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1. 发明申请

WO1990014738A1 ULTRASONIC PROBE AND METHOD OF PRODUCING THE SAME 审中-公开
标题翻译：超声波探头及其制造方法
公开(公告)号：WO1990014738A1
公开(公告)日：1990-11-29
申请号：PCT/JP1990000605
申请日：1990-05-14
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HITACHI, LTD. , HORINO, Masaya , KOUNO, Akiomi , SASAKI, Souji , ARIMA, Yukio
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HITACHI, LTD.
IPC分类号： H04R17/00
CPC分类号： B06B1/0681 , G10K11/02
摘要： An ultrasonic probe characterized in that the junction surfaces of a piezo-electric element and an ultrasonic wave absorbing material are irradiated with corpuscular rays in a vacuum and are then press-adhered together. Therefore, the highly precise junction is accomplished without being exposed to high temperatures, and undesired reflection on the junction surfaces is prevented and reverberation is efficiently absorbed.

2. 发明申请

WO1990002945A1 ULTRASONIC WAVE INSPECTING APPARATUS 审中-公开
标题翻译：超声波检测装置
公开(公告)号：WO1990002945A1
公开(公告)日：1990-03-22
申请号：PCT/JP1989000913
申请日：1989-09-05
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TAKISHITA, Yoshihiko , SASAKI, Souji
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： G01N29/04
CPC分类号： G10K11/345 , G01N29/262
摘要： An ultrasonic wave inspecting apparatus in which a number of array vibrators (101 to 10128) are arranged in a column, the plurality of array vibrators are successively excited to scan a sample with the ultrasonic waves, and the reflected waves are analyzed in order to inspect the surface condition and internal defects of the sample. The array vibrators are grouped into a plurality of sections (K1, K2, K3, K4) by a section select means, the sections are so selected as will be overlapped on the neighboring portions (K12, K23, K34) so that the ultrasonic scaning will not be lost between the neighboring sections. Further, the array vibrators on the overlapping portions are switched by a switch means to pertain to one section at some moment and to pertain to the other section at other moments, in order to carry out the ultrasonic wave scanning. The ultrasonic wave scanning is carried out by, first, simultaneously exciting the array vibrators (101 to 108), (1033 to 1040), (1065 to 1072), (1097 to 10104) to emit four ultrasonic wave beams (B1), (B33), (B65), (B97) such that the reflected waves will be incident on the array vibrators that are excited. Then, excitation of the array vibrators is shifted to a position deviated by one pitch, and the scanning is successively effected in the direction of arrow. This makes it possible to quickly carry out the ultrasonic wave scanning.

3. 发明申请

WO1991002247A1 ULTRASONIC INSPECTION APPARATUS 审中-公开
标题翻译：超声波检查装置
公开(公告)号：WO1991002247A1
公开(公告)日：1991-02-21
申请号：PCT/JP1990000754
申请日：1990-06-08
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TAKISHITA, Yoshihiko , SASAKI, Souji
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： G01N29/22
CPC分类号： G01N29/30 , G01N29/22 , G01N29/262 , G01N2291/044 , G01N2291/106 , G10K11/345
摘要： An ultrasonic inspection apparatus comprising a large number of array oscillators (101 ∩ 10n) in a columnar shape. The oscillators are excited sequentially to generate a sequence of ultrasonic beams to scan an object of inspection. The reflection from the object is analyzed to inspect the surface condition of the object and the existence of any fault inside it. Before an inspection, ultrasonic scanning of a reference material having a uniform quality and free from any defects is performed in order to collect the reference data for each ultrasonic beam (each channel). Correction values are prepared on the basis of these reference data and the reception signals obtained by the ultrasonic scanning of the object are corrected by use of these correction values. One correction means determines the ratio of the mean value of the reference value to the reference value of the channel for each channel, multiplies the reception signal of the same channel by the ratio as the correction value and uses the product as the data to be displayed on a display unit (21). Another correction means determines a damping ratio to the reference value of each channel so that the reference value of each channel becomes a minimum value or a predetermined value below the minimum value, and the reception signal of the same channel is damped by a sensitivity leveling circuit (31) using the damping ratio. Variance of sensitivity between the channels can be eliminated by these correction means.

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