CN2330996Y

CN2330996Y - Digital paired line device

Info

Publication number: CN2330996Y
Application number: CN 98211463
Authority: CN
Inventors: 纪连勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-27
Filing date: 1998-04-27
Publication date: 1999-07-28
Anticipated expiration: 2008-04-27

Abstract

The utility model belongs to a detecting device and the utility model relates to a digital paired line device for detecting cable line number. The paired line device is composed of a line number displayer and a line number connection box; the line number displayer is composed of an omega/V converting circuit formed by an ISC7106 integrated circuit as core and a liquid crystal display chip; the displayer is provided with an instrument pen jack and a common port jack; the line number connection box is provided with connecting terminals marking the line number; a Komega value resistor whose integer value consists with the bit line number is connected between each connecting terminal and the common port connecting terminal. The utility model has the remarkable advantages of simple circuit structure, small size, convenient portability, and convenient operation.

Description

Digital line connector

The utility model belongs to pick-up unit, relates to a kind of digital line connector that the cable wire size detects.

In cable construction, maintenance and during large-sized cable rolls needs all each heart yearn to be determined or appraised and decided numbering more general adopts hummer or megger to search by line to the line mode that its speed is quite slow.In recent years, the digital line inspection device of direct-reading was also used to some extent, and it is by code sender and connect a yard device and forms, and each wire size is made of 20 Bits Serial Code, and its circuit structure is complicated, and big inconvenient outdoor the carrying of volume manipulated.

The purpose of this utility model provides the digital line connector that a kind of circuit structure is simple, volume is little, be easy to carry and use.

Above-mentioned purpose is achieved by the following technical programs: this line connector is made of wire size display 1 and wire size terminal box 7 two parts, i.e. Ω/V the change-over circuit of 31/2 double integration A/D converter rule of three measured resistance value that is core with integrated circuit ISC7106 is housed in the wire size display, and printed-wiring board (PWB) 2 and the supplying cell formed by the direct LCD driven chip of LCD of this circuit output end, the CK test pencil jack 3 of the measuring voltage input end of ISC7106 integrated circuit and wire size display joins, and the wire size display also is provided with COM common port jack 4; Wire size terminal box 7 is provided with binding post 8 and the COM common port binding post 10 that indicates wire size, wire size is for being connected to the resistance of the 1K Ω order of magnitude between the binding post of " 1 " and the common port binding post COM, other binding post is increased the resistor of 1K Ω resistance successively by turn to a high position by low level to the common port binding post.

The pin 1 of IC1ISC7106 connects resistance R 2 one ends of reference resistance R0, clamp diode D1 and reference voltage trimming circuit respectively through resistance R 1, and IC1 pin 36VREF+ end, the reference resistance R0 other end connects test pencil jack 3 and resistance R 7 through posistor RT, this resistance R 7 another termination IC1 pin 31IN+ end, IC1 pin 30IN one end to ground, is connected to capacitor C 4 between the pin 31,30 through resistance R 8; The reference resistance R0 other end also connects IC1 pin 35VREF one end through resistance R 6, is connected to capacitor C 2 between the IC1 pin 35,36; The reference resistance R0 other end also is connected to protective transistor TR1 emitter, its base stage, grounded collector; By the reference voltage trimming circuit one termination IC1 pin 1 that resistance R 3, potentiometer W1, resistance R 4 are in series, other end ground connection, resistance R 2 other ends and the adjustable end of potentiometer W1 join; IC1 pin 40OSC1 end connects IC1 pin 38OSC3 end, pin 39OSC2 end through capacitor C 1, resistance R 5 respectively; IC1 pin 28BUF end, pin 29CAZ end join with the capacitor C 2 of IC1 pin 27INT end through resistance R 9, capacitor C 5 respectively; LCD drive output a2-g2, the a3-g3 of IC1 connect LCD31/2 position chip of LCD respective input respectively.

Below with drawings and Examples explanation the utility model.

Accompanying drawing 1 the utility model structural representation

Accompanying drawing 2 wire size display electrical schematic diagrams

Accompanying drawing 3 wire size terminal box electrical schematic diagrams

Among the figure: 1 wire size display, 2 printed-wiring board (PWB)s, 3 test pencil jacks, 4 public end jacks, 5 test pencils, 6 cables, 7 wire size terminal boxes, 8 binding posts, 9 wire sizes, 10 public termination terminals.

Embodiment as shown in Figure 1, its line connector is made up of wire size display 1 and wire size terminal box 7, public end jack 4 of COM and the public termination terminal 10 of COM all should reliable grounds during use, one end of cable 6 each heart yearn is fixing by each binding post 8 of wire size terminal box 7, the test pencil 5 of test pencil jack 3 contacts one by one with the other end of each heart yearn of cable, then the wire size display will show the wire size 9 corresponding wire sizes that marked with the wire size terminal box, and its principle of work is seen Fig. 2,3.

The Ω that it is core that the printed circuit board (PCB) 2 of wire size display is equipped with 31/2 double integration A/D converter IC1ISC7106 chip/V change-over circuit, resistance R 1-4 and potentiometer W1 provide fine-tuning test voltage among the figure, reference resistance R0 and posistor RT, measured resistance RX are in series, the terminal voltage of its reference resistance R0 is reference voltage V RO, the terminal voltage of measured resistance RX is an input voltage VIN, then RX=R0VIN/VRO has realized Ω/V conversion.

The IC1ISC7106 chip has counting, decoding and driving function, can directly drive the LCD chip of LCD, the LCD of present embodiment selects 31/2 chip of LCD for use, a2-g2, the a3-g3 output terminal of two whole word inputs and IC1ISC7106 join, so K Ω round values of liquid crystal display measured resistance Rx, clamp diode D1 makes pin 36VREF+＜2V of IC1 among the figure, resistance R 6, capacitor C 2 and resistance R 7, capacitor C 4 are rc filter circuit, resistance R 9, capacitor C 3 are integrating circuit, and resistance R 5, capacitor C 1 are the Resistor-Capacitor Unit of clock circuit.

Measured resistance Rx is determined by the public termination terminal 10 set resistance values of each binding post 8 and COM in the wire size terminal box 7, for adapting to the resistor nominal value range, wire size is the resistance of 1.4K Ω for the binding post of " 1 " is connected to R1A1.2K Ω and R1B200 Ω total resistance that is in series, wire size is the resistance that 2 binding post then is connected to 2.4K Ω, below each binding post by low level to the high-order resistance that all increases 1K Ω successively.The wire size terminal box of present embodiment is established 24 wire sizes and binding post altogether, the binding post of the 24th wire size then is connected to the resistance of 24.4K Ω, each resistance is provided with beyond the purpose deconditioning resistance nominal value of decimal, also in order to guarantee reliably to show the round values of K Ω, i.e. and the wire size that should read.

Can find out that by above analysis this line connector comes down to a typical digital K Ω value sheet resistance measurement, the utility model is compared with the digital line inspection device of pulsing circuit, because of adopting large scale integrated circuit to realize that Ω/V conversion makes circuit structure simple, this programme can utilize various digital multimeter to measure K Ω shelves easily and be changed a social system.

The utlity model has that circuit structure is simple, volume is little, be easy to carry, easy to use Remarkable advantage.

Claims

1, digital line connector, formed by wire size display and wire size terminal box, it is characterized in that: the i.e. Ω/V change-over circuit of 32/1 double integration A/D converter rule of three measured resistance value that is core with integrated circuit ISC7106 is housed in the wire size display, and printed-wiring board (PWB) and the supplying cell formed by the direct LCD driven chip of LCD of this circuit output end, the detection voltage input end of ISC7106 integrated circuit and the CK of wire size display detect jack and join, and the wire size display also is provided with COM common port jack; The setting of wire size terminal box indicates the binding post and the COM common port binding post of wire size, wire size is for being connected to the resistance of the 1K Ω order of magnitude between the binding post of " 1 " and the common port binding post COM, other binding post is increased the resistor of 1K Ω resistance successively by turn to a high position by low level to the common port binding post.

2, line connector as claimed in claim 1, it is characterized in that: the pin 1 of IC1ISC7106 connects resistance R 2 one ends of reference resistance R0, clamp diode D1 and reference voltage trimming circuit respectively through resistance R 1, and IC1 pin 36VREF+ end, the reference resistance R0 other end connects test pencil jack and resistance R 7 through posistor RT, resistance R 7 another termination IC1 pin 31IN+ end, IC1 pin 30IN one end to ground, is connected to capacitor C 4 between the pin 30,31 through resistance R 8; The reference resistance R0 other end also connects IC1 pin 35VREF one end through resistance R 6, is connected to capacitor C 2 between the IC1 pin 35,36; The reference resistance R0 other end also is connected to protective transistor TR1 emitter, its base stage, grounded collector; By the reference voltage trimming circuit one termination IC1 pin 1 that resistance R 3 potentiometer W1, resistance R 4 are in series, other end ground connection, resistance R 2 other ends and the adjustable end of potentiometer W1 join; The OSC1 of IC1 pin 40 end connects the OSC3 end of pin 38 of IC1 and the OSC2 end of pin 39 through capacitor C 1, resistance R 5 respectively; IC1 pin 28BUF end, pin 29CAZ end join with the capacitor C 2 of IC1 pin 27INT end through resistance R 9, capacitor C 5 respectively; LCD drive output a2-g2, the a3-g3 of IC1 connect LCD31/2 position LCD plate respective input respectively.