公开(公告)号：US5311764A

公开(公告)日：1994-05-17

申请号：US94662

申请日：1993-07-19

申请人： Anthony Smith ,  Dan Goff ,  Roman Kruchowy ,  Carl Rhoads

发明人： Anthony Smith ,  Dan Goff ,  Roman Kruchowy ,  Carl Rhoads

IPC分类号： G01M7/08 ,  G01N3/00 ,  G01N3/02 ,  G01N3/52 ,  G01N33/38 ,  G01L5/00

CPC分类号： G01N3/52 ,  G01M7/08 ,  G01N2203/0085 ,  G01N2203/021 ,  G01N33/383

摘要： A measuring apparatus which detects defects in underwater concrete structs by measuring the compressive strength of the structure. The measuring apparatus comprises a rebound hammer which has extending from the nose thereof a plunger. The plunger is pressed against the structure whose compressive strength is being measured forcing the plunger into the rebound hammer's housing which releases a spring driven mass. A resistive film strip which is in electrical contact with the mass detects the maximum rebound of the mass and provides an electrical signal indicative of this maximum rebound. A data acquisition and processing circuit comprising a microprocessor and signal conditioning electronics receives, processes and stores the electrical signals provided by the resistive strip. This circuit includes a peak detection circuit which captures the peak output signal from the resistive strip. The peak detection circuit then interrupts the microprocessor and sends an analog signal proportional to the maximum rebound of the mass to an analog to digital converter which converts the analog signal to a digital data for processing by the microprocessor. The microprocessor then calculates the compressive strength of the underwater concrete structure under test.

摘要翻译： 一种通过测量结构的抗压强度来检测水下混凝土结构中的缺陷的测量装置。 测量装置包括从其鼻部延伸的柱塞的回弹锤。 柱塞被压靠在其抗压强度被测量的结构上，迫使柱塞进入回弹锤的外壳，释放弹簧驱动的质量。 与质量电接触的电阻膜条检测到质量的最大反弹并提供指示该最大回弹的电信号。 包括微处理器和信号调理电路的数据采集和处理电路接收，处理和存储由电阻带提供的电信号。 该电路包括峰值检测电路，其捕获来自电阻条的峰值输出信号。 然后，峰值检测电路中断微处理器，并将与质量最大回弹成比例的模拟信号发送到模拟数字转换器，模数转换器将模拟信号转换为数字数据，以供微处理器处理。 然后微处理器计算被测水下混凝土结构的抗压强度。

公开(公告)号：US3937797A

公开(公告)日：1976-02-10

申请号：US475910

申请日：1974-06-03

申请人： Andrzej Antoni Florian Romanski ,  Derek John Brookes ,  Anthony Smith ,  Harry Markham

发明人： Andrzej Antoni Florian Romanski ,  Derek John Brookes ,  Anthony Smith ,  Harry Markham

IPC分类号： C04B35/46 ,  B01J21/06 ,  B01J37/00 ,  B01J37/08 ,  C01G23/047 ,  C07C51/265 ,  B01J9/02 ,  B01J35/02 ,  C01G23/04 ,  C22B34/00

CPC分类号： B01J21/063 ,  B01J37/0018 ,  B01J37/08 ,  C01G23/047 ,  C07C51/265 ,  C01P2006/21

摘要： Method of hardening powdered titania (titanium dioxide) so as to make it attrition-resistant and to enhance its properties as a catalyst carrier. The method involves thoroughly dispersing powdered titanium dioxide in water, removing the excess water, drying and then calcining the product at a temperature between 650.degree.C and 900.degree.C. Preferably a large excess of water is used, at least 37% to effect dispersion; and dispersion may be aided by use of a surfactant, a water soluble organic compound or a highly polar inorganic compound. The excess water may be removed by filtration or the use of flocculants.The resultant powdered material is particularly useful as a carrier for oxidising ortho-xylene to phthalic anhydride.