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System for determining sonic velocity in solid materials

阅读:287发布:2024-02-11

专利汇可以提供System for determining sonic velocity in solid materials专利检索,专利查询,专利分析的服务。并且System for determining the sonic velocity and related characteristics of a sample of solid material such as malleable or ductile iron. A portable hand-carried unit has means engagable with opposite surface portions of a sample, sensing means for developing an electrical characteristic which varies as a function of the distance between the engagement means and ultrasonic transducer means for transmitting waves through the sample from one surface portion to the other and back again. The variable electrical characteristic and the time of transmission of the waves through the sample are compared by electrical measuring means.,下面是System for determining sonic velocity in solid materials专利的具体信息内容。

1. In a system for determining characteristics of a sample of solid material, first and second support means, first and second engagement means on said first and second support means, connection means connecting said first and second support means for movement relative to each other and to move said first and second engagement means toward each other and into engagement with opposite surface portions of a sample, ultrasonic transducer means carried by at Least one of said support means for transmitting a burst of ultrasonic energy into one of said surface portions and for developing a received signal after transmission of said burst from said one of said surface portions to the other of said surface portions, delay means operated in timed relation to the transmission of said bursts to develop an output signal after a controllable time delay, means for sensing relative movement of said first and second support means and connected to said delay means to control said controllable time delay in proportion to the distance between said first and second engagement means, and comparison means for determining coincidence between said output signal from said delay means and said received signal from said transducer means.
2. In a system as defined in claim 1, adjustment means associated with said delay means for controlling the ratio between said controllable time delay and the distance between said first and second engagement means.
3. In a system as defined in claim 1, said connection means comprising means supporting said second support means on said first support means for rectilinear movement relative thereto, and said sensing means comprising a resistance element carried be one of said support means and a slider contact carried by the other of said support means and movable along said resistance element in response to relative rectilinear movement of said second support means on said first support means.
4. In a system as defined in claim 3, said first support means being adapted to be held in one hand to position said engagement means on opposite sides of a sample, and spring means acting between said first and second support means to urge said second engagement means toward said first engagement means and to engage said engagement means with said opposite surface portions of the sample.
5. In a system as defined in claim 1, said comparison means comprising an oscilloscope having a pair of deflection means, sweep circuit means connected to one of said deflection means and operated in synchronism with the transmission of bursts into the sample, and means for applying received signals from said transducer means and output signals from said delay means to the other of said deflection means.
6. In a system as defined in claim 1, said comparison means comprising a coincidence gate circuit responsive to said output signal from said delay means and said received signal from said transducer means.
7. In a system as defined in claim 1, said delay means comprising a first circuit for developing a trigger signal after a controllable time delay, and a second circuit responsive to said trigger signal to develop an output signal in the form of a pulse having a predetermined time duration.
8. In a system as defined in claim 1, said transducer means comprising a sending-receiving transducer forming one of said engagement means and arranged to transmit bursts into the sample and to develop said received signal after reflection of said bursts from the surface portion engaged by the other of said engagement means.
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