Source: https://patents.google.com/patent/US20150115974A1/en
Timestamp: 2020-02-17 08:01:09
Document Index: 651545085

Matched Legal Cases: ['art 2', 'art 3', 'art 2', 'art 12', 'art 3', 'art 6', 'art 7']

US20150115974A1 - Method for determining maintenance time for contacts, and testing apparatus - Google Patents
US20150115974A1
US20150115974A1 US14/528,115 US201414528115A US2015115974A1 US 20150115974 A1 US20150115974 A1 US 20150115974A1 US 201414528115 A US201414528115 A US 201414528115A US 2015115974 A1 US2015115974 A1 US 2015115974A1
US9678134B2 (en
FIG. 5 illustrates a case where a wire T1 is a target object to be subjected to the continuity test. In this case, the switching element SW1 is closed to electrically connect the upstream current feeding terminal 81, which is connected to a first end P1a of the wire T1, to the upstream side of the power supply part 2. At the same time, the switching element SW2 is closed to electrically connect the upstream voltage detecting terminal 91, which is connected to the first end P1a of the wire T1, to the upstream side of the detection part 3. On the other hand, the switching element SW4 is closed to electrically connect the downstream current feeding terminal 82, which is connected to a second end P1b of the wire T1, to the downstream side of the power supply part 2 (or the current detection part 12). At the same time, the switching element SW3 is closed to electrically connect the downstream voltage detecting terminal 92, which is connected to the second end P1b of the wire T1, to the downstream side of the detection part 3. Thus, the selection part 6 is capable of selecting the wire T to be tested, by closing and opening the switching element SW of the switch part 7.
1. A method for determining when maintenance may be required on contacts for connecting an object to be subjected to an electrical test to a testing apparatus, the method comprising:
bringing said contacts into contact with test points on the object,
supplying power to a selected test point through its corresponding contact;
detecting changes in voltage at the contact to which the power is supplied; and
issuing maintenance information indicating that the contact may be abnormal, upon detecting that said voltage does not successively rise during a predetermined time interval.
2. The method of claim 1, wherein said maintenance information is issued based on a voltage level at which said voltage does not successively rise.
3. The method of claim 1, wherein the electrical test conducted on the object is a continuity test.
4. The method of claim 1, wherein the maintenance information indicating that the contact is abnormal is issued when the voltage does not successively rise during a first voltage interval having a preset upper voltage value and during a second voltage interval ranging from said preset upper level to a higher level.
5. The method of claim 1, wherein said object is a wire on a circuit board.
6. A testing apparatus for conducting an electrical test on one or more objects and for determining when maintenance may be required on contacts that electrically connect said objects to the testing apparatus, comprising:
a power supply part configured to supply power to one or more of said contacts for conducting said electrical test on a selected object;
a detection part configured to detect a value of voltage on the selected object at said or more contacts when power is supplied; and
a determination part configured to determine that a contact may require maintenance, upon detecting that said value of voltage does not successively rise over one or more time intervals.
7. The testing apparatus of claim 6, wherein said electrical test is a continuity test.
8. The testing apparatus of claim 6, wherein said objects are wires on a circuit board.
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