CN2594799Y - Equipotential coupling resistor measuring device with storage function - Google Patents
Equipotential coupling resistor measuring device with storage function Download PDFInfo
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- CN2594799Y CN2594799Y CN 02251065 CN02251065U CN2594799Y CN 2594799 Y CN2594799 Y CN 2594799Y CN 02251065 CN02251065 CN 02251065 CN 02251065 U CN02251065 U CN 02251065U CN 2594799 Y CN2594799 Y CN 2594799Y
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Abstract
The utility model relates to an equipotential coupling resistor measuring device with a storage function, which belongs to a measuring device use for building trades or the field of electric safety. The utility model has a main function of measuring that weather the coupling of reliable circuits exists between a metal part which is possible to conduct electric potential and equipotential points. The utility model comprises an electric power section, a main control unit section, a sampling section, a conversion section, a storer section and an alarm circuit section. The utility model has the advantages that the utility model has a function of data storage, and therefore, the utility model can store data which is needed to be stored according to requirements of checking people; the utility model has a data interface, and therefore, the utility model can find out the data stored in the storer through the connection of the data interface and a PC; the utility model also has a function of self-protection overvoltage protection, and therefore, the utility model has self protection when checking people faultily operate during checking or when checked objects have dangerous voltages. The utility model has the advantages of smaller volume and lighter weight.
Description
Technical field the utility model belongs to the surveying instrument that uses in building trade or the electrical safety field.
Its major function of background technology equipotential bonding resistance measuring instrument is to measure the connection that whether has between the metal device that may conduct current potential in the buildings and the isopotential point on the reliable circuit.The instrument close with resistance measuring instrument that uses has following shortcoming at present: want gear shift during Super-Current Measurement; Spot measurement does not only have the continuous coverage function, inconvenient on-the-spot use; Do not set the warning resistance value; Do not have printing function; And in the patented claim 02274289.1 with little equipotential bonding resistance measuring instrument of beating in use, finding has the shortcoming that print speed is slow, the printer power consumption is big.
Summary of the invention the utility model provides a kind of equipotential bonding resistance measuring instrument with memory function, to solve the problem that print speed that existing measuring instrument exists possesses memory function slowly and not.The technical scheme that the utility model is taked is: comprise following each several part:
(a) power unit
The function that power unit is being undertaken to the total system power supply.Power supply is come in from the socket DY of 2 pin, is added to the two ends of 5V stabilivolt ZI, and the whole operating voltage of system is 5V, and when detecting equipotential resistance, it is responsible for again supplying with and detects required electric current;
The 1 pin ground connection of socket DY, 2 pins link to each other with 2 pins of stabilivolt ZI, 2 pins of resistance R 1,1 pin of resistance R 19,2 pins of resistance R 16,2 pins of T6,3 pins of T4,8 pins of integrated operational amplifier I3A;
1 pin of the stabilivolt ZI of 5V meets VCC, 2 pin ground connection;
1 pin of capacitor C 12 meets VCC, 2 pin ground connection;
Each pin that 1 pin of resistance R 19 links to each other with 2 pins with socket DY links to each other, and each pin that 2 pins link to each other with 1 pin with ZI is continuous;
The base stage 1 of triode T7 links to each other with 2 pins of resistance R 18, and collector 2 links to each other with 2 pins of light emitting diode BG, emitter 3 ground connection;
1 pin of resistance R 18 links to each other with 13 pins of single-chip microcomputer I5, and 2 pins link to each other with the base stage 1 of triode T7;
Each pin that 1 pin of light emitting diode BG links to each other with 1 pin with resistance R 19 links to each other, and 2 pins link to each other with the collector 2 of triode T7;
(b) main control unit part
Main control unit is being undertaken the reception and the processing of signal, clock, demonstration, storage data and with the work of dataphone, it also is responsible for the normal operation and the keypad function of total system, it mainly is made up of single-chip microcomputer and some peripheral circuits.
1 pin of row's resistance R * 8 links to each other with power supply VCC, 2 pins link to each other with 19 pin of analog to digital converter I1,1 pin of single-chip microcomputer I5,3 pins link to each other with 18 pin of I, 2 pin of I5,4 pins link to each other with 17 pin of I1,3 pin of I5,5 pins link to each other with 16 pin of I1,4 pin of I5, and 6 pins link to each other with 15 pin of I1,5 pin of I5, and 7 pins link to each other with 6 pin of I5,6 pin of LCD CD, 8 pins link to each other with 7 pin of I5,5 pin of LCD, and 9 pins link to each other with 8 pin of I5,4 pin of LCD;
1 pin of single-chip microcomputer I5 and 2 pins of resistance R * 8,19 pin of I1 link to each other, 3 pins of 2 pins and resistance R * 8,18 pin of I1 link to each other, 4 pins of 3 pins and resistance R * 8,17 pin of I1 link to each other, 5 pins of 4 pins and resistance R * 8,16 pin of I1 link to each other, 6 pins of 5 pins and resistance R * 8,15 pin of I1 link to each other, 7 pins of 6 pins and resistance R * 8,6 pin of LCD link to each other, 8 pins of 7 pins and resistance R * 8,5 pin of LCD (liquid crystal display) link to each other, 9 pins of 8 pins and resistance R * 8,4 pin of LCD link to each other, 2 pins of 9 pins and capacitor C 1,1 pin of resistance R 6,2 pin of resistance R 10,2 pin of resistance R 8,7 pins of KEY link to each other, 10 pins link to each other with 12 pin of serial port communication chip I7,11 pins link to each other with 11 pin of I7,1 pin of 12 pins and 32K memory I 4,1 pin of 32K memory I 6 links to each other, 13 pins link to each other with 1 pin of resistance R 18,5 pins of 14 pins and I4,5 pins of I6 link to each other, 6 pins of 15 pins and I4, connect under 5 pins of I6,16 pins link to each other with 1 pin of resistance R 11,17 pins link to each other with 1 pin of resistance R 7,2 pin of 18 pins and J, 1 pin of capacitor C 3 links to each other, 1 pin of 19 pins and J, 1 pin of capacitor C 2 links to each other, 20 pins and GND () link to each other, 21 pins link to each other with 6 pins of clock chip I2,22 pins link to each other with 5 pins of I2,23 pins link to each other with 7 pins of I2,24 pins link to each other with 1 pin of KEY, 25 pins link to each other with 2 pins of KEY, 26 pins link to each other with 3 pins of KEY, 27 pins link to each other with 4 pins of KEY, 28 pins link to each other with 5 pins of KEY, 29 pins are unsettled, 30 pins are unsettled, 31 pins link to each other with VCC, 32 pins link to each other with 14 pin of LCD, 33 pins link to each other with 13 pin of LCD, 34 pins link to each other with 12 pin of LCD, 35 pins link to each other with 11 pin of LCD, 36 pins link to each other with 10 pin of LCD, 37 pins link to each other with 9 pin of LCD, 38 pins link to each other with 8 pin of LCD, 39 pins link to each other with 7 pin of LCD, 40 pins link to each other with VCC
1 pin of clock chip I2 connects each pin that VCC links to each other with 1 pin of resistance R S-232,2 pins link to each other with 2 pin of crystal oscillator JZ2,3 pins link to each other with 1 pin of JZ2,4 pin ground connection, 5 pins link to each other with 22 pin of single-chip microcomputer I5,6 pins link to each other with 21 pin of single-chip microcomputer I5, and 7 pins link to each other with 23 pin of single-chip microcomputer I5, and 8 pins link to each other with 1 pin of dc-battery E is anodal;
1 pin of dc-battery E links to each other with 8 pins of clock chip I2,2 pin ground connection,
1 pin of resistance R 10 links to each other with 5 pins of 28 pins of single-chip microcomputer I5, KEY, and 2 pins link to each other with 2 pins of resistance R 8,7 pins of KEY, 1 pin of resistance R 6,2 pin of capacitor C 1,9 pin of I5;
1 pin of resistance R 8 links to each other with 4 pins of 27 pins of single-chip microcomputer I5, KEY, and each pin that 2 pins link to each other with 2 pins with resistance R 10 links to each other;
1 pin of serial port communication chip I7 links to each other with 2 pins of capacitor C 5,2 pins link to each other with 2 pins of capacitor C 8,3 pins link to each other with 1 pin of capacitor C 5,4 pins link to each other with 2 pins of capacitor C 6,5 pins link to each other with 1 pin of capacitor C 6,6 pins link to each other with 2 pins of capacitor C 7, and 7 pins are unsettled, and 8 pins are unsettled, 9 pins are unsettled, 10 pins are unsettled, and 11 pins link to each other with 11 pins of single-chip microcomputer I5, and 12 pins link to each other with 10 pins of I5,13 pins link to each other with 3 pins of resistance R S-232,14 pins link to each other with 2 pins of resistance R S-232,15 pin ground connection, and 16 pins meet VCC;
1 pin of capacitor C 6 links to each other with 5 pins of serial port communication chip I7, and 2 pins link to each other with 4 pins of I7;
1 pin of capacitor C 5 links to each other with 3 pins of I7, and 2 pins link to each other with 1 pin of I7;
1 pin ground connection of electric capacity 105,2 pins meet VCC;
1 pin of capacitor C 8 meets VCC, and 2 pins link to each other with 2 pins of I7,
1 pin ground connection of capacitor C 7,2 pins link to each other with 6 pins of I7;
1 pin of capacitor C 1 meets VCC, and 2 pins link to each other with 1 pin single-chip microcomputer I5 of resistance R 6,9 pin of I5;
1 pin of resistance R 6 links to each other with 9 pin of 2 pin of capacitor C 1, I5,2 pin ground connection;
1 pin of capacitor C 2 links to each other with 19 pins of 1 pin of J, I5,2 pin ground connection;
1 pin of crystal oscillator J links to each other with 1 pin of 19 pin of I5, capacitor C 2, and 2 pins link to each other with 18 pin of I5,1 pin of capacitor C 3;
1 pin of capacitor C 3 links to each other with 2 pin of 18 pin of I5, J, 2 pin ground connection;
1 pin ground connection of resistance R 13,2 pins link to each other with 4 pins of T6;
1 pin ground connection of capacitor C 11,2 pins link to each other with the base stage pin 2 of triode T5,2 pin of resistance R 11;
16 pin of 1 pin I5 of resistance R 11 link to each other, and 2 pins link to each other with 2 pins of capacitor C 11,1 pin of triode T5;
(c) sampling and conversion portion
What this part was mainly finished is the measurement and the translation function of resistance value; Detect electric current and on testing resistance, produce pressure drop, after resistance R 4, resistance R 3 dividing potential drops, after amplifying through integrated operational amplifier I3A again, deliver among the analog to digital converter I1, through conversion, convert analog quantity to digital quantity, prepare to deliver in the main control chip, this a part of element annexation is as follows:
1 pin of R3 and two resistance of R4 is received the two ends of measuring resistance respectively, and the detection electric current enters testing resistance by two pin of T6, by resistance R 4, after resistance R 3 dividing potential drops, enters TLV2543 through amplification;
1 pin of resistance R x links to each other with 1 pin of resistance R 17,1 pin of resistance R 4 respectively, and 2 pin link to each other with 2 pin of resistance R 5,1 pin of T4 respectively;
Each pin that 1 pin of resistance R 17 links to each other with 1 pin with testing resistance Rx links to each other, and 2 pin link to each other with ground;
Each pin that 1 pin of resistance R 4 links to each other with 1 pin with testing resistance Rx links to each other, and 2 pin link to each other with 1 pin of resistance R 3,3 pins of integrated operational amplifier I3A;
1 pin of resistance R 3 links to each other with 3 pins of 2 pins of resistance R 4, integrated operational amplifier I3A, and 2 pins link to each other with ground;
1 pin of resistance R 9 links to each other with 1 pin of 2 pins of integrated operational amplifier I3A, potentiometer W1, and 2 pins link to each other with ground;
1 pin of integrated operational amplifier I3A links to each other with 2,3 pins of potentiometer W1 and 1 pin of I1, and 2 pins link to each other with 1 pin of resistance R 9,1 pin of potentiometer W1; 3 pins link to each other with 2 pins of resistance R 4,1 pin of resistance R 3, and 4 pins link to each other with ground, and 8 pins link to each other with+12V;
1 pin of potentiometer W1 links to each other with 1 pin of 2 pins of integrated operational amplifier I3A, resistance R 9, and 2 pins link to each other with 1 pin of 3 pins, integrated operational amplifier I3A, 1 pin of I1;
1 pin of resistance R 5 links to each other with 2 pin of 5 pins of integrated operational amplifier I3B, resistance R 2, and 2 pins link to each other with 1 end of testing resistance, 1 pin of T4;
1 pin ground connection of resistance R 2,2 pins link to each other with 5 pins of integrated operational amplifier I3B, 1 pin of resistance R 5;
5 pins of integrated operational amplifier I3B link to each other with 1 pin of 2 pins of resistance R 2, resistance R 5, and 6 pins link to each other with 1 pin of resistance R 19,2 pins of resistance R 12, and 7 pins link to each other with 2,3 pins of W2,2 pins of analog to digital converter I1;
1 pin ground connection of resistance R 12,2 pins link to each other with 6 pins of integrated operational amplifier I3B, 1 pin of W2;
1 pin of resistance R 9 links to each other with 1 pin of 6 pins of integrated operational amplifier I3B, resistance R 12, and 2 pins link to each other with 1 pin of W2;
1 pin of W2 links to each other with 2 pin of 6 pins of integrated operational amplifier I3B, resistance R 12, and 2 pins, 3 pins link to each other with 2 pins of I1,7 pins of integrated operational amplifier I3B,
1 pin of analog to digital converter I1 and 1 pin of integrated operational amplifier I3A, 2 of potentiometer W1,3 pins link to each other, 7 pins of 2 pins and integrated operational amplifier I3B, 2 of W2,3 pins link to each other, 3 pin ground connection, 4 pin ground connection, 5 pin ground connection, 6 pin ground connection, 7 pin ground connection, 8 pin ground connection, 9 pin ground connection, 10 pin ground connection, 11 pin ground connection, 12 pin ground connection, 13 pin ground connection, 14 pins meet VCC, 6 pins of 15 pins and resistance R * 8,5 pins of I5 link to each other, 5 pins of 16 pins and resistance R * 8,4 pins of I5 link to each other, 4 pins of 17 pins and resistance R * 8,3 pins of I5 link to each other, 3 pins of 18 pins and resistance R * 8,2 pins of I5 link to each other, 2 pins of 19 pins and resistance R * 8,1 pin of I5 links to each other, and 20 pins meet VCC;
1 pin of T4 links to each other with 1 pin of 2 pins of resistance R 5, resistance R X, and 2 pins link to each other with 1 pin of resistance R 15,2 pins of 3 pins and photoelectrical coupler T6;
1 pin of resistance R 15 links to each other with 2 pins of T4, and 2 pins link to each other with 1 pin of photoelectrical coupler T6,2 pins of resistance R 14,1 pin of resistance R 16;
1 pin ground connection of resistance R 14 resistance, 2 pins link to each other with 2 pins of resistance R 15,1 pin of T6,1 pin of resistance R 16;
Each pin that 1 pin of photoelectrical coupler T6 links to each other with 2 pins with resistance R 15 links to each other, and 2 pins link to each other with 3 pin of T4,1 pin of resistance R 19,2 pin of DY (2PIN), and 3 pins link to each other with 1 pin of triode T5, and 4 pins link to each other with 2 pin of resistance R 13;
1 pin ground connection of resistance R 13,2 pins link to each other with 4 pins of T6;
1 pin of triode T5 links to each other with 3 pins of photoelectrical coupler T4, and 2 pins link to each other with 2 pin of capacitor C 11,2 pin of resistance R 11, and 3 pins link to each other with the emitter of I7,2 pin of resistance R 19,1 pin of ZI (5V), 1 pin of capacitor C 12;
1 pin of resistance R 11 links to each other with 16 pins of single-chip microcomputer I5, and 2 pins link to each other with 2 pins of triode T5,2 pins of capacitor C 11;
1 pin ground connection of capacitor C 11,2 pins link to each other with 2 pins of resistance R 11,2 pins of triode T5;
(d) memory portion
This part major function is: each parameter during the storage system operation, store detected equipotential resistance.After having detected equipotential resistance, system automatically current detection to resistance value deposit in the storer.
The element annexation of this part is as follows:
1 pin of 32K memory I 4 links to each other with 1 pin of 12 pin of I5,32K memory I 6, and 2 pins meet VCC, 3 pin ground connection, 4 pin ground connection, 5 pins link to each other with 14 pins of I5,5 pins of I6, and 6 pins link to each other with 15 pins of I5,6 pins of I6,7 pin ground connection, 8 pins meet VCC;
1 pin of 32K memory I 6 links to each other with 1 pin of 12 pin of I5, I4,2 pin ground connection, 3 pin ground connection, 4 pin ground connection, 5 pins link to each other with 14 pins of I5,5 pins of I4, and 6 pins link to each other with 15 pins of I5,6 pins of I4 (32K storer), 7 pin ground connection, 8 pins meet VCC
(e) warning circuit part
This part external one little buzzer, it mainly is when the resistance value of measuring during greater than setting value, the usefulness of reporting to the police.The element annexation of this part is as follows:
The 1 pin ground connection of triode T1,2 pins link to each other with 1 pin of T2, and 3 pins link to each other with 2 pins of capacitor C 4,3 pins of T2,1 pin of resistance R 1;
2 pins of triode T2 link to each other with 2 pins of resistance R 7, and 3 pins link to each other with 3 pins of T1,2 pins of capacitor C 4,1 pin of resistance R 1, and 1 pin links to each other with 2 pins of T1;
1 pin of capacitor C 4 connects 2 pin of buzzer YD, and 2 pins link to each other with 3 pins of T1,3 pins of T2,1 pin of resistance R 1;
1 pin of resistance R 1 links to each other with 3 pins of 3 pins of T1, T2,2 pins of capacitor C 4, and 2 pins connect 2 pins of DY;
1 pin of resistance R 7 connects 17 pins of I5, and 2 pins connect 2 pins of T2; 1 pin ground connection of YD buzzer, 2 pin connect 1 pin of capacitor C 4.
Advantage of the present utility model is: have data storage function: can be according to testing staff's the requirement data storage with the needs storage; Has data-interface: be connected with PC by interface, the data of storing in the storer can be accessed; Have over-voltage protecting function: measuring instrument can self-shield when having dangerous voltage when the testing staff is detecting because on maloperation or the detected object; Volume is littler, weight is lighter.
Appended drawings is the utility model circuit theory diagrams.The Rankine-Hugoniot relations explanation of each pin:
For two port elements, traverse: the left side is " 1 " pin, and the right is " 2 " pin.Place vertically: top is " 1 " pin, is " 2 " pin below.
For triode and the not specified three-terminal element of pin: base stage is " 1 " pin, and current collection is " 2 " pin very, and emission is " 3 " pin very.For multiple-port cell, consistent with the mark in the circuit diagram.
Embodiment
(a) power unit
The function that power unit is being undertaken to the total system power supply.Power supply is come in from the socket DY of 2 pin, is added to the two ends of 5V stabilivolt ZI, and the whole operating voltage of system is 5V, and when detecting equipotential resistance, it is responsible for again supplying with and detects required electric current;
The 1 pin ground connection of socket DY, 2 pins link to each other with 2 pins of stabilivolt ZI, 2 pins of resistance R 1,1 pin of resistance R 19,2 pins of resistance R 16,2 pins of T6,3 pins of T4,8 pins of integrated operational amplifier I3A;
1 pin of the stabilivolt ZI of 5V meets VCC, 2 pin ground connection;
1 pin of capacitor C 12 meets VCC, 2 pin ground connection;
Each pin that 1 pin of resistance R 19 links to each other with 2 pins with socket DY links to each other, and each pin that 2 pins link to each other with 1 pin with ZI is continuous;
The base stage 1 of triode T7 links to each other with 2 pins of resistance R 18, and collector 2 links to each other with 2 pins of light emitting diode BG, emitter 3 ground connection;
1 pin of resistance R 18 links to each other with 13 pins of single-chip microcomputer I5, and 2 pins link to each other with the base stage 1 of triode T7;
Each pin that 1 pin of light emitting diode BG links to each other with 1 pin with resistance R 19 links to each other, and 2 pins link to each other with the collector 2 of triode T7;
(b) main control unit part
Main control unit is being undertaken the reception and the processing of signal, clock, demonstration, storage data and with the work of dataphone, it also is responsible for the normal operation and the keypad function of total system, it mainly is made up of single-chip microcomputer and some peripheral circuits.
1 pin of row's resistance R * 8 links to each other with power supply VCC, 2 pins link to each other with 19 pin of analog to digital converter I1,1 pin of single-chip microcomputer I5,3 pins link to each other with 18 pin of I, 2 pin of I5,4 pins link to each other with 17 pin of I1,3 pin of I5,5 pins link to each other with 16 pin of I1,4 pin of I5, and 6 pins link to each other with 15 pin of I1,5 pin of I5, and 7 pins link to each other with 6 pin of I5,6 pin of LCD CD, 8 pins link to each other with 7 pin of I5,5 pin of LCD, and 9 pins link to each other with 8 pin of I5,4 pin of LCD;
1 pin of single-chip microcomputer I5 and 2 pins of resistance R * 8,19 pin of I1 link to each other, 3 pins of 2 pins and resistance R * 8,18 pin of I1 link to each other, 4 pins of 3 pins and resistance R * 8,17 pin of I1 link to each other, 5 pins of 4 pins and resistance R * 8,16 pin of I1 link to each other, 6 pins of 5 pins and resistance R * 8,15 pin of I1 link to each other, 7 pins of 6 pins and resistance R * 8,6 pin of LCD link to each other, 8 pins of 7 pins and resistance R * 8,5 pin of LCD (liquid crystal display) link to each other, 9 pins of 8 pins and resistance R * 8,4 pin of LCD link to each other, 2 pins of 9 pins and capacitor C 1,1 pin of resistance R 6,2 pin of resistance R 10,2 pin of resistance R 8,7 pins of KEY link to each other, 10 pins link to each other with 12 pin of serial port communication chip I7,11 pins link to each other with 11 pin of I7,1 pin of 12 pins and 32K memory I 4,1 pin of 32K memory I 6 links to each other, 13 pins link to each other with 1 pin of resistance R 18,5 pins of 14 pins and I4,5 pins of I6 link to each other, 6 pins of 15 pins and I4, connect under 5 pins of I6,16 pins link to each other with 1 pin of resistance R 11,17 pins link to each other with 1 pin of resistance R 7,2 pin of 18 pins and J, 1 pin of capacitor C 3 links to each other, 1 pin of 19 pins and J, 1 pin of capacitor C 2 links to each other, 20 pins and GND () link to each other, 21 pins link to each other with 6 pins of clock chip I2,22 pins link to each other with 5 pins of I2,23 pins link to each other with 7 pins of I2,24 pins link to each other with 1 pin of KEY, 25 pins link to each other with 2 pins of KEY, 26 pins link to each other with 3 pins of KEY, 27 pins link to each other with 4 pins of KEY, 28 pins link to each other with 5 pins of KEY, 29 pins are unsettled, 30 pins are unsettled, 31 pins link to each other with VCC, 32 pins link to each other with 14 pin of LCD, 33 pins link to each other with 13 pin of LCD, 34 pins link to each other with 12 pin of LCD, 35 pins link to each other with 11 pin of LCD, 36 pins link to each other with 10 pin of LCD, 37 pins link to each other with 9 pin of LCD, 38 pins link to each other with 8 pin of LCD, 39 pins link to each other with 7 pin of LCD, 40 pins link to each other with VCC
1 pin of clock chip I2 connects each pin that VCC links to each other with 1 pin of resistance R S-232,2 pins link to each other with 2 pin of crystal oscillator JZ2,3 pins link to each other with 1 pin of JZ2,4 pin ground connection, 5 pins link to each other with 22 pin of single-chip microcomputer I5,6 pins link to each other with 21 pin of single-chip microcomputer I5, and 7 pins link to each other with 23 pin of single-chip microcomputer I5, and 8 pins link to each other with 1 pin of dc-battery E is anodal;
1 pin of dc-battery E links to each other with 8 pins of clock chip I2,2 pin ground connection,
1 pin of resistance R 10 links to each other with 5 pins of 28 pins of single-chip microcomputer I5, KEY, and 2 pins link to each other with 2 pins of resistance R 8,7 pins of KEY, 1 pin of resistance R 6,2 pin of capacitor C 1,9 pin of I5;
1 pin of resistance R 8 links to each other with 4 pins of 27 pins of single-chip microcomputer I5, KEY, and each pin that 2 pins link to each other with 2 pins with resistance R 10 links to each other;
1 pin of serial port communication chip I7 links to each other with 2 pins of capacitor C 5,2 pins link to each other with 2 pins of capacitor C 8,3 pins link to each other with 1 pin of capacitor C 5,4 pins link to each other with 2 pins of capacitor C 6,5 pins link to each other with 1 pin of capacitor C 6,6 pins link to each other with 2 pins of capacitor C 7, and 7 pins are unsettled, and 8 pins are unsettled, 9 pins are unsettled, 10 pins are unsettled, and 11 pins link to each other with 11 pins of single-chip microcomputer I5, and 12 pins link to each other with 10 pins of I5,13 pins link to each other with 3 pins of resistance R S-232,14 pins link to each other with 2 pins of resistance R S-232,15 pin ground connection, and 16 pins meet VCC;
1 pin of capacitor C 6 links to each other with 5 pins of serial port communication chip I7, and 2 pins link to each other with 4 pins of I7;
1 pin of capacitor C 5 links to each other with 3 pins of I7, and 2 pins link to each other with 1 pin of I7;
1 pin ground connection of electric capacity 105,2 pins meet VCC;
1 pin of capacitor C 8 meets VCC, and 2 pins link to each other with 2 pins of I7,
1 pin ground connection of capacitor C 7,2 pins link to each other with 6 pins of I7;
1 pin of capacitor C 1 meets VCC, and 2 pins link to each other with 1 pin single-chip microcomputer I5 of resistance R 6,9 pin of I5;
1 pin of resistance R 6 links to each other with 9 pin of 2 pin of capacitor C 1, I5,2 pin ground connection;
1 pin of capacitor C 2 links to each other with 19 pins of 1 pin of J, I5,2 pin ground connection;
1 pin of crystal oscillator J links to each other with 1 pin of 19 pin of I5, capacitor C 2, and 2 pins link to each other with 18 pin of I5,1 pin of capacitor C 3;
1 pin of capacitor C 3 links to each other with 2 pin of 18 pin of I5, J, 2 pin ground connection;
1 pin ground connection of resistance R 13,2 pins link to each other with 4 pins of T6;
1 pin ground connection of capacitor C 11,2 pins link to each other with the base stage pin 2 of triode T5,2 pin of resistance R 11;
16 pin of 1 pin I5 of resistance R 11 link to each other, and 2 pins link to each other with 2 pins of capacitor C 11,1 pin of triode T5;
(c) sampling and conversion portion
What this part was mainly finished is the measurement and the translation function of resistance value; Detect electric current and on testing resistance, produce pressure drop, after resistance R 4, resistance R 3 dividing potential drops, after amplifying through integrated operational amplifier I3A again, deliver among the analog to digital converter I1, through conversion, convert analog quantity to digital quantity, prepare to deliver in the main control chip, this a part of element annexation is as follows:
1 pin of R3 and two resistance of R4 is received the two ends of measuring resistance respectively, and the detection electric current enters testing resistance by two pin of T6, by resistance R 4, after resistance R 3 dividing potential drops, enters TLV2543 through amplification;
1 pin of resistance R x links to each other with 1 pin of resistance R 17,1 pin of resistance R 4 respectively, and 2 pin link to each other with 2 pin of resistance R 5,1 pin of T4 respectively;
Each pin that 1 pin of resistance R 17 links to each other with 1 pin with testing resistance Rx links to each other, and 2 pin link to each other with ground;
Each pin that 1 pin of resistance R 4 links to each other with 1 pin with testing resistance Rx links to each other, and 2 pin link to each other with 1 pin of resistance R 3,3 pins of integrated operational amplifier I3A;
1 pin of resistance R 3 links to each other with 3 pins of 2 pins of resistance R 4, integrated operational amplifier I3A, and 2 pins link to each other with ground;
1 pin of resistance R 9 links to each other with 1 pin of 2 pins of integrated operational amplifier I3A, potentiometer W1, and 2 pins link to each other with ground;
1 pin of integrated operational amplifier I3A links to each other with 2,3 pins of potentiometer W1 and 1 pin of I1, and 2 pins link to each other with 1 pin of resistance R 9,1 pin of potentiometer W1; 3 pins link to each other with 2 pins of resistance R 4,1 pin of resistance R 3, and 4 pins link to each other with ground, and 8 pins link to each other with+12V;
1 pin of potentiometer W1 links to each other with 1 pin of 2 pins of integrated operational amplifier I3A, resistance R 9, and 2 pins link to each other with 1 pin of 3 pins, integrated operational amplifier I3A, 1 pin of I1;
1 pin of resistance R 5 links to each other with 2 pin of 5 pins of integrated operational amplifier I3B, resistance R 2, and 2 pins link to each other with 1 end of testing resistance, 1 pin of T4;
1 pin ground connection of resistance R 2,2 pins link to each other with 5 pins of integrated operational amplifier I3B, 1 pin of resistance R 5;
5 pins of integrated operational amplifier I3B link to each other with 1 pin of 2 pins of resistance R 2, resistance R 5, and 6 pins link to each other with 1 pin of resistance R 19,2 pins of resistance R 12, and 7 pins link to each other with 2,3 pins of W2,2 pins of analog to digital converter I1;
1 pin ground connection of resistance R 12,6 pins of 2 pins and integrated operational amplifier I3B, 1 pin of W2 links to each other;
1 pin of resistance R 9 links to each other with 1 pin of 6 pins of integrated operational amplifier I3B, resistance R 12, and 2 pins link to each other with 1 pin of W2;
1 pin of W2 links to each other with 2 pin of 6 pins of integrated operational amplifier I3B, resistance R 12, and 2 pins, 3 pins link to each other with 2 pins of I1,7 pins of integrated operational amplifier I3B,
1 pin of analog to digital converter I1 and 1 pin of integrated operational amplifier I3A, 2 of potentiometer W1,3 pins link to each other, 7 pins of 2 pins and integrated operational amplifier I3B, 2 of W2,3 pins link to each other, 3 pin ground connection, 4 pin ground connection, 5 pin ground connection, 6 pin ground connection, 7 pin ground connection, 8 pin ground connection, 9 pin ground connection, 10 pin ground connection, 11 pin ground connection, 12 pin ground connection, 13 pin ground connection, 14 pins meet VCC, 6 pins of 15 pins and resistance R * 8,5 pins of I5 link to each other, 5 pins of 16 pins and resistance R * 8,4 pins of I5 link to each other, 4 pins of 17 pins and resistance R * 8,3 pins of I5 link to each other, 3 pins of 18 pins and resistance R * 8,2 pins of I5 link to each other, 2 pins of 19 pins and resistance R * 8,1 pin of I5 links to each other, and 20 pins meet VCC;
1 pin of T4 links to each other with 1 pin of 2 pins of resistance R 5, resistance R X, and 2 pins link to each other with 1 pin of resistance R 15,2 pins of 3 pins and photoelectrical coupler T6;
1 pin of resistance R 15 links to each other with 2 pins of T4, and 2 pins link to each other with 1 pin of photoelectrical coupler T6,2 pins of resistance R 14,1 pin of resistance R 16;
1 pin ground connection of resistance R 14 resistance, 2 pins link to each other with 2 pins of resistance R 15,1 pin of T6,1 pin of resistance R 16;
Each pin that 1 pin of photoelectrical coupler T6 links to each other with 2 pins with resistance R 15 links to each other, and 2 pins link to each other with 3 pin of T4,1 pin of resistance R 19,2 pin of DY (2PIN), and 3 pins link to each other with 1 pin of triode T5, and 4 pins link to each other with 2 pin of resistance R 13;
1 pin ground connection of resistance R 13,2 pins link to each other with 4 pins of T6;
1 pin of triode T5 links to each other with 3 pins of photoelectrical coupler T4, and 2 pins link to each other with 2 pin of capacitor C 11,2 pin of resistance R 11, and 3 pins link to each other with the emitter of T7,2 pin of resistance R 19,1 pin of ZI (5V), 1 pin of capacitor C 12;
1 pin of resistance R 11 links to each other with 16 pins of single-chip microcomputer I5, and 2 pins link to each other with 2 pins of triode T5,2 pins of capacitor C 11;
1 pin ground connection of capacitor C 11,2 pins link to each other with 2 pins of resistance R 11,2 pins of triode T5;
(d) memory portion
This part major function is: each parameter during the storage system operation, store detected equipotential resistance.After having detected equipotential resistance, system automatically current detection to resistance value deposit in the storer.
The element annexation of this part is as follows:
1 pin of 32K memory I 4 links to each other with 1 pin of 12 pin of I5,32K memory I 6, and 2 pins meet VCC, 3 pin ground connection, 4 pin ground connection, 5 pins link to each other with 14 pins of I5,5 pins of I6, and 6 pins link to each other with 15 pins of I5,6 pins of I6,7 pin ground connection, 8 pins meet VCC;
1 pin of 32K memory I 6 links to each other with 1 pin of 12 pin of I5, I4,2 pin ground connection, 3 pin ground connection, 4 pin ground connection, 5 pins link to each other with 14 pins of I5,5 pins of I4, and 6 pins link to each other with 15 pins of I5,6 pins of I4 (32K storer), 7 pin ground connection, 8 pins meet VCC
(e) warning circuit part
This part external one little buzzer, it mainly is when the resistance value of measuring during greater than setting value, the usefulness of reporting to the police.The element annexation of this part is as follows:
The 1 pin ground connection of triode T1,2 pins link to each other with 1 pin of T2, and 3 pins link to each other with 2 pins of capacitor C 4,3 pins of T2,1 pin of resistance R 1;
2 pins of triode T2 link to each other with 2 pins of resistance R 7, and 3 pins link to each other with 3 pins of T1,2 pins of capacitor C 4,1 pin of resistance R 1, and 1 pin links to each other with 2 pins of T1;
1 pin of capacitor C 4 connects 2 pin of buzzer YD, and 2 pins link to each other with 3 pins of T1,3 pins of T2,1 pin of resistance R 1;
1 pin of resistance R 1 links to each other with 3 pins of 3 pins of T1, T2,2 pins of capacitor C 4, and 2 pins connect 2 pins of DY;
1 pin of resistance R 7 connects 17 pins of I5, and 2 pins connect 2 pins of T2; 1 pin ground connection of YD buzzer, 2 pin connect 1 pin of capacitor C 4.
Claims (1)
1, a kind of equipotential bonding resistance measuring instrument with memory function is characterized in that comprising following each several part and annexation thereof:
(a) power unit
The 1 pin ground connection of socket DY, 2 pins link to each other with 2 pins of stabilivolt ZI, 2 pins of resistance R 1,1 pin of resistance R 19,2 pins of resistance R 16,2 pins of T6,3 pins of T4,8 pins of integrated operational amplifier I3A;
1 pin of the stabilivolt ZI of 5V meets VCC, 2 pin ground connection;
1 pin of capacitor C 12 meets VCC, 2 pin ground connection;
Each pin that 1 pin of resistance R 19 links to each other with 2 pins with socket DY links to each other, and each pin that 2 pins link to each other with 1 pin with ZI is continuous;
The base stage 1 of triode T7 links to each other with 2 pins of resistance R 18, and collector 2 links to each other with 2 pins of light emitting diode BG, emitter 3 ground connection;
1 pin of resistance R 18 links to each other with 13 pins of single-chip microcomputer I5, and 2 pins link to each other with the base stage 1 of triode T7;
Each pin that 1 pin of light emitting diode BG links to each other with 1 pin with resistance R 19 links to each other, and 2 pins link to each other with the collector 2 of triode T7;
(b) main control unit part
1 pin of row's resistance R * 8 links to each other with power supply VCC, 2 pins link to each other with 19 pin of analog to digital converter I1,1 pin of single-chip microcomputer I5,3 pins link to each other with 18 pin of I, 2 pin of I5,4 pins link to each other with 17 pin of I1,3 pin of I5,5 pins link to each other with 16 pin of I1,4 pin of I5, and 6 pins link to each other with 15 pin of I1,5 pin of I5, and 7 pins link to each other with 6 pin of I5,6 pin of LCD CD, 8 pins link to each other with 7 pin of I5,5 pin of LCD, and 9 pins link to each other with 8 pin of I5,4 pin of LCD;
1 pin of single-chip microcomputer I5 and 2 pins of resistance R * 8,19 pin of I1 link to each other, 3 pins of 2 pins and resistance R * 8,18 pin of I1 link to each other, 4 pins of 3 pins and resistance R * 8,17 pin of I1 link to each other, 5 pins of 4 pins and resistance R * 8,16 pin of I1 link to each other, 6 pins of 5 pins and resistance R * 8,15 pin of I1 link to each other, 7 pins of 6 pins and resistance R * 8,6 pin of LCD link to each other, 8 pins of 7 pins and resistance R * 8,5 pin of LCD (liquid crystal display) link to each other, 9 pins of 8 pins and resistance R * 8,4 pin of LCD link to each other, 2 pins of 9 pins and capacitor C 1,1 pin of resistance R 6,2 pin of resistance R 10,2 pin of resistance R 8,7 pins of KEY link to each other, 10 pins link to each other with 12 pin of serial port communication chip I7,11 pins link to each other with 11 pin of I7,1 pin of 12 pins and 32K memory I 4,1 pin of 32K memory I 6 links to each other, 13 pins link to each other with 1 pin of resistance R 18,5 pins of 14 pins and I4,5 pins of I6 link to each other, 6 pins of 15 pins and I4, connect under 5 pins of I6,16 pins link to each other with 1 pin of resistance R 11,17 pins link to each other with 1 pin of resistance R 7,2 pin of 18 pins and J, 1 pin of capacitor C 3 links to each other, 1 pin of 19 pins and J, 1 pin of capacitor C 2 links to each other, 20 pins and GND () link to each other, 21 pins link to each other with 6 pins of clock chip I2,22 pins link to each other with 5 pins of I2,23 pins link to each other with 7 pins of I2,24 pins link to each other with 1 pin of KEY, 25 pins link to each other with 2 pins of KEY, 26 pins link to each other with 3 pins of KEY, 27 pins link to each other with 4 pins of KEY, 28 pins link to each other with 5 pins of KEY, 29 pins are unsettled, 30 pins are unsettled, 31 pins link to each other with VCC, 32 pins link to each other with 14 pin of LCD, 33 pins link to each other with 13 pin of LCD, 34 pins link to each other with 12 pin of LCD, 35 pins link to each other with 11 pin of LCD, 36 pins link to each other with 10 pin of LCD, 37 pins link to each other with 9 pin of LCD, 38 pins link to each other with 8 pin of LCD, 39 pins link to each other with 7 pin of LCD, 40 pins link to each other with VCC
1 pin of clock chip I2 connects each pin that VCC links to each other with 1 pin of resistance R S-232,2 pins link to each other with 2 pin of crystal oscillator JZ2,3 pins link to each other with 1 pin of JZ2,4 pin ground connection, 5 pins link to each other with 22 pin of single-chip microcomputer I5,6 pins link to each other with 21 pin of single-chip microcomputer I5, and 7 pins link to each other with 23 pin of single-chip microcomputer I5, and 8 pins link to each other with 1 pin of dc-battery E is anodal;
1 pin of dc-battery E links to each other with 8 pins of clock chip I2,2 pin ground connection,
1 pin of resistance R 10 links to each other with 5 pins of 28 pins of single-chip microcomputer I5, KEY, and 2 pins link to each other with 2 pins of resistance R 8,7 pins of KEY, 1 pin of resistance R 6,2 pin of capacitor C 1,9 pin of I5;
1 pin of resistance R 8 links to each other with 4 pins of 27 pins of single-chip microcomputer I5, KEY, and each pin that 2 pins link to each other with 2 pins with resistance R 10 links to each other;
1 pin of serial port communication chip I7 links to each other with 2 pins of capacitor C 5,2 pins link to each other with 2 pins of capacitor C 8,3 pins link to each other with 1 pin of capacitor C 5,4 pins link to each other with 2 pins of capacitor C 6,5 pins link to each other with 1 pin of capacitor C 6,6 pins link to each other with 2 pins of capacitor C 7, and 7 pins are unsettled, and 8 pins are unsettled, 9 pins are unsettled, 10 pins are unsettled, and 11 pins link to each other with 11 pins of single-chip microcomputer I5, and 12 pins link to each other with 10 pins of I5,13 pins link to each other with 3 pins of resistance R S-232,14 pins link to each other with 2 pins of resistance R S-232,15 pin ground connection, and 16 pins meet VCC;
1 pin of capacitor C 6 links to each other with 5 pins of serial port communication chip I7, and 2 pins link to each other with 4 pins of I7;
1 pin of capacitor C 5 links to each other with 3 pins of I7, and 2 pins link to each other with 1 pin of I7;
1 pin ground connection of electric capacity 105,2 pins meet VCC;
1 pin of capacitor C 8 meets VCC, and 2 pins link to each other with 2 pins of I7,
1 pin ground connection of capacitor C 7,2 pins link to each other with 6 pins of I7;
1 pin of capacitor C 1 meets VCC, and 2 pins link to each other with 1 pin single-chip microcomputer I5 of resistance R 6,9 pin of I5;
1 pin of resistance R 6 links to each other with 9 pin of 2 pin of capacitor C 1, I5,2 pin ground connection;
1 pin of capacitor C 2 links to each other with 19 pins of 1 pin of J, I5,2 pin ground connection;
1 pin of crystal oscillator J links to each other with 1 pin of 19 pin of I5, capacitor C 2, and 2 pins link to each other with 18 pin of I5,1 pin of capacitor C 3;
1 pin of capacitor C 3 links to each other with 2 pin of 18 pin of I5, J, 2 pin ground connection;
1 pin ground connection of resistance R 13,2 pins link to each other with 4 pins of T6;
1 pin ground connection of capacitor C 11,2 pins link to each other with the base stage pin 2 of triode T5,2 pin of resistance R 11;
16 pin of 1 pin I5 of resistance R 11 link to each other, and 2 pins link to each other with 2 pins of capacitor C 11,1 pin of triode T5;
(c) sampling and conversion portion
1 pin of R3 and two resistance of R4 is received the two ends of measuring resistance respectively, and the detection electric current enters testing resistance by two pin of T6, by resistance R 4, after resistance R 3 dividing potential drops, enters TLV2543 through amplification;
1 pin of resistance R x links to each other with 1 pin of resistance R 17,1 pin of resistance R 4 respectively, and 2 pin link to each other with 2 pin of resistance R 5,1 pin of T4 respectively;
Each pin that 1 pin of resistance R 17 links to each other with 1 pin with testing resistance Rx links to each other, and 2 pin link to each other with ground;
Each pin that 1 pin of resistance R 4 links to each other with 1 pin with testing resistance Rx links to each other, and 2 pin link to each other with 1 pin of resistance R 3,3 pins of integrated operational amplifier I3A;
1 pin of resistance R 3 links to each other with 3 pins of 2 pins of resistance R 4, integrated operational amplifier I3A, and 2 pins link to each other with ground;
1 pin of resistance R 9 links to each other with 1 pin of 2 pins of integrated operational amplifier I3A, potentiometer W1, and 2 pins link to each other with ground;
1 pin of integrated operational amplifier I3A links to each other with 2,3 pins of potentiometer W1 and 1 pin of I1, and 2 pins link to each other with 1 pin of resistance R 9,1 pin of potentiometer W1; 3 pins link to each other with 2 pins of resistance R 4,1 pin of resistance R 3, and 4 pins link to each other with ground, and 8 pins link to each other with+12V;
1 pin of potentiometer W1 links to each other with 1 pin of 2 pins of integrated operational amplifier I3A, resistance R 9, and 2 pins link to each other with 1 pin of 3 pins, integrated operational amplifier I3A, 1 pin of I1;
1 pin of resistance R 5 links to each other with 2 pin of 5 pins of integrated operational amplifier I3B, resistance R 2, and 2 pins link to each other with 1 end of testing resistance, 1 pin of T4;
1 pin ground connection of resistance R 2,2 pins link to each other with 5 pins of integrated operational amplifier I3B, 1 pin of resistance R 5;
5 pins of integrated operational amplifier I3B link to each other with 1 pin of 2 pins of resistance R 2, resistance R 5, and 6 pins link to each other with 1 pin of resistance R 19,2 pins of resistance R 12, and 7 pins link to each other with 2,3 pins of W2,2 pins of analog to digital converter I1;
1 pin ground connection of resistance R 12,2 pins link to each other with 6 pins of integrated operational amplifier I3B, 1 pin of W2;
1 pin of resistance R 9 links to each other with 1 pin of 6 pins of integrated operational amplifier I3B, resistance R 12, and 2 pins link to each other with 1 pin of W2;
1 pin of W2 links to each other with 2 pin of 6 pins of integrated operational amplifier I3B, resistance R 12, and 2 pins, 3 pins link to each other with 2 pins of I1,7 pins of integrated operational amplifier I3B,
1 pin of analog to digital converter I1 and 1 pin of integrated operational amplifier I3A, 2 of potentiometer W1,3 pins link to each other, 7 pins of 2 pins and integrated operational amplifier I3B, 2 of W2,3 pins link to each other, 3 pin ground connection, 4 pin ground connection, 5 pin ground connection, 6 pin ground connection, 7 pin ground connection, 8 pin ground connection, 9 pin ground connection, 10 pin ground connection, 11 pin ground connection, 12 pin ground connection, 13 pin ground connection, 14 pins meet VCC, 6 pins of 15 pins and resistance R * 8,5 pins of I5 link to each other, 5 pins of 16 pins and resistance R * 8,4 pins of I5 link to each other, 4 pins of 17 pins and resistance R * 8,3 pins of I5 link to each other, 3 pins of 18 pins and resistance R * 8,2 pins of I5 link to each other, 2 pins of 19 pins and resistance R * 8,1 pin of I5 links to each other, and 20 pins meet VCC;
1 pin of T4 links to each other with 1 pin of 2 pins of resistance R 5, resistance R X, and 2 pins link to each other with 1 pin of resistance R 15,2 pins of 3 pins and photoelectrical coupler T6;
1 pin of resistance R 15 links to each other with 2 pins of T4, and 2 pins link to each other with 1 pin of photoelectrical coupler T6,2 pins of resistance R 14,1 pin of resistance R 16;
1 pin ground connection of resistance R 14 resistance, 2 pins link to each other with 2 pins of resistance R 15,1 pin of T6,1 pin of resistance R 16;
Each pin that 1 pin of photoelectrical coupler T6 links to each other with 2 pins with resistance R 15 links to each other, and 2 pins link to each other with 3 pin of T4,1 pin of resistance R 19,2 pin of DY (2PIN), and 3 pins link to each other with 1 pin of triode T5, and 4 pins link to each other with 2 pin of resistance R 13;
1 pin ground connection of resistance R 13,2 pins link to each other with 4 pins of T6;
1 pin of triode T5 links to each other with 3 pins of photoelectrical coupler T4, and 2 pins link to each other with 2 pin of capacitor C 11,2 pin of resistance R 11, and 3 pins link to each other with the emitter of T7,2 pin of resistance R 19,1 pin of ZI (5V), 1 pin of capacitor C 12;
1 pin of resistance R 11 links to each other with 16 pins of single-chip microcomputer I5, and 2 pins link to each other with 2 pins of triode T5,2 pins of capacitor C 11;
1 pin ground connection of capacitor C 11,2 pins link to each other with 2 pins of resistance R 11,2 pins of triode T5;
(d) memory portion
1 pin of 32K memory I 4 links to each other with 1 pin of 12 pin of I5,32K memory I 6, and 2 pins meet VCC, 3 pin ground connection, 4 pin ground connection, 5 pins link to each other with 14 pins of I5,5 pins of I6, and 6 pins link to each other with 15 pins of I5,6 pins of I6,7 pin ground connection, 8 pins meet VCC;
1 pin of 32K memory I 6 links to each other with 1 pin of 12 pin of I5, I4,2 pin ground connection, 3 pin ground connection, 4 pin ground connection, 5 pins link to each other with 14 pins of I5,5 pins of I4, and 6 pins link to each other with 15 pins of I5,6 pins of I4 (32K storer), 7 pin ground connection, 8 pins meet VCC
(e) warning circuit part
The 1 pin ground connection of triode T1,2 pins link to each other with 1 pin of T2, and 3 pins link to each other with 2 pins of capacitor C 4,3 pins of T2,1 pin of resistance R 1;
2 pins of triode T2 link to each other with 2 pins of resistance R 7, and 3 pins link to each other with 3 pins of T1,2 pins of capacitor C 4,1 pin of resistance R 1, and 1 pin links to each other with 2 pins of T1;
1 pin of capacitor C 4 connects 2 pin of buzzer YD, and 2 pins link to each other with 3 pins of T1,3 pins of T2,1 pin of resistance R 1;
1 pin of resistance R 1 links to each other with 3 pins of 3 pins of T1, T2,2 pins of capacitor C 4, and 2 pins connect 2 pins of DY;
1 pin of resistance R 7 connects 17 pins of I5, and 2 pins connect 2 pins of T2;
1 pin ground connection of YD buzzer, 2 pin connect 1 pin of capacitor C 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251065 CN2594799Y (en) | 2002-12-05 | 2002-12-05 | Equipotential coupling resistor measuring device with storage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251065 CN2594799Y (en) | 2002-12-05 | 2002-12-05 | Equipotential coupling resistor measuring device with storage function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2594799Y true CN2594799Y (en) | 2003-12-24 |
Family
ID=33721054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02251065 Expired - Fee Related CN2594799Y (en) | 2002-12-05 | 2002-12-05 | Equipotential coupling resistor measuring device with storage function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2594799Y (en) |
-
2002
- 2002-12-05 CN CN 02251065 patent/CN2594799Y/en not_active Expired - Fee Related
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