JPS5844597A - Event data collector for moving data - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention transmits event data on a moving vehicle to the ground together with the time of occurrence, and calibrates the occurrence time information on the ground, thereby reducing the amount of $ generated on each moving vehicle. The present invention relates to a mobile object occurrence event data collection device that is capable of collecting and processing NL data together with accurate occurrence time information.

Conventionally, there was a device of this type shown in figure s11.
In the figure, ■ is a mobile object, (2) is a transmitter/receiver 46815 that transmits and receives mobile object event information, and @ is this transmitter/receiver (2).
(c) is a clock unit that generates time information, (2) is a terminal unit, - is a power supply unit, and the above circuit elements (
The vehicle-mounted transmitter/receiver (2) is comprised of the vehicle. (
31 is a sensor that detects an event that occurs, (4) is an on-vehicle antenna for transmitting and receiving between the vehicle and the ground, (5) is an on-road antenna, and Q is a transmitting and receiving unit that transmits and receives mobile body event information on the ground. - is a control unit that controls 1 receiving unit all, - is a terminal unit, - is a power supply unit, and the above-mentioned circuit elements 1 to N constitute a road transceiver (6), and this road transceiver (6)
Collects information on events occurring in mobile objects and calibrates the time of the clock section (2) of the on-vehicle transmitter/receiver (2).VQ is the CPU
@15% (7th is the control part, v-saki is the clock part, IF4 is the terminal part, decoy is the power supply part, and the above circuit elements g1 to 4 collect the mobile information collected by the roadside receiver (6) It constitutes a central processing unit ij 171 that performs arithmetic processing. Also, (8) is a transmission line between this central processing unit IIi@f71 and the road transmitter/receiver (61).

Next, the operation will be explained.

This device stores events that occur on a moving body (υ) along with the time of occurrence using a clock mounted on the vehicle, and transmits and receives this on-vehicle data on the ground. 81116 is transmitted, mobile information is collected by the roadside transceiver (6), and sent to the central processing unit through the transmission line (8).
(It is a device that collects data at 71, i.e., a mobile object (1)
The event that occurs above is detected by the power on/off information of the sensor (3) or other onboard equipment (not shown), and is sent to the on-vehicle transceiver (terminal section of 21). The data is further sent to a part of the upper part of the car, and the clock part (2
) is stored together with the event occurrence time (absolute time).

Event data including this time information is transmitted and received by the FA5cu.
#! is input to the on-vehicle antenna (4) and transmitted and received via the roadside antenna (5) of the roadside transmitter/receiver +61 installed on the ground. Via A311.

It is sent to the control section, and then from the terminal section to the transmission port! (8) and is transmitted to the terminal section G of the central processing unit (7).

Next, the above-mentioned data is processed by the control unit and CPU unit of the central processing unit (7), and event data that occurs on the moving mountain is collected and processed by the central processing unit (7).

Conventional mobile object occurrence event data collection devices are configured as described above, so when an in-vehicle transceiver is fixedly installed on a moving object, it is necessary to calibrate the time of the clock of the in-vehicle transceiver. The clock must be calibrated by a human, which can lead to errors in time calibration and complications when setting the clock.Also, when there are multiple moving objects, the absolute time when recording events on each moving object may be incorrect. Accurate ° for each moving object
There were drawbacks such as the inability to collect event data and the inability to manage the entire moving body with high precision.This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is Roadside transceivers are placed at moving object detection points set up at specific locations, and the elapsed time from the occurrence of an event on a moving moving object to the next occurrence, the elapsed time from the time of event occurrence to the detection point, Alternatively, the passing time of a moving object from one detection point to the next detection point is measured and stored as relative time by the clock and control section of the on-vehicle transmitter/receiver 4R4M, and then the occurrence event data collected at the detection point on the ground is recorded. The relative time of each event occurring in a moving object is calibrated to absolute time by the clock section of the roadside transceiver, and in order to further calibrate the roadside transceiver's clock, the central processing unit periodically sends absolute time information to the roadside transceiver. By transmitting through a transmission line,
It is an object of the present invention to provide a mobile body occurrence event data collection device that can accurately calibrate the time of occurrence data of a mobile body and perform accurate data collection processing.

An embodiment of the present invention will be described below with reference to the drawings. Second
In the figure, the same reference numerals as in FIG. 1 indicate the same things as in FIG. It has a clock section that calibrates to absolute time.The clock section σteng of the central processing unit (7) of the Mayu Honryo example periodically transmits absolute time information to the roadside transmitter/receiver 163, and calibrates the clock to absolute time. The absolute time of each unit is calibrated regularly.

Next, the operation of this device will be explained using FIG.

FIG. 3 is an explanatory diagram of the operation of this device, where A is the moving direction of the moving object, 81, Bx, and Bs are the event occurrence points on the vehicle, and CI
, CI is roadside transceiver (61 installed detection points).

tt-ti is the relative time stored on the vehicle, and TI and Tz are the calibrated absolute times on the ground, that is, the absolute times obtained by the clock section of the on-road transceiver (6).

In this embodiment, when recording an event occurring on a moving object,
The on-vehicle transmitter/receiver (2) does not store absolute time, but stores relative time f'ti3.

In other words, for a moving object, the elapsed time from the time an event occurs to the time of the next event, the elapsed time between the event occurrence and the time the moving object passes a detection point, or the elapsed time from one detection point to the next detection point is expressed as relative time. measure. This on-vehicle event data is placed at key points and received by Tomoyokochi Point's on-road transmission/reception 4116).Next, among the event data, occurrence time information based on relative time is detected on the ground.
The clock section of the on-road transmission/reception II 161 is calibrated to absolute time.

Then, the on-road transceiver (6) calibrates the relative time of this 7 occurrence rate data to absolute time based on the time when the moving object was detected, and uses it as the reference for the relative time stored on the desk. The clock function of the on-vehicle transmission/reception @ f21 of the mobile object is set to the initial state through communication between the ground and on-vehicle.

Now, in Fig. 2, J# generated on the moving object (1)
The house is detected by the 11#l on/off information etc. of the sensor (3) or other tower-mounted equipment (not shown), and is detected by the on-vehicle transmitter/receiver (
2) is sent to the terminal section (goods). This generated J# event data is further sent to the control unit @. At this time, the clock part (2)
As shown in Figure 43, the time information recorded in
Elapsed time El between the point of occurrence of one event and the point of detection.

14, or the elapsed time t from one detection point to the next detection point
It is relative time of 8 mag. Such occurrence event data is transmitted to the ground from the tabletop antenna (4) via the control IL transmitter/receiver (company). On the other hand, the on-road transmitter/receiver m 163 placed at the detection point on the ground is calibrated with absolute time as well as the soft 1 hit T and C1 customary Bike brother Wang Jisho, as the moving object (1) passes the detection point early.・In addition, the on-road transmitter/receiver (6) at the detection point transmits and receives a signal to the clock section of 121 (2 stages, rounded as a reference when calculating relative time) and sets this as the initial state. Also, as mentioned above, the clock section of the road transmitter/receiver +61 is connected to the central processing unit (7).
It is calibrated with the absolute time periodically transmitted from the clock unit CI:4.

In the above embodiment, the clock section of the roadside transmitter/receiver is periodically calibrated to the time by the central processing unit, but the event data of the mobile object may deviate slightly from the detection time on the ground and be calibrated to the absolute time. In cases where the transmission line between the roadside transceiver and the central processing unit is a high-speed data line and time errors during collection are not a problem, the central processing unit can be used instead of the roadside transceiver to calibrate the time. A similar effect can be obtained by performing absolute time calibration.

In addition, in the above embodiment, the time is calibrated and the event data is collected at the detection point, but the present invention can be applied when there is no detection point at all during the movement, for example, when the vehicle is on the This also applies to the case where you record all the events that occur during the train, and when you return to the garage after the trip, send all the records together from the desk to the ground, and finally calibrate with absolute time on the ground. It has the same effect as the above embodiment. That is.

The clock starts operating when the in-vehicle transmitter/receiver is powered on, and the data for each event that occurs while moving and the elapsed time between events (
Relative time) is cumulatively recorded on the vehicle, and even if there is no detection point on the way, all data is output to the ground together with the elapsed time since the last event when the train returns to the garage after the end of the trip. This is a case where the relative time of all 41 event data is calibrated with absolute time using the detected time as a reference by a device that has both the function of a road j transmitter and the function of a central processing unit.

As described above, according to the present invention, when transmitting event data of a mobile object to the ground, the time information of the event data is stored in the relative time between event occurrences, and sent to key points on the ground. A detection point, that is, a roadside transceiver, is provided, and the relative time information of event data on the vehicle is calibrated to absolute time information by this roadside transceiver. Since there is no need for Iruma to perform calibration, there are no setting errors or errors associated with human operations, and the information transmitted between the on-board vehicle and the ground does not include absolute time information and is relative. Since only the time is included, the amount of transmission is small, and it can be sent to the desktop in a short time.

This has the effect of completing communication between the ground.

As mentioned above, by calibrating the relative time measured on the moving object to absolute time using the on-road transceiver, and periodically calibrating the hour hand of the on-road transceiver using the central processing unit, multiple Place the clock on each side of the moving body and place it in the center.
Compared to the method of transmitting absolute time information, this method has the effect of allowing event data to be collected with higher time precision.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional mobile object event data collection device, 's2 is a block diagram showing a mobile object event data collection device according to an embodiment of the present invention, and FIG. 3 is a block diagram showing a mobile object event data collection device according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of the operation of this device showing time, absolute time on the ground, etc. (2)... Vehicle-mounted transceiver, (6)... On-road transceiver, (7J... Central processing unit. The same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) An in-vehicle transmitter/receiver that transmits event data that occurs on a mobile object and occurrence time information based on its relative time, and receives the event data and its occurrence time information and calibrates the relative time of the occurrence time information to absolute time. a roadside transceiver,
A mobile object occurrence event data collection device characterized by comprising a central processing unit that collects and processes the ** data received by the on-road transceiver and absolute time occurrence time information obtained by calibrating with the on-road transceiver. .