CN2394209Y

CN2394209Y - Large range ultrasonic power tester

Info

Publication number: CN2394209Y
Application number: CN 99240162
Authority: CN
Inventors: 陈亚珠; 高爽
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 1999-11-03
Filing date: 1999-11-03
Publication date: 2000-08-30
Anticipated expiration: 2009-11-03

Abstract

The utility model relates to a large-measuring range ultrasonic power measuring device, which adopts a separable structure that a float and a tray are magnetically combined. The upper edge of the float, and the lower surface of an acoustic target are tightly combined; the tray is fixed on a cantilever beam type load-weight sensor; the cantilever beam type load-weight sensor is horizontally fixed on an upright support post of a bottom seat; the float and the tray are magnetically combined by two groups of upper and lower magnets. The utility model realizes the enlargement of the measuring range, and can be suitable for measuring the middle ultrasonic power and the large ultrasonic power which are radiated by a large-aperture ultrasonic transducer or an ultrasonic transducer array.

Description

The wide range ultrasonic power measuring device

The utility model relates to a kind of ultrasonic power measuring device, relates in particular to a kind of wide range ultrasonic power measuring device, belongs to the acoustic measurement technical field.

In the prior art; float and sensor in the strain-type ultrasonic power meter all link together; since must consider stable, effectively utilize the measurement range of sensor and to the protection of sensor; sound target surface area can not be done very greatly; thereby range is less than normal, be not suitable for measuring heavy caliber ultrasonic transducer or the radiation of ultrasound transducer array institute in, big ultrasonic power.

The purpose of this utility model is to provide a kind of ultrasonic power measuring device of new structure, makes it to enlarge the range of ultrasonic power meter, be fit to measure heavy caliber ultrasonic transducer or the radiation of ultrasound transducer array institute in, big ultrasonic power.

For realizing such purpose, the detachable structure that the utility model adopts float to combine with pallet magnetic force is installed and mainly is made up of sound target, float, pallet, magnet, load sensor and base etc.Wherein, the hollow inverted cone of sound target for adopting copper or stainless steel to make, upper surface is electroplated polishing; The column type hollow and thin-walled housing of float for adopting duralumin, hard alumin ium alloy to make, its upper limb is combined closely with the lower surface of sound target; Pallet is the circular flat disk that duralumin, hard alumin ium alloy is made, and is fixed on the beam type load sensor by vertical support, and load sensor is horizontally fixed on the vertical support of base; Be fixed with one group of magnet on the inner bottom surface of float, on the lower surface of pallet, also be fixed with one group of magnet, have at least one group to be permanent magnet in two groups of corresponding magnets.

When measuring ultrasonic power, the tank water placing flat, wedge absorber is equipped with in its inwall and bottom, fills with carbonated drink in tank, and base is placed on the bottom surface of tank, then float is placed on the pallet, and accurate sound target is faced in the acoustic emission of tested ultrasonic transducer.Like this, the ultrasonic transducer ultrasonic waves transmitted has formed radiation pressure at the upper surface of sound target, this pressure passes to load sensor, and load sensor is converted to pressure electric signal and is delivered to Circuits System, and Circuits System can get ultrasonic power after this signal is handled.

In order to improve measuring accuracy and resolution, the utility model has adopted high precision journey load sensor in a small amount.In order to realize large range measuring, following requirement is arranged: 1,, during measurement, require to utilize the buoyancy of float to come the weight of balance pallet and the deadweight of load sensor in order effectively to utilize range; 2, in order to protect load sensor, after the measurement, require sound target and float are taken away from pallet; 3, in order to obtain wide range, the surface of requirement sound target is bigger, and weight increases thus, thereby requirement sound target and float have bigger internal cavities, with buoyant equilibrium weight, but produce the unbalanced of buoyancy point thus and the sound target that causes tilts and overturning, the i.e. instability of system.In order to satisfy above-mentioned requirements, it is detachable that the utility model adopts float and pallet to make on structural design, utilizes the magnetic force of two groups of magnets that float and trays are in the same place.

For understanding technical solution of the present utility model better, be further described below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model.

As shown in the figure, ultrasonic power measuring device comprises target 1, float 2, pallet 4, one group of upper magnet 3 and one group of composition such as lower magnet 5, load sensor 6 and base 7, sound target 1 is the hollow inverted cone, float 2 is a column type hollow and thin-walled housing, and the upper limb of float 2 is combined closely with the lower surface of sound target 1.Pallet 4 is a circular flat disk, is fixed on the beam type load sensor 6 by vertical support, and load sensor 6 is horizontally fixed on the vertical support of base 7.One group of upper magnet 3 is fixed on the inner bottom surface of float 2, and one group of lower magnet 5 is fixed on the lower surface of pallet 4.

When measuring ultrasonic power, tank 8 horizontal positioned, wedge absorber 9 is equipped with in its inwall and bottom, in tank, fill with carbonated drink 10, base 7 is placed on the bottom surface of tank 8, then float 2 is placed on the pallet 4, and accurate sound target 1 is faced in the acoustic emission of tested ultrasonic transducer 11.Like this, ultrasonic transducer 11 ultrasonic waves transmitted pass to load sensor 6 at the radiation pressure of the upper surface formation of sound target 1, load sensor 6 is converted to pressure electric signal and is delivered to Circuits System, and Circuits System can get ultrasonic power after this signal is handled.

Compared with prior art, the utility model has been realized the expansion of range, and it is ultrasonic to be fit to measure heavy caliber In transducer or the radiation of ultrasound transducer array institute, big ultrasonic power. In addition, with electronic technology and software skill Art combines, and adopts structure of the present utility model, also for the intelligent of ultrasonic power meter and simplify the operation and provide Necessary basis.

Claims

1, a kind of wide range ultrasonic power measuring device, comprise target 1, float 2, pallet 4 and sensor 6 etc., it is characterized in that the detachable structure that float 2 and pallet 4 adopt magnetic force to combine, sound target 1 is the hollow inverted cone, float 2 is a column type hollow and thin-walled housing, the upper limb of float 2 is combined closely with the lower surface of sound target 1, pallet 4 is a circular flat disk, be fixed on the beam type load sensor 6 by vertical support, load sensor 6 is horizontally fixed on the vertical support of base 7, one group of upper magnet 3 is fixed on the inner bottom surface of float 2, and one group of lower magnet 5 is fixed on the lower surface of pallet 4.

2, a kind of as having at least one group to be permanent magnet in said two groups of corresponding upper magnets 3 of claim 1 and the lower magnet 5.