超声波.超声波测量用水调节

[中文适用范围]： 本技术报告描述了用于超声测量的水的脱气方法，以降低用于超声测量的水的离子含量，降低用于超声测量的水的生物含量，减少用于超声测量的水的悬浮颗粒含量。本技术报告适用于所有以水为传输介质的超声场测量。用于辐射力平衡（RFB）的水的质量和处理方法可能与基于水听器的声学测量所需的不同。基于化学的水处理方法（如杀藻剂）可能适用于这些应用。然而，在本文件中，化学方法被提及但不鼓励用于声压/强度测量。 [外文原描述]： IEC/TR 62781:2012(E), which is a technical report, is applicable to all measurements of ultrasonic fields where water is the transmission medium. Water provides an inexpensive and readily available medium with characteristic acoustic impedance comparable to biological tissue. However, basic tap water is far from optimum for ultrasonic measurement as it contains many dissolved, absorbed and suspended contaminants. Measurements can be affected in many ways by these impurities. This technical aims to provide a unified source to establish a water treatment process for ultrasonic measurements. The quality and treatment methods for water used within a radiation force balance (RFB) may be different from that required for hydrophone based acoustic measurements. Chemical based methods of water treatment (e.g. algaecides) may be appropriate for these applications. However, in this document, chemical means are noted but appropriately discouraged for acoustic pressure/intensity measurements. This Technical Report describes methods for: - degassing water to be used in ultrasonic measurements; - to decrease the ionic content of water to be used in ultrasonic measurements; - to decrease the biological content of water to be used in ultrasonic measurements; and - to reduce the suspended particulate content of water to be used in ultrasonic measurements.