Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
  • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
  • G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
  • G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
  • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
  • G01R31/58—Testing of lines, cables or conductors

Definitions

• the present invention relates to an improvement to automatic test benches of sets of conductors, such as, in particular, multi-conductor cables, shielded or coaxial, or bundles of conductors intended to be used in particular on circuits. electronic, telephone, remote control or other mounted on vehicles or aircraft.
• the cabling * or bundles of c conductors of this kind are very complex and it therefore becomes necessary to develop automatic benches so that the different equipotentials can be switched to different means of control.
• the automatic benches currently known comprise two buses to which each access equipotential can be interchanged indifferently by means of relay switching. It is thus possible to isolate one or more equipotential, constituted, for example by conductors or shields, to connect them to a measurement equipment while the others, whose relays are left at rest, remain connected to a common potential. for example by grounding. These benches are sufficient to check a continuity by applying a current generator on one of the conductors and measuring on the other, or by applying a high voltage on one of the buses and massing the other.
• the present invention therefore proposes to improve the automatic test benches for a set of conductors so as to be able to carry out such checks automatically on bundles or set of conductors, in particular shielded or coaxial.
• Another objective of the invention is to produce such an improved bench which is of simple construction and which uses a reduced number of costly elements while being likely to a very large extent to be subjected to self-checking operations. control for night vi b d r any defects of the bench.
• the subject of the invention is an improvement to automatic test benches for sets of conductors in which a plurality of access points, intended to be connected individually to the different individual conductors of the bundle or of the set of conductors are capable of being connected, by means of automatic control, to buses, that is to say common lines, capable themselves of being connected, by means of automatic control, to test elements and operation, comprising in particular grounding means, current and voltage sources and measuring means, characterized in that each access point is capable of being switched alternately, by relays with automatic control / with three different buses.
• the access point can be connected by means of three independent independent relay switches, which allows all possible combinations over the totality of the access points.
• the switches of the pairs of impa and even access points are respectively connected two by two to be actuated by a single relay, which allows a great economy of relays.
• a fourth embodiment of the inventi allows a great economy in relay while authorizing all the applications which require only the isolati of only two access points, all the others were united to a common potential.
• the access points are grouped into a certain number of sets of N., said points being connected to respective switches driven by a relay N times RT so as to be simultaneously connected either to a first assembly of bus in which each individual line is connected to an output only of each relay, either to a second relay N times RT whose switches are capable of being all connected or to a second set of buses do the individual lines are connected to a output of each relay, or to a third bus channel preferably comprising a single bus line connected to the total of the second outputs of said second relay.
• the three bus assemblies are capable of being connected to three lines themselves connected to the control and operating means, and this by means of 3xN simple relays (1RT) in a way that can prohibit that two silk access connected simultaneously to the same measurement channel.
• Figure 1 shows a schematic bench view according to a first embodiment of the invention
• FIG. 2 represents a schematic view of a bench element according to a second embodiment
• FIGS 3 and 4 show diagrams of the third embodiment.
• Figures 5 and 6 show diagrams of the fourth embodiment according to the invention. 10 We first refer to Figure 1.
• the ban schematically comprises a certain number of access points of which only the first two, 1, 2 and the last, n, have been shown.
• Each access point is, for example 15 constituted by a terminal to which one can connect the end of a conductive element of a bundle of cables, with savoi for example, a shielding or a shielded cable conductor
• the different access points are connected to three switching elements made up, in fact, each time, of three • 20 relays Ri, R2 and R3 capable of actuating a switch. If all the organs Ri, R2, R3, are open, the access point, for example, the access point 1, remains afloat.
• the access point is connected, by three 25 respective lines depending on the three relays, to Savoi. Lines a, b, c, to three buses A, B, C which can, thanks to switching means not shown, be connected at will to earth, to electrical sources, measuring means, etc. 30 * Management of the opening or closing of the diff rents relays RI, R2, R3 as well as devices connected to the bus lines ABC, - is carried out by automatic means, for example, using microprocessors or a calculator.
• the access point 1 is capable of being connected by a relay switch R'1 of the IxRT type on the one hand to a line c itself connected to the bus C, on the other hand to a common conductor d leading to a similar relay switch R * 2 capable of being switched alternately on lines a and b connected to buses A and B.
• the different access points are grouped in pairs.
• the first pair consists of access points 1 and 2.
• the first access point of a pair is called an odd point and the second point even by convention.
• Each access point is capable of being connected, by an assembly of three analogous switches to the assembly of figure r with three lines al, bl cl, a2, b2, c2, ..., ak, bk, ck, ak + 1, bk + 1, ck + 1 ... All lines, cl, c2 ... ck, ck + 1, .. '. , served by relay switches RI1, RI2 ... RIK, RIK + 1, ... so connected to a common bus C.
• This can advantageously be provided to be connected to earth, for example.
• the other switches are connected in the following way: the switches ri, r2, of the lines al, of the first pair of access points 1, 2 are actuated simultaneously and in synchronism by the same relay materialized on the drawing by a line mixed and referenced RI, Likewise, the switches r'1 and r'2 of the lines bl b2 are actuated by the same relay R'1,2. Similarly in the pair k, k + 1 of access points, the switches and rk + 1 correspond to a relay Rk, k + 1. We also see the switch R'k, k + 1 which corresponds to the interrupter R'1,2 of the first access pair.
• the lines at odd points are connected to a so-called odd bus referenced A
• the lines has even access points, at savo a2, ak + 1, are connected to a even bus ' Ap;
• the lines b of the odd access points are connected to an impa Bi bus and the lines b of the even points are connected to a b called even Bp.
• the bus Ai, Ap are connected by a relay 1 time RT referenced RA to a line A itself connected to control and operating means.
• bu Bi and Bp are connected by another relay 1 time RT, referenced RB to line B.
• the access points are grouped two by two so that the relay Rk, k + 1 selects the measurement channel Ai o Ap according to whether the access point is even or odd, and that the relay R'k, k + 1 selects the access routes Bi o Bp under the same conditions. So just position suitably the relay RA and the relay RB to carry out all configurations allowing in particular the control of bundles of shielded cables.
• Access points are divided into a number of access point groups. Each group of access points is linked to a relay N times RT, these relays being referenced R R2, ... Rk + 1. '.. '
• R R2 a relay N times RT
• R R2 a relay N times RT
• R'1 a second relay N times RT designated by R'1 or respectively to N lig al, a2, ... aN, forming the N lines of a channel VI. Consequently, when one of the relays R1, R2 ...
• Rk + 1 is energized in the position oriented on VI, the various corresponding access points are connected respectively to the lines al, a2, ... aN. In the other position of relay RI, R or Rk + 1 the points are sent to the second relay corresponding to R'l R * 2 ... or R'k + 1. This last relay orian every N access points either to a common bus V or to the respective lines bl, b2, ... bN of a seco of channel V2.
• Lines a a2, ..., aN of channel VI are addressed to N relay relays ri, r2 ... rN; these are 1 time RT relays.
• One of the two output lines of these relays is connected to different lines bl, b2, ..., bN of the channel V2.
• the output output is addressed to N relay 1 time RT designated by r " r "2, r" N.
• the outputs of these latter relays are addressed respectively to a terminal line B and to a terminal line C.
• One of the outputs of these relays is addressed to the terminal bus line A and the other to the output-terminal line C to which it was already connected.
• the exit route can also be advantageously connected to C.
• ba makes it possible to direct each access to its corresponding bus in one of the channels VI or V2 or to the common point but then each time in packets of N, the switch represented on the figure 6 then authorizing each bus line of channels VI or V2 to be connected to the measurement lines A, B or C while prohibiting that certain access strokes are connected simultaneously to the same measurement lig A or B.
• channel V3 instead of depending on relays R'1, R'2, ... R'k + 1, could depend, in a variant constituting a simple equivalent, on the first relays R1, R2, .. .Rk + 1, by reversing with channel VI.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Tests Of Electronic Circuits (AREA)
• Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Applications Claiming Priority (2)

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• 1984
  • 1984-03-30 FR FR8405015A patent/FR2562260A1/fr active Pending
• 1985
  • 1985-03-28 WO PCT/FR1985/000063 patent/WO1985004488A1/fr not_active Ceased
  • 1985-03-28 EP EP85901463A patent/EP0176532A1/de active Pending

Non-Patent Citations (1)

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