CN201852901U

CN201852901U - Cable detection device

Info

Publication number: CN201852901U
Application number: CN2010205886887U
Authority: CN
Inventors: 邱大宝; 张君彦; 信凯
Original assignee: Dalian Maritime University
Current assignee: Dalian Maritime University
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-06-01
Anticipated expiration: 2020-10-29

Abstract

A cable detection device mainly comprises a cable inserting terminal, a switch, a single chip microcomputer module, a power supply, an LED (light-emitting diode) indicator lamp and the like which are connected in sequence. The cable detection device is simple in structure, is convenient to carry and can detect a channel state of a cable before use so as to ensure that the bus is correctly connected with the terminal, thereby reducing unnecessary troubles and error analysis caused in the process of installation and test on engineering.

Description

The winding displacement pick-up unit

Technical field

The utility model relates to electronic device field, relates in particular to a kind of winding displacement pick-up unit.

Background technology

Raising along with the product integrated level, the use of winding displacement is tending towards day-to-day gradually, but between its structure and special environment for use, the probability that breaks down in assembling process is very big, during particularly for the Installation and Debugging process of some emulation, analog machine, terminal occurs and patch not firm, link to each other passage short circuit and situations such as terminal and winding displacement loose contact and happen occasionally, if can not in time find, error analysis will occur, have a strong impact on project progress; The winding displacement fault brings unnecessary trouble also can for the maintenance and the test of a lot of electric equipments simultaneously.Winding displacement is the set version of lead, and failure rate was very low when it dispatched from the factory, but the passage of winding displacement is more, need link to each other with the plug terminal of special use during use, is easy to this moment cause fault to take place frequently because clamp down on improper.Need before use it to be checked for this reason, but also do not have checkout equipment effectively on the market at present.

The utility model content

Because winding displacement or winding displacement are connected the improper unnecessary failure problems that causes with terminal, the utility model provides a kind of winding displacement pick-up unit in order to get rid of.

The technical scheme that the utility model is adopted for achieving the above object is: a kind of winding displacement pick-up unit is characterized in that: comprise that winding displacement inserts sub-end, switch, one-chip computer module, power supply and LED light, each several part connects successively.

The quantity that described winding displacement is inserted the son end is 2.

Described power supply is the 5V direct supply.

LED light quantity is identical with the slotting son end of winding displacement contact pin number and the position is corresponding.

Winding displacement pick-up unit of the present utility model, simple in structure, easy to carry, can detect winding displacement channel status before use, guarantee that the connection of winding displacement and terminal is errorless, and then caused unnecessary trouble and error analysis when reducing on engineering Installation And Test.

Description of drawings

Fig. 1 is the structural drawing of the utility model winding displacement pick-up unit;

Fig. 2 is winding displacement and splicing ear structural drawing thereof;

Fig. 3 is the inner catenation principle figure of the one-chip computer module of the utility model winding displacement pick-up unit;

Embodiment

As depicted in figs. 1 and 2, the winding displacement pick-up unit is mainly inserted son end 3, switch, one-chip computer module 4, power supply and LED light 5 etc. by winding displacement 2 and is constituted, each several part connects successively, when making, each parts are placed on the circuit board, can reduce the volume of equipment, improve the stable and portable of device simultaneously, winding displacement 2 and splicing ear 1 thereof belong to peripheral Devices to test.This device constitutes a complete closed-loop path by means of power supply, LED light and winding displacement 2 and splicing ear 1 thereof to be measured, realize the conducting successively of winding displacement 2 each passages and the setting of some specific functions by single-chip microcomputer internal control program, thereby can check the connection status of winding displacement 2 after installing splicing ear, normal condition should circulate " glittering " in turn, and can winding displacement 2 normally use after terminal had been clamped down in judgement on this basis.

The single-chip microcomputer specification that device is selected for use is 89C51, and it is P that this single-chip microcomputer has only four parallel I/O ports ₀, P ₁, P ₂, P ₃Four ports, each interface just say also that to the external pin with 8 I/O mouths this single-chip microcomputer at most also can only have 32 I/O mouths, and the port number (being 40 to the maximum) that this far can not satisfy present market winding displacement needs the port of 89C51 single-chip microcomputer is expanded for this reason.As shown in Figure 3, at P _0.0, P _0.1, P _0.274HC595 of three pin place expansions (parallel Output Shift Register is changeed in the input of 8 bit serial) module, this module has 8 I/O mouth external pins, has promptly expanded 5 pins; Equally at P _0.3, P _0.4, P _0.5Pin place and P _0.6, P _0.7, P _1.0The place respectively adds a 74HC595 module again, and this sample single-chip microcomputer just increases to 47 by the number of pins after expanding, and is enough to satisfy present winding displacement 2 largest passages numbers.Simultaneously also increased a MAX485 chip, can be used for this measurement equipment and link to each other, increased the debug performance of device with apparatus such as computer at the single-chip microcomputer place.At the remaining P of single-chip microcomputer _3.3, P _3.4, P _3.5, P _3.6The pin place connects toggle switch 6, four control knobs are arranged on this switch, selecting different switches can trigger the inner different program of single-chip microcomputer is setting value time delay that adjacent signals sends, this setting value has determined between two lamps of adjacent LED " glittering " required interval time in succession, so just can change lamp and dodge frequency; The turn on process successively of winding displacement passage then is that the cycle signal that is sent by single-chip microcomputer decides during for test.Selected supply voltage is the 5V direct current, the contact pin number of the slotting son end 3 of checkout equipment is identical with LED light 5 numbers and the position is corresponding, the two number can increase when making finished product to be suitable for the winding displacement requirement to be measured of different port numbers, the general requirement gets final product (being 40 passages at present) greater than present used on the market maximal value, only is the sketch for principle of specification herein.

In order to prevent when clamping down on, to break down between winding displacement and splicing ear, need before use it to be detected.Testing process: the splicing ear 1 that at first will connect winding displacement holds 3 to join with the slotting son of checkout equipment, at this moment checkout equipment and winding displacement 2, loop of splicing ear 1 formation to be measured; After determining that the two connection is errorless, can press switch S and make above-mentioned circuit closed.The flow through one-chip computer module of checkout equipment inside of electric current activates wherein program, make each passage in the winding displacement 2 by single-chip microcomputer from P ₀To P ₃Send the sequential loop conducting of signal successively, this moment on the LED display panel with each passage corresponding LED pilot lamp 5, circulation " glittering " phenomenon can appear, whether normal according to each channel function that detects winding displacement whereby.Basis for estimation:, illustrate that clamping down on of winding displacement is in good condition can normally use as the LED light 5 of equipment normal " glittering " successively; Have in the cyclic process lamp normally " glittering " or do not work then say winding displacement right this passage obstructed, need clamp down on again; It is simultaneously bright to occur several lamps in the cyclic process, then illustrate their pairing passages may be at the terminal place or other place short circuit appears.

Claims

1. winding displacement pick-up unit is characterized in that: comprise that winding displacement inserts son end (3), switch, one-chip computer module (4), power supply and LED light (5), each several part connects successively.

2. a kind of winding displacement pick-up unit according to claim 1 is characterized in that: the quantity that described winding displacement is inserted son end (3) is 2.

3. a kind of winding displacement pick-up unit according to claim 1 is characterized in that: described power supply is the 5V direct supply.

4. a kind of winding displacement pick-up unit according to claim 1 is characterized in that: LED light (5) quantity is identical with the slotting son end of winding displacement (3) contact pin number and the position is corresponding.