KR100999559B1 - Method for controlling function of the container security device - Google Patents

Abstract

The present invention provides a low power sensing function and an active alert function of a container security device (CSD). The low power sensing function includes adjusting the number of times per hour by adjusting the period according to the change amount of the sensing data by comparing with the latest sensing data when the sensing is repeated a predetermined number of times, and the active alerting function includes a container. When the CSD mounted in the detection of a dangerous situation, even if there is no command from the CSD reader, it comprises the step of repeatedly transmitting a warning message for the dangerous situation.

Container Security Device, CSD, Low Power Sensing, Periodic Control, Active Alarm

Description

Method for controlling function of the container security device}

The present invention relates to a container security device (CSD), specifically, to enable low-power operation by adjusting the sensing period according to the container state, and actively transmits the dangerous situation to the CSD leader about the dangerous situation of the container. The present invention relates to a method for controlling the operation of a container security device that enables effective container security.

Safety in the freight industry is very important. Freight forwarding companies and their customers are constantly concerned about the illegal removal of goods from transport containers used to store and transport cargo and shipping containers, railroad cars, trailers or products.

Freight forwarders and government agencies also monitor banned or harmful substances or devices, or illegal migrants, such as drugs or weapons of mass destruction, which are illegally brought into transport containers.

As a result, freight forwarders and government agencies can track locks, plastic and metal loop seals and cable seals, bolt seals, safety tapes, and transport containers in an effort to prevent illegal access to transport containers. Container security devices such as safety tags and memory buttons, and temperature monitors.

Cargo transportation using such containers is carried out through several stages such as cargo loading, trucking, gate-in, loading, sailing, unloading, gate-out, trucking, and unloading.

Mechanism for monitoring the safety of the container and its contents has emerged as an important issue in the cargo transportation process using such containers.

The container security device includes a function of reporting the state of the container to the CSD reader. The state of the container may include various data such as temperature and humidity.

The CSD periodically senses various kinds of status information, which means that the battery is periodically consumed even if there is no change in data. If the sensor power consumption is high, the battery consumption is severe.

In addition, if the CSD is frequently sensed, the amount of time that the CSD is awake is increased, thereby reducing the time to perform the low power operation. Therefore, if the sensed data is repeated, it is necessary to optimize the power consumption by reducing the sensing of the CSD.

When the CSD follows the standard specification of the CSD, the CSD reader does not report the status of the container until it sends a command. Even if a dangerous situation occurs, the CSD cannot notify the situation unless the reader sends a status check command.

If the reader's status check is delayed, this may eventually develop into a large risk situation, and thus, it is necessary to actively inform the CSD reader of the container status when a risk situation occurs in order to compensate for the problems caused by the implementation of these basic functions.

The present invention is to solve the problems of the container security device of the prior art, and an object thereof is to provide a method for controlling the operation of the container security device to enable effective container security.

An object of the present invention is to provide a method for controlling the operation of a container security device in which a CSD can reduce unnecessary periodic battery consumption by a meaningless sensing by applying a low power sensing function.

In addition, an object of the present invention is to apply a low power sensing function to reduce the time that the CSD is in the active mode and to operate in a low power mode to efficiently manage battery consumption.

The present invention provides a method for controlling the operation of a container security device that enables effective container security by applying an active alert function, which enables the CSD to actively notify the CSD reader of a dangerous situation when a dangerous situation occurs in the container. The purpose is.

In addition, the present invention, by applying the active alarm function, a plurality of CSD is present in a dense, multi-hop communication method when the distance between the CSD and the CSD reader of the container where the dangerous situation is not directly communicated, The goal is to enable effective container security by enabling alert messages to be sent to CSD readers at high speed.

In accordance with an aspect of the present invention, there is provided a method of controlling an operation of a container security device, the method including: measuring, by a container security device, a state of a container periodically, the change in state of the container security device being smaller than a predetermined threshold; And reducing the number of sensing times per hour by increasing a sensing period; reducing the sensing period to a previous sensing period when the amount of change is greater than a threshold so as to be sensitive to changes in sensing data.

According to another aspect of the present invention, there is provided a method of controlling an operation of a container security device, the method comprising: measuring, by a container security device, a state of a container periodically, when the amount of change of the sensing data is smaller than a predetermined threshold; Reducing the number of sensing times per hour by increasing the sensing period; reducing the sensing period to a previous sensing period if the amount of change is greater than the threshold, thereby making the sensor sensitive to changes in the sensing data; If it is determined that the amount of change in the sensing data is a container dangerous situation, the warning message is repeatedly transmitted to the dangerous situation even if there is no command from the leader.

While the container security device repeats sensing at a predetermined period, when the change amount between the most recent R times previous sensing data and the current sensing data is smaller than a predetermined value, the period is increased by N times and the number of sensing repetitions per cycle is also increased by N times. It is characterized in that to reduce the number of sensing.

While the container security device repeats sensing at a predetermined period, when the change amount between the most recent R times previous sensing data and the current sensing data is larger than a predetermined value, the period is reduced to 1 / N and the number of sensing repetitions per cycle is also 1. It is characterized by increasing the number of sensing by reducing to / N.

The warning message may include a multi-hop count, a message transmission path, a dangerous situation occurrence time, and a dangerous situation occurrence container ID.

If it is determined that the container security device is in a container dangerous situation, the multi-hop count of the warning message is set to 1, a dangerous situation occurrence CSD ID is added to the message transmission path, a dangerous situation occurrence time, a dangerous situation occurrence container ID. Including a warning message characterized in that the transmission to the surrounding.

The other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device increase the number of multi-hops included in the warning message by one, include the ID of the CSD in the message transmission path, and multiply the warning message. It is characterized by transmitting around the hop.

In addition, other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device do not transmit the corresponding warning message when the ID of the CSD is included in the message transmission path included in the warning message. It features.

The other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device transmit the warning message to the surroundings when the number of multi-hops included in the warning message does not exceed N times. If the repeated transmission does not exceed M times, a warning message may be transmitted to the surroundings.

The other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device transmit the warning message to the surroundings when the dangerous situation occurrence time included in the warning message does not differ by more than T from the received CSD time. Characterized in that.

Such an operation control method of the container security device according to the present invention has the following effects.

First, the low power sensing function can significantly reduce the number of unnecessary sensing periods by increasing the sensing period in an area where there is little change in data.

Secondly, by reducing the number of unnecessary sensing, the container security device can operate in a low power mode by reducing the time in the active mode.

Third, if a change in the sensing period is widened, if the state change is found, the cycle is shortened immediately to respond to the change in the sensing data.

Fourth, by limiting the upper and lower limits in the cycle to prevent excessively wide intervals, or sensing too often cycles.

Fifth, when a dangerous situation occurs, even if there is no command from the leader, a warning message is actively sent to the leader so that the manager can respond quickly to the dangerous situation.

Sixth, even when the reader and the CSD are not in direct communication, the multi-hop message transmission can be used to notify a high probability of a dangerous situation in a short time at a long time.

Seventh, timeouts and multi-hop limits can be placed on alert messages to prevent communication failure due to excessive message generation.

Eighth, the ID of the container in which the dangerous situation occurred is included in the warning message so that when the reader receives the warning message, it can quickly find the container in which the dangerous situation occurred.

Hereinafter, a preferred embodiment of the operation control method of the container security device according to the present invention will be described in detail.

Features and advantages of the operation control method of the container security device according to the present invention will become apparent from the following detailed description of each embodiment.

FIG. 1 is a block diagram illustrating a change cycle algorithm of a low power sensing function and a test frequency, and FIG. 2 is a comparison diagram of measured data of a low power sensing function.

3 is a block diagram illustrating a process of delivering an alert message by a multi-hop method according to the present invention, and FIG. 4 is a flowchart illustrating an operation control process of the container security device according to the present invention.

The present invention is to measure the situation of the container and to respond to the dangerous situation while consuming less power of the container security device.

The low power sensing function adjusts the sensing cycle according to the change of state, thereby preventing the power consumption by insignificantly repeating the sensing periodically, and the active alarm function is dangerous to the CSD leader actively about the dangerous situation of the container. It is a function that communicates the situation so that even if the distance between the CSD and the CSD reader is large, the alert message can be transmitted by multi-hop.

The container security apparatus according to the present invention includes performing a function of periodically sensing data such as temperature or humidity inside the container.

The container security apparatus applying the low power sensing function according to an embodiment of the present invention periodically measures the state of the container while sensing the state of the container, and increases the sensing period when the change amount is less than a predetermined threshold to reduce battery consumption. Reducing the number of sensing times per hour, and if the threshold value is greater than or equal to a threshold, immediately reducing the sensing period to a previous sensing period so as to be sensitive to changes in the sensing data.

In addition, the container security device according to an embodiment of the present invention transmits an alarm message about a dangerous situation to a CSD reader by using an active alert function when a dangerous situation occurs, and when the container security device is at a distance not directly communicating with the reader, And sending a message to a reader via peripheral CSDs in a hop manner.

As shown in FIG. 1, which shows a cycle and inspection frequency change algorithm of the low power sensing function, the container security device to which the low power sensing function is applied measures temperature and humidity.

The container security device senses A times with a period of T, compares the sensing data stored during A times of sensing, increases the period to N × T if there is no change, and also checks the number of inspections in the period of sensing with the period of T. Increase to x A.

If there is no change in the data continuously, repeat this process continuously to increase the period, but do not increase the period beyond the limit period N ⁿ × T to prevent the detection of a situation that occurred within the period too late because it is too long. .

When there is more than a certain change in the sensed data, the cycle is immediately reduced to 1 / N and the number of sensing is also reduced to 1 / N to cope with the change of state. The period and the number of sensing are reduced by 1 / N and each does not decrease below the minimum T and A.

FIG. 2 is a measurement data comparison diagram of a low power sensing function. The container security device to which the low power sensing function is applied stores the most recent R times of data and updates it at every measurement.

At this time, if the state is changed by comparing the N-R th data with the N th data, the period is immediately reduced to 1 / N. Sensing continues if there is no change, and if there is no change during the execution of the number of inspections set in the period, the period is increased.

3 illustrates an alarm message delivery method using a multi-hop method using an active alarm function of a container security device.

The container security device with active alerting senses the surrounding situation, and if data outside the threshold set by the user is measured, it is considered as a dangerous situation and a warning message about the dangerous situation is sent to the reader.

However, the container security device applying the standard is supposed to transmit information about the state of the container only when the CSD reader commands the status report.

The container security device is not always connected to the CSD reader, and the communication distance of the CSD reader is only 30m.

Therefore, in an environment such as a yard or a ship with a large number of container security devices and a small number of CSD readers, the container security device should be able to notify the CSD readers located at a distance about the status of the container.

In the present invention, the container security device to which the active alarm is applied transmits a warning message N times in a period of T, and the message includes a time of occurrence of a dangerous situation, a CSD ID of a dangerous situation, a container ID of a dangerous situation, and a multi-hop count. do.

The neighboring CSDs that receive the warning message of the dangerous CSD are retransmitted only to the message meeting the test condition after checking the factors included in the message as shown in FIG. 3.

When checking the warning message of the CSD, a message that has elapsed a certain time since the time of occurrence of the dangerous situation included in the message is not retransmitted.

And when checking warning message of CSD, message with same ID of CSD where dangerous situation included in message is sent is not sent more than a certain number of times, and message that has passed a certain time since dangerous situation occurrence included in warning message is the same message. Initialize the counter to prevent duplicate transmission.

When checking the warning message of the CSD, a message having more than M multi-hops included in the message is not retransmitted to the periphery.

That is, the warning message includes a multi-hop count, a message transmission path, a dangerous event occurrence time, a dangerous event occurrence container ID, and if the container security device is determined to be a container dangerous situation, the multi-hop count of the warning message is 1. Set to, add the dangerous situation occurrence CSD ID to the message transmission path, and transmit the dangerous situation occurrence time and the dangerous situation occurrence container ID with a warning message.

In addition, other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device increase the number of multihops included in the warning message by one, include the ID of the CSD in the message transmission path, and then multi-hop the warning message. To transfer around.

Here, when the CSD own ID is included in the message transmission path included in the warning message, the corresponding warning message is not transmitted to the surroundings.

The other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device transmit the warning message to the surroundings when the number of multi-hops included in the warning message does not exceed N times. If the repetitive transmission does not exceed M times, a warning message is sent to the surroundings.

The other container security devices in the vicinity of receiving the warning message transmitted by the corresponding container security device transmit the warning message to the surroundings when the dangerous situation occurrence time included in the warning message does not differ by more than T from the received CSD time. .

The user who checks the warning message that reaches the leader through several CSDs can identify the location of the dangerous container based on the time of danger occurrence and the ID of the container where the dangerous situation occurred, and can respond quickly. Will be.

The operation control process of the container security device according to the present invention will be described in detail with reference to FIG. 4.

First, the container security device stores the most recent R times of data and updates and stores it at every measurement (S401).

The N-R th data is compared with the N th data and compared with a preset sensing data change threshold value L (S402).

As a result of the comparison, when the container security device repeats sensing a predetermined number of times, if the amount of change between the most recent R-times sensing data and the current sensing data is more than a predetermined level, it is determined whether the sensing frequency of the container security device is the highest frequency. (S405)

If the sensing frequency of the container security device is not the highest frequency, the sensing cycle is reduced to 1 / N, and the number of sensing repetitions per cycle is also reduced to 1 / N to increase the number of sensing (S406) and to change the sensing frequency change count value. Initialize (S409)

If the sensing frequency of the container security device is the highest frequency, the operation of sensing the container situation and storing the sensing data is repeated according to the sensing frequency determined as the low power mode (S410).

As a result of the comparison, if the amount of change between the most recent R sensing data and the current sensing data is less than or equal to a predetermined level while the container security device repeats sensing a predetermined number of times at a predetermined period, the sensing frequency change count value is increased by one (S403). In operation S404, it is determined whether the sensing frequency change count value is the preset sensing frequency change count maximum value A. FIG.

If the sensing frequency change count is not the maximum value A, the operation of sensing the container situation and storing the sensing data is repeated according to the sensing frequency determined in the low power mode (S410).

If the sensing frequency change count maximum value A is determined, it is determined whether the sensing frequency of the container security device is the lowest frequency (S407).

If the lowest frequency, the sensing of the container situation and the sensing data is stored according to the sensing frequency determined in the low power mode (S410), or the sensing cycle is increased by N times, and the number of sensing repetitions per cycle is also increased by N times. The number of times is reduced (S408), and the sensing frequency change count value is initialized (S409).

The operation control method of the container security device according to the present invention is to apply a low power sensing function that adjusts the sensing period in accordance with the change of state to prevent power consumption by repeating the senselessly periodically.

In addition, it is an active alert function that actively transmits a dangerous situation to a CSD reader about a dangerous situation of a container, so that a warning message can be transmitted by multi-hop even if the distance between the CSD and the CSD reader is far.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

1 is a configuration diagram showing a cycle and test frequency change algorithm of a low power sensing function

2 is a measurement data comparison diagram of a low power sensing function

3 is a block diagram illustrating a process of delivering an alert message by a multi-hop method according to the present invention.

4 is a flowchart illustrating an operation control process of the container security apparatus according to the present invention.

Claims (10)

Measuring, by the container security device, the state change of the container periodically; While the container security device repeats sensing at regular intervals, if the change amount between the most recent R times previous sensing data and the current sensing data is smaller than a predetermined value, the period is increased by N times and the number of sensing repetitions per cycle is also increased by N times. Reducing the number of sensing; When the amount of change between the most recent R times of sensing data and the current sensing data is larger than a predetermined value, decreasing the period to 1 / N and decreasing the number of sensing repetitions per cycle to 1 / N to increase the number of sensing; Operation control method of a container security device comprising a. Measuring, by the container security device, the state change of the container periodically; While the container security device repeats sensing at regular intervals, if the change amount between the most recent R times previous sensing data and the current sensing data is smaller than a predetermined value, the period is increased by N times and the number of sensing repetitions per cycle is also increased by N times. Reducing the number of sensing; When the amount of change between the most recent R times of sensing data and the current sensing data is larger than a predetermined value, decreasing the period to 1 / N and decreasing the number of sensing repetitions per cycle to 1 / N to increase the number of sensing; Including, If it is determined that the amount of change in the sensing data is a container risk situation during these steps, the warning message is repeatedly transmitted actively for the dangerous condition even without a command from the reader. delete delete The method of claim 2, wherein the warning message, A method for controlling the operation of a container security device, comprising a multi-hop count, a message transmission path, a dangerous event occurrence time, and a dangerous event occurrence container ID. The method according to claim 2, wherein if it is determined that the container security device is in a container dangerous situation, the multi-hop count of the warning message is set to 1, a dangerous situation occurrence CSD ID is added to the message transmission path, and a dangerous situation occurrence time, Method for controlling the operation of the container security device, characterized in that the dangerous situation occurrence container ID is transmitted with a warning message. The method of claim 6, wherein the other container security devices in the vicinity of receiving the warning message sent by the container security device, And multiplying the number of multi-hops included in the warning message by one, including the ID of the CSD in the message transmission path, and transmitting the warning message in a multi-hop manner. The method of claim 6 or 7, wherein the other container security devices in the vicinity of receiving the warning message sent by the container security device, If the CSD own ID is included in the message transmission path included in the warning message, the corresponding warning message is not transmitted to the surroundings. The method of claim 6 or 7, wherein the other container security devices in the vicinity of receiving the warning message sent by the container security device, If the number of multi-hops included in the alert message does not exceed N times, the alert message is sent nearby. If the repeated transmission of the same warning message does not exceed M times, the method of controlling the operation of the container security device, characterized in that for transmitting the warning message around. The method of claim 6 or 7, wherein the other container security devices in the vicinity of receiving the warning message sent by the container security device, And transmitting a warning message to the surroundings when the dangerous situation occurrence time included in the warning message does not differ by more than T from the received time of the CSD.

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