Poling process for linear piezoelectric strain transducers专利检索-压电效应电磁学专利检索查询-专利查询网

Poling process for linear piezoelectric strain transducers

阅读：246发布：2022-03-07

专利汇可以提供Poling process for linear piezoelectric strain transducers专利检索，专利查询，专利分析的服务。并且A process for producing sufficient piezoelectric effect in plastic dielectric coaxial cable to obtain a highly sensitive linear strain transducer. The process combines a selected soak temperature profile with the application of high voltage DC to maximize sensitivity and uniformity. The plastic dielectric material exhibits a high level of piezoelectric activity when processed according to the invention so that, for example, the cable is sensitive to the passage of humans or vehicles when buried in the ground.，下面是Poling process for linear piezoelectric strain transducers专利的具体信息内容。

权利要求

1. A method of poling manufactured coaxial cable having a plastic dielectric material disposed intermediate the inner conductor and the outer shield conductor of the cable to produce a linear piezoelectric transducer comprising the steps of: padding the barrel portion of a poling drum; loosely winding a length of the manufactured coaxial cable around said padded barrel portion of said drum; dressing the outer end of said cable to obtain a minimum of a 1 inch air gap between tHe inner conductor and the outer shield conductor of said cable; placing said drum holding said cable in a temperature chamber; connecting a source of high voltage to the dressed end of said cable between the inner conductor and the outer shield conductor of said cable; heating said chamber and said cable to an elevated temperature; cooling said chamber and said cable; disconnecting said source of high voltage; and aging said cable to overcome its high initial piezoelectric sensitivity which decays exponentially.

2. The method of claim 1 wherein: said source of high voltage has a potential of substantially 10, 000 volts DC.

3. The method of claim 1 wherein: said cable has a polyethylene dielectric, and said chamber is heated to a temperature in excess of 180* F.

4. The method of claim 3 wherein: said chamber is heated to substantially 200* F.

5. The method of claim 3 wherein: said chamber is held at said elevated temperature for substantially 7 hours.

6. The method of claim 5 wherein: said chamber is cooled to room temperature over a period of substantially 16 hours.

7. The method of claim 5 wherein: said chamber is cooled at an initial rate not in excess of 5* F per hour.

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Poling process for linear piezoelectric strain transducers

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