EP0062629A1 - Procede et appareil d'enregistrement d'une quantite a mesurer dependant du temps - Google Patents

Procede et appareil d'enregistrement d'une quantite a mesurer dependant du temps

Info

Publication number
EP0062629A1
EP0062629A1 EP19800901464 EP80901464A EP0062629A1 EP 0062629 A1 EP0062629 A1 EP 0062629A1 EP 19800901464 EP19800901464 EP 19800901464 EP 80901464 A EP80901464 A EP 80901464A EP 0062629 A1 EP0062629 A1 EP 0062629A1
Authority
EP
European Patent Office
Prior art keywords
emission
registration
zone
film
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19800901464
Other languages
German (de)
English (en)
Inventor
Olof Bernhardt Gunnar LÖFMAN
Carl Owe LÖFMAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOFMAN CARL OWE
Original Assignee
LOFMAN CARL OWE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LOFMAN CARL OWE filed Critical LOFMAN CARL OWE
Publication of EP0062629A1 publication Critical patent/EP0062629A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/04—Measuring arrangements giving results other than momentary value of variable, of general application giving integrated values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
    • G01H3/10—Amplitude; Power
    • G01H3/14—Measuring mean amplitude; Measuring mean power; Measuring time integral of power
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/404—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values
    • G01R13/405—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/404—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values
    • G01R13/407—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of passive display elements, e.g. liquid crystal or Kerr-effect display elements

Definitions

  • the present invention relates to the registration or recording of a measured quantity, which is time-dependent and which is present in the form of an electrical signal, the registration being of the kind including conversion or transformation of the signal to an emission or radiation flow, with detection and integrating registration of thus generated emission by means of an element sensitive to said emission, said element thus being given a subsequently read ⁇ able, integrated measurement value registration correspond- ing to a time function of the quantity to be measured.
  • the obtained measurement value registration can especially re ⁇ present an exposure dose.
  • Each LED has allotte to it a given portion of a photographic film, where the emis ' sion flow of the associated LED is detected and integrat ingly recorded as a film darkening.
  • the film will accordingly carry a number of integrated measurement value registrat ons (dose records) corresponding to the number of measurement intervals, i.e. to the number of LEDs, each registration representing the noise dose for the associated measurement interval.
  • the respective noise doses may be subsequently established by determining the degree of darkening (after developing the film) on the respective portions of the film by comparison with known degrees of darkening, e.g. in a so-called densiometer.
  • a recording apparatus that is constructed in accord ⁇ ance with the known principles described above affords a number of advantages, such as: Permitting registration of measured quantity sequences having very short duration, e.g. sound impulses; Operation entirely without moving parts Easily miniaturisable utilizing modern transducer and other circuit and electronics components, making it particularly well suited to applications for personal wear.
  • This known kind of registering apparatus has a clear disadvantage however, since the actual determination of an obtained measurement value is complicated, and requires densiometric equipment or other similar, advanced laboratory equipment.
  • the object of the present invention is thus to provide a new, improved method of registration, of the kind mention ⁇ ed in the introduction, by means of which said disadvantage is overcome, in that a direct reading of the obtained measur ment value is enabled, other advantages also being gained such as excellent possibilities of adaptation to different registration requirements, and the possibility of accurate multi-interval registration, even in cases where greatly differing activities of quantities to be measured can be ex ⁇ pected in the various measurement intervals.
  • the above-mentioned object is achieved in accordance with the invention by a method and apparatus being given the features set forth in the appended claims.
  • the invention thus means that the element detecting and integratingly recording the generated emission or radiation for every desired measurement value relatable to the measured quantity as such, or a given interval for the measured quantity value, is provided with a regi ⁇ stration, the readable extension of which constitutes a directly determinable measure of the desired measurement value.
  • the extent of the readable regi ⁇ stration on the element increases according as the received integrated emission flow increases.
  • the extension of the registration may be continuous or stepwise, with cohesive or separate zone parts or portions.
  • registratio is made in the form of a bar, the readable extent of which (growing during a registration sequence) will be a direct measure of the recorded measurement value.
  • the extension characteristic of th * e registration may be adapted to expect ed, measured quantity sequence, registration duration time, etc., and in principle it may be linear or logarythmic, for example.
  • a registration method of the kind mentioned distinguished in that the generated emission flow, preferably in response to the measured quantity value and particularly for a- preselected measured quantity interval, is caused to affect a plurality of preferably continuous parts or portions of said element so that each portion is * given a readable, partial registration when the appropriate portion has been subjected to an emission effect correspond ⁇ ing to a unique, integrated partial measurement value allotted to the portion, wherein,after a registration sequence, each part or portion having a readable partial registration indicates that at least an integrated measure ⁇ ment value corresponding to this part or portion has been recorded, the greatest readable, partial measurement value then representing a directly readable, integrated measure ⁇ ment value.
  • the indi ⁇ vidual parts or portions will have very small or infini- tesemal extension.
  • the generated emission flow is caused to affect said element spread out, preferably in the form of a bar including said parts or portions, there being provided at emission influence a registration effect per unit of time, preferably a film darkening effect, which has a predetermined unique magnitude for each respective one of the various parts or portions of the emission-influenced zone of said element. It is suitable here to make the emission intensities incident on the various parts or port ⁇ ions of the emission affected or influenced zone of said element continuously or stepwise reduced in relation to each other and/or to use an element different sensi ⁇ tivities to the -emission ⁇ iich are continuously or stepwise reduced in relation to each other for the various portions of the zone affected by the emission.
  • the flow is caused to strike with different intensities respective portions of the zone affected by emission on said element. It is also possible, however, to generate the emission such that it includes, per se, portions with different, suitable emission intensities.
  • the method in accordance w * ith the invention may also include giving the various portions of the emission-affecte zone of said element different pre-registrations such as pre-irradiations, so that in conjunction with a registrat ⁇ ion process, each portion is given a readable partial re- gistration for a particular emission effect, unique to that portion. It will be understood that pre-registration may be combined with one or more of the previously described mea ⁇ sures.
  • an apparatus for registering a time-dependent quantity to be measured which is in the form of an electri signal
  • the apparatus comprising means for converting or transforming the electric signal to an emission or radiatio flow, which is specifically allotted a measurement value registration, and preferably including means for controllin the conversion in response to the measured quantity value, particularly so that the conversion and therewith associate registration take place when said value is within a pre ⁇ determined interval; an element having the ability of de ⁇ tecting and integratingly registering the emission in quest ion, such as a photographic film; and emission control mean for causing the emission flow generated by said conversion means to strike said detection and registration element for affecting it, so that the element is given an integrated measurement value registration corresponding to a time func ion of the measured quantity, such as an exposure dose, the apparatus being distinguished in that said conversion and emission control means are arranged to provide the incidenc of said emission flow on a zone or area of said element, comprising a number of .parts
  • Said means providing different incident emission intensities include to advantage filter-means adapted for selectively moderating the portions of the generated emissi flow incident on the respective portions of the e ission- -affected zone.
  • Said filter means are here given an emissio alternating characteristic adjusted to the emission inten ⁇ sity incident on the filter, the emission sensitivity of said element and expected recorded dose (i.e. expected tota action time of the measured quantity) during a recording process, which may naturally embrace a period of time hav ⁇ ing greatly varying duration, e.g. from minutes to days, weeks or longer, according as the field of use.
  • the various portions of the emission- -affected zone suitably have different emission sensitivi ⁇ ties.
  • this has a suitably graded sensitivity in the various portions of the emission-affected zone.
  • the portion first to have a readable registration (low measurement value) when emissio -affected suitably having been given heavy preregistration and vice versa, i.e. the portion to have a readable regist- ration for a large measurement value having been given slight, or no prereg-istration.
  • the invention is particu ⁇ larly well suited for utilization in dosimetric investigat ⁇ ions, especially in conjunction with exposure to different physical and chemical agents in the working environment, where a simple, easily handled, miniaturised recording appa ⁇ ratus, which can be worn by a person is of great worth, as well as the possibility of rapid and simple reading of measurement values obtained.
  • the invention is, however, generally usable in conjunction with data registration, whe a time function of a measured quantity is required, e.g. in industrial process monitoring, long-term registration of climatic variables, recording speed-ometers, etc, above all where graphical display in a bar chart diagram is of clarity
  • Fig. 1 very schematically illustrates the constructio of an apparatus in accordance with the invention, the electrical part thereof being in block diagram form, while the main features of the emission generation and registrat ⁇ ion part are shown in perspective.
  • Fig. 2 schematically illustrates the construction of a level or measuring inter- val separator included in the block diagram of Fig. 1 , as well as the emission generation and registration part, seen from above.
  • Fig. 3 is a schematic sectional view of an example of how the emission generation and registration components of the apparatus may be arranged in a casing.
  • Fig. 4 illustrates in a schematic perspective view the arrangement of Fig. 3 with a film magazine part included therein in a swung-out position.
  • the apparatus illustrated in Figs. 1 and 2 is arrange for 4-channel regist'ration in the form of a bar chart, whic thus comprises four separately readable bar registrations. Three of the channels and their corresponding bars are in ⁇ tended for registering a measured quantity within three mutually separated measuring intervals, while the fourth channel is intended for pure time registration, i.e.- regi ⁇ stration of the total time for the registration sequence.
  • the apparatus includes a measurement signal transducer 1, for transmitting a measurement signal, the magnitude of which is dependent on the value of the measured quantity, to an amplifier 2.
  • the amplified signal leaving * the ampli-.. bomb is applied to a level or measuring interval separator 5
  • said separator 3 emits a control signal respectively on a first output line 4, a second output line 5 or a ' third output line 6.
  • lines 4,5 and 6 are con ⁇ nected to an associated respective driving stage 7,8 and 9 for respective LEDs 10,11 and 12.
  • a fourth LED 15 is arrang- ed to be driven by an associated driving stage 14.
  • Each of the units 1,2,5,7,8 and 9 are supplied with current via a line 15 when a power supply circuit 16 ener ⁇ gising the apparatus is closed.
  • the driving stage 14 is also supplied with current via line 15, but is further arranged to supply driving power to its associated LED 15 as soon as there is power on line 15.
  • the driving stages 7,8 and 9, however, are arranged to give driving power to their respective LEDs only when they also receive a con ⁇ trol signal on the respective line 4,5,6. It will thus be understood that when the apparatus is energised, LED 13 emits radiation continuously, while only one of LEDs 10,11,12 emits radiation at a time, in response to the magnitude of the signal obtained from the measure ⁇ ment signal transducer 1.
  • Each of LEDs 10-15 is adapted for generating and emit ing radiation having" constant intensity.
  • the emission or radiation flow 20,21,22 and 23, respectively, from the respective LED (only one of flows 20-22 is present at a time) is separated from the other radiation flows with the aid of suitable means 24-27, indicated in Fig. 2, but not more closely shown, and said flow is directed to an allotte zone of a film 28, of constant sensitivity to radiation, vi a respective filter 30,51,32,35 and a respective aperture slit 54,55 " ,36,37 in an aperture means 38 arranged between t film 28 and the LEDs.
  • Each filter has a special attenuating characteristic, attenuating ability of the filter increasin vertically from bottom to top.
  • a stepwise increase is assum ed in the present case (the filter may be assumed to have five partial sections with constant attenuating ability in each section) , although there could be a continuously loga- rythmically increasing attenuating ability, for example.
  • Each- LED will thus irradiate a bar-shaped zone on the film, the dose of irradiation received per time unit will be dif ⁇ ferent for the five film zone portions or parts correspond- ing to the five partial sections of the associated filter, and it will be stepwise decreasing from the bottom and up-
  • the filters 30-33 preferably are "grey ⁇ s * edges" con ⁇ sisting of suitably shaded or darkened film (having step ⁇ wise increasing shading or darkening in the example) .
  • the filters will thereby be simple to manufacture and to arrange, while at the same time there is ensured very good reproduceability of the attenuating characteristics. Further more, it will be very simple to change filters in conjunct ⁇ ion with a change in registration task.
  • the film 28 is suitably of the monochrome, fine-grain, high-contrast type, with low, constant light sensitivity, so-called document film.
  • the height of the directly readable darkening or shading in the respective bar on the film will be dependent on the time during which the LED of the associated channel or measuring interval has been energised so as to emit radiation, or in other words on the integrated measured quantity value of the measuring interval in question. Since the selected attenuation characteristic and film sens ty of the filter are known, and with knowledge of previously produced calibration values, the readable bar height will be a directly readable measure of the desired measurement value of the associated measuring interval. In respect of the time channel, the readable bar height obtaine will naturally be, in a similar way, a directly readable measure of the total registration time, i.e. the time the Hughes apparatus has been energised. In conjunction with the use of minature-format film, reading off the height of the resp ⁇ ective bar is suitably done with the aid of graduated measur ent magnifier.
  • the sepa ⁇ rator 5 sho ⁇ vn in this figure includes three threshold cir ⁇ cuits 40,41,42, the inputs of which are connected to the out put of amplifier 2 via associated, adjustable signal attenu ⁇ ating elements 45,44, and 45, respectively, shown here as simple potentiometers.
  • the output of threshold circuit 40 is connected to driving stage 7 via a blocking circuit 46.
  • threshold circuit 41 is connected to driving stage 8 via a blocking circuit 47.
  • the output of threshold circuit 42 is connected directly to driving stage 9.
  • the control input of blocking circuit 46 is connected to the output of threshold circuit 41.
  • the control input of block ⁇ ing circuit 47 is connected to the output of threshold circuit 42.
  • the blocking circuits' function is to block signal passage when there is a signal on the respective control input.
  • the threshold circuits' function is to emit a driving amplifier control signal from the respective output as long as the input signal on the respective input exceeds a given level.
  • circuit 40 emits a signal when the signal supplied from amplifier 2 exceeds the above-mentioned first set value
  • circuit 41 emits a signal when the supplied signal - exceeds the second set value
  • circuit 42 emits a signal when the supplied signal exceeds the third set value.
  • Blocking circuits 46,47 ensure that only the driving stage control signal, corresponding .to the highest threshold function, is allowed to pass on to the associated driving stage.
  • Figures 3 and 4 illustrate very schematically how the inventive apparatus may be arranged in a casing.
  • This con- makeup sists of two parts, namely a housing part 50, open on one side, and accommodating all the electric components and necessary filters, and a lid and film magazine part 51 closing off the housing part and containing the slit aper ⁇ ture 38 and film 28.
  • This part 51 can be swung out and is removable.
  • the four filters 30-33 are combined into a single filter 52 having a width such that each of its transversely extending partial sect- ions 55 cover all four parallel radiation channels.
  • Filter 52 is arranged in the opening of housing part 50 for easy
  • a interchangeability has an outwardly curved configurat ⁇ ion.
  • Aperture 38 is arranged in the opening of lid part 51 and is inwardly curved for matching with filter 52 in the closed position illustrated in Fig. 3.
  • the film 28 is arranged behind aperture 38, the plane of the film having corresponding curvature.
  • LEDs 10-13 are arranged in housing part 50, and centrally in relation to the curved film plane so that the distance between film and diode is substantiall the same for the entire film plane.
  • registration on the film could be controlled using colour film technique (preferably ortho- or panchromafic) with filter functions provided by complementary colours giving different continuous or step ⁇ wise extinction curves.
  • the emission or radiation ' signal ⁇ vhich darkens or shades the film could also be regulated using a polarisation technique.
  • Stepwise transmissivity differences may thus be provided in a filter containing polarising filter portions having stepwise differing optica axis.
  • the registration threshold (the sensi ⁇ tivity adapted to different input values/time duration for t measurement) can also be varied mechanically by a rotatable polarising filter in front of the LED.
  • a transparent scale possibly with numerical values, may be placed in the gap between filter and film. After the registration the scale then appears with its high ⁇ est value corresponding to the highest shaded part of the filter and the result can be seen in a clear manner.
  • a fixed scale may alternatively be pre-exposed on the film to one side of the bars.
  • a still further simplification may be obtained in the cases where it is possible to use a film of the Polaroid ® type, since the special development requirement would no longer be applicable. If such film of a larger format is used, after a registration sequence the measurement values registrations obtained may be read off almost immediately, directly with the aid of a simple graduated ruler.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Measurement Of Radiation (AREA)

Abstract

Des donnees dosimetriques sont enregistrees dans plusieurs canaux sous la forme d'un diagramme de Gantt pouvant etre lu directement, la hauteur de l'enregistrement de chaque batonnet respectif pouvant etre lue et etant une mesure directe de la valeur de la dose integree du canal associe. De preference, l'enregistrement est effectue a l'aide d'un transducteur de signaux de mesure (1) et d'un separateur d'intervalles de mesure (3) connecte a celui-ci, le separateur commandant plusieurs canaux d'enregistrement paralleles, chacun des canaux comprenant une diode a emission lumineuse LED (10-13), un film (28) pour l'integration de l'enregistrement des radiations emises par la LED, une ouverture en forme de fente (34-37) pour former une incidence en forme de batonnet du flux rayonnant sur le film, et un filtre gris en forme de coin (30-33) attenuant l'intensite des radiations du flux qui heurtent le film, pas a pas ou en continu dans le sens du batonnet.
EP19800901464 1980-06-26 1980-06-26 Procede et appareil d'enregistrement d'une quantite a mesurer dependant du temps Withdrawn EP0062629A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1980/000178 WO1982000055A1 (fr) 1980-06-26 1980-06-26 Procede et appareil d'enregistrement d'une quantite a mesurer dependant du temps

Publications (1)

Publication Number Publication Date
EP0062629A1 true EP0062629A1 (fr) 1982-10-20

Family

ID=20339931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800901464 Withdrawn EP0062629A1 (fr) 1980-06-26 1980-06-26 Procede et appareil d'enregistrement d'une quantite a mesurer dependant du temps

Country Status (2)

Country Link
EP (1) EP0062629A1 (fr)
WO (1) WO1982000055A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB456616A (en) * 1934-10-26 1936-11-12 Alfred Reinsch Improvements in and relating to apparatus for objectively determining the degree of loudness of noises
US3091506A (en) * 1960-06-13 1963-05-28 Mcdonnell Aircraft Corp Data recorder
US3173745A (en) * 1960-06-15 1965-03-16 Mcdonnell Aircraft Corp Image producing device and control therefor
FR1497739A (fr) * 1966-10-19 1967-10-13 Appareil de mesure d'une dose de bruit
US3438057A (en) * 1966-12-30 1969-04-08 Texas Instruments Inc Photographic recorder using an array of solid state light emitters
US3545564A (en) * 1969-07-02 1970-12-08 Alfred W Barber Sound level indicator for the precise determination of sound levels
SE383043B (sv) * 1974-10-24 1976-02-23 Shine Patent Ab Forfarande och anordning vid metning och registrering av buller
US3988742A (en) * 1975-04-28 1976-10-26 Mcdonnell Douglas Corporation Recorder using light emitting diodes
SE415396B (sv) * 1978-12-17 1980-09-29 Lofman Olof Bernard G Forfarande och anordning for registrering av en tidsberoende metstorhet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8200055A1 *

Also Published As

Publication number Publication date
WO1982000055A1 (fr) 1982-01-07

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