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WO1999035507A1 - Procede et dispositif de capture et de traitement de signaux electriques - Google Patents

Procede et dispositif de capture et de traitement de signaux electriques Download PDF

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Publication number
WO1999035507A1
WO1999035507A1 PCT/SE1998/002423 SE9802423W WO9935507A1 WO 1999035507 A1 WO1999035507 A1 WO 1999035507A1 SE 9802423 W SE9802423 W SE 9802423W WO 9935507 A1 WO9935507 A1 WO 9935507A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric
die
conductors
relation
sensing unit
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.)
Ceased
Application number
PCT/SE1998/002423
Other languages
English (en)
Inventor
Daniel Assai
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.)
EP INTERNATIONAL AB
Original Assignee
EP INTERNATIONAL AB
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 EP INTERNATIONAL AB filed Critical EP INTERNATIONAL AB
Priority to EP98964661A priority Critical patent/EP1042680A1/fr
Publication of WO1999035507A1 publication Critical patent/WO1999035507A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
    • G01R29/0878—Sensors; antennas; probes; detectors

Definitions

  • the present invention relates to a method of capturing and processing electric signals in order to provide a relevant impression of any possible risk of electric flash-over from, primarily, high voltage alternating current lines to, primarily, a human being and a device for carrying out the method.
  • Such field-strength meters also suffer additionally from the disadvantage ⁇ iat if the alternating current conductors or lines that generate the electric fields which are potentially dangerous for an individual has a high capacitance in relation to the known field-strength meters, the latter will not always function in the intended manner.
  • certain known field strength meters require some form of external grounding in order to be able to provide correct values for the field strength in a given point and are also extremely sensitive to the direction of the electric field, so that if, for example, the active plates of a known field- strength meter are inadvertently placed incorrectly in relation to the direction of the electric field, misleading measurement values are generated.
  • the function of the field-strength meter according to Swedish patent No.
  • the object of the present invention is to eliminate or reduce the disadvantages described above and other disadvantages associated with the known solutions and has been elaborated according to the method mentioned in the descriptive preamble so that disengaged from direct electrical connections with the surroimdings, a measurement of electric field strength is sensed in a point by means of at least one sensing unit which is equipped with two electric conductors with differendy sized areas in relation to each other which electric conductors from the electrical point of view are isolated from each otiier, die said sensing unit with its smaller area tiien always being located closer to die origin of die said field strength than its larger area, and an alternating voltage generated across the said two electric conductors with different areas is signal- processed and presented as a measure of die said risk of electric flash-over.
  • the device according to the present invention has also, for the purpose of solving tiiese tasks, been designed with at least one sensing unit, which is fitted with two electric conductors with differendy sized areas in relation to each other.
  • These electric conductors are from die electrical point of view insulated from each other by means of an isolating layer, the said sensing unit with its smaller area tiien being located closer to die origin of the said field strength than its larger area, and an alternating voltage generated across the said two electric conductors is signal-processed with the aid of adapted electronic circuits and then presented as a measurement of the said risk of electric flash-over.
  • Fig. 1 shows a perspective view of one embodiment of a reception unit chosen by way of example
  • Fig. 2 shows an equivalent circuit, from an electrical point of view, for the reception unit according to Fig. 1,
  • Fig. 3 shows a block diagram chosen by way of example of an exemplified measuring and indicator unit to which the reception unit according to Fig. 1 is connected in accordance witii the present invention
  • Fig. 4-10 show wiring diagrams chosen by way of example of different electric connections included in die said measuring and indicator unit according to the present invention, die details of which will be dealt with more closely in connection witii the description of tiieir main tasks.
  • the reception unit shown in Fig. 1 includes as fundamental details a first electrically conductive surface lc - for example a thin, flexible copper strip - with a certain surface or area, a second electrically conductive area 2c with a certain larger surface or area in relation to die first electrically conductive area - for example approximately twice as large and consisting of a thin, flexible copper strip - and an appropriately flexible electric isolator 3c located between these two electrically conductive surfaces lc and 2c, which electric isolator consequendy from the electrical point of view isolate and separate - for example by 6-10 mm but the more the better - the said electrically conductive, differendy sized surfaces lc and 2c.
  • the latter two surfaces lc and 2c are so located that the surface lc, which is smaller in size, always faces towards and the surface 2c which is larger in size always faces away from a preferably high-tension alternating current source, die potential risk of which for generating electrical flash-over in a point to an individual or possibly to an object it is intended to be determined and evaluated with the aid of the present invention.
  • Potential field directions are indicated with unbroken arrows in Fig. 1.
  • the first electrically conductive surface lc, the second electrically conductive surface 2 c and the insulating layer 3 c may per se consist of flexible straps which can be shaped into an essentially ring-shaped - or shaped into part of a ring - openable and closable unit so as to be able to be applied advantageously around protruding parts of an individual such as ankles or wrists, for example in a corresponding way to that in which a watch strap can be applied around a wrist with the aid of buckles, Velcro strips, adjustable links etc.
  • the reception unit consists of a plurahty of essentially identical parts, which are articulated jointed in relation to each other, appropriately via the end edges of the isolating layers 3a, 3b, 3c, 3d, and which from an electrical point of view are each per se connected in series, with the electric conductors with a small area la, lb, lc, Id, le connected in series each per se via, appropriately, articulated jointed links 5a-5d, and with die electric conductors with a large area 2a, 2b, 2c, 2d, 2e being connected in series each per se via appropriately articulated jointed links 6a, 6b, 6c, 6d.
  • the outer isolating layers 3a and 3f are mechanically connected togedier by means of mutually overlapping adjustment straps 4a, 4b, which in die present case are fitted with, for example, Velcro straps with which they can be mechanically connected together in relation to one another, whereby - as is evident from Fig. 1 - die aperture of the reception unit can be adjusted for different sizes of, for example, the ankles or wrists or otiier protruding parts which are to be furnished witii the reception unit or units in accordance with the present invention.
  • Fig. 2 Illustrated by Fig. 2 is die electrical equivalence circuit for the reception unit according to Fig. 1.
  • This equivalent electric circuit includes a capacitance 7 with a relatively low value, which comprises the capacitance of the electric conductor 1 with a small area in relation to the ambient air surrounding the electric conductor 1 with the small area. It is further assumed in this exemplified case that an individual is carrying die reception unit according to Fig. 1 around his one wrist witii the electric conductor 2 witii the large area facing towards he wrist.
  • the capacitance existing between the body of the individual in question and the electric conductor 2 with a large area is designated 8 in Fig. 2 and has a capacitance that is appreciably larger than the capacitance of the electric conductor 1 with a small area in relation to the ambient air.
  • the reference of die reception unit is designated 9b in Fig. 3 and is chosen to comprise the actual potential of the electric conductor 2 with large area and a signal is designated 9a with a varying voltage in relation essentially to the electric field strength in question in the point of measurement for the electric conductor 1 with small area.
  • the reference 9b and the varying voltage 9a are signal-processed after having been captured and are fed for this purpose according to Fig. 3 at 9 - which may per se by way of example consist of two connection pins (not shown in the drawings) to die electric conductor 1 with small area of the reception unit and electric conductor 2 with large area to a protection 10.
  • This protection 10 is utilised in principle for die reason that the signal 9a entering on the electric conductor 1 with small area can contain severe disturbances of different kinds, from which disturbances the subsequent signal-processing electronics must be protected.
  • die signal 9a is conducted tiirough an inductance 10a of, for example, 4.7 ⁇ H, connected in series witii a resistance 10b of, for example, 1 m ⁇ , overtones to the said signal 9b tiien being disconnected via a zener diode 10c of, for example, type BZW060, whereby any transients across the zener diode 10c are connected to the ground of the circuit.
  • the protection 10 also includes - as is particularly evident from
  • Fig. 4 - a circuit which acts in principle as a low-pass filter and which can include a resistance lOd of, for example, 1 m ⁇ , a capacitor lOe of, for example, 1 nF connected to the ground of the circuit and a capacitor of, for example, 1 nF conducting the signal on to a further circuit which acts in principle as a high-pass filter and which may include a resistance llg of, for example, 10 m ⁇ connected to the ground of the circuit, a capacitor llh of, for example, 1 nF passing the signal on to a point of connection between the positive input to an operation amplifier 13 of, for example, type LMC6482 and a resistance Hi of, for example, 10 m ⁇ , to the other end of which a second reference voltage 12, as indicated more closely hereinbelow, is connected.
  • a resistance llOd of, for example, 1 m ⁇
  • a capacitor lOe of, for example, 1 nF connected to the ground of the circuit
  • the said second reference voltage 12 is connected via a resistance 14a of, for example, 10 k ⁇ connected partly to the negative input of the operation amplifier 13 and partiy to one stationary end of an adjustable resistance 15a of 100 k ⁇ , the other stationary end and variable part of which variable resistance are interconnected and connected to the output 13a of the operation amplifier 13.
  • a sharp band pass-filter 16 connected after the protection 10 is a sharp band pass-filter 16 - see especially Fig. 3 and Fig. 5. - for a mains frequency of, for example, 50 Hz, to which output 13a of die operation amplifier 13 is connected, see especially Fig. 5.
  • the said band-pass filter 16 includes a resistance 16a of, for example, 47 k ⁇ connected in series with the output 13 a of the operation amplifier 13, die other end of its resistance 16a is connected together with a jimction point between a capacitor 16b of, for example, 10 nF, the other end of which is connected to d e ground of die circuit and a capacitor 16c of, for example, 10 nF, the other end of which is connected to a junction point between a resistance 16d of, for example, 56 k ⁇ and a capacitor 16e of, for example, 10 nF.
  • die capacitor 16e is connected to die positive input of an operation amplifier 16g of, for example, type LMC6482, to which the second reference voltage 12 is also connected via a resistance 16f of, for example, 1,8 k ⁇ .
  • the other end of the resistance 16d is connected to the negative input of the operation amplifier 16g and to its output 16h.
  • the signal is thus processed after having been captured in the reception unit according to Fig. 1 in order to sort away unimportant and/or irrelevant information through the above mentioned protection 10 and band-pass filter 16.
  • high frequencies are damped out and for another thing direct voltage is filtered off, whereby the influence from high-frequency radiation sources is eliminated, for example from radio and telephone traffic, light arcs, corona discharges etc.
  • the amplifier 17 Connected after the band-pass filter 16 is an amplifier 17 with its amplification factor setting engaged - see Fig. 3 and especially Fig. 6 for closer details.
  • the amplifier 17 includes a resistance 17a of, for example, 10 k ⁇ , to one end of which output 16h from the band-pass filter 16 is connected and the other end of which is connected to the negative input of an operation amplifier 17d of type LMC6482, to which there are also connected two resistances 17b and 17c of, for example, 56k ⁇ and 12 k ⁇ , respectively, with which die other end of die latter one end of a toggle switch 17e, commercially designated, for example, SPDT and acting as a measuring range switch - which can, for example, change the measuring range by a factor of six - is connected in series, whereafter the other end of die resistance 17b and die otiier end of die toggle switch 17e are connected togetiier with output 17f of the operation amplifier 17d.
  • the positive input of the operation amplified is also connected to the second reference
  • a portable battery 21 - see especially Fig. 10 - of, for example type 3.6 V litiiium with a capacity of 2100 mAh supplies the device with the necessary feed energy via a toggle switch 2 Id, commercially designated, for example, SPDT, which toggle switch 2 Id in the activated state feeds a positive voltage from the battery 21a to an output 21e, across which two capacitors 21b and 12c are connected, each of die said capacitors 21b and 12c having a capacitance of 10 ⁇ F.
  • This output 21e is in turn connected to several points in other Figures 7-8, all of which points are designated 21e in the respective Figures. Shown in Fig.
  • die second reference voltage 12 is supplied via a connection point which includes a resistance of, for example, 1 k ⁇ , connected together with a capacitor 21g of, for example, 10 ⁇ F, the other end of which is connected to the ground of die circuit.
  • the other end of the resistance 2 If is connected to short-circuited inputs 6 and 7 of an LED drive circuit 18k of, for example, type LM3419 and in addition a resistance inputs 6 (RHI) and 7 (RFF) of the drive circuit 18k for the light emitting diodes.
  • the output 17 - see especially Fig. 6 - is also connected to one end of a resistance 18b of, for example, 10 k ⁇ - see especially the left hand part of Fig. 7.
  • the second reference voltage 12 is also connected to one side of a resistance 18a of, for example, 10 m ⁇ , the other end of which is connected to input 9 of the said operation amplifier, and the otiier end of die resistance 18b is connected to input 10 of die said operation amplifier 13, to which a resistance 18c of, for example, 10 k ⁇ is also connected.
  • the input 11 of the operation amplifier 13 is connected to the ground of the circuit and connection 4 of die operation amplifier 13 is connected to output 21e - see especially Fig. 10.
  • the output 8 of die operation amplifier 13 is connected to the plus side of a diode 18f of, for example, type IN4181, while the negative side of the diode 18f is connected via a resistance 18g of, for example, 10 k ⁇ to an output 18j, to which output 21e is also connected via a resistance 18h of 2.2 m ⁇ and to which output 18j there is also connected a capacitor 18i of, say, 10 ⁇ F, the other end of which is connected to the ground of die circuit.
  • a resistance 18e of, for example, 10 m ⁇ is additionally connected between connection 9 of the operation amplifier and output 18j.
  • the signal is tiius converted and measured by the converter 18, which decides which of the LED diodes 20a-20e shall be lit.
  • the higher the input signal the larger the number of LED diodes that will be lit and die LED stack 20a-20e is driven by the LED driver 18k.
  • output 18j is connected to connection 5 (SIG) of the LED driver 18k.
  • the output 21e is also connected to inputs 9 (MODE) and 3 (V+) of the LED driver 18k.
  • Connections 8 (ADJ), 4 (RLO) and 2 (v-) of the LED driver are all connected to the ground of the circuit.
  • Connections 12, 14, 16, 18 and 1 of die LED driver are each connected to LED diodes 20a, 20b, 20c, 20d and 20e, respectively, each of which is of, for example, type LTL353CKH4 red 1000 mcd.
  • an acoustic alarm 19 which includes a switch 19f of, for example, type BCD DRR4010.
  • the latter is arranged, via a resistance 19d of, for example, 3.3 k ⁇ , to steer out a transistor 19a of, for example, type PNP BC327 to drive, via a resistance 19b of, for example, 47 ⁇ , a buzzer 19b of, for example, type MEB-12C-5.
  • the output 21e is also connected to the output of the switch 19f via a resistancel9e of, for example, 10 k ⁇ .
  • the sound signal of the buzzer 19c can be set, for example, to sound when a certain LED diode (out of, for example, 4) is lit to indicate that a certain sensing level has been exceeded.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Electrotherapy Devices (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de capture et de traitement de signaux électriques au moyen de, par exemple, une batterie électrique afin de créer une impression de risque de décharge en surface à partir de lignes de courant alternatif haute tension sur un être humain (un individu). Le procédé et le dispositif selon l'invention se distinguent en ce qu'au moyen d'au moins une unité de détection, on prend une mesure, dégagée de toute connexion électrique directe avec les environs, d'une puissance de champ électrique à un point. L'unité de détection est équipée de deux conducteurs électriques comportant deux zones de dimensions différentes l'une par rapport à l'autre, électriquement isolées l'une de l'autre, la zone de dimension inférieure de l'unité de détection étant toujours située le plus près de l'origine de la puissance de champ que la zone de dimension supérieure. On traite les signaux de la tension alternative générée aux bornes des deux conducteurs électriques à zones différentes et qu'on présente comme une mesure du risque de décharge en surface.
PCT/SE1998/002423 1997-12-22 1998-12-22 Procede et dispositif de capture et de traitement de signaux electriques Ceased WO1999035507A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98964661A EP1042680A1 (fr) 1997-12-22 1998-12-22 Procede et dispositif de capture et de traitement de signaux electriques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9704816A SE9704816L (sv) 1997-12-22 1997-12-22 Sätt och anordning för att fånga upp och behandla elektriska signaler
SE9704816-9 1997-12-22

Publications (1)

Publication Number Publication Date
WO1999035507A1 true WO1999035507A1 (fr) 1999-07-15

Family

ID=20409521

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/002423 Ceased WO1999035507A1 (fr) 1997-12-22 1998-12-22 Procede et dispositif de capture et de traitement de signaux electriques

Country Status (3)

Country Link
EP (1) EP1042680A1 (fr)
SE (1) SE9704816L (fr)
WO (1) WO1999035507A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630762A (zh) * 2013-07-26 2014-03-12 中国科学院电子学研究所 基于柔性衬底的微型三维电场传感器及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2164465A1 (fr) * 1971-12-21 1973-08-03 Medovnik Aron
US3873919A (en) * 1974-02-11 1975-03-25 Robert E Vosteen AC electric fieldmeter
US4039942A (en) * 1975-08-05 1977-08-02 David Glaser System for sensing electrical potential particularly in plants
EP0134943A1 (fr) * 1983-07-25 1985-03-27 Hydro-Quebec Système et procédé de détection d'approche pour lignes de courant
EP0266883A1 (fr) * 1986-10-03 1988-05-11 Hunting Communication Technology Limited Détection de tensions inadmissibles à un équipement mobile
EP0324217A1 (fr) * 1988-01-13 1989-07-19 Texaco Development Corporation Système de sécurité et procédé
WO1997009627A1 (fr) * 1995-09-08 1997-03-13 Philips Electronics N.V. Systeme de mesure d'un champ electrique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2164465A1 (fr) * 1971-12-21 1973-08-03 Medovnik Aron
US3873919A (en) * 1974-02-11 1975-03-25 Robert E Vosteen AC electric fieldmeter
US4039942A (en) * 1975-08-05 1977-08-02 David Glaser System for sensing electrical potential particularly in plants
EP0134943A1 (fr) * 1983-07-25 1985-03-27 Hydro-Quebec Système et procédé de détection d'approche pour lignes de courant
EP0266883A1 (fr) * 1986-10-03 1988-05-11 Hunting Communication Technology Limited Détection de tensions inadmissibles à un équipement mobile
EP0324217A1 (fr) * 1988-01-13 1989-07-19 Texaco Development Corporation Système de sécurité et procédé
WO1997009627A1 (fr) * 1995-09-08 1997-03-13 Philips Electronics N.V. Systeme de mesure d'un champ electrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630762A (zh) * 2013-07-26 2014-03-12 中国科学院电子学研究所 基于柔性衬底的微型三维电场传感器及其制备方法

Also Published As

Publication number Publication date
SE9704816D0 (sv) 1997-12-22
EP1042680A1 (fr) 2000-10-11
SE510079C2 (sv) 1999-04-19
SE9704816L (sv) 1999-04-19

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