SE537096C2 - Wireless sensor for measuring hydraulic pressure - Google Patents
Wireless sensor for measuring hydraulic pressure Download PDFInfo
- Publication number
- SE537096C2 SE537096C2 SE1351160A SE1351160A SE537096C2 SE 537096 C2 SE537096 C2 SE 537096C2 SE 1351160 A SE1351160 A SE 1351160A SE 1351160 A SE1351160 A SE 1351160A SE 537096 C2 SE537096 C2 SE 537096C2
- Authority
- SE
- Sweden
- Prior art keywords
- sensor
- circuit
- contacts
- housing
- battery
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0061—Electrical connection means
- G01L19/0084—Electrical connection means to the outside of the housing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/141—Monolithic housings, e.g. molded or one-piece housings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
537 096 Sammandrag Foreliggande uppfinning hanfor sig till en sensor (100) fer matning av ett hydrauliskt tryck i en hydraulisk kammare, varvid sensorn (100) innefattar ett hOlje (102) som har ett andparti (124) som är genomtrangligt for radiosignaler, en krets (106, 300) som ar placerad inuti hOljet (102), varvid kretsen (106, 300) innefattar en tryckmatare (104) for rnatning av det hydrauliska trycket i den hydrauliska kammaren, en tradlos kommunikationsenhet (110) som ar anordnad for all komrnunicera data som hanfor sig till det hydrauliska trycket i den hydrauliska kammaren, ett batten i (108, 306) som ar anordnat fOr att stromforsorja sensorn (100), ett flertal kontakter (114, 302) som ar anordnade for att Ora galvanisk kontakt med yttre kretsanordning (500, 600), varvid kretsen (106, 300) ar anordnad att vara omkopplingsbar mellan ett fOrsta tillstang och ett andra tillstand, varvid I det fOrsta tillstandet sa ar kretsen (106, 300) anordnad pa sa satt att namnda flertalet kontakter (114, 302) ar satta till att uppvisa samma elektriska potential och i det andra tillstandet sá ar kretsen (106, 300) anordnad pa sa satt att minst en fOrsta av namnda flertalet kontakter (114, 302) är satt till att uppvisa en olik elektrisk potential relativt en andra av namnda flertalet kontakter (114, 302). The present invention relates to a sensor (100) for supplying a hydraulic pressure in a hydraulic chamber, the sensor (100) comprising a housing (102) having a duct portion (124) which is permeable to radio signals, a circuit (106, 300) located inside the housing (102), the circuit (106, 300) comprising a pressure feeder (104) for relieving the hydraulic pressure in the hydraulic chamber, a wireless communication unit (110) provided for all communication. data relating to the hydraulic pressure in the hydraulic chamber, a bath in (108, 306) arranged to supply power to the sensor (100), a plurality of contacts (114, 302) arranged to make galvanic contact with external circuit device (500, 600), wherein the circuit (106, 300) is arranged to be switchable between a first state and a second state, wherein in the first state the circuit (106, 300) is arranged in such a way that said plurality of contacts (114, 302) are set to exhibit the same electrical potential and in the second state the circuit (106, 300) is arranged so that at least one first of said plurality of contacts (114, 302) is set to exhibit a different electrical potential relative to a second of said plurality of contacts (114, 302).
Description
537 096 TRADLOS SENSOR FOR MATNING AV ETT HYDRAULISKT TRYCK Tekniskt ornrade Foreliggande uppfinning hanfor sig till en sensor for matning av ett hydrauliskt tryck i en hydraulisk kammare. TECHNICAL FIELD The present invention relates to a sensor for feeding a hydraulic pressure into a hydraulic chamber.
Uppfinnindens bakdrund Hydraulik är frekvent anvant for alstring, reglering och transmission av kraft genom anvandning av trycksatta vatskor i hydrauliska kammare. Hydrauliska system innefattar en eller flera hydrauliska kammare for upphangning och noggrann lagesinstallning av systemelement i relation till varandra, t.ex. hydroinfastningar, hydrobussningar eller lagerelement. Ett exempel pa ett sadant system är anslutning av en chuck till en drivaxel hos ett roterande maskinverktyg sa som ett klippverktyg, en borr eller en verktygshallare. Laget hos chucken parallellt med och/eller vinkelraft mot rotationsaxeln hos det roterande maskinverktyget regleras av krafter som overfors fran chucken, vilket i sin tur bestams av storleken pa hydrauliskt tryck i en eller flera hydrauliska kammare inuti chucken. Background of the Invention Hydraulics is frequently used for generating, regulating and transmitting power through the use of pressurized water shoes in hydraulic chambers. Hydraulic systems include one or more hydraulic chambers for suspension and accurate layer installation of system elements in relation to each other, e.g. hydro fasteners, hydro bushes or bearing elements. An example of such a system is the connection of a chuck to a drive shaft of a rotating machine tool such as a cutting tool, a drill or a tool holder. The bearing of the chuck parallel to and / or angular force against the axis of rotation of the rotary machine tool is controlled by forces transmitted from the chuck, which in turn is determined by the magnitude of hydraulic pressure in one or more hydraulic chambers inside the chuck.
For att sakerstalla korrekt funktion hos det hydrauliska systemet sa är det viktigt att mata trycket inuti den hydrauliska kammaren. Sensorer som innefattar tryckmatare anordnas dal-for atminstone delvis inuti tryckkammaren for matning av det hydrauliska trycket. Det ar emellertid problematiskt att fa atkomst till data som hanfor sig till det hydrauliska trycket eftersom sensorn i manga situationer är anordnad i tunga maskiner eller inuti ett maskinverktyg. Eftersom sensorerna ofta är gomda sa sker krafttillfOrsel till sensorn och/eller kommunikation av data som hard& sig till det hydrauliska trycket i den hydrauliska kammaren med fordel via elektriska kablar som via glidkontakter är i kontakt med sensorn. FOr hydrauliska system som till exempel innefattar delar som roterar med hog hastighet är inte detta en optimal losning. For denna typ av system är det svart att bibehalla en verksam elektrisk kontakt. Dessutom sá kan varmealstring vid eller i narheten av kontakterna red ucera prestandan hos sensorn och/eller tillforlitligheten hos datakommunikationen med sensorn. Vidare sa kan den milyi som omger sensorerna innehalla oljelackage, elektriskt ledande rester och/eller vatskor som kan stora prestandan hos kontakterna, inducerar kemiska reaktioner i narheten av sensorn eller till och med kortslutning av sensorn. 1 537 096 Det ar darfOr Onskvart att fjarratkomma data som hanfOr sig till det hydrauliska trycket i den hydrauliska kammaren. Detta kan astadkommas genom anvandning av tradlos kommunikation. En sacian losning kraver emellertid en intern kraftkalla sasom ett batten i i sensorn, vilket begransar livslangden hos sensorn. In order to ensure proper operation of the hydraulic system, it is important to supply the pressure inside the hydraulic chamber. Sensors comprising pressure feeders are arranged down at least partially inside the pressure chamber for supplying the hydraulic pressure. However, it is problematic to access data which is related to the hydraulic pressure because in many situations the sensor is arranged in heavy machines or inside a machine tool. Since the sensors are often glued, power is supplied to the sensor and / or communication of data which hardens to the hydraulic pressure in the hydraulic chamber is advantageously via electrical cables which are in contact with the sensor via sliding contacts. For hydraulic systems that, for example, include parts that rotate at high speed, this is not an optimal solution. For this type of system, it is difficult to maintain an effective electrical contact. In addition, heat generation at or near the contacts may reduce the performance of the sensor and / or the reliability of the data communication with the sensor. Furthermore, the environment surrounding the sensors may contain oil leaks, electrically conductive debris and / or water shoes which can increase the performance of the contacts, induce chemical reactions near the sensor or even short circuit the sensor. 1 537 096 It is therefore advisable to remotely access data which is available to the hydraulic pressure in the hydraulic chamber. This can be accomplished through the use of wireless communication. However, a sacian detachment requires an internal force source such as a batten in the sensor, which limits the life of the sensor.
Sammanfattning av upplaningtn Eft andamal med fareliggande uppfinning är aft lOsa eller atminstone minska problemen som namns ovan, I synnerhet I enligt med en forsta aspekt av fOreliggande uppfinning tillhandahalls en sensor for rnatning av ett hydrauliskt tryck i en hydraulisk kammare, varvid sensorn innefattar ett hOlje som har ett andparti som ar genomtrangligt for radiosignaler, en krets som ãr placerad inuti hOljet, varvid kretsen innefaftar en trycknnatare fOr ma'tning av det hydrauliska trycket i den hydrauliska kammaren, en tradlOs kommunikationsenhet som är anordnad far att kommunicera data som hanfor sig till det hydrauliska trycket i den hydrauliska kammaren, eft batted som är anordnat for aft strOmforstirja sensorn, ett flertal kontakter som är anordnade for att Ora galvanisk kontakt med yttre kretsanordning, varvid kretsen är anordnad att vara omkopplingsbar mellan ett forsta tillstang och ett andra tillstand, varvid i det fOrsta tillstandet sa är kretsen anordnad pa sa satt att namnda flertalet kontakter är satta till att uppvisa samma elektriska potential och i det andra tillstandet sa är kretsen anordnad pa sa satt aft minst en forsta av namnda flertalet kontakter är satt till att uppvisa en olik elektrisk potential relativt en andra av namnda flertalet kontakter. SUMMARY OF THE PLANNING The object of the present invention is to solve or at least reduce the problems mentioned above, in particular according to a first aspect of the present invention there is provided a sensor for maintaining a hydraulic pressure in a hydraulic chamber, the sensor comprising a housing which has a duct portion which is permeable to radio signals, a circuit located inside the housing, the circuit comprising a pressure knob for measuring the hydraulic pressure in the hydraulic chamber, a wireless communication unit which is arranged to communicate data which it carries to it. hydraulic pressure in the hydraulic chamber, after batted which is arranged to actuate the sensor, a plurality of contacts arranged to make galvanic contact with external circuit device, the circuit being arranged to be switchable between a first state and a second state, wherein in the first state so is the circuit arranged on so s that said plurality of contacts are set to exhibit the same electrical potential and in the second state the circuit is arranged so that at least one first of said plurality of contacts is set to exhibit a different electrical potential relative to a second of said plurality of contacts.
I kontexten av foreliggande uppfinning sa ska termen radio tolkas som en elektromagnetisk vag som har en frekvens I radiofrekvensomradet, d.v.s. fran ca 30 kHz till 300 GHz. Exempel pa vanliga standarder for tradlos kommunikation som utnyttjar radio vagor är ZigBee och Bluetooth. ZigBee är en tradlOs masknatverksstandard av lag effekt som opererar i de industriella, vetenskapliga och medicinska (ISM) radiobanden; 868 MHz i Europa, 915 MHz i USA och Australien och 2,4 GHz i andra jurisdiktioner Over varlden. Bluetooth anvander ocksa kortvagig radiotransmission i ISM-banden. Fackmannen inser att aven andra standarder for tradlos kommunikation kan anvandas I enlighet med foreliggande uppfinning. In the context of the present invention, the term radio is to be interpreted as an electromagnetic wave having a frequency in the radio frequency range, i.e. from about 30 kHz to 300 GHz. Examples of common standards for wireless communication that use radio scales are ZigBee and Bluetooth. ZigBee is a tradlOs worm network standard of law power operating in the industrial, scientific and medical (ISM) radio bands; 868 MHz in Europe, 915 MHz in the US and Australia and 2.4 GHz in other jurisdictions worldwide. Bluetooth also uses shortwave radio transmission in ISM bands. Those skilled in the art will appreciate that other standards for wireless communication may also be used in accordance with the present invention.
Texten ett andparti SOM är genomtrangiigt fejt' radiosignaler ska forstas sa som all materialet hos andpartiet kan valjas sa aft det tillater att radiovagor 2 537 096 utbreder sig genom materialet utan full dampning av amplituderna hos radiovagorna. Radiovagor som innehaller information kan darfor fortsatta att utbreda sig efter passage genom andpartiet pa sa satt att information kan overforas genom andpartiet. The text is a duck portion WHICH is transversely bold. Radio signals must be understood as all the material of the duck portion can be selected so as to allow radio waves to propagate through the material without full evaporation of the amplitudes of the radio waves. Radio waves containing information can therefore continue to propagate after passage through the duct in such a way that information can be transmitted through the duck.
Yttre kretsanordning ska fOrstas som en laddare, en initieringsnyckel, testutrustning eller annan elektronisk anordning som är i stand till all kommunicera med kretsen hos sensorn via en eller flera av nannnda flertalet kontakter. External circuitry is to be understood as a charger, an initiation key, test equipment or other electronic device capable of all communicating with the circuit of the sensor via one or more of the said plurality of contacts.
Genom att anordna sensor sa att den är omkopplingsbar mellan ett fOrsta och ett andra tillstand sa är det mojligt att till exempel ladda batteriet hos sensorn eller att stanga av och pa sensorn genom anvandning av namnda flertalet kontakter. For att ladda batteriet och for vissa tillampning av att stanga av och satta pa sensorn sa nnaste emellertid kontakterna hos sensorn ha olika elektrisk potential. Men i det fall namnda flertalet kontakter hos sensorn under drift i hydrauliska system är satta att ha olika potential sa kan problem beroende pa oljelackage, elektriskt ledande rester och/eller vatskor som kan kortsluta sensorn uppsta. Emellertid beroende pa formagan att kunna vaxla kretsen mellan det forsta och det andra tillstandet sa erhalls en effektiv sensor som har en fOrbattrad livstid. Det är darfor frirdelaktigt att sensorn är omkopplingsbar till det andra tillstandet vilket tillhandahaller effektiv laddning, ingangsattning eller elektrisk kommunikation med sensorn som kraver minst en potentialskillnad bland namnda flertalet kontakter. By arranging the sensor so that it is switchable between a first and a second state, it is possible, for example, to charge the battery of the sensor or to switch the sensor on and off by using the said plurality of contacts. However, in order to charge the battery and for some application of switching off and on the sensor, the contacts of the sensor have different electrical potential. However, in the event that the aforementioned majority of contacts of the sensor during operation in hydraulic systems are set to have different potential, problems due to oil leakage, electrically conductive residues and / or water shoes that can short-circuit the sensor may arise. However, depending on the ability to switch the circuit between the first and second states, an efficient sensor is obtained which has an improved service life. It is therefore advantageous that the sensor is switchable to the second state which provides efficient charging, input or electrical communication with the sensor which requires at least one potential difference among said plurality of contacts.
Batteriet kan vara laddningsbart och namnda flertalet kontakter kan vara anordnade att Ora galvanisk kontakt med namnda yttre kretsanordning pa sa satt att laddning av batteriet mojliggors. The battery may be rechargeable and said plurality of contacts may be arranged to make galvanic contact with said external circuitry so as to allow charging of the battery.
Det ar fOrdelaktigt att batteriet hos en sensor är laddningsbart eftersom detta frirlanger livstiden hos sensorn. Vidare red ucerar detta antalet delar has sensorn eftersom denna typ av anordning inte erfordrar aft batteriet är lristagbart monterat till eller lostagbart fastsatt inuti holjet has sensorn. It is advantageous that the battery of a sensor is rechargeable as this extends the life of the sensor. Furthermore, this reduces the number of parts the sensor has because this type of device does not require that the battery be removably mounted to or removably attached inside the housing of the sensor.
Eftersom kontakterna has sensorn per se behriver vara i elektrisk kontakt med det laddbara batteriet sa okar den dartill forknippade potentialskillnaden mellan namnda flertalet kontakter risken for kortslutning av kretsen inuti sensorn och kemiska reaktioner sasom t.ex. oxidation uppstar vid dessa kontakter. Since the contacts have the sensor per se need to be in electrical contact with the rechargeable battery, the associated potential difference between the said majority of contacts increases the risk of short circuit of the circuit inside the sensor and chemical reactions such as e.g. oxidation occurs at these contacts.
Den i det forsta tillstandet gemensamma potentialen for alla kontakterna minskar dessa och andra problem som kan tillskrivas milfrin som sensorn befinner sig I, d.v.s. den minimerade potentialskillnaden 'bland 3 537 096 namnda flertalet kontakter reducerar problemen som kan tillskrivas lackstrammar, kortslutning, oxidation eller kemiska reaktioner som skapar slitage pa eller som forst& kontakterna eller sensorn. Foreliggande sensor kan salunda under anvandning utsattas far vatskor sasom vatten eller rengoringsmedel under till exempel rengoring av sensorn eller for olja, kemiska substanser och till och med ledande material sa som metallrester, vilka kan finnas inuti ett nnaskinverktyg. The common potential of all the contacts in the first state reduces these and other problems which can be attributed to the milfrin in which the sensor is located, i.e. the minimized potential difference among the aforementioned plurality of contacts reduces the problems attributable to paint tensions, short circuits, oxidation or chemical reactions which create wear on or which are the contacts or the sensor. The present sensor can thus, during use, be exposed to liquids such as water or detergents during, for example, cleaning the sensor or to oil, chemical substances and even conductive materials such as metal residues, which may be inside a machine tool.
Kretsen kan vara bojlig pa sa sat aft kretsen ar vikbar runt batteriet. Detta minskar mangden tomrum i haljet has sensorn vilket i sin tur leder till en 10 minskad storlek av sensorn. The circuit may be flexible so that the circuit is foldable around the battery. This reduces the amount of voids in the halter sensor, which in turn leads to a reduced size of the sensor.
Den tradlosa kommunikationsenheten kan vidare innefatta en bajlig antenn for sandning och/eller mottagning av radiosignaler. Detta är fordelaktigt storleksmassigt och mojliggor for optimering av laget has antennen inom sensorenheten. The wireless communication unit may further comprise a flexible antenna for transmitting and / or receiving radio signals. This is advantageous in size and makes it possible to optimize the layer of the antenna within the sensor unit.
Genonn att vidare anordna antennen är i narheten av andpartiet has holjet sa kan farbattrad transmission av radiosignaler till och fran sensorn erhallas. By further arranging the antenna is in the vicinity of the duck portion has been housed so that improved transmission of radio signals to and from the sensor can be obtained.
Andpartiet has holjet kan vara gjort av ett glas-, ett keram- eller ett plastmaterial eftersom detta farbattrar tranmissionen av radiosignaler till och 20 fran sensorn. The duct portion of the housing may be made of a glass, ceramic or plastic material as this enhances the transmission of radio signals to and from the sensor.
Holjet kan innefatta ett gangat pat for fastsattning av sensorn i den hydrauliska kammaren. Detta majliggor aft sensorn kan skruvas fast i ett gangat urtag i en hydraulisk kammare, varigenom sensorn är lastagbart fast till den hydrauliska kammaren. 25ljet kan vidare innefatta ett flertal spar som är anordnade pa sa satt att holjet kan positioneras pa ett fbrutbestamt satt i forhallande till namnda yttre kretsanordning och/eller pa sa satt att en adapter som anvands for fastsattning av sensorn i den hydrauliska kammaren är lostagbart ingreppbar med haljet. Denna uppstallning minskar mangden material i narheten av andpartiet has sensorn. The housing may comprise a perforated path for attaching the sensor to the hydraulic chamber. This girder of the sensor can be screwed into a perforated recess in a hydraulic chamber, whereby the sensor is loadable to the hydraulic chamber. The body may further comprise a plurality of grooves arranged in such a way that the housing can be positioned in a predetermined manner in relation to said outer circuit device and / or in such a way that an adapter used for attaching the sensor in the hydraulic chamber is releasably engageable with haljet. This arrangement reduces the amount of material in the vicinity of the duck portion having the sensor.
Holjet kan atminstone delvis vara gjort av metal, vilket tillhandahaller ett starkt och robust holje som mekaniskt skyddar de inre delarna av sensorn. The housing can be at least partly made of metal, which provides a strong and robust housing that mechanically protects the inner parts of the sensor.
Vaxling av kretsen kan initieras av nannnda yttre kretsanordning. Detta är fardelaktigt eftersom kretsen kan sattas i det forsta eller det andra tillstandet beroende pa utformningen av den yttre kretsanordningen. Kontakterna kan vara anordnade pa sa satt att ett parti has varje kontakt stracker sig genom andpartiet has haljet. Detta tillhandahaller enkel 4 537 096 access till namnda flertalet kontakter och mojliggor vidare effektiv galvanisk kontaktering av sensorn och den yttre kretsanordningen. Switching of the circuit can be initiated by said external circuit device. This is advantageous because the circuit can be set in the first or the second state depending on the design of the external circuit device. The contacts can be arranged in such a way that a portion has each contact extending through the duck portion has the neck. This provides easy access to said plurality of contacts and further enables efficient galvanic contacting of the sensor and the external circuitry.
Andra fordelar och nya sardrag hos uppfinningen kommer att synliggOras i den efterfaljande detaljerade beskrivningen av utforingsexempel 5 av uppfinningen under betraktande i farening med de medfaljande ritningarna och kraven. Other advantages and novel features of the invention will become apparent from the following detailed description of exemplary embodiments of the invention when considered in conjunction with the accompanying drawings and claims.
Kcyt.beskrivnitlq av ritningarna Ovanstaende och andra aspekter av foreliggande uppfinning kommer nu att beskrivas mer i detalj, med hanvisning till de bifogade ritningarna, som visar utforingsformer av uppfinningen. Siffrorna bar inte betraktas som begransande far uppfinningen till den specifika utforingsformen; istallet anvands de far att fOrklara och farsta uppfinningen. Sasom illustreras i figurema har storlekar av skikt och regioner overdrivits illustrerande syfte och salunda tillhandahalls for att illustrera de allmanna strukturerna hos utforingsformer av den foreliggande uppfinningen. Genomgaende hanvisar samma hanvisningssiffror till sarnma element. Description of the Drawings The above and other aspects of the present invention will now be described in more detail, with reference to the accompanying drawings, which show embodiments of the invention. The figures should not be construed as limiting the invention to the specific embodiment; instead, they are used to explain and understand the invention. As illustrated in the figures, sizes of layers and regions have been exaggerated for illustrative purposes and are thus provided to illustrate the general structures of embodiments of the present invention. Throughout, he refers the same male reference numbers to similar elements.
FIG. 1 ar ett schematiskt diagram av en sensor for matning av det hydrauliska trycket i en hydraulisk kammare enligt en utforingsform av uppfinningen. FIG. 1 is a schematic diagram of a sensor for supplying the hydraulic pressure in a hydraulic chamber according to an embodiment of the invention.
FIG. 2 ar en sidovy i perspektiv, som visar en sensor i ett monterat tillstand enligt en utfaringsform av foreliggande uppfinning, FIG. 3 ar en sidovy i perspektiv, som visar en adapter far fixering av sensorn enligt Fig. 2. FIG. 2 is a side perspective view showing a sensor in an assembled condition according to an embodiment of the present invention, FIG. Fig. 3 is a side view in perspective, showing an adapter for fixing the sensor according to Fig. 2.
FIG. 4 ar ett schematiskt kretsschema av en utfaringsform av en krets i 25 en sensor i enlighet med foreliggande uppfinning. FIG. 4 is a schematic circuit diagram of an embodiment of a circuit in a sensor in accordance with the present invention.
FIG. 5 är ett schematiskt kretsschema av en utfaringsforrn av en yttre kretsanordning i enlighet med foreliggande uppfinning. FIG. 5 is a schematic circuit diagram of an embodiment of an external circuit device in accordance with the present invention.
FIG. 6 ar ett schematiskt kretsschema av en utforingsform av en yttre kretsanordning i enlighet med foreliggande uppfinning, Beskrivning av utforingsexempel Foreliggande uppfinning kommer nu i det foljande att beskrivas mer fullstandigt med hanvisning till de bifogade ritningarna, i vilka for narvarande fOredragna utforingsformer av uppfinningen visas. Derma uppfinning kan emellertid utforas i manga olika former och skall inte tolkas som begransad till de utforingsformer som anges hari; snarare tillhandahalls dessa 537 096 utforingsformer far noggrannhet och fullstandighet, och far aft formedla uppfinningens ornfang till fackmannen. FIG. 6 is a schematic circuit diagram of an embodiment of an external circuit device in accordance with the present invention. Description of Embodiments The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these 537,096 embodiments are provided for accuracy and completeness, and are intended to convey the scope of the invention to those skilled in the art.
Den grundlaggande iden med denna uppfinning är att astadkomma en sensor som ãr anordnad sa att dess elektriska kontakter kan kopplas om mellan ett forsta tillstand, dar kontakterna ar installd pa att ha samma elektriska potential och ett andra tillstand, dar atminstone en forsta av namnda flertal kontakter är installd pa att ha en annan elektrisk potential i forhallande till en andra av namnda flertal kontakter. The basic idea of this invention is to provide a sensor which is arranged so that its electrical contacts can be switched between a first state, where the contacts are set to have the same electrical potential and a second state, where at least one first of said plurality of contacts is set to have a different electrical potential in relation to a second of said plurality of contacts.
Den gemensamma potential for alla kontakter, det forsta tillstandet, minskar problemen med den harda miljon som ofta kan omge sensorn, sensorn ger minskad risk for prestandaproblem samband med lackstrommar, kortslutningar, oxidation, eller andra kemiska reaktioner som orsakar slitage pa kontakterna eller skador pa sensorn. Salunda kan sensorn utsatts for vatten eller rengaringsmedel under till exempel rengaring av sensorn. Olja, kemiska amnen eller till och med ledande material, sasom rnetallrester kan aven vara narvarande vid anvandning av sensorn. Genom att stalla sensorn till det farsta tillstandet sa minskar problem som uppstar fran att vara i dessa miljoer. The common potential for all contacts, the first condition, reduces the problems with the hard million that can often surround the sensor, the sensor reduces the risk of performance problems associated with paint drums, short circuits, oxidation, or other chemical reactions that cause wear on the contacts or damage to the sensor . Thus, the sensor can be exposed to water or cleaning agents during, for example, cleaning the sensor. Oil, chemical substances or even conductive materials, such as metal residues, may also be present when using the sensor. By setting the sensor to the first state, the problems that arise from being in these environments are reduced.
Genom att vidare tillhandahalla en sensor som kan stallas om till det andra tillstandet sa kan en potentialskillnad inom namnda flertal kontakter erhallas, detta är fardelaktigt under till exempel laddning, initiering, eller avstangning av sensorn. By further providing a sensor which can be switched to the second state, a potential difference within said plurality of contacts can be obtained, this being dangerous during, for example, charging, initiating or shutting down the sensor.
Med hanvisning till ritningarna och i synnerhet till Fig. 1, Fig. 1 visar schematiskt en utfaringsform av sensorn 100. Sensorn 100 innefattar ett hus 102 och en tryckmatare 104 for matning av det hydrauliska trycket i en hydraulisk kammare. Vidare innefattar sensorn 100 en krets 106, ett batten i 108, en tradlos kommunikationsenhet 110 som har en antenn 112 samt eft flertal kontakter 114. Sensorn 100 kan ocksa vara forsedd med en processorenhet 116 och ett minne 118. Batteriet 108, den tradlasa kommunikationsenheten 110, namnda flertal kontakter och processorn kan betraktas som att vara en del av kretsen 106. Referring to the drawings and in particular to Fig. 1, Fig. 1 schematically shows an embodiment of the sensor 100. The sensor 100 comprises a housing 102 and a pressure feeder 104 for supplying the hydraulic pressure in a hydraulic chamber. Furthermore, the sensor 100 comprises a circuit 106, a batten 108, a wireless communication unit 110 having an antenna 112 and a plurality of contacts 114. The sensor 100 may also be provided with a processor unit 116 and a memory 118. The battery 108, the wireless communication unit 110 , said plurality of contacts and the processor can be considered to be part of the circuit 106.
Fig. 2 illustrerar en utferingsform av sensorn 100 i ett monterat tillstand, Sensorn är inrymd i ett halje 102, Holjet 102 innefattar ett fastparti 120, en kropp 122, och ett andparti 124. Fastpartiet 120 her en ganged del 126 som anordnad att skruvas fast i ett gangat urtagning i en hydraulisk kammare, varvid sensorn 100 är lbstagbart fast vid den hydrauliska kammaren. 6 537 096 Kroppen 122 innefattar ett flertal urtag 128, i vilka en adapter 200, se Fig. 3, far fastsattning av sensorn ar lostagbart fastbar sa att en tillracklig rotationskraft kan erhallas vid fastsattning av sensorn 100 i en hydraulisk kammare. Vidare ar namnda flertal av urtag 128 anordnade sa att haljet 102 kan vara placerat i ett farutbestamt forhallande med den yttre kretsar och/eller sa aft adaptern 200 anvandas far fastsattning av sensorn 100 i den hydrauliska kammaren ar lastagbart ingripbar med huset 102. Fig. 2 illustrates an embodiment of the sensor 100 in an assembled condition. The sensor is housed in a housing 102, the housing 102 includes a fixed portion 120, a body 122, and a duck portion 124. The fixed portion 120 has a ganged portion 126 arranged to be screwed in a recessed recess in a hydraulic chamber, the sensor 100 being removably attached to the hydraulic chamber. The body 122 comprises a plurality of recesses 128, in which an adapter 200, see Fig. 3, allows the attachment of the sensor to be releasably fastened so that a sufficient rotational force can be obtained when attaching the sensor 100 in a hydraulic chamber. Furthermore, said plurality of recesses 128 are arranged so that the housing 102 can be placed in a predetermined relationship with the external circuits and / or so that the adapter 200 is used to secure the sensor 100 in the hydraulic chamber is releasably engageable with the housing 102.
En fackman inom omradet inser att andra geometrier eller organ for fixering av sensorn 100 ocksa ar mOjliga. One skilled in the art will recognize that other geometries or means for fixing the sensor 100 are also possible.
Sensorns 100 kropp 122 ar med fordel gjord av en metal!, sasom rostfritt stal, for att ge ett starkt och robust holje 102 som mekaniskt skyddar de inre delarna av sensorn 100. En sadan utformning ar ocksa fordelaktig vid fastsattning av sensorn 100 i den hydrauliska kammaren.ljet 102 ar faretradesvis farseglat far att forhindra att vatskor och andra amnen far att tranga in i den inre volymen av sensorn 100. For att fixera och/eller skydda de inre delar I sensorn 100 fran vibrationer, fukt och korrosiva arnnen ar den inre volymen av haljet 102 fOretradesvis fylld med elektrisk ingjutningsblanding och inkapslingsmaterial sasom epoxi, silikon eller polymerer. The body 122 of the sensor 100 is advantageously made of a metal, such as stainless steel, to provide a strong and robust housing 102 which mechanically protects the inner parts of the sensor 100. Such a design is also advantageous when attaching the sensor 100 in the hydraulic chamber 102 is dangerously sealed to prevent liquids and other substances from penetrating the inner volume of the sensor 100. To fix and / or protect the inner parts of the sensor 100 from vibration, moisture and corrosive hearths, the inner the volume of the casing 102 is preferably filled with electrical casting compound and encapsulating materials such as epoxy, silicone or polymers.
En fackman inom teknikomradet inser att aven andra material kan anvandas far haljet 102 hos sensorn 100 sa val som for inkapslingen. Icke begransande exempel pa material som kan anvandas ar en keram eller en plast. One skilled in the art will recognize that other materials may be used for the housing 102 of the sensor 100 as well as for the encapsulation. Non-limiting examples of materials that can be used are a ceramic or a plastic.
Vidare ar andpartiet 124 genomtrangligt for radiosignaler, sasom kommer att diskuteras nedan. Namnda flertal kontakter 114 ar foretradesvis anordnade (ej visat) sa att en del av varje av namnda kontakter stracker sig genom andpartiet 124 av haljet 102, sá aft namnda flertalet kontakter 114 kan bringas i galvanisk kontakt med en yttre krets. Enligt denna utforingsform ar andpartiet 124 tillverkat av epoxi, som ar genomtrangligt for radiosignaler och visuellt transparent. Anvandningen av en visuellt transparent epoxi tillhandahaller att visuella indikeringsorgan, till exempel via en lysdiod, ger effektiv tillgang till information som hanfor sig till statusen hos sensorn 100. Den visuella indikeringen kan tillhandahalla laddningsnivan hos batteriet. Det bar noteras att andpartiet 124 kan i en annan utfaringsform besta av glas, en keram eller ett plastnnaterial, som är genomtrangligt for radiosignaler. Furthermore, the duct portion 124 is permeable to radio signals, which will be discussed below. Said plurality of contacts 114 are preferably arranged (not shown) so that a part of each of said contacts extends through the duct portion 124 of the housing 102, so that said plurality of contacts 114 can be brought into galvanic contact with an outer circuit. According to this embodiment, the duct portion 124 is made of epoxy, which is permeable to radio signals and visually transparent. The use of a visually transparent epoxy provides that visual indicating means, for example via an LED, provide efficient access to information which relates to the status of the sensor 100. The visual indication can provide the charge level of the battery. It should be noted that in another embodiment the duck portion 124 may consist of glass, a ceramic or a plastic material which is permeable to radio signals.
Andpartiet 124 kan innefatta ett visuellt opakt material sa lange som materialet hos andpartiet 124 ar genomtrangligt for radiosignaler. 7 537 096 FOr att effektivt utnyttja volymen inuti huset 102 är kretsen 106 foretradesvis gjord bojlig, sà att kretsen 106 ar vikbar runt batteriet 108. The duck portion 124 may comprise a visually opaque material as long as the material of the duck portion 124 is permeable to radio signals. To efficiently utilize the volume inside the housing 102, the circuit 106 is preferably made flexible so that the circuit 106 is foldable around the battery 108.
Det ar vidare fordelaktigt am den tradlosa kommunikationsenheten 110 innefattar en bojlig antenn 112 for sandning och/eller mottagning av radiosignaler. It is further advantageous if the wireless communication unit 110 comprises a flexible antenna 112 for transmitting and / or receiving radio signals.
Enligt en utfOringsform ar antennen 112 ar integrerad i ett styvt kretskort (PCB) som ar anordnat sá att antennen 112 bringas narhet av andpartiet 124 av holjet 102. Detta forbattrar effektiviteten hos antennen 112. Exempelvis kan antennen 112 limmas till andpartiet 124, I en alternativ utforingsform ar antennen 112 en tradantenn. According to one embodiment, the antenna 112 is integrated in a rigid circuit board (PCB) which is arranged so that the antenna 112 is brought close to the duct portion 124 of the housing 102. This improves the efficiency of the antenna 112. For example, the antenna 112 may be glued to the duct portion 124. embodiment, the antenna 112 is a traditional antenna.
Adaptern 200 for fastsattning ar schematiskt illustrerad i FIG. 3 . I den beskrivna utfOringsformen en anddel av adaptern 200 for fixering formad som en hexagonal mutter 202 . Det bor noteras att andpartiet av adaptern 200 for fixering kan vara av vilken form som heist, sasom innefattande ett hack, en rafflad mutter, eller en T- mutter, sa lange som en effektiv fastsattning av sensorn 100 i den hydrauliska kammaren kan tillhandahallas. Adaptern 200 for fixering innefattar vidare kantpartier 204 som ar anordnade sa att de passer in i namnda flertalet av urtag 128 pa. hOljet 102 hos sensorn 100 . En fordel med at ha namnda flertalet av urtag 128 pa huset 102 has sensorn 100 ar att mangden husmaterialet nara andsektionen 124 reduceras. Reduktionen av material reducerar skarmningen av signaler till och/eller fran antennen 112 och den tradlosa kommunikationsenheten 110 has sensorn 100. Salunda erhalls en fOrbattrad effektivt has den tradlbsa kornmunikationsenheten 110 for att kommunicera data till och/eller frail sensorn 100 vid anvandning av sensorn 100. Det bar dock papekas att i ett annat unrande sa kan kroppen 122 innefatta kantpartier och adaptern 200 for fixering kan omfatta motsvarande urtag. The attachment adapter 200 is schematically illustrated in FIG. 3. In the described embodiment, a portion of the adapter 200 for fixing is formed as a hexagonal nut 202. It should be noted that the end portion of the adapter 200 for fixing may be of any shape, such as including a notch, a knurled nut, or a T-nut, as long as an effective attachment of the sensor 100 to the hydraulic chamber can be provided. The adapter 200 for fixing further comprises edge portions 204 which are arranged to fit into said plurality of recesses 128 pa. housing 102 of the sensor 100. An advantage of having the said plurality of recesses 128 on the housing 102 having the sensor 100 is that the amount of housing material near the duck section 124 is reduced. The reduction in material reduces the shielding of signals to and / or from the antenna 112 and the wireless communication unit 110 has the sensor 100. Thus, an improved efficient has the wireless grain communication unit 110 for communicating data to and / or the frail sensor 100 when using the sensor 100. However, it should be noted that in another arrangement, the body 122 may include edge portions and the adapter 200 for fixing may include corresponding recesses.
Med hanvisning till FIG. 4 beskrivs i enlighet med foreliggande uppfinning en uttiringsform av sensoms 100 krets 300. Kretsen 300 innefattar ett flertal kontakter 302 betecknade Cl - 05, en omkopplare 304, ett batted 306, och ett flertal resistorer R1 - R2. Omkopplaren 304 är anordnad att vaxla mellan ett forsta tillstand och ett andra tillstand. I det forsta tillstandet ar omkopplaren 304 i ett lage A sa att potentialen i kontakt Cl ar satt till jord via motstandet R1. En potential V pa kontakten 02, foredraget mellan 3 - 5V, far omkopplaren 304 att vaxla till en position B, sa att kretsen 300 over* I det andra tillstandet. Det bor noteras att am ingen potential appliceras till kontakt 02 sa ar potentialen for kontakt C2 satt till jord via 8 537 096 motstandet R2. Kontakterna 03 - C5 ar satta till jord. Salunda kan denna krets 300, beroende pa ingangspotentialen pa C2 , vaxla mellan det fOrsta tillstandet och det andra tillstandet. I det forsta tillstandet ar namnda flertalet kontakter 302 satta att ha samma elektriska potential. I det andra tillstandet sa ar kretsen 300 anordnad sa att kontakt Cl ar satt aft ha en annan elektrisk potential An kontakterna 02 - C5. Det andra tillstandet ar darfOr anordnat sa att batteriet 306 och kontakten C1 star i elektrisk forbindelse vilket ger effektiv laddning av batteriet 306. Referring to FIG. 4, in accordance with the present invention, there is described an embodiment of the sensor 300 circuit 300. The circuit 300 includes a plurality of contacts 302 designated Cl - 05, a switch 304, a batted 306, and a plurality of resistors R1 - R2. The switch 304 is arranged to switch between a first state and a second state. In the first state, the switch 304 in a layer A is so that the potential in contact C1 is grounded via the resistor R1. A potential V on the contact 02, preferably between 3 - 5V, causes the switch 304 to switch to a position B, so that the circuit 300 exceeds * In the second state. It should be noted that if no potential is applied to contact 02 then the potential for contact C2 is grounded via resistor R2. Contacts 03 - C5 are grounded. Thus, depending on the input potential of C2, this circuit 300 may alternate between the first state and the second state. In the first state, said plurality of contacts 302 are set to have the same electrical potential. In the second state, the circuit 300 is arranged so that contact C1 is set to have a different electrical potential than contacts 02 - C5. The second condition is therefore arranged so that the battery 306 and the connector C1 are in electrical connection, which provides efficient charging of the battery 306.
Det bar noteras att omkopplaren 304 vidare ansluter kretsen 300 via Venekt for att drive sensorn 100. Genom detta arrangemang s stangs stromfarsorjningen for sensorn 100 av under laddning, under vilken batteriet 306 ar anslutet till kontakten Cl. Detta ar fordelaktigt eftersom en battre kontroll av uppladdningen av batteriet 306 erhalles och att energiforbrukningen hos sensorn nninimeras nar laddningen av sensorn 100 her avslutats. Sensom 100 kan omstartas nar sensorn 100 avlagsnas fran laddaren, d.v.s. en hardvaruomstart. Processorenheten 310 kan fore eller efter omstarten lasa data fran °eh/eller skriver data till minnet 118. Sensorn 100 kan vidare vara anordnad sa att den ar paslagen efter att ha avlagsnats fran laddaren sa att den är i ett lageffektlage som kraver initiering (VACKNING) av nyckelkretsen 500. Vackningsforfarande minskar energifOrbrukningen hos sensorn 100. It should be noted that the switch 304 further connects the circuit 300 via Venekt to drive the sensor 100. By this arrangement, the power supply for the sensor 100 is turned off during charging, during which the battery 306 is connected to the contact C1. This is advantageous because a better control of the charging of the battery 306 is obtained and that the energy consumption of the sensor is minimized when the charging of the sensor 100 is completed here. The sensor 100 can be restarted when the sensor 100 is removed from the charger, i.e. and hardware restart. The processor unit 310 may, before or after the restart, read data from and / or write data to the memory 118. The sensor 100 may further be arranged to be passable after being disconnected from the charger so that it is in a low power mode requiring initiation (WAKE) of the key circuit 500. Waking procedure reduces the energy consumption of the sensor 100.
Enligt denna utforingsform av sensorn 100 innefattar kretsen 300 vidare en termistor 308 som ar elektriskt kopplad till kontakten 03 och blir forspand under laddningen av batteriet 306. Resistansen hos termistorn 308 varierar vasentligen med temperaturen. Genom att placera termistorn 308 i narheten av batteriet 306 kan variationer i temperaturen hos batteriet 306 detekteras. Om till exempel temperaturen hos batteriet 306 ar utanfor ett forutbestamt temperaturintervall sa ska laddningen av batteriet 306 avslutas. Detta fOrbattrar effektiviteten i laddningen av batteriet 306 och minskar riskerna fOr batteriet 306 aft Overhettas. En langre livslangd erhalles darigenom. According to this embodiment of the sensor 100, the circuit 300 further comprises a thermistor 308 which is electrically connected to the contact 03 and is biased during the charging of the battery 306. The resistance of the thermistor 308 varies substantially with the temperature. By placing the thermistor 308 near the battery 306, variations in the temperature of the battery 306 can be detected. For example, if the temperature of the battery 306 is outside a predetermined temperature range, then charging the battery 306 should be terminated. This improves the efficiency of charging the battery 306 and reduces the risks of the battery 306 being overheated. A longer lifespan is thereby obtained.
Kretsen 300 innefattar en processorenhet 310 och eft filter 312, vilka bada ar i elektrisk fOrbindelse med kontakterna C4 och C5. Processorenheten 310 ar anordnad pa sa att en potentiella som appliceras pa C4 initierar processorenheten 310, i en sa kallad vackningsprocedur. Filtret 312 tillsammans med en spanningsberoende resistor (VDR) 314 tillhandahalls for att filtrera bort falska signaler, t.ex. elektrostatiska urladdningar som till 9 537 096 exempel kan initiera processorenheten 310. Kretsen 300 ar darmed aven arrangerat att kortsluta hoga spanningar till jord for att skydda processorenheten 310. Processorenheten 310 kan innefatta ett CC2530-chip. The circuit 300 comprises a processor unit 310 and a filter 312, both of which are in electrical connection with the contacts C4 and C5. The processor unit 310 is arranged so that a potential applied to C4 initiates the processor unit 310, in a so-called wake-up procedure. The filter 312 together with a voltage dependent resistor (VDR) 314 is provided to filter out false signals, e.g. electrostatic discharges which, for example, can initiate the processor unit 310. The circuit 300 is thus also arranged to short circuit high voltages to ground to protect the processor unit 310. The processor unit 310 may comprise a CC2530 chip.
Kontakt 05 ar kopplad till jord och darmed till batteriet 306. Connector 05 is connected to earth and thus to the battery 306.
Den yttre kretsen kan enligt fOreliggande uppfinning till exempel innefatta nyckelkretsen 500 eller laddningskretsen 600 sasom kommer att beskrivas i det foljande. According to the present invention, the external circuit may, for example, comprise the key circuit 500 or the charging circuit 600 as will be described in the following.
Fig. 5 visar en nyckelkrets 500 som ar anordnade att, via processorenheten 310, initiera sensorn 100 i ett excitations /initiationsforfarande som ofta kallas ett vackningsforfarande. Nyckelkretsen 500 innefattar ett batten i 502 , ett motstand 504 sarrit kontakterna C4' och 05'. Batteriet 502 ar foretradesvis ett silveroxidbatteri som ger en lang livslangd hos nyckelkretsen 500. Resistorn 504 ar anpassad till processorenheten 310 och anordnad sa att den ar ansluten I serie med en digital ingang hos processorenheten 310. Detta ar fOrdelaktig eftersom nyckelkretsen 500 kan initiera eller vacka sensorn 100, aven am potentialen I batteriet har minskat avsevart frail dess fulladdat niva. Resistom 504 reducerar aven kortslutningsstrOmmen som upptrader i kretsen 500 i handelse av en kortslutning, detta skyddar kretsen 500 fran skador. Kontakterna C4' och C5' ar anordnade pa sa satt att de kan fOras i galvanisk kontakt med respektive kontakt 04 och C5 i kretsen 300. Salunda kan effektiv elektriska kontakter mellan kretsarna 300 och nyckel kretsen 500 erhallas. Fig. 5 shows a key circuit 500 which is arranged to, via the processor unit 310, initiate the sensor 100 in an excitation / initiation procedure which is often called a wake-up procedure. The key circuit 500 comprises a batten in 502, a resistor 504 sarrit the contacts C4 'and 05'. The battery 502 is preferably a silver oxide battery which provides a long life of the key circuit 500. The resistor 504 is adapted to the processor unit 310 and arranged so as to be connected in series with a digital input of the processor unit 310. This is advantageous as the key circuit 500 can initiate or wake the sensor. 100, even the potential of the battery has decreased significantly frail its fully charged level. Resistor 504 also reduces the short circuit current that occurs in circuit 500 in the event of a short circuit, this protects circuit 500 from damage. The contacts C4 'and C5' are arranged in such a way that they can be in galvanic contact with the respective contacts 04 and C5 in the circuit 300. Thus, efficient electrical contacts between the circuits 300 and the key circuit 500 can be obtained.
Fig. 6 visar en laddningskrets 600 has en laddare som ar anordnad att ladda kretsen 300 hos sensorn 100. Laddningskretsen 600 innefattar en strOmkalla 602, en mikrobrytare 604, en processorenhet 606, ett flertal indikatorer 608 och ett flertal kontakter 610 (Cl", C2", 03", 05"). Stromkallan 602 Or anordnad for stromforsOrjning av laddningskretsen 600 och for laddning av batteriet 306. Stromkallan 602 kan besta av ett batter', eft laddningsbart batten, en USB-anslutning som ger den Onskvarda spanningen fOr att driva laddaren eller flagon annan lamplig strOmkalla. Mikrobrytaren 604 ar omkopplingsbar mellan ett ledande och ett icke-ledande tillstand. Mikrobrytaren 604 ar anordnad pa sa satt att laddningskretsen 600 stromsatts nar mikrobrytaren 604 ar satt till det ledande tillstandet. Detta kan exempelvis intraffa nar atminstone en del av sensorn 100 bringas i kontakt med laddaren. Fig. 6 shows a charging circuit 600 having a charger arranged to charge the circuit 300 of the sensor 100. The charging circuit 600 includes a circuit breaker 602, a microswitch 604, a processor unit 606, a plurality of indicators 608 and a plurality of contacts 610 (C1 ", C2). ", 03", 05 "). The power source 602 is provided for supplying power to the charging circuit 600 and for charging the battery 306. The power source 602 may consist of a battery, according to the rechargeable battery, a USB connection which provides the undisclosed voltage to operate the charger or other suitable light source. The microswitch 604 is switchable between a conductive and a non-conductive state. The microswitch 604 is arranged so that the charging circuit 600 is energized when the microswitch 604 is set to the conductive state. This can occur, for example, when at least a portion of the sensor 100 is brought into contact with the charger.
Kontakten ar fOredraget en galvanisk kontakt. The contact is the lecture a galvanic contact.
Processorenheten 606 innefattar logik och kretsar som an anordnade for att ladda ett uppladdningsbart batted sasom ett litiumbatteri. Potentialerna 537 096 som anvands for initiering av laddningen (vaxla omkopplaren 304) och laddningen av batteriet 306 tillhandahalls av processorenheten 606 och appliceras via kontakterna Cl" och C2". Processorenheten 606 ar vidare anordnad att via kontakt C3" och termistorn 308 fa' atkomst till temperaturen hos batteriet 306 under laddning. Detta ger sasom diskuterats ovan effektiv laddning av batteriet. The processor unit 606 includes logic and circuits arranged to charge a rechargeable battery such as a lithium battery. The potentials 537 096 used to initiate the charge (switch the switch 304) and the charge of the battery 306 are provided by the processor unit 606 and are applied via the contacts C1 "and C2". The processor unit 606 is further arranged to access the temperature of the battery 306 during charging via contact C3 "and the thermistor 308. This gives, as discussed above, efficient charging of the battery.
Processorenheten 606 kan vara en BQ24040DSQT. The processor unit 606 may be a BQ24040DSQT.
Namnda flertalet indikatorer 608 ar anslutna till processorenheten 606 och ar anordnade pa sa satt att de anger status for laddningskretsen 600. Det ar darmed latt att visuellt avgora till exempel am strommen frail stromkallan 602 ar tillracklig fOr laddnig av batteriet 306, am laddningen av batteriet ar pagaende eller avslutat etc. The said plurality of indicators 608 are connected to the processor unit 606 and are arranged so as to indicate the status of the charging circuit 600. It is thus easy to visually determine, for example, whether the current from the power source 602 is sufficient to charge the battery 306, when the charging of the battery is pagaende or ended etc.
Namnda flertal kontakter 610 (C1", 02", 03", C5") ar anordnade pa sa satt att de kan bringas i galvanisk kontakt med respektive kontakt Cl 02, C3 och C5 has kretsen 300. Salunda kan effektiv elektrisk kontakt mellan kretsen 300 och laddningskretsen 600 erhallas. The said plurality of contacts 610 (C1 ", 02", 03 ", C5") are arranged in such a way that they can be brought into galvanic contact with the respective contacts C102, C3 and C5 having the circuit 300. Thus, efficient electrical contact between the circuit 300 and the charging circuit 600 is obtained.
Laddningskretsen 600 kan vidare innefatta eft flertal motstand 612, vilkas resistans bestammer de strommar som anvands vid laddning av batteriet 306. Det ar darmed mojligt att till exempel stalla in den maximala strommen och den minsta strammen som anvands under laddningen, vilket minskar risken for overhettning i batteriet 306 eller andra skador pa batteriet 306 eller kretsen 300 som kan uppsta som en VOW av alltfor stora strOmmar som flyter kretsen 300. Detta arrangemang fOrbattrar ocksa batteriets livslangd 306. The charging circuit 600 may further comprise, after a plurality of resistors 612, the resistance of which determines the currents used in charging the battery 306. It is thus possible to set, for example, the maximum current and the minimum current used during charging, which reduces the risk of overheating in the battery 306 or other damage to the battery 306 or the circuit 300 which may occur as a VOW of excessive currents flowing in the circuit 300. This arrangement also improves the life of the battery 306.
Fackmannen inom teknikomraciet inser att foreliggande uppfinning pa intet salt ar begransad till de foredragna utforingsformerna som beskrivits ovan. Tvartom ar manga modifikationer och variationer mojliga inom omfanget for de efterfoljande kraven. Those skilled in the art will recognize that the present invention is by no means limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims.
Exempelvis inser fackmannen inom teknikomradet att sensorn kan 30 anvandas for att mata andra tryck an ett hydrauliskt tryck, Omkopplaren 304 kan ocksa vara en CMOS analog omkopplare av single-pole/double-throw (SPDT) monolitiskt slag eller en MOSFET. For example, those skilled in the art will recognize that the sensor can be used to supply other pressures at a hydraulic pressure. The switch 304 may also be a single-pole / double-throw (SPDT) monolithic CMOS analog switch or a MOSFET.
Sensom 100 kan innefatta en fOrsta temperaturmatare som ar anordnad att kanna av temperaturen i den hydrauliska kammaren. En andra temperaturmatare ar foredraget anordnad utanfor tryckkammaren. Detta arrangemang mOjliggar for matningar av en relativ temperatur som hanfor sig till den temperatur som uppmats med respektive forsta och andra 11 537 096 temperaturmatare. En fordel med etta ar att en mer tillforlitlig och effektiv temperaturmatning kan erhallas. The sensor 100 may comprise a first temperature feeder which is arranged to sense the temperature in the hydraulic chamber. A second temperature feeder is preferably arranged outside the pressure chamber. This arrangement allows for feedings of a relative temperature which is related to the temperature measured with the first and second temperature feeders, respectively. An advantage of this is that a more reliable and efficient temperature supply can be obtained.
Den tredlasa kommunikationsenheten 110 ar vidare anordnad aft via antennen 112 sanda och/eller mottaga radiosignaler. Detta mOjliggor exempelvis for kommunikation mellan individuella sensorer, med en mottagarenhet och/eller en styrenhet. Mottagaren kan innefatta en processorenhet och en kommunikationsenhet for overfOring av data till och -Iran sensorerna 100. Mottagaren kan forstas som en repeater eller en fOrstarkare av radiosignaler i syfte aft forbattra overforingen av data till och fran sensorn 100. Det är fordelaktigt att anordna en mottagare i narheten av en sensor 100 i miljoer sasom ett maskinverktyg som innefattar metaller och andra material som kan stora eller skarma av radiosignaler till och fran sensorn. Det kan finnas en mottagare som är tillskriven var och en av sensorerna eller en mottagare som är tillskriven ett flertal sensorer 100. The tripless communication unit 110 is further arranged to transmit and / or receive radio signals via the antenna 112. This makes it possible, for example, for communication between individual sensors, with a receiver unit and / or a control unit. The receiver may comprise a processor unit and a communication unit for transmitting data to and from the sensors 100. The receiver may be understood as a repeater or an amplifier of radio signals in order to improve the transmission of data to and from the sensor 100. It is advantageous to provide a receiver. in the vicinity of a sensor 100 in millions as a machine tool comprising metals and other materials capable of amplifying or shielding radio signals to and from the sensor. There may be a receiver assigned to each of the sensors or a receiver assigned to a plurality of sensors 100.
Styrenheten kan innefatta en display for visning av data som hanfor sig till det hydrauliska trycket i den hydrauliska kammaren som avkanns av sensorn. Styrenheten kan vidare vara anordnad aft kommunicera med processorenheten 116, 300 hos sensorn. The control unit may comprise a display for displaying data which relates to the hydraulic pressure in the hydraulic chamber sensed by the sensor. The control unit may further be arranged to communicate with the processor unit 116, 300 of the sensor.
Batteriet 306 kan vara ett uppladdningsbart litiumbatteri. The battery 306 may be a rechargeable lithium battery.
Ytterligare variationer av de beskrivna utfOringsformerna kan forstas och utfOras av fackmannen som utovar denna uppfinning, genom aft studera ritningarna, beskrivningen och de bifogade kraven. Dessutom, i ritningarna och i specifikationen har foredragna utforingsformer och exempel av uppfinningen beskrivits, aven om specifika termen anvands, anvands de i en allman och beskrivande mening och inte i syfte att begransa omfanget for uppfinningen som anges i de bifogade patentkraven. 1 kraven utesluter ordet "innefattar" inte andra element eller steg, och den obestamda artikeln "en" eller "eft" utesluter inte en mangfald. 12 Further variations of the described embodiments may be understood and practiced by those skilled in the art who practice this invention, by studying the drawings, the description and the appended claims. In addition, in the drawings and in the specification, preferred embodiments and examples of the invention have been described, although the specific terms are used, they are used in a general and descriptive sense and not for the purpose of limiting the scope of the invention as set forth in the appended claims. In the claims, the word "does not" exclude other elements or steps, and the indefinite article "en" or "eft" does not exclude a plurality. 12
Claims (11)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1351160A SE537096C2 (en) | 2013-10-02 | 2013-10-02 | Wireless sensor for measuring hydraulic pressure |
| PCT/SE2014/051085 WO2015050489A1 (en) | 2013-10-02 | 2014-09-23 | Wireless sensor for measuring a hydraulic pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1351160A SE537096C2 (en) | 2013-10-02 | 2013-10-02 | Wireless sensor for measuring hydraulic pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1351160A1 SE1351160A1 (en) | 2015-01-07 |
| SE537096C2 true SE537096C2 (en) | 2015-01-07 |
Family
ID=52122269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1351160A SE537096C2 (en) | 2013-10-02 | 2013-10-02 | Wireless sensor for measuring hydraulic pressure |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE537096C2 (en) |
| WO (1) | WO2015050489A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241603B (en) * | 2015-11-02 | 2018-08-07 | 贵阳博烁科技有限公司 | A kind of water supply network pressure monitoring terminal and monitoring system |
| JP6776143B2 (en) * | 2017-02-03 | 2020-10-28 | 横河電機株式会社 | Water level measurement system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29615534U1 (en) * | 1996-09-06 | 1996-10-24 | Dbt Gmbh | Pressure transducer for measuring hydraulic pressures, especially for mining applications |
| DE19834212A1 (en) * | 1998-07-29 | 2000-02-10 | Siemens Ag | Control device in a motor vehicle and pressure sensor used by this |
-
2013
- 2013-10-02 SE SE1351160A patent/SE537096C2/en unknown
-
2014
- 2014-09-23 WO PCT/SE2014/051085 patent/WO2015050489A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015050489A1 (en) | 2015-04-09 |
| SE1351160A1 (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3163148B1 (en) | Lubricating oil supply unit and bearing device | |
| AU2015403425B2 (en) | Wear sensor and wear element, and corresponding assembly and use | |
| CN105451941B (en) | Dust arrester | |
| CN105869357B (en) | Soak alarm device and immersion warning system | |
| EP2684647A1 (en) | Electric tool using secondary cells as power source | |
| NZ598090A (en) | Printing apparatus, printing material cartridge, adaptor for printing material container, and circuit board | |
| JP6368170B2 (en) | Lubricating oil supply unit and bearing device | |
| AU2010326660B2 (en) | Battery electrolyte level indicator | |
| CN105699777A (en) | Method and apparatus for contact detection in battery packs | |
| US8308316B2 (en) | Lamp | |
| JP7101486B2 (en) | Sensor | |
| SE537096C2 (en) | Wireless sensor for measuring hydraulic pressure | |
| WO2017081348A1 (en) | Device for measuring physical magnitudes on electrical conductor cables with outer peripheral insulation | |
| WO2004046692A3 (en) | Corrosion testing apparatus | |
| KR20140097681A (en) | Battery pack, method of welding tab of back, and battery pack control system | |
| JP2016161407A (en) | Abnormality detector | |
| US10666040B2 (en) | Machine having at least one motor and one machine protection circuit | |
| CN104199535A (en) | Digital power supply device and method | |
| JP2007042396A (en) | Battery pack, and electric apparatus equipped with it | |
| US7791228B2 (en) | Energy supply of a measuring device | |
| US20220178857A1 (en) | Sensor | |
| CN210396768U (en) | Tunnel water plugging device with water pressure monitoring device | |
| EP3273076A1 (en) | Bearing device and machine device | |
| CN207036335U (en) | A kind of acquisition and analysis instrument circuit board | |
| JP2009295421A (en) | Power supply device |