WO2020262545A1 - Dispositif de détection - Google Patents

Dispositif de détection Download PDF

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Publication number
WO2020262545A1
WO2020262545A1 PCT/JP2020/025064 JP2020025064W WO2020262545A1 WO 2020262545 A1 WO2020262545 A1 WO 2020262545A1 JP 2020025064 W JP2020025064 W JP 2020025064W WO 2020262545 A1 WO2020262545 A1 WO 2020262545A1
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WO
WIPO (PCT)
Prior art keywords
explosion
detection device
proof
circuit
sensor
Prior art date
Application number
PCT/JP2020/025064
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English (en)
Japanese (ja)
Inventor
優 立海
Original Assignee
日本精機株式会社
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 日本精機株式会社 filed Critical 日本精機株式会社
Publication of WO2020262545A1 publication Critical patent/WO2020262545A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to a detection device.
  • Patent Document 1 There is a technique disclosed in Patent Document 1 regarding a detection device used in a dangerous place.
  • a dangerous place is a place in a factory or plant where explosive gas may mix with air to create a dangerous atmosphere above the lower explosive limit.
  • Detection devices that are expected to be used in hazardous areas must comply with intrinsically safe explosion-proof requirements (JIS C60028).
  • the present invention has an object of providing a detection device that satisfies the intrinsically safe explosion-proof requirement even when sensors come into contact with each other.
  • the detection device of the present invention The first explosion-proof area to which the battery module belongs, It has a transformer circuit, a control circuit, and a second explosion-proof area to which multiple sensors belong.
  • the first explosion-proof area and the second explosion-proof area are divided by a first safety-holding component composed of a first resistor.
  • the present invention it is possible to provide a detection device that satisfies the intrinsically safe explosion-proof requirement even when the sensors come into contact with each other.
  • FIG. 1 shows a state collection system 1 in a petrochemical plant.
  • Petrochemical plants are very large. Therefore, the state of each device is detected by the detection device 10, and the detected information is managed by the data storage device 5.
  • a plurality of detection devices 10 are arranged in the dangerous place DA by being attached to each device in the plant.
  • the detected values detected by these detection devices 10 are transmitted to the network construction device 4 directly or via the repeater 3 and transmitted to the data storage device 5.
  • the plant manager can check the information stored in the data storage device 5 by using a notebook computer (management terminal) (not shown). Further, the operator holds the mobile terminal (communication device) 6 such as a tablet terminal over the detection device 10 to perform communication, thereby storing the information in the detection device 10 and / or reading the information from the detection device 10. be able to.
  • short-range radio such as RFID (Radio Frequency Identifier) standard defined by ISO / IEC 14443 and NFC (Near Field Communication) standard defined by ISO / IEC 18092. Communication can be adopted.
  • RFID Radio Frequency Identifier
  • NFC Near Field Communication
  • the number of detection devices 10 may be four or more, or one or two.
  • FIG. 2 shows a cross-sectional view of the detection device 10.
  • the detection device 10 was connected to a metal case 11, a window member 50 provided in an opening 43 formed in the case 11, a control board 14 fixed to the case 11, and the control board 14.
  • the control circuit 16 mounted on the control board 14, the sensor 70 connected to the control board 14 to detect the state of the device, the sensor connector 21 connecting the control board 14 to the sensor 70 via the cable 21a, and the control board 14 to supply power.
  • the main configuration is a connector 24 that connects the board 14 to the communication antenna 23, a connector 71 that connects the sensor 70 to the connector 25, and a connector 62 that connects the flexible printed circuit board 61 and the sub-board 60 via the cable 62a. Make it an element.
  • the detection device 10 includes a plurality of connectors 25, and the sensor 70 can be connected to each connector 25. Further, the detection device 10 may include one or more extension cables 72 between the sensor 70 and the connector 71.
  • the case 11 is composed of a first divided body 30 which is arranged at the lower part and has an opening at the upper side, and a second divided body 40 which is superposed on the first divided body 30.
  • the first divided body 30 and the second divided body 40 are fastened by bolts and nuts (not shown).
  • the surface of the case 11 is subjected to surface treatment such as painting as necessary.
  • the control board 14 is a multilayer printed circuit board made of glass epoxy.
  • the control board 14 is fixed to the back surface of the second divided body 40 by the screw 26 and is grounded.
  • the control board 14 includes a control circuit 16, a transformer circuit 17, and an amplifier circuit 18 (FIGS. 3 and 4).
  • the control board 14 may be provided with a light emitting element that can be switched on, blinking, and turned off by the control circuit 16.
  • the control circuit 16 is composed of, for example, a circuit, and the circuit is composed of at least one processor (for example, a central processing unit (CPU)) and at least one application specific integrated circuit (ASIC). And / or include at least one semiconductor integrated circuit such as at least one Field-Programmable Gate Array (FPGA) and capable of performing at least some or all of the functions of the detector 10 shown in FIG. Is.
  • the control circuit 16 may include a storage unit composed of a non-volatile memory (not shown). The control circuit 16 transmits the detection value and / or the voltage value input from the sensor 70 from the communication antenna 23 to the network construction device 4.
  • the transformer circuit 17 is, for example, a DC / DC converter, and adjusts the voltage supplied from the battery module 80 to a voltage suitable for the control circuit 16.
  • the amplifier circuit 18 is, for example, an operational amplifier, and adjusts the voltage input from the sensor 70 to a voltage suitable for the control circuit 16. When the detected value is input from the sensor 70 or when the voltage is sufficient, the sensor 70 may be connected to the control circuit 16 without going through the amplifier circuit 18.
  • the first divided body 30 is composed of a bottom portion 31 which is substantially rectangular in bottom view, and a lower side wall portion 32 which is raised from each edge of the bottom portion 31.
  • a part of the bottom portion 31 protrudes downward to form a connector storage portion 33 in which the connector 25 is stored.
  • the lower side wall portion 32 is grounded (grounded).
  • the second divided body 40 is composed of a lid portion 41 having a substantially rectangular shape in a plan view, and an upper side wall portion 42 lowered from each edge of the lid portion 41.
  • a substantially rectangular opening 43 is opened in the center of the lid 41.
  • the area of the opening 43 in a plan view is set to 1600 mm 2 or less.
  • An antenna mounting hole (not shown) for mounting the communication antenna 23 is provided adjacent to the opening 43.
  • the upper side wall portion 42 is continuous with the lower side wall portion 32.
  • the window member 50 is provided so as to close the opening 43 of the second divided body 40.
  • the material of the window member 50 is made of a resin that has electrical insulation and transmits radio waves or magnetism used for short-range wireless communication.
  • a multilayer printed circuit board is used as the sub-board 60.
  • the sub-board 60 is an electronic circuit 63. Is equipped with.
  • the sub-board 60 is connected to the control board 14 via a spacer 27 and BtoB (Board to Board) connectors 28 and 29.
  • the sub-board 60 is connected to the flexible printed circuit board 61 provided with an antenna via a cable 62a and a connector 62. Since the flexible printed circuit board 61 is highly flexible, it has a high degree of freedom in arrangement. The antenna can be brought closer to the window member 50, and high communication performance can be ensured.
  • the sensor 70 is installed in the plant equipment and detects its pressure, vibration, temperature, and the like.
  • a plurality of sensors 70 can be connected to the detection device 10, and are composed of, for example, a MEMS type pressure sensor 70A, a vibration sensor 70B, and a thermocouple type temperature sensor 70C, 70D (FIGS. 3 and 4).
  • the extension cable 72 is connected between the sensor 70 and the control circuit 16 or between the sensor 70 and the amplifier circuit 18 (for example, extension cables 72A and 72D) and is used to install the sensor 70 in a device away from the detection device 10. Be done.
  • the extension cable 72 may be freely increased or decreased within a range satisfying the intrinsically safe explosion-proof requirement, or the cable length of the sensor 70 itself may be extended.
  • the battery module 80 is, for example, a lithium battery, and supplies electric power to the control circuit 16 via the transformer circuit 17.
  • FIG. 3 shows a circuit diagram in the first aspect of the detection device 10.
  • the detection device 10 includes a first safety holding component S1 between the battery module 80 and the transformer circuit 17.
  • the first resistor R1 is connected in series to the wiring.
  • the first safety holding component S1 is mounted on the control board 14.
  • the first resistor R1 functions as a current limiting element that limits the current supplied from the battery module 80 to the transformer circuit 17.
  • the first safety-maintaining component S1 includes the first explosion-proof region E1 to which the battery module 80 belongs, the transformer circuit 17, the control circuit 16, the amplifier circuit 18, the sensor 70, and the extension cable 72 in the intrinsically safe explosion-proof requirement.
  • the second explosion-proof region E2 to which it belongs can be defined as another evaluation region.
  • the first explosion-proof region E1 and the second explosion-proof region E2 are arranged at a distance (for example, 1.5 mm) or more, which is regarded as another region in the intrinsically safe explosion-proof requirement.
  • FIG. 4 shows a circuit diagram in the second aspect of the detection device 10.
  • the detection device 10 further includes a second safety holding component S2 between the transformer circuit 17 and the control circuit 16.
  • a second resistor R2 is connected in series to the wiring, and two Zener diodes Z (Z1, Z2) are connected in parallel between the transformer circuit 17 and the second resistor R2.
  • the second safety holding component S2 is mounted on the control board 14.
  • the second resistor R2 functions as a current limiting element that limits the current supplied from the transformer circuit 17 to the control circuit 16.
  • the negative electrode is connected to the wiring and the positive electrode is grounded.
  • the Zener voltages of the Zener diodes Z1 and Z2 are substantially the same, but do not match because of variations.
  • one of the Zener diodes Z1 and Z2 functions as a voltage limiting element that limits the voltage applied from the transformer circuit 17 to the control circuit 16.
  • the other one of the Zener diodes Z1 and Z2 does not function as a voltage limiting element and is used for redundancy. Therefore, the Zener diode Z functions as a voltage limiting element even when one Zener diode Z is connected in parallel between the transformer circuit 17 and the second resistor R2.
  • the second safety holding component S2 has the second explosion-proof region E2 to which the control circuit 16, the amplifier circuit 18, the sensor 70, and the extension cable 72 belong, and the third explosion-proof region 17 to which the transformer circuit 17 belongs in the intrinsically safe explosion-proof requirement.
  • Explosion-proof area E3 can be defined as another evaluation area.
  • the first explosion-proof area E1, the second explosion-proof area E2, and the third explosion-proof area E3 are arranged at intervals (for example, 1.5 mm) or more, which are regarded as different areas according to the intrinsically safe explosion-proof requirements. ..
  • the wirings between the sensor 70, the extension cable 72, the amplifier circuit 18, the sensor 70 and the control circuit 16 all belong to the same explosion-proof region (second explosion-proof region E2). ing.
  • the sensors 70 for example, the sensor 70A and the sensor 70C
  • the circuit is short-circuited, and the installability and handling of the sensor 70 are improved.
  • the allowable inductance and the allowable capacitance of the second explosion-proof region E2 to which the sensor 70 and the extension cable 72 belong are calculated.
  • the total inductance of the circuit elements (for example, the control circuit 16, the amplifier circuit 18, and another circuit (not shown) connected to the control circuit 16) excluding the sensor 70 and the extension cable 72 in the second explosion-proof region E2 and Calculate the total capacitance.
  • the total inductance and the total capacitance are subtracted from the allowable inductance and the allowable capacitance, and the surplus inductance and the surplus capacitance in the second explosion-proof region E2 are calculated.
  • the cable length that can be used within the range of the surplus inductance and the surplus capacitance is calculated from the inductance and capacitance of the sensor 70 and the inductance and capacitance per unit length of the extension cable 72.
  • the usable cable length is the total cable length that can be used in the second explosion-proof region E2, and may be assigned to a plurality of sensors 70 or all of them may be assigned to one sensor 70. Alternatively, the number of sensors 70 may be reduced and their inductance and capacitance may be allocated to the cable length of the extension cable 72.
  • the transformer circuit 17 is set to the third explosion-proof region E3 by the second safety holding component S2, thereby limiting the inductance and capacitance of the second explosion-proof region E2. Is relaxed.
  • the detection device 10 The first explosion-proof area E1 to which the battery module 80 belongs, It includes a transformer circuit 17, a control circuit 16, and a second explosion-proof region E2 to which a plurality of sensors 70 belong.
  • the first explosion-proof region E1 and the second explosion-proof region E2 are divided by a first safety holding component S1 configured by the first resistor R1.
  • the detection device 10 does not consider that the circuit is short-circuited even if the sensors 70 come into contact with each other, and can satisfy the intrinsically safe explosion-proof requirement.
  • the detection device 10 The first explosion-proof area E1 to which the battery module 80 belongs, A second explosion-proof region E2 to which the control circuit 16 and the plurality of sensors 70 belong, A third explosion-proof region E3 to which the transformer circuit 17 belongs, The first explosion-proof region E1 and the third explosion-proof region E3 are divided by the first safety holding component S1 configured by the first resistor R1. The second explosion-proof region E2 and the third explosion-proof region E3 are divided by a second safety-holding component S2 composed of a second resistor R2 and a Zener diode Z.
  • the detection device 10 does not consider that the circuit is short-circuited even if the sensors 70 come into contact with each other, and can satisfy the intrinsically safe explosion-proof requirement. Further, by dividing the transformer circuit 17 into the third explosion-proof region E3, the limitation of the inductance and the capacitance of the second explosion-proof region E2 is relaxed.
  • the second resistor R2 is connected in series and the Zener diode Z is connected in parallel between the control circuit 16 and the transformer circuit 17.
  • the detection device 10 can limit the current by the second resistor R2 and limit the voltage by the Zener diode Z.
  • the Zener diode Z is arranged on the side of the transformer circuit 17.
  • the detection device 10 can limit the voltage applied from the transformer circuit 17 to the control circuit 16 by the Zener diode Z.
  • a plurality of Zener diodes Z are provided.
  • the detection device 10 is provided with a plurality of Zener diodes Z, so that the redundancy of the second safety maintaining component S2 can be enhanced.
  • the first resistor R1 is connected in series between the battery module 80 and the transformer circuit 17.
  • the detection device 10 can limit the current by the first resistor R1.
  • the second explosion-proof region E2 has an extension cable 72 between the control circuit 16 and at least one sensor 70.
  • the detection device 10 can allocate a usable cable length to the sensor 70 belonging to the second explosion-proof region E2 by using the extension cable 72.
  • the amplifier circuit 18 further belongs to the second explosion-proof region E2.
  • the detection device 10 adjusts the voltage input from the sensor 70 to a voltage suitable for the control circuit 16 while satisfying the intrinsically safe explosion-proof requirement.
  • the sensor 70 includes at least one of a pressure sensor, a temperature sensor, and a vibration sensor.
  • the detection device 10 can use the sensor 70 according to the application among a plurality of sensor types.
  • the detection device 10 has been described as an example when it is used in a petrochemical plant, it can also be used in other dangerous places.
  • dangerous places include LP gas filling stations, tunnel excavation sites, thermal power plants, painting factories, and the like.
  • the detection device 10 includes a pressure sensor, a vibration sensor, and a temperature sensor as examples of the sensor 70, but the present invention is not limited to this, and various sensors such as a flow rate sensor, a level sensor, and a strain sensor can be applied. it can.
  • the detection device 10 may include a power supply circuit that receives power from the outside instead of the battery module 80.
  • the detection device 10 may include three or more Zener diodes Z for the second safety maintaining component S2 of the second aspect.
  • the present invention is suitable as a detection device used in a petrochemical plant.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention concerne un dispositif de détection qui répond aux exigences de sécurité intrinsèque de protection contre les explosions même dans le cas où des capteurs entrent en contact l'un avec l'autre. Ce dispositif de détection 10 comprend : une première région de protection contre les explosions E1 dans laquelle se trouve un module de batterie 80 ; et une seconde région de protection contre les explosions E2 dans laquelle se trouvent un circuit de transformation de tension 17, un circuit de commande 16 et une pluralité de capteurs 70, la première région de protection contre les explosions E1 et la seconde région de protection contre les explosions E2 étant séparées par un premier composant de maintien de la sécurité S1 comprenant une première résistance R1.
PCT/JP2020/025064 2019-06-27 2020-06-25 Dispositif de détection WO2020262545A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019119341 2019-06-27
JP2019-119341 2019-06-27

Publications (1)

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WO2020262545A1 true WO2020262545A1 (fr) 2020-12-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112994220A (zh) * 2021-04-09 2021-06-18 北京中煤矿山工程有限公司 一种煤矿液压支架用不间断电源

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5227782A (en) * 1991-08-14 1993-07-13 Rosemount Inc. Hydrostatic interface unit
JPH1183420A (ja) * 1997-09-12 1999-03-26 Tokyo Sokki Kenkyusho:Kk ひずみ測定モジュール及び多点ひずみ測定システム
JP2002340647A (ja) * 2001-05-10 2002-11-27 Tokyo Keiso Co Ltd 熱式流量計
JP2007201895A (ja) * 2006-01-27 2007-08-09 Olympus Corp 防爆機器駆動装置
US20080079393A1 (en) * 2006-09-19 2008-04-03 David Spartano Instrinically safe battery powered power supply
US20110227551A1 (en) * 2010-03-22 2011-09-22 PINE VALLEY INVESTMENTS, INC., a Nevada corporation Mobile wireless communications device including removable electrical power supply module and related methods
US20130155564A1 (en) * 2011-12-15 2013-06-20 Siemens Aktiengesellschaft Intrinsically Safe Energy Limiting Circuit
WO2018021005A1 (fr) * 2016-07-27 2018-02-01 日本精機株式会社 Dispositif de communication
JP2018128213A (ja) * 2017-02-10 2018-08-16 株式会社テイエルブイ 防爆構造を有する電気回路

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5227782A (en) * 1991-08-14 1993-07-13 Rosemount Inc. Hydrostatic interface unit
JPH1183420A (ja) * 1997-09-12 1999-03-26 Tokyo Sokki Kenkyusho:Kk ひずみ測定モジュール及び多点ひずみ測定システム
JP2002340647A (ja) * 2001-05-10 2002-11-27 Tokyo Keiso Co Ltd 熱式流量計
JP2007201895A (ja) * 2006-01-27 2007-08-09 Olympus Corp 防爆機器駆動装置
US20080079393A1 (en) * 2006-09-19 2008-04-03 David Spartano Instrinically safe battery powered power supply
US20110227551A1 (en) * 2010-03-22 2011-09-22 PINE VALLEY INVESTMENTS, INC., a Nevada corporation Mobile wireless communications device including removable electrical power supply module and related methods
US20130155564A1 (en) * 2011-12-15 2013-06-20 Siemens Aktiengesellschaft Intrinsically Safe Energy Limiting Circuit
WO2018021005A1 (fr) * 2016-07-27 2018-02-01 日本精機株式会社 Dispositif de communication
JP2018128213A (ja) * 2017-02-10 2018-08-16 株式会社テイエルブイ 防爆構造を有する電気回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112994220A (zh) * 2021-04-09 2021-06-18 北京中煤矿山工程有限公司 一种煤矿液压支架用不间断电源

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