WO2021246277A1 - Capteur intelligent - Google Patents

Capteur intelligent Download PDF

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Publication number
WO2021246277A1
WO2021246277A1 PCT/JP2021/020164 JP2021020164W WO2021246277A1 WO 2021246277 A1 WO2021246277 A1 WO 2021246277A1 JP 2021020164 W JP2021020164 W JP 2021020164W WO 2021246277 A1 WO2021246277 A1 WO 2021246277A1
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WO
WIPO (PCT)
Prior art keywords
liquid
viscosity
oil
unit
abnormal
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PCT/JP2021/020164
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English (en)
Japanese (ja)
Inventor
俊輔 小寺
Original Assignee
株式会社村田製作所
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Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2021246277A1 publication Critical patent/WO2021246277A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • 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
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path

Definitions

  • the present invention relates to a smart sensor, and more particularly to a smart sensor that detects the viscosity of a liquid or the like.
  • a sensor that detects temperature, pressure, viscosity, etc. and converts it into a signal such as voltage, current, etc.
  • a microcomputer having processing functions such as analysis and information processing (for example, calibration function, compensation function, etc.)
  • analysis and information processing for example, calibration function, compensation function, etc.
  • Patent Document 1 discloses a smart sensor for liquid analysis, which includes a liquid analysis sensor and an intelligence unit integrated with the liquid analysis sensor, and signals the measurement result of the liquid analysis sensor with the intelligence unit.
  • the intelligence unit includes a signal adjustment unit that adjusts the level, span, range, etc. of the measurement result of the liquid analysis sensor, a data conversion unit that converts the adjusted measurement result into a digital signal, and a converted digital unit. It is equipped with a control / data processing unit that executes signal calculation processing, an interface unit that outputs to the converter, and a memory that holds the calibration values of the application program and liquid analysis sensor used by the control / data processing unit. Has been done. The digital data processed by the intelligence unit is converted into a transmission signal by the converter and output to the outside.
  • the intelligence part is integrated with the liquid analysis sensor to prevent the influence of external noise on the weak signal of the liquid analysis sensor, and the calibration value unique to each liquid analysis sensor is stored in the memory. It is retained and the configuration of the converter is standardized.
  • the present invention has been made to solve the above problems, can reduce the man-hours and processing load of creating an application (software) using a smart sensor, and improve the versatility and convenience of the smart sensor.
  • the purpose is to provide a smart sensor capable of.
  • the smart sensor has an input that accepts an input of a viscosity detection unit that detects the viscosity of a liquid and a determination threshold value for determining whether or not the viscosity of the liquid detected by the viscosity detection unit is abnormal.
  • the determination unit that determines whether or not the viscosity of the liquid is abnormal by comparing the viscosity of the liquid with the determination threshold, the detection result of the viscosity of the liquid, and / or the viscosity of the liquid is abnormal. It is characterized in that it is provided with an output unit that outputs a determination result as to whether or not it is.
  • the viscosity of the liquid is detected, and the input of the determination threshold value for determining whether or not the viscosity of the detected liquid is abnormal is accepted, and the viscosity of the liquid is received. Is compared with the determination threshold value, and it is determined whether or not the viscosity of the liquid is abnormal. Then, the detection result of the viscosity of the liquid and / or the determination result of whether or not the viscosity of the liquid is abnormal is output. That is, when the determination threshold value is input, the viscosity of the liquid is automatically detected, the presence or absence of an abnormality in the viscosity of the liquid is determined, and the result (detection result / determination result) is output.
  • the judgment threshold value can be arbitrarily set / changed, so that the judgment threshold value suitable for each user can be set / changed, and the versatility and convenience can be improved. can.
  • the smart sensor since the abnormality in the viscosity of the liquid is automatically determined, there is no need to determine the abnormality on the user's application (software) side (that is, there is no need to create an application (software)), and the smart sensor can be used. It is possible to reduce the man-hours for creating the application (software) to be used. Further, since the abnormality is automatically determined and the determination result is notified, the processing load of the application (software) using the smart sensor can be reduced.
  • the viscosity includes absolute viscosity and kinematic viscosity (absolute viscosity divided by density).
  • the man-hours and processing load of creating an application (software) using the smart sensor can be reduced, and the versatility and convenience of the smart sensor can be improved. Is possible.
  • FIG. 1 is a block diagram showing a functional configuration of the smart sensor 1.
  • FIG. 2 is a block diagram showing a functional configuration of the storage unit 22 constituting the smart sensor 1.
  • the smart sensor 1 mainly includes a viscosity detection unit 11 that detects the viscosity of a liquid, a temperature detection unit 12 that detects the temperature of a liquid, a dielectric constant detection unit 13 that detects the dielectric constant of a liquid, and the viscosity and dielectric of the detected liquid. It is configured to include an information processing unit 20 that determines whether or not the viscosity / dielectric constant is abnormal based on the rate and temperature, and a power supply unit 25 that includes, for example, a regulated IC and supplies power to the information processing unit 20 and the like. Has been done. Further, the information processing unit 20 is composed of, for example, an MCU (MicroControl Unit), and functionally has an input unit 21, a storage unit 22, a determination unit 23, and an output unit 24. Hereinafter, each component will be described in detail.
  • MCU MicroControl Unit
  • the viscosity detection unit 11 detects the viscosity (absolute viscosity, kinematic viscosity) of a liquid such as oil (lubricating oil / hydraulic oil). At that time, the viscosity detection unit 11 detects the viscosity of a liquid such as oil at each accepted cycle (details will be described later).
  • a known ultrasonic type or SAW type viscosity sensor can be used as the viscosity detection unit 11 .
  • the viscosity detection unit 11 is electrically connected to the information processing unit (MCU) 20, and an electric signal (voltage value or the like) corresponding to the viscosity of a liquid such as oil is converted into digital data by the information processing unit 20. ..
  • the temperature detection unit 12 detects the temperature of a liquid such as oil. At that time, the temperature detection unit 12 detects the temperature of a liquid such as oil in each accepted cycle (details will be described later).
  • the temperature detecting unit 12 for example, a thermistor or a resistance temperature detector whose resistance value changes depending on the temperature is preferably used.
  • the temperature detection unit 12 is electrically connected to the information processing unit (MCU) 20, and an electric signal (voltage value or the like) corresponding to the temperature is converted into digital data by the information processing unit 20.
  • the permittivity detection unit 13 detects the permittivity of a liquid such as oil. At that time, the dielectric constant detection unit 13 detects the dielectric constant of a liquid such as oil for each accepted cycle (details will be described later).
  • the dielectric constant detection unit 13 has, for example, a pair of electrodes, and detects the dielectric constant by applying an AC signal to the pair of electrodes and measuring the impedance.
  • the permittivity detection unit 13 is electrically connected to the information processing unit (MCU) 20, and an electric signal corresponding to the permittivity of a liquid such as oil is converted into digital data by the information processing unit 20.
  • MCU information processing unit
  • the information processing unit 20 mainly includes a microprocessor that performs calculations, an EEPROM that stores a program or the like for causing the microprocessor to execute each process, and the like. As described above, the information processing unit 20 determines whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal (whether or not the oil has deteriorated).
  • the information processing unit 20 has a function of reducing the man-hours and processing load of creating an application (software) using the smart sensor 1 and improving the versatility and convenience of the smart sensor 1. Therefore, the information processing unit 20 functionally has an input unit 21, a storage unit 22, a determination unit 23, and an output unit 24.
  • the functions of the input unit 21, the storage unit 22, the determination unit 23, and the output unit 24 are realized by executing the program stored in the EEPROM or the like by the microprocessor.
  • the input unit 21 is connected to the electronic control unit (ECU) / host computer (PC) 30 (hereinafter referred to as the electronic control device 30) so as to be able to communicate with each other via a communication line 50 such as CAN (Control Area Network).
  • CAN Control Area Network
  • the communication line 50 is not limited to CAN, and for example, Ethernet, UART (Universal Asynchronous Receiver Transmitter), port connection (more specifically, deterioration determination result by voltage level (High / Low), etc.) can be obtained.
  • (Output), BT (Bluetooth (registered trademark)) and the like can also be used.
  • the input unit 21 has each determination threshold value for determining whether or not the viscosity / permittivity of a liquid such as oil, which is output (transmitted) from the electronic control device 30, is abnormal, and oil and the like.
  • Each cycle (detection cycle) for detecting the viscosity, permittivity, etc. of the liquid is received (note that both cycles may be the same or different). That is, the user of the electronic control device 30 detects a determination threshold value for determining whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal, and the viscosity / dielectric constant of a liquid such as oil.
  • the cycle (detection cycle) to be used can be changed arbitrarily.
  • the input unit 21 detects the viscosity / permittivity of the liquid such as oil output (transmitted) from the electronic control device 30, and whether the viscosity / permittivity of the liquid such as oil is abnormal. Accepts the input of the output request requesting the output of the judgment result of (whether the oil is deteriorated or not).
  • the determination threshold value and the cycle received by the input unit 21 are output to the storage unit 22 and stored (stored) in the storage unit 22. Further, the request information received by the input unit 21 is output to the output unit 24.
  • the storage unit 22 is composed of, for example, a memory such as EEPROM or SRAM. As the storage unit 22, an external memory provided outside the MCU may be used.
  • the storage unit 22 stores (stores) the accepted determination threshold value and the cycle. Further, the storage unit 22 determines the detection result of the viscosity / dielectric constant of the liquid such as oil, and whether the viscosity / dielectric constant of the liquid such as oil is abnormal (whether the oil has deteriorated). Stores (stores) the judgment results and the like.
  • the storage unit 22 functionally has a detection value storage area 22a, a determination threshold value storage area 22b, a periodic storage area 22c, and a status storage area 22d.
  • the detected value storage area 22a is an area for storing (storing) the detected values of the viscosity, dielectric constant, and temperature of a liquid such as oil that has been detected and converted into digital data by the information processing unit 20.
  • the determination threshold storage area 22b is for determining whether or not the viscosity / permittivity of the liquid such as oil is abnormal (whether the viscosity / permittivity of the liquid such as oil is within the normal range). This area stores (stores) the judgment threshold value.
  • the period storage area 22c stores (stores) a cycle for detecting the viscosity / dielectric constant of a liquid such as oil and a cycle for determining whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal. Is.
  • the status storage area 22d stores, for example, the viscosity / dielectric constant of a liquid such as oil, the determination result of whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal, the detection frequency, the self-diagnosis result, and the like. ..
  • the self-diagnosis result is a result of the information processing unit 20 monitoring the state of the viscosity detection unit 11 and the like and diagnosing whether or not it is operating normally. It should be noted that the detection values such as the determination threshold value, the period, the viscosity / dielectric constant of the liquid such as oil, and various information (data) such as the determination result stored (stored) in each storage area of the storage unit 22. ) Is read by the determination unit 23 and the output unit 24.
  • the determination unit 23 compares the viscosity of the liquid such as oil with the determination threshold value, and determines whether the viscosity of the liquid such as oil is abnormal (whether the viscosity of the liquid such as oil is within the normal range). Whether or not), that is, whether or not the oil has deteriorated is determined. More specifically, in the determination unit 23, the viscosity of the liquid such as oil is equal to or higher than the lower first threshold value and is higher than the upper threshold value (that is, larger than the first threshold value). When it is equal to or less than the value (when it is within the normal range), it is determined that the viscosity of the liquid such as oil is normal (the oil has not deteriorated).
  • the determination unit 23 indicates that the viscosity of the liquid such as oil is abnormal. It is determined that there is (oil has deteriorated). Further, the determination unit 23 determines whether or not the viscosity of the liquid such as oil is abnormal (whether or not the oil has deteriorated) at each cycle.
  • the determination unit 23 compares the dielectric constant of the liquid such as oil with the determination threshold value in the same manner as the above-mentioned viscosity, and determines whether or not the dielectric constant of the liquid such as oil is abnormal (oil). Whether or not the permittivity of the liquid such as is within the normal range), that is, whether or not the oil has deteriorated is determined. It should be noted that the determination as to whether or not the oil has deteriorated may be performed based only on the viscosity, or may be performed by combining the viscosity and the dielectric constant.
  • the determination unit 23 corrects the determination threshold value (first threshold value and second threshold value) based on the temperature of the liquid such as oil, and the viscosity / dielectric constant of the liquid such as oil. And the corrected determination threshold value are compared to determine whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal (whether or not the oil has deteriorated).
  • the determination result is stored in the storage unit 22 and output to the output unit 24.
  • the output unit 24 is communicably connected to the electronic control device 30 via, for example, a communication line 50 such as CAN.
  • the output unit 24 detects the viscosity / dielectric constant of the liquid such as oil, and determines whether the viscosity / dielectric constant of the liquid such as oil is abnormal (whether the oil is deteriorated) or the like. Is output (transmitted) to the electronic control device 30.
  • the output unit 24 when it is determined that the viscosity / dielectric constant of a liquid such as oil is abnormal (oil has deteriorated), the output unit 24 has information (warning information) such as a flag indicating that fact. ) Is output (sent). Further, the output unit 24 determines the detection result of the viscosity / dielectric constant of the liquid such as oil and whether or not the viscosity / dielectric constant of the liquid such as oil is abnormal (whether or not the oil is deteriorated). When an output request requesting output of the result is received, the detection result stored (stored) in the storage unit 22 and the determination result are output (transmitted).
  • the output unit 24 detects the viscosity / dielectric constant of the liquid such as oil and whether or not the viscosity / dielectric constant of the liquid such as oil is abnormal (whether the oil is deteriorated or not) at each cycle. The determination result of (whether or not) may be output (transmitted).
  • FIG. 3 is a flowchart showing a processing procedure of viscosity / dielectric constant abnormality (oil deterioration) determination processing by the smart sensor 1.
  • each determination threshold value for determining whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal, and the viscosity / dielectric constant of the liquid such as oil are detected.
  • Each cycle (detection cycle) is transmitted (step S100).
  • the transmitted determination threshold value and cycle are received by the smart sensor 1 and stored (stored) in the storage unit 22 (step S102).
  • the viscosity / dielectric constant of a liquid such as oil is detected according to the received cycle (detection), and the detected value is stored (stored) (step S104).
  • the detected viscosity / permittivity of the liquid such as oil is compared with the judgment threshold value, and whether or not the viscosity / permittivity of the detected liquid such as oil is abnormal (whether the oil is deteriorated or not). Is determined (step S106).
  • the process proceeds to step S114.
  • the viscosity / permittivity of a liquid such as oil is abnormal (when the oil is deteriorated)
  • the viscosity / permittivity of the liquid such as oil is abnormal (the oil is deteriorated).
  • the electronic control device 30 that has received information (for example, a flag) indicating that the viscosity / dielectric constant of the liquid such as oil is abnormal (for example, the flag) is the viscosity / dielectric constant of the liquid such as oil. Presenting (warning) to the user that the dielectric constant is abnormal (oil has deteriorated) (step S112).
  • information for example, a flag
  • the flag is the viscosity / dielectric constant of the liquid such as oil.
  • step S114 it is then determined whether or not the next detection timing (cycle) has come (step S114). If the next detection timing (cycle) has not yet arrived, this step is repeatedly executed until the next detection timing (cycle) arrives. On the other hand, when the next detection timing (cycle) comes, the process shifts to step S104, and the processes of steps S104 to S108 described above are repeatedly executed.
  • the viscosity / permittivity of the detected liquid such as oil is abnormal and the viscosity / permittivity of the detected liquid such as oil is abnormal.
  • the input of the judgment threshold value for judging is accepted, the viscosity / permittivity of the liquid such as oil is compared with the judgment threshold value, and whether or not the viscosity / permittivity of the liquid such as oil is abnormal. Is determined. Then, the detection result of the viscosity / dielectric constant of the liquid such as oil and the determination result of whether or not the viscosity / dielectric constant of the liquid such as oil is abnormal are output.
  • the judgment threshold value can be arbitrarily set / changed, the judgment threshold value suitable for each user can be set / changed, and the versatility and convenience can be improved.
  • the judgment threshold value since it automatically determines abnormalities in the viscosity and permittivity of liquids such as oil, there is no need to determine abnormalities on the user's application (software) side (that is, it is necessary to create an application (software).
  • it is possible to reduce the number of steps for creating an application (software) that uses the smart sensor 1.
  • the processing load of the application (software) using the smart sensor 1 can be reduced. As a result, the man-hours and processing load for creating an application (software) using the smart sensor 1 can be reduced, and the versatility and convenience of the smart sensor 1 can be improved.
  • the input of the cycle for detecting the viscosity / dielectric constant of the liquid such as oil is accepted, and the viscosity / dielectric constant of the liquid such as oil is detected for each accepted cycle, and the accepted cycle is received.
  • the cycle for detecting the viscosity / dielectric constant and the cycle for determining whether or not the viscosity / dielectric constant is abnormal can be arbitrarily set / changed.
  • the user does not need to create and incorporate an application (software) for periodically detecting the viscosity, dielectric constant, etc. of a liquid such as oil.
  • the processing load of the application (software) using the smart sensor 1 can be reduced. As a result, the versatility and convenience of the smart sensor 1 can be further improved.
  • the determination threshold value is corrected based on the temperature of the liquid such as oil, and the viscosity / permittivity of the liquid such as oil is compared with the corrected determination threshold value to obtain oil. It is determined whether or not the viscosity / permittivity of the liquid such as is abnormal. Therefore, it is possible to more accurately determine an abnormality (deterioration) in the viscosity and dielectric constant of a liquid such as oil.
  • the electronic control device 30 can quickly recognize that the viscosity and dielectric constant of the liquid such as oil are abnormal (the oil is deteriorated).
  • the detection result of the viscosity / dielectric constant of a liquid such as oil and the determination result are stored, and the detection result of the viscosity / dielectric constant of the liquid such as oil and the output of the determination result are requested.
  • the output request is accepted, the stored detection result and the determination result are output. Therefore, the electronic control device 30 can receive the above-mentioned various information at a necessary timing.
  • the present invention is not limited to the above embodiments and can be modified in various ways.
  • an ultrasonic type or SAW type sensor is adopted as the viscosity sensor (viscosity detection unit 11), but the viscosity sensor is not limited to the ultrasonic type or SAW type, and is of another type. Sensors can also be used.
  • CAN Serial Communication Interface
  • SPI Serial Communication Interface
  • the user after purchasing the smart sensor 1, the user writes a value corresponding to the desired interface in the interface setting register using the default interface, for example, in a mass production line or the like. After that, for example, the smart sensor 1 is mounted on a construction machine or the like. After mounting, communication is performed according to the interface of the electronic control device 30 (host side). By doing so, since the user can select the interface of the smart sensor 1, it becomes easy to select the LSI of the electronic control device 30 (it is also possible to use an LSI that does not support CAN communication), and the design is free. The degree is improved.

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Abstract

L'invention concerne un capteur intelligent (1) comprenant : un détecteur de viscosité (11) destiné à détecter la viscosité d'un liquide ; une unité d'entrée (21) destinée à recevoir une valeur seuil de détermination de manière à déterminer si la viscosité du liquide est anormale ou non ; une unité de détermination (23) destinée à déterminer si la viscosité du liquide est anormale ou non en comparant la viscosité détectée du liquide avec la valeur seuil de détermination ; et une unité de sortie (24) destinée à produire le résultat de détection de la viscosité du liquide et le résultat de détermination indiquant si la viscosité du liquide est anormale ou non.
PCT/JP2021/020164 2020-06-01 2021-05-27 Capteur intelligent WO2021246277A1 (fr)

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JP2020-095261 2020-06-01
JP2020095261 2020-06-01

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WO2021246277A1 true WO2021246277A1 (fr) 2021-12-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116297013A (zh) * 2023-05-19 2023-06-23 卡松科技股份有限公司 一种液压油粘度波动的监测方法及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007013655A (ja) * 2005-06-30 2007-01-18 Sunx Ltd 検出センサ
US20100122571A1 (en) * 2008-11-19 2010-05-20 Gm Global Technology Operations, Inc. Method and system for estimating engine oil life based on viscosity
WO2014002650A1 (fr) * 2012-06-25 2014-01-03 セイコーインスツル株式会社 Unité piézoélectrique, dispositif piézoélectrique, dispositif de détermination piézoélectrique et procédé de détermination d'état
WO2019021502A1 (fr) * 2017-07-28 2019-01-31 日立建機株式会社 Système de diagnostic d'huile
JP2019511728A (ja) * 2016-01-19 2019-04-25 サウジ アラビアン オイル カンパニー 蛍光立上がり時間を用いた油の劣化判定

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007013655A (ja) * 2005-06-30 2007-01-18 Sunx Ltd 検出センサ
US20100122571A1 (en) * 2008-11-19 2010-05-20 Gm Global Technology Operations, Inc. Method and system for estimating engine oil life based on viscosity
WO2014002650A1 (fr) * 2012-06-25 2014-01-03 セイコーインスツル株式会社 Unité piézoélectrique, dispositif piézoélectrique, dispositif de détermination piézoélectrique et procédé de détermination d'état
JP2019511728A (ja) * 2016-01-19 2019-04-25 サウジ アラビアン オイル カンパニー 蛍光立上がり時間を用いた油の劣化判定
WO2019021502A1 (fr) * 2017-07-28 2019-01-31 日立建機株式会社 Système de diagnostic d'huile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116297013A (zh) * 2023-05-19 2023-06-23 卡松科技股份有限公司 一种液压油粘度波动的监测方法及系统
CN116297013B (zh) * 2023-05-19 2023-09-26 卡松科技股份有限公司 一种液压油粘度波动的监测方法及系统

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