CN105606992A - LCM circuit detection apparatus and method for detecting LCM circuit - Google Patents
LCM circuit detection apparatus and method for detecting LCM circuit Download PDFInfo
- Publication number
- CN105606992A CN105606992A CN201610073636.8A CN201610073636A CN105606992A CN 105606992 A CN105606992 A CN 105606992A CN 201610073636 A CN201610073636 A CN 201610073636A CN 105606992 A CN105606992 A CN 105606992A
- Authority
- CN
- China
- Prior art keywords
- voltage
- lcm
- voltage detection
- module
- detection unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses an LCM circuit detection apparatus and a method for detecting an LCM circuit, and belongs to the technical field of detection. A center processor included by the apparatus is connected with a digital-to-analog conversion module, and the digital-to-analog conversion module is connected with a voltage detection module; the voltage detection module is internally provided with multiple voltage detection units, and each voltage detection unit is internally provided with an electromagnetic relay; when there are no currents in a coil of the electromagnetic relay, the voltage detection unit connects an LCM to be detected to a first voltage shift through an armature; when there are currents in the coil of the electromagnetic relay, the voltage detection unit connects the LCM to be detected to a second voltage shift; and voltages corresponding to the first voltage shift are smaller than voltages corresponding to the second voltage shift. According to the invention, whether a grounding short circuit occurs in an LCM is detected by use of the first voltage shift with quite small voltage values, and when it is detected that no grounding shot circuits occur in the LCM, the LCM is connected with the second voltage shift with quite large voltage values for fault detection, such that the LCM is effectively prevented from being burnt and resources are saved.
Description
Technical field
The present invention relates to detection technique field, particularly a kind of LCM circuit checker and to LCM electricityThe method that road is detected.
Background technology
Along with scientific and technological development, the collection such as smart mobile phone, panel computer, notebook computer, E-book readerBecome to have the electronic equipment of LCM (LiquidCrystalDisplayModule, liquid crystal display module) giving birth toIn work, be seen everywhere. LCM is as a kind of LCD product with high integration, can be more easily with respectivelyPlant microcontroller and connect, to realize demonstration, to control function. In view of the importance of LCM, at present at medium and small chiIn the production process of very little liquid crystal panel, all can adopt LCM circuit checker to carry out each LCM circuitDetect.
Existing LCM circuit checker is mainly by central processing unit, D/A converter module, voltage detecting mouldThe composition such as piece and current detection module. In the time that needs detect LCM circuit, can be directly VSP,The voltage detecting circuit such as VBL, MTP configuration voltages, and then adopt the voltage detecting circuit configuring to LCMCircuit detects.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
Be limited to the design of existing LCM circuit checker, in the time detecting voltage shorted to earth, directly can be byLCM burns, thereby causes larger economic loss.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provide a kind of LCM circuit checker andThe method that LCM circuit is detected.
First aspect, provides a kind of LCM circuit checker, and described device comprises: central processing unit,D/A converter module and voltage detection module, described central processing unit is connected with described D/A converter module,Described D/A converter module is connected with described voltage detection module;
In described voltage detection module, be provided with multiple voltage detection units, in each voltage detection unit, arrangeHave an electromagnetic relay, described electromagnetic relay at least comprises a coil and armature;
When in the coil of described electromagnetic relay when no current, described voltage detection unit will by described armatureLiquid crystal display module LCM to be detected is connected to the first voltage gear;
In the time having electric current in the coil of described electromagnetic relay, described voltage detection unit is by described to be detectedLCM is connected to second voltage gear;
Wherein, voltage corresponding to described the first voltage gear is less than voltage corresponding to described second voltage gear.
In another embodiment of the present invention, described each voltage detection unit resistance of all connecting.
In another embodiment of the present invention, described device also comprises: current detection module;
Described current detection module is connected with described D/A converter module.
In another embodiment of the present invention, described device also comprises: display module;
Described display module is connected with described central processing unit.
In another embodiment of the present invention, described device also comprises: alarm module;
Described alarm module is connected with described central processing unit.
In another embodiment of the present invention, described device also comprises: button operation module;
Described button operation module is connected with described central processing unit.
In another embodiment of the present invention, described device also comprises: power module;
Described power module respectively with described central processing unit, described D/A converter module, described voltage detectingModule, described current detection module, described display module, described alarm module and described button operation mouldPiece is connected.
Second aspect, a kind of method that provides LCM circuit to detect, described method is applied to above-mentionedDescribed LCM checkout gear on the one hand, described method comprises:
Receive the test voltage data that described voltage detection unit sends, described test voltage data are described electricityWhile pressing detecting unit that described liquid crystal display module LCM to be detected is connected to described the first voltage gear,Described LCM to be detected is detected and obtained;
Judge whether described test voltage data are positioned at predeterminated voltage scope;
If described test voltage data are positioned at described predeterminated voltage scope, to described voltage detection unitSend the first control instruction, described the first control instruction is used for controlling described voltage detection unit by described to be checkedThe LCM surveying is connected to described second voltage gear;
If described test voltage data are not positioned at described predeterminated voltage scope, to described voltage detecting listUnit sends the second control instruction, and described the second control instruction is used for controlling described voltage detection unit and cuts off and instituteState the connection between LCM to be detected.
In another embodiment of the present invention, the test voltage that the described voltage detection unit of described reception sendsBefore data, also comprise:
Send the 3rd control instruction to described voltage detection unit, described in described the 3rd control instruction is used for controllingIt is described electromagnetic relay power supply that voltage detection unit adopts default cut-in voltage, makes described voltage detecting listFirst in init state, under described init state, no current in the coil of described electromagnetic relay,Described LCM to be detected is connected to described the first voltage gear.
In another embodiment of the present invention, described to described voltage detection unit transmission the 3rd control instructionBefore, also comprise:
For described electromagnetic relay, default cut-in voltage is set in advance, and arranges in advance for described voltage detection unitIf voltage range;
Store described default cut-in voltage and described predeterminated voltage scope.
Of the present invention another time embodiment in, describedly send second to described voltage detection unit and control and refer toAfter order, also comprise:
Send short circuit prompting message to described display module, shown by described display module.
In another embodiment of the present invention, describedly send the first control instruction to described voltage detection unitAfterwards, also comprise:
In the time receiving termination detection instruction, the voltage of described electromagnetic relay is reset to described default unlatchingVoltage.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Adopt the first voltage gear that magnitude of voltage is less to detect whether shorted to earth of LCM, when detecting LCMNot after short circuit, LCM is connected to the second voltage gear that magnitude of voltage is larger and carries out fault detect over the ground, therebyEffectively prevent that LCM from burning, saved resource.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, institute in describing embodiment belowNeed the accompanying drawing using to be briefly described, apparently, the accompanying drawing in the following describes is only the present inventionSome embodiment, for those of ordinary skill in the art, do not paying under the prerequisite of creative work,Can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of LCM circuit checker of providing of one embodiment of the invention;
Fig. 2 is the structural representation of a kind of voltage detection unit of providing of another embodiment of the present invention;
Fig. 3 is the flow process of a kind of method that LCM circuit is detected of providing of another embodiment of the present inventionFigure;
Fig. 4 is that the central processing unit that another embodiment of the present invention provides is controlled LCM electric circuit inspection processThe schematic diagram of system.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present inventionEmbodiment is described in further detail.
At present, in the production process of small-medium size liquid crystal panel, all can dispatch from the factory to every LCM circuitBefore quality testing, thereby specialty LCM circuit checker in the production process of liquid crystal panel, play toClose important effect. Because existing LCM checkout equipment self exists a lot of defects, especially to LCMMonitoring and the protection aspect of large voltage, for contraposition is required to higher LCM or electrode design high voltage appearanceThe LCM adjacent with ground connection, often can not play a very good protection, thereby causes LCM to burn, and givesEnterprises and individuals causes larger economic loss.
Electromagnetic relay is a kind of electronic control device, and it has control system (claiming again input circuit) and quiltControl system (claiming again output loop), is applied in automatic control circuit conventionally, and in fact it use less electricityStream, lower voltage remove to control a kind of automatic switch of larger electric current, higher voltage, in circuit, riseThe effects such as adjusting automatically, safeguard protection, change-over circuit. Electromagnetic relay generally by electromagnet, armature,The composition such as spring leaf, contact, its operating circuit is made up of low-voltage control circuit and high-pressure work circuit, canRealize far distance controlled and automation control. When adding certain voltage at coil two ends, in coil, just haveCertain electric current, thus galvanomagnetic-effect produced, and armature will overcome spring under the effect of electromagnetic attracting forcePulling force is inhaled to iron core, and then movable contact and stationary contact (normally opened contact) adhesive with moving armature; When coil breaksAfter electricity, the suction of electromagnetism also disappears thereupon, and armature will return to original position at the reaction force of spring,Movable contact and original stationary contact (normally-closed contact) are discharged. Adhesive by stationary contact and movable contact,Discharge, can reach the conducting in circuit, the object of cut-out.
Have problems for solving in prior art, the embodiment of the present invention is utilized electromagnetic relay characteristic, to existingLCM circuit checker improves, mistake when LCM inspection by increasing voltage detecting circuit realizationPress protection, thereby effectively reduce, product burns risk and LCM even welds undetected.
Referring to Fig. 1, the embodiment of the present invention provides a kind of LCM circuit checker, and this device comprises central authoritiesProcessor 101, D/A converter module 102 and voltage detection module 103. Wherein, central processing unit 101 isComputing center and the control centre of LCM circuit checker, for controlling LCM circuit checker pairLCM circuit detects. D/A converter module 102 respectively with central processing unit device 101 and voltage detecting mouldPiece 103 is connected, for mutual data between voltage detection module 103 and central processing unit 101 are enteredRow conversion, for example, central processing unit 101 is sent to voltage detection module 103 by D/A converter module 102Instruction transformation be the signal of telecommunication, thereby make central processing unit 101 be sent to the finger of voltage detection module 103Order can be identified by voltage detection module 103; Again for example, D/A converter module 102 is by voltage detection module 103The voltage data that is sent to central processing unit 101 is converted into data signal, thereby makes voltage detection module 103The voltage data that is sent to central processing unit 101 can be identified by central processing unit 101.
In the present embodiment, in voltage detection module 103, be provided with multiple voltage detection units, each voltageDetecting unit is a voltage detecting circuit, can detect LCM circuit to be detected. In order to preventBecause maloperation causes LCM circuit shorted to earth to be detected, in each voltage detection unit, be provided with an electricityMagnetic relay, this electromagnetic relay at least comprises a coil, armature etc. Can realize by electromagnetic relayTo the selection of two kinds of voltage gears, these two kinds of voltage gears comprise the first voltage gear and second voltage gear,The voltage that the first voltage gear is corresponding can be 1V (volt), 2V, 3V etc., the electricity that second voltage gear is correspondingPressure can be 5V, 6V, 7V etc., voltage and second voltage that the present embodiment is not corresponding to the first voltage gearThe voltage that gear is corresponding carries out concrete restriction, only needs to ensure that voltage corresponding to the first voltage gear is less than secondThe voltage that voltage gear is corresponding.
Fig. 2 is the structural representation of voltage detection unit, wherein 1 emitter stage that is triode, and 2 is triodeBase stage, 3 colelctor electrodes that are triode, 4 stationary contacts that are electromagnetic relay, 5 is electromagnetic relayAnother stationary contact, 6 coils that are electromagnetic relay. In the present embodiment, electromagnetic relay has multipleState, works as ST1=0, no current in coil after electromagnetic relay energising; Work as ST1=1, electromagnetic relay is logicalAfter electricity, in coil, there is electric current. Based on the duty of electromagnetic relay, when passing in the base stage 1 at triodeWhen larger electric current, the relation according between base current, collector current and emitter current: colelctor electrodeElectric current I C=emitter current IE=β * base current IB, the electric current in emitter and collector also increases thereupon,The now voltage drop between colelctor electrode and emitter stage very low (VCE is that 0.4V is following), colelctor electrode and transmittingConducting completely between the utmost point.
In the present embodiment, in the time of the state ST1=0 of electromagnetic relay, in the coil of electromagnetic relay without electricityStream, voltage detection unit is connected to the first voltage gear by armature by LCM to be detected, as shown in Figure 2,This first voltage gear is 5V_TEST (1.7V) shelves. Voltage detection unit detects LCM to be detected, obtainsTest voltage data, and be sent to centre after test voltage data are changed by D/A converter module 102Reason device 101, judges whether shorted to earth of these test voltage data by central processing unit 101, if judge thisTest voltage data shorted to earth, controls voltage detection unit and LCM to be detected and cuts off, if judgementGo out not shorted to earth of test voltage data, the state of central processing unit device control electromagnetic relay becomes ST1=1,Now in the coil of electromagnetic relay, there is electric current, in electromagnetic relay, produce galvanomagnetic-effect, voltage detection unitLCM to be detected is connected to second voltage gear, and this second voltage gear is normal voltage shelves.
In another embodiment of the present invention, the resistance of all connecting in each voltage detection unit, this electricityThe resistance of resistance is generally larger, starts certain guarantor can maloperation causes short circuit in LCM electric circuit inspection process timeProtect effect.
Referring to Fig. 1, LCM circuit checker also comprises current detection module 104, this current detection module104 are connected with D/A converter module 102, for detection of the electric current in LCM circuit to be detected.
Referring to Fig. 1, LCM circuit checker also comprises display module 105, this display module 105 and central authoritiesProcessor 101 is connected, and in the time that LCM to be detected is connected to the first voltage gear, processes in central authoritiesAfter device 101 is judged test voltage data shorted to earth, show the warning information that central processing unit sends,While being also connected to second voltage gear for side LCM to be detected, showing LCM circuit checkerFault detect result.
Referring to Fig. 1, LCM circuit checker also comprises alarm module 106, this alarm module 106 and central authoritiesProcessor 101 is connected, after judging test voltage data shorted to earth at central processing unit 101,Play designated tone frequency file, to point out user LCM circuit shorted to earth.
Referring to Fig. 1, LCM circuit checker also comprises button operation module 107, this button operation module107 comprise that each has the button of difference in functionality, for example, and switch key etc. This button operation module 107Be connected with central processing unit 101, can detect user institute touch controlled key, generate phase according to user institute touch controlled keyAnswer instruction, and generated instruction is sent to central processing unit 101.
Referring to Fig. 1, LCM circuit checker also comprises power module 108, this power module 108 respectively withCentral processing unit 101, D/A converter module 102, voltage detection module 103, current detection module 104,Display module 105, alarm module 106 and button operation module 107 are connected, these power module 108 useIn each functional module power supply that is LCM circuit checker.
The device that the embodiment of the present invention provides, adopts the first voltage gear that magnitude of voltage is less whether to detect LCMShorted to earth, when detecting LCM over the ground not after short circuit, is connected to by LCM the second electricity that magnitude of voltage is largerPress gear to detect, thereby effectively prevent that LCM from burning, saved resource.
The embodiment of the present invention provides a kind of method flow diagram that LCM circuit is detected, the method applicationVoltage detection unit shown in power detector shown in above-mentioned Fig. 1 and Fig. 2, referring to Fig. 3, this enforcementThe method flow that example provides comprises:
301, the test voltage data that central processing unit receiver voltage detecting unit sends.
Due to the method that LCM circuit is detected that the present embodiment provides, be mainly that LCM circuit is enteredRow short-circuit detecting, to avoid, because of maloperation LCM circuit short circuit over the ground, causing LCM to burn, and to LCMBefore circuit carries out short-circuit detecting, the test point of LCM circuit need to be connected with voltage detection unit correspondinglyConnect, and by voltage detection unit, the test point of LCM circuit is detected. Therefore, adopt voltage detectingUnit need to arrange predeterminated voltage model for voltage detection unit before the test point of LCM circuit is detectedEnclose, and default cut-in voltage is set for electromagnetic relay. While specifically setting, central processing unit can receive userInput code is set, and according to the code that arranges of user's input, for voltage detection unit arranges predeterminated voltageScope, for electromagnetic relay arranges default cut-in voltage. Wherein, the default electricity arranging for voltage detection unitPressure scope can be 1V～2V, 2V～3V etc., for the default cut-in voltage of electromagnetic relay setting be 1.5V,1.6V etc.
Except LCM circuit being carried out to short circuit inspection by the voltage that adopts voltage detection unit to detect LCM circuitOutside survey, the electric current that also can detect LCM circuit by current detection module carries out short-circuit detecting to LCM circuit.For this reason, the electric current that adopts current detection module to detect LCM circuit to LCM circuit carry out short-circuit detecting itBefore, also can be in advance for current detection module arranges a predetermined current scope. This predetermined current scope can be0mA～40mA, 20mA～60mA etc.
It should be noted that, because voltage detection module comprises multiple voltage detection units, and each voltageThe test point of the LCM circuit that detecting unit detects is different, and voltage when different test point short circuit isDifferent, therefore, the method that the present embodiment provides is the predeterminated voltage model that different voltage detection units arrangesIt is different enclosing.
For the ease of subsequent applications, be provided with predeterminated voltage scope for voltage detection unit, be electromagnetism relayAfter device is provided with default cut-in voltage, also the step of storage predeterminated voltage scope and default cut-in voltage will be carried outSuddenly while, specifically storage, default low voltage range and default cut-in voltage can be stored in corresponding memory cell.
In the present embodiment, voltage detection unit has various states, comprises and leaves detected state, normal shapeState and init state, the register value difference that different conditions is corresponding. In the present embodiment, voltage detection unitState can represent with H72_SMP, in the time of H72_SMP=0, represent voltage detection unit in leaving inspectionSurvey state, in the time of H72_SMP=1, expression voltage detection unit, in normal condition, is worked as H72_SMP=2Time, represent that voltage detection unit is in init state. Central processing unit is by calling SHORT_TESTProgram can trigger voltage detecting unit in different states.
In the time of switch key in user's touch controlled key module, LCM circuit checker is opened, and central authorities processDevice calls SHORT_TEST subprogram and generates the 3rd control instruction, and the 3rd control instruction is sent to digital-to-analogueModular converter, is sent to voltage detection unit after being changed by D/A converter module. When receiving central processing unitThe 3rd control instruction sending, it is electromagnetic relay power supply that voltage detection unit adopts default cut-in voltage, andIn init state, under init state, no current in the coil of electromagnetic relay, does not produce electromagnetismInductive effect, now voltage detection unit is connected to the first voltage gear by armature by LCM to be detected.In the time that LCM to be detected is connected to the first voltage gear, voltage detection unit detects LCM's to be detectedVoltage, obtains test voltage data, and test voltage data are sent to D/A converter module, is turned by digital-to-analogueChange voltage detection unit after module converts.
302, central processing unit judges whether test voltage data are positioned at predeterminated voltage scope, if so, andExecution step 303, if not, performs step 304.
When receiving the test voltage data of voltage detection unit transmission, central processing unit is by judging this testWhether voltage range is positioned at predeterminated voltage scope, to determine the whether shorted to earth of voltage of LCM to be detected.Specifically judgement is, central processing unit can compare the test voltage data that receive and predeterminated voltage scope,If test voltage data are positioned at predeterminated voltage scope, illustrate that the voltage of LCM to be tested is not short over the groundRoad, now can perform step 303 pairs of LCM circuit and carry out fault detect; If test voltage data are positioned in advanceIf outside voltage range, the voltage shorted to earth of LCM to be tested is described, now can perform step 304,To prevent that LCM from being burnt.
303, central processing unit sends the first control instruction to voltage detection unit, and this first control instruction is used forControl voltage detection unit LCM to be detected is connected to second voltage gear.
When judging within test voltage data are positioned at predeterminated voltage scope, central processing unit will be to voltage detectingUnit sends the first control instruction. When receiving after the first control instruction, voltage detection unit is in normal shapeState, generation current in electromagnetic relay, produces galvanomagnetic-effect in the effect of electric current, and voltage detection unit passes throughLCM to be detected is connected to second voltage gear by armature.
When LCM to be detected is connected to after second voltage gear, the electromagnetic relay two ends of voltage detection unitVoltage also become the voltage that second voltage gear is corresponding. In the time receiving termination detection instruction, central authorities processThe voltage of electromagnetic relay is reset to default cut-in voltage by device, and by the voltage range weight of voltage detection unitBe set to predeterminated voltage scope, thereby whether short circuit is prepared for start next time detects LCM.
304, central processing unit sends the second control instruction to voltage detection unit, and this second control instruction is used forControl voltage detection unit and cut off being connected between LCM to be detected.
Be positioned at outside predeterminated voltage scope when judging test voltage data, central processing unit will be to voltage detectingUnit sends the second control instruction. When receiving the second control instruction of central processing unit transmission, voltage detectingUnit cuts off being connected between LCM to be detected, burns to keep away LCM to be detected.
In addition, for timely reminding user LCM circuit shorted to earth, central processing unit also will be to display moduleSend short circuit reminder message, shown by display module. The content of wherein, short circuit reminder message can be" somewhereshort " etc.
The above-mentioned process that LCM circuit is detected, for the ease of understanding, below by with a concrete exampleSon describes for example.
Referring to Fig. 4, under off-mode, when detecting that switch key is selected, central processing unit is voltage inspectionMeasurement unit arranges predeterminated voltage scope, for electromagnetic relay arranges default cut-in voltage. Afterwards, central authorities processDevice calls SHORT_TEST subprogram, sends the 3rd control instruction to voltage detection unit, makes voltage inspectionMeasurement unit is in init state, and voltage detection unit is connected to the first electricity by armature by LCM to be detectedPress gear. Voltage detection unit obtains the test voltage data of LCM to be detected, and by test voltage dataBe sent to central processing unit, central processing unit judges that test voltage data are whether within the scope of predeterminated voltage, asFruit test voltage data, within the scope of predeterminated voltage, connect LCM to be detected to treat that second voltage gear entersRow fault detect, if test voltage data, not within the scope of predeterminated voltage, are carried out alarm, andOn display module, show " somewhereshort " etc.
The method that the embodiment of the present invention provides, adopts the first voltage gear that magnitude of voltage is less whether to detect LCMShorted to earth, when detecting LCM over the ground not after short circuit, is connected to by LCM the second electricity that magnitude of voltage is largerPress gear to detect, thereby effectively prevent that LCM from burning, saved resource.
It should be noted that: the LCM circuit checker that above-described embodiment provides is carrying out LCM circuitWhen detection, be only illustrated with the division of above-mentioned each functional module, in practical application, can be according to needWant and above-mentioned functions distribution is completed by different functional modules, by the internal junction of LCM circuit checkerStructure is divided into different functional modules, to complete all or part of function described above. In addition, above-mentionedThe LCM circuit checker that embodiment provides belongs to same with the embodiment of the method that LCM circuit is detectedOne design, its specific implementation process refers to embodiment of the method, repeats no more here.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can pass throughHardware completes, and also can carry out the hardware that instruction is relevant by program and complete, and described program can be stored inIn a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only storage, disk orCD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all of the present inventionWithin spirit and principle, any amendment of doing, be equal to replacement, improvement etc., all should be included in of the present inventionWithin protection domain.
Claims (12)
1. a LCM circuit checker, is characterized in that, described device comprises: central processing unit,D/A converter module and voltage detection module, described central processing unit is connected with described D/A converter module,Described D/A converter module is connected with described voltage detection module;
In described voltage detection module, be provided with multiple voltage detection units, in each voltage detection unit, arrangeHave an electromagnetic relay, described electromagnetic relay at least comprises a coil and armature;
When in the coil of described electromagnetic relay when no current, described voltage detection unit will by described armatureLiquid crystal display module LCM to be detected is connected to the first voltage gear;
In the time having electric current in the coil of described electromagnetic relay, described voltage detection unit is by described to be detectedLCM is connected to second voltage gear;
Wherein, voltage corresponding to described the first voltage gear is less than voltage corresponding to described second voltage gear.
2. device according to claim 1, is characterized in that, described each voltage detection unit is all gone here and thereJoin a resistance.
3. device according to claim 1, is characterized in that, described device also comprises: current detectingModule;
Described current detection module is connected with described D/A converter module.
4. device according to claim 1, is characterized in that, described device also comprises: display module;
Described display module is connected with described central processing unit.
5. device according to claim 1, is characterized in that, described device also comprises: alarm module;
Described alarm module is connected with described central processing unit.
6. device according to claim 1, is characterized in that, described device also comprises: button operationModule;
Described button operation module is connected with described central processing unit.
7. described in arbitrary claim in claim 1 to 6, install, it is characterized in that, described deviceAlso comprise: power module;
Described power module respectively with described central processing unit, described D/A converter module, described voltage detectingModule, described current detection module, described display module, described alarm module and described button operation mouldPiece is connected.
8. method LCM circuit being detected, is characterized in that, described in described method is applied toLCM circuit checker, described method comprises:
Receive the test voltage data that described voltage detection unit sends, described test voltage data are described electricityWhile pressing detecting unit that described liquid crystal display module LCM to be detected is connected to described the first voltage gear,Described LCM to be detected is detected and obtained;
Judge whether described test voltage data are positioned at predeterminated voltage scope;
If described test voltage data are positioned at described predeterminated voltage scope, to described voltage detection unitSend the first control instruction, described the first control instruction is used for controlling described voltage detection unit by described to be checkedThe LCM surveying is connected to described second voltage gear;
If described test voltage data are not positioned at described predeterminated voltage scope, to described voltage detecting listUnit sends the second control instruction, and described the second control instruction is used for controlling described voltage detection unit and cuts off and instituteState the connection between LCM to be detected.
9. method according to claim 8, is characterized in that, the described voltage detection unit of described receptionBefore the test voltage data that send, also comprise:
Send the 3rd control instruction to described voltage detection unit, described in described the 3rd control instruction is used for controllingIt is described electromagnetic relay power supply that voltage detection unit adopts default cut-in voltage, makes described voltage detecting listFirst in init state, under described init state, no current in the coil of described electromagnetic relay,Described LCM to be detected is connected to described the first voltage gear.
10. method according to claim 9, is characterized in that, described to described voltage detection unitBefore sending the 3rd control instruction, also comprise:
For described electromagnetic relay, default cut-in voltage is set in advance, and arranges in advance for described voltage detection unitIf voltage range;
Store described default cut-in voltage and described predeterminated voltage scope.
11. methods according to claim 8, is characterized in that, described to described voltage detection unitAfter sending the second control instruction, also comprise:
Send short circuit prompting message to described display module, shown by described display module.
Method in 12. according to Claim 8 to 11 described in arbitrary claim, is characterized in that, described inAfter described voltage detection unit sends the first control instruction, also comprise:
In the time receiving termination detection instruction, the voltage of described electromagnetic relay is reset to described default unlatchingVoltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610073636.8A CN105606992B (en) | 2016-02-02 | 2016-02-02 | LCM circuit checker and the method that LCM circuit is detected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610073636.8A CN105606992B (en) | 2016-02-02 | 2016-02-02 | LCM circuit checker and the method that LCM circuit is detected |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105606992A true CN105606992A (en) | 2016-05-25 |
| CN105606992B CN105606992B (en) | 2018-12-25 |
Family
ID=55987075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610073636.8A Active CN105606992B (en) | 2016-02-02 | 2016-02-02 | LCM circuit checker and the method that LCM circuit is detected |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105606992B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568303A (en) * | 2019-09-26 | 2019-12-13 | 杭州凡诺电子有限公司 | Test system for LCM-Mesh line function detection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203232092U (en) * | 2013-05-06 | 2013-10-09 | 深圳市森力普电子有限公司 | PCB voltage test circuit and tool |
| EP2669693A1 (en) * | 2012-03-02 | 2013-12-04 | Huawei Technologies Co., Ltd. | Parallel operation wire fault detection device and system |
| CN204215116U (en) * | 2014-11-25 | 2015-03-18 | 昆山龙腾光电有限公司 | Liquid crystal display module proving installation |
| CN104616614A (en) * | 2014-11-28 | 2015-05-13 | 合肥京东方光电科技有限公司 | Power-on method and device and detection method and device of display module |
| CN104635102A (en) * | 2013-11-14 | 2015-05-20 | 富泰华工业（深圳）有限公司 | Electronic component detection device and detection method thereof |
-
2016
- 2016-02-02 CN CN201610073636.8A patent/CN105606992B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2669693A1 (en) * | 2012-03-02 | 2013-12-04 | Huawei Technologies Co., Ltd. | Parallel operation wire fault detection device and system |
| CN203232092U (en) * | 2013-05-06 | 2013-10-09 | 深圳市森力普电子有限公司 | PCB voltage test circuit and tool |
| CN104635102A (en) * | 2013-11-14 | 2015-05-20 | 富泰华工业（深圳）有限公司 | Electronic component detection device and detection method thereof |
| CN204215116U (en) * | 2014-11-25 | 2015-03-18 | 昆山龙腾光电有限公司 | Liquid crystal display module proving installation |
| CN104616614A (en) * | 2014-11-28 | 2015-05-13 | 合肥京东方光电科技有限公司 | Power-on method and device and detection method and device of display module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568303A (en) * | 2019-09-26 | 2019-12-13 | 杭州凡诺电子有限公司 | Test system for LCM-Mesh line function detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105606992B (en) | 2018-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201993444U (en) | Relay testing device and system | |
| CN102890235A (en) | Fault detection method and device | |
| CN103680274A (en) | Automatic detection method and device for connection wire of electrical experimental facility | |
| CN204044202U (en) | A kind of power failure changes the Apparatus and system of electric energy meter | |
| CN105092998A (en) | Interface detection circuit, device and method | |
| CN101262683B (en) | A simulation testing system and method for electric modulation antenna protocol software | |
| CN103837782A (en) | Detection device of data line | |
| CN111289817A (en) | Method, device and system for monitoring faults of electric appliance and storage medium | |
| CN105606992A (en) | LCM circuit detection apparatus and method for detecting LCM circuit | |
| CN104181496A (en) | Test device | |
| CN206945939U (en) | A kind of detection means of display device for short circuit | |
| CN103676940A (en) | Function detection system and method for digital control panel | |
| CN203673060U (en) | General detection tool for carrier modules | |
| CN204065355U (en) | Primary cut-out coil intelligent detection device | |
| CN103680106A (en) | Intelligent air switch system | |
| CN101345436A (en) | Intelligent controller with note function | |
| CN104954046A (en) | Transmission method and device thereof based on power line communication | |
| CN102854452B (en) | Printed circuit board assembly (PCBA) function testing device and testing method thereof | |
| CN116184875A (en) | Electric automobile simulator design and use method based on inverter technology | |
| CN109164379A (en) | A kind of relay multidiameter option switch circuit and test macro with interlock function | |
| CN104678349A (en) | Interface detection device for electric energy meter and system of interface detection device | |
| CN201903625U (en) | Testing device for polarization power circuit board | |
| CN211349678U (en) | Acquisition terminal equipment with user-defined fault setting function | |
| CN205679991U (en) | A kind of vehicle control unit of electric vehicle comprehensive detection system | |
| CN201449545U (en) | Equipment for intelligently detecting electronic control system programs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |