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1. WO1996004529 - DEPOSITION SENSING METHOD AND APPARATUS

Publication Number WO/1996/004529
Publication Date 15.02.1996
International Application No. PCT/IB1995/000585
International Filing Date 25.07.1995
Chapter 2 Demand Filed 01.03.1996
IPC
G01G 3/14 2006.01
GPHYSICS
01MEASURING; TESTING
GWEIGHING
3Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
12wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
14measuring variations of electrical resistance
G01G 3/16 2006.01
GPHYSICS
01MEASURING; TESTING
GWEIGHING
3Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
12wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
16measuring variations of frequency of oscillations of the body
CPC
G01G 3/1402
GPHYSICS
01MEASURING; TESTING
GWEIGHING
3Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
12wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
14measuring variations of electrical resistance
1402Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
G01G 3/165
GPHYSICS
01MEASURING; TESTING
GWEIGHING
3Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
12wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
16measuring variations of frequency of oscillations of the body
165Constructional details
Applicants
  • W.R. GRACE & CO.-CONN. [US/US]; 1114 Avenue of the Americas New York, NY 10036, US (AllExceptUS)
  • MERCUSOT, Michel [FR/BE]; BE (UsOnly)
  • DECLERCQ, Ghislain [BE/BE]; BE (UsOnly)
Inventors
  • MERCUSOT, Michel; BE
  • DECLERCQ, Ghislain; BE
Agents
  • BARLOW, Roy, James; J.A. Kemp & Co. 14 South Square Gray's Inn London WC1R 5LX, GB
Priority Data
9415585.002.08.1994GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DEPOSITION SENSING METHOD AND APPARATUS
(FR) PROCEDE ET APPAREIL DE DETECTION DE DEPOT
Abstract
(EN)
A sensor for deposit build-up in plant, for example a paper-making installation, comprising a probe (30) mounted with respect to a mounting body (31) and including at least one strain gauge for measuring the flexural strain in a flexurally deformable body strained by imbalance in the probe in response to the combined mass of the probe and the deposit build-up thereon. The process of the invention envisages using the resulting signal for controlling the application of a deposit-controlling composition. An optional further sensor (88) enables detection of the nature of the deposition whose quantity is sensed by the strain gauge.
(FR)
L'invention concerne un dispositif destiné à détecter un dépôt se formant dans une installation, par exemple une installation de fabrication du papier, comprenant une sonde (30) montée dans un corps de montage (31) et pourvue d'au moins une jauge de contrainte servant à mesurer la contrainte de flexion dans un corps pouvant effectuer une flexion, lorsque celui-ci est soumis à une contrainte résultant d'un déséquilibre de la sonde dû à la masse combinée de la sonde et du dépôt qui s'est formé sur celle-ci. Il est prévu, selon le procédé présenté, que le signal produit soit utilisé pour commander l'application d'une composition destinée à éliminer le dépôt. Selon un autre mode de réalisation, le détecteur (88) permet de déterminer la nature du dépôt dont la quantité est mesurée par l'intermédiaire de la jauge de contrainte.
Also published as
FI970413
NO19970403
NZ289206
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