CN2200188Y

CN2200188Y - Quick-acting line fault test meter

Info

Publication number: CN2200188Y
Application number: CN 94212733
Authority: CN
Inventors: 李鸿清
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-30
Filing date: 1994-05-30
Publication date: 1995-06-07
Anticipated expiration: 2004-05-30

Abstract

The utility model relates to a quick line correcting test meter used for checking cables and the wire sizes of wires, comprising a quick wire connecting device and a wire size display which are matched with each other in the mode of split to check the test of wire sizes when the utility model is used. Because the adoption of a reasonable concatenation test network, an indication network of an electric power source, an anti-interference network, and a light emitting diode, the utility model has the advantages of simple structure, convenient and rapid wire connection and wire detachment, visual and clear display, high measuring resolution, strong anti-interference, high accuracy rate which can reach one hundred percent, labor saving, time saving, the improvement of work efficiency, can not be influenced by the lengths of the cables and the environmental temperature, and can be used for the test of checking wire sizes at high speed in the installation and detection of wires in the post telephone and telegraph industry, the railway industry, etc.

Description

Quick-acting line fault test meter

The utility model relates to a kind of quick school line tester that is used to proofread the wire size of cable or electric wire.

In electrical engineering is installed, need proofread numbering to various cables or electric wire, Chinese patent CN922343713 provides a kind of quick school line box, this box internal fixation has the panel that binding post is housed, its below is fixed with the resistor network plate, and the lid that indicates resistance-wire size table of comparisons is fixed on the box body by bearing pin.Establish public line on the resistor network plate, resistance R 1, R2, after the R3 serial connection, the end of R1 is connected on No. 0 binding post that is connected with public line, the end of R3 is connected on No. 3 binding posts, its nodal line is connected to No. 1, on No. 2 binding posts, resistance R 4, R5, ... the end of Rn is connected on the public line, the other end then is connected to corresponding No. 4, No. 5 ... on the n binding post, though the work improvement that this utility model is made over needs two people to finish is that a people can finish, and improved accuracy rate, save time to a certain extent, laborsaving, improved work efficiency.But, because the resistance that its resistor network plate is different resistances constitutes, do not adjust resistance, precision is relatively poor.Each school line all needs to measure resistance according to the multimeter of an end, consult the resistance-wire size table of comparisons on the lid, could be to going out wire size, error takes place in multimeter reading sometimes, the precision of resistor network is relatively poor, cable length makes resistance increase when increasing, also can influence accuracy rate, even slips up when consulting the table of comparisons.Therefore, save time, laborsaving and further increase work efficiency aspect still not ideal enough, accuracy is not high, and is not directly perceived yet.

The purpose of this utility model is to propose a kind of quick school line tester of proofreading cable, electric wire at the deficiencies in the prior art and shortcoming, it can improve the degree of accuracy of school line, it is accurate, directly perceived, fast to show, simple to operate, easy to use, error on can not judging makes rate of accuracy reached to 100%.

Quick school line tester shown in the utility model comprises one by the battery powered Speed wiring device of 9V and a wire size display.Speed wiring device and the split of wire size display in use of this tester cooperates the test of carrying out check line number.Speed wiring device comprises panel and corresponding circuit, 36 binding post of the spring are arranged on the base plane, indicate wire size (1～36) respectively, also has public termination terminal (38), common line is differentiated termination terminal (39), (40), and power switch (37) and power light (41), its circuit is formed the series connection test network by corresponding 36 precision resistances, and forms the power supply indication network by resistance, voltage stabilizing diode, light emitting diode and battery.The wire size indicator comprises panel and corresponding circuit, there are 36 on its panel and indicate respective digital, the light emitting diode (50) that shows wire size, also have 4 binding post of the spring, be respectively public end COM(45), common line is differentiated end X01(46), X02(47) and test lead Xn(48), and be provided with power light (42) and (43), represent that respectively voltage is normal and low excessively, and switch (44), its circuit comprises 2～12 homemade SF3914 of LM3914() test chip (49) and 36 pieces of light emitting diodes (50), and corresponding 2～12 resistance, be provided with anti-interference network at input end.

Speed wiring device in the line tester of school is owing to the network structure that adopts precision resistance to be composed in series fast, and this is simple in structure, and the resolution height.The binding post of the spring contact is reliable, disconnects line conveniently.Power supply is indicated the low supervision of double as cell voltage, can make full use of the usefulness of battery, guarantees that test check and correction wire size is accurate.Its wire size display, by the diode displaying wire size, lamp is bright can read wire size, intuitively clear, can not make mistakes.Except public end COM(45) connect the common line, all the other respectively hold X01(46), X02(47) Xn(48) only need and will be touched with it by survey line, can read wire size.Brownout pilot lamp (43) one is bright, changes battery immediately, and it is accurate to guarantee to proofread wire size.Test chip is provided with reference source in (49), thus the resolution height, the input impedance height, the serviceability temperature tolerance limit is wide, and the voltage adaptation scope is bigger, and the battery utilization factor is higher.Anti-interference filter has improved interference free performance in the anti-interference network, and this tester is not subjected to the influence of environment temperature, cable length when using, the accuracy height, and usable range is wide.

Therefore, the utlity model has that test is accurately rapid, simple to operate, easy to use, intuitive display is clear, strong interference immunity, resolution advantages of higher, and be not subjected to the influence of cable length and environment temperature, rate of accuracy reached to 100%.

Fig. 1 is the structural drawing of Speed wiring device panel;

Fig. 2 is the Speed wiring device electrical schematic diagram;

1～36 is binding post of the spring among the figure, and 37 is power switch, and 38 is public termination terminal, and 39,40 are common line differentiation termination terminal, and 41 is power light.

Fig. 3 is the structural drawing of wire size display pannel;

Fig. 4 is a wire size display electrical schematic diagram.

42 is power light among the figure, and 43 is the brownout pilot lamp, and 44 is switch, and 45 is public end, and 46,47 are common line differentiation end, and 48 is test lead, and 49 is test chip, and 50 is 36 pieces of light emitting diodes, and 51 is resistance.

Introduce embodiment below in conjunction with accompanying drawing.

A quick school line tester comprises Speed wiring device and wire size display two large divisions, and split in use cooperates carries out check line number test.

The panel construction of Speed wiring device as shown in Figure 1,36 binding post of the spring (1～36) that indicate the wire size numeral are arranged on it, a public termination terminal COM(38), two common lines are differentiated termination terminal X01, X02(39), (40), power switch (37) and power light 41.Its inner structure is shown in Fig. 2 electrical schematic diagram, form the series connection test network by the precision resistance of 36 12K Ω ± 1%, adopt 9V battery, 2DW232 voltage stabilizing diode, 2CP11 diode, HLR light emitting diode and resistance R 1, R2, R3, RP to form and guarantee to test power supply indication network accurately.

The panel construction of wire size display as shown in Figure 3,36 light emitting diodes (50) that indicate 1～36 respective digital are arranged on it, also have 4 binding post of the spring, be respectively public end (45), common line and differentiate end (46), (47) and test lead (48), and be provided with power light (42), voltage is crossed pilot lamp (43) and switch (44).Its inner structure is shown in Fig. 4 electrical schematic diagram, use the 9V powered battery, by 4 models is the homemade model SF3914 of LM3914() test chip (49), 36 pieces of light emitting diodes, resistance (51) R2, R3, R4, R5 form test circuit, input end is formed the anti-interference filter network by R1, C1, C2.

This is simple in structure than the line tester fast, the test is accurately rapid, easy and simple to handle, intuitive display, strong interference immunity, resolution height, be not subjected to cable length and ambient temperature effect, accuracy rate is 100%, be a kind of testing tool of desirable check and correction wire size, the quick check and correction wire size test during the circuit that is applicable to industries such as post and telecommunications, railway is installed and detected.

Claims

1, a kind of quick school line tester of proofreading cable, electric wire wire size is characterized in that it comprises one by the battery powered Speed wiring device of 9V and a wire size display.

2, school according to claim 1 line tester, it is characterized in that described Speed wiring device comprises panel and corresponding circuit, 36 binding post of the spring (1～36) are arranged on its panel, indicate wire size respectively, also has public termination terminal (38), common line is differentiated termination terminal (39), (40), and power switch (37) and power light (41), its circuit is formed the series connection test network by corresponding 36 precision resistances, and forms the power supply indication network by resistance, voltage stabilizing diode, light emitting diode and battery.

3, school according to claim 1 line tester, it is characterized in that described wire size indicator comprises panel and corresponding circuit, there are 36 on its panel and indicate respective digital, the light emitting diode (50) that shows wire size, also have 4 binding post of the spring, be respectively public end (45), common line is differentiated end (46), (47) and test lead (48), and be provided with power light (42) and brownout pilot lamp (43), represent that respectively voltage is normal and low excessively, and switch (44), its circuit comprises 2～12 homemade SF3914 of LM3914() test chip (49) and 36 pieces of light emitting diodes (50), and 2～12 resistance (51), be provided with anti-interference network at input end.