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WO2023058001A1 - Capteur en forme de bulle pour mesurer une force et une pression de contact omnidirectionnelles - Google Patents

Capteur en forme de bulle pour mesurer une force et une pression de contact omnidirectionnelles Download PDF

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Publication number
WO2023058001A1
WO2023058001A1 PCT/IB2022/059658 IB2022059658W WO2023058001A1 WO 2023058001 A1 WO2023058001 A1 WO 2023058001A1 IB 2022059658 W IB2022059658 W IB 2022059658W WO 2023058001 A1 WO2023058001 A1 WO 2023058001A1
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WO
WIPO (PCT)
Prior art keywords
sensors
pressure
sensor
bubble
need
Prior art date
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Ceased
Application number
PCT/IB2022/059658
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English (en)
Inventor
Mohammad MOHAMMAD AMINI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sensomatt Lda
Original Assignee
Sensomatt Lda
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 Sensomatt Lda filed Critical Sensomatt Lda
Publication of WO2023058001A1 publication Critical patent/WO2023058001A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/10—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type

Definitions

  • the present invention relates to a novel contact pressure sensing device and method of using the same.
  • the invention is a bubble-shaped pressure sensing device that comprises a flexible integral shell (1), electronic elements (2), a rigid plate (5), battery (6), charging units (3) and sensors (4).
  • this affordable device is for determining the amount of contact pressure.
  • it can be used in a wide range of industries such as manufacturing medical equipment needing to measure pressure, manufacturing home appliance especially in connection with BMS (Building Management System) and smart homes, vehicle industry, manufacturing furniture such as chairs, sofa, and beds, and any other fields have any need to pressure measuring especially the contact pressure.
  • BMS Building Management System
  • the current invention relates to a sensor for measuring contact pressure with high precision that is flexible due to its special material.
  • This invention has a long-life battery and is completely seamless.
  • the sensor is absolutely compatible with piezoelectric elements with a wide range of function. It is capable of providing both analogue and digital outputs.
  • Pressurized air has been inserted into its flexible integral shell (1). Exerting any pressure in any direction to the flexible integral shell (l)leads to change in the pressure of the air inside which is measured by the sensors (4) placed within the flexible integral shell (1).
  • the pressure sensor in the bubble is responsible for determining the absolute pressure amount of the air inside the bubble and measuring its changes.
  • One mechanism is using elastic mechanical element for sensing the force like the one described in Patent No. US4747313.
  • This device includes a support rod and a plurality of elastic members i.e. springs each having one end connected to the sensor body and the other end connected to the sensitive shell.
  • the problem with such mechanism is that mechanical elements need frequent lubrication to perform well. Moreover, its life-cycle is much shorter due to high depreciation rate of mechanical parts. Also, friction may affect the accuracy of sensing.
  • Patent No. US7701202 which uses a magnet under the convex surface and senses the force through measuring the change in magnetic field.
  • the compliant convex surface defines a dome with a hollow interior and has a linear relation between displacement and load including a magnet disposed substantially at the center of the dome above a sensor array that responds to magnetic field intensity.
  • magnetic field can be affected easily by external factors such as nearby electricity field. Therefore, there are considerations for the location of usage and the nearby items.
  • Patent No. US6550344 introduced another device and method for this.
  • semi-flush air data sensing probes have been used. It is formed as an elongated bubble housing directly supported on an aircraft surface having a generally longitudinally extending rounded outer edge Surface with a rounded contoured leading end.
  • This device and method can only sense static pressure and is not practical for applications in which dynamic forces or pressure are exerted.
  • Patent No. US20090320611A1 is an elastic cover for tactile sensors, said cover comprising an inner surface suitable for being fixed to a Surface defined by the tactile sensors. Nevertheless, this invention can only detect force/pressure from just one dimension. Hence, its application is limited.
  • Our invention has solved all of the aforementioned problems. It doesn’t have mechanical elements in sensing sector so it enjoys life longevity. None can affect the accuracy of sensing of this invention. Moreover, it can measure pressure from all dimensions and directions, and both static and dynamic force can be converted to pressure and be measured.
  • the current invention related to a device for sensing pressure through sensing the change in the filling air pressure.
  • This device is made of a flexible and through seamless shell (1) of polyurethane or any kind of flexible rubber in which all other parts including electronics parts (2), rigid plates (5), battery (6), charging unit (3) and sensors (4) are placed.
  • the shape of this shell is hemisphere (1) as it can bear all pressures from all directions.
  • the bottom level of hemisphere is supported by a rigid composite (5) i.e. bidirectional woven fiberglass composite plate while the top surface is flexible. Pressurized air has been inserted into this hemisphere because in application where there is need to measure high pressures, the bearing area will be deformed and the sensors will not work linearly any longer if this pressurized air is not inserted.
  • the pressure sensor in the bubble is responsible for determining the absolute pressure amount of the air inside the bubble and measuring its changes.
  • a lithium polymer battery has been placed beside this sensor which has special geometry (6) i.e. semidonut shape in accordance with the bubble dimensions which are 5 to 7 centimetres in diameter depending on the application.
  • the bubble is completely sealed and has no way out.
  • a wireless charging kit will charge the battery which its receiver is placed under the battery.
  • a bluetooth low energy module will collect data i.e. the absolute pressure inside the bubble and send them outside the bubble.
  • the device has been designed in such a way that the durability of battery is more than one year for normal usages with the rate of 1 pulse per second for sending data.
  • the amount of consumption of the internal processor and the BLE (Bluetooth Low Energy) device has been exactly calculated.
  • the data is sent every 5 seconds and each data packet sent each 5 seconds contains the information of previous 10 seconds to prevent data loss.
  • the consuming and needed power of the battery has been calculated to be 2.5 to 3 mAh per day so that if a 1200 mA battery is used, the device can be working continuously for 12 to 15 months.
  • Unlimited number of sensors can be used in a network with the aid of a Bluetooth modem and its data can be shared with other parts of the network.
  • This invention has been designed and produced with a special shape. Due to this shape, all external pressures exerted from all directions are transferred to the internal pressurized space entirely uniformly with equal ration. As a result, this sensor acts alike in different applications and in contact with different surfaces.
  • SMD miniature sensors inside the device has both analogue and digital output.
  • the type of output is up to method of functioning, precision, and noise conditions of the environment.
  • the output of the Bluetooth low energy module is digital, the internal processor can process both digital and analogue data received from the sensors.
  • the invention is highly customizable for various kinds of application depending on the type and working range of the sensors and internal components.
  • This sensor can be connected to and working with a wide range of internal sensors with diverse powers. It can also be connected to ultrasound and infrared sensors in series or parallel configuration.
  • the external shell has been made of polyurethane or any other flexible rubber which has the capability of coating for surface hardening and increasing anti-wear properties.
  • the battery can work for up to 12 months with single charging depending on the volume of the sending signal and considering the controlled consumption. In other words, the sensor doesn’t require re-charging for 12 months during which the data is sent with the same precision.
  • the sensor can be working in temperature ranging from -10°C to +55°C properly depending on the electronic components employed.
  • This sensor can be calibrated while working without needing to be turned off. Moreover, parameters and initial calculating constants can be determined via the mutual Bluetooth sending gateway at any time.
  • the modem of this invention can be connected to unlimited number of sensors. It can also connect to Wi-Fi and mobile phone data network to share the data to any server or network.
  • the sensor can be programmed perfectly. Therefore, it can be employed in various working environments and applications as well as diverse data gatherings.
  • the sensor’s data can be received raw or processed on its specially designed mobile application and online portal for the users and clients.
  • the data receiving gateway can be customized on demand.
  • Fig 1 The hemisphere/flexible integral shell, the rigid plate level and placement of all components within the bubble.
  • Fig 2. A network of sensors connected to a Bluetooth modem via Wi-Fi for sending online data.
  • Fig 1. Illustrates the sensor in general.
  • the external surface of sensor is made of Polyurethane or any other kind of flexible rubber.
  • (2) is the cut view of the sensor. The exact position of all parts are shown here. The aim of this positioning is to achieve an arrangement that takes up the minimum space. Since the top level is flexible, it should have no contact with the internal components in the case of loading so that it can show all of the exerted pressure as increase in pressure of the air inside the bubble. The position of the donut-shaped battery, the absolute pressure sensor in the center of the bubble and electronic parts including CPU, battery charging circuit, and Bluetooth signal transducer are observable.
  • Fig 2. Demonstrates a network of sensors and their connection to a Bluetooth Modem via Wi-Fi.
  • any number of sensors can be connected to each other to form a network of any desirable size and number for any desirable purpose. These sensors can send their data with customizable ratio as well as simultaneously. Increasing the number of sensors in a network can increase the accuracy of estimating the continuous pressure distribution. In fact, the proper number of sensors and the desirable accuracy is dependent on the kind of application, environmental conditions, the surface contacting the sensors (being flexible or rigid and the degree of flexibility), etc. If sufficient number of sensors are being used, a proper estimation of weight and its changes can be measured by them as they are installed beneath anything, receiving the pressure and play the role of an elastic foundation.
  • This modem can be connected to numerous sensors regarding its band width. It has an internal Wi-Fi network and can be connected to internet directly using a sim card. The modem can collect sensors’ data online, compile them with other probable sensors’ data, and share them with other section or release them on any desirable server or network using internet.
  • Fig 3. Exhibits the exploded view of internal components of the sensor.
  • (1) is the cutaway view of the external shell that covers all of the external surface of the sensor and its components. It is made of polyurethane or any other flexible rubber and is manufactured through direct plastic injection, hot isostatic pressing or thermal spraying on the mold.
  • (2) is the main electronic board consisting of the main processor, internal accessible memory, and Bluetooth low-energy module for sending data.
  • This board is designed and produced completely on-demand and is customizable according to the dimension and size of the sensors to take up the minimum space.
  • (3) shows the wireless charger circuit of the internal battery and the coil of the receiver board.
  • This copper coil receives electromagnetic waves from the wireless charger and turn them to voltage and current to charge the battery.
  • a regulator circuit for voltage and current has been placed in coil circuit to facilitate the charging and preserving the battery.
  • This miniature sensor is capable of sensing the environment’s air pressure with high precision. Its performance range, sensor’s application and the range of external pressure exerted to the sensor are all customizable and can be changed in accordance to the bubble’s internal pressure.
  • (6) is the battery with special geometry customized for this sensor.
  • a single-cell lithium polymer battery has been used in the sensor with the following properties: voltage: 3.7 V, number of charging and de-charging: over than 500 times, without voltage drop.
  • this battery is connected to both power supply circuit of the main board and the wireless charging circuit concurrently. This battery has the capacity of working for more than 12 months with single charging in the case of sending 1 sample per second to the Bluetooth modem.
  • Fig 4. Shows that the invention is omni-directional i.e. it can receive the exerted force from different directions and sense the pressure with no difference. In fact, the direction has no effect on sensing.
  • Fig 5. Conveys the linear change in pressure for different cross sections that don’t exceed the sensor cell shape size. (1) Shows the figure. Different lines indicate different cross sections. Obviously, Al is the smallest and A3 is the largest cross sections applied to the sensor cell.
  • Fig 6. Displays the non-linear change in sensed pressure for a cross section which is larger than the sensor cell’s size.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention concerne un dispositif de détection de pression en forme de bulle. Ce dispositif comprend une coque intégrée souple (1), des éléments électroniques (2), une plaque rigide (5), une batterie (6), des unités de charge (3) et des capteurs (4). L'application de ce dispositif abordable sert à déterminer la quantité de pression de contact. Par conséquent, l'invention peut être utilisée dans une large gamme d'industries telles que la fabrication d'équipements médicaux nécessaires à la mesure de pression, la fabrication d'appareils électroménagers, en particulier en liaison avec un BMS (système de gestion de bâtiment) et les maisons intelligentes, l'industrie automobile, la fabrication de meubles tels que des chaises, des canapés et des lits, et tout autre domaine présentant la nécessité de mesurer la pression, en particulier la pression de contact. L'invention présente une précision élevée dans la mesure de la pression moyenne exercée sur sa surface en contact avec des surfaces rigides et pliables, car l'invention peut être placée sous n'importe quel type de matériau présentant n'importe quel type de caractéristiques. Afin de conserver son efficacité, le matériau utilisé lors de la production de cette invention est résistant aux rayures et de qualité élevée. Par conséquent, la fiabilité et l'accessibilité de cette technologie en forme de bulle ont été estimées de sorte à être idéalement élevées pendant son long cycle de vie. La fiabilité supérieure amène à un dispositif plus durable. L'invention présente de nombreuses nouvelles fonctions telles qu'une mise en réserve de sa charge de batterie sur une longue durée signifiant une action de charge peu fréquente, un envoi des données collectées au moyen des capteurs (4) vers n'importe quel dispositif connecté ou en nuage sans fil, et une utilisation collective sans aucune limitation. Ce dernier signifie qu'un grand nombre de ces kits de capteurs (4) peut être utilisé conjointement en tant que réseau. Ce nombre de personnalisations permet à l'utilisateur d'optimiser le dispositif pour des objectifs personnels souhaités conformément à leurs besoins, la charge de travail, la quantité d'exactitude et de précision, et la configuration requise. De façon intéressante, ces cellules de capteurs (4) peuvent être connectées les unes aux autres et à tout autre capteur, y compris des capteurs ultrasonores et infrarouges selon une configuration en série ou en parallèle. Cette configuration dépend de l'application. Si d'autres capteurs ou dispositifs doivent être corrigés ou validés par intermédiaire des nôtres, ils doivent être connectés en parallèle. Sinon, s'ils doivent fonctionner les uns avec les autres, la configuration en série est recommandée.
PCT/IB2022/059658 2021-10-08 2022-10-08 Capteur en forme de bulle pour mesurer une force et une pression de contact omnidirectionnelles Ceased WO2023058001A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT117507 2021-10-08
PT117507A PT117507A (pt) 2021-10-08 2021-10-08 Sensor em forma de bolha para medir a pressão e força de contato omnidirecional

Publications (1)

Publication Number Publication Date
WO2023058001A1 true WO2023058001A1 (fr) 2023-04-13

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PT (1) PT117507A (fr)
WO (1) WO2023058001A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4478019A1 (fr) * 2023-06-16 2024-12-18 Paul Hartmann AG Unité de mesure de pression mobile pour mesurer la pression d'une liaison de compression médicale sur une extrémité

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747313A (en) 1986-01-13 1988-05-31 Agency Of Industrial Science And Technology Tactile sensor
US6550344B2 (en) 2001-05-04 2003-04-22 Rosemount Aerospace Inc. Semi-flush air data sensor
US7426873B1 (en) * 2006-05-04 2008-09-23 Sandia Corporation Micro electro-mechanical system (MEMS) pressure sensor for footwear
US20090320611A1 (en) 2006-11-30 2009-12-31 Vasarhelyi Gabor Elastic covering for tactile sensors and tactile sensor array with elastic covering
US7701202B2 (en) 2006-11-02 2010-04-20 Massachusetts Institute Of Technology Compliant tactile sensor that delivers a force vector
US20140260678A1 (en) * 2013-03-15 2014-09-18 President And Fellows Of Harvard College Tactile sensor
WO2016145790A1 (fr) * 2015-03-18 2016-09-22 常州春水堂商贸有限公司 Appareil du type coussin gonflable
WO2019161277A1 (fr) * 2018-02-16 2019-08-22 Northwestern University Capteurs médicaux sans fil et méthodes associées

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747313A (en) 1986-01-13 1988-05-31 Agency Of Industrial Science And Technology Tactile sensor
US6550344B2 (en) 2001-05-04 2003-04-22 Rosemount Aerospace Inc. Semi-flush air data sensor
US7426873B1 (en) * 2006-05-04 2008-09-23 Sandia Corporation Micro electro-mechanical system (MEMS) pressure sensor for footwear
US7701202B2 (en) 2006-11-02 2010-04-20 Massachusetts Institute Of Technology Compliant tactile sensor that delivers a force vector
US20090320611A1 (en) 2006-11-30 2009-12-31 Vasarhelyi Gabor Elastic covering for tactile sensors and tactile sensor array with elastic covering
US20140260678A1 (en) * 2013-03-15 2014-09-18 President And Fellows Of Harvard College Tactile sensor
WO2016145790A1 (fr) * 2015-03-18 2016-09-22 常州春水堂商贸有限公司 Appareil du type coussin gonflable
WO2019161277A1 (fr) * 2018-02-16 2019-08-22 Northwestern University Capteurs médicaux sans fil et méthodes associées

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4478019A1 (fr) * 2023-06-16 2024-12-18 Paul Hartmann AG Unité de mesure de pression mobile pour mesurer la pression d'une liaison de compression médicale sur une extrémité
WO2024256679A1 (fr) * 2023-06-16 2024-12-19 Paul Hartmann Ag Unité de mesure de pression mobile pour mesure de pression d'un bandage de compression médicale sur un membre

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Publication number Publication date
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