CN2810071Y - Intelligent tester for overcurrent of protector - Google Patents
Intelligent tester for overcurrent of protector Download PDFInfo
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- CN2810071Y CN2810071Y CN 200520043783 CN200520043783U CN2810071Y CN 2810071 Y CN2810071 Y CN 2810071Y CN 200520043783 CN200520043783 CN 200520043783 CN 200520043783 U CN200520043783 U CN 200520043783U CN 2810071 Y CN2810071 Y CN 2810071Y
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Abstract
The utility model relates to a device of an electronic tester, particularly an intelligent over-current tester of a protector which is used for testing a positive temperature coefficient PTC electronic element which is used for over-current protection in a protector and protecting a fixed telephone exchange and has the function of displaying an over-current protection element in direct reading type. The device is composed of a microprocessor controller, a controller, a display and key module, a power supply, an adjustable resistor matrix, a relay circuit, a commercial power, a double-positive temperature coefficient module in a tested protector, etc., wherein the microprocessor controller is composed of integrated circuits and the controller is composed of integrated chips. The utility model mainly solves the technical problems that how to test the action time of a PTC rapidly, how to display the recovery time of a double-PTC resistor in direct reading type, etc. The utility model has the advantages that the utility model completes the test function by the controller composed of microprocessors, reads the action time by digital direct reading type and has the function of self test. The utility model can test all the hardwares, etc. The utility model is helpful to ensure the quality of product release and use maintenance.
Description
Technical field
The utility model relates to a kind of electronic tester; the positive temperature coefficient PTC electronic component that overcurrent protection is used in the test protector; especially refer to a kind ofly be widely used in protecting in the landline telephone switch, can direct-reading show that be the protector overcurrent intelligence test apparatus of comprehensive function such as current limiting characteristic the operate time of overflow protecting element positive temperature coefficient PTC.
Background technology
Measuring positive temperature coefficient PTC element during operate time at present, all adopt external storage oscilloscope and manual adjustments variable resistor, at first variable resistor is adjusted to a good numerical value of calculated in advance, so that alternating current flow valuve (1A when obtaining 4 kinds of different actions that require, 3A, 0.35A, 0.5A), PTC by electric current after the heating resistor value promptly rise, current value descends thereupon, be called action when reducing to setting, this electric current decline process gives display graphics with storage oscilloscope, and the manual observation figure is read operate time.From visible its obvious defects of above-mentioned testing procedure is that troublesome poeration is time-consuming, precision is not high, it is bigger that variable resistor is regulated time error, oscilloscope is shown as analog, low precision during reading, mains fluctuations cause error and all considerations of the resistance change of PTC own, and manual adjustments variable resistor error is also bigger; Cost an arm and a leg in addition.
Summary of the invention
In order to overcome above-mentioned weak point, main purpose of the present utility model aims to provide a kind of employing microprocessor electronic technology and data processing technique, measure PTC operate time quickly and accurately, and have the protector overcurrent intelligence test device of comprehensive overcurrent measurement functions such as PTC measures recovery time, the 3A of anti-power current voltage 220V, bifilar resistor measurement concurrently.
The technical problems to be solved in the utility model is: solve also smart treadle-operated tilt hammer for hulling rice ground measurement PTC operate time how fast, how digital direct-reading shows, and can be to two PTC follow-on tests on the AB line, and two results show problem together; How solve and have the time test that recovers resistance, the 3A of anti-the electric current the time concurrently in 20 tests of 220V circulation and two PTC resistance measurement problems except display action; How to solve result to the PTC motion time measurement, automatically and national standard compare, as qualified bright OK green light,, needn't go to consult the every index problem in the standard again as defective bright NOK red light; Solve and how various parameters to be set driving PTC, it is that non-question and answer mode is selected that numerous parameters is adopted soft telegraph key, parameter can be remembered automatically once being provided with, the PTC such as the test parameter of test are identical later on, just be not provided with separately, as long as a key is just logical, to relevant technologies problems such as test in enormous quantities can save time.
The technical scheme that its technical problem that solves the utility model adopts is: the microprocessor controller that this device is made of integrated circuit, integrated display of forming and modules such as key shelf, A/D modular converter, interface circuit, relay and power supply are formed, in device, be provided with the printed board that integrated circuit constitutes, comprise:
Two positive temperature coefficient modules etc. in controller, demonstration and telegraph key module, power supply, adjustable resistance matrix, relay circuit, civil power and the tested protector; Wherein:
Microprocessor CPU control port in the controller, scanning display port, Peripheral Interface port, driver module port and analog-to-digital conversion module port are connected with the corresponding port of demonstration with telegraph key module, power supply, adjustable resistance matrix, relay circuit respectively;
Its control signal is connected with the port of demonstration with the telegraph key module via reset line R1, R2, and its control signal is connected with photocoupler OSC port via relay J 2 ports;
Its gated sweep key shelf signal is connected with the contact matrix ports with decoder respectively via data wire;
Its drive signal is connected with 16 miniature relay contacts respectively via relay circuit;
Its analog-to-digital conversion signal is connected with power supply, adjustable resistance matrix ports respectively via fan-shaped circuit, and adjustable resistance matrix output signal is connected with two positive temperature coefficient modules in the tested protector by test port respectively;
The civil power port is connected with the AC/DC converter port of power supply respectively;
Outside device, be provided with the panel figure of telegraph key band lamp.
The controller circuitry of described protector overcurrent intelligence test device is by integrated microprocessor CPU U1, decoder U2, lock U3, program curing module U4, multi-thread serial port U5, A/D converter U6, peripheral parallel interface U7, U13, inverter U8, U15, Peripheral Interface U9, U10, module such as U11 and U12 is formed, wherein: the pin 21 of microprocessor CPU U1,22,23,24,25,26 and 27 respectively with the pin 25 of program curing module U4,24,21,23,2,26 are connected with 1, the pin 22 of microprocessor CPU U1 is connected with 2 with the pin 3 of decoder U2 respectively again with 21, and the pin 26 of U1 is connected with the pin 1 of decoder U2 via the U8 inverter;
The data bus pins 32 of microprocessor CPU U1,33,34,35,36,37,38,39 respectively with the pin 18 of lock U3,17,14,13,8,7,4,3 and the pin 19 of program curing module U4,18,17,16,15,13,12,11 and the pin 19 of multi-thread serial port U5,18,17,16,15,14,13,12 and the pin 11 of A/D converter U6,12,13,14,15,16,17,18 and the pin 27 of peripheral parallel interface U7,28,29,30,31,32,33,34 and the pin 27 of peripheral parallel interface U13,28,29,30,31,32,33,34 parallel mutually connections;
The pin 29 of microprocessor CPU U1 is connected with the pin 22 of program curing module U4;
The pin 13 of microprocessor CPU U1 is connected with the pin 4 of multi-thread serial port U5 via inverter U8;
The pin 30 of microprocessor CPU U1 is connected with the pin 3 of the pin 11 of lock U3 and multi-thread serial port U5;
The pin 4 of microprocessor CPU U1 is connected with the DK circuit J1 port of demonstration and telegraph key module via inverter U15;
The pin 16 of microprocessor CPU U1 is connected with the pin 3 of A/D converter U6, and the one road is connected with the pin 11 of multi-thread serial port U5, and another road is connected with the pin 36 of peripheral parallel interface U7, U13 respectively;
The pin 3 of microprocessor CPU U1 is connected with the DK circuit J2 port of demonstration and telegraph key module via inverter U8;
A road of the pin 17 of microprocessor CPU U1 is connected with multi-thread serial port U5 pin 10, and another road is connected with the pin 2 and pin 5 of peripheral parallel interface U13 and the pin 5 of peripheral parallel interface U7 of A/D converter U6 respectively;
The pin 12 of microprocessor CPU U1 is connected with the pin 5 of A/D converter U6;
A road of the pin 9 of microprocessor CPU U1 is connected with the pin 9 of multi-thread serial port U5 respectively with after the pin 35 of parallel pin 35 that meets U13 in periphery and peripheral parallel interface U7 links to each other again, another road via inverter U8 after respectively via capacitor C 5 and 5V power supply just be connected with earth connection via resistance R 2;
The pin 5 of microprocessor CPU U1 is connected with the pin 3 of resistor chain RP, and the pin 1 of resistor chain RP is connected with the 5V power supply;
The pin 7,8 of microprocessor CPU U1 is connected with an end of K switch 2.2 and K switch 2.1 respectively, and the other end of K switch 2.2 and K switch 2.1 is ground connection respectively;
The pin 19 of microprocessor CPU U1 is connected with an end of capacitor C 4 and crystal oscillator respectively, its pin 20 a road with capacitor C 1, C2 and the end after connecing be connected, intermediate point after the serial connection of another road and capacitor C 3, C4 is connected, and its pin 18 is connected with the other end of capacitor C 3 and crystal oscillator respectively;
The pin 31 of microprocessor CPU U1 is connected with the line of K switch 1.1 with K switch 1.2, the other end ground connection of K switch 1.1, another termination power of K switch 1.2;
The pin 40 of microprocessor CPU U1 is connected with positive 5V power supply via the other end of capacitor C 1, C2 respectively;
The pin 7 of decoder U2 is connected with the pin 1 of A/D converter U6, its pin 6 is connected with the pin 6 of peripheral parallel interface U7, and its pin 5 is connected with the pin 6 of peripheral parallel interface U13, and its pin 4 is connected with multi-thread serial port U5 pin 22, its pin 8 ground connection, its pin 16 connects power supply;
The pin 19,16,15,12,9,6,5,2 of lock U3 is connected with the pin 3,4,5,6,7,8,9,10 of program curing module U4 is parallel mutually respectively, and its pin 10 is with pin 1 and connect back ground connection, and its pin 20 connects power supply;
The pin 14 of program curing module U4 is with pin 20 and connect back one tunnel ground connection, another road is connected with the end of capacitor C 7, C6 respectively, its pin 28 is connected with positive 5V power supply via the other end of capacitor C 7, C6, the pin 10 of U4 is connected with the pin 21 of multi-thread serial port U5 and the pin 9 of peripheral parallel interface U7, U13 respectively, and the pin 9 of U4 is connected with the pin 8 of peripheral parallel interface U7, U13 respectively;
The pin 20 of multi-thread serial port U5 via the end of capacitor C 8, C9 after ground connection, pin 40 is connected with positive 5V power supply via the other end of capacitor C 8, C9;
The pin 19 of A/D conversion U6 is connected ground via after resistance R 3 and the capacitor C 12, its pin 4 is connected with the serial connection point of resistance R 3 and capacitor C 12, its pin 6 is connected with A/D contact on the power panel with resistance R 5 backs via resistance R 4, diode D1 is connected with resistance R 5 serial connections point with resistance R 4 with the serial connection point of diode D2, its pin 7,8 also connects back one tunnel ground connection, another road is connected with the end of capacitor C 17, C18, and its pin 20 is connected with positive 5V power supply via the other end of capacitor C 17, C18;
The pin 11 of peripheral parallel interface U7,10,18,19 respectively with the pin 1 of Peripheral Interface U11,2,3,4 parallel mutually connections, its pin 20,21,22 respectively with the pin ST of DK circuit, OT, R is connected, its pin 38,39,40,1,2,3,4 respectively with the pin 7 of Peripheral Interface U9,6,5,4,3,2,1 parallel mutually the connection, its pin 37,14,15,16,17,13,12 respectively with the pin 1 of Peripheral Interface U10,2,3,4,5,6,7 parallel mutually connections, its pin 7 one tunnel ground connection, another road and capacitor C 14, the end of C13 is connected, and its pin 26 is via capacitor C 14, the other end of C13 is connected with positive 5V power supply;
The pin 16,15,14,13,12,11,10 of Peripheral Interface U9 is connected with an end of the pin 1,2,3,4,5,6,7 of relay R L respectively, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 16,15,14,13,12,11,10 of Peripheral Interface U10 is connected with an end of the pin 8,9,10,11,12,13,14 of relay R L respectively, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 7,6,5 of Peripheral Interface U11 is connected with the pin 2,3,4 of peripheral parallel interface U13 is parallel mutually respectively, its pin 16,15,14,13,12,11,10 is connected with an end of the pin 15,16,17,18,19,20,21 of relay R L respectively, its pin 8 ground connection, pin 9 connects positive 12V power supply;
The pin 1,2 of Peripheral Interface U12 is connected with the pin 1,40 of peripheral parallel interface U13 is parallel mutually respectively, and its pin 16 is connected with an end of the pin 22 of relay RL, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 20,24,23 of peripheral parallel interface U13 is connected with NO signal end, signal end E and the BC signal end of DK circuit respectively, its pin 7 one tunnel ground connection, another road is connected with the end of capacitor C 20, C19, and its pin 26 is connected with positive 5V power supply via the other end of capacitor C 20, C19.
The power supply of described protector overcurrent intelligence test device comprises: ac high-voltage and dc low-voltage two partly are made up of modules such as base plate, friendship/straight modular converter, energy supply control module and relay circuits, wherein:
Energy supply control module comprises: bidirectional triode thyristor SCR module and photocoupler OSC module, the output of bidirectional triode thyristor SCR module and its capacitor C 11, C12 and resistance R 22 are connected in series a back and photocoupler OSC module end connected with each other successively and are connected, be connected with the output of bidirectional triode thyristor SCR module after its other end and resistance R 20 serial connections, photocoupler OSC module is connected with the J2 port of cpu circuit again.
The relay circuit of described protector overcurrent intelligence test device is made up of 16 parts such as miniature relay, wherein:
Miniature relay RL1-10 is one pair of changeover contact, relay R L11 is Second Mate's changeover contact, relay R L13-16 is Second Mate's changeover contact, the corresponding contact of relay R L1-9 is connected with each other with the end points of binary system adjustable resistance matrix respectively, the one end points is connected with an input of two positive temperature coefficient modules in the tested protector, its another end points is connected with an end points of bidirectional triode thyristor SCR module, and the corresponding contact of relay R L13-16 is connected with fan-shaped circuit one input of AC/DC transducer AD line.
The demonstration of described protector overcurrent intelligence test device and telegraph key module by control panel and printed board after module such as plate form, wherein:
87 sections charactrons are installed on the plate after the printed board, 8 control line D1-8 are interconnected by the corresponding endpoint of 2 7407 in-phase amplifiers in the corresponding endpoint of multi-thread serial port U5 among the CPU and the circuit, 8 section points of control charactron, the corresponding endpoint of 8 control line D1-8 and every charactron is and connects that the pin 34,33,32 of the multi-thread serial port U5 among the CPU is connected with the pin 3,2,1 of decoder U23;
12 band lamp telegraph keys are installed, 10 R wherein, OT on the control panel, ED, BC, NO, SL, YS, CL, sky, ST telegraph key contact becomes 5 * 2 matrixes, and 3 lines of front connect the output from decoder U23, three-way have pulse in scan round, runs into the telegraph key contact by closing, and line of return F1, F2 are connected to the corresponding endpoint of multi-thread serial port U5 in the controller, 2 is PW power key and RST reset key in addition, and it directly is connected to the corresponding endpoint of CPU via line R1, R2, and the power key lamp directly is communicated with the 5V power supply.
The adjustable resistance matrix of described protector overcurrent intelligence test device is one group of series electrical cohort, resistance on the resistance board is unified to be a kind of power, the end points of adjustable resistance matrix is connected with each other with the corresponding contact of relay R L1-9 respectively, the one end points is connected with an input of two positive temperature coefficient modules in the tested protector, and its another end points is connected with an end points of bidirectional triode thyristor SCR module.
It is the control core device that the utility model adopts with the microprocessor, control adjustable resistance matrix, panel operation, the multimetering head, in order to the various properties of flow of crossing of the positive temperature coefficient element PTC of test in the protector, as comprehensive intelligence instruments such as operate time of PTC, resistance recovery time, the test of anti-current cycle, two resistance measurements; Wherein emphasis is the PTC motion time measurement.
The utility model adopts the automatic and adjustable resistor matrix, it is with relay tip and connects binary system resistance, constitutes 2 to 1022 Ω resistance values, and every block resistance value span is 2 Ω, adapt to different measuring current requirements with this, replace traditional manual Artificial Control slidingtype variable resistor.Above-mentioned adjustable resistance matrix repeat circuit contact is that closed the reaching of zero current separated, and when junction closure, treat just to pass through electric current after the closure.Before contact separates, cut off electric current earlier, just separate contact.The switching of electric current is by power controlled silicon control in two-way.Therefore relay tip reliability and long-life have been guaranteed.
The utility model is multimetering, adopts analog to digital converter as gage outfit, does multimetering through fan-shaped circuit timesharing, and circuit-under-test all is analog circuits so adopt the measurement of analog to digital converter double as used.In this instrument, to survey civil power 220V alternating voltage, will survey the resistance of PTC, more will survey the instantaneous value that the PTC electric current changes.So need multimetering, this fan-shaped circuit also is to be made of relay circuit.
The fast cycle measurement of the instantaneous value that the utility model positive temperature coefficient PTC electric current changes adopts per 10 milliseconds to survey the primary current pressure drop, and contrasts with the specified minimum current voltage drop that limits, as is equal to or less than this value, promptly stops fast cycle and detects.
Test is not subjected to the variation of line voltage and positive temperature coefficient PTC resistance change and influences, because the resistance of mentioned variable resistor matrix is to be generated fast by CPU in the controller by line voltage, positive temperature coefficient PTC resistance, utilization Ohm's law that the multimetering head records.
Tested positive temperature coefficient PTC can comprise various types of communication with positive temperature coefficient PTC such as organic PTC, ceramic PTC, shunting integrated circuit type protector.The resistance range of positive temperature coefficient PTC can be from 2 Ω to 62 Ω, all communication positive temperature coefficient PTC of all standing.
The soft telegraph key of parameter adopts, and this instrument will relate to than multi-parameter, and the selection parameter is not employing one parameter, one telegraph key but adopts two public keys, the one, parameter options button SL another for choosing key YS, click SL and promptly show a possible parameter, as be correct, then press YS.Can reduce telegraph key quantity like this, simplify the operation.Testing element in enormous quantities as the parameter request unanimity, then only requires parameter is set for the first time, can remember automatically later on, only need be by a key with regard to energy measurement.
The result and the national standard of positive temperature coefficient PTC motion time measurement contrast automatically, as then the OK lamp is bright to be equal to or less than standard, otherwise the NOK lamp is bright, and survey crew needn't be consulted document related information.
Itself has self-test function, can test whole hardware, comprising display lamp and charactron, relay, resistance, controllable silicon etc.This is of value to the quality that guarantees product export and working service.
The beneficial effects of the utility model are: finish test function with the controller that microprocessor constitutes, read operate time with digital direct-reading type, replace from waveform and come the identification maneuver time; Replace artificial adjustable resistance with the automatic and adjustable resistor matrix, thereby on speed and precision, be raising; But instrument dual-element PTC tie-in, test result can be automatically and the national standard contrast whether qualified; Safeguarding to use to have self-test function, can detect hardware; For the test parameter setting, adopt soft telegraph key question and answer mode operation; Parameter is promptly given memory once being provided with, and only need just can get the result by a key later on; Have self-test function, can test whole hardware, comprising display lamp and charactron, relay, resistance, controllable silicon etc., this is of value to the quality that guarantees product export and working service.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing 2 is the circuit theory diagrams of the utility model controller;
Accompanying drawing 3 is the utility model power circuit principle and structure block diagram;
Accompanying drawing 4 is the utility model relay circuit schematic diagram;
Accompanying drawing 5 shows and telegraph key modular circuit schematic diagram for the utility model;
Accompanying drawing 6 is the utility model adjustable resistance matrix circuit principle and structure block diagram;
Label declaration in the accompanying drawing:
The 10-controller;
The 1-microprocessor CPU;
2-scans demonstration;
The 3-Peripheral Interface;
The 4-driver module;
The 5-analog-to-digital conversion module;
20-shows and telegraph key;
The 30-power supply;
The 301-base plate;
302-hands over/straight modular converter;
The 304-energy supply control module;
40-adjustable resistance matrix;
The 50-relay circuit;
The 60-civil power;
Two positive temperature coefficients in the tested protector of 70-;
Embodiment
See also shown in the accompanying drawing 1,2,3,4,5,6, the microprocessor controller that the utility model is made of integrated circuit, integrated display of forming and modules such as key shelf, A/D modular converter, interface circuit, relay and power supply are formed, in device, be provided with the printed board that integrated circuit constitutes, comprise:
Two positive temperature coefficient (70) modules etc. in controller (10), demonstration and telegraph key (20) module, power supply (30), adjustable resistance matrix (40), relay circuit (50), civil power (60) and the tested protector; Wherein:
Microprocessor CPU (1) control port in the controller (10), scanning show that (2) port, Peripheral Interface (3) port, driver module (4) port and analog-to-digital conversion module (5) port are connected with the corresponding port of demonstration with telegraph key (20) module, power supply (30), adjustable resistance matrix (40), relay circuit (50) respectively;
Its control signal is connected with the port of demonstration with telegraph key (20) module via reset line R1, R2, and its control signal is connected with photocoupler OSC port via relay J 2 ports;
Its gated sweep key shelf signal is connected with the contact matrix ports with decoder respectively via data wire; Its drive signal is connected with 16 miniature relay contacts respectively via relay circuit (50);
Its analog-to-digital conversion signal is connected with power supply (30), adjustable resistance matrix (40) port respectively via fan-shaped circuit, and adjustable resistance matrix (40) output signal is connected with two positive temperature coefficient (70) modules in the tested protector by test port respectively;
Civil power (60) port is connected with the AC/DC converter port of power supply (30) respectively;
Outside device, be provided with the panel figure of telegraph key band lamp.
See also shown in the accompanying drawing 2, controller (10) circuit of described protector overcurrent intelligence test device is made up of modules such as integrated microprocessor CPU (1) U1, decoder U2, lock U3, program curing module U4, multi-thread serial port U5, A/D converter U6, peripheral parallel interface U7, U13, inverter U8, U15, Peripheral Interface U9, U10, U11 and U12, wherein:
The pin 21,22,23,24,25,26 of microprocessor CPU (1) U1 is connected with 1 with the pin 25,24,21,23,2,26 of program curing module U4 respectively with 27, the pin 22 of microprocessor CPU (1) U1 is connected with 2 with the pin 3 of decoder U2 respectively again with 21, and the pin 26 of U1 is connected with the pin 1 of decoder U2 via the U8 inverter;
The data bus pins 32 of microprocessor CPU (1) U1,33,34,35,36,37,38,39 respectively with the pin 18 of lock U3,17,14,13,8,7,4,3 and the pin 19 of program curing module U 4,18,17,16,15,13,12,11 and the pin 19 of multi-thread serial port U5,18,17,16,15,14,13,12 and the pin 11 of A/D converter U6,12,13,14,15,16,17,18 and the pin 27 of peripheral parallel interface U7,28,29,30,31,32,33,34 and the pin 27 of peripheral parallel interface U13,28,29,30,31,32,33,34 parallel mutually connections;
The pin 29 of microprocessor CPU (1) U1 is connected with the pin 22 of program curing module U4;
The pin 13 of microprocessor CPU (1) U1 is connected with the pin 4 of multi-thread serial port U5 via inverter U8;
The pin 30 of microprocessor CPU (1) U1 is connected with the pin 3 of the pin 11 of lock U3 and multi-thread serial port U5;
The pin 4 of microprocessor CPU (1) U1 is connected with the DK circuit J1 port of demonstration and telegraph key (20) module via inverter U15;
The pin 16 of microprocessor CPU (1) U1 is connected with the pin 3 of A/D converter U6, and the one road is connected with the pin 11 of multi-thread serial port U5, and another road is connected with the pin 36 of peripheral parallel interface U7, U13 respectively;
The pin 3 of microprocessor CPU (1) U1 is connected with the DK circuit J2 port of demonstration and telegraph key (20) module via inverter U8;
A road of the pin 17 of microprocessor CPU (1) U1 is connected with multi-thread serial port U5 pin 10, and another road is connected with the pin 2 and pin 5 of peripheral parallel interface U13 and the pin 5 of peripheral parallel interface U7 of A/D converter U6 respectively;
The pin 12 of microprocessor CPU (1) U1 is connected with the pin 5 of A/D converter U6;
A road of the pin 9 of microprocessor CPU (1) U1 is connected with the pin 9 of multi-thread serial port U5 respectively with after the pin 35 of the pin 35 of peripheral parallel interface U13 and peripheral parallel interface U7 links to each other again, another road via inverter U8 after respectively via capacitor C 5 and positive 5V power supply be connected with earth connection via resistance R 2;
The pin 5 of microprocessor CPU (1) U1 is connected with the pin 3 of resistor chain RP, and the pin 1 of resistor chain RP is connected with positive 5V power supply;
The pin 7,8 of microprocessor CPU (1) U1 is connected with an end of K switch 2.2 and K switch 2.1 respectively, and the other end of K switch 2.2 and K switch 2.1 is ground connection respectively;
The pin 19 of microprocessor CPU (1) U1 is connected with an end of capacitor C 4 and crystal oscillator respectively, its pin 20 a road with capacitor C 1, C2 and the end after connecing be connected, intermediate point after the serial connection of another road and capacitor C 3, C4 is connected, and its pin 18 is connected with the other end of capacitor C 3 and crystal oscillator respectively;
The pin 31 of microprocessor CPU (1) U1 is connected with the line of K switch 1.1 with K switch 1.2, the other end ground connection of K switch 1.1, another termination power of K switch 1.2;
The pin 40 of microprocessor CPU (1) U1 is connected with positive 5V power supply via the other end of capacitor C 1, C2 respectively;
The pin 7 of decoder U2 is connected with the pin 1 of A/D converter U6, its pin 6 is connected with the pin 6 of peripheral parallel interface U7, and its pin 5 is connected with the pin 6 of peripheral parallel interface U13, and its pin 4 is connected with multi-thread serial port U5 pin 22, its pin 8 ground connection, its pin 16 connects power supply;
The pin 19,16,15,12,9,6,5,2 of lock U3 is connected with the pin 3,4,5,6,7,8,9,10 of program curing module U4 is parallel mutually respectively, and its pin 10 is with pin 1 and connect back ground connection, and its pin 20 connects power supply;
The pin 14 of program curing module U4 is with pin 20 and connect back one tunnel ground connection, another road is connected with the end of capacitor C 7, C6 respectively, its pin 28 is connected with positive 5V power supply via the other end of capacitor C 7, C6, the pin 10 of U4 is connected with the pin 21 of multi-thread serial port U5 and the pin 9 of peripheral parallel interface U7, U13 respectively, and the pin 9 of U4 is connected with the pin 8 of peripheral parallel interface U7, U13 respectively;
The pin 20 of multi-thread serial port U5 via the end of capacitor C 8, C9 after ground connection, pin 40 is connected with positive 5V power supply via the other end of capacitor C 8, C9;
The pin 19 of A/D converter U6 is connected ground via after resistance R 3 and the capacitor C 12, its pin 4 is connected with the serial connection point of resistance R 3 and capacitor C 12, its pin 6 is connected with A/D contact on the power panel with resistance R 5 backs via resistance R 4, diode D1 is connected with resistance R 5 serial connections point with resistance R 4 with the serial connection point of diode D2, its pin 7,8 also connects back one tunnel ground connection, another road is connected with the end of capacitor C 17, C18, and its pin 20 is connected with positive 5V power supply via the other end of capacitor C 17, C18;
The pin 11 of peripheral parallel interface U7,10,18,19 respectively with the pin 1 of Peripheral Interface U11,2,3,4 parallel mutually connections, its pin 20,21,22 respectively with the pin ST of DK circuit, OT, R is connected, its pin 38,39,40,1,2,3,4 respectively with the pin 7 of Peripheral Interface U9,6,5,4,3,2,1 parallel mutually the connection, its pin 37,14,15,16,17,13,12 respectively with the pin 1 of Peripheral Interface U10,2,3,4,5,6,7 parallel mutually connections, its pin 7 one tunnel ground connection, another road and capacitor C 14, the end of C13 is connected, and its pin 26 is via capacitor C 14, the other end of C13 is connected with positive 5V power supply;
The pin 16,15,14,13,12,11,10 of Peripheral Interface U9 is connected with an end of the pin 1,2,3,4,5,6,7 of relay R L respectively, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 16,15,14,13,12,11,10 of Peripheral Interface U10 is connected with an end of the pin 8,9,10,11,12,13,14 of relay R L respectively, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 7,6,5 of Peripheral Interface U11 is connected with the pin 2,3,4 of peripheral parallel interface U13 is parallel mutually respectively, its pin 16,15,14,13,12,11,10 is connected with an end of the pin 15,16,17,18,19,20,21 of relay R L respectively, its pin 8 ground connection, pin 9 connects positive 12V power supply;
The pin 1,2 of Peripheral Interface U12 is connected with the pin 1,40 of peripheral parallel interface U13 is parallel mutually respectively, and its pin 16 is connected with an end of the pin 22 of relay R L, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 20,24,23 of peripheral parallel interface U13 is connected with NO signal end, signal end E and the BC signal end of DK circuit respectively, its pin 7 one tunnel ground connection, another road is connected with the end of capacitor C 20, C19, and its pin 26 is connected with positive 5V power supply via the other end of capacitor C 20, C19.
See also shown in the accompanying drawing 3, the power supply (30) of described protector overcurrent intelligence test device comprises: ac high-voltage and dc low-voltage two are partly, form by base plate (301), friendship/straight modular converter (302), energy supply control module (304) and relay circuit modules such as (50), wherein:
Energy supply control module (304) comprising: bidirectional triode thyristor SCR module and photocoupler OSC module, the output of bidirectional triode thyristor SCR module and its capacitor C 11, C12 and resistance R 22 are connected in series a back and photocoupler OSC module end connected with each other successively and are connected, be connected with the output of bidirectional triode thyristor SCR module after its other end and resistance R 20 serial connections, photocoupler OSC module is connected with the J2 port of cpu circuit again.
See also shown in the accompanying drawing 4, the relay circuit (50) of described protector overcurrent intelligence test device is made up of 16 parts such as miniature relay, wherein:
Miniature relay RL1-10 is one pair of changeover contact, relay R L11 is Second Mate's changeover contact, relay R L13-16 is Second Mate's changeover contact, the corresponding contact of relay R L1-9 is connected with each other with the end points of binary system adjustable resistance matrix respectively, the one end points is connected with an input of two positive temperature coefficient (70) modules in the tested protector, its another end points is connected with an end points of bidirectional triode thyristor SCR module, and the corresponding contact of relay R L13-16 is connected with fan-shaped circuit one input of AC/DC transducer AD line.
See also shown in the accompanying drawing 5, the demonstration of described protector overcurrent intelligence test device and telegraph key (20) module by control panel and printed board after module such as plate form, wherein:
87 sections charactrons are installed on the plate after the printed board, 8 control line D1-8 are interconnected by the corresponding endpoint of 2 7407 in-phase amplifiers in the corresponding endpoint of multi-thread serial port U5 among the CPU and the circuit, 8 section points of control charactron, the corresponding endpoint of 8 control line D1-8 and every charactron is and connects that the pin 34,33,32 of the multi-thread serial port U5 among the CPU is connected with the pin 3,2,1 of decoder U23;
12 band lamp telegraph keys are installed, 10 R wherein, OT on the control panel, ED, BC, NO, SL, YS, CL, sky, ST telegraph key contact becomes 5 * 2 matrixes, and 3 lines of front connect the output from decoder U23, three-way have pulse in scan round, runs into the telegraph key contact by closing, and line of return F1, F2 are connected to the corresponding endpoint of multi-thread serial port U5 in the controller, 2 is PW power key and RST reset key in addition, and it directly is connected to the corresponding endpoint of CPU via line R1, R2, and the power key lamp directly is communicated with the 5V power supply.
See also shown in the accompanying drawing 6, the adjustable resistance matrix (40) of described protector overcurrent intelligence test device is one group of series electrical cohort, resistance on the resistance board is unified to be a kind of power, the end points of adjustable resistance matrix is connected with each other with the corresponding contact of relay R L1-9 respectively, the one end points is connected with an input of two positive temperature coefficient (70) modules in the tested protector, and its another end points is connected with an end points of bidirectional triode thyristor SCR module.
When the utility model used, to the result of PTC motion time measurement, automatic and national standard compared, and as qualified bright OK green light, defective bright NOK red light needn't go to consult the every index in the standard again.For driving PTC various parameters will be set, it is that non-question and answer mode is selected that numerous parameters is adopted soft telegraph key, and parameter can be remembered automatically once being provided with, the PTC such as the test parameter of test are identical later on, just be not provided with separately,, can save a lot of times test in enormous quantities as long as a key is just logical.
The hardware device of this instrument has self-test function, and to such as integrated, charactron etc. are test one by one all.
As shown in Figure 1, be overall system diagram of the present utility model, it has gathered Fig. 2-6 together, connecting line between figure is all expressed one by one, and outstanding principle and logical relation, main points are as follows;
A, controller (10) be printed board (PCB1) in Fig. 1 upper left corner, microprocessor CPU is wherein arranged, the Peripheral Interface Darlington transistor is in order to inhale relay, analog to digital converter 0804 is as measuring.
B, adjustable resistor matrix (40) (as Fig. 6) is to be made of binary system resistance, totally 9 kinds of resistances are 2,4,8,16,32,64,128,256,512.The resistance side also meets RL1-9, the suction of RL1-9 various combination is moving, can constitute with 2 Ω is the 2-1022 Ω of radix, and relay energized is driven by Darlington transistor MC1413 in the controller, among the figure in the adjustable resistance matrix resistance and relay tip their divide and are in two different installations places physically.
C, show and the identification of telegraph key (20) circuit, (as Fig. 5) is by 8279 controls in the controller, in Fig. 5 demonstration and telegraph key, comprise 8 charactrons of equipment among the panel figure, 12 lamp telegraph keys, 3 LED light-emitting diodes and 8 clamp frames, 8 parameters that respectively show 2 PTC on the AB line of charactron are controlled charactron through the D1-8 line through amplification by 8279; 10 composition 2 * 5 matrixes that telegraph key 12 is merely hit, by E1-3 and F1,2 line traffic controls.
As shown in Figure 2, for controller of the present utility model (10) (CPU), be printed board PCB1 independently, constitute by integrated circuit, its major function has:
A, CPU microprocessor U1 are that CPU is made of 89C55, and it is responsible for data operation, logic control, and issue drives and display command, accepts external informations such as keyboard and measurement.
B, integrated U5 is 8279 its gated sweep key shelf, looks into to have examined that telegraph key and press.U7, U13 are peripheral interface 8255, and each can connect the most nearly 24 object-lines, has used totally 32 lines in this circuit, and it controls light-emitting diode and relay on the bright panel.
C, integrated U6 be 0804 it be analog to digital converter, finish and measure PTC resistance and mains ac power supply voltage and the ohmically quick dynamic electric voltage of sampling.It is as same automatic universal meter, and And can do quick kinetic measurement.
D, PTC measures operate time, and this is finished together by CPU and 0804.
E, other integrated U2 is 139 of decoding usefulness, and U3 is 373 to be lock as addressing, and U4 is program curing EEPROM, and usefulness when transfer surveying has not just been used after CPU adopts the built-in EEPROM of 89C55.
U8, U15 are inverter 7414.U9-12 is used for Darlington transistor MC1413 drives relay.The used crystal oscillator of CPU is 6.00 million.
As shown in Figure 3, for power supply of the present utility model (30) (POWER), be divided into ac high-voltage and dc low-voltage two partly, the low pressure electronic circuit of partly powering is used, dc low-voltage adopts AC-DC conversion module new unit, wherein+5V output power supply electronic circuit is used, and+12V inhales motor type relay.
High-voltage alternating 220V is through bidirectional triode thyristor SCR model BT139, and this SCR is controlled by photocoupler OSC3021.OSC3021 is started by CPU or cuts off by the J2 line.
Alternating current don't fail to be after the actuating of relay, just by contact, cuts off electric current release relay just then during cut-out earlier, so as the protection contact, life-saving.
As shown in Figure 4, be relay circuit of the present utility model (50): little owing to the contact contact resistance at some circuit relay electrical equipment, for electronic circuit can not replace, for example the resistance of adjustable resistance matrix is switched, the fan-shaped circuit of AD converter, the continuous switch test of two PTC etc. all adopts relay tip comparatively desirable, and the electronic circuit pressure drop can not replace more greatly than mistake.This circuit adopts 16 miniature relays altogether, RL1-10 miniature relay one pair of changeover contact only wherein, RL11 Second Mate changeover contact, wherein RL1-9 is as adjustable matrix, RL13-16 contact electric current is little so adopt the littler relay of volume, total Second Mate's changeover contact is used in the fan-shaped circuit of AD line, lower powered places such as the measurement connection of DC D.C. resistance.
As shown in Figure 5, be demonstration of the present utility model and telegraph key (20) (DK circuit), this circuit is to be the equipment on the control panel, have on it 87 sections constitute charactrons add 8 line D1-8 of decimal point control by among the CPU 8279 in this circuit 2 7407 homophases amplify 8 section points of control charactrons, this 8 line to every charactron is and connects, as for selecting that pipe is to make 3 lines be translated into 8 lines by E1-3 among the CPU by 138 of integrated U23 of this circuit, need in 8 charactrons to select those several.Have 12 band lamp telegraph keys on the panel, 10 R wherein, OT, ED, BC, NO, SL, YS, CL, sky, ST telegraph key contact becomes 5 * 2 matrixes, and 3 lines of this front connect the output from 138, this is three-way to have pulse in scan round, runs into the telegraph key contact by closing, then at F1,2 lines of return receive in the controller 8279,8279 just can discern in 10 telegraph keys that 1 according to this coordinate.2 telegraph keys 1 are power key in addition, and another is recurrence key RST, direct line R1, and 2 to CPU.The total light-emitting diode of this circuit by in the controller 8255 directly control luminous.The power key lamp directly is communicated with through the 5V power supply.
As shown in Figure 6, for adjustable resistance matrix of the present utility model (40) (RMB), this figure is one group of series electrical cohort, the power that each binary system resistance is born is different, resistance on this resistance board is unified to be 30 watts of a kind of power, everyly surpass 30 watts and just connect than low resistance with several, the adjusting of its resistance is controlled by CPU fully by relay, as described above.
Specific embodiment of the utility model:
Instrument is measured current line voltage V at first automatically
LAnd the resistance R of tested PTC
PTC, according to the operating current I that sets
c, follow Ohm's law Rx=V
L/ I
c-R
PTC-R
S(sampling resistance) calculates the resistance R that should be connected in series
x
Above-mentioned surveying work is finished by analog to digital converter 0804 in the controller (as Fig. 2), the fan-shaped circuit that it constitutes by the contact in AD line to the second printed board PCB2 power panel, one is divided into three, form the multimetering circuit, one is surveyed the PTC resistance R, its two test crosses stream supply voltage V1, its three surveys sampling resistance R
SLast pressure drop V2.Consult Fig. 1.
Evaluation work is all born by CPU.Rx is made of adjustable resistance square Array, consults adjustable resistance square Array among Fig. 1, and it is that Dian Zu And by the binary system resistance connects control relay contact and constitutes.This relay tip is at closed and belt current not separately the time, and to increase life-span and reliability, this is finished by Current Control electronic component photocoupler OSC and bidirectional triode thyristor SCR, consults Fig. 1.
The measurement of PTC operate time is to measure pressure drop on the sampling resistance by analog to digital converter in the controller 0804 by V2 Week in the fan-shaped circuit with renewing, and the Ce Liang Week phase is 10 milliseconds.Measure gained voltage notice CPU, CPU compares specified action lower current limit value in this magnitude of voltage and the standard, as is equal to or less than this lower limit, and bidirectional triode thyristor SCR is cut off the electricity supply, and calculates and measure number of times, and it is PTC operate time that this number of times is taken advantage of 0.01 second.
Claims (6)
1, a kind of protector overcurrent intelligence test device, the microprocessor controller that this device is made of integrated circuit, integrated display of forming and key shelf, A/D modular converter, interface circuit, relay and power supply, it is characterized in that: in device, be provided with the printed board that integrated circuit constitutes, comprise:
Two positive temperature coefficient (70) modules in controller (10), demonstration and telegraph key (20) module, power supply (30), adjustable resistance matrix (40), relay circuit (50), civil power (60) and the tested protector; Wherein:
Microprocessor CPU (1) control port in the controller (10), scanning show that (2) port, Peripheral Interface (3) port, driver module (4) port and analog-to-digital conversion module (5) port are connected with the corresponding port of demonstration with telegraph key (20) module, power supply (30), adjustable resistance matrix (40), relay circuit (50) respectively;
Its control signal is connected with the port of demonstration with telegraph key (20) module via reset line R1, R2, and its control signal is connected with photocoupler OSC port via relay J 2 ports;
Its gated sweep key shelf signal is connected with the contact matrix ports with decoder respectively via data wire;
Its drive signal is connected with 16 miniature relay contacts respectively via relay circuit (50);
Its analog-to-digital conversion signal is connected with power supply (30), adjustable resistance matrix (40) port respectively via fan-shaped circuit, and adjustable resistance matrix (40) output signal is connected with two positive temperature coefficient (70) modules in the tested protector by test port respectively;
Civil power (60) port is connected with the AC/DC converter port of power supply (30) respectively;
Outside device, be provided with the panel figure of telegraph key band lamp.
2, protector overcurrent intelligence test device according to claim 1, it is characterized in that: described controller (10) circuit is made up of integrated microprocessor CPU (1) U 1, decoder U2, lock U3, program curing module U4, multi-thread serial U5, A/D converter U6, peripheral parallel interface U7, U13, inverter U8, U15, Peripheral Interface U9, U10, U11 and U12, wherein:
The pin 21,22,23,24,25,26 of microprocessor CPU (1) U1 is connected with 1 with the pin 25,24,21,23,2,26 of program curing module U4 respectively with 27, the pin 22 of microprocessor CPU (1) U1 is connected with 2 with the pin 3 of decoder U2 respectively again with 21, and the pin 26 of U1 is connected with the pin 1 of decoder U2 via the U8 inverter;
The data bus pins 32 of microprocessor CPU (1) U1,33,34,35,36,37,38,39 respectively with the pin 18 of lock U3,17,14,13,8,7,4,3 and the pin 19 of program curing module U4,18,17,16,15,13,12,11 and the pin 19 of multi-thread serial port U5,18,17,16,15,14,13,12 and the pin 11 of A/D converter U6,12,13,14,15,16,17,18 and the pin 27 of peripheral parallel interface U7,28,29,30,31,32,33,34 and the pin 27 of peripheral parallel interface U13,28,29,30,31,32,33,34 parallel mutually connections;
The pin 29 of microprocessor CPU (1) U 1 is connected with the pin 22 of program curing module U4;
The pin 13 of microprocessor CPU (1) U1 is connected with the pin 4 of multi-thread serial port U5 via inverter U8;
The pin 30 of microprocessor CPU (1) U1 is connected with the pin 3 of the pin 11 of lock U3 and multi-thread serial port U5;
The pin 4 of microprocessor CPU (1) U1 is connected with the DK circuit J1 port of demonstration and telegraph key (20) module via inverter U15;
The pin 16 of microprocessor CPU (1) U1 is connected with the pin 3 of A/D converter U6, and the one road is connected with the pin 11 of multi-thread serial port U5, and another road is connected with the pin 36 of peripheral parallel interface U7, U13 respectively;
The pin 3 of microprocessor CPU (1) U1 is connected with the DK circuit J2 port of demonstration and telegraph key (20) module via inverter U8;
A road of the pin 17 of microprocessor CPU (1) U1 is connected with multi-thread serial port U5 pin 10, and another road is connected with the pin 2 and pin 5 of peripheral parallel interface U13 and the pin 5 of peripheral parallel interface U7 of A/D converter U6 respectively;
The pin 12 of microprocessor CPU (1) U1 is connected with the pin 5 of A/D converter U6;
A road of the pin 9 of microprocessor CPU (1) U1 is connected with the pin 9 of multi-thread serial port U5 respectively with after the pin 35 of the pin 35 of peripheral parallel interface U13 and peripheral parallel interface U7 links to each other again, another road via inverter U8 after respectively via capacitor C 5 and positive 5V power supply be connected with earth connection via resistance R 2;
The pin 5 of microprocessor CPU (1) U1 is connected with the pin 3 of resistor chain RP, and the pin 1 of resistor chain RP is connected with positive 5V power supply;
The pin 7,8 of microprocessor CPU (1) U1 is connected with an end of K switch 2.2 and K switch 2.1 respectively, and the other end of K switch 2.2 and K switch 2.1 is ground connection respectively;
The pin 19 of microprocessor CPU (1) U1 is connected with an end of capacitor C 4 and crystal oscillator respectively, its pin 20 a road with capacitor C 1, C2 and the end after connecing be connected, intermediate point after the serial connection of another road and capacitor C 3, C4 is connected, and its pin 18 is connected with the other end of capacitor C 3 and crystal oscillator respectively;
The pin 31 of microprocessor CPU (1) U1 is connected with the line of K switch 1.1 with K switch 1.2, the other end ground connection of K switch 1.1, another termination power of K switch 1.2;
The pin 40 of microprocessor CPU (1) U1 is connected with positive 5V power supply via the other end of capacitor C 1, C2 respectively;
The pin 7 of decoder U2 is connected with the pin 1 of A/D converter U6, its pin 6 is connected with the pin 6 of peripheral parallel interface U7, and its pin 5 is connected with the pin 6 of peripheral parallel interface U13, and its pin 4 is connected with multi-thread serial port U5 pin 22, its pin 8 ground connection, its pin 16 connects power supply;
The pin 19,16,15,12,9,6,5,2 of lock U3 is connected with the pin 3,4,5,6,7,8,9,10 of program curing module U4 is parallel mutually respectively, and its pin 10 is with pin 1 and connect back ground connection, and its pin 20 connects power supply;
The pin 14 of program curing module U4 is with pin 20 and connect back one tunnel ground connection, another road is connected with the end of capacitor C 7, C6 respectively, its pin 28 is connected with positive 5V power supply via the other end of capacitor C 7, C6, the pin 10 of U4 is connected with the pin 21 of multi-thread serial port U5 and the pin 9 of peripheral parallel interface U7, U13 respectively, and the pin 9 of U4 is connected with the pin 8 of peripheral parallel interface U7, U13 respectively;
The pin 20 of multi-thread serial port U5 via the end of capacitor C 8, C9 after ground connection, pin 40 is connected with positive 5V power supply via the other end of capacitor C 8, C9;
The pin 19 of A/D converter U6 is connected ground via after resistance R 3 and the capacitor C 12, its pin 4 is connected with the serial connection point of resistance R 3 and capacitor C 12, its pin 6 is connected with A/D contact on the power panel with resistance R 5 backs via resistance R 4, diode D1 is connected with resistance R 5 serial connections point with resistance R 4 with the serial connection point of diode D2, its pin 7,8 also connects back one tunnel ground connection, another road is connected with the end of capacitor C 17, C18, and its pin 20 is connected with the 5V power supply via the other end of capacitor C 17, C18;
The pin 11 of peripheral parallel interface U7,10,18,19 respectively with the pin 1 of Peripheral Interface U11,2,3,4 parallel mutually connections, its pin 20,21,22 respectively with the pin ST of DK circuit, OT, R is connected, its pin 38,39,40,1,2,3,4 respectively with the pin 7 of Peripheral Interface U9,6,5,4,3,2,1 parallel mutually the connection, its pin 37,14,15,16,17,13,12 respectively with the pin 1 of Peripheral Interface U10,2,3,4,5,6,7 parallel mutually connections, its pin 7 one tunnel ground connection, another road and capacitor C 14, the end of C13 is connected, and its pin 26 is via capacitor C 14, the other end of C13 is connected with positive 5V power supply;
The pin 16,15,14,13,12,11,10 of Peripheral Interface U9 is connected with an end of the pin 1,2,3,4,5,6,7 of relay R L respectively, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 16,15,14,13,12,11,10 of Peripheral Interface U10 is connected with an end of the pin 8,9,10,11,12,13,14 of relay R L respectively, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 7,6,5 of Peripheral Interface U11 is connected with the pin 2,3,4 of peripheral parallel interface U13 is parallel mutually respectively, its pin 16,15,14,13,12,11,10 is connected with an end of the pin 15,16,17,18,19,20,21 of relay R L respectively, its pin 8 ground connection, pin 9 connects positive 12V power supply;
The pin 1,2 of Peripheral Interface U12 is connected with the pin 1,40 of peripheral parallel interface U13 is parallel mutually respectively, and its pin 16 is connected with an end of the pin 22 of relay R L, its pin 8 ground connection, and pin 9 connects positive 12V power supply;
The pin 20,24,23 of peripheral parallel interface U13 is connected with NO signal end, signal end E and the BC signal end of DK circuit respectively, its pin 7 one tunnel ground connection, another road is connected with the end of capacitor C 20, C19, and its pin 26 is connected with positive 5V power supply via the other end of capacitor C 20, C19.
3, protector overcurrent intelligence test device according to claim 1, it is characterized in that: described power supply (30) comprising: ac high-voltage and dc low-voltage two are partly, form by base plate (301), friendship/straight modular converter (302), energy supply control module (304) and relay circuit (50), wherein:
Energy supply control module (304) comprising: bidirectional triode thyristor SCR module and photocoupler OSC module, the output of bidirectional triode thyristor SCR module and its capacitor C 11, C12 and resistance R 22 are connected in series a back and photocoupler OSC module end connected with each other successively and are connected, be connected with the output of bidirectional triode thyristor SCR module after its other end and resistance R 20 serial connections, photocoupler OSC module is connected with the J2 port of cpu circuit again.
4, protector overcurrent intelligence test device according to claim 1, it is characterized in that: described relay circuit (50) is made up of 16 miniature relays, wherein:
Miniature relay RL1-10 is one pair of changeover contact, relay R L11 is Second Mate's changeover contact, relay R L13-16 is Second Mate's changeover contact, the corresponding contact of relay R L1-9 is connected with each other with the end points of binary system adjustable resistance matrix respectively, the one end points is connected with an input of two positive temperature coefficient (70) modules in the tested protector, its another end points is connected with an end points of bidirectional triode thyristor SCR module, and the corresponding contact of relay R L13-16 is connected with fan-shaped circuit one input of AC/DC transducer AD line.
5, protector overcurrent intelligence test device according to claim 1 is characterized in that: described demonstration and telegraph key (20) module by control panel and printed board after plate form, wherein:
87 sections charactrons are installed on the plate after the printed board, 8 control line D1-8 are interconnected by the corresponding endpoint of 2 7407 in-phase amplifiers in the corresponding endpoint of multi-thread serial port U5 among the CPU and the circuit, 8 section points of control charactron, the corresponding endpoint of 8 control line D1-8 and every charactron is and connects that the pin 34,33,32 of the multi-thread serial port U5 among the CPU is connected with the pin 3,2,1 of decoder U23;
12 band lamp telegraph keys are installed, 10 R wherein, OT on the control panel, ED, BC, NO, SL, YS, CL, sky, ST telegraph key contact becomes 5 * 2 matrixes, and 3 lines of front connect the output from decoder U23, three-way have pulse in scan round, runs into the telegraph key contact by closing, and line of return F1, F2 are connected to the corresponding endpoint of multi-thread serial port U5 in the controller, 2 is PW power key and RST reset key in addition, and it directly is connected to the corresponding endpoint of CPU via line R1, R2, and the power key lamp directly is communicated with the 5V power supply.
6, protector overcurrent intelligence test device according to claim 1, it is characterized in that: described adjustable resistance matrix (40) is one group of series electrical cohort, resistance on the resistance board is unified to be a kind of power, the end points of adjustable resistance matrix is connected with each other with the corresponding contact of relay R L1-9 respectively, the one end points is connected with an input of two positive temperature coefficient (70) modules in the tested protector, and its another end points is connected with an end points of bidirectional triode thyristor SCR module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043783 CN2810071Y (en) | 2005-07-26 | 2005-07-26 | Intelligent tester for overcurrent of protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043783 CN2810071Y (en) | 2005-07-26 | 2005-07-26 | Intelligent tester for overcurrent of protector |
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| Publication Number | Publication Date |
|---|---|
| CN2810071Y true CN2810071Y (en) | 2006-08-23 |
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ID=36926253
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520043783 Expired - Fee Related CN2810071Y (en) | 2005-07-26 | 2005-07-26 | Intelligent tester for overcurrent of protector |
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| CN (1) | CN2810071Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452017B (en) * | 2007-11-30 | 2011-10-26 | 英业达股份有限公司 | Full automatic over current protection test system and method |
| CN105523440A (en) * | 2014-10-17 | 2016-04-27 | 索若德国两合股份有限公司 | Weaving machine comprising circuit board and circuit board |
| CN111830387A (en) * | 2020-07-23 | 2020-10-27 | 中国振华集团永光电子有限公司（国营第八七三厂） | Transient diode current surge test control system |
-
2005
- 2005-07-26 CN CN 200520043783 patent/CN2810071Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452017B (en) * | 2007-11-30 | 2011-10-26 | 英业达股份有限公司 | Full automatic over current protection test system and method |
| CN105523440A (en) * | 2014-10-17 | 2016-04-27 | 索若德国两合股份有限公司 | Weaving machine comprising circuit board and circuit board |
| CN111830387A (en) * | 2020-07-23 | 2020-10-27 | 中国振华集团永光电子有限公司（国营第八七三厂） | Transient diode current surge test control system |
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Granted publication date: 20060823 Termination date: 20110726 |