摘要:
For measuring the absorption from measuring values whereby the radiation attenuation in a plane of a body is measured, a large number of calculations must be performed. When use is made of a digital computer, a large quantity of storage locations and a long calculating time are required. According to the invention, use is made of a charge storage tube wherein the correction values calculated in a preprocessing unit on the basis of the measuring values are superimposed, so that a substantial reduction of the calculation time and a reduction of the number of storage locations are realized.
摘要:
900,646. Measuring density by radiation. INDUSTRIAL NUCLEONICS CORPORATION. Oct. 14, 1958 [Dec. 12, 1957], No. 32835/58. Class 40 (3). In apparatus for measuring the density of an object such as a cigarette rod 10 by passing a beam of radiation from a radio-active source 20 through an aperture 90 in a block 60 through which the rod passes, and receiving it on a detector 30, spurious signals caused by movement of the rod upwards are eliminated by an absorbing block 50 with a reflecting top surface positioned in the radiation path. The arrangement is that if the rod lifts radiation passing beneath the rod is intercepted by the block radiation passing through the rod and reaching the detector is reduced because of the increased width of cigarette in the radiation path through region c while the radiation reflected on to the detector from top surface e is increased, maintaining the detector output substantially constant.
摘要:
A scanning method which is a method of identifying a change in the density of an object includes arranging a source of ionizing radiation and an array of radiation detectors Dn, where n is an integer from 1 to N, capable of detecting the radiation in such a way that radiation counts are counted by the detectors as the source and detectors are rotated around the object and normalized counts values are collated in a matrix such that a pattern may be detected within the matrix from which the presence of a change in the density of the object at a location lying on at least one of the radiation paths may be inferred.
摘要:
Improved method and means for the detection of nitrogenous material or assaying of nitrogenous material in an object on the basis of nuclear resonant attenuation of 9.17 MeV .gamma.-rays. A target in form of one or several .sup.13 C pellets at least 25.mu. thick, or alternatively in form of a body that bears a composite thin film including at least one .sup.13 C layer not more than 1.mu. thick and at least one other substance that is capable of generating supplementary .gamma.-radiation for determining the non-resonant component of attenuation, is bombarded with 1.75 MeV protons to produce a source of 9.17 MeV .gamma.-rays. The target is placed on one side of the inspected object and a .gamma.-ray detector or an array of such detectors is placed on the other side and the total and non-resonant attenuation are read and evaluated.
摘要:
A content tobacco amount controlling device for use with a cigarette making machine of the type including a cigarette conveyor, a tobacco trimming device, and a tobacco wrapping device. The controlling device includes first and second radio ray density detecting devices, and a first integrator connected to the second radio ray density detecting device for integrating an electric signal from the second radio ray density detecting device. An adding device is connected to the first integrator, and a second integrator is connected to the adding device for integrating an output of the adding device. The trimming device is operated in response to an output of the second integrator to control the amount of content tobacco after trimming.
摘要:
Apparatus for direct measurement of density of a core sample from a tree. A radiation source and detector with a receptacle for the core therebetween, an integrator unit for the detector output, and an indicating meter driven by the integrator unit.
摘要:
Specifically disclosed herein is a method and apparatus whereby a rod-like workpiece such as a cigarette rod is gauged by passing it between a beta radiation source and a radiation detector, and the sensitivity of the instrument to changes in the crosssectional shape of the rod is minimized by placing a ''''center blanking bar'''' made from a substantially ''''infinite absorber'''' material in the radiation beam which is incident on the rod, so as to reduce the radiation intensity passing through the center of the rod.
摘要:
Ice detection equipment comprises electrical circuit means for effecting a count of a number of electrical pulses means for modifying the count depending upon the rate of production of the pulses.