Novel acoustic power meter

Abstract

The invention relates to the technical field of radiation force balance systems, in particular to a novel acoustic power meter. The novel acoustic power meter comprises a frame, an acoustic power meter calibration system and a water circulation and oxygen content monitoring system are arranged in the frame, and wheels and a brake baffle are arranged at the bottom of the frame. The novel acoustic power meter further comprises an ultrasonic transducer, the acoustic power meter calibration system comprises an absorption target, and the ultrasonic transducer is located below or above the absorption target. The device is convenient to move, and can be used for degassing the water in the water tank, and the oxygen content in the water can be monitored in real time; in addition, the position of the absorption target can be adjusted more accurately.

Description

technical field [0001] The present invention relates to the technical field of radiation force balance system, and more specifically, relates to a novel sound power meter. Background technique [0002] The structure of the existing radiation force balance system is relatively heavy and has no mobile auxiliary device, which is not conducive to the frequent movement of the equipment; since the absorption target and the transducer need to be immersed in water during the measurement process, it is necessary to check the water content in the water tank. Oxygen content and water temperature have certain requirements, but at present, degassed water can only be added to the water tank after being prepared in the laboratory, and the oxygen content in the water tank cannot be monitored, which is easy to introduce large deviation; when leveling the absorbing target, currently only through visual inspection, which is prone to large errors; when the existing system is applicable to the s...

AI Technical Summary

Problems solved by technology

[0002] The structure of the existing radiation force balance system is relatively heavy and has no mobile auxiliary device, which is not conducive to the frequent movement of the equipment; since the absorption target and the transducer need to be immersed in water during the measurement process, it is necessary to check the water content in the water tank. Oxygen content and water temperature have certain requirements, but at present, degassed water can only be added to the water tank after being prepared in the laboratory, and the oxygen content in the water tank cannot be monitored, which is easy to introduce large deviation; when leveling the absorbing target, currently only through visual inspection, which is prone to large errors; when the existing system is applicable to the situation where the transducer emits ultrasound from the bottom to the top, the used The absorption target is easy to drift and unstable, and it is easy to cause large deviations in the measurement results; at the same time, the water tanks suitable for the situation where the transducer emits ultrasound from the top to the bottom of the current system are mainly hollowed out, which cannot be widely used In the actual measurement process, in order to make the measurement results as accurate as possible, it is necessary to make the absorption target and the center of the transducer coaxial as much as possible, but for the current system, only by visual inspection This will introduce a large error; and in order to protect the absorbing target and make the measurement results more accurate at the same time, it is necessary to make the distance between the absorbing target and the transducer about 0.7f (f is the focal length), and the current As far as the system is concerned, it can only be estimated by visual inspection, and there will also be some errors

To sum up, there are many problems in the current radiation force balance system, which cannot be well and widely applied to different actual situations. Therefore, many improvements need to be made to adapt to different measurement environments and situations

[0003] Therefore, the disadvantages of the prior art are summarized as follows: the whole system is bulky and has no mobile auxiliary device, so it is not conducive to the frequent movement of equipment; the current system has no water circulation system and oxygen content detection device, and for the required degassed water, it is necessary to add additional equipment from the experiment. room preparation, and it is impossible to monitor the oxygen content in the water tank, which increases a large error; when the existing system is suitable for the situation where the transducer emits ultrasound from the bottom to the top, the absorption target used is prone to drift and instability, which is easy to It will cause large deviations to the measurement results; at present, there is no leveling device for the absorption target, and it can only be evaluated by visual inspection, which is prone to large errors; the existing system is equipped with a transducer suitable for emitting ultrasound from top to bottom The water tank in the environment is mainly hollowed out, which cannot be widely applied to the situation of different ultrasonic transducers; the existing system has no absorption target and transducer center alignment auxiliary device, and can only be evaluated by visual inspection, and the deviation is large. large; the existing system has no clear distance measuring device, and the distance between the absorbing target and the transducer can only be estimated visually, and the deviation is relatively large; the balance in the existing system is fixed, which makes the absorption The adjustment range of the target is also relatively small, limited to fine-tuning in the up and down directions, making the entire measurement system relatively fixed, inflexible, and unfriendly to use

[0004] For example, Chinese patent CN2015202428150 discloses an acoustic power measurement device for underwater acoustic focusing transducers, which causes large deviations in measurement results.

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