Leakage field flaw detector with current energization with means to control current energization by probe scan专利检索-电流测量探头传感器与探测器专利检索查询-专利查询网

Leakage field flaw detector with current energization with means to control current energization by probe scan

阅读：136发布：2022-05-12

专利汇可以提供Leakage field flaw detector with current energization with means to control current energization by probe scan专利检索，专利查询，专利分析的服务。并且A nondestructive testing apparatus and method are disclosed herein for testing objects by measuring the stray magnetic flux field adjacent the surface thereof. The workpiece is magnetized by means of a pulsed electric current circulating therethrough during a portion of the test interval whereby the magnetizing is accomplished with a minimum amount of power. The amount of magnetizing power required is further reduced by recording the stray fields on a magnetic medium such as a flexible tape and subsequently scanning the tape with a suitable magnetic pickup probe.，下面是Leakage field flaw detector with current energization with means to control current energization by probe scan专利的具体信息内容。

权利要求

1. A nondestructive testing system for inspecting a workpiece, said system including the combination of transport means for continuously carrying said workpiece through a test position, means for circulating an electrical test current through a test segment of the workpiece as it is being carried through the test position, a current source coupled to said means for supplying said test current whereby said test current circulates through said test segment and produces a stray magnetic field adjacent the surface of the test segment, magnetic recording means adapted to continuously engage the exterior surface of said test segment as it is carried through the test position and record stray magnetic fields thereon, a pickup probe positioned to intermittently scan the magnetic recording means and produce corresponding electrical signals, output means coupled to the pickup probe and responsive to said signals to indicate the characteristics of the workpiece, and control means responsive to the probe scanning said recording means, said control means being effective to disable the current source and enable the output means during the intervals when the probe is scanning the recording means, said control means being effective to disable the output means and enable the current source during at least a portion of the intervals when the pickup probe is not scanning the recording means.

2. The combination of claim 1 including means in the current source effective to supply a test current which includes a series of unipolar pulses.

3. A nondestructive testing system for inspecting a workpiece, said system including the combination of an inspection station, a conveyor for transporting said workpieces through the inspection station, means in said station for circulating a test current through a test segment, a current source coupled to said means for supplying said test current, said current being effective to produce stray magnetic fields adjacent the surface of the test segment, an endless magnetic belt having a section thereof In engagement with the surface of the test segment for recording the stray field thereon, a rotating turntable adjacent the endless magnetic belt, a pickup probe mounted on said turntable and positioned to scan across said belt as said turntable rotates, said pickup probe being responsive to the recorded stray fields and effective to produce electrical signals corresponding to the recordings, and control means responsive to the rotation of said turntable and effective to disable the current source during the intervals when the probe is scanning the belt.

4. The combination of a workpiece transport, electrical contacts positioned to electrically contact a workpiece on said transport, a current source coupled to said contacts, pickup means positioned to intermittently scan the workpiece, and means responsive to the position of the pickup means, said last means being coupled to said current source to disable the current source during the intervals the pickup means is scanning and enabling the current source during the intervals when the pickup means is not scanning.

5. The combination of a current source for supplying a test current, a pair of contacts coupled to the current source, said contacts being positioned to engage a workpiece and circulate a test current therethrough, magnetic recording means positioned to engage the workpiece, a pickup probe positioned to intermittently scan the magnetic recording means, output means coupled to the pickup probe, and control means responsive to the position of said probe and effective to disable and enable the current source.

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Leakage field flaw detector with current energization with means to control current energization by probe scan

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