WO2016102028A1 - Système de détection d'humidité - Google Patents

Système de détection d'humidité Download PDF

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Publication number
WO2016102028A1
WO2016102028A1 PCT/EP2014/079341 EP2014079341W WO2016102028A1 WO 2016102028 A1 WO2016102028 A1 WO 2016102028A1 EP 2014079341 W EP2014079341 W EP 2014079341W WO 2016102028 A1 WO2016102028 A1 WO 2016102028A1
Authority
WO
WIPO (PCT)
Prior art keywords
casing
cap
sorbent
humidity sensor
humidity
Prior art date
Application number
PCT/EP2014/079341
Other languages
English (en)
Inventor
Cornel Cobianu
Alisa Stratulat
Bogdan Serban
Octavian Buiu
Mihai Brezeanu
Cazimir Bostan
Original Assignee
Honeywell International Inc.
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 Honeywell International Inc. filed Critical Honeywell International Inc.
Priority to PCT/EP2014/079341 priority Critical patent/WO2016102028A1/fr
Publication of WO2016102028A1 publication Critical patent/WO2016102028A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
    • G01N27/225—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity by using hygroscopic materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0014—Sample conditioning by eliminating a gas

Definitions

  • the present disclosure relates to apparatuses, systems, and methods for humidity sensing.
  • Humidity sensors may be used in industrial and domestic applications for environmental control.
  • Some humidity sensors include a polymeric sensing layer (e.g., polyimide (PI)) having a dielectric constant that changes relative to humidity.
  • PI polyimide
  • a humidity sensor may be exposed to cleaners and/or disinfectants containing a number of chemicals (e.g., volatile organic compounds (VOCs), ammonia, etc.)
  • a number of chemicals e.g., volatile organic compounds (VOCs), ammonia, etc.
  • VOCs volatile organic compounds
  • medical applications for instance, may involve cleaning and/or disinfecting using chemicals.
  • the chemicals may react with the polymeric sensing layer of the sensor thereby leading to the degradation (and/or delaminating) of the sensing layer.
  • the rate of the degradation may increase with high levels of relative humidity.
  • the sensor's functionality and/or accuracy may be affected.
  • the sensor's lifetime may be reduced.
  • Figure 1 illustrates a cross-sectional view of a humidity sensing apparatus in accordance with one or more embodiments of the present disclosure.
  • Figure 2 illustrates a humidity sensing system in accordance with one or more embodiments of the present disclosure.
  • Figure 3 illustrates a method of making a humidity sensing apparatus in accordance with one or more embodiments of the present disclosure.
  • one or more embodiments include a casing, a humidity sensor encased in the casing, a cap fastened to the casing, a particulate filter between the cap and the humidity sensor, and a sorbent between the filter and the humidity sensor.
  • Humidity can be sensed (e.g., determined, acquired, etc.), in accordance with one or more embodiments of the present disclosure, with a reduction of (e.g., an elimination of) the harmful effects of harsh chemicals on a humidity sensor.
  • a humidity sensor can be encased in a protective casing filled (e.g., completely or partially filled) with a sorbent.
  • the sorbent can serve to adsorb one or more airborne chemicals from the ambient air before they reach the humidity sensor. As a result, the sensor can be protected from the deleterious effects of the airborne chemicals.
  • the term "sensor” is used herein to refer to a humidity sensor and/or a relative humidity sensor.
  • the sensor can include a polymeric sensing layer (e.g., polyimide (PI)) having a dielectric constant that changes relative to humidity, though embodiments of the present disclosure are not so limited.
  • PI polyimide
  • the protected sensor may function for a longer period of time than an unprotected sensor (i.e., an unprotected sensor embodying previous approaches to humidity sensing).
  • an unprotected sensor i.e., an unprotected sensor embodying previous approaches to humidity sensing.
  • the accuracy and/or efficacy of the protected sensor may endure longer than previous approaches.
  • maintenance and replacement costs can be reduced using one or more embodiments of the present disclosure.
  • the sorbent used to protect the sensor can be selected based on the identity and/or type of chemical(s) in (or likely to be in) the ambient air which the sensor is used to sense.
  • chemicals can include ammonia and/or volatile organic compounds (VOCs).
  • VOCs volatile organic compounds
  • a non-limiting list of VOCs can include, for example, acetone, benzene, butane, carbon tetrachloride, ethanol, formaldehyde, hexane, methyl methacrylate, naphthalene, trichloroethene, and many others.
  • a sorbent can be selected to adsorb one or more chemicals.
  • sorbent can refer to a single sorbent (i.e., a single element or compound) and/or a combination of more than one sorbent. Some sorbent combinations are manufactured and distributed as brand name products, some of which are shown in Table 1 below.
  • Embodiments of the present disclosure can include a removable cap (e.g., a screw-on cap). If the sorbent is saturated with one or more chemicals, for instance, or if the sorbent is to be changed, the cap can be removed to allow access to the sorbent. In some embodiments, a user may visualize that the sorbent has become saturated with one or more chemicals. For example, the sorbent can change color responsive to saturation by one or more chemicals.
  • a removable cap e.g., a screw-on cap.
  • the cap may include one or more openings to allow the flow of ambient air therethrough.
  • Embodiments of the present disclosure can include a filter (e.g., a particulate filter), which may be integrated into the cap. The filter can block particulate access to the sorbent while allowing the flow of ambient air therethrough.
  • a filter e.g., a particulate filter
  • FIG 1 illustrates a cross-sectional view of a humidity sensing apparatus 100 in accordance with one or more embodiments of the present disclosure.
  • the apparatus 100 includes a humidity sensor 104 encased in a casing 102, the casing 102 capped by a cap 106.
  • the casing 102 can be cylindrical in shape (e.g., substantially cylindrical) and defined by a side surface 102-1 and a bottom surface 102-2, though embodiments of the present disclosure are not so limited.
  • the casing can be a rectangular prism (e.g., a box).
  • the cap 106 can be fastened (e.g., removably fastened) to the casing 102.
  • the cap 106 can be circular (e.g., substantially circular) and can be fastened (e.g., screwed on) to the casing 102 via a plurality of threads 120.
  • the threads 120 can be formed to precise standards such that ambient air is prevented from passing through the threads 120 to the interior of the casing 102.
  • the cap 106 can be fastened to the casing 102 by other means.
  • the cap 106 can be latched, clamped, clipped, pinned, and/or otherwise fastened (e.g., removably fastened) to the casing 102.
  • the cap 106 can include one or more surfaces defining one or more openings 1 12. Ambient air can pass through the openings 1 12 of the cap 106. Embodiments of the present disclosure do not limit the openings 1 12 to a particular quantity, size, and/or shape.
  • the sensor 104 can be attached to the casing 102 (e.g., an inner surface of the casing 102).
  • the sensor 104 is attached to the bottom surface 102-2 of the casing 102 by an adhesive 1 13.
  • the adhesive 1 13 can be room temperature vulcanization (RTV) adhesive (e.g., RTV silicone), for instance, though embodiments of the present disclosure are not so limited.
  • RTV room temperature vulcanization
  • the sensor 104 can be attached to the casing 102 by other means (e.g., one or more fastener(s) allowing the sensor 104 to be attached to the casing 102).
  • the apparatus 100 can include a filter 108 (e.g., a particulate filter) between the cap 106 and the sensor 104.
  • a filter 108 e.g., a particulate filter
  • the filter 108 can be integrated into, and/or attached to, the cap 106.
  • the filter 108 can filter out particulate matter from the ambient air such that particulate matter is prevented (e.g., substantially prevented) from passing through the filter 108.
  • the filter can be a P100 filter, for instance, adapted to filter at least 99.97% of airborne particles.
  • the casing can be filled (e.g., at least partially filled) with a sorbent
  • the sorbent 1 10 can be selected based on the identity and/or type of chemical(s) in (or likely to be in) the ambient air which the sensor 104 is used to sense.
  • the sorbent 1 10 can be selected based on a molecular weight of chemical(s) in (or likely to be in) the ambient air which the sensor 104 is used to sense.
  • the sorbent can be adapted to adsorb ammonia.
  • the sorbent can be adapted to adsorb at least one VOC.
  • the sorbent 1 10 can be a powder, a porous resin, a
  • the sorbent can be included in a cartridge and the cartridge can be placed into the casing.
  • the filter 108 can include a sorbent.
  • Table 1 includes a short list of some example sorbents along with related information.
  • Tablel includes a short list of some example sorbents along with related information.
  • sorbents can be selected to adsorb particular chemicals and that Table 1 is not intended to be taken in a limiting sense.
  • titanium dioxide impregnated with zinc chloride can be used as the sorbent 1 10.
  • Other sorbents can be used; embodiments of the present disclosure are not limited to a particular type of sorbent.
  • the sorbent 1 10 should not be a sorbent with a high affinity for water. That is, embodiments of the present disclosure do not include hydrophilic sorbents as the sorbent 1 10 as such sorbents would be likely to alter the humidity of the ambient air sensed by the sensor 104.
  • a distance 1 18 between the sensor 104 and the filter can be selected.
  • the distance 1 18 can be selected based on a type of the sorbent 1 10, an adsorption rate of the sorbent, a likely humidity level of the ambient air, a type of the chemical(s) to be adsorbed, a concentration of one or more chemicals in the ambient air, and/or a desired length of time before the sorbent is to be changed (or the apparatus 100 discarded).
  • the sorbent 1 10, over the distance 1 18, can adsorb one or more chemicals from the ambient air such that the sensor 104 is prevented from being exposed to (e.g., contacting) the one or more chemicals.
  • the sorbent 1 10 can prevent a threshold amount of one or more chemicals from reaching the sensor 104.
  • Ambient air minus any chemicals adsorbed by the sorbent 1 10) can pass through one or more of the openings 1 12, then through the filter 108, then through the sorbent 1 10, and then come into contact with the sensor 104.
  • the sensor 104 can sense a humidity of the ambient air and produce an output through one or more pins 1 14.
  • the output can be a particular voltage.
  • the output can be a linear (e.g., near-linear) voltage output as a function of relative humidity percentage.
  • the output of the sensor 104 can be received by a controller and/or a computing device (discussed in connection with Figure 2) from the sensor 104 via the pins 1 14. As shown, the pins 1 14 can pass through the casing 102 (e.g., the bottom surface 102-2 of the casing 102) though one or more openings 1 16.
  • the openings 1 16 can be sealed such that ambient air is prevented from passing therethrough.
  • the openings 1 16 can be sealed with an adhesive, such as RTV adhesive (e.g., RTV silicone), for instance, though embodiments of the present disclosure are not so limited.
  • RTV adhesive e.g., RTV silicone
  • material(s) used for the cap 106 and/or the casing 102 may be selected for their non-reactiveness with one or more of the chemicals in the ambient air.
  • the cap 106 and/or the casing 102 may be composed of a polymer, such as
  • FIG. 2 illustrates a humidity sensing system 222 in accordance with one or more embodiments of the present disclosure.
  • the system 222 can include a humidity sensing apparatus 200.
  • the apparatus 200 can be analogous to the apparatus 100 previously described in
  • the apparatus 200 can be connected (e.g., wired and/or wirelessly connected) to a controller 224. As shown in the embodiment illustrated in Figure 2, the apparatus 200 can be connected to the controller 224 via a plurality of pins 214.
  • the controller 224 can include logic.
  • logic is an alternative or additional processing resource to execute the actions and/or functions, etc., described herein, which includes hardware (e.g., various forms of transistor logic, application specific integrated circuits (ASICs), etc.), as opposed to computer executable instructions (e.g., software, firmware, etc.) stored in memory and executable by a processor.
  • the controller 224 can include logic to receive an output of the humidity sensor 104 and determine a humidity of the ambient air based on the output.
  • the controller can have memory that can be used to store data and can include functionality to transfer the data to a user or apparatus external to the controller.
  • the system 222 can include a computing device.
  • the computing device can include a memory and a processor coupled to the memory.
  • the processor can be a controller (e.g., a micro controller).
  • the memory can be any type of storage medium that can be accessed by the processor to perform various examples of the present disclosure.
  • the memory can be a non-transitory computer readable medium having computer readable instructions (e.g., computer program instructions) stored thereon that are executable by the processor to determine humidity in accordance with one or more embodiments of the present disclosure.
  • the memory can be volatile or nonvolatile memory.
  • the memory can also be removable (e.g., portable) memory, or non-removable (e.g., internal) memory.
  • the memory can be random access memory (RAM) (e.g., dynamic random access memory (DRAM) and/or phase change random access memory (PCRAM)), read-only memory (ROM) (e.g., electrically erasable programmable read-only memory (EEPROM) and/or compact-disc read-only memory (CD-ROM)), flash memory, a laser disc, a digital versatile disc (DVD) or other optical disk storage, and/or a magnetic/solid state medium such as magnetic cassettes, tapes, compact memory cards (flash, secure digital), or disks, among other types of memory.
  • RAM random access memory
  • DRAM dynamic random access memory
  • PCRAM phase change random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact-disc read-only memory
  • flash memory e.g., compact-disc read-only memory
  • flash memory e.g., compact-disc read-only memory (EEPROM)
  • laser disc e.g.,
  • the memory can also be located internal to another computing resource (e.g., enabling computer readable instructions to be downloaded over the Internet or another wired or wireless connection).
  • the computing device can include a user interface. A user of the computing device can interact with the computing device and/or the sensor 104 via the user interface.
  • the user interface can provide (e.g., display and/or present) information to the user of the computing device, and/or receive information from (e.g., input by) the user of the computing device.
  • the user interface can be a graphical user interface (GUI) that can include a display (e.g., a screen) that can provide and/or receive information to and/or from the user of the computing device.
  • GUI graphical user interface
  • the display can be, for instance, a touch-screen (e.g., the GUI can include touch-screen capabilities).
  • the user interface can include a keyboard and/or mouse the user can use to input information into the computing device.
  • Embodiments of the present disclosure are not limited to particular types of user interface.
  • Figure 3 illustrates a method 326 of making a humidity sensing apparatus in accordance with one or more embodiments of the present disclosure.
  • the humidity sensing apparatus made using method 326 can be analogous to the humidity sensing apparatus 100 previously described in connection with Figure 1 , for instance, though embodiments of the present disclosure are not so limited.
  • method 326 includes adhering a humidity sensor to an interior surface of a casing.
  • the humidity sensor can be a relative humidity sensor, for instance. As previously discussed, the humidity sensor can be adhered to a bottom interior surface of the casing.
  • the casing can be a cylindrical (e.g., tubular) casing, for instance, though embodiments of the present disclosure are not so limited.
  • One suitable adhesive for adhering the sensor to the casing is RTV silicone, though embodiments according to the present disclosure can include alternative or additional adhesives.
  • method 326 includes forming at least one opening through the casing.
  • the at least one opening can be formed by drilling and/or etching through the casing, for example.
  • the casing can be produced via a 3D printing process or any other additive technology process.
  • the at least one opening can be formed on a same surface of the casing to which the sensor is adhered. In other embodiments, the at least one opening can be formed on a different surface of the casing to which the sensor is attached. In other embodiments, a portion of the at least one opening (e.g., one or more openings) can be formed one a first surface of the casing and another portion of the at least one opening (e.g., one or more openings) can be formed on a second surface of the casing.
  • method 326 includes passing at least one pin of the humidity sensor through the at least one opening.
  • Sensors herein are not limited to a particular number of pins.
  • a quantity of pins passing through each of the at least one opening is not intended to be limited by embodiments described herein.
  • each pin of the sensor passes through a respective opening (e.g., each of three pins passes through a respective one of three openings).
  • Passing the at least one pin of the humidity sensor though the at least one opening can include modifying the at least one pin.
  • the at least one pin can be bent and/or lengthened such that it is able to be passed through the at least one opening.
  • method 326 includes sealing the at least one opening having the at least one pin therethrough.
  • the at least one opening can be sealed using RTV silicone, though embodiments of the present disclosure are not so limited. Sealing the at least one opening can include sealing the at least one opening such that ambient air is prevented from passing through the at least one opening.
  • method 326 includes filling the casing at least partially with a sorbent.
  • the sorbent can be poured into the casing (e.g., as a powder).
  • the sorbent can be included in a cartridge and the cartridge can be placed into the casing.
  • the particular sorbent used to fill the casing can be selected based on the identity and/or type of chemical(s) in (or likely to be in) the ambient air which the sensor is used to sense.
  • the sorbent can be selected based on a molecular weight of chemical(s) in (or likely to be in) the ambient air which the sensor is used to sense.
  • method 326 includes fastening a cap provided with one or more openings to the casing.
  • the cap is provided with one or more openings for ambient access to the sorbent, for instance.
  • the cap can be produced via a 3D printing process or any other additive technology process.
  • the cap fastening can also be accomplished via these types of processes.
  • some embodiments include a threaded cap.
  • fastening the cap to the casing can include aligning the threads of the cap with corresponding threads on the casing and rotating the cap with respect to the casing until the cap is fastened to the casing.
  • embodiments of the present disclosure are not limited to particular fasteners or to particular manners of fastening the cap to the casing.
  • the cap is removably fastened to the casing such that the cap can be subsequently removed (e.g., unfastened) to change the sorbent or access the sensor, for instance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

La présente invention porte sur des appareils, des systèmes et des procédés de détection d'humidité. Un appareil comprend un boîtier, un capteur d'humidité intégré dans le boîtier, un capuchon fixé sur le boîtier, un filtre à particules entre le capuchon et le capteur d'humidité et un sorbant, entre le filtre et le capteur d'humidité.
PCT/EP2014/079341 2014-12-24 2014-12-24 Système de détection d'humidité WO2016102028A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/079341 WO2016102028A1 (fr) 2014-12-24 2014-12-24 Système de détection d'humidité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/079341 WO2016102028A1 (fr) 2014-12-24 2014-12-24 Système de détection d'humidité

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WO2016102028A1 true WO2016102028A1 (fr) 2016-06-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600072363A1 (it) * 2016-07-12 2018-01-12 Fondazione St Italiano Tecnologia Sensore per rilevare la presenza di un gas e/o vapore di ammoniaca.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567152A2 (fr) * 1992-04-24 1993-10-27 Matsushita Electric Industrial Co., Ltd. Capteur d'humidité
US20020006358A1 (en) * 2000-06-16 2002-01-17 Yamatake Corporation Detector
CN201719939U (zh) * 2010-07-02 2011-01-26 浙江叁益人防工程设备有限公司 一种带湿度指示装置的过滤吸收器
WO2012018766A2 (fr) * 2010-08-06 2012-02-09 Scott Technologies, Inc. Procédé et appareil d'intégration de capteurs environnementaux et chimiques dans filtre de purification d'air par support de capteurs réutilisable
JP2014228457A (ja) * 2013-05-24 2014-12-08 フィガロ技研株式会社 ガスセンサとガス検出装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567152A2 (fr) * 1992-04-24 1993-10-27 Matsushita Electric Industrial Co., Ltd. Capteur d'humidité
US20020006358A1 (en) * 2000-06-16 2002-01-17 Yamatake Corporation Detector
CN201719939U (zh) * 2010-07-02 2011-01-26 浙江叁益人防工程设备有限公司 一种带湿度指示装置的过滤吸收器
WO2012018766A2 (fr) * 2010-08-06 2012-02-09 Scott Technologies, Inc. Procédé et appareil d'intégration de capteurs environnementaux et chimiques dans filtre de purification d'air par support de capteurs réutilisable
JP2014228457A (ja) * 2013-05-24 2014-12-08 フィガロ技研株式会社 ガスセンサとガス検出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FRANCIS TSOW ET AL: "A Wearable and Wireless Sensor System for Real-Time Monitoring of Toxic Environmental Volatile Organic Compounds", IEEE SENSORS JOURNAL, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 9, no. 12, 23 October 2009 (2009-10-23), pages 1734 - 1740, XP011278855, ISSN: 1530-437X, DOI: 10.1109/JSEN.2009.2030747 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600072363A1 (it) * 2016-07-12 2018-01-12 Fondazione St Italiano Tecnologia Sensore per rilevare la presenza di un gas e/o vapore di ammoniaca.
WO2018011694A1 (fr) * 2016-07-12 2018-01-18 Fondazione Istituto Italiano Di Tecnologia Capteur de détection de gaz d'ammoniac ou de vapeur d'ammoniac, procédé de fabrication dudit capteur et son utilisation

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