WO2023275924A1 - 温度測定装置、及び温度測定システム - Google Patents

温度測定装置、及び温度測定システム Download PDF

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Publication number
WO2023275924A1
WO2023275924A1 PCT/JP2021/024328 JP2021024328W WO2023275924A1 WO 2023275924 A1 WO2023275924 A1 WO 2023275924A1 JP 2021024328 W JP2021024328 W JP 2021024328W WO 2023275924 A1 WO2023275924 A1 WO 2023275924A1
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WIPO (PCT)
Prior art keywords
temperature
temperature sensor
ground
conductive material
measurement
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Ceased
Application number
PCT/JP2021/024328
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English (en)
French (fr)
Japanese (ja)
Inventor
裕貴 砂山
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Pacific Industrial Co Ltd
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Pacific Industrial Co Ltd
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.)
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Publication date
Application filed by Pacific Industrial Co Ltd filed Critical Pacific Industrial Co Ltd
Priority to JP2023531142A priority Critical patent/JPWO2023275924A1/ja
Priority to PCT/JP2021/024328 priority patent/WO2023275924A1/ja
Publication of WO2023275924A1 publication Critical patent/WO2023275924A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations

Definitions

  • the present disclosure relates to temperature measurement devices and temperature measurement systems.
  • Patent Document 1 discloses a temperature measuring device that measures the temperature of roads.
  • a temperature measurement device disclosed in Patent Document 1 includes a temperature sensor, a control device, and a transmission/reception circuit.
  • a temperature sensor measures the temperature of the road.
  • the controller acquires the measurement result of the temperature sensor.
  • the control device transmits the measurement result of the temperature sensor to the external device from the transmitting/receiving circuit.
  • the temperature of the ground changes gradually depending on factors such as the time of day, sunshine conditions, and vehicle traffic conditions. If the followability of the temperature sensor to the temperature change of the ground is poor, the discrepancy between the temperature of the ground and the measurement result of the temperature sensor increases. That is, the temperature of the ground cannot be measured with high accuracy.
  • a temperature measuring device comprising an installation body configured to be installed on the ground, and a temperature sensor configured to measure the temperature of the ground.
  • the installation body includes a bottom surface that contacts the ground, and a defining surface that defines a storage area that opens to the bottom surface.
  • the temperature sensor is housed in the housing area, and the temperature measuring device further comprises a thermally conductive material having a thermal conductivity higher than that of air. The thermally conductive material is provided between the temperature sensor and the ground.
  • the temperature of the ground is more easily transferred to the temperature sensor than when a space is provided instead of the heat-conducting material.
  • the measured temperature measured by the temperature sensor tends to follow the temperature of the ground. Therefore, the temperature measuring device can accurately measure the temperature of the ground.
  • the thermally conductive material may be provided between the temperature sensor and the defining surface.
  • the temperature measurement device may further include a transmission circuit configured to transmit the measurement result of the temperature sensor to an external device.
  • a second aspect of the present disclosure provides a temperature measurement system including a temperature measurement device and an external device.
  • the temperature measurement device includes an installation body configured to be installed on the ground, and a temperature sensor configured to measure the temperature of the ground.
  • the installation body includes a bottom surface that contacts the ground, and a defining surface that defines a storage area that opens to the bottom surface.
  • the temperature sensor is housed in the housing area.
  • the temperature measurement device further comprises a thermally conductive material having a thermal conductivity higher than that of air, and a transmission circuit configured to transmit the measurement results of the temperature sensor to the external device.
  • the thermally conductive material is provided between the temperature sensor and the ground.
  • the temperature measured by the temperature sensor easily follows the temperature of the ground. Therefore, the temperature measuring device can accurately measure the temperature of the ground.
  • the temperature measurement system may include a plurality of temperature measurement devices, and the external device may include a receiver configured to receive the measurement results of the plurality of temperature measurement devices.
  • the external device comprises a server
  • the receiver comprises a communication device configured to transmit the measurement results to the server
  • the server comprises a database for the measurement results.
  • FIG. 2 is a perspective view of a temperature measurement device included in the temperature measurement system of FIG. 1;
  • FIG. 3 is a cross-sectional view along line 3-3 of FIG. 2 showing the temperature measuring device;
  • FIG. 2 is a schematic configuration diagram of a temperature measurement device included in the temperature measurement system of FIG. 1;
  • 5 is a schematic diagram showing a database stored in the server of FIG. 4;
  • the temperature measurement system 10 includes one or more temperature measurement devices 20, one or more receivers 60, and one or more servers 70.
  • a plurality of temperature measuring devices 20 are arranged along each lane of the road R1.
  • Road R1 is paved.
  • a vehicle V1 passes through the road R1.
  • the road R1 has a road surface RS1.
  • the road surface RS1 which is the ground, is the surface of the paved road R1.
  • the temperature measuring devices 20 are spaced apart from each other.
  • the temperature measurement device 20 includes an installation body 21, a sensor unit 30, and a heat conductive material 51.
  • the installation body 21 is installed on the road surface RS1.
  • the installation body 21 is a road stud.
  • the installation body 21 has a truncated quadrangular pyramid shape.
  • the installation body 21 has a bottom surface 22 , a top surface 23 and four side surfaces 24 .
  • the bottom surface 22 , the top surface 23 and the side surfaces 24 are surfaces of the installation body 21 .
  • a side surface 24 extends between the bottom surface 22 and the top surface 23 .
  • the installation body 21 has a defining surface 25 .
  • the defining plane 25 includes a first defining plane 26 and a second defining plane 27 .
  • a first defining surface 26 is located between the bottom surface 22 and the top surface 23 .
  • a second delimiting surface 27 extends between the bottom surface 22 and the first delimiting surface 26 .
  • the second defining surface 27 is a peripheral wall surface extending from the bottom surface 22 toward the top surface 23 .
  • the second defining surface 27 has, for example, a square tubular shape.
  • the defining surface 25 defines a housing area S1.
  • the accommodation area S1 opens to the bottom surface 22 .
  • the accommodation area S1 is, for example, rectangular.
  • the installation body 21 is made of ABS resin, for example.
  • the sensor unit 30 includes a housing 31, a temperature sensor 34, a control device 35, a transmission circuit 38, a transmission antenna 39, and potting resin 40.
  • the housing 31 accommodates the temperature sensor 34, the control device 35, the transmission circuit 38, and the transmission antenna 39.
  • Housing 31 includes a first wall 32 and a second wall 33 .
  • the first wall 32 is flat.
  • the second wall 33 is a peripheral wall.
  • a second wall 33 extends from the periphery of the first wall 32 .
  • the temperature sensor 34 measures the temperature. Specifically, the temperature sensor 34 outputs a measurement result corresponding to its own temperature.
  • the control device 35 includes a processor 36 and a storage unit 37.
  • the processor 36 include MPU (Micro Processing Unit), CPU (Central Processing Unit), and DSP (Digital Signal Processor).
  • the storage unit 37 includes RAM (Random Access Memory) and ROM (Read Only Memory). Storage unit 37 stores program code or instructions configured to cause processor 36 to perform processes.
  • the control device 35 may be configured by a hardware circuit such as ASIC or FPGA.
  • the processing circuitry, controller 35 may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.
  • ROM and RAM or computer-readable media include any available media that can be accessed by a general purpose or special purpose computer.
  • the storage unit 37 stores an ID code indicating unique identification information of the corresponding temperature measuring device 20 .
  • the control device 35 generates frames.
  • the control device 35 outputs the generated frame to the transmission circuit 38 .
  • a frame is digital data and is a data string of binary numbers.
  • a frame consists of data in a format defined by the protocol.
  • the frame format includes, for example, preamble, ID code, temperature data, status code, and error detection code.
  • Temperature data is the measurement result of the temperature sensor 34 .
  • the transmission circuit 38 transmits from the transmission antenna 39 a radio signal modulated according to the frame input from the control device 35 .
  • the transmission circuit 38 transmits frames. Thereby, the measurement result of the temperature sensor 34 is transmitted from the transmission circuit 38 .
  • a radio signal is a signal in a predetermined frequency band. Examples of frequency bands include the LF band, MF band, HF band, VHF band, UHF band, and 2.4 GHz band.
  • the housing 31 is filled with potting resin 40 .
  • Urethane resin for example, is used as the potting resin 40 .
  • the sensor unit 30 is housed in the housing area S1.
  • the sensor unit 30 is accommodated in the accommodation area S1 such that the direction in which the second wall 33 extends from the first wall 32 and the direction from the top surface 23 to the bottom surface 22 are the same.
  • the heat-conducting material 51 is filled in the housing area S1.
  • the thermal conductivity of the thermally conductive material 51 is higher than that of air.
  • silicone is used as the thermally conductive material 51 .
  • the thermally conductive material 51 has a first portion 52 and a second portion 53 .
  • the first portion 52 is provided between a virtual plane IS ⁇ b>1 obtained by virtually extending the bottom surface 22 and the sensor unit 30 .
  • the first part 52 is provided so as to be flush with the bottom surface 22 or protrude from the accommodation area S1 to the outside of the accommodation area S1.
  • the first portion 52 is provided between the temperature sensor 34 and the virtual plane IS1.
  • the second portion 53 is provided between the defining surface 25 and the sensor unit 30 .
  • the second parts 53 are provided between the first defining surface 26 and the sensor unit 30 and between the second defining surface 27 and the sensor unit 30, respectively.
  • the second portion 53 is provided between the temperature sensor 34 and the defining surface 25 .
  • Potting resin 40 , housing 31 , and thermally conductive material 51 are located between temperature sensor 34 and defining surface 25 .
  • the temperature measuring device 20 is installed on the road R1 so that the bottom surface 22 is in contact with the road surface RS1.
  • the first portion 52 contacts the road surface RS1.
  • the first portion 52 is located between the sensor unit 30 and the road surface RS1. Therefore, it can be said that the first portion 52 is provided between the temperature sensor 34 and the road surface RS1.
  • the first portion 52 and the potting resin 40 are interposed between the temperature sensor 34 and the road surface RS1.
  • the receiver 60 includes a receiver control device 61, a receiving circuit 64, a receiving antenna 65, and a communication device 66.
  • the receiver control device 61 includes a processor 62 and a storage section 63 .
  • Processors 62 may include, for example, MPUs, CPUs, and DSPs.
  • the storage unit 63 includes ROM and RAM. Storage unit 63 stores program code or instructions configured to cause processor 62 to perform processing.
  • the receiver control device 61 may be configured by a hardware circuit such as ASIC or FPGA.
  • the processing circuitry, receiver controller 61 may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.
  • ROM and RAM or computer-readable media include any available media that can be accessed by a general purpose or special purpose computer.
  • the receiving antenna 65 receives the radio signal transmitted from each temperature measuring device 20 .
  • the receiving circuit 64 demodulates the radio signal received via the receiving antenna 65 to obtain the data contained in the frame.
  • the receiving circuit 64 outputs data to the receiver control device 61 .
  • the receiver control device 61 acquires the measurement result of the temperature sensor 34 .
  • the receiver 60 receives the measurement result of the temperature sensor 34 by receiving the wireless signal transmitted from the temperature measuring device 20 .
  • the communication device 66 is a network device that includes a communication control unit, ports, etc., and can transmit and receive information through the communication network NW.
  • the communication device 66 is connected to the server 70 via the communication network NW.
  • the receiver 60 is arranged so that it can receive wireless signals from the temperature measuring device 20 .
  • the receiver 60 is attached, for example, to a structure UP1 provided along the road R1. Examples of this type of structure UP1 include guardrails and utility poles. In the example shown in FIG. 1, the receiver 60 is attached to a utility pole.
  • the server 70 has a database DB1.
  • the number of servers 70 may be plural or may be one.
  • the database DB1 is a set of data regarding the measured temperature measured by the temperature measuring device 20 .
  • Receiver 60 and server 70 are external devices.
  • the database DB1 created by the server 70 associates the measured temperature with the measurement time and the measurement position.
  • the measurement time is the time when the temperature sensor 34 measures the temperature of the road surface RS1.
  • a measurement position is a position where each temperature measurement device 20 is provided.
  • the position of each temperature measuring device 20 is represented, for example, by coordinates of a coordinate system representing absolute positions on the earth.
  • a coordinate system of this kind can be, for example, a geographic coordinate system.
  • the position of each temperature measuring device 20 may be specified from the ID code included in the radio signal. To achieve this, information in which the ID code of each temperature measuring device 20 is associated with the coordinates of each temperature measuring device 20 is pre-stored in the server 70 or the receiver 60 . In this case, the receiver 60 or server 70 identifies the location of each temperature measurement device 20 .
  • each temperature measurement device 20 may transmit a radio signal including information indicating the position of each temperature measurement device 20 .
  • the server 70 provides services to users. Services are provided as a cloud. A cloud is one form of computer usage that accumulates data and provides services. As a service, for example, provision of the database DB1 can be mentioned.
  • the server 70 may also provide the user with information regarding the road surface RS1 derived based on the database DB1.
  • the information on the road surface RS1 derived based on the database DB1 includes, for example, information on the freezing of the road surface RS1. Whether or not the road surface RS1 is frozen can be estimated from the measured temperature and the measured position. If the measured temperature is 0 degrees or less, it can be estimated that the measurement position associated with the measured temperature is frozen.
  • the server 70 or a management computer connected to the server 70 estimates whether the road surface RS1 is frozen.
  • the server 70 then provides information on the road surface RS1 to the user via the cloud.
  • the server 70 provides information on the road surface RS1 to the user through at least one of a web browser and an application.
  • Information about the road surface RS1 may be provided as text or as an image. Accordingly, when the measured temperature is 0 degrees or less, it is possible to alert the user that the road surface RS1 may be frozen.
  • the temperature of the road surface RS1 is transmitted to the temperature sensor 34, so that the temperature sensor 34 measures the temperature of the road surface RS1.
  • the temperature of the road surface RS1 is conducted to the temperature sensor 34 via the thermally conductive material 51.
  • the thermal conductivity of the thermally conductive material 51 is higher than that of air. Therefore, the temperature of the road surface RS1 is more easily conducted to the temperature sensor 34 than when a space is provided instead of the heat conductive material 51 .
  • the thermally conductive material 51 is provided between the temperature sensor 34 and the road surface RS1. Since the temperature of the road surface RS1 is easily conducted to the temperature sensor 34, the temperature measured by the temperature sensor 34 easily follows the temperature of the road surface RS1. Therefore, the temperature measuring device 20 can accurately measure the temperature of the road surface RS1.
  • the thermally conductive material 51 has a second portion 53 .
  • the second portion 53 is provided between the temperature sensor 34 and the defining surface 25 .
  • the temperature of the road surface RS1 is also transmitted to the temperature sensor 34 via the second portion 53 .
  • the path through which the temperature of the road surface RS1 is conducted to the temperature sensor 34 can be increased. Therefore, it becomes easier for the temperature measured by the temperature sensor 34 to follow the temperature of the road surface RS1.
  • the temperature measurement device 20 has a transmission circuit 38 .
  • the transmission circuit 38 can transmit the measurement result of the temperature sensor 34 to an external device.
  • a measurement result of the temperature sensor 34 can be provided to an external device.
  • External devices are the receiver 60 and the server 70 .
  • a measurement result of the temperature sensor 34 is transmitted to the receiver 60 and further transmitted from the receiver 60 to the server 70 .
  • the receiver 60 receives the measurement results of the plurality of temperature measurement devices 20 and transmits the measurement results to the server 70 , so that the communication device 66 may be provided only in the receiver 60 . Therefore, compared to the case where the communication device 66 is provided for each temperature measurement device 20, the manufacturing cost of the temperature measurement device 20 can be reduced. In addition, compared to the case where the communication device 66 is provided for each temperature measurement device 20, communication costs for communication with the server 70 can be reduced.
  • the temperature of the road R1 may be measured by the temperature sensor 34.
  • the temperature sensor 34 is provided so as to measure the temperature of the road surface RS1, and the heat conductive material 51 is interposed between the temperature sensor 34 and the road surface RS1. This makes it possible to measure the temperature of the road surface RS1 while improving the ability of the temperature sensor 34 to follow the temperature change of the road surface RS1.
  • the thermally conductive material 51 is provided between the temperature sensor 34 and the road surface RS1, and the thermally conductive material 51 does not have to be in contact with the road surface RS1.
  • a space may exist between the thermally conductive material 51 and the road surface RS1 or between the thermally conductive material 51 and the temperature sensor 34 .
  • the provision of the thermally conductive material 51 reduces the volume of the space existing between the temperature sensor 34 and the road surface RS1, so that the temperature of the road surface RS1 is easily conducted to the temperature sensor 34.
  • the heat conductive material 51 may be provided at least between the temperature sensor 34 and the road surface RS1. That is, the heat-conducting material 51 may not have the second portion 53 .
  • the second portion 53 may be provided only between the sensor unit 30 and the first defining surface 26 and between the sensor unit 30 and the second defining surface 27 .
  • the temperature measurement device 20 may be provided on the unpaved ground.
  • the temperature measurement device 20 may include a pressure sensor.
  • a pressure sensor is provided to measure the atmospheric pressure.
  • the pressure sensor measurement results may be sent to the server 70 .
  • the measurement results of the pressure sensor can be used, for example, for weather forecasting.
  • the temperature measurement device 20 does not have to include the transmission circuit 38 .
  • the temperature measurement device 20 may be configured to store the measured temperature measured by the temperature sensor 34 in association with the measurement time. That is, the temperature measuring device 20 may be used as a data logger.
  • the temperature measurement system 10 may include at least one of a display unit and a light emitting unit. At least one of the display section and the light emitting section may be provided in the temperature measurement device 20 . When at least one of the display section and the light emitting section is provided in the temperature measurement device 20, at least one of the display section and the light emitting section is provided on the outer surface of the installation body 21, for example.
  • the control device 35 may estimate whether the road surface RS1 is frozen from the measurement result of the temperature sensor 34 . For example, the control device 35 may estimate that the road surface RS1 is frozen when the measurement result of the temperature sensor 34 is 0 degrees or less.
  • the control device 35 estimates that the road surface RS1 is frozen, it performs display on the display unit and light emission from the light emitting unit. As a result, a warning may be given to people around the installation body 21 .
  • At least one of the display unit and the light emitting unit may be included in the receiver 60 or may be provided separately from the receiver 60 .
  • the receiver control device 61 may estimate whether the road surface RS1 is frozen from the measurement result of the temperature sensor . Then, when the receiver control device 61 estimates that the road surface RS1 is frozen, it performs display on the display unit and light emission from the light emitting unit. As a result, the attention of people around the receiver 60 can be called.
  • the temperature measurement device 20 may include an acceleration sensor.
  • the acceleration sensor measures acceleration applied to the acceleration sensor.
  • an impact is applied to the installation body 21.
  • - ⁇ As a result a larger acceleration is applied to the acceleration sensor than when the vehicle V1 does not pass over the installation body 21 . Therefore, when an accident occurs, checking the measurement result of the acceleration sensor at the time when the accident occurred can be useful for grasping the route that the vehicle V1 has passed.
  • the temperature measurement device 20 may include a communication device.
  • a communication device is a network device that includes a communication control unit, a port, and the like, and can transmit and receive information through a communication network NW.
  • the communication device is connected to the server 70 via the communication network NW.
  • the control device 35 may transmit the measurement result of the temperature sensor 34 to the server 70 via the communication device.
  • temperature measurement system 10 may not include receiver 60 . That is, the measurement result of the temperature sensor 34 may be directly transmitted from the temperature measuring device 20 to the server 70 or may be transmitted to the server 70 via the receiver 60 . It can be said that the external device may be only the server 70 or may be the receiver 60 and the server 70 .
  • the external device may be only the receiver 60 .
  • the receiver 60 receives the measurement results transmitted from the plurality of temperature measurement devices 20 and stores the measurement results.
  • the temperature measurement system 10 is used as a data logger.
  • a lane separator may be used as the installation body 21 .
  • a utility pole, a sign, or the like may be used as the installation body 21 .
  • the receiving antenna 65 of the receiver 60 may be provided outside the installation body 21 if the installation body 21 is made of a material that does not easily transmit radio signals.
  • the installation body 21 is not limited to an existing one, and may be one dedicated to the temperature measurement device 20 .
  • the shape of the installation body 21 may be changed as appropriate.
  • the sensor unit 30 may not include the housing 31 .
  • the temperature sensor 34, the control device 35, the transmission circuit 38, and the transmission antenna 39 may be accommodated in the accommodation area S1, and the accommodation area S1 may be filled with the thermally conductive material 51.
  • ⁇ There may be only one temperature measuring device 20 .
  • DB1...Database RS1...Road surface as the ground, S1...Accommodation area, 10...Temperature measurement system, 20...Temperature measurement device, 21...Installation body, 22...Bottom surface, 25...Definition surface, 34...Temperature sensor, 51...Heat Conductive material 60 -- Receiver as external equipment 66 -- Communication device 70 -- Server as external equipment.

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PCT/JP2021/024328 2021-06-28 2021-06-28 温度測定装置、及び温度測定システム Ceased WO2023275924A1 (ja)

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JP2023531142A JPWO2023275924A1 (https=) 2021-06-28 2021-06-28
PCT/JP2021/024328 WO2023275924A1 (ja) 2021-06-28 2021-06-28 温度測定装置、及び温度測定システム

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01248031A (ja) * 1988-03-29 1989-10-03 Agency Of Ind Science & Technol 地表面温センサー
JPH0447636U (https=) * 1990-08-28 1992-04-22
JP2010071955A (ja) * 2008-09-22 2010-04-02 Kictec Inc 道路付属物及び道路付属物を用いた温度観測システム
JP2014528035A (ja) * 2011-09-11 2014-10-23 ソーラー ブライト リミテッドＳｏｌａｒ Ｂｒｉｇｈｔ Ｌｉｍｉｔｅｄ ロードマーカーまたはライト式警告装置
US20200199832A1 (en) * 2017-04-25 2020-06-25 MZC Foundation, Inc. Apparatus, system, and method for smart roadway stud control and signaling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01248031A (ja) * 1988-03-29 1989-10-03 Agency Of Ind Science & Technol 地表面温センサー
JPH0447636U (https=) * 1990-08-28 1992-04-22
JP2010071955A (ja) * 2008-09-22 2010-04-02 Kictec Inc 道路付属物及び道路付属物を用いた温度観測システム
JP2014528035A (ja) * 2011-09-11 2014-10-23 ソーラー ブライト リミテッドＳｏｌａｒ Ｂｒｉｇｈｔ Ｌｉｍｉｔｅｄ ロードマーカーまたはライト式警告装置
US20200199832A1 (en) * 2017-04-25 2020-06-25 MZC Foundation, Inc. Apparatus, system, and method for smart roadway stud control and signaling

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