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Operating circuit and method of operation for a transducer

A technique for operating circuits, transducers, applied to fluids that utilize vibrations, instruments, utilizing re-radiation, etc.

Active Publication Date: 2021-11-16
ELMOS SEMICON SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] figure 1 A disadvantage of the circuit is that the maximum magnitude of the operating voltage of the transducer at the transducer positive terminal TR+ and transducer negative terminal TR- is limited to the operating voltage V bat twice the voltage value of

Method used

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  • Operating circuit and method of operation for a transducer
  • Operating circuit and method of operation for a transducer
  • Operating circuit and method of operation for a transducer

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Embodiment Construction

[0050] Figure 4 The voltage between the positive terminal TR+ of the transducer TR and the negative terminal TR- of the transducer TR of an ultrasound transducer of the prior art is shown during a so-called Burst-Pulse curve. It can be clearly seen (how) the driving phase of the excitation of the transducer TR with a square wave signal and the subsequent decay.

[0051] Figure 5 shown with Figure 4 The circuit is the same as the circuit for the attenuation of the transducer TR, but they differ in that, according to figure 1 and image 3 The difference between the output inductance L DRV is connected to the power supply line of the transducer TR, and the output inductance L DRV The value of is determined such that by the series capacitance C of the transducer TR TRs and series inductance L TRs The series resonant circuit constituted by the output inductance L of the transducer TR DRV , Transducer capacitance C TR and parallel capacitor C TRp The coupling between t...

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Abstract

The invention relates to a transformerless operating circuit for driving a transducer (TR) and a corresponding operating method, wherein the operating circuit has a capacitive energy store (C TR ) and inductive energy storage (L DRV ).

Description

technical field [0001] The invention relates to a transformerless operating circuit for an ultrasound transducer (TR). Background technique [0002] Sensor systems for detecting environmental conditions are especially important in the development of driver assistance systems for autonomous driving. Ultrasonic sensors are already being used today to build so-called maps of the environment. A problem that often arises is the desire to maximize operating range while keeping costs low. In the past, transformers were used to drive piezoelectric oscillators of ultrasound transducers. However, such a transformer should be omitted for cost reasons. Therefore, in the prior art, the voltage amplitude of the transducer oscillations at the transducer terminals is limited to twice the operating voltage. Wherein, here, the operating voltage is understood by outputting the power supply of the driving stage. Furthermore, the operating voltage can considerably exceed the voltage applied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/02G01S15/931
CPCB06B1/0215B06B1/0207B06B2201/55G01S7/524G01S15/931
Inventor 弗里曼·乌韦卡普尔·尼龙
Owner ELMOS SEMICON SE
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