JP2021068297A - Time-series data collection/analysis assistance system and program - Google Patents

Abstract

To provide a time series data collection/analysis assistance system, etc., which overcome the problem of trade-off between accuracy (certainty) and cost.SOLUTION: A system provides an IoT terminal, which cannot receive a GNSS signal, with time information and position information from an iPNT, collects as time-series data the data transmitted from the IoT terminal, and assists analysis of the time-series data. The system is characterized in that the time information and the position information from the iPNT are managed, and a parent terminal among radio communication terminals synchronizing with the system is provided with the managed time information and the managed position information from the iPNT.SELECTED DRAWING: Figure 1

Description

The present invention relates to a system and the like for widely supporting the collection and analysis of time series data, and more specifically, a system and the like for supporting the collection and analysis of time series data having time information.

Conventionally, in a plant such as a power plant, time-series sensing information such as logging data, process data, and event data is collected every second from each device installed in the plant or a manufacturing device in the factory via a sensor. Plant maintenance has been achieved by evaluating and analyzing these.

It is said that the plant collects tens of thousands of operation data per second per site. If all the operation data measured in the plant is collected and stored as it is in the storage on the server, several gigabytes of data will be accumulated in the storage every day, so some measures have been taken to efficiently compress these data. (Patent Document 1).

In addition, the following method has been proposed as a tool for monitoring and diagnosing the operating status of a generator (Patent Document 2).

That is, according to Patent Document 2, it is a method implemented in a computer for evaluating the operation of a generator, and diagnostic data including a series of data observed by a first sensor in the generator over a certain period of time is used. The step of acquiring from the first sensor, the step of evaluating the diagnostic data by the computer system and determining whether or not an abnormality exists when the diagnostic data is acquired, and the step of determining whether or not an abnormality exists by the computer system, and the step of determining the abnormality by the computer system. Disclosed is a method comprising providing a failure code indicating the nature of the error in the generator that caused the anomaly, based on the determination that is present.

On the other hand, methods and the like for indoor high-precision position reference measurement have also been proposed, and for example, methods and devices for realizing the generation of practical high-precision indoor positioning results based on GPS technology have been proposed (Patent Documents). 3).

That is, according to Patent Document 3, it is a method in a mobile communication network for providing a high-precision position reference measurement result in an indoor position, and is a method executed in one or a plurality of network nodes. , A step of providing a list of a plurality of positions accessible to the mobile user device, a step of requesting the mobile user device for high-precision positioning, and whether the high-precision positioning has failed by acquiring the high-precision positioning result. A step of determining whether or not, and a step of storing an information entity including one position from the list of the plurality of positions received from the mobile user device and at least one of a time stamp or an ID of the mobile user device. , A method having a step of supplying the information entity to another network node is disclosed.

WO2011 / 135606 Japanese Unexamined Patent Publication No. 2012-075308 Special Table 2009-525483

However, conventionally, when collecting time-series data from sensors installed in equipment or devices in a plant such as a power plant, a certain degree of synchronization of the time-series data sent from each place is required. For example, it cannot be evaluated as an event occurring in the equipment, equipment, or the entire plant). On the other hand, when the positioning technology described in Patent Document 3 (for example, logging the positioning time) is implemented for each sensor in order to improve the synchronism, the positioning reliability of all the sensors is reliable. In terms of cost, the hurdle for realization becomes high.

Moreover, in recent years, ICT of buildings called smart buildings has been promoted. As for buildings such as buildings, aging of old buildings has become a social problem as an example, and there is a requirement on the facility side to introduce a system for evaluating the soundness of the buildings. In this case, it can be said that time synchronization between the accelerometers installed in each part of the building is indispensable for constructing the seismic soundness system of the building or the building. Here, if the time synchronization source is a GNSS satellite signal, high-precision time timing synchronization can be realized anywhere by the GPS common view (GPS Command View), but each sensor is equipped with a GNSS receiver. It is not easy to secure the conditions.

Therefore, an object of the present invention is to provide a time-series data collection / analysis support system or the like that overcomes the problem of trade-off between accuracy (certainty) and cost.

The time-series data collection / analysis support system according to the present invention provides time information and position information from the iPNT to the IoT terminal that cannot receive the GNSS signal, and collects the data transmitted from the IoT terminal as time-series data. However, there is a system that supports the analysis of the time-series data, which manages the time information and the position information from the iPNT, and manages the parent terminal among the wireless communication terminals that are synchronized with the system. It is characterized in that it provides the time information and the position information of the iPNT.

Further, time information and position information from the iPNT are given to the data received from the IoT terminal that cannot receive the GNSS signal, and at least the data to which the time information is given is collected as time series data, and the time series data is collected. It is a system for supporting analysis, manages time information and position information from the iPNT, aggregates data from the IoT terminal, and applies the time information and position information of the iPNT to the aggregated data. It is characterized by being engraved.

According to the time-series data collection / analysis support system or the like according to the present invention, it is possible to provide a time-series data collection / analysis support system or the like that overcomes the problem of trade-off between accuracy (certainty) and cost.

It is explanatory drawing explaining the system structure concept of the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the system structure concept of the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the circuit configuration example of the S2 modulator in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the structural concept of the signal transmitted from the S2 modulator in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the circuit configuration example of the S2 demodulator in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the system configuration concept of the iPNT transmitter (IMES-TS transmitter) in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the message structure of the iPNT transmitter (in the case of IEMS-TAS transmitter) in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the message structure of the iPNT transmitter (in the case of IEMS-TAS transmitter) in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the system configuration concept of the receiver (iPNT receiver) in the time synchronization system including the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is a flowchart for demonstrating the operation flow in the time-series data collection / analysis support system which concerns on one Embodiment of this invention. It is a flowchart for demonstrating the detailed flow of processing in the time series data collection / analysis support system which concerns on one Embodiment of this invention. It is explanatory drawing explaining the data format example of the data generated in the time series data collection / analysis support system which concerns on one Embodiment of this invention.

(Definition of terms)
First, the terms used in this embodiment are defined.
[IPNT]
IPNT is an abbreviation for "Indoor Position, Navigation, Timing", which uses GNSS compatible signals to broadcast highly accurate time, timing, position coordinates, and message information in an indoor space to achieve highly accurate time synchronization. It refers to the mechanism.
Specifically, a TAS device that receives a GNSS signal in the sky generates a unique time message, and the message is distributed as a broadcast in the building using a transmission path such as an existing TV co-viewing system. is there. Here, the iPNT transmitter is installed at an arbitrary place where the GPS signal (iPNT signal) is to be transmitted, and the iPNT signal (GNSS signal) is transmitted in the same manner as the IMESS. The GNSS receiver that has received the iPNT can output a highly accurate synchronization signal (1PPS) by reading the time message at the same time as reading the position information and the message.
[IMES]
IMES is an abbreviation for "Indoor Messaging System", and the IMES signal is a pseudo signal for complementing the GNSS signal.
[IMESS-TS signal]
IMES-TS is an abbreviation for "Indoor Messaging System --Timing Sync", and the IMES-TS signal is typically a signal including a position (Position), a time (Clock), and a timing signal (Timing). ..
[IMESS-TAS signal]
IMES-TAS is an abbreviation for "Indoor Messaging System --Timing Authentication Sync", and the IMES-TAS signal is an IMES-TS signal with authentication information added.
[Engraved]
The marking in the present embodiment means a process of adding time information and authentication information to the arrival or reception data. The data to which the time information and the authentication information are added can be treated as a new data set thereafter.

(Basic operation concept of the present invention)
In order to understand the present invention, first, the basic operation concept of the present invention will be described. A typical scene to which the present invention is applied is to aggregate data from sensor data installed in a building or facility and transmit it to an analysis server such as PIMS (operation information management system), but the data is aggregated. A network node such as a gateway (Gateway, GW) or a hub (Hub) is adopted as the device to be used. The network node according to the embodiment of the present invention realizes the following functions.

(1) A function to stamp the time (and authentication key if necessary) on the data passing through the network node.
(2) A function of engraving position information indicating the geographical position of the network node in (1) above.
(3) Indoors, the time and position (and if necessary) when the packet was generated for each data packet using the position information, time information, and timing output from the GNSS terminal that received the iPNT transmitter signal. Ability to store the authentication key).
(4) A function of stamping the position, time (and authentication key if necessary) using the output from the GNSS receiver that received the transmission from the iPNT.
(5) Provision of Authentication Service Using Location and Time An authentication service for proving "when" and "where" (for example, TOTP described later) can be provided. In cloud services, E-comus services, etc., in addition to user authentication for proving "who", constraints such as "when" and "where" can be controlled. By using such an authentication service, for example, it functions predominantly as a geo-fence against cloud services.

In addition, when constructing a seismic soundness system for a building, it is necessary to synchronize the acceleration sensors installed in different locations and transmit the data to an analysis server or the like in order to analyze the synchronized data. The present invention is configured to achieve this.
The present invention also assumes that IoT sensor data around the equipment is collected and transmitted in addition to the acceleration sensor. These data often do not include time data (time information) at the time of sensing, and even if time data (time information) is included, the time standard is not unified. Therefore, for example, when data of different types of sensors are combined and analyzed, it is necessary to unify the time, and the present invention is configured to realize these.

In general, for IoT data aggregated from IoT sensors, ensuring the quality in terms of security such as data soundness and reliability is an issue. The reason is that many IoT sensors are not rich in terms of structure and mechanism, and it is not easy to implement the same encryption technology as information terminal devices such as PCs and smartphones.

Hereinafter, the time-series data collection / analysis support system and the like according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a system configuration of a time-series data collection / analysis support system according to an embodiment of the present invention. In FIG. 1, the time-series data collection / analysis support system 100 in a broad sense includes an iPNT transmitter 101, an iPNT receiver 110, an IoT gateway (GW) 120, a vibration sensor 131, an IoT sensor 132, and an LPWA (Low Power, Wide Area). Includes communication devices 141a, 141b, BT (Bluetooth: Registered Trademark) communication devices 142a, 142b, WiFi devices 143a, 143b, and IoT sensors 151-153. 141a, 142a, and 143a are parent terminals, respectively, and 141b, 142b, and 143b are child terminals with respect to each.
Further, the IoT gateway (GW) 120 is an IoT device or an IoT terminal, and the IoT sensor such as the vibration sensor 131 and the IoT sensor 132 is an IoT terminal or an IoT device. In this respect, the IoT gateway (GW) 120 and the IoT sensors such as the vibration sensor 131 and the IoT sensor 132 both have the property of exhibiting the function as an IoT terminal.

In one embodiment, the LPWA communication device 141a, the BT communication device 142a, and the WiFi device 143a are each synchronized with the IoT gateway (GW) 120 (synchronization of time, timing, etc.).

In one embodiment, the iPNT receiver 110 and the IoT gateway (GW) 120 constitute a time-series data collection / analysis support system 100b in a narrow sense according to the embodiment of the present invention (in this case, including the iPNT receiver 110). It is called GW.) As shown in the figure, in one embodiment, the data transmitted from the iPNT receiver 110 to the IoT gateway (GW) 120 includes (1) GPS time, (2) location information and / or authentication information, and (3). ) PPS (highly accurate motivation signal), (4) 10 MHz reference signal.
Further, in another embodiment of the present invention, it is also realized as a time synchronization system including a time series data collection / analysis support system according to one embodiment of the present invention (described later with reference to FIGS. 2 to 6). ..

The vibration sensor 131 in FIG. 1 measures individual displacement (unit: m), speed (unit: m / s), and acceleration (unit: m / s) in order to measure any of linear vibration, bending vibration, and torsional vibration. It is a known sensor that measures ^2). As the measurement method, a capacitance type, an eddy current type, a laser Doppler type, and an electromagnetic type are adopted.

The IoT sensor 132 typically includes an acceleration sensor and a temperature sensor, but the present invention is not limited thereto. Various sensors such as a photoelectric sensor, a proximity sensor, a flow rate sensor, a current sensor, a humidity sensor, and a proximity sensor can be adopted.
The same applies to the IoT sensors 151 to 153 that are wirelessly connected to the IoT gateway 120.

As shown in FIG. 1, as a wireless connection form between the IoT gateway 120 and the IoT sensors 151 to 153, LPWA communication devices 141a and 141b are adopted, BT communication devices 142a and 142b are adopted, and a WiFi communication device is adopted. Various connection forms can be adopted, such as adopting 143a and 143b. Further, in one embodiment, the master unit of wireless communication such as the LPWA communication device 141a, the BT communication device 142a, and the WiFi device 143a is synchronized with the IoT gateway (GW) 120 in terms of time, timing, and the like.

In one embodiment of the present invention, timeless data is transmitted from each sensor (131-132, 151-153). The timing of these data transmissions varies and is not synchronized. In one embodiment of the present invention, various data sent from each sensor are aggregated in the IoTGW 120, and time information and the like are stamped together for each predetermined time unit.

Therefore, in FIG. 1, the data output from the IoT gateway 120 (details thereof will be described later) includes the “sensor data packet”, the “time received by the IoTGW”, and the “position received by the IoTGW” in one embodiment. Is included, and if necessary, an "authentication code received by IoTGW" is also included.

In one embodiment of the present invention, the output data from the IoT gateway 120 is modulated or converted as necessary and transmitted to the analysis server 170 via the network 160. In the analysis server 170, the transmitted output data is stored in a database (DB) (not shown), such as being classified according to each ID / type. Then, in the storage analysis server 170, the data group is read from the DB and processed as needed (at this time, the read data can be rectified in time). In one embodiment, the time-based rectified data set is utilized by the seismic monitor application 171, the smart building management application 172, and the other application 173 (cut out, processed, and not shown as needed). Visually presented to).

Here, the analysis server 170, the seismic monitoring application 171 and the smart building management application 172, and other applications 173 constitute an analysis system.

In addition, in one embodiment, information services are provided from the analysis server 170 to other servers, terminals, and the like via the Internet line 199.

(Example of analysis system)
In one embodiment of the present invention, the PI System of OSIsoft can be adopted as the analysis system. PI System is a PIMS (operation information management system) that visualizes and shares information (production results, quality information, equipment utilization rate, etc.) necessary for operation performance management of equipment, etc. in real time.
In one embodiment of the present invention, the analysis system can provide time-series predictive information in real time, for example, with users and systems across various industries (oil / gas, electric power, mining, manufacturing, etc.). , Can collect, analyze, visualize, and share highly reliable time series data from multiple data sources.

Analysis servers can also work with a wide variety of interfaces to collect frequently used data (both time series and event-based) with different formats, standards or naming conventions from multiple systems or sources. .. The information collected is combined, compared, meaningfulized and transformed into a unified structure.

These data are accessible in real time and can be visualized and presented to the user. In one embodiment, the device that realizes visualization is not limited to a PC and a laptop, but also includes a mobile information terminal such as a tablet and a smartphone. Users will be able to make quick decisions based on the visualization data presented.

FIG. 2 shows a system configuration of a time synchronization system including a time series data collection / analysis support system according to an embodiment of the present invention. The time-series data collection / analysis support system according to the embodiment of the present invention can also be positioned as a subsystem in the time synchronization system shown in FIG. In this case, in FIG. 2, the S3 transmitter 220 corresponds to the iPNT transmitter 101 of FIG. 1, and the base station 300-1 corresponds to the iPNT-compatible GNSS receiver 110 of FIG.

The time synchronization system shown in FIG. 2 is also a mobile communication system including a "time synchronization system", and the processing and functions of this system are hierarchically configured as shown in FIG. Is a feature. Each layer of processing and function here is called a "segment". Then, as shown in FIG. 2, the process and function of acquiring necessary information from the GNSS signal or the like is referred to as "segment 1" or "S1". Further, the process and function of transmitting the information necessary for generating the IMES-TAS signal or the IMES-TS signal is referred to as "segment 2" or "S2". Further, the processing and function related to the generation and transmission of the IMES-TAS signal or the IMES-TS signal shall be referred to as "segment 3" or "S3".

In the following description, in order to indicate which segment the function belongs to, descriptions such as "S1", "S2", and "S3" may be added to the description.

(Relationship between the system shown in FIG. 1 and the system shown in FIG. 2)
The system shown in FIG. 1 is one of the best forms of the time series data collection / analysis support system according to the embodiment of the present invention, but is not limited thereto. The system shown in FIG. 2 is an example of a system configuration that is the basis of the idea of the system configuration shown in FIG. Although the system shown in FIG. 2 has each function of the system shown in FIG. 1, those skilled in the art can adopt various design variations, and the correspondence between the modules is not necessarily the same. Not fixed.
Hereinafter, for the purpose of understanding the present invention, the individual module functions and the like in one embodiment of the present invention will be described while clarifying the correspondence with the modules in the system shown in FIG. 1 based on the system shown in FIG. explain.

For convenience of the present invention, the code numbers in FIG. 1 are unique to FIG. 1, and are basically different from those of the code numbers of FIGS. 2 and later with the same code numbers. On the other hand, the same code numbers in FIGS. 2 and 2 basically refer to the same ones.

In FIG. 2, the reference unit 100 includes a GNSS receiver 110 for processing a GNSS signal received via the GNSS antenna 102 and an S2 modulator 120 for generating a transmission RF signal for generating an IEMS-TAS signal. (S2TX) and is included. FIG. 2 shows a configuration example in which the GNSS receiver 110 and the S2 modulator 120 are mounted in the reference unit 100, but the present invention is not limited to this, and each device is mounted independently. You may. In one embodiment of the present invention, the reference unit 100 acquires information that serves as a reference for time synchronization based on the GNSS signal, but the information that serves as a reference for time synchronization is not limited to the GNSS signal and includes other information. You may use it.

Further, in one embodiment of the present invention, the secret key for the reference unit 100 to generate the authentication code may be configured to be provided to the transmission unit 200. In this case, the reference unit 100 may be configured to receive a secret key issued by an arbitrary authentication server 108 and transmit a transmission RF signal including the secret key to the transmission unit 200. Further, the authentication server 108 and the reference unit 100 may be configured to be communicable via a network 109 such as the Internet or a private network.

In one embodiment of the present invention, the transmission unit 200 can generate an authentication code based on the time information provided by the reference unit 100. That is, the authentication code corresponds to a message having a predetermined length calculated based on the time information acquired by the GNSS receiver 110 that functions as the reference time acquisition unit. As such an authentication code, for example, a one-time password (TOTP: Time-Based One-Time Password) that depends on the current value of the time or the like can be used. Hereinafter, the authentication code is also referred to as "TOTP". By transmitting such TOTP in combination with position and time information, position authentication and the like can be realized.

Further, the transmission unit 200 includes an S2 demodulator 210 (S2RX) that demodulates the transmission RF signal transmitted from the S2 modulator 120, and an S3 transmitter 220 (S3 transmitter 220) that generates an IEMS-TAS signal from the demodulation result of the S2 demodulator 210. S3TX) and included. Although FIG. 2 shows a configuration example in which the S2 demodulator 210 and the S3 transmitter 220 are mounted in the transmission unit 200, each device may be mounted independently.

In one embodiment of the present invention, the time synchronization system shown in FIG. 2 can provide at least the following services.
(1) Provision of indoor positioning services Positioning services and hierarchies compatible with GNSS even indoors where GNSS signals from GNSS (GPS, Quasi-Zenith Satellite System (QZSS), etc.) cannot be received. Can provide information.

(2) Provision of time information synchronized with GNSS It is possible to provide information on the year, month, day, hour, minute, and second synchronized with GNSS. Leap years and leap seconds are also considered.

(3) Provision of Timing Source Synchronized with GNSS A timing signal (for example, 1 second pulse signal / 1 PPS signal) synchronized with GNSS (GPS, QZSS, etc.) can be provided.

(4) Provision of frequency source synchronized with GNSS It is possible to provide a frequency source (clock) that can be used for comparative calibration with GNSS (GPS, QZSS, etc.).

(5) Provision of Authentication Service Using Location and Time An authentication service for proving "when" and "where" (for example, TOTP described later) can be provided. In cloud services, E-comus services, etc., in addition to user authentication for proving "who", constraints such as "when" and "where" can be controlled. By using such an authentication service, for example, it functions predominantly as a geo-fence against cloud services.

FIG. 3 shows an example of a circuit configuration of the S2 modulator 120 in a time synchronization system including a time series data collection / analysis support system according to an embodiment of the present invention. As shown in FIG. 3, the S2 modulator 120 includes an IF (Intermediate Frequency) signal generation circuit 121, a carrier oscillator 125, and an up-conversion circuit 126.

The IF signal generation circuit 121 processes the input signal from the GNSS receiver 110 and then outputs the BPSK-modulated IF signal. Input signals include time information and telemetry signals. A synchronization word (hereinafter, also referred to as “SYNC word”) is added to each set of time information and telemetry signal, and as will be described later, demodulation processing by the S2 demodulator 210 of the transmission unit 200 is easy. It has become.
As shown in FIG. 3, the IF signal generation circuit 121 includes a modulation circuit 122, a low pass filter (LPF) 123, and a digital analog converter (DAC) 124.

In one embodiment of the present invention, the modulation circuit 122 extracts the time information and the telemetry signal from the information contained in the input signal from the GNSS receiver 110 based on the timing signal from the GNSS receiver 110, and the SYNC After adding a word, NRZ-BPSK modulation is performed to generate a modulated signal. When the IMES-TAS signal includes an authentication code, the authentication code is input to the modulation circuit 122, and a modulation signal including the authentication code is generated.

In one embodiment of the present invention, the band of the signal after NRZ-BPSK modulation is limited by an FIR (Finite Impulse Response) filter. For example, the modulation circuit 122 receives an input of a frequency TBD [MHz] corresponding to an empty channel on a transmission path on which a transmission RF signal is superimposed, and outputs a modulation signal having a center frequency of TBD. In one embodiment of the invention, the bit rate of the modulated signal is 1 Mbps. However, the modulation method and bit rate of the modulated signal are not particularly limited to the above-mentioned configuration, and the optimum one can be appropriately selected according to the required specifications, the system configuration, and the like. For example, QPSK (four phase shift keying) modulation may be used instead of BPSK (two phase shift keying) modulation, or NRZI (Non Return) may be used instead of the NRZ (Non Return to Zero) method. You may use the to Zero Inversion) method or the like. With such a change in the modulation method, the bit rate and the like can be changed as appropriate.

The modulation signal output from the modulation circuit 122 is analog-converted by the digital-to-analog converter 124 after the band is limited by the low-pass filter 123, and is output as an IF signal. The modulation circuit 122 or the modulation circuit 122 and its peripheral circuits may be digitally processed by using an FPGA (field-programmable gate array).

In one embodiment of the present invention, the up-conversion circuit 126 up-converts the IF signal from the modulation circuit 122 with a carrier wave (for example, 10 MHz) from the carrier oscillator 125 and outputs it as a transmission RF signal. Specifically, the up-conversion circuit 126 includes a mixer 127, a variable amplifier 128, and a low-pass filter 129. The mixer 127 multiplies the IF signal from the modulation circuit 122 by the carrier wave from the carrier oscillator 125. The signal output from the mixer 127 is output as a transmission RF signal through the variable amplifier 128 and the low-pass filter 129.

FIG. 4 shows a configuration example of a signal transmitted from the S2 modulator 120 in a time synchronization system including a time series data collection / analysis support system according to an embodiment of the present invention. As shown in FIG. 4, in the S2 modulator 120, transmission RF signals 411 to 413 are generated in synchronization with the timing signals (1PPS signals) 401 to 403 that are periodically output. Typically, the start position of the SYNC words 4111, 4121, 4131 included in each of the transmission RF signals 411 to 413 and the rise (or fall) of the timing signals 401 to 403 are matched. By adopting such a configuration, the timing signal can be reproduced in addition to the time information in the S2 demodulator 210 of the transmission unit 200. That is, the transmission RF signals 411 to 413 include time information 4112, 4122, 4132 in addition to the SYNC words 4111, 4121, 4131, and the transmission RF signal including the SYNC words is the time when the timing signal is output. Is sent on the wiring with reference to.

By adopting the circuit configuration as described above, it is possible to generate a transmission RF signal including an input signal from the GNSS receiver 110.

FIG. 5 shows an example of a circuit configuration of the S2 demodulator 210 in a time synchronization system including a time series data collection / analysis support system according to an embodiment of the present invention.

In one embodiment, the S2 demodulator 210 demodulates the transmitted RF signal transmitted via the joint hearing system and / or the CATV network to extract the data contained in the transmitted RF signal.

In the time synchronization system according to the embodiment of the present invention, the S2 demodulator 210 transmits a transmission RF signal depending on the transmission path from the S2 modulator 120 of the reference unit 100 to the S2 demodulator 210 of the transmission unit 200. It has a function to correct the delay (delay correction function). The correction amount (correction time) of the transmission delay may be a fixed value measured in advance, or may be a variable value that dynamically changes according to the state of the transmission path.

When an actual joint listening system and CATV network are assumed as transmission paths, the transmission RF signal is unidirectional and the transmission RF signal occupies the frequency of a specific free channel, so measurement is performed in advance. It is sufficient to use the constant transmission delay. However, an automatic delay time correction function as described later may be implemented.

As shown in FIG. 5, the S2 demodulator 210 changes the transmission RF signal received from the S2 modulator 120 into an IF signal, demodulates it into a digital signal, and detects the SYNC word contained in the demodulated digital signal. By doing so, the demodulated data synchronized with the timing signal (1PPS signal) is output. Specifically, the S2 demodulator 210 includes a down-convert circuit 212, a demodulator circuit 214, a carrier oscillator 217, and a system oscillator 218.

The down-conversion circuit 212 down-converts the received transmission RF signal with the carrier wave from the carrier oscillator 217 and outputs it as an IF signal (I component and Q component). The carrier oscillator 217 generates a carrier wave according to a clock obtained by dividing the loop-controlled system clock from the system oscillator 218. Specifically, the down-convert circuit 212 includes a variable amplifier 2121, a mixer 2122, amplifiers 2123, 2125, and a low-pass filter 2124, 2126.

The amplitude of the transmitted RF signal is adjusted by the variable amplifier 2121, and then the carrier wave from the carrier oscillator 125 is multiplied by the mixer 2122 to output the I component and the Q component as IF signals. The I component of the transmission RF signal output from the mixer 2122 is output to the demodulation circuit 214 via the amplifier 2123 and the low-pass filter 2124. Similarly, the Q component of the transmission RF signal output from the mixer 2122 is output to the demodulation circuit 214 via the amplifier 2125 and the low-pass filter 2126.

The demodulation circuit 214 demodulates the IF signal output from the down-conversion circuit 212 and outputs demodulated data. Specifically, the demodulator circuit 214 includes a digital-to-analog converter 2141, 142, a phase rotator 2143, a low-pass filter 2144, 2145, a mixer 2146, a bit synchronization unit 2147, a SYNC detection unit 2148, and data extraction. Unit 2149, serial / parallel conversion unit 2150, delay correction amount holding unit 2151, synchronization adjustment unit 2152, phase comparison unit 2153, frequency divider 2154, 2159, loop filters 2156, 2157, and digital-to-analog conversion. It includes a vessel 2158 and an amplifier 2160. Note that all or part of the demodulation circuit 214 may be digitally processed using FPGA.

The I component and Q component from the down-convert circuit 212 are converted into digital signals by the digital-to-analog converters 2141 and 2142, respectively, and then output to the phase rotator 2143. The I component and the Q component are BPSK demodulated by the phase shifter 2143, and the respective demodulation results are output to the mixer 2146. Further, the demodulation result of the I component is input to the bit synchronization unit 2147 and demodulated into a bit string. The SYNC detection unit 2148 generates a timing signal (1PPS signal) by detecting the SYNC word included in the bit string output from the bit synchronization unit 2147. The timing signal from the SYNC detection unit 2148 is output to the synchronization adjustment unit 2152. In addition, the data extraction unit 2149 extracts the data following the SYNC word detected by the SYNC detection unit 2148. Finally, the data extracted by the data extraction unit 2149 is formatted by the serial / parallel conversion unit 2150 into a predetermined data format and output as demodulated data. The demodulated data is given to the S3 transmitter 220. The serial / parallel converter 2150 can be realized by using a circuit such as a UART (Universal Asynchronous Receiver Transmitter), for example.
When the IMES-TAS signal includes a secret code, an interface for securely outputting the secret code included in the demodulation result of the transmission RF signal may be further implemented.

The mixer 2146 constitutes a part of a loop called a costus loop, and the output from the mixer 2146 is fed back to the system oscillator 218 via the loop filter 2157 and the digital-to-analog converter 2158. The system oscillator 218 is an oscillator that provides the system clock of the demodulation circuit 214. For example, it is assumed that the system oscillator 218 generates a clock of 100 MHz, which is a frequency obtained by multiplying the carrier wave (for example, 10 MHz) of the transmission RF signal by 10. The system oscillator 218 changes the transmission frequency in response to the feedback signal from the digital-to-analog converter 2158. As the system oscillator 218, a voltage-controlled crystal oscillator (VCXO: Voltage Controlled Crystal Oscillator) or a temperature-compensated crystal oscillator (TCXO: Temperature Compensated Crystal Oscillator) may be adopted.

The system clock from the system oscillator 218 is divided by the frequency divider 2159 to 1/10 and reproduced as a carrier wave of the received transmission RF signal. In this way, the carrier wave (10 MHz) of the transmission RF signal is output by demodulating the BPSK-modulated signal in the Costas loop and reproducing it in the carrier reproduction loop.

The SYNC detection unit 2148 reproduces the timing signal (1PPS signal) by detecting the SYNC word included in the transmission RF signal. The timing signal from the SYNC detection unit 2148 is phase-compared with the timing signal (1 Hz) generated inside the demodulation circuit 214 by the system oscillator 218 after the transmission delay is corrected by the synchronization adjustment unit 2152. That is, the timing signal from the synchronization adjustment unit 2152 and the timing signal obtained by dividing the system clock by the frequency divider 2154 are input to the phase comparison unit 2153. The phase difference detected by the phase comparison unit 2153 is fed back to the phase rotator 2143 via the loop filter 2156. That is, by these loop operations, the phase input to the Costas loop is appropriately rotated, and the timing signal (1PPS signal) and the system clock can be synchronized. Then, for example, the timing signal obtained by dividing the system clock by the frequency divider 2154 is output as a 1PPS signal. At this time, the timing signal (1PPS signal) is output before the timing when the SYNC word included in the transmission RF signal is detected in consideration of the transmission delay. That is, the output of the timing signal (1PPS signal) is performed before the extraction of the data following the SYNC word.

As described above, the S2 demodulator 210 is connected to any branch of the wiring branched into a plurality of branches, and functions as a demodulator that demodulates the modulation signal (transmission RF signal) propagating on the wiring. As shown in FIGS. 1 and 5, basically, a plurality of S2 demodulators 210 are installed for one reference unit 100.

The function of correcting the transmission delay of the transmission RF signal (delay correction function) adopted in the time synchronization system according to the embodiment of the present invention is mainly realized by the delay correction amount holding unit 2151 and the synchronization adjustment unit 2152. By setting a fixed delay time measured in advance in the delay correction amount holding unit 2151, the timing signal (1PPS signal) is corrected by the set time, thereby reducing the transmission delay of the transmission RF signal. Can be corrected. More specifically, when the S2 demodulator 210 detects the SYNC word included in the modulated signal (transmission RF signal) propagating on the wiring, the S2 demodulator 210 outputs the information following the detected SYNC word as demodulated data, and also outputs the information following the detected SYNC word as demodulated data. A timing signal (1PPS signal) is output with reference to a time point preceding a predetermined correction time from the time when the SYNC word is detected. By applying such a delay correction function, the output of the timing signal (1PPS signal) and the output of the demodulated data will be different, but since the 1PPS signal has high periodic accuracy, its periodicity should be used. Therefore, it does not pose a problem when generating and transmitting the IMES-TAS signal.

The delay correction function in the S2 demodulator 210 according to the embodiment of the present invention synchronizes the transmission RF signal processed by the transmission unit 200 connected to the same time synchronization system with an accuracy of ± 500 ns (target value). Can be maintained in the same state.

By adopting the above configuration, the S2 demodulator 210 connected to the terminal 18 in each house performs demodulation processing and synchronous tracking processing on the transmitted RF signal to obtain position information, time information, frequency signal, and the like. Information and timing signals (1PPS signals) can be output.

FIG. 6 shows the system configuration of the iPNT transmitter (IMES-TS transmitter, S3 transmitter 220) in the time synchronization system including the time series data collection / analysis support system according to the embodiment of the present invention.

In one embodiment of the present invention, the IMES-TAS signal generation process and the transmission process in the S3 transmitter 220 of the transmission unit 200 will be described. The S3 transmitter 220 generates and transmits an IMES-TAS signal based on the demodulated data and the timing signal from the S2 demodulator 210. For example, when the S3 receiver 320 of the base station 300 supports GPS as GNSS, the RF frequency of the IMES-TAS signal is set to 1.57542 GHz. However, the RF frequency may be changed as appropriate according to the restrictions on radio wave administration at the destination where this system is operated. Further, when it is implemented as a system compatible with other positioning satellite systems other than GPS, one or a plurality of RF frequencies may be adopted according to the target positioning satellite system.

As shown in FIG. 6, the S3 transmitter 220 includes a digital processing block 221, an EEPROM (Electronically Erasable and Programmable Read Only Memory) 222, an analog processing block 223, an antenna 224, a digital input / output interface 225, and timing. It includes an interface 226, an oscillator 227, an analog processing block 223 electrically connected to the digital processing block 221 and a power supply 228.

The digital processing block 221 includes a CPU (Central Processing Unit) 2212 and a RAM (Random Access Memory) 2214. The EEPROM 222, the digital input / output interface 225, the timing interface 226, and the oscillator 227 are electrically connected to the digital processing block 221. Further, the antenna 224 is electrically connected to the analog processing block 223.

The EEPROM 222 stores data necessary for generating a program executed by the CPU 2212 of the digital processing block 221, an IMES signal, and an IMES-TAS signal. The program and necessary data stored in the EEPROM 222 are read out when the S3 transmitter 220 is activated and transferred to the RAM 2214. The EEPROM 222 can further store data input from the outside of the S3 transmitter 220. The storage device for storing the program and necessary data is not limited to EEPROM 222, and may be at least a storage device capable of storing data non-volatilely.

The digital processing block 221 receives demodulation data (information such as position information, time information, frequency signal, etc.) acquired from the S2 demodulator 210 via the digital input / output interface 225, and from the S2 demodulator 210 via the timing interface 226. The acquired timing signal (1PPS signal) is received to generate data that is a source for generating the IEMS signal and the IEMS-TAS signal. The digital processing block 221 sends the generated data as a bit stream to the analog processing block 223.

The oscillator 227 supplies the digital processing block 221 with a clock that defines the operation of the CPU 2212 or a clock for generating a carrier wave.

The analog processing block 223 uses the bitstream output from the digital processing block 221 to modulate it with a carrier wave of 1.57542 GHz to generate a transmission signal, which is then transmitted to the antenna 224. The signal is transmitted from the antenna 224. In this way, the IMES signal and the IMES-TAS signal are transmitted from the S3 transmitter 220.

The power supply 228 supplies electric power to each part constituting the S3 transmitter 220. As shown in FIG. 6, the power supply 228 may be built in the S3 transmitter 220, or may be in a mode of receiving power supply from the outside.

In the above description, the CPU 2212 is used as the arithmetic processing unit for realizing the processing in the digital processing block 221. However, other arithmetic processing units may be used. Alternatively, the digital processing block 221 may be configured by FPGA.

In FIG. 6, the clock (Clk) is supplied from the digital processing block 221 to the analog processing block 223, but may be supplied directly from the oscillator 227 to the analog processing block 223.
Further, in FIG. 6, the digital processing block 221 and the analog processing block 223 are shown separately, but the present invention is not limited to this, and may be mixed or mounted on one chip. ..

FIG. 7 shows the message structure of the iPNT transmitter (IMES-TS transmitter, S3 transmitter 220) in the time synchronization system including the time series data collection / analysis support system according to the embodiment of the present invention.

As shown in FIG. 7, in addition to the four message types (MT0, MT1, MT3, MT4) defined as known IMES signals, even if the message format 260A (MT7) is adopted for the IMES-TS signal. Good. The message shown in FIG. 7 is an example, and any message format may be used as long as it contains information necessary for time synchronization.

In one embodiment of the invention, the message format 260A includes GPSNav message compatible GPS Week and TOW (Time Of Week), month, day, hour, minute, and second information.

FIG. 8 shows the message structure of the iPNT transmitter (IMES-TAS transmitter, S3 transmitter 220) in the time synchronization system including the time series data collection / analysis support system according to the embodiment of the present invention.

As shown in FIG. 8, in addition to the four message types defined as known IMES signals, the message format 270 may be adopted as the IMES-TAS signal. The message shown in FIG. 8 is an example, and any message format may be used as long as it includes information necessary for time synchronization.

In the IMES-TAS signal message format 270 (MT7) shown in FIG. 8, by introducing the concept of "page", more information can be transmitted while maintaining compatibility with the existing message format. Extends to. That is, for the message format 270, by combining the value of the message type and the value of the page, it is possible to send a message having a number of words exceeding the existing number of words for a message of a specific message type. FIG. 8 shows an example in which the message format 270 may have three pages of 4-word data, but the number of pages is not limited to this, and the number of pages may be expanded to a required number.

FIG. 9 shows a system configuration example of a receiver (iPNT receiver) in a time synchronization system including a time series data collection / analysis support system according to an embodiment of the present invention.

As shown in FIG. 9, the IPNT receiver 900 includes a processor 902, a main memory 904, an output unit 906, an input unit 908, a flash memory 910, and a GNSS module 920 (the iPNT-compatible GNSS receiver 110 in FIG. 1). Includes) and communication port 922. In one embodiment, the communication port 922 includes a serial port 9221 and an Ethernet® port (LAN port) 9222. Further, in the flash memory 910, for example, an OS (Operating System) 912, an API (Application Program Interface) group 914, and an application group 916 are stored. These elements are connected via the internal bus 924.

The processor 902 realizes various functions by expanding the program stored in the flash memory 910 to the main memory 904 and executing the program. The main memory 904 is realized by a volatile memory such as a DRAM (Dynamic Random Access Memory) or a SRAM (Static Random Access Memory).

The output unit 906 includes a device that notifies the user of the result obtained by the arithmetic processing in the processor 902. For example, the output unit 906 includes a display or an indicator for visually notifying the user of information, and in this case, it is realized by using an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, or the like. .. Alternatively, the output unit 906 includes a microphone for aurally notifying the user of information.

The input unit 908 is a device that receives an operation from the user, and is realized by using, for example, a touch panel, a keyboard, a mouse, or the like arranged on the surface of the display.

The flash memory 910 is a non-volatile memory and stores various programs and data. OS912 provides an environment for executing various applications on the IPNT receiver 900. The API group 914 is in charge of the basic processing necessary for executing the processing in the application group 916. The application group 916 includes various user applications and the like.

The GNSS module 920 receives the GNSS signal and acquires the information contained in the received GNSS signal.

FIG. 10 shows a flowchart for explaining an operation flow in the time-series data collection / analysis support system according to the embodiment of the present invention.

In FIG. 10, the sensor 1 and the sensor 2 correspond to the vibration sensor 131 and the IoT sensors 132, 151 to 153 in FIG. 1. In FIG. 10, for convenience of explanation, only two sensors are displayed, but the present invention is not limited to this, and three or more sensors may be provided.

The gateway in FIG. 10 corresponds to the IoTGW 120 in FIG. Further, the analysis server in the figure corresponds to the analysis server 170 in FIG. The analysis server in FIG. 10 operates in cooperation with an application (corresponding to 171 to 173 in FIG. 1) such as a seismic monitor and smart building management (not shown).
Further, in FIG. 10, t1 to t11 show a time-series flow, and operations and processes described later are performed over time.

First, at time t1, the raw measurement data is transmitted from the sensor 1 to the gateway (step S1001). Raw measurement data is transmitted from the sensor 1 to the gateway at times t4, t7, and t10 as described later (step S1006, step S1011, step S1016), but these transmission timings are not synchronized (step S1006, step S1011, step S1016). Asynchronous transmission).

At time t2, the raw measurement data is transmitted from the sensor 2 to the gateway (step S1002). As will be described later, the sensor 2 transmits raw measurement data to the gateway at times t5 and t9 (step S1007, step S1015), but these transmission timings are not synchronized (asynchronous transmission).

In FIG. 10, the gateway aggregates the raw measurement data sent from the sensor 1 and the sensor 2 and stamps the time information periodically / irregularly (step S1003, step S1008, step S1012, step S1017). Then, the raw measurement data (group) with the time information stamped at the gateway is transmitted to the analysis server as time unit set data (step S1004, step S1009, step S1013, step S1018).
In one embodiment of the present invention, engraving the time information means performing a process of adding the time information to each aggregated raw measurement data to form one data set.
Further, in one embodiment of the present invention, each raw measurement data can include position information of each sensor in addition to the measured value data (in this case, does each sensor store its own position information? Alternatively, even if each sensor itself does not store the position information, the position information of the gateway can be typically used to set the position of each sensor.)

Next, at time t3, the gateway transmits the aggregated raw measurement data (group) engraved with the time information to the analysis server as time unit set data (step S1004).

The analysis server that received the time unit set data in step S1004 stores it in a storage area (not shown) (step S1005). In one embodiment, the stored data is used by an application or the like (not shown) (step S1091).
Here, the data format and the like of the data used by the application and the like will be described with reference to FIG.

FIG. 12 shows an example of a data format of data generated in the time series data collection / analysis support system according to the embodiment of the present invention. This data format is the data format handled by the analysis server (170 in FIG. 1) according to the embodiment of the present invention.

As shown in FIG. 12, the data 1200 includes time stamp information (time information) 1201 and content data 1202. The type stamp information 1201 is time information stamped on the raw measurement data by the gateway. In one embodiment, the date and hour, minute, and second data formats are adopted.

本発明の一実施形態においては、上記センサＩＤ、計測値、及びセンサ位置情報を必須とし、付加的にセンサの位置情報を含めることもできる（その場合は、各センサが自身の位置情報を記憶している）。
あるいは、センサの位置情報に関し、ＧＷの位置情報が代表的に利用されて、各センサの位置情報とされてもよい。 Further, the content data 1202 stores a column (one or more columns) of numerical values of each raw measurement data. In one embodiment of the present invention, the content data 1302 includes data items as shown in the table below.

In one embodiment of the present invention, the sensor ID, the measured value, and the sensor position information are indispensable, and the position information of the sensor can be additionally included (in that case, each sensor stores its own position information). doing).
Alternatively, regarding the position information of the sensors, the position information of the GW may be typically used and used as the position information of each sensor.

Returning to FIG. 10, focusing on the time information marking at the gateway (step S1008), the time information marking target data here is transmitted from the sensor 2 at the time t5 and the raw measurement data transmitted from the sensor 1 at the time t4. It is the raw measurement data that has been collected. The raw measurement data (group) engraved with the time information in the same step is transmitted to the analysis server as time unit set data (step S1009). The analysis server that received the time unit set data in step S1009 stores it in a storage area (not shown) (step S1010). In one embodiment, the stored data is used by an application (not shown) or the like (step S1092, step S1093).

Next, when focusing on the time information marking (step S1012) at the gateway, processing different from that of step S1003 and step S1008 is performed. That is, the raw measurement data aggregated in step S1012 is only the data transmitted from the sensor 1. As described above, in one embodiment of the present invention, it is not always necessary to wait for the arrival of raw measurement data from all the sensors at each time stamp timing. The raw measurement data (here, the arrival data from the sensor 2) that did not arrive in time for the predetermined time stamp timing due to individual circumstances (fluctuations in the operation timing) can be truncated.

The raw measurement data (group) engraved with the time information in step S1012 is transmitted to the analysis server as time unit set data (step S1013). The analysis server that received the time unit set data in step S1013 stores it in a storage area (not shown) (step S1014). In one embodiment, the stored data is used by an application or the like (not shown) (step S1094).

Next, when focusing on the time information marking (step S1017) at the gateway, processing different from that of step S1003, step S1008, and step S1012 is performed. That is, the raw measurement data aggregated in step S1018 is the data transmitted from the sensor 1 and the sensor 2, but the order of arrival of the data is different from the conventional one. As described above, in one embodiment of the present invention, the order of arrival of raw measurement data from all sensors does not necessarily matter.

The raw measurement data (group) with the time information stamped in step S1017 is transmitted to the analysis server as time unit set data (step S1018). The analysis server that received the time unit set data in step S1018 stores it in a storage area (not shown) (step S1019). In one embodiment, the stored data is used by an application (not shown) or the like (not shown in FIG. 10).

FIG. 11 shows a detailed flow of processing in the time series data collection / analysis support system according to the embodiment of the present invention. The flow shown in FIG. 11 is premised on the processing in the time series data collection / analysis support system shown in FIG.

When the process is started in step S1101 of FIG. 11, the process proceeds to step S1102, and the iPNT signal is received by the iPNT receiver 110 (step S1102). Next, the process proceeds to step S1103, and the iPNT receiver 110 generates a tuning signal for each 1PPS (for example, a clock of 10 MHz). In one embodiment of the invention, the generated signal is continuously processed in the iPNT receiver 110. Also, in one embodiment, this signal may be synchronized with outdoor GNSS.

Next, the process proceeds to step S1104, and in one embodiment, NMEA message generation processing is performed in the iPNT110 (NMEA message is a standard defined by the National Marine Electronics Association, and is a receiver and a navigation device. It is a protocol used for communication of.). Here, time information can be retrieved. Next, the process proceeds to step S1105, and in one embodiment, the NMEA-INPT message generation process is performed in the iPNT 110 (the NMEA-iPNT message is a communication protocol in which information about the iPNT is added to the NMEA message). Here, time + position + message information can be retrieved.
In one embodiment of the invention, this information is transmitted to the IoTGW 120.

Next, the process proceeds to step S1106, and data collection from each sensor is performed in the IoTGW 120. As an example, there are steps S1001, S1002, S1006, S1007, S1011, S1015, and S1016 in FIG.
Then, the process proceeds to step S1107, and the time information is stamped on the data (group) collected in the IoTGW 120. In one embodiment, the time information adopted in the marking process here is the data reception time in the IoTGW 120. As an example, these marking processes are steps 1003, S1008, S1012, and S1017 in FIG.

Then, the process proceeds to step S1108, and the engraved data (group) is transmitted from the IoTGW 120 to the analysis server 170. As an example, these transmission processes are steps 1004, S1009, S1013, and S1018 in FIG.

As described above, the embodiments of the present invention have been specifically described from various aspects with reference to the drawings, but the scope of claims, the specification, the abstract, all the technical elements described in the drawings, and The method or processing step can be a component or component stage of a system and program according to the present invention by any combination except those elements and / or combinations in which at least a part of the steps is mutually exclusive.

Further, the present invention is not limited or limited to any specific detailed description of any of the above-described embodiments. Furthermore, the technical scope of the present invention is not limited to the above description, but its extension is specified by the description of the scope of claims, and substitutions or modifications equivalent to the scope of claims of the present invention are also made in the present invention. It is a technical scope.

100 Time series data collection / analysis support system 101 iPNT transmitter 110 iPNT receiver 120 IoT gateway (GW)
131 Vibration sensor 132 IoT sensor 141a, 141b LPW
142a, 142b BT
143a, 143b WiFi
151, 152, 153 IoT sensor 160 network (dedicated line, local network, internet, etc.)
170 Analysis Server 199 Internet

Claims (4)

There is a system that provides time information and location information from the iPNT to an IoT terminal that cannot receive GNSS signals, collects data transmitted from the IoT terminal as time-series data, and supports analysis of the time-series data. ,
It manages the time information and location information from the iPNT,
A system characterized in that the time information and the position information of the managed iPNT are provided to the parent terminal of the wireless communication terminals synchronized with the system. Time information and position information from the iPNT are given to the data received from the IoT terminal that cannot receive the GNSS signal, at least the data to which the time information is given is collected as time-series data, and the time-series data is analyzed. It ’s a system to support
Manages time information and location information from the iPNT,
Data from the IoT terminal is aggregated and
A system characterized in that the time information and the position information of the iPNT are stamped on the aggregated data. On a system that provides time information and position information from an iPNT to an IoT terminal that cannot receive a GNSS signal, collects data transmitted from the IoT terminal as time-series data, and supports analysis of the time-series data. When there is a running program and it is executed on the system
The step of managing the time information and the position information from the iPNT, and
A program characterized by executing a step of causing a parent terminal of a wireless communication terminal synchronized with the system to provide time information and position information of the managed iPNT. Time information and position information from the iPNT are given to the data received from the IoT terminal that cannot receive the GNSS signal, at least the data to which the time information is given is collected as time-series data, and the time-series data is analyzed. When a program runs on a system to assist and is executed on the system
The step of managing the time information and location information from the iPNT, and
The step of aggregating the data from the IoT terminal and
A program characterized by executing a step of imprinting the time information and position information of the iPNT on the aggregated data.

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