CN202433469U

CN202433469U - False-plugging prevention system for test table of virtual instrument

Info

Publication number: CN202433469U
Application number: CN 201120532682
Authority: CN
Inventors: 李辛; 喻波
Original assignee: Luoyang Institute of Electro Optical Equipment AVIC
Current assignee: Luoyang Institute of Electro Optical Equipment AVIC
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2012-09-12
Anticipated expiration: 2021-12-19

Abstract

The utility model relates to a false-plugging prevention system for a test table of a virtual instrument; the system comprises a cable switching board, a universal cable switching plug, an adapter front panel plug, an adapter rear panel plug and a special cable switching plug, which are sequentially connected into a loop through a lead; the start end and the terminal of the loop are arranged on different pins of the cable switching board; the pin of the start end is further connected with an output contact of a universal switch; and the pin of the terminal further is connected to the test end of a universal meter module. The system is simple in principle and convenient to operate; and the situation of false-plugging of plugs in the product test can be avoided thoroughly.

Description

The test cable of virtual instrument is prevented the wrong plug system

Technical field

The utility model belongs to the virtual instrument technical field of measurement and test, relates to a kind of anti-wrong plug system of test cable of virtual instrument.

Background technology

The anti-wrong plug technology of traditional test cable is to realize though this method can effectively prevent the plug wrong plug, a very big problem being arranged through the plug that adopts the anti-wrong plug key of band; Miss if any plug exactly, detector can't find fully, will report an error during test products; If the commissioning staff lacks experience, will suspect earlier that product is out of joint, be to change assembly not only but also be to change veneer; Just finding at last has plug not connect; This phenomenon often takes place in that debugging is on-the-spot, therefore this traditional anti-wrong plug means are improved necessary, the situation that plug is missed in the time of should thoroughly having stopped product test.

Summary of the invention

The purpose of the utility model provides a kind of anti-wrong plug system of test cable of virtual instrument, misses problem to solve the plug that existing method exists.

For realizing above-mentioned purpose; The anti-wrong plug systems technology scheme of the test cable of the virtual instrument of the utility model is following: this system comprises through lead and connects the transit cable plate that constitutes a loop, general transit cable plug, adapter front panel plug, adapter rear panel plug and special-purpose transit cable plug in order; The top in this loop and terminal are on the different contact pins of transit cable plate; Also link to each other with an output contact of universal switch on the top contact pin, the terminal contact pin also links to each other with the test lead of multimeter module.

The test cable error protection system of the virtual instrument of the utility model; Utilize lead between transit cable plate, general transit cable plug, adapter front panel plug, adapter rear panel plug and special-purpose transit cable plug, to constitute a loop; During test; The input contact place corresponding at the universal switch output contact powers on, and through the output voltage in multimeter module testing loop, can confirm whether the plug in this loop connects through the multimeter reading again; The utility model principle is simple, easy to operate, the situation that plug is missed when thoroughly having stopped product test.

Description of drawings

Fig. 1 is a PXI test macro block diagram;

Fig. 2 is the circuit wiring diagram of embodiment.

Embodiment

PXI test macro with main flow in the virtual instrument is that example describes, and other virtual instrument instrument is similar with it.

(1) the PXI test macro is formed and function

Conventional PXI test macro should consist of the following components: PXI main frame, test product adapter, universal cordage, private cable, test product.The block diagram of system is as shown in Figure 1.

Test macro each several part composition and function declaration are following:

(a) PXI main frame

The PXI main frame should comprise rack, PXI mainframe box and module, display, power supply and transit cable plate etc.Power supply is used for to product required various power supply being provided; Because the external plug-in mounting of PXI module is not easy-disassembling-assembling circular socket, need the signal on each PXI module be wired on the circular socket of transit cable plate; PXI mainframe box and functional module are used to simulate the required various pumping signals of test product; And the various signals of detection test product generation; The PXI functional module has a lot; For example universal switch module, multi-way switch module, multimeter module and IO module etc., concrete functional module is selected for use according to testing requirement, but universal switch module and multimeter module will be used certainly.

(b) test product adapter

If adopt test cable directly to connect the mode of test product and main frame; The test cable number that needs can be a lot, and the cable severity that interweaves, and make cable design too complicated; Cable is installed too loaded down with trivial details; Localization of fault during to system debug is also very unfavorable, and between system under test (SUT) and checkout equipment adapter of design, the various types of signal of test product is connected the fault location time will inevitably reduce the quantity of debugging cable and product test significantly the time again with main frame after adapter is sorted out;

Adapter is made up of rear panel and front panel, and the socket of respective numbers is respectively arranged on the front and back panel.

(c) debugging cable

The debugging cable is divided into two parts, and a part is a private cable, directly the signal on each socket of test product is connected on the front panel of adapter, and private cable does not wait from one to many according to testing requirement; Another part is a universal cordage, with in adapter, sorted out signal be connected on the switching panel of PXI main frame, universal cordage does not wait from one to many according to testing requirement.

(2) the anti-wrong plug method of test cable

The anti-wrong plug means of traditional test plug are to adopt the plug of the anti-wrong plug key of band to realize; Though this method can effectively prevent the plug wrong plug; But it has a very big defective, and the plug that is exactly universal cordage is missed, and test macro can't find fully; Therefore it is necessary the anti-wrong plug means of traditional test jack being improved, the situation that the universal cordage plug was missed when this method had thoroughly been stopped product test.

Method is following: at first utilize lead between transit cable plate, general transit cable plug, adapter rear panel plug, to constitute a loop; The top in loop is certain contact pin of certain plug of transit cable plate; This root contact pin links to each other with certain output contact of universal switch again, and the terminal in loop is on another contact pin of the same cable of transit cable plate, and this root contact pin links to each other with the positive pole of the test lead of multimeter module again simultaneously; Like this when the detector self check; The input contact place corresponding at the universal switch output contact adds a 27V voltage, connects this contact, road of universal switch then, and whole loop has just added; The last output voltage that passes through multimeter module testing loop again is if multimeter demonstration output voltage is about 27V then explains that the plug in whole loop has all connected.The rest may be inferred; Can each plug of other each universal cordage that need test be linked into respectively in the different loops, when the detector self check, call and write the anti-subroutine of missing of test plug in advance; Detect each loop successively, the problem that plug is missed when having solved product test fully like this.

Universal cordage does not wait according to testing requirement quantity, misses method the utility model thinking is described so that the test plug of universal cordage 1 is anti-below, and it is similar with it that other universal cordage anti-missed method.The test loop wiring diagram is seen Fig. 2.

Universal cordage is missed when preventing product test; Utilize lead the test plug 1 of 1 contact pin of the socket 1 of the contact 2 of universal switch module 1, transit cable plate, universal cordage 11 contact pin, universal cordage 1 test plug 2 the positive pole of 160 contact pins and multimeter module of socket 3 of 1 contact pin, transit cable plate of socket 1 of rear panel of 1 contact pin, adapter between constitute a loop; When the detector self check, connect the contact 1 of universal switch module 1 and the relay between the contact 2 through software command; The 27V power supply just has been added to the positive pole of multimeter module through the loop like this; The last value that reads multimeter again through software command equals 27V like it and just can explain that universal cordage 1 connects correctly.Can other universal cordage be connected in each loop by that analogy; And can test other test plug according to the test thinking establishment simple program of test plug 1; At last each test plug test procedure is packaged into the anti-subroutine of missing of test plug; And called before each product test that test plug is anti-misses subroutine, and pass through like subroutine test, explain that then all universal cordages all do not miss.

Claims

1. the test cable of a virtual instrument is prevented the wrong plug system; It is characterized in that: this system comprises through lead and connects the transit cable plate that constitutes a loop, general transit cable plug, adapter front panel plug, adapter rear panel plug and special-purpose transit cable plug in order; The top in this loop and terminal are on the different contact pins of transit cable plate; Also link to each other with an output contact of universal switch on the top contact pin, the terminal contact pin also links to each other with the test lead of multimeter module.