DE3006620A1 - Contact pressure sensor - with dielectric enclosed between two contact layers - Google Patents

Contact pressure sensor - with dielectric enclosed between two contact layers

Info

Publication number
DE3006620A1
DE3006620A1 DE19803006620 DE3006620A DE3006620A1 DE 3006620 A1 DE3006620 A1 DE 3006620A1 DE 19803006620 DE19803006620 DE 19803006620 DE 3006620 A DE3006620 A DE 3006620A DE 3006620 A1 DE3006620 A1 DE 3006620A1
Authority
DE
Germany
Prior art keywords
pressure sensor
contact pressure
dielectric
contact
sensor according
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
DE19803006620
Other languages
German (de)
Inventor
Dieter Dipl.-Ing. 7000 Stuttgart Betz
Klaus Dr. 7016 Gerlingen Dobler
Günter Dr. 7252 Weil der Stadt Heinke
Heinz Dipl.-Ing. 7300 Esslingen Lauterbach
Günter 7121 Ingersheim Schirmer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19803006620 priority Critical patent/DE3006620A1/en
Publication of DE3006620A1 publication Critical patent/DE3006620A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/10—Mechanical actuation by pressure on floors, floor coverings, stair treads, counters, or tills
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/22—Status alarms responsive to presence or absence of persons

Abstract

Contact pressure sensor, for use e.g. as a burglar alarm, or for impact counting, consists of a dielectric which is enclosed between two electric feelers, one of them earthed and the other connected to an electronic circuit. The feelers can be the core and the concentric sheath of a coaxial cable, or they can be the top and bottom layer of a mat, in both cases separated by the dielectric layer. The preferred dielectric material is PTFE or polyvinylidene fluoride. The dielectric (12) is enclosed between two contact layers (14,15). Additional layers can be used for mechanical protection. The output signals are passed to stages (16,17) to differentiate certain signal amplitudes, each followed by a counter stage (18,19). The contact pressure sensors can be given any suitable shape and can be distributed without restriction over an area which is to be protected.

Description

BerührungsdrucksensorContact pressure sensor

Stand der Technik Die Erfindung geht aus von einem Berührungsdrucksensor nach der Gattung des Hauptanspruches.PRIOR ART The invention is based on a contact pressure sensor according to the genre of the main claim.

Es sind bereits Berührungsdrucksensoren der verschiedensten Arten bekannt, bei denen beispielsweise durch den Berührungsdruck ein Kontakt eines Signalkreises geschlossen oder durch den Berührungsdruck ein aktives elektrisches Signal, etwa durch einen piezoelektrischen Geber, ausgelöst wird.There are already contact pressure sensors of various types known in which, for example, a contact of a signal circuit through the touch pressure closed or an active electrical signal due to the contact pressure, for example is triggered by a piezoelectric transmitter.

Aus der Zeitschrift Elektronik 1978, Heft 3, Seite 83 sind weiterhin elektrostatische Tasten bekannt, bei denen die elektrischen Impulse gemessen werden, die an aufprallenden und zusammenstoßenden elektrisch neutralen Körpern erzeugt werden. Diese bekannten Tasten können jedoch nur jeweils an einem Punkt eines Raumes wirksam werden und gestatten nicht eine flächige Überwachung oder Kontaktgabemöglichkeit über einen Raum verteilt.From the magazine Electronics 1978, issue 3, page 83 are still electrostatic keys known, in which the electrical impulses are measured, generated by impacting and colliding electrically neutral bodies will. However, these known keys can only be used at one point in a room become effective and do not allow extensive monitoring or the possibility of making contact distributed over a room.

Vorteile der Erfindung Die erfindungsgemäßen Berührungsdrucksensoren mit den kennzeichnenden Merkmalen des Haupt- und Nebenanspruches haben demgegenüber den Vorteil, durch ihre räumlich nicht begrenzte Gestaltung die flächige Überwachung eines Raumes bzw.Advantages of the Invention The contact pressure sensors according to the invention with the characterizing features of the main and subsidiary claims have on the other hand the advantage of extensive surveillance due to its spatially not limited design of a room or

Kontaktgabemöglichkeit über einen Raum verteilt zu ermöglichen. Dabei können die erfindungsgemäßen Berührungsdrucksensoren in den verschiedensten Formen, jeweils in Anpassung an den zu überwachenden Raum hergestellt werden.To enable contact options distributed over a room. Included the contact pressure sensors according to the invention can be in various forms, each to be produced in adaptation to the room to be monitored.

Zeichnung Ausführungsbeispiele erfindungsgemäßer Berührungsdrucksensoren sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Fig. 1 einen Berührungsdrucksensor in Form eines Koaxialkabels; Fig. 2 einen Berührungsdrucksensor in Form einer Sensormatte.Drawing exemplary embodiments of contact pressure sensors according to the invention are shown in the drawing and explained in more detail in the description below. 1 shows a contact pressure sensor in the form of a coaxial cable; Fig. 2 a contact pressure sensor in the form of a sensor mat.

Beschreibung der Ausführungsbeispiele Das in Fig. 1 dargestellte erste Ausführungsbeispiel eines erfindungsgemäßen Berührungsdrucksensors ist nach Art eines Koaxialkabels aufgebaut. Dabei befindet sich zwischen einer äußeren Kontaktschicht 10 und einer inneren Kontaktschicht 11, die einem Mittelleiter vergleichbar ist, eine Zwischenschicht 12 als Dielektrikum. Wird, wie dargestellt, die äußere Kontaktschicht geerdet, kann an der inneren Kontaktschicht 11 über einen Verstärker 13 ein Signal dann abgenommen werden, wenn Druck auf den Berührungsdrucksensor ausgeübt wird. Bei Krafteinwirkung auf den Berührungsdrucksensor kommt es nämlich zu einer gegenseitigen Beeinflussung der gebundenen elektrostatischen Oberflächenladung, so daß zwischen der äußeren Kontakt schicht 10 und der inneren Kontaktschicht 11 ein aktives elektrisches Signal abnehmbar ist. Dieses Signal kann im nachfolgenden Verstärker 13 in an sich bekannter Weise verarbeitet und angezeigt werden. Besonders vorteilhaft kann ein Berührungsdrucksensor in Fig. 1 als Schaltband verwendet werden, besonders in gefährdeten Räumen. Wird ein derartiges Schaltband an den Wänden des Raumes verlegt, ist es möglich, an jeder Stelle des Raumes das Schaltband zu berühren und mit den so erzeugten aktiven elektrischen Signalen eine Not-Aus-Funktion, etwa für in dem Raum befindliche Anlagen, zu erzeugen. Selbstverständlich kann ein derartiges Schaltband auch für andere elektrische Funktionen, beispielsweise zur Betätigung der Beleuchtung oder zum Ingangsetzen von elektrischen Apparaturen aller Art verwendet werden.Description of the exemplary embodiments The first shown in FIG Embodiment of a contact pressure sensor according to the invention is according to Art of a coaxial cable. It is located between an outer contact layer 10 and an inner contact layer 11, which is comparable to a center conductor, an intermediate layer 12 as a dielectric. As shown, it becomes the outer contact layer grounded, a signal can be transmitted to the inner contact layer 11 via an amplifier 13 then removed when pressure is applied to the touch pressure sensor. When a force acts on the contact pressure sensor, there is a mutual Influencing the bound electrostatic Surface charge, so that between the outer contact layer 10 and the inner contact layer 11 an active electrical signal can be removed. This signal can be used in the following Amplifier 13 are processed and displayed in a manner known per se. Particularly Advantageously, a contact pressure sensor in Fig. 1 can be used as a switching band, especially in endangered areas. If such a switching tape on the walls of the If the room is moved, it is possible to touch the switching strip at any point in the room and with the active electrical signals generated in this way, an emergency stop function, for example for systems located in the room. Of course, such a thing can be Switching band also for other electrical functions, for example for actuation used for lighting or for starting up electrical equipment of all kinds will.

Ein zweites Ausführungsbeispiel eines erfindungsgemäßen Berührungsdrucksensors ist in Fig. 2 dargestellt. Der Berührungsdrucksensor entsprechend Fig. 2 hat die Form einer Sensormatte, bei der an der Ober- und Unterseite eine obere bzw.A second embodiment of a touch pressure sensor according to the invention is shown in FIG. The contact pressure sensor according to FIG. 2 has the In the form of a sensor mat with an upper or lower surface on the top and bottom.

untere Kontaktschicht 14, 15 angebracht ist, zwischen denen sich das Dielektrikum als Zwischenschicht 12 befindet.lower contact layer 14, 15 is attached, between which the Dielectric is located as an intermediate layer 12.

Selbstverständlich kann die Sensormatte entsprechend Fig. 2 zum Schutz gegen Umwelteinflüsse wie Verschmutzung und Nässe noch durch weitere, in der Zeichnung nicht dargestellte Schichten geschützt sein.Of course, the sensor mat according to FIG. 2 can be used for protection Against environmental influences such as dirt and moisture even further, in the drawing layers not shown be protected.

Eine Sensormatte der beschriebenen Art eignet sich insbesondere als Überwachungsmelder für das Betreten gefährdeter Räume, wobei es weiterhin möglich ist, den gefährdeten Raum in geeignete Abschnitte zu unterteilen, so daß ein selektives Erkennen des Ortes möglich ist, an dem der Raum betreten wurde. Weiterhin kann die beschriebene Sensormatte als Geber für automatische Türen verwendet werden.A sensor mat of the type described is particularly suitable as Monitoring detectors for entering endangered rooms, whereby it is still possible is to divide the endangered space into suitable sections, so that a selective Recognizing the location is possible at which to enter the room became. Furthermore, the described sensor mat can be used as a transmitter for automatic doors will.

In einer weiteren bevorzugten Ausführungsform der Erfindung wird das erzeugte Berühungsdrucksensor-Signal Schaltmitteln zugeführt, die Stufen 16, 17 zur Unterscheidung vorbestimmter Signalamplituden aufweisen, denen jeweils Zählerstufen 18, 19 nachgeschaltet sind. Eine Sensormatte mit einer derartigen Auswerteschaltung kann in vorteilhafter Weise verwendet werden, um bei Meß- und Sortiervorgängen aufprallende Teile hinsichtlich ihrer Zahl und ihres Gewichtes unterscheiden zu können.In a further preferred embodiment of the invention, the The generated contact pressure sensor signal is supplied to switching means, the stages 16, 17 to distinguish between predetermined signal amplitudes, each of which has counter stages 18, 19 are connected downstream. A sensor mat with such an evaluation circuit can be used in an advantageous manner to prevent bouncing during measuring and sorting processes To be able to distinguish parts in terms of their number and weight.

Claims (9)

Ansprüche Berührungsdrucksensor mit einem Dielektrikum und elektrischen Fühlern, denen elektronische Schaltmittel zur Erfassung des bei Druckeinwirkung zwischen den Fühlern abnehmbaren aktiven elektrischen Signales nachgeschaltet sind, dadurch gekennzeichnet, daß die elektrischen Fühler als äußere und innere Kontaktschichten (10, 11) und das Dielektrikum als Zwischenschicht (12) in der--Art eines Koaxialkabels ausgebildet sind.Claims contact pressure sensor with a dielectric and electrical Sensors, which have electronic switching means for detecting the pressure applied active electrical signals that can be detached are connected downstream between the sensors, characterized in that the electrical sensors are used as outer and inner contact layers (10, 11) and the dielectric as an intermediate layer (12) in the - type of a coaxial cable are trained. 2. Verwendung eines Berührungsdrucksensors nach Anspruch 1 als Schaltband in Räumen, vorzugsweise mit Not-Aus-Funktion.2. Use of a contact pressure sensor according to claim 1 as a switching band in rooms, preferably with an emergency stop function. 3. Berührungsdrucksensor mit einem Dielektrikum und elektrischen Fühlern, denen elektronische Schaltmittel zur Erfassung des bei Druckeinwirkung zwischen den Fühlern abnehmbaren aktiven elektrischen Signals nachgeschaltet sind, dadurch gekennzeichnet, daß die elektrischen Fühler als obere und untere Kontaktschicht (14, 15) und das Dielektrikum als Zwischenschicht (12) einer Sensormatte ausgebildet sind.3. Contact pressure sensor with a dielectric and electrical sensors, where electronic switching means for detecting the pressure between the detachable active electrical signal is connected downstream of the sensors, through this characterized in that the electrical sensor is used as an upper and lower contact layer (14, 15) and the dielectric as an intermediate layer (12) of a sensor mat are. 4. Verwendung eines Berührungsdrucksensors nach Anspruch 3 als Überwachungsmelder für das Betreten gefährdeter Räume.4. Use of a contact pressure sensor according to claim 3 as a monitoring alarm for entering endangered rooms. 5. Verwendung eines Berührungsdrucksensors nach Anspruch 3 als Geber für automatische Türen.5. Use of a contact pressure sensor according to claim 3 as a transmitter for automatic doors. 6. Berührungsdrucksensor nach Anspruch 3, dadurch gekennzeichnet, daß die Schaltmittel Stufen (16, 17) zur Unterscheidung vorbestimmter Signalamplituden aufweisen, denen jeweils Zählstufen (18, 19) nachgeschaltet sind.6. Touch pressure sensor according to claim 3, characterized in that that the switching means stages (16, 17) for differentiating predetermined signal amplitudes have, each of which counting stages (18, 19) are connected downstream. 7. Verwendung eines Berührungsdrucksensors nach Anspruch 6 zur Unterscheidung und Zählung aufprallender Teile unterschiedlichen Gewichtes.7. Use of a contact pressure sensor according to claim 6 for differentiation and counting impacting parts of different weights. 8. Berührungsdrucksensor nach einem der Ansprüche 1, 3 und 6, dadurch gekennzeichnet, daß als Dielektrikum Teflon verwendet wird.8. Contact pressure sensor according to one of claims 1, 3 and 6, characterized characterized in that Teflon is used as the dielectric. 9. Berührungsdrucksensor nach einem der Ansprüche 1, 3 und 6, dadurch gekennzeichnet, daß als Dielektrikum Polyvinylidenfluorid verwendet wird.9. Contact pressure sensor according to one of claims 1, 3 and 6, characterized characterized in that polyvinylidene fluoride is used as the dielectric.
DE19803006620 1980-02-22 1980-02-22 Contact pressure sensor - with dielectric enclosed between two contact layers Ceased DE3006620A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803006620 DE3006620A1 (en) 1980-02-22 1980-02-22 Contact pressure sensor - with dielectric enclosed between two contact layers

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Application Number Priority Date Filing Date Title
DE19803006620 DE3006620A1 (en) 1980-02-22 1980-02-22 Contact pressure sensor - with dielectric enclosed between two contact layers

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DE3006620A1 true DE3006620A1 (en) 1981-09-03

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232947A2 (en) * 1986-02-10 1987-08-19 Dale C. Jenkins, Jr. Method and apparatus for signaling attempted suicide
DE3606836A1 (en) * 1986-03-03 1987-09-10 Felten & Guilleaume Energie Waveguide sensor for tensile forces and a measuring device therefore
EP0317457A1 (en) * 1987-11-20 1989-05-24 Bollore Protection Technical textile structure for the detection and conversion of a pressure variation into an electric signal
DE3920957A1 (en) * 1989-06-27 1991-01-10 Bodenseewerk Geraetetech Piezoelectric foil as appts. coating - surrounds appts. completely and responds to touching contact
NL1004487C2 (en) * 1996-11-11 1998-05-14 Erik Leonard Van Vliet Security apparatus protecting e.g. floor space, with fewer false alarms
WO2003056287A1 (en) * 2001-12-21 2003-07-10 Danfoss A/S Dielectric actuator or sensor structure and method of making it
WO2004073518A1 (en) * 2003-02-18 2004-09-02 European Technology For Business Limited Oesophageal sphincter sensor
US7400080B2 (en) 2002-09-20 2008-07-15 Danfoss A/S Elastomer actuator and a method of making an actuator
US7732999B2 (en) 2006-11-03 2010-06-08 Danfoss A/S Direct acting capacitive transducer
DE102009017842A1 (en) * 2009-04-17 2010-10-28 Siemens Aktiengesellschaft Method for performing emergency cutout of e.g. lithotripter, involves comparing measurement values with each other, and switching off electrically controlled system when measurement values are identical to parameter
US7868221B2 (en) 2003-02-24 2011-01-11 Danfoss A/S Electro active elastic compression bandage
US7880371B2 (en) 2006-11-03 2011-02-01 Danfoss A/S Dielectric composite and a method of manufacturing a dielectric composite
US8181338B2 (en) 2000-11-02 2012-05-22 Danfoss A/S Method of making a multilayer composite
US8891222B2 (en) 2012-02-14 2014-11-18 Danfoss A/S Capacitive transducer and a method for manufacturing a transducer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1916496A1 (en) * 1968-04-04 1969-11-06 Nat Res Dev Capacitor and its application
GB1280178A (en) * 1969-09-19 1972-07-05 Bissett Berman Corp Transducer system
DE2903141A1 (en) * 1978-01-31 1979-08-02 Jarder PRESSURE SENSITIVE DEVICE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1916496A1 (en) * 1968-04-04 1969-11-06 Nat Res Dev Capacitor and its application
GB1280178A (en) * 1969-09-19 1972-07-05 Bissett Berman Corp Transducer system
DE2903141A1 (en) * 1978-01-31 1979-08-02 Jarder PRESSURE SENSITIVE DEVICE

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232947A3 (en) * 1986-02-10 1989-01-18 Dale C. Jenkins, Jr. Method and apparatus for signaling attempted suicide
EP0232947A2 (en) * 1986-02-10 1987-08-19 Dale C. Jenkins, Jr. Method and apparatus for signaling attempted suicide
DE3606836A1 (en) * 1986-03-03 1987-09-10 Felten & Guilleaume Energie Waveguide sensor for tensile forces and a measuring device therefore
EP0317457A1 (en) * 1987-11-20 1989-05-24 Bollore Protection Technical textile structure for the detection and conversion of a pressure variation into an electric signal
FR2623632A1 (en) * 1987-11-20 1989-05-26 Bollore Protection TECHNICAL TEXTILE STRUCTURE OF CAPTATION AND CONVERSION OF A PRESSURE VARIATION INTO AN ELECTRICAL SIGNAL
DE3920957A1 (en) * 1989-06-27 1991-01-10 Bodenseewerk Geraetetech Piezoelectric foil as appts. coating - surrounds appts. completely and responds to touching contact
NL1004487C2 (en) * 1996-11-11 1998-05-14 Erik Leonard Van Vliet Security apparatus protecting e.g. floor space, with fewer false alarms
US8181338B2 (en) 2000-11-02 2012-05-22 Danfoss A/S Method of making a multilayer composite
WO2003056287A1 (en) * 2001-12-21 2003-07-10 Danfoss A/S Dielectric actuator or sensor structure and method of making it
US7785905B2 (en) 2001-12-21 2010-08-31 Danfoss A/S Dielectric actuator or sensor structure and method of making it
US7895728B2 (en) 2002-09-20 2011-03-01 Danfoss A/S Method of making a rolled elastomer actiuator
US7400080B2 (en) 2002-09-20 2008-07-15 Danfoss A/S Elastomer actuator and a method of making an actuator
WO2004073518A1 (en) * 2003-02-18 2004-09-02 European Technology For Business Limited Oesophageal sphincter sensor
US7868221B2 (en) 2003-02-24 2011-01-11 Danfoss A/S Electro active elastic compression bandage
US7880371B2 (en) 2006-11-03 2011-02-01 Danfoss A/S Dielectric composite and a method of manufacturing a dielectric composite
US7732999B2 (en) 2006-11-03 2010-06-08 Danfoss A/S Direct acting capacitive transducer
DE102009017842B4 (en) * 2009-04-17 2010-12-30 Siemens Aktiengesellschaft Method and device for emergency shutdown of an electrically controlled system and medical device with such a device
DE102009017842A1 (en) * 2009-04-17 2010-10-28 Siemens Aktiengesellschaft Method for performing emergency cutout of e.g. lithotripter, involves comparing measurement values with each other, and switching off electrically controlled system when measurement values are identical to parameter
US8891222B2 (en) 2012-02-14 2014-11-18 Danfoss A/S Capacitive transducer and a method for manufacturing a transducer

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