WO2021246277A1 - Smart sensor - Google Patents

Smart sensor 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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Prior art keywords
liquid
viscosity
oil
unit
abnormal
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PCT/JP2021/020164
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French (fr)
Japanese (ja)
Inventor
俊輔 小寺
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株式会社村田製作所
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Publication of WO2021246277A1 publication Critical patent/WO2021246277A1/en

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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.

Abstract

Provided is a smart sensor (1) comprising: a viscosity detector (11) for detecting the viscosity of a liquid; an input unit (21) for receiving a determination threshold value for determining whether or not the viscosity of the liquid is abnormal; a determination unit (23) for determining whether or not the viscosity of the liquid is abnormal by comparing the detected viscosity of the liquid with the determination threshold value; and an output unit (24) for outputting the detection result of the viscosity of the liquid and the determination result of whether or not the viscosity of the liquid is abnormal.

Description

スマートセンサSmart sensor
　本発明は、スマートセンサに関し、特に、液体の粘度等を検出するスマートセンサに関する。 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.
　近年、例えば、温度や圧力、粘度等を検知して電圧や電流等の信号に変換するセンサに、例えば、解析や情報処理等の処理機能（例えば校正機能や補償機能等）を有するマイクロコンピュータを付加したスマートセンサ（インテリジェントセンサ）が提案されている。 In recent years, for example, a sensor that detects temperature, pressure, viscosity, etc. and converts it into a signal such as voltage, current, etc., for example, a microcomputer having processing functions such as analysis and information processing (for example, calibration function, compensation function, etc.) An added smart sensor (intelligent sensor) has been proposed.
　ここで、特許文献１には、液分析センサと、該液分析センサと一体化されたインテリジェンス部とを備え、液分析センサの測定結果をインテリジェンス部で信号処理する液分析用スマートセンサが開示されている。より詳細には、インテリジェンス部は、液分析センサの測定結果のレベル、スパン、レンジ等を調整する信号調整部と、調整された測定結果をディジタル信号に変換するデータ変換部と、変換されたディジタル信号の演算処理等を実行する制御・データ処理部と、変換器に出力するインターフェイス部と、制御・データ処理部が利用するアプリケーションプログラムや液分析センサの校正値を保持するメモリとを備えて構成されている。なお、インテリジェンス部で処理されたディジタルデータは、変換器によって伝送信号に変換されて外部出力される。 Here, 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. ing. More specifically, 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.
　この液分析用スマートセンサでは、インテリジェンス部を液分析センサと一体化することにより、液分析センサの微弱信号への外部ノイズの影響を防止すると共に、液分析センサ毎に固有の校正値をメモリに保持させ、変換器の構成を標準化している。 In this smart sensor for liquid analysis, 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.
特開２０１３－１４２９６４号公報Japanese Unexamined Patent Publication No. 2013-142964
　しかしながら、上述した液分析用スマートセンサでは、例えば、検出値が異常であるか否かを判定するためのしきい値を任意に設定／変更し、自動的に異常を判定する機能等については考慮されていない。そのため、スマートセンサを利用するユーザ側でそのようなアプリケーション（ソフトウェア）を作成するとともに、ユーザのアプリケーション（ソフトウェア）側で上記しきい値の設定／変更や、異常の判定等を行う必要がある。よって、スマートセンサを利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減することができない。また、しきい値を任意に設定／変更できないため、汎用性や利便性が低い。そのため、スマートセンサを利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減でき、かつ、スマートセンサの汎用性や利便性を向上できる技術が要望されていた。 However, in the above-mentioned smart sensor for liquid analysis, for example, a function of arbitrarily setting / changing a threshold value for determining whether or not the detected value is abnormal and automatically determining the abnormality is considered. It has not been. Therefore, it is necessary for the user who uses the smart sensor to create such an application (software), and for the user's application (software) to set / change the above threshold value and determine an abnormality. Therefore, it is not possible to reduce the man-hours and processing load of creating an application (software) that uses a smart sensor. Moreover, since the threshold value cannot be set / changed arbitrarily, the versatility and convenience are low. Therefore, there has been a demand for a technology that can reduce the man-hours and processing load of creating an application (software) that uses a smart sensor, and can improve the versatility and convenience of the smart sensor.
　本発明は、上記問題点を解消する為になされたものであり、スマートセンサを利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減でき、かつ、スマートセンサの汎用性および利便性を向上することが可能なスマートセンサを提供することを目的とする。 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.
　本発明に係るスマートセンサは、液体の粘度を検出する粘度検出部と、粘度検出部により検出された液体の粘度が異常であるか否かを判定するための判定しきい値の入力を受け付ける入力部と、液体の粘度と判定しきい値とを比較して、液体の粘度が異常であるか否かを判定する判定部と、液体の粘度の検出結果、及び／又は、液体の粘度が異常であるか否かの判定結果を出力する出力部とを備えることを特徴とする。 The smart sensor according to the present invention 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.
　本発明に係るスマートセンサによれば、液体の粘度が検出されるとともに、検出された液体の粘度が異常であるか否かを判定するための判定しきい値の入力が受け付けられ、液体の粘度と判定しきい値とが比較されて、液体の粘度が異常であるか否かが判定される。そして、液体の粘度の検出結果、及び／又は、液体の粘度が異常であるか否かの判定結果が出力される。すなわち、判定しきい値を入力すると、自動的に液体の粘度が検出されるとともに、液体の粘度の異常の有無が判定され、その結果（検出結果・判定結果）が出力される。 According to the smart sensor according to the present invention, 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.
　よって、本発明に係るスマートセンサによれば、判定しきい値を任意に設定／変更できるため、ユーザ毎に適した判定しきい値を設定／変更でき、汎用性及び利便性を向上することができる。また、自動的に液体の粘度の異常を判定してくれるため、ユーザのアプリケーション（ソフトウェア）側で異常を判定する必要がなく（すなわち、アプリケーション（ソフトウェア）を作成する必要がなく）、スマートセンサを利用するアプリケーション（ソフトウェア）の作成工数を低減することができる。さらに、自動的に異常を判定して、その判定結果を知らせてくれるため、スマートセンサを利用するアプリケーション（ソフトウェア）の処理負荷を低減することができる。その結果、スマートセンサを利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減でき、かつ、スマートセンサの汎用性および利便性を向上することが可能となる。なお、本明細書において、粘度には、絶対粘度及び動粘度（絶対粘度を密度で除算したもの）を含む。 Therefore, according to the smart sensor according to the present invention, 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. In addition, 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. As a result, it is possible to reduce the man-hours and processing load of creating an application (software) using the smart sensor, and to improve the versatility and convenience of the smart sensor. In the present specification, the viscosity includes absolute viscosity and kinematic viscosity (absolute viscosity divided by density).
　本発明によれば、液体の粘度等を検出するスマートセンサにおいて、スマートセンサを利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減でき、かつ、スマートセンサの汎用性および利便性を向上することが可能となる。 According to the present invention, in a smart sensor that detects the viscosity of a liquid, 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.
実施形態に係るスマートセンサの機能構成を示すブロック図である。It is a block diagram which shows the functional structure of the smart sensor which concerns on embodiment. 実施形態に係るスマートセンサを構成する記憶部の機能構成を示すブロック図である。It is a block diagram which shows the functional structure of the storage part which comprises the smart sensor which concerns on embodiment. 実施形態に係るスマートセンサによる粘度・誘電率異常（オイル劣化）判定処理の処理手順を示すフローチャートである。It is a flowchart which shows the processing procedure of the viscosity / dielectric constant abnormality (oil deterioration) determination processing by the smart sensor which concerns on embodiment.
　以下、図面を参照して本発明の好適な実施形態について詳細に説明する。なお、図中、同一又は相当部分には同一符号を用いることとする。また、各図において、同一要素には同一符号を付して重複する説明を省略する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the figure, the same reference numerals are used for the same or corresponding parts. Further, in each figure, the same elements are designated by the same reference numerals, and duplicate description will be omitted.
　まず、図１～図２を併せて用いて、実施形態に係るスマートセンサ１の構成について説明する。図１は、スマートセンサ１の機能構成を示すブロック図である。図２は、スマートセンサ１を構成する記憶部２２の機能構成を示すブロック図である。 First, the configuration of the smart sensor 1 according to the embodiment will be described with reference to FIGS. 1 and 2. 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.
　スマートセンサ１は、主として、液体の粘度を検出する粘度検出部１１、液体の温度を検出する温度検出部１２、液体の誘電率を検出する誘電率検出部１３、検出された液体の粘度、誘電率、温度に基づいて、粘度・誘電率が異常か否かを判定する情報処理部２０、及び、例えばレギュレートＩＣ等を含み情報処理部２０等に電力を供給する電源部２５を備えて構成されている。また、情報処理部２０は、例えば、ＭＣＵ（Ｍｉｃｒｏ　Ｃｏｎｔｒｏｌ　Ｕｎｉｔ）からなり、入力部２１、記憶部２２、判定部２３、及び、出力部２４を機能的に有している。以下、各構成要素について詳細に説明する。 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.
　粘度検出部１１は、例えばオイル（潤滑油・作動油）等の液体の粘度（絶対粘度、動粘度）を検出する。その際に、粘度検出部１１は、受け付けられた周期（詳細は後述する）毎に、オイル等の液体の粘度を検出する。粘度検出部１１としては、例えば、公知の超音波式やＳＡＷ式の粘度センサを用いることができる。粘度検出部１１は、情報処理部（ＭＣＵ）２０と電気的に接続されており、オイル等の液体の粘度に応じた電気信号（電圧値等）が情報処理部２０でデジタルデータに変換される。 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). As the viscosity detection unit 11, for example, a known ultrasonic type or SAW type viscosity sensor can be used. 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. ..
　温度検出部１２は、例えばオイル等の液体の温度を検出する。その際に、温度検出部１２は、受け付けられた周期（詳細は後述する）毎に、オイル等の液体の温度を検出する。温度検出部１２としては、例えば、温度によって抵抗値が変化するサーミスタや測温抵抗体などが好適に用いられる。温度検出部１２は、情報処理部（ＭＣＵ）２０と電気的に接続されており、温度に応じた電気信号（電圧値等）が情報処理部２０でデジタルデータに変換される。 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). As 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.
　誘電率検出部１３は、例えばオイル等の液体の誘電率を検出する。その際に、誘電率検出部１３は、受け付けられた周期（詳細は後述する）毎に、オイル等の液体の誘電率を検出する。誘電率検出部１３は、例えば、一対の電極を有し、該一対の電極にＡＣ信号を印加してインピーダンスを測定することにより誘電率を検出する。誘電率検出部１３は、情報処理部（ＭＣＵ）２０と電気的に接続されており、オイル等の液体の誘電率に応じた電気信号が情報処理部２０でデジタルデータに変換される。 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.
　情報処理部２０は、主として、演算を行うマイクロプロセッサ、該マイクロプロセッサに各処理を実行させるためのプログラム等を記憶するＥＥＰＲＯＭ等を有して構成されている。上述したように、情報処理部２０は、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）を判定する。 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).
　特に、情報処理部２０は、スマートセンサ１を利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減でき、かつ、スマートセンサ１の汎用性および利便性を向上する機能を有している。そのため、情報処理部２０は、入力部２１、記憶部２２、判定部２３、及び、出力部２４を機能的に有している。情報処理部２０では、ＥＥＰＲＯＭ等に記憶されているプログラムがマイクロプロセッサによって実行されることにより、入力部２１、記憶部２２、判定部２３、及び、出力部２４の機能が実現される。 In particular, 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. In the information processing unit 20, 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.
　入力部２１は、例えばＣＡＮ（Ｃｏｎｔｒｏｌｌｅｒ　Ａｒｅａ　Ｎｅｔｗｏｒｋ）等の通信回線５０を介して、電子制御装置（ＥＣＵ）／ホストコンピュータ（ＰＣ）３０（以下、電子制御装置３０という）と相互に通信可能に接続されている。なお、通信回線５０は、ＣＡＮに限られることなく、例えば、イーサネット（Ｅｔｈｅｒｎｅｔ）、ＵＡＲＴ（Ｕｎｉｖｅｒｓａｌ　Ａｓｙｎｃｈｒｏｎｏｕｓ　Ｒｅｃｅｉｖｅｒ　Ｔｒａｎｓｍｉｔｔｅｒ）、ポート接続（より具体的には電圧レベル（Ｈｉｇｈ／Ｌｏｗ）により劣化判定結果等を出力する）、及び、ＢＴ（Ｂｌｕｅｔｏｏｔｈ（登録商標））等を用いることもできる。 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). Has been done. 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.
　入力部２１は、電子制御装置３０から出力（送信）された、オイル等の液体の粘度・誘電率が異常であるか否かを判定するためのそれぞれの判定しきい値、及び、オイル等の液体の粘度・誘電率等を検出するそれぞれの周期（検出周期）を受信する（なお、双方の周期は同じであってもよいし、異なっていてもよい）。すなわち、電子制御装置３０のユーザは、オイル等の液体の粘度・誘電率が異常であるか否かを判定するための判定しきい値、及び、オイル等の液体の粘度・誘電率等を検出する周期（検出周期）を任意に変更することができる。 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.
　また、入力部２１は、電子制御装置３０から出力（送信）された、オイル等の液体の粘度・誘電率等の検出結果、及び、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）の判定結果の出力を要求する出力要求の入力を受け付ける。なお、入力部２１により受け付けられた判定しきい値、及び、周期は、記憶部２２に出力され、記憶部２２に格納（記憶）される。また、入力部２１により受け付けられた要求情報は、出力部２４に出力される。 Further, 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.
　記憶部２２は、例えば、ＥＥＰＲＯＭやＳＲＡＭ等のメモリからなる。なお、記憶部２２としては、ＭＣＵの外部に設けられた外部メモリを用いてもよい。記憶部２２は、受け付けられた判定しきい値、及び、周期を格納（記憶）する。また、記憶部２２は、オイル等の液体の粘度・誘電率等の検出結果、及び、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）の判定結果等を格納（記憶）する。 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.
　より詳細には、記憶部２２は、図２に示されるように、検出値格納領域２２ａ、判定しきい値格納領域２２ｂ、周期格納領域２２ｃ、及び、ステータス格納領域２２ｄを機能的に有している。検出値格納領域２２ａは、検出されて情報処理部２０でデジタルデータに変換されたオイル等の液体の粘度・誘電率・温度の検出値を格納（記憶）する領域である。判定しきい値格納領域２２ｂは、オイル等の液体の粘度・誘電率が異常であるか否か（オイル等の液体の粘度・誘電率が正常な範囲にあるか否か）を判定するための判定しきい値を格納（記憶）する領域である。周期格納領域２２ｃは、オイル等の液体の粘度・誘電率等を検出する周期、及び、オイル等の液体の粘度・誘電率が異常であるか否かを判定する周期を格納（記憶）する領域である。 More specifically, as shown in FIG. 2, 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. There is. 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.
　ステータス格納領域２２ｄは、例えば、オイル等の液体の粘度・誘電率、オイル等の液体の粘度・誘電率が異常であるか否かの判定結果、検出頻度、及び、自己診断結果等を格納する。なお、自己診断結果とは、情報処理部２０が、粘度検出部１１等の状態をモニタし、正常に動作しているか否かを診断した結果である。なお、記憶部２２の各格納領域に格納（記憶）されている、上記判定しきい値、周期、オイル等の液体の粘度・誘電率等の検出値、及び、判定結果等の各種情報（データ）は、判定部２３や出力部２４によって読み出される。 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.
　判定部２３は、オイル等の液体の粘度と、判定しきい値とを比較して、オイル等の液体の粘度が異常であるか否か（オイル等の液体の粘度が正常範囲内にあるか否か）、すなわち、オイルが劣化しているか否かを判定する。より具体的には、判定部２３は、オイル等の液体の粘度が、下側の第１しきい値以上であり、かつ、上側の（すなわち第１しきい値よりも大きい）第２しきい値以下である場合（正常範囲内にある場合）に、オイル等の液体の粘度が正常である（オイルが劣化していない）と判定する。一方、判定部２３は、オイル等の液体の粘度が、下側の第１しきい値未満のとき、又は、上側の第２しきい値よりも大きいときには、オイル等の液体の粘度が異常である（オイルが劣化している）と判定する。また、判定部２３は、上記周期毎に、オイル等の液体の粘度が異常であるか否か（オイルが劣化しているか否か）を判定する。 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). On the other hand, when the viscosity of the liquid such as oil is less than the first threshold value on the lower side or higher than the second threshold value on the upper side, 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.
　また、判定部２３は、上述した粘度と同様にして、オイル等の液体の誘電率と、判定しきい値とを比較して、オイル等の液体の誘電率が異常であるか否か（オイル等の液体の誘電率が正常範囲内にあるか否か）、すなわち、オイルが劣化しているか否かを判定する。
なお、オイルが劣化しているか否かの判定は、粘度のみに基づいて行ってもよいし、粘度と誘電率とを組み合わせて行ってもよい。 Further, 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.
　その際に、判定部２３は、オイル等の液体の温度に基づいて、上記判定しきい値（第１しきい値および第２しきい値）を補正し、オイル等の液体の粘度・誘電率と、補正後の判定しきい値とを比較して、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）を判定する。なお、判定結果は、記憶部２２に記憶されるとともに、出力部２４に出力される。 At that time, 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.
　出力部２４は、例えばＣＡＮ等の通信回線５０を介して、電子制御装置３０と相互に通信可能に接続されている。出力部２４は、オイル等の液体の粘度・誘電率の検出結果、及び、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）の判定結果等を、電子制御装置３０に対して出力する（送信する）。 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.
　より具体的には、出力部２４は、オイル等の液体の粘度・誘電率が異常である（オイルが劣化している）と判定されたときに、その旨を示すフラグ等の情報（警告情報）を出力（送信）する。また、出力部２４は、オイル等の液体の粘度・誘電率の検出結果、及び、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）の判定結果の出力を要求する出力要求が受け付けられたときに、記憶部２２に格納（記憶）されている検出結果、及び、判定結果を出力（送信）する。なお、出力部２４は、上記周期毎に、オイル等の液体の粘度・誘電率の検出結果、及び、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）の判定結果を出力（送信）してもよい。 More specifically, 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). In addition, 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).
　次に、図３を参照しつつ、スマートセンサ１の動作について説明する。図３は、スマートセンサ１による粘度・誘電率異常（オイル劣化）判定処理の処理手順を示すフローチャートである。 Next, the operation of the smart sensor 1 will be described with reference to FIG. FIG. 3 is a flowchart showing a processing procedure of viscosity / dielectric constant abnormality (oil deterioration) determination processing by the smart sensor 1.
　まず、電子制御装置３０から、オイル等の液体の粘度・誘電率が異常であるか否かを判定するためのそれぞれの判定しきい値、及び、オイル等の液体の粘度・誘電率を検出するそれぞれの周期（検出周期）が送信される（ステップＳ１００）。 First, from the electronic control device 30, 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).
　送信された上記判定しきい値、及び、周期（検出周期）は、スマートセンサ１により受信され、記憶部２２に格納（記憶）される（ステップＳ１０２）。 The transmitted determination threshold value and cycle (detection cycle) are received by the smart sensor 1 and stored (stored) in the storage unit 22 (step S102).
　次に、スマートセンサ１では、受信された周期（検出）に従い、オイル等の液体の粘度・誘電率が検出され、検出値が記憶（格納）される（ステップＳ１０４）。 Next, in the smart sensor 1, 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).
　続いて、検出されたオイル等の液体の粘度・誘電率と、判定しきい値とが比較され、オイル等の液体の粘度・誘電率が異常であるか否か（オイルが劣化しているか否か）についての判断が行われる（ステップＳ１０６）。ここで、オイル等の液体の粘度・誘電率が正常な場合（オイルが劣化していない場合）には、ステップＳ１１４に処理が移行する。一方、オイル等の液体の粘度・誘電率が異常であるとき（オイルが劣化しているとき）には、オイル等の液体の粘度・誘電率が異常であること（オイルが劣化していること）を示す情報（例えばフラグ）が、記憶部２２に記憶（格納）されるとともに、電子制御装置３０に出力（送信）される（ステップＳ１０８）。 Subsequently, 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). Here, when the viscosity and dielectric constant of the liquid such as oil are normal (when the oil has not deteriorated), the process proceeds to step S114. On the other hand, when 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). ) Is stored (stored) in the storage unit 22 and output (transmitted) to the electronic control device 30 (step S108).
　オイル等の液体の粘度・誘電率が異常であること（オイルが劣化していること）を示す情報（例えばフラグ）を受信（ステップＳ１１０）した電子制御装置３０は、オイル等の液体の粘度・誘電率が異常であること（オイルが劣化していること）をユーザに提示（警告）する（ステップＳ１１２）。 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).
　一方、スマートセンサ１では、その後、次の検出タイミング（周期）が来たか否かについての判断が行われる（ステップＳ１１４）。そして、まだ次の検出タイミング（周期）が来ていない場合には、次の検出タイミング（周期）が来るまで、本ステップが繰り返して実行される。一方、次の検出タイミング（周期）が来たときには、ステップＳ１０４に処理が移行し、上述したステップＳ１０４～Ｓ１０８の処理が繰り返して実行される。 On the other hand, in the smart sensor 1, 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.
　以上、詳細に説明したように、本実施形態によれば、オイル等の液体の粘度・誘電率が検出されるとともに、検出されたオイル等の液体の粘度・誘電率が異常であるか否かを判定するための判定しきい値の入力が受け付けられ、オイル等の液体の粘度・誘電率と判定しきい値とが比較されて、オイル等の液体の粘度・誘電率が異常であるか否かが判定される。そして、オイル等の液体の粘度・誘電率の検出結果、及び、オイル等の液体の粘度・誘電率が異常であるか否かの判定結果が出力される。すなわち、判定しきい値を入力すると、自動的にオイル等の液体の粘度・誘電率が検出されるとともに、オイル等の液体の粘度・誘電率の異常の有無が判定され、その結果（検出結果・判定結果）が出力される。 As described in detail above, according to the present embodiment, whether or not 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. That is, when the judgment threshold value is input, the viscosity / permittivity of the liquid such as oil is automatically detected, and the presence / absence of an abnormality in the viscosity / permittivity of the liquid such as oil is determined, and the result (detection result).・ Judgment result) is output.
　よって、本実施形態によれば、判定しきい値を任意に設定／変更できるため、ユーザ毎に適した判定しきい値を設定／変更でき、汎用性及び利便性を向上することができる。また、自動的にオイル等の液体の粘度・誘電率の異常を判定してくれるため、ユーザのアプリケーション（ソフトウェア）側で異常を判定する必要がなく（すなわち、アプリケーション（ソフトウェア）を作成する必要がなく）、スマートセンサ１を利用するアプリケーション（ソフトウェア）の作成工数を低減することができる。さらに、自動的に異常を判定して、その結果を知らせてくれるため、スマートセンサ１を利用するアプリケーション（ソフトウェア）の処理負荷を低減することができる。その結果、スマートセンサ１を利用するアプリケーション（ソフトウェア）の作成工数や処理負荷を低減でき、かつ、スマートセンサ１の汎用性および利便性を向上することが可能となる。 Therefore, according to the present embodiment, since 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. In addition, 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). However, it is possible to reduce the number of steps for creating an application (software) that uses the smart sensor 1. Further, since the abnormality is automatically determined and the result is notified, 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.
　本実施形態によれば、オイル等の液体の粘度・誘電率を検出する周期の入力が受け付けられ、受け付けられた周期毎に、オイル等の液体の粘度・誘電率が検出され、受け付けられた周期毎に、オイル等の液体の粘度・誘電率が異常であるか否かが判定される。そのため、粘度・誘電率等を検出する周期、及び、粘度・誘電率が異常であるか否かを判定する周期を任意に設定／変更することができる。また、ユーザは、周期的にオイル等の液体の粘度・誘電率等を検出するアプリケーション（ソフトウェア）を作成して組み込む必要がなくなる。さらに、スマートセンサ１を利用するアプリケーション（ソフトウェア）の処理負荷を低減できる。その結果、スマートセンサ１の汎用性および利便性をより向上することが可能となる。 According to the present embodiment, 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. Each time, it is determined whether or not the viscosity / dielectric constant of a liquid such as oil is abnormal. Therefore, 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. Further, 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. Further, 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.
　本実施形態によれば、オイル等の液体の温度に基づいて、判定しきい値が補正され、オイル等の液体の粘度・誘電率と、補正後の判定しきい値とが比較されて、オイル等の液体の粘度・誘電率が異常であるか否かが判定される。そのため、オイル等の液体の粘度・誘電率の異常（劣化）をより正確に判定することができる。 According to the present embodiment, 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.
　本実施形態によれば、オイル等の液体の粘度・誘電率が異常であると判定された場合に、オイル等の液体の粘度・誘電率が異常であること（オイルが劣化していること）を示す情報が出力される。そのため、オイル等の液体の粘度・誘電率が異常であること（オイルが劣化していること）を電子制御装置３０側に迅速に認識させることができる。 According to this embodiment, when it is determined that the viscosity / dielectric constant of a liquid such as oil is abnormal, the viscosity / dielectric constant of the liquid such as oil is abnormal (the oil is deteriorated). Information indicating that is output. Therefore, 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).
　本実施形態によれば、オイル等の液体の粘度・誘電率の検出結果、及び、判定結果が記憶され、オイル等の液体の粘度・誘電率の検出結果、及び、判定結果の出力を要求する出力要求が受け付けられたときに、記憶されている検出結果、及び、判定結果が出力される。そのため、電子制御装置３０では、必要なタイミングで上記各種情報を受け取ることができる。 According to the present embodiment, 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. When 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.
　以上、本発明の実施の形態について説明したが、本発明は、上記実施形態に限定されるものではなく種々の変形が可能である。例えば、上記実施形態では、粘度センサ（粘度検出部１１）として、超音波式やＳＡＷ式のセンサを採用したが、粘度センサは、超音波式やＳＡＷ式に限られることなく、他の形式のセンサを用いることもできる。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways. For example, in the above embodiment, 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.
　また、上記実施形態では、通信回線５０としてＣＡＮを用いた場合を例にして説明したが、例えば、記憶部２２のステータス格納領域２２ｄにインターフェース設定レジスタを設け、該インターフェース設定レジスタに予め決められた値（例えば、００、０１、１０、１１等）を書き込むことで、所望のインターフェースを選択することができる構成としてもよい。より具体的には、例えば、ＣＡＮ通信、ＵＡＲＴ（Ｕｎｉｖｅｒｓａｌ　Ａｓｙｎｃｈｒｏｎｏｕｓ　Ｒｅｃｅｉｖｅｒ　Ｔｒａｎｓｍｉｔｔｅｒ）通信、ＳＣＩ（Ｓｅｒｉａｌ　Ｃｏｍｍｕｎｉｃａｔｉｏｎ　Ｉｎｔｅｒｆａｃｅ）通信、ＳＰＩ（Ｓｅｒｉａｌ　Ｐｅｒｉｐｈｅｒａｌ　Ｉｎｔｅｒｆａｃｅ）通信等の各種インターフェースを選択可能（切替え可能）な構成としてもよい。この場合、ユーザは、スマートセンサ１を購入した後に、例えば、量産ライン等において、デフォルトのインターフェースを用いて、インターフェース設定レジスタに所望のインターフェースに対応した値を書き込む。その後、例えば、建設機械等にスマートセンサ１を搭載する。搭載後は、電子制御装置３０（ホスト側）のインターフェースに従い通信する。このようにすれば、ユーザは、スマートセンサ１のインターフェースを選択できるため、電子制御装置３０のＬＳＩの選択が容易となり（ＣＡＮ通信に対応していないＬＳＩを用いることも可能になり）、設計自由度が向上する。 Further, in the above embodiment, the case where CAN is used as the communication line 50 has been described as an example. For example, an interface setting register is provided in the status storage area 22d of the storage unit 22, and the interface setting register is predetermined. By writing a value (for example, 00, 01, 10, 11, etc.), a desired interface may be selected. More specifically, for example, various interfaces such as CAN communication, UART (Universal Synchronous Receiver Transmitter) communication, SCI (Serial Communication Interface) communication, and SPI (Serial Communication Interface) communication that can be switched (switchable) can be selected. good. In this case, 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.
　１　スマートセンサ
　１１　粘度検出部
　１２　温度検出部
　１３　誘電率検出部
　２０　情報処理部
　２１　入力部
　２２　記憶部
　２２ａ　検出値格納領域
　２２ｂ　判定しきい値格納領域
　２２ｃ　周期格納領域
　２２ｄ　ステータス格納領域
　２３　判定部
　２４　出力部
　２５　電源部
　３０　電子制御装置
　５０　通信回線 1 Smart sensor 11 Viscosity detection unit 12 Temperature detection unit 13 Dielectric constant detection unit 20 Information processing unit 21 Input unit 22 Storage unit 22a Detection value storage area 22b Judgment threshold storage area 22c Periodic storage area 22d Status storage area 23 Judgment unit 24 Output unit 25 Power supply unit 30 Electronic control device 50 Communication line

Claims (7)

  1. 　液体の粘度を検出する粘度検出部と、
    　前記粘度検出部により検出された液体の粘度が異常であるか否かを判定するための判定しきい値の入力を受け付ける入力部と、
    　前記液体の粘度と、前記判定しきい値とを比較して、前記液体の粘度が異常であるか否かを判定する判定部と、
    　前記液体の粘度の検出結果、及び／又は、前記液体の粘度が異常であるか否かの判定結果を出力する出力部と、を備えることを特徴とするスマートセンサ。     A viscosity detector that detects the viscosity of a liquid,
    An input unit that accepts an input of a determination threshold value for determining whether or not the viscosity of the liquid detected by the viscosity detection unit is abnormal, and an input unit.
    A determination unit that compares the viscosity of the liquid with the determination threshold value to determine whether or not the viscosity of the liquid is abnormal.
    A smart sensor comprising: an output unit for outputting a detection result of the viscosity of the liquid and / or a determination result of whether or not the viscosity of the liquid is abnormal.
  2. 　前記出力部は、前記液体の粘度が異常であると判定された場合に、前記液体の粘度が異常であることを示す情報を出力することを特徴とする請求項１に記載のスマートセンサ。 The smart sensor according to claim 1, wherein the output unit outputs information indicating that the viscosity of the liquid is abnormal when it is determined that the viscosity of the liquid is abnormal.
  3. 　前記入力部は、前記液体の粘度を検出する周期の入力を受け付け、
    　前記検出部は、受け付けられた周期毎に、前記液体の粘度を検出し、
    　前記判定部は、受け付けられた周期毎に、前記液体の粘度が異常であるか否かを判定することを特徴とする請求項１又は２に記載のスマートセンサ。     The input unit receives an input of a cycle for detecting the viscosity of the liquid, and receives an input.
    The detection unit detects the viscosity of the liquid at each received cycle and detects the viscosity of the liquid.
    The smart sensor according to claim 1 or 2, wherein the determination unit determines whether or not the viscosity of the liquid is abnormal for each accepted cycle.
  4. 　前記液体の温度を検出する温度検出部を備え、
    　前記判定部は、前記温度検出部により検出された液体の温度に基づいて、前記判定しきい値を補正し、前記液体の粘度と、補正後の判定しきい値とを比較して、前記液体の粘度が異常であるか否かを判定することを特徴とする請求項１～３のいずれか１項に記載のスマートセンサ。     A temperature detector for detecting the temperature of the liquid is provided.
    The determination unit corrects the determination threshold value based on the temperature of the liquid detected by the temperature detection unit, compares the viscosity of the liquid with the corrected determination threshold value, and compares the liquid with the corrected determination threshold value. The smart sensor according to any one of claims 1 to 3, wherein it is determined whether or not the viscosity of the smart sensor is abnormal.
  5. 　前記液体の粘度の検出結果、及び／又は、前記判定結果を記憶する記憶部を備え、
    　前記入力部は、前記液体の粘度の検出結果、及び／又は、前記判定結果の出力を要求する出力要求の入力を受け付け、
    　前記出力部は、前記出力要求が受け付けられたときに、前記記憶部に記憶されている前記検出結果、及び／又は、前記判定結果を出力することを特徴とする請求項１～４のいずれか１項に記載のスマートセンサ。     A storage unit for storing the detection result of the viscosity of the liquid and / or the determination result is provided.
    The input unit receives the input of the detection result of the viscosity of the liquid and / or the input of the output request requesting the output of the determination result.
    One of claims 1 to 4, wherein the output unit outputs the detection result and / or the determination result stored in the storage unit when the output request is received. The smart sensor according to item 1.
  6. 　前記液体はオイルであり、
    　前記粘度検出部は、オイルの粘度を検出し、
    　前記入力部は、前記オイルが劣化しているか否かを判定するための判定しきい値の入力を受け付け、
    　前記判定部は、前記オイルの粘度と、前記判定しきい値とを比較して、前記オイルが劣化しているか否かを判定し、
    　前記出力部は、前記オイルが劣化していると判定された場合に、前記オイルが劣化していることを示す情報を出力することを特徴とする請求項１～５のいずれか１項に記載のスマートセンサ。     The liquid is oil
    The viscosity detector detects the viscosity of the oil and
    The input unit receives an input of a determination threshold value for determining whether or not the oil has deteriorated.
    The determination unit compares the viscosity of the oil with the determination threshold value to determine whether or not the oil has deteriorated.
    The invention according to any one of claims 1 to 5, wherein the output unit outputs information indicating that the oil has deteriorated when it is determined that the oil has deteriorated. Smart sensor.
  7. 　液体の誘電率を検出する誘電率検出部をさらに備え、
    　前記入力部は、前記誘電率検出部により検出された液体の誘電率が異常であるか否かを判定するための判定しきい値の入力を受け付け、
    　前記判定部は、前記液体の誘電率と、前記判定しきい値とを比較して、前記液体の誘電率が異常であるか否かを判定し、
    　前記出力部は、前記液体の誘電率の検出結果、及び／又は、前記液体の誘電率が異常であるか否かの判定結果を出力することを特徴とする請求項１に記載のスマートセンサ。     Further equipped with a dielectric constant detector for detecting the dielectric constant of a liquid,
    The input unit receives an input of a determination threshold value for determining whether or not the dielectric constant of the liquid detected by the dielectric constant detection unit is abnormal.
    The determination unit compares the dielectric constant of the liquid with the determination threshold value to determine whether or not the dielectric constant of the liquid is abnormal.
    The smart sensor according to claim 1, wherein the output unit outputs a detection result of the dielectric constant of the liquid and / or a determination result of whether or not the dielectric constant of the liquid is abnormal.
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