence connects switching value D _IjCorresponding port; Wherein, i, j are integer, i ∈ [1, m], j ∈ [1, n];

Described damage on-off value data acquisition module comprises lightning protection device fault scanning module;

Described grounding resistance measurement software module is accepted the control of microprocessor module, and the sampled voltage that measures according to described sampled voltage read module calculates stake resistance.

As a preferred embodiment of the present invention, described damage on-off value data acquisition module also comprises s circuit self-checking circuit, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jThe direction that first diode that second diode is corresponding with it arranges is opposite;

Described damage on-off value data acquisition module comprises the line fault selftest module, in order to the circuit faults itself is detected; The line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to noble potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if having electronegative potential to occur in m capable connecting line _iWith j current row connecting line I _jBetween the intersection region line fault appears;

Perhaps, described line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a capable connecting line K in m the capable connecting line then successively _iCurrent potential be set to noble potential; If the circuit non-fault, the current potential of n row connecting line should be height; This moment, then current potential was j low row connecting line I if having electronegative potential to occur in n row connecting line _jWith i current capable connecting line K _iBetween the intersection region line fault appears.

As a preferred embodiment of the present invention, described microprocessor module specifically comprises:

The constant current source control module is in order to control constant current source injection module injection constant current source electric current I or the constant current source electric current I is closed;

Interference source is gathered control module, measures interference source voltage in order to control the interference source acquisition module;

First judging unit is in order to judge that whether interference source voltage that the interference source acquisition module measures is greater than setting value V10;

The sampled voltage measure-controlling unit is measured sampled voltage in order to control described sampled voltage read module;

The interference source processing and control element (PCE), in order to the moving reference power supply, make sampled voltage low ebb between 0 and ε between, wherein ε is for setting minimal value;

The grounding resistance measurement control module calculates stake resistance in order to control described grounding resistance measurement software module; Described grounding resistance measurement software module is at first obtained under the situation of not injecting constant current source, the interference source voltage V that described sampled voltage read module measures _G1And the sampled voltage V of described sampled voltage read module measurement _Q1Then obtain under the situation of injecting constant current source the interference source voltage V that described sampled voltage read module measures _G2With sampled voltage V _Q2Then calculate efficiently sampling voltage V _q, V _q=V _Q1-V _Q2Then calculate stake resistance R _d, R _d=V _q÷ I;

Auxiliary current electrode resistance measure-controlling unit calculates the auxiliary current electrode resistance in order to control an auxiliary current electrode resistance measurement module; Auxiliary current electrode resistance measurement module calculates interference source voltage V _g, V _g=V _G1-V _G2; Then calculate auxiliary current electrode resistance R _z, R _z=V _g÷ I-R _d

As a preferred embodiment of the present invention, described measuring system also comprises power management module, and described power management module comprises:

-power protecting circuit adopts Transient Suppression Diode D1 in parallel and series connection insurance resistance F1, prevents overvoltage and thunderbolt;

-the one DC/DC conversion control circuit adopts first integrated circuit (IC) 1 to realize the pin Vss1 of first integrated circuit (IC) 1 and pin Cv1 ground connection, generation+7v voltage;

-the two DC/DC conversion control circuit adopts second integrated circuit (IC) 2 to realize that pin Vss2 and the pin Cv2 of second integrated circuit (IC) 2 are earth-free, generation-5v voltage;

-three-terminal voltage-stabilizing circuit adopts the 3rd integrated circuit U3 to realize generation+5v voltage;

Described constant current source injection module comprises:

-constant current source on-off circuit adopts the second triode Q2 and the 3rd triode Q3 design on-off circuit;

-operational amplification circuit adopts the first operational amplifier U4A to produce constant voltage circuit, guarantees the stable of electric current;

-current stabilizing circuit adopts the 5th triode Q5 design, and cut-off state does not produce constant current source, and conducting state is the stable also output state that produces of constant current source;

-negative level suppresses circuit, adopts Transient Suppression Diode D2, D3 to constitute negative level and suppresses circuit;

Described interference source acquisition module comprises:

-voltage follower circuit adopts the second operational amplifier U4B to produce constant voltage circuit, supplies the control chip U2 of microprocessor module to read interference source voltage at pin ZGL place;

-interference source Acquisition Circuit comprises that resistance R 28, resistance R 38, capacitor C 15 constitute the interference source Acquisition Circuit, are incorporated into the second operational amplifier U4B with interference source;

Described sampled voltage read module comprises:

-operational amplification circuit adopts the 3rd operational amplifier U5A to amplify, and improves measurement sensitivity and the accuracy of the control chip U2 of microprocessor module;

-large power, electrically resistance circuit adopts 4 resistance and string mode also to form a high-power resistance, improves the serviceable life of resistance;

-range driving switch circuit adopts metal-oxide-semiconductor Q4 to remove to read sample voltage, carries out the control of range gear.

Switching value and stake resistance realtime on-line monitoring method that a kind of above-mentioned lightning protection device damages, described method comprises the switch acquisition step that lightning protection device damages, and comprising:

M capable connecting line, a n row connecting line of described damage on-off value data acquisition module are matrix form arrangement, i capable connecting line K _iOr j row connecting line I _jFirst diode by correspondence connects switching value D _IjCorresponding port; Wherein, i, j are integer, i ∈ [1, m], j ∈ [1, n];

Described lightning protection device fault scanning module detects the lightning protection device fault; The current potential of m capable connecting line and n row connecting line all is set to noble potential; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if m capable connecting line has electronegative potential to occur _iWith j current row connecting line I _jBetween the intersection region lightning protection device fault appears;

Described method comprises the grounding resistance measurement step, comprising:

The constant current source injection module provides constant current source or closes constant current source under the control of microprocessor module;

The sampled voltage read module is accepted the control of microprocessor module, measures sampled voltage;

The grounding resistance measurement software module is accepted the control of microprocessor module, and the sampled voltage that measures according to described sampled voltage read module calculates stake resistance.

As a preferred embodiment of the present invention, described damage on-off value data acquisition module also comprises s circuit self-checking circuit, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jDescribed damage on-off value data acquisition module also comprises the line fault selftest module; The direction that first diode that second diode is corresponding with it arranges is opposite;

The switch acquisition step that described lightning protection device damages further comprises:

Described line fault selftest module detects the circuit faults itself; The line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to noble potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if having electronegative potential to occur in m capable connecting line _iWith j current row connecting line I _jBetween the intersection region line fault appears;

As a preferred embodiment of the present invention, described grounding resistance measurement step comprises the step of one-shot measurement stake resistance, comprising:

Step S1: do not inject constant current source, measure interference source voltage V ' _gIf, V ' _gGreater than setting value V10, then withdraw from;

Step S2: inject constant current source, the electric current of constant current source is I, measures interference source voltage V ' _gIf, V ' _gGreater than setting value V10, then withdraw from, can think that earth point connecting line or auxiliary current utmost point connecting line disconnect simultaneously;

Step S3: measure sampled voltage V ' _q, the moving reference power supply, make the sampling voltage low ebb between 0 and ε between, wherein ε is for setting minimal value, the moving reference power supply makes To make things convenient for the integral and calculating sampling voltage;

Step S4: do not inject constant current source, measure interference source voltage V _G1With sampled voltage V _Q1

Step S5: inject constant current source, measure interference source voltage V _G2With sampled voltage V _Q2

Step S6: calculate interference source voltage V _g, V _g=V _G1-V _G2

Step S7: calculate efficiently sampling voltage V _q, V _q=V _Q1-V _Q2If the efficiently sampling magnitude of voltage is 0 then thinks that boosting voltage utmost point connecting line disconnects;

Step S8: calculate stake resistance R _d, R _d=V _q÷ I;

Step S9: calculate auxiliary current electrode resistance R _z, R _z=V _g÷ I-R _d

Step S10: close constant current source.

As a preferred embodiment of the present invention, described grounding resistance measurement step comprises:

Step 1: do not inject constant current source, control chip U2 controls whether produce constant current source by the second triode Q2, the 3rd triode Q3; This step provides high level to allow the 5th triode Q5 end at pin DLEN, thereby does not produce constant current source;

Step 2: measure interference source voltage V ' _g

Step 3: judge V ' _gWhether greater than setting voltage V10; If V ' _gGreater than setting voltage V10 then interference source can influence the stable of constant current source, the grounding resistance measurement result is just inaccurate so, so must abandon test, jumps to step 23;

Step 4: inject constant current source, the electric current of constant current source is I; Control chip U2 provides low level allow the 5th triode Q5 conducting at pin DLEN, thereby produces constant current source I;

Step 5: measure interference source V ' _gControl chip U2 measures interference source V ' _g

Step 6: judge V ' _gWhether greater than setting voltage V10; If greater than setting voltage V10 then interference source can influence the stable of constant current source, the grounding resistance measurement result is just inaccurate so, so abandon test, can think that earth point connecting line or auxiliary current utmost point connecting line disconnect, and jump to step 23 simultaneously;

Step 7: measure sampling voltage V ' _qThrough the processing of large power, electrically resistance circuit, range driving switch circuit, interference source treatment circuit, control chip U2 measures sampling voltage V ' _q

Step 8: moving reference power supply; Carry out interference source and handle, fine setting digital regulation resistance AR1 allows its resistance can make sampling voltage V ' _qSatisfy

Step 9: judge

Whether set up; Judge V ' _qWhether the low ebb of waveform is in

If then continue; Otherwise, jump to step 23;

Step 10: adjust the range gear; Suppose at the first range gear, inject constant current source, read sampling voltage, if greater than the second setting voltage V20, then change the second range gear into, the resistance of the second range gear correspondence is less than the resistance of the first range gear correspondence; Otherwise do not carry out conversion, keep gear at the first range gear;

Step 11: do not inject constant current source; Control chip U2 provides high level to allow the 5th triode Q5 end at pin DLEN, thereby does not produce constant current source;

Step 12: measure interference source voltage V _G1; Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _G1

Step 13: measure sampling voltage V _Q1Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _Q1

Step 14: inject constant current source; Control chip U2 provides low level to allow the 5th triode Q5 end at pin DLEN, thereby produces constant current source;

Step 15: measure interference source V _G2Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _G2

Step 16: measure sampling voltage V _Q2; Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _Q2

Step 17: calculate effective interference source voltage V _g=V _G1-V _G2

Step 18: calculate efficiently sampling voltage V _q=V _Q1-V _Q2If the efficiently sampling magnitude of voltage is 0 then thinks that boosting voltage utmost point connecting line disconnects;

Step 19: calculate stake resistance R _d=V _q÷ I;

Step 20: calculate effective auxiliary current electrode resistance R _z=V _g÷ I-R _d

Step 21: do not inject constant current source; Control chip U2 provides high level to allow the 5th triode Q5 end at pin DLEN, thereby does not produce constant current source;

Step 22: output result of calculation; Result of calculation V with the front _g, R _d, R _zBe uploaded to the stake resistance monitoring terminal by the RS485 interface;

Step 23: finish this grounding resistance measurement;

Step 24: every interval setting-up time carries out grounding resistance measurement one time according to step 1 to step 23.

The control chip U2 of described microprocessor module provides high level for pin DLEN, the 3rd triode Q3 conducting, the second triode Q2 conducting, and the 5th triode Q5 ends, and the pin C place of the 5th triode Q5 is 0mA, does not inject constant current source; Interference source enters on the second operational amplifier U4B by the pin ISEND of the 3rd binding post J3, through the voltage follow function of the second operational amplifier U4B, measures interference source V ' at the pin ZGJ of control chip U2 _gThe grounding resistance measurement software module is judged V ' _gWhether greater than setting voltage V10, and if greater than setting voltage V10 this workflow finish, otherwise then continue;

Control chip U2 provides low level for pin DLEN, and the 3rd triode Q3 ends, the second triode Q2 ends, the 5th triode Q5 conducting, and constant current source injects for setting electric current I 1 in the pin C place of the 5th triode Q5; Interference source enters on the second operational amplifier U4B by the pin ISEND of the 3rd binding post J3, through the voltage follow function of the second operational amplifier U4B, measures interference source V ' at the pin ZGJ of control chip U2 _gThe first judgment unit judges V ' of microprocessor module _gWhether greater than setting value V10, and if greater than V10 this workflow finish, otherwise then continue;

Pin IJS by the 3rd binding post J3 imports initial sampling voltage, through the large power, electrically resistance circuit, carries out signal by the 3rd operational amplifier U5A and amplifies, and measures sampling voltage V ' at the pin A/D of control chip U2 _qFirst judging unit of microprocessor module is regulated digital regulation resistance AR1, and then measures sampling voltage V ' at the pin A/D of control chip U2 _q, can make sampling voltage V ' up to the potentiometer resistance of digital regulation resistance AR1 _qSatisfy

If can not satisfy then the end of this workflow, otherwise then continue;

Control chip U2 provides high level for pin GAIN SEL, and metal-oxide-semiconductor Q4 ends, and namely current range gear is the first range gear, measures sampling voltage V ' at the pin A/D of control chip U2 _q, the first judgment unit judges V ' of microprocessor module _qGreater than the second setting voltage V20, then control chip U2 provides low level, metal-oxide-semiconductor Q4 conducting for pin GAIN SEL, namely change the second range gear into, the resistance of the second range gear correspondence continues then less than the resistance of the first range gear correspondence, otherwise also continues;

Control chip U2 provides high level for pin DLEN, the 3rd triode Q3 conducting, the second triode Q2 conducting, and the 5th triode Q5 ends, and the pin C place of the 5th triode Q5 is 0mA, does not inject constant current source;

Pin ZGJ at control chip U2 measures interference source V _G1; Pin A/D at control chip U2 measures sampling voltage V _Q1; Control chip U2 provides low level for pin DLEN, and the 3rd triode Q3 ends, the second triode Q2 ends, the 5th triode Q5 conducting, and constant current source injects for setting electric current I 1 in the pin C place of the 5th triode Q5;

Pin ZGJ at control chip U2 measures interference source V _G2; Pin A/D at control chip U2 measures sampling voltage V _Q2

The grounding resistance measurement software module is according to formula V _q=V _Q1-V _Q2, calculate efficiently sampling voltage V _qIf the efficiently sampling magnitude of voltage is 0 then thinks that boosting voltage utmost point connecting line disconnects; The grounding resistance measurement software module is according to formula R _d=V _q÷ I calculates the effective grounding resistance R _d

Auxiliary current electrode resistance measurement module is according to formula V _g=Vg ₁-V _G2, calculate effective interference source V _gUtilize formula R _z=V _g÷ I-R _d, calculate effective auxiliary current electrode resistance R _z

The grounding resistance measurement software module is with the result of calculation V of front _g, R _d, R _zSecond pin, the 3rd pin by the first binding post J1 are uploaded to the stake resistance monitoring terminal; Finish this grounding resistance measurement.

Beneficial effect of the present invention is: switching value and stake resistance real time on-line monitoring system and method that the lightning protection device that the present invention proposes damages, can guarantee effective judgement of the switching value that each lightning protection device damages, can accurately record stake resistance by real-time online simultaneously.The present invention especially is suitable for the railway signal lightning protection.

The switching value measurement aspect that lightning protection device damages: by the matrix form wiring, can reduce the connection cable of switching value, improve the cleaning of lightning protection device inside simultaneously, guarantee effective judgement of each switching value performance simultaneously.In addition, the present invention can also realize that circuit self detects and lightning protection device detects, and be confirmed to be the fault of circuit self better, or lightning protection device breaks down.

Lightning protection device alert data acquisition system working stability of the present invention adopts matrix-style to arrange the lightning protection device switching value, improves stability, response speed that warning message is gathered, and reduces the wiring of lightning protection device switching value; Utilize the security that photoelectricity is isolated and transient voltage inhibition circuit improves acp chip and lightning protection device switching value; Adopt the circuit self-checking circuit to realize the line fault of lightning protection device switching value and the Intelligent Recognition of himself fault; Adopt mature and stable ARM chip design collector, further improved the stability of collector.

Acquisition system communication screen is simple to operate.Lightning protection device is numerous in the lightning protection cabinet, manually be difficult to timely fault location lightning protection device, and alarm indication fault location lightning protection device is fast shielded in collector communication, significantly improves the fault recognition rate of lightning protection device; The ground connection ground resistance of equipment, buildings etc. also shows at display screen synchronously, has improved the real-time that the ground connection performance is judged; By collector communication screen the systematic parameter of collector is set, and shows the warning message of lightning protection device switching value synchronously, further embodied the independence of collector systems.

The grounding resistance measurement aspect: the multiple middle-size and small-size earth point stake resistance of energy real time on-line monitoring, one-step installation, time saving and energy saving, and kept very high precision.Simultaneously, the present invention can measure auxiliary current electrode resistance and interference source voltage, also has the real-time online function, data transmission to Surveillance center can be monitored, and can report to the police according to setting.

Description of drawings

Fig. 1 is the composition synoptic diagram of real time on-line monitoring system of the present invention.

Fig. 2 damages the wiring diagram of on-off value data acquisition module for the present invention.

Fig. 3 is the measurement scheme synoptic diagram of stake resistance acquisition module of the present invention.

Fig. 4 is the composition synoptic diagram of stake resistance acquisition module of the present invention.

Fig. 5 is another composition synoptic diagram of stake resistance acquisition module of the present invention.

Fig. 6-1 is the circuit diagram of first binding post.

Fig. 6-2 is the circuit diagram of communication module.

Fig. 6-3 is the circuit diagram of the 3rd binding post.

Fig. 6-4 is the microprocessor circuit synoptic diagram.

Fig. 6-5 is the circuit diagram of power management module.

Fig. 6-6 is the circuit diagram of interference source acquisition module.

Fig. 6-7 is the circuit diagram of constant current source injection module.

Fig. 6-8 is the circuit diagram of sampled voltage read module.

Fig. 6-9 is the circuit diagram of interference source processing module.

Fig. 7 is the process flow diagram of stake resistance realtime on-line monitoring method of the present invention.

Fig. 8 forms synoptic diagram for the software module in the microprocessor module in the stake resistance acquisition module of the present invention.

Fig. 9 proofreaies and correct connection diagram for measuring gear.

Connected mode synoptic diagram when Figure 10 is measurement of Grounding Resistance.

Embodiment

Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.

Embodiment one

See also Fig. 1, the present invention has disclosed the on-off value data acquisition monitoring system that a kind of lightning protection device damages, and described system comprises some data acquisition system (DAS)s 100, server 200, some clients 300.Data acquisition system (DAS) 100 is gathered the status information of the switching value of corresponding lightning protection device damage, the resistance information of stake resistance respectively, can show in the lightning protection display device cashier's office in a shop of correspondence; Simultaneously, each data acquisition system (DAS) 100 gathers the data of gathering to server 200 by harvester 180, and operating personnel can be by the corresponding data in client 300 access servers 200 of long-range setting.Each lightning protection cabinet can arrange a data acquisition system 100, each data acquisition system (DAS) 100 gathers to server 200 by a harvester (machine of standing) 180 unified data with collection, certainly, a plurality of data acquisition system (DAS) 100 also can gather the data of gathering to server 200 by a plurality of harvesters (machine of standing) 180.

Data acquisition system (DAS) 100 comprises: damage on-off value data acquisition module, stake resistance acquisition module 140, data processing module (can be MUC110), display unit 120, Input Control Element.MUC110 connects damage on-off value data acquisition module, stake resistance acquisition module 140, display unit 120, Input Control Element respectively.Described display unit 120 is handled the whether resistance information etc. of normal information, stake resistance of back each switching value of lightning protection device in order to show through MUC110; Described Input Control Element is in order to the MUC110 input of control commands.

Each lightning protection cabinet is an independently lightning protection device alarm condition monitoring system, can be touch-screen by Input Control Element and display unit 120(Input Control Element and display unit 120) can carry out the setting of collector systems parameter; The status information of lightning protection device switching value can show at display unit 120 in real time synchronously; If network service is interrupted, lightning protection device damages the information that on-off value data acquisition module can be preserved collection automatically, and behind communication recovery the very first time be uploaded to server 200 in the remote monitoring center machine room.

See also Fig. 2, lightning protection device comprises that the capable n row of m are the switching value of matrix form arrangement (as being the switching value of 15 row, 6 row); Switching value D _AbBe defined as the capable b row of a switching value; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n].

Damage on-off value data acquisition module and be the matrix form arrangement.Described damage on-off value data acquisition module comprises m capable connecting line, a n row connecting line, i capable connecting line K _iFirst port that connects the capable n of an i switching value, j row connecting line I _jSecond port that connects m switching value of j row; Wherein, i, j are integer, i ∈ [1, m], j ∈ [1, n].Simultaneously, i capable connecting line K _iOr j row connecting line I _j First diode 132 by correspondence connects switching value D _IjThe corresponding port of (being labeled as 131 among the figure).That is, each switching value 131 all connects one first diode 132, and each switching value 131 connects its corresponding capable connecting line, row connecting line respectively with the two ends of first diode, 132 combinations.

Described damage on-off value data acquisition module comprises that also m*n is the circuit self-checking circuit that matrix form is arranged, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode 133; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jThe direction that it is pointed out that first diode, 132 settings that second diode 133 is corresponding with it is opposite.As shown in Figure 2, in the present embodiment, an end of switching value 131 connects the capable connecting line of its correspondence, and the other end connects the positive pole of first diode 132; The negative pole of first diode 132 connects corresponding row connecting line; The positive pole of second diode 133 connects corresponding row connecting line, and the negative pole of second diode 133 connects corresponding capable connecting line.

The lightning protection device phenomenon of the failure has two kinds: the one, and line fault, the 2nd, lightning protection device fault.When system carries out the lightning protection device malfunction monitoring, must distinguish the type of fault, in order in time notify the maintainer, be convenient to the investigation of fault, improve the security of lightning-protection system.Consider that based on this point the present invention has disclosed the solution of an effective circuit self check of cover and lightning protection device malfunction monitoring.

Described damage on-off value data acquisition module comprises line fault selftest module, lightning protection device fault scanning module, can carry out two-way detection.

Described line fault selftest module is in order to detect the circuit faults itself; The line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to noble potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if having electronegative potential to occur in m capable connecting line _iWith j current row connecting line I _jBetween the intersection region line fault appears.

Described lightning protection device fault scanning module is in order to detect the lightning protection device fault; The current potential of m capable connecting line and n row connecting line all is set to noble potential; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if m capable connecting line has electronegative potential to occur _iWith j current row connecting line I _jBetween the intersection region lightning protection device fault appears.

Perhaps, described lightning protection device fault scanning module all is set to noble potential with the current potential of m capable connecting line and n row connecting line; Make a capable connecting line K in m the capable connecting line then successively _iCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of n row connecting line should be height; This moment, then current potential was j low row connecting line I if n row connecting line has electronegative potential to occur _jWith i current capable connecting line K _iBetween the intersection region lightning protection device fault appears.

The switching value of lightning protection device damage of the present invention and the composition of stake resistance real time on-line monitoring system have more than been introduced, the present invention also discloses the measuring method of above-mentioned measuring system in the switching value and stake resistance real time on-line monitoring system that disclose above-mentioned lightning protection device damage; Described method comprises switch acquisition step, the grounding resistance measurement step that lightning protection device damages.

The switch acquisition step that lightning protection device damages comprises the steps:

[step S1] is matrix form arrangement, switching value D with m capable connecting line, a n row connecting line of described damage on-off value data acquisition module _IjTwo ends respectively with i capable connecting line K _iAnd j row connecting line I _jConnect; I capable connecting line K _iOr j row connecting line I _jFirst diode by correspondence connects switching value D _IjCorresponding port; Wherein, i, j are integer, i ∈ [1, m], j ∈ [1, n].

[step S2] described lightning protection device fault scanning module detects the lightning protection device fault; The current potential of m capable connecting line and n row connecting line all is set to noble potential; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if m capable connecting line has electronegative potential to occur _iWith j current row connecting line I _jBetween the point of crossing lightning protection device fault appears.

Perhaps, described lightning protection device fault scanning module all is set to noble potential with the current potential of m capable connecting line and n row connecting line; Make a capable connecting line K in m the capable connecting line then successively _iCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of n row connecting line should be height; This moment, then current potential was j low row connecting line I if n row connecting line has electronegative potential to occur _jWith i current capable connecting line K _iBetween the point of crossing lightning protection device fault appears.

[step S3] described line fault selftest module detects the circuit faults itself; The line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to noble potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if having electronegative potential to occur in m capable connecting line _iWith j current row connecting line I _jBetween the point of crossing line fault appears.

Perhaps, described line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a capable connecting line K in m the capable connecting line then successively _iCurrent potential be set to noble potential; If the circuit non-fault, the current potential of n row connecting line should be height; This moment, then current potential was j low row connecting line I if having electronegative potential to occur in n row connecting line _jWith i current capable connecting line K _iBetween the point of crossing line fault appears.

[step S4] shows that by display unit whether normally process MUC110 handles back each switching value of lightning protection device information.

[step S5] by Input Control Element to the MUC110 input of control commands.

Below mainly introduce the stake resistance acquisition module of measuring system of the present invention.See also Fig. 3, the present invention has disclosed the stake resistance acquisition module, injects steady current I by the auxiliary current utmost point, extremely takes out sampled voltage V at boosting voltage, suitably adjust the boosting voltage utmost point in the insertion point on ground, the stake resistance R=V/I that thinks equipment that can be similar to.Simultaneously the stake resistance acquisition module also provides communication interface to be connected with remote monitoring terminal, can intelligent management equipment and the ground state of buildings by remote monitoring terminal.

See also Fig. 4, stake resistance acquisition module of the present invention comprises stake resistance on-line measurement device and remote monitoring terminal 9; Stake resistance on-line measurement device comprises interference source processing module 1, communication module 2, grounding resistance measurement software module 3, power management module 4, constant current source injection module 5, sampled voltage read module 6, interference source acquisition module 7, microprocessor 8; Described microprocessor 81 connects interference source processing module 1, communication module 2, grounding resistance measurement software module 3, power management module 4, constant current source injection module 5, sampled voltage read module 6, interference source acquisition module 7 respectively and also is connected with remote monitoring terminal 9.Remote monitoring terminal 9 all right Connection Service devices are sent to Monitoring Data in the server.

A side has 3 lines in stake resistance on-line measurement device, and opposite side has 4 lines; In the present embodiment, 1. root be+the 24v power lead; 2. root be ground wire; 3., 4. root is the RS485 interface line; 5. root be auxiliary current utmost point interface line C _(H)6. root be boosting voltage utmost point interface line P _(S)7. root be earthing pole interface line E.

Described power management module 4 is used to measuring system that power supply is provided; Described constant current source injection module 5 provides constant current source or closes constant current source under the control of microprocessor 8.Interference source acquisition module 7 is measured interference source voltage in order to accept the control of microprocessor 8.Interference source processing module 1 is accepted the control of microprocessor 8, carries out the adjustment of sampling voltage benchmark according to interference source.Described sampled voltage read module 6 is accepted the control of microprocessor 8, measures sampled voltage.Described grounding resistance measurement software module 3 is accepted the control of microprocessor 8, and the sampled voltage that measures according to described sampled voltage read module 6 calculates stake resistance.

See also Fig. 5, except the module that Fig. 4 describes, described measuring system also comprises cable module 10, interface line module 11.Below respectively each module is done further and introduced.

Seeing also Fig. 6-1, in the present embodiment, cable module 1 comprises+2 of 2 of 24v power input lines and RS485 order wires.See also Fig. 6-2, communication module 2 has used integrated circuit U1 (MAX485) to realize RS485 communication, makes transmission range farther, strong interference immunity.Grounding resistance measurement software module 3 is the software systems in microprocessor 8 operations.

See also Fig. 6-5, power management module 4 comprises four fractions: 1) power protecting circuit; Adopt Transient Suppression Diode D1 in parallel (SMAJ30A) and series connection insurance resistance F1, prevent overvoltage and thunderbolt.2) a DC/DC conversion control circuit; Adopt integrated circuit (IC) 1 (ICI34063) to realize, give its Vss and Cv pin ground connection, generation+7v.3) the 2nd DC/DC conversion control circuit; Adopt IC2 (ICI34063) integrated circuit to realize, give its Vss and Cv pin earth-free, generation-5v.4) three-terminal voltage-stabilizing circuit; Adopt U3 (LM1117DT-5) integrated circuit, generation+5v.

See also Fig. 6-7, constant current source injection module 5 comprises four parts: 1) constant current source on-off circuit; Adopt triode Q2 (8550) and triode Q3 (8050) design on-off circuit.2) operational amplification circuit; Adopt operational amplifier U4A (LM2904) to produce constant voltage circuit, thereby guarantee the stable of electric current.3) current stabilizing circuit; Adopt triode Q5 (BCX53-16) design, cut-off state does not produce constant current source, and conducting state is the stable also output state that produces of constant current source.4) negative level suppresses circuit; Adopt Transient Suppression Diode D2 (SMAJ30A) and D3 (SMAJ30A) to constitute negative level and suppress circuit.

See also Fig. 6-6, interference source acquisition module 6 comprises two parts: 1) voltage follower circuit; Adopt operational amplifier U4B (LM2904) to produce constant voltage circuit, at ZGL pin place, namely the V2 point reads interference source voltage for U2.2) interference source Acquisition Circuit; Adopt R28, R38, C15 to constitute the interference source Acquisition Circuit, interference source is incorporated into U4B.

See also Fig. 6-8, sampled voltage read module 7 comprises three parts: 1) operational amplification circuit; Adopt U5A (LM2904) to amplify, improve measurement sensitivity and the accuracy of U2.2) large power, electrically resistance circuit; Adopt 4 resistance and string mode also to form a high-power resistance, improve the serviceable life of resistance.3) 10 Ω/100 Ω range driving switch circuit; Adopt Q4 (2N7002) to remove to read sample voltage, carry out the control of range gear.

See also Fig. 6-9, the interference source processing module is carried out the adjustment of sampling voltage benchmark based on interference source is long-pending; Adopt controlled AR1 (X9312) digital regulation resistance and U5B (LM2904) to carry out the voltage reference adjustment.

As shown in Figure 9, in resistance R ₃The place connects 10 Ω, and 100 Ω resistance carry out 10 Ω of measurement mechanism respectively, and 100 Ω gears are from normal moveout correction; This function is finished before stake resistance on-line measurement device dispatches from the factory.Wherein, R1=100 Ω; R2=100 Ω; R3=10 Ω/100 Ω.

See also Fig. 6-3, interface line module 8 comprises three lines, is respectively injector interface line C (H), boosting voltage utmost point interface line P (S), earthing pole interface line E.

See also Fig. 6-4, microprocessor 8 adopts PIC18F4550 as microprocessor.In the present embodiment, described microprocessor 8 specifically comprises constant current source control module, interference source collection control module, first judging unit, sampled voltage measure-controlling unit, interference source processing unit, grounding resistance measurement control module, auxiliary current electrode resistance measure-controlling unit; Certainly, grounding resistance measurement software module 3 also can be the software systems in the microprocessor 8.

Wherein, the constant current source control module is in order to control constant current source injection module injection constant current source electric current I or the constant current source electric current I is closed; Interference source is gathered control module and is measured interference source voltage in order to control the interference source acquisition module; First judging unit in order to the interference source voltage judging the interference source acquisition module and measure whether greater than setting value V10; The sampled voltage measure-controlling unit is measured sampled voltage in order to control described sampled voltage read module; The interference source processing unit carries out the adjustment of sampled voltage benchmark according to interference source, in order to the moving reference power supply, make sampled voltage low ebb between 0 and ε between, wherein ε is for setting minimal value.The grounding resistance measurement control module calculates stake resistance in order to control described grounding resistance measurement software module; Described grounding resistance measurement software module is at first obtained under the situation of not injecting constant current source, the interference source voltage V that described sampled voltage read module measures _G1And the sampled voltage V of described sampled voltage read module measurement _Q1; Then obtain under the situation of injecting constant current source the interference source voltage V that described sampled voltage read module measures _G2With sampled voltage V _Q2; Then calculate efficiently sampling voltage V _q, V _q=V _Q1-V _Q2; Then calculate stake resistance R _d, R _d=V _q÷ I.Auxiliary current electrode resistance measure-controlling unit calculates the auxiliary current electrode resistance in order to control an auxiliary current electrode resistance measurement module; Auxiliary current electrode resistance measurement module calculates interference source voltage V _g, V _g=V _G1-V _G2; Then calculate auxiliary current electrode resistance R _z, R _z=V _g÷ I-R _d

The detailed process of hardware circuit work comprises:

1) power unit

Pin 1 by the first binding post J1 provides+the 24v power supply for stake resistance on-line measurement device, constitutes power protecting circuit by fuse F1 and Transient Suppression Diode D1 then; Adopt IC1 (ICI34063) integrated circuit, input+24v power supply is given its Vss and Cv pin ground connection, generation+7v; Adopt IC2 (ICI34063) integrated circuit, input+24v power supply gives its Vss and Cv pin earth-free, generation-5v; Adopt U3 (LM1117DT-5) integrated circuit, make up the three-terminal voltage-stabilizing circuit, generation+5v.

2) measuring process

The workflow of one-shot measurement stake resistance is as follows:

U2 provides high level for pin DLEN, Q3 conducting, Q2 conducting, and Q5 ends, and the pin C place of Q5 is 0mA, does not inject constant current source; Interference source enters on the U4B by the pin ISEND of the 3rd binding post J3, through the voltage follow function of U4B, measures interference source V ' at the pin ZGJ of U2 _g, i.e. the point of V2 among Fig. 3; Grounding resistance measurement software among Fig. 2 carries out V ' _g＞18v judges, and if greater than 18v this workflow finish, otherwise then continue; U2 provides low level for pin DLEN, and Q3 ends, Q2 ends, the Q5 conducting, and the pin C place of Q5 is 20mA, injects constant current source; Interference source enters on the U4B by the pin ISEND of the 3rd binding post J3, through the voltage follow function of U4B, measures interference source V ' at the pin ZGJ of U2 _g, i.e. the point of V2 among Fig. 3; Grounding resistance measurement software among Fig. 2 carries out V ' _g＞18v judges, and if greater than 18v this workflow finish, can think that earth point connecting line or auxiliary current utmost point connecting line disconnect simultaneously, otherwise then continue; Pin IJS by the 3rd binding post J3 imports initial sampling voltage, through large power, electrically resistance circuit R11-R14, carries out signal by operational amplifier U5A and amplifies, and measures sampling voltage V ' at the pin A/D of U2 _q, i.e. the point of V3 among Fig. 3; Grounding resistance measurement software among Fig. 2 is regulated the potentiometer of AR1, and then measures sampling voltage V ' at the pin A/D of U2 _q, can make sampling voltage V ' up to the potentiometer resistance of AR1 _qSatisfy

If can not satisfy then the end of this workflow, otherwise then continue; U2 provides high level for pin GAIN SEL, and Q4 ends, and namely current range gear is 100 Ω range gears, measures sampling voltage V ' at the pin A/D of U2 _q, the grounding resistance measurement software among Fig. 2 is judged V ' _q, greater than 3.3v, then U2 provides low level for pin GAIN SEL, and the Q4 conducting namely changes 10 Ω range gears into, continues then, otherwise also continues; U2 provides high level for pin DLEN, Q3 conducting, Q2 conducting, and Q5 ends, and the pin C place of Q5 is 0mA, does not inject constant current source; Pin ZGJ at U2 measures interference source

Pin A/D at U2 measures sampling voltage

U2 provides low level for pin DLEN, and Q3 ends, Q2 ends, the Q5 conducting, and the pin C place of Q5 is 20mA, injects constant current source; Pin ZGJ at U2 measures interference source

Pin A/D at U2 measures sampling voltage

Grounding resistance measurement software among Fig. 2 is according to formula Calculate effective interference source V _gGrounding resistance measurement software among Fig. 2 is according to formula

Calculate efficient sampling voltage V _qIf the efficiently sampling magnitude of voltage is 0 then thinks that boosting voltage utmost point connecting line disconnects; Grounding resistance measurement software among Fig. 2 is according to formula R _d=V _q÷ I calculates the effective grounding resistance R _dGrounding resistance measurement software among Fig. 2 is according to formula R _z=V _g÷ I-R _d, calculate effective auxiliary current electrode resistance R _zU2 provides high level for pin DLEN, Q3 conducting, Q2 conducting, and Q5 ends, and the pin C place of Q5 is 0mA, does not inject constant current source; Grounding resistance measurement software among Fig. 2 is with the result of calculation V of front _g, R _d, R _zPin 2,3 by the first binding post J1 is uploaded to the stake resistance monitoring terminal with the RS485 communication mode; Finish this grounding resistance measurement.This flow process 30s carries out once.

More than introduced the composition of stake resistance acquisition module in the measuring system of the present invention, the present invention also discloses the real-time online acquisition method of above-mentioned module when disclosing the stake resistance acquisition module.

The step of measurement of Grounding Resistance (and auxiliary current electrode resistance) is as follows:

Step S201: do not inject constant current source I, measure interference source V ' _gIf, V ' _g＞18v then withdraws from;

Step S202: inject constant current source I, measure interference source V ' _gIf, V ' _g＞18v then withdraws from, and can think that earth point connecting line or auxiliary current utmost point connecting line disconnect simultaneously;

Step S203: measure sampling voltage V ' _q, the moving reference power supply, make the sampling voltage low ebb between 0 and ε between, wherein ε is minimal value, carries out the moving reference power supply and makes

Be exactly for convenience of the integral and calculating sampling voltage;

Step S204: do not inject constant current source I, measure interference source

And sampling voltage

Step S205: inject constant current source I, measure interference source

And sampling voltage

Step S206: calculate interference source V _g,

Step S207: calculate sampling voltage V _q,

If the efficiently sampling magnitude of voltage is 0 then thinks that boosting voltage utmost point connecting line disconnects;

Step S208: calculate stake resistance R _d, R _d=V _q÷ I;

Step S209: calculate auxiliary current electrode resistance R _z, R _z=V _g÷ I-R _d

Step S210: do not inject constant current source I.

Its particular flow sheet as shown in Figure 7; Below according to the flow process of Fig. 7 step by step provide detailed description.

[first step] beginning

Begin to carry out grounding resistance measurement.

[second step] do not inject constant current source

In Fig. 3, microprocessor controls whether produce constant current source by triode Q2, the Q3 of constant current source injection module 5.This step provides high level to end by triode Q5 at DLEN end, thereby does not produce constant current source, and just the V1 electric current of ordering is 0mA.

[the 3rd step] measures interference source V ' _g

In Fig. 6-7, when V1 point electric current was 0mA, among Fig. 6-6, microprocessor was measured the voltage that V2 is ordered, i.e. interference source V ' _g

[the 4th step] judges V ' _g＞18v

Judge V ' _g＞18v, if greater than 18v then interference source can influence the stable of constant current source, the grounding resistance measurement result is just inaccurate so, so must abandon test, jumps to for the 24 step.

[the 5th step] injects constant current source I

Microprocessor provides low level allow triode Q5 conducting at DLEN end, thereby produces constant current source, and just the electric current that V1 is ordered among Fig. 6-7 is 20mA, i.e. I=20mA.

[the 6th step] measures interference source V ' _g

In Fig. 6-7, when V1 point electric current was 20mA, among Fig. 6-6, microprocessor was measured the voltage that V2 is ordered, i.e. interference source V ' _g

[the 7th step] judges V ' _g＞18v

Judge V ' _g＞18v, if greater than 18v then interference source can influence the stable of constant current source, the grounding resistance measurement result is just inaccurate so, so must abandon test, can think that earth point connecting line or auxiliary current utmost point connecting line disconnect, and jump to for the 24 step simultaneously.

[the 8th step] measures sampling voltage V ' _q

In Fig. 6-7, when V1 point electric current is 20mA, through the processing of large power, electrically resistance circuit, 10 Ω/100 Ω range driving switch circuit, interference source treatment circuit, the voltage that V3 is ordered among the microprocessor survey sheet 6-8, i.e. interference source V ' _q

[the 9th step] moving reference power supply

By the interference source treatment circuit, the moving reference power supply, trimmer potentiometer AR1 allows its resistance can make sampling voltage

[the tenth step] judged

Judge V ' _qWhether the low ebb of waveform is in

If then continue; Otherwise, jumped to for the 24 step.

[the 11 step] adjusts the range gear

Suppose at 100 Ω range gears, inject constant current source, read sampling voltage, if greater than 3.3v, then change 10 Ω range gears into; Otherwise do not change.

[the 12 step] do not inject constant current source

Microprocessor provides high level to end by triode Q5 at the DLEN end, thereby does not produce constant current source, and just the electric current that V1 is ordered in Fig. 6-7 is 0mA.

[the 13 step] measures interference source

In Fig. 6-7, when V1 point electric current was 0mA, among Fig. 6-6, microprocessor was measured through the V2 point voltage after the adjustment of sampling voltage benchmark, i.e. interference source

[the 14 step] measures sampling voltage

In Fig. 6-7, when V1 point electric current was 0mA, microprocessor was measured through V3 point voltage, i.e. interference source among the Fig. 6-8 after the adjustment of sampling voltage benchmark

[the 15 step] injects constant current source I

Microprocessor provides low level to allow triode Q5 end at the DLEN end, thereby produces constant current source, and just the electric current that V1 is ordered among Fig. 6-7 is 20mA.

[the 16 step] measures interference source

In Fig. 6-7, when V1 point electric current was 20mA, microprocessor was measured through V2 point voltage, i.e. interference source among the Fig. 6-6 after the adjustment of sampling voltage benchmark

[the 17 step] measures sampling voltage

In Fig. 6-7, when V1 point electric current was 20mA, microprocessor was measured through V3 point voltage, i.e. interference source among the Fig. 6-8 after the adjustment of sampling voltage benchmark

[the 18 step] calculates interference source

V _g=V _G1-V _G2

According to the measurement result of front, using formula

Calculate effective V _g

[the 19 step] calculates sampling voltage

V _q=V _Q1-V _Q2

According to the measurement result of front, using formula

Calculate effective V _qIf the efficiently sampling magnitude of voltage is 0 then thinks that boosting voltage utmost point connecting line disconnects.

[the 20 step] calculates stake resistance R _d=V _q÷ I

According to the measurement result of front, using formula R _d=V _q÷ I calculates effective R _d

[the 21 step] calculates auxiliary current electrode resistance R _z=V _g÷ I-R _d

According to the measurement result of front, using formula R _z=V _g÷ I-R _d, calculate effective R _z

[the 22 step] do not inject constant current source

In Fig. 6-7, microprocessor provides high level to end by triode Q5 at the DLEN end, thereby does not produce constant current source, and just the electric current that V1 is ordered among Fig. 6-7 is 0mA.

[the 23 step] output result of calculation

Result of calculation V with the front _g, R _d, R _zBe uploaded to the stake resistance monitoring terminal by the RS485 interface.

[the 24 step] finishes

Finish this grounding resistance measurement.

This flow process 30s carries out once (certainly setting-up time at interval) as required.

Embodiment two

The difference of present embodiment and embodiment one is that in the present embodiment, lightning protection device comprises the capable switching value of m, altogether s switching value; The quantity of every capable switching value is identical or different.

In the present embodiment, in each row switching value, delegation's switching value comprises n switching value at most; Switching value D _AbBe defined as the capable b row of a switching value; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n].

Described damage on-off value data acquisition module comprises m capable connecting line, a n row connecting line, switching value D _IjTwo ends respectively with i capable connecting line K _iAnd j row connecting line I _jConnect; Simultaneously, i capable connecting line K _iOr j row connecting line I _jFirst diode by correspondence connects switching value D _IjCorresponding port; Wherein, i, j are integer, i ∈ [1, m], j ∈ [1, n].

Described lightning protection device fault scanning module is in order to detect the lightning protection device fault; The current potential of m capable connecting line and n row connecting line all is set to noble potential; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to electronegative potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if m capable connecting line has electronegative potential to occur _iWith j current row connecting line I _jBetween the point of crossing lightning protection device fault appears.

Preferably, described damage on-off value data acquisition module also comprises s circuit self-checking circuit, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jThe direction that first diode that second diode is corresponding with it arranges is opposite.

Described line fault selftest module is in order to detect the circuit faults itself; The line fault selftest module all is set to electronegative potential with the current potential of m capable connecting line and n row connecting line; Make a row connecting line I in n the row connecting line then successively _jCurrent potential be set to noble potential; If the circuit non-fault, the current potential of m capable connecting line should be height; This moment, then current potential was i low capable connecting line K if having electronegative potential to occur in m capable connecting line _iWith j current row connecting line I _jBetween the point of crossing line fault appears.

Embodiment three

The difference of present embodiment and embodiment one is that in the present embodiment, in the stake resistance real time on-line monitoring, the software function module of microcontroller is formed as shown in Figure 8; Below each module among Fig. 8 is described.

1) constant current source switch control

This module mainly is responsible for control and whether is imported constant current source, and the constant current source of this device is 20mA.

2) measure constant current source

This module is responsible for that V1 point reads constant current source from Fig. 6-7, simultaneously also the dispatch from the factory self-correction of preceding constant current source of generator.

3) measure interference source

Whether excessive this module is at the situation of injecting constant current source and the not injecting constant current source interference source that judges, this device with+18v is boundary, if excessive then can not measurement of Grounding Resistance; If the boundary of being no more than is then 4) and 5) after the step, not injecting constant current source and injecting under the situation of constant current source and measure interference source, give 7) step calculates that data are provided.

4) the range gear is identified automatically

This module has the function of automatic identification stake resistance range, if stake resistance surpasses 10 Ω, then selects 100 Ω gears to measure, if be no more than, then selects 10 Ω gears to measure.The measurement range of this device is 0 Ω～100 Ω.

5) interference source is handled

Integral and calculating is handled interference source for convenience, adjusts the sampling voltage benchmark, the end product of sampling voltage preferably is not negative, so will adjust initial sampling voltage, the low ebb of its waveform is adjusted into greater than 0 less than ε, ε be one greater than 0 minimal value.This module mainly is responsible for the adjustment of sampling voltage.

6) measure sampling voltage

This module is at first measured sampling voltage, carries out the voltage reference adjustment then; Carry out sampling voltage in the situation of not injecting and inject constant current source then and measure, in order to calculate efficient sampling voltage.

7) calculate interference source

This module is responsible for according to 3) interference source measured calculates effective interference source.

8) calculate stake resistance

This module is according to 6) efficient sampling voltage and the constant current source extrapolated, calculate effective grounding resistance.

9) calculate the auxiliary current electrode resistance

This module is according to 7) the effective interference source, constant current source and the effective grounding resistance that calculate, calculate the auxiliary current electrode resistance.

10) communication module

This module is responsible for receiving the instruction of stake resistance monitoring terminal, simultaneously interference source, stake resistance, the auxiliary current electrode resistance of calculating is uploaded to the stake resistance monitoring terminal.

Embodiment four

The difference of present embodiment and embodiment one is, in the present embodiment, can set the stake resistance alarm threshold value, and when stake resistance surpasses threshold value, measurement mechanism will be reported to the police.

See also Figure 10, C _(H)Be electric current utmost point interface, P _(S)Be that boosting voltage utmost point interface, E are the ground wire interfaces; During the actual measurement stake resistance, C _(H)Be to be connected P with the injector ground rod _(S)Be to be connected with the sampled voltage ground rod, E directly is connected with the ground wire of equipment or buildings.This measurement mechanism provides the RS485 mode to link to each other with the stake resistance monitoring terminal.At stake resistance monitoring terminal operational monitoring software, just can be implemented in line real time on-line monitoring and historical query function, as dynamic demonstration, alarm indication, historical data read, consult, preserve, function such as printing.

According to the result of interference source, auxiliary current electrode resistance, grounding resistance measurement, the stake resistance collection result can be divided into nine kinds of states, specifically as shown in table 1.

Nine kinds of states of table 1 grounding resistance measurement

Annotate: except installation and measured value be not less than the setting value, all the other states occur 5 times continuously and also can report to the police.

According to nine kinds of states of table 1, the stake resistance monitoring terminal dynamically shows stake resistance resistance, interference source voltage, the auxiliary current electrode resistance that stake resistance on-line measurement terminal is uploaded; If state be

state

2,5,6,7 and state 8 in the superthreshold situation, then report to the police.

In sum, switching value and stake resistance real time on-line monitoring system and method that the lightning protection device that the present invention proposes damages, can reduce the connection cable of switching value, improve the cleaning of lightning protection device inside, guarantee effective judgement of each switching value performance simultaneously, can accurately record stake resistance by real-time online in addition.The present invention especially is suitable for the railway signal lightning protection.

Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change is possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or essential characteristic, and the present invention can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.Under the situation that does not break away from the scope of the invention and spirit, can carry out other distortion and change to disclosed embodiment here.

Claims

1. the switching value and the stake resistance real time on-line monitoring system that damage of a lightning protection device, it is characterized in that, described measuring system comprises: server, one or more remote monitoring terminal, one or more data acquisition system (DAS), described server connect each remote monitoring terminal and each data acquisition system (DAS) respectively;

2. the switching value and the stake resistance real time on-line monitoring system that damage of a lightning protection device, it is characterized in that, described measuring system comprises: server, one or more remote monitoring terminal, one or more data acquisition system (DAS), described server connect each remote monitoring terminal and each data acquisition system (DAS) respectively;

3. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 2 is characterized in that:

Described damage on-off value data acquisition module also comprises s circuit self-checking circuit, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jThe direction that first diode that second diode is corresponding with it arranges is opposite;

4. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 2 is characterized in that:

Described microprocessor module specifically comprises:

The grounding resistance measurement control module calculates stake resistance in order to control described grounding resistance measurement software module; Described grounding resistance measurement software module is at first obtained under the situation of not injecting constant current source, the interference source voltage V that described sampled voltage read module measures _G1And the sampled voltage V of described sampled voltage read module measurement _Q1; Then obtain under the situation of injecting constant current source the interference source voltage V that described sampled voltage read module measures _G2With sampled voltage V _Q2Then calculate efficiently sampling voltage V _q, V _q=V _Q1-V _Q2; Then calculate stake resistance R _d, R _d=V _q÷ I;

5. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 2 is characterized in that:

Described measuring system also comprises power management module, and described power management module comprises:

Described constant current source injection module comprises:

Described interference source acquisition module comprises:

Described sampled voltage read module comprises:

6. the switching value and the stake resistance realtime on-line monitoring method that damage of the described lightning protection device of a claim 2 is characterized in that described method comprises the switch acquisition step that lightning protection device damages, and comprising:

7. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 6 is characterized in that:

Described damage on-off value data acquisition module also comprises s circuit self-checking circuit, and namely each switching value is furnished with a circuit self-checking circuit, and each circuit self-checking circuit comprises second diode; Circuit self-checking circuit S _AbBe defined as the capable b column line of a self-checking circuit; Wherein, a, b are integer, a ∈ [1, m], b ∈ [1, n]; Circuit self-checking circuit S _IjAn end connect i capable connecting line K _i, the other end connects j row connecting line I _jDescribed damage on-off value data acquisition module also comprises the line fault selftest module; The direction that first diode that second diode is corresponding with it arranges is opposite;

8. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 6 is characterized in that:

Described grounding resistance measurement step comprises the step of one-shot measurement stake resistance, comprising:

Step S3: measure sampled voltage V ' _q, the moving reference power supply, make the sampling voltage low ebb between 0 and ε between, wherein ε is for setting minimal value, the moving reference power supply makes

To make things convenient for the integral and calculating sampling voltage;

Step S6: calculate interference source voltage V _g, V _g=V _G1-V _G2

Step S8: calculate stake resistance R _d, R _d=V _q÷ I;

Step S10: close constant current source.

9. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 6 is characterized in that:

Described grounding resistance measurement step comprises:

Step 2: measure interference source voltage V ' _g

Step 9: judge

Whether set up; Judge V ' _qWhether the low ebb of waveform is in

If then continue; Otherwise, jump to step 23;

Step 13: measure sampling voltage V _Q1; Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _Q1

Step 15: measure interference source V _G2; Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _G2

Step 16: measure sampling voltage V _Q2Control chip U2 measures through the interference source voltage V after the adjustment of sampling voltage benchmark _Q2

Step 17: calculate effective interference source voltage V _g=V _G1-V _G2

Step 19: calculate stake resistance R _d=V _q÷ I;

Step 23: finish this grounding resistance measurement;

10. the switching value and the stake resistance real time on-line monitoring system that damage of lightning protection device according to claim 6 is characterized in that:

Described grounding resistance measurement step comprises:

If can not satisfy then the end of this workflow, otherwise then continue;

Pin ZGJ at control chip U2 measures interference source V _G1Pin A/D at control chip U2 measures sampling voltage V _Q1; Control chip U2 provides low level for pin DLEN, and the 3rd triode Q3 ends, the second triode Q2 ends, the 5th triode Q5 conducting, and constant current source injects for setting electric current I 1 in the pin C place of the 5th triode Q5;

Pin ZGJ at control chip U2 measures interference source V _G2Pin A/D at control chip U2 measures sampling voltage V _Q2

Auxiliary current electrode resistance measurement module is according to formula V _g=V _G1-V _G2, calculate effective interference source V _gUtilize formula R _z=V _g÷ I-R _d, calculate effective auxiliary current electrode resistance R _z