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41. 发明专利

JPH08193939A DENSITOMETER FOR FLUID 失效
公开(公告)号：JPH08193939A
公开(公告)日：1996-07-30
申请号：JP27847791
申请日：1991-09-30
申请人： SHIROKI CORP
发明人： TAMAKOSHI HIROSHI , NONOYAMA JOJI
IPC分类号： G01N21/41 , G01N9/24
摘要： PURPOSE: To take an accurate measurement even when the radiation light diverges or only a small quantity of sample liquid is provided by employing a transparent member having curved border face and setting an incident angle to be the same. CONSTITUTION: A prism 24 having a curved inspection surface 24a touching a liquid to be measured is fitted in a prism fitting part 13, i.e., the central part of a recess 14 made in the upper surface of a body 12. A light emitting diode 20 (photosensor 21) is fitted in a hole 18 (19) made through the fitting part 13 at the inclining side face part thereof. The light emitting diode 20 is positioned such that the center line of a luminous flux incident to the surface 24a makes a maximum critical incident angle (m) determined by the refractive index of liquid present on the prism 24 and the surface 24a. The sensor 21 is located at the point where the reflected luminous flux is condensed. The diode 20 is driven such that the majority of radially diverging luminous flux incident to the border surface and reflected thereon is condensed at the light receiving part of the sensor 21. With such arrangement, even a quite small quantity of liquid can be measured using a radially diverges luminous flux.

42. 发明专利

JPH08145883A LIGHT BEAM TYPE GAS CONCENTRATION MEASURING DEVICE 失效
公开(公告)号：JPH08145883A
公开(公告)日：1996-06-07
申请号：JP30991794
申请日：1994-11-18
申请人： RIKEN KEIKI KK , SHIMIZU CONSTRUCTION CO LTD
发明人： NAKAYAMA MASAWAKE , MIYAZAWA KAZUO
IPC分类号： G01N21/3504 , G01N9/00 , G01N9/24 , G01N21/35 , G01N21/59
摘要： PURPOSE: To easily change a spot diameter of beam of a light emitting means housed in a body from outside. CONSTITUTION: Relating to a light beam type gas concentration measuring device body, an infrared light source 10 which makes an self-regressive reflecting plate, through a collimator lens 11 at the center, irradiated with the light beam from an aperture 4, and a measuring beam sensor 15 which detects incident light from the periphery of the collimator lens 11 through a paraboric mirror 12 are housed in a body 3 on one side of which an aperture 4 sealed with a transmissive board material is formed. A correcting lens 21 which changes focal distance of the collimator lens 11 is fixed, while detachable by a correcting lens rim 22, on the body 3, so that, a spot diameter of infrared ray beam is changed.

43. 发明专利

JPH0882606A MICROWAVE CONCENTRATION SENSOR 失效
公开(公告)号：JPH0882606A
公开(公告)日：1996-03-26
申请号：JP21725194
申请日：1994-09-12
申请人： TOSHIBA CORP
发明人： YAMAGUCHI SEIJI
IPC分类号： G01N9/24 , G01N22/00
摘要： PURPOSE: To obtain a concentration of a fluid irrespective of influences by a suspended matter and air bubbles, by comparing each apparent phase delay at a time point and a next time point with an upper range and a lower range of a phase angle, obtaining a revolution number, processing the revolution number thereby to obtain a true phase delay. CONSTITUTION: A phase difference-measuring circuit 35 compares a microwave transmitted wave and a microwave received wave, measures a reference phase delay θ1 to a reference fluid, and stores the delay in a phase difference- correcting circuit, 36. Thereafter, the circuit, 35 inputs in the circuit 36 an apparent phase delay θ2 ' for a fluid to be measured, e.g. every 5 seconds. The circuit 36 compares each phase delay θ2 ' at a time point and a next time point with a preset upper range of a phase angle close to 360 and a preset. lower range of the phase angle close to 0, thereby to obtain a revolution number (n). Tame circuit 36 operates θ2 =θ2 '+n×360 and obtains a true phase delay θ2 . A phase difference Δθ=θ2 -θ1 is calculated, which is inputted to a signal- converting circuit 38. A concentration is calculated in this manner.

44. 发明专利

JPH0820353B2 失效
公开(公告)号：JPH0820353B2
公开(公告)日：1996-03-04
申请号：JP28025188
申请日：1988-11-05
IPC分类号： G01F13/00 , A01J11/00 , G01F1/00 , G01F1/52 , G01F11/00 , G01F23/00 , G01G9/00 , G01G17/04 , G01N9/00 , G01N9/24 , G01N9/36

45. 发明专利

JPH0843303A CONCENTRATION MEASURING DEVICE 失效
公开(公告)号：JPH0843303A
公开(公告)日：1996-02-16
申请号：JP14777195
申请日：1995-06-14
申请人： MODERN CONTROLS INC
发明人： UIRIAMU ENU MEIYAA
IPC分类号： G01N21/35 , G01N9/00 , G01N9/24 , G01N15/08 , G01N21/31
摘要： PURPOSE: To perform a precise and linear transmissivity measurement in low level by providing such a constitution as controlling the noise component of an emitted light signal. CONSTITUTION: The emitted light of an infrared light source 62 is passed through an absorbing cell 52 and received by a photoelectric cell 66, in which an electric signal is then generated and transmitted to an amplifier 68 and a gain circuit 69. Namely, an inputted emitted light signal A is amplified and filtered to generate a signal B. This signal is rectified to generate a DC signal C, which is further filtered to generate a constant DC voltage level signal D. A relative DC voltage V shows the emitted light received by a cell 66, and thus steam concentration in the cell 52. The signal A from the cell 66 is a composite signal containing various components. As these components, emitted light from the light source 62, transmissivities of optical parts, or a window and an interference filter, influence of heating of a metal block, reflection within a chamber, and vibration of a bellow are included. The bellows generates a compressed energy fluctuation in the cell 52.

46. 发明专利

JPH07109400B2 失效
公开(公告)号：JPH07109400B2
公开(公告)日：1995-11-22
申请号：JP2910491
申请日：1991-01-31
IPC分类号： C21B7/24 , G01B15/02 , G01N9/24

47. 发明专利

JPH0765461B2 失效
公开(公告)号：JPH0765461B2
公开(公告)日：1995-07-19
申请号：JP2794990
申请日：1990-02-07
IPC分类号： E21D9/06 , G01N9/24

48. 发明专利

JPH07140120A METHOD AND APPARATUS FOR DETECTING CONCENTRATION OF MOTHER LIQUID IN SALT MANUFACTURING PROCESS 失效
公开(公告)号：JPH07140120A
公开(公告)日：1995-06-02
申请号：JP28685193
申请日：1993-11-16
申请人： JAPAN TOBACCO INC
发明人： OTAKA TAKASHI , HASEGAWA MASAMI , SHIMIZU YOSHIAKI , KAWADA YOSHIO
IPC分类号： G01N29/00 , G01N9/24 , G01N33/02 , G01N29/18
摘要： PURPOSE:To realize in-line concentration control of a mother liquid in salt manufacturing process under high temperature. CONSTITUTION:A discharge pipe (a) from a crystallizer 30 in salt manufacturing process is provided with a sampling pipe (b). The sampling pipe (b) is coupled with the measuring cell part 2A of an ultrasonic densitometer 2 through a sampling pump 1. A controller 2B controls the sampling pump 1 to sample the mother liquid from the sampling pipe (b) into the measuring cell part 2A where the ultrasonic propagation velocity of the mother liquid is measured. The controller 2B then controls a discharge valve 30d based on the ultrasonic propagation velocity thus controlling the concentration of mother liquid A in a crystal can 30a.

49. 发明专利

JPH0740074B2 失效
公开(公告)号：JPH0740074B2
公开(公告)日：1995-05-01
申请号：JP6021891
申请日：1991-03-25
IPC分类号： G01N9/24 , G01N23/04 , G21C17/00 , G21C17/06

50. 发明专利

JPH0739651B2 失效
公开(公告)号：JPH0739651B2
公开(公告)日：1995-05-01
申请号：JP5882991
申请日：1991-03-22
IPC分类号： E02D5/18 , G01N9/24

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