WO2021059547A1 - Compresseur d'air - Google Patents

Compresseur d'air Download PDF

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Publication number
WO2021059547A1
WO2021059547A1 PCT/JP2020/004463 JP2020004463W WO2021059547A1 WO 2021059547 A1 WO2021059547 A1 WO 2021059547A1 JP 2020004463 W JP2020004463 W JP 2020004463W WO 2021059547 A1 WO2021059547 A1 WO 2021059547A1
Authority
WO
WIPO (PCT)
Prior art keywords
air compressor
unit
communication
control device
external terminal
Prior art date
Application number
PCT/JP2020/004463
Other languages
English (en)
Japanese (ja)
Inventor
祐 長谷川
之家 任
憲 梅田
Original Assignee
株式会社日立産機システム
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立産機システム filed Critical 株式会社日立産機システム
Publication of WO2021059547A1 publication Critical patent/WO2021059547A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/44—Program or device authentication

Definitions

  • the present invention relates to an air compressor.
  • Air compressors are widely used for the purpose of providing compressed fluid to consumers regardless of whether they are inside or outside a building, such as inside a factory or at a construction site. Air compressors are used not only to transport air through pipes, but also as a driving force for pneumatically operated tools and brakes.
  • the start and stop of the tool can often be operated by the valve of the tool itself, but the stop of the air supply and the control of the air pressure are operated by the switch of the compressor body. There is a need to. Therefore, when checking the state of the air compressor or changing the air pressure, the operator needs to move from the place where the tool is used to the place where the main body is located and operate it. In order to improve work efficiency and simple convenience, it is necessary to have a function to remotely monitor and operate the air compressor.
  • Patent Document 1 is known regarding an air compressor that remotely monitors and operates an air compressor.
  • Patent Document 1 describes "a motor driven by supplying electric power from a commercial power source, a compressed air generating unit that generates compressed air by driving the motor, and a tank that stores compressed air generated by the compressed air generating unit.
  • a control board that controls the drive of the motor and a communication unit on the main body side that transmits the main body information to the external terminal, the state of the air compressor can be checked without moving to the place where the air compressor is installed.
  • Patent Document 1 describes an air compressor capable of exchanging data with an external terminal by wireless communication, but no consideration is given to the confidentiality of the communication content. Therefore, there is a possibility that the air compressor and the owner may be damaged by intercepting the communication contents by a third party or operating the air compressor without permission.
  • an object of the present invention is to provide an air compressor that realizes remote monitoring and remote control based on secure communication.
  • a mechanical unit that compresses and stores air
  • an electric unit that gives power to the mechanical unit
  • a control device that controls electric power supplied to the electric unit.
  • the control device is an air compressor that generates a password used for authentication when performing authentication with an external terminal and controls the display unit to display the password.
  • remote monitoring and remote control can be realized based on secure communication.
  • FIG. It is a block diagram of the air compressor in Example 1.
  • FIG. It is a figure which showed the protocol of the data processing in Example 1.
  • FIG. It is a block diagram of the air compressor in Example 2.
  • FIG. 1 is a block diagram of the air compressor according to the first embodiment.
  • FIG. 2 is a diagram showing a data processing protocol between the control unit, the communication unit, and the external terminal in the first embodiment.
  • This embodiment is an example in which an air compressor having a communication function is configured.
  • the air compressor 100 is supplied to a mechanism unit 107 composed of a tank and a compression mechanism for accumulating air inside, an electric unit 105 composed of a motor and a cooling fan for driving the compression mechanism, and an electric unit 105. It is composed of a control device 110 that controls electric power by electronic means.
  • the control device 110 includes ICs (for example, microcomputers, FPGAs, etc.), electronic components (for example, resistors, capacitors, oscillation circuits, etc.), power elements (for example, transistors, relays, etc.) for controlling the electric unit 105 and the display unit 101. ) Is an electronic circuit board mounted on a printed circuit board by means such as soldering.
  • ICs for example, microcomputers, FPGAs, etc.
  • electronic components for example, resistors, capacitors, oscillation circuits, etc.
  • power elements for example, transistors, relays, etc.
  • the control device 110 includes a circuit component used for controlling the electric unit 105, a control unit 103 composed of a microcomputer or a software function in the IC, a circuit component including an antenna for transmitting radio waves to the outside, and a microcomputer or a microcomputer in the IC. It is composed of a communication unit 109 composed of software functions and a display unit 101 which is a circuit component.
  • the display unit 101 is a display component (LED, liquid crystal, etc.) capable of expressing numerical values and the like, and is used for displaying the air pressure and temperature of the mechanical unit 107 of the air compressor 100.
  • the control unit 103 that controls the electric unit 105 and the communication unit 109 that has a communication function have different ICs and are provided as software functions thereof.
  • the control unit 103 and the communication unit 109 are connected by electrical wiring and signal wiring as shown in FIG. 1, and signals can be exchanged with each other.
  • the communication unit 109 transmits radio waves in the industrial science and medical band (for example, radio waves in the 2.4 GHz band) by supplying power to the antenna, and external terminal 201 (for example, a mobile terminal or stationary arithmetic unit) equipped with a radio wave receiving device. It is possible to communicate with a device, etc.) via a wireless line.
  • radio waves in the industrial science and medical band for example, radio waves in the 2.4 GHz band
  • external terminal 201 for example, a mobile terminal or stationary arithmetic unit
  • the air compressor 100 and the external terminal 201 can transmit and receive electronic data to each other or in one direction by using an arbitrary communication method (for example, wireless LAN or the like). That is, the communication unit 109 can be used for both transmission and reception of radio waves.
  • the communication unit 109 is an integrated circuit (for example, System On a Chip or the like) containing electronic components such as a CPU and a memory inside.
  • the air compressor 100 operates by supplying power from the outside, and stops when the power supply from the outside is cut off.
  • the supplied power supply energizes the control device 110, and is supplied to the electric unit 105 according to an operation command from the control device 110.
  • the IC programs mounted on the control unit 103 and the communication unit 109 are recorded in their respective non-volatile memories and read when the power is turned on.
  • the control device 110 does not operate when the power is cut off, but data such as settings changed during operation and a part of electronic data written out via wireless communication are held in the non-volatile memory before stopping, and the next time. It can be read at startup.
  • this embodiment uses Bluetooth Low Energy (hereinafter referred to as BLE), which is a type of communication standard of Bluetooth (registered trademark), which is one of the proximity communication standards.
  • BLE has a mechanism (hereinafter referred to as pairing) for securely starting encrypted communication at the start of connection.
  • BLE has a mechanism (hereinafter referred to as pairing) for securely starting encrypted communication at the start of connection.
  • pairing There are multiple versions of BLE due to changes in specifications.
  • version 4.1 or later for example, version 4.2, etc. is targeted.
  • the communication unit 109 supplies electric power to the antenna and transmits a radio wave that transmits its own individual signal and service content as data to the outside. This is called advertising.
  • the external terminal 201 has an antenna suitable for receiving radio waves transmitted by the communication unit 109 and software capable of interpreting the contents of the radio waves, and the received signal of the communication unit 109 is BLE standardized. Send a similar connection request wirelessly.
  • the communication unit 109 When the communication unit 109 receives the connection request from the external terminal 201, the communication unit 109 transmits the setting of the security condition to be used at the time of connection. Security condition settings are notified to each other.
  • the security condition of the BLE standard is that the mode is divided according to the presence or absence of the data signature, but here, the method without using the data signature is adopted.
  • the level of security is in ascending order, and the specifications specify three types: no encryption, encryption without authentication, and encryption using authentication.
  • it is a method of performing encryption using authentication.
  • a passkey display method As an authentication method, either a passkey display method or a numerical comparison method is provided.
  • the passkey display method a personal identification number is generated on one side of the device that starts the connection, and the personal identification number is displayed on the display unit. Then, the operator inputs the PIN code displayed on the display unit to the other device, and the PIN code generated by one device and the PIN code input to the other device are collated by one device. This is a method to authenticate the connection.
  • the numerical comparison method random numbers calculated by a specific function are generated on both devices that start the connection, and the password generated based on the random numbers exchanged with each other is displayed on each device, and the numbers match each other.
  • This is a method of allowing the device that requested the connection to authenticate the connection.
  • the connection authentication may be permitted if, for example, the operator performs an approval operation on the device requesting the connection when the displayed numbers match.
  • the passkey display method will be mainly described, but any method can be applied.
  • the communication unit 109 immediately disconnects the connection.
  • the communication unit 109 When the security condition of the communication unit 109 and the security condition of the external terminal 201 are conditions for performing encryption using authentication, the communication unit 109 generates a password and requests the external terminal 201 to input the password. Send.
  • the communication unit 109 executes data processing for converting the generated password into receivable data (for example, Modbus format) of the control unit 103, and transmits the password data to the control unit 103 by wire.
  • receivable data for example, Modbus format
  • the control unit 103 returns to the communication unit 109 that the password data has been completely received.
  • the control unit 103 executes an expression process that converts the received password data into a data format that can be expressed by the display unit 101 (for example, a pattern of a 7-segment display) and displays it on the display unit 101.
  • the number of digits that can be displayed on the display unit 101 is sufficient, all the passwords are displayed as they are.
  • the numerical values are repeatedly displayed in order by a method in which the order of the number of displayed digits can be determined.
  • the personal identification number is 6 digits and the number of expressible digits of the display unit 101 is 4, the upper 4 digits are displayed first, and then the lower 2 digits are displayed. It may be displayed sequentially.
  • a method may be used in which a sign (for example, an alphabet, a mark, etc.) capable of determining the order of the number of digits is simultaneously displayed on the display unit 101, and the password is repeatedly displayed in order.
  • the operator of the external terminal 201 visually confirms the personal identification number displayed on the display unit 101, inputs the personal identification number to the external terminal 201, and transmits the personal identification number from the external terminal 201 to the communication unit 109.
  • the communication unit 109 compares the received password with the generated password. If the passwords match, the communication unit 109 sends a temporary encryption key used for encrypting the communication content after connection to the external terminal 201. If the passwords are different, the communication unit 109 immediately disconnects the connection.
  • the authentication procedure between the external terminal 201 and the communication unit 109 shown in FIG. 2 is called pairing.
  • the communication unit 109 can be paired with a plurality of external terminals 201 within a range allowed by the design specifications of the communication unit 109.
  • the paired external terminals 201 and the communication unit 109 can be connected at the same time, and communicate with each external terminal in order. However, if the design specification of the communication unit 109 is designed to allow only connection with a single external terminal 201, it will not be connected to the second and subsequent external terminals 201.
  • a display unit for collating numerical values is required, but the IC, which is an electronic component with a communication function using BLE, did not have a display unit by itself.
  • pairing without numerical verification is possible, but in industrial machines such as air compressors, there is a possibility that a third party may operate the device without permission, which poses a safety problem.
  • External terminals such as smartphones that perform pairing have input / output functions such as keyboards and monitors, but if only one of the pairing devices has an input / output device, a secure connection is guaranteed. Not done. Therefore, numerical collation requires a display unit that can be applied to a communication function using BLE, but it is costly and maintenance to provide an air compressor with a dedicated display unit that can be applied to a communication function using BLE. Difficult to hire from a sexual point of view. In this embodiment, such a problem in the communication function using BLE can be solved.
  • the password used for BLE authentication is air-compressed by using the display unit originally provided in the air compressor without adding a new display unit. It is possible to display it on the machine.
  • the communication unit that generates the password and the control unit that controls the display unit are connected by highly confidential wired communication inside the device, the external terminal and the control unit are virtually wirelessly connected by secure means. It is possible to realize a communication function that maintains high security.
  • FIG. 3 is a block diagram of the air compressor of the second embodiment.
  • the structure of the air compressor of the second embodiment is the same as that of the first embodiment except that the configuration is particularly mentioned.
  • the configuration is substantially the same as that of the air compressor shown in the first embodiment, but the air compressor 200 electronically supplies electric power to be supplied to the mechanical unit 107, the electric unit 105, and the electric unit 105. It is composed of a control device 120 controlled by means.
  • the control device 120 has substantially the same configuration as the control device 110 shown in the first embodiment, but the display unit 203 is not included in the configuration.
  • the display unit 203 is provided in a form that can be attached to and detached from the air compressor 200 or the control device 120.
  • the display unit 203 is connected to the air compressor 200 by wire communication via an electric wire (for example, a coaxial cable, a twisted pair cable, etc.). Then, the display unit 203 has an electrical connection with the control device 120 and receives electric power. When the display unit 203 is connected to the air compressor 200, the display unit 203 can transmit and receive data by wire communication with the control unit 103.
  • an electric wire for example, a coaxial cable, a twisted pair cable, etc.
  • control unit 103 can transmit data such as arbitrary characters and numbers to the display unit 203, and the display unit 203 can display characters and numbers based on the received data.
  • the display unit 203 can be driven by the built-in battery even when it is removed from the air compressor 200, and the data received while connected to the control device 120 can be stored in the internal storage and moved to another location. Is.
  • the effect described in the first embodiment can be obtained, and at the same time, the position of the display unit can be arranged at a place away from the compressor main body, which is high when confirming the password. Visibility can be expected. Further, when there are a plurality of air compressors, pairing of all the air compressors with the external terminal can be completed with one display unit, and the display unit can be diverted.
  • FIG. 4 is a block diagram of the air compressor of the third embodiment.
  • the configuration of the air compressor of Example 3 is the same as that of Examples 1 and 2 except for particular mention.
  • the configuration is substantially the same as that of the air compressors shown in Examples 1 and 2, but the air compressor 300 has a display terminal 303 which is a detachable part.
  • the display terminal 303 is a terminal (for example, a tablet-type personal computer or the like) having an independent control function, an independent battery, a wired communication function, and a wireless communication function.
  • the display terminal 303 can communicate with the control device 120 when it is connected to the air compressor 300 by wire, and can communicate with the communication unit 109 when it is wirelessly connected to the air compressor 300. ..
  • the display terminal 303 has a function of displaying internal data (for example, air pressure, etc.) of the control unit 103 when connected to the air compressor 300 in either a wired or wireless state. Further, the display terminal 303 can display a personal identification number or the like when the external terminal 301 and the communication unit 109 make a wireless connection by BLE by means such as pairing.
  • internal data for example, air pressure, etc.
  • the communication unit 109 pairs the generated password with the external terminal 301 by the method described in the first embodiment. Make a ring.
  • the communication unit 109 transmits the generated password to the display terminal 303 and pairs it with the external terminal 301 by displaying it on the display terminal 303.
  • the effects described in the first and second embodiments can be obtained, and at the same time, the display terminal 303 can be used like the external terminal 301.
  • the display terminal 303 and the communication unit 109 are wirelessly connected at the time of shipment of the air compressor, the user of the air compressor does not have to perform pairing or the like by himself, and the individual specifications of the external terminal 301 are specified. It is possible to provide a service that avoids the problems that may occur due to.
  • the processing of the communication unit 109 and the control unit 103 in the control device in the above-described embodiment is an example.
  • the communication unit 109 may execute a part of the function of the control unit 103 described above instead, or the control unit 103 may execute a part of the function of the communication unit 109 instead.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Selective Calling Equipment (AREA)

Abstract

Un compresseur d'air selon la présente invention comprend : une unité mécanique qui réalise une compression et une accumulation d'air ; une unité électromotrice qui fournit une puissance motrice à l'unité mécanique ; et un dispositif de commande qui commande l'énergie électrique pour alimenter l'unité électromotrice. Lorsqu'une authentification doit être réalisée par rapport à un terminal externe, le dispositif de commande génère un mot de passe numérique à utiliser pour l'authentification, et réalise une commande afin que le mot de passe numérique soit affiché sur une unité d'affichage.
PCT/JP2020/004463 2019-09-24 2020-02-06 Compresseur d'air WO2021059547A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019173206A JP7442286B2 (ja) 2019-09-24 2019-09-24 空気圧縮機
JP2019-173206 2019-09-24

Publications (1)

Publication Number Publication Date
WO2021059547A1 true WO2021059547A1 (fr) 2021-04-01

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PCT/JP2020/004463 WO2021059547A1 (fr) 2019-09-24 2020-02-06 Compresseur d'air

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WO (1) WO2021059547A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023100281A (ja) * 2022-01-06 2023-07-19 株式会社日立産機システム 機器の監視システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005165601A (ja) * 2003-12-02 2005-06-23 Canon Inc 印刷装置および印刷装置に無線接続するための認証方法
WO2015118900A1 (fr) * 2014-02-04 2015-08-13 日立工機株式会社 Système de notification de défaillance, outil électrique, et terminal de communication
JP2015169072A (ja) * 2014-03-04 2015-09-28 日立工機株式会社 空気圧縮機
JP2019012945A (ja) * 2017-06-30 2019-01-24 キヤノン株式会社 通信方法、通信装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002021851A (ja) 2000-07-04 2002-01-23 Koyo Seiko Co Ltd 磁気軸受制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005165601A (ja) * 2003-12-02 2005-06-23 Canon Inc 印刷装置および印刷装置に無線接続するための認証方法
WO2015118900A1 (fr) * 2014-02-04 2015-08-13 日立工機株式会社 Système de notification de défaillance, outil électrique, et terminal de communication
JP2015169072A (ja) * 2014-03-04 2015-09-28 日立工機株式会社 空気圧縮機
JP2019012945A (ja) * 2017-06-30 2019-01-24 キヤノン株式会社 通信方法、通信装置

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JP7442286B2 (ja) 2024-03-04
JP2021050639A (ja) 2021-04-01

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