JP6828543B2 - Slope monitoring device, slope monitoring method, and slope monitoring program - Google Patents

Description

The present invention relates to a slope monitoring device, a slope monitoring method, and a slope monitoring program. Specifically, in a system in which a large number of wireless terminals distributed in a space, such as a sensor network, communicate with terminals in an area where the wireless does not reach directly by relaying data, the slope is provided by the sensor provided by the wireless terminal. It is related to a system that monitors and detects the occurrence of natural disasters such as landslides.

There is an invention of Patent Document 1 relating to a rockfall / landslide detection system. Patent Document 1 describes a method of notifying a remote management device of a slope condition by using a wireless terminal provided with a semiconductor sensor, a method of reducing power consumption in operating a wireless terminal by battery drive, and a sensor. It is described that a filter is introduced to reduce false positives.

Japanese Unexamined Patent Publication No. 2011-47252

Considering the seriousness of damage caused by natural disasters in recent years, there is a demand for a slope monitoring system to reliably notify a remote management device of the slope condition detected by a wireless terminal while paying attention to the power consumption of the wireless terminal. There is. However, Patent Document 1 does not describe or suggest specific technical contents that satisfy such a demand.

The present invention has been made in view of the above problems, and in the slope monitoring of the slope monitoring device, it is ensured that the monitoring result is remotely notified while paying attention to the power consumption of the slope monitoring device. The purpose.

In order to solve the above problems, the slope monitoring device according to the present invention is a slope monitoring device that monitors the slope with a sensor to detect the occurrence of a natural disaster, and reads the value of the sensor to determine whether or not there is an inclination abnormality. A notification control unit for determining whether or not the data is transmitted and a radio unit for transmitting data at a predetermined periodic notification frequency are provided, and the radio unit provides a confirmation packet for the data to be transmitted when it is determined that there is an inclination abnormality. If it is determined that there is no tilt abnormality , the arrival confirmation and retransmission control are not performed for the data to be transmitted , and a moisture amount sensor that measures the amount of water in the soil is used. The management device that manages a plurality of slope monitoring devices including the slope monitoring device that does not have the water content sensor and another slope monitoring device that has the water content sensor obtains data of water content abnormality in the soil from the other slope monitoring device. Is received, the measurement frequency by the sensor, the measurement accuracy, and the periodic notification frequency by the radio unit are improved according to the setting command received from the management device .

Further, the slope monitoring method according to the present invention is a slope monitoring method in a slope monitoring device that monitors a slope with a sensor to detect the occurrence of a natural disaster, and the slope monitoring device reads out the value of the sensor and tilts. When it is determined that there is an inclination abnormality in the determination step for determining whether or not there is an abnormality and the radio unit that transmits data at a predetermined periodic notification frequency, the data to be transmitted is reached by a confirmation packet. When the confirmation and retransmission control are performed and it is determined that there is no tilt abnormality , the arrival confirmation and the confirmation / retransmission step without the retransmission control are executed for the data to be transmitted, and the amount of water in the soil is contained. A management device that manages a plurality of slope monitoring devices including the slope monitoring device that does not have a water content sensor and another slope monitoring device that has the water content sensor is released from the other slope monitoring device. When the data of the water content abnormality in the inside is received, the measurement frequency by the sensor, the measurement accuracy, and the periodic notification frequency by the radio unit are improved according to the setting command received from the management device. ..

Further, the slope monitoring program according to the present invention reads the value of the sensor from a computer as a slope monitoring device that monitors the slope with a sensor and detects the occurrence of a natural disaster, and determines whether or not there is an inclination abnormality. A slope monitoring program for functioning as a notification control means and a wireless means for transmitting data at a predetermined periodic notification frequency, wherein the wireless means receives data to be transmitted when it is determined that there is an inclination abnormality. Then, the arrival confirmation and the retransmission control are performed by the confirmation packet , and when it is determined that there is no inclination abnormality , the arrival confirmation and the retransmission control are not performed on the transmitted data , and the water content in the soil is measured. A management device that manages a plurality of slope monitoring devices including the slope monitoring device that does not have a water content sensor and another slope monitoring device that has the water content sensor receives water in the soil from the other slope monitoring device. Upon receiving the amount abnormal data according to the setting command received from the management apparatus, the measurement frequency by the sensor, and the measurement accuracy, as well as improving the periodic notification frequency by the wireless unit, an oblique surface monitoring program.

According to the present invention, in the slope monitoring of the slope monitoring device, it is possible to ensure that the result of the monitoring is notified remotely while paying attention to the power consumption of the slope monitoring device.

It is a functional block diagram of the slope monitoring system which concerns on 1st Embodiment. It is operation explanatory drawing of 1st Embodiment. It is a flowchart which shows the process of 1st Embodiment. It is a functional block diagram of the slope monitoring system which concerns on 2nd Embodiment. It is operation explanatory drawing of the 2nd Embodiment. It is a flowchart which shows the process of 2nd Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.

<< First Embodiment >>
As shown in FIG. 1, the slope monitoring system 100 of the present embodiment includes a detection terminal 10 (slope monitoring device) and a management device 4. The detection terminal 10 and the management device 4 are computers having hardware such as a storage unit, a control unit, and an input / output unit, respectively. In these computers, the CPU realizes various functions of the control unit by executing a program (including a slope monitoring program) read into the memory.

The detection terminal 10 is a wireless terminal that constitutes a sensor network. The detection terminals 10 are distributed and arranged at a plurality of locations in a predetermined area, and there are a plurality of detection terminals 10, but only one is shown in FIG. The detection terminal 10 includes an acceleration sensor 1 (hereinafter, may be simply referred to as a “sensor”), a notification control unit 2 (notification control means), and a wireless unit 3 (wireless means).

[Accelerometer 1]
The acceleration sensor 1 is a sensor capable of measuring acceleration of a plurality of axes, and is, for example, a gyro sensor. The acceleration sensor 1 can measure the gravitational acceleration in a stationary state. Further, the acceleration sensor 1 returns the sensor value to the notification control unit 2 at a designated sampling rate and measurement accuracy in response to a request for reading the sensor value from the notification control unit 2. In general, the power consumption of an accelerometer increases as the sampling rate increases or the measurement accuracy improves.

[Notification control unit 2]
The notification control unit 2 periodically reads out the sensor value (sensing cycle), and determines whether or not the predetermined transmission condition (inclination data transmission condition) is satisfied from the value. When the sensor value matches the transmission condition, the radio unit 3 transmits the tilt data. There are two types of transmission conditions: (1) tilt abnormality and (2) periodic notification.

(1) When the value A of the acceleration sensor 1 at the time of installing the tilt abnormality detection terminal 10 and the value B of the acceleration sensor 1 at the time of reading the sensor are obtained, these values A and B are used to obtain the device from the time of installation (1). The inclination of the detection terminal 10) can be calculated. When the calculated tilt value is equal to or higher than the threshold value specified in advance (when the sensor value matches the transmission condition), the notification control unit 2 determines that there is a tilt abnormality, and the detection data indicating the tilt abnormality, that is, , Send tilt data. The threshold value for determining the inclination abnormality can be set, for example, by the initial setting at the time of device installation or the setting by the setting command from the management device 4.

(2) Periodic notification A periodic notification cycle different from the sensing cycle can be prepared. For example, the read cycle of the sensor can be set to 10 seconds, and the periodic notification cycle can be set to 60 seconds. In this case, the notification control unit 2 reads the sensor once every 10 seconds, but does not immediately transmit the read sensor value, but only when 60 seconds of periodic transmission have elapsed. The detection data is transmitted as. As described above, the elapse of 60 seconds from the previous periodic notification is a condition for the periodic notification, and corresponds to the case where the sensor value matches the transmission condition.

The notification control unit 2 can dynamically change the sensing cycle, the periodic notification cycle, and the settings at the time of reading the sensor (for example, accuracy and sampling rate). For example, in the initial state, the sensing cycle (measurement frequency) and the periodic notification cycle (periodic notification frequency by the wireless unit 3) are set long, and the sensor reading accuracy (measurement accuracy) is set low, but there is an inclination abnormality. After it is determined that the sensor has been determined, the sensing cycle and the periodic notification cycle can be set short to perform sensing with high accuracy.

At this time, depending on the type of the acceleration sensor 1 used, the accuracy may not be set. Even in that case, for example, the variation in the sensor value can be reduced by acquiring the acceleration value as the sensor value a plurality of times and averaging the acquired acceleration value. In addition, the accuracy of sensing can be changed by changing the number of samplings for averaging (generally, the accuracy of sensing improves as the number of samplings increases).

The above-mentioned changes and settings executed by the notification control unit 2 can be made by the management device 4. For example, after the notification control unit 2 notifies the management device 4 of the sensor data, the management device 4 determines whether or not to make the above changes or settings, and if so, the management device 4 determines the corresponding setting command. Can also be realized by transmitting to the notification control unit 2. However, it should be noted that when the management device 4 independently controls in this way, the number of communications such as command transmission increases, so that the current consumption increases as compared with the case where the notification control unit 2 controls. To do.

[Wireless unit 3]
The radio unit 3 transmits the sensor of the acceleration sensor 1 as detection data to the management device 4. The detection data can be transmitted, for example, wirelessly and by multi-hop communication. However, in this case, the detection data may be lost (disappeared) before reaching the management device 4.
Therefore, when the data to be transmitted is important data such as notifying the tilt abnormality, the radio unit 3 performs E2E (End to End) level arrival confirmation by an ACK packet (confirmation packet) and retransmission control. Do. As a result, it is possible to ensure that the detection data reaches the management device 4.

On the other hand, if there is no change in the sensing result and no inclination abnormality is observed in the transmitted data, it can be judged that the data is not important and the influence is small even if it is lost. Therefore, the radio unit 3 does not perform the above arrival confirmation and retransmission control. As a result, the power required for transmission can be saved.

[Management device 4]
The management device 4 manages a plurality of detection terminals including the detection terminal 10 in a predetermined monitoring area. The management device 4 receives the data transmitted by the detection terminal 10 and stores it in the storage unit included in the management device 4. FIG. 1 illustrates a configuration in which the management device 4 receives data by multi-hop communication, but the network configuration may be, for example, a wired LAN (Local Area Network), a wireless LAN, or a mobile phone network. Good. The management device 4 can store the received data in, for example, a database, or notify the user as an alarm.
Further, the management device 4 transmits a setting command to the notification control unit 2 of the detection terminal 10 to change the setting of the detection terminal 10 according to the operation from the user or the sensor value received from the detection terminal 10. It can be carried out.

(Operation of the first embodiment)
The operation of the first embodiment will be described with reference to FIGS. 2 and 3. As shown in FIG. 2, detection terminals 10-0, 10-1, 10-2 (equivalent to the detection terminal 10 in FIG. 1) are installed in various places, and a multi-hop network is formed by the route shown by the line. Suppose there is. As shown in FIG. 3, first, the management device 4 transmits an initial setting command to the detection terminals 10-0, 10-1, and 10-2 (step A1). At the time of step A1, as shown in FIG. 3, the initial setting command may be directly transmitted from the management device 4 to each of the detection terminals 10-0, 10-1, and 10-2. Further, the initial setting command addressed to the detection terminals 10-1 and 10-2 may be transmitted by relaying the detection terminal 10-0.

When each of the detection terminals 10-0, 10-1, and 10-2 receives the default command, the parameters (sensing cycle (long), sensing accuracy (low), tilt abnormality threshold, periodic notification cycle) are followed according to the command. (Long)) is set (step A2). Further, each of the detection terminals 10-0, 10-1, and 10-2 acquires the sensor value "A" of the acceleration sensor 1 in the initial state after setting the parameters (step A3).

The notification control unit 2 of the detection terminals 10-0, 10-1, and 10-2 determines the acceleration sensor value "B" from the acceleration sensor 1 under the condition of sensing accuracy (low) for each sensing cycle (long). Acquire (step A4). Next, the notification control unit 2 calculates the inclination of the device from the acquired sensor value “B” and the sensor value “A” in the initial state, and compares it with the inclination abnormality threshold value (step A5).

When the inclination of the device is smaller than the inclination abnormality threshold value, the notification control unit 2 does not transmit the detection data because there is no abnormality. Further, even if the tilt of the device continues to be smaller than the tilt abnormality threshold value and there is no abnormality, when the periodic notification cycle elapses, the radio unit 3 of the detection terminals 10-0, 10-1, 10-2 will display the detection data. Is transmitted to the management device 4 (step A6). At this time, the detection terminal 10-0 relays not only its own detection data but also the detection data of the detection terminals 10-1 and 10-2, and transmits the detection data to the management device 4.
Since the transmitted detection data is not important data, the arrival confirmation and retransmission control by the radio unit 3 of the detection terminals 10-0, 10-1, and 10-2 are not performed.

On the other hand, for example, when the vicinity of the detection terminal 10-1 is tilted, the notification control unit 2 of the detection terminal 10-1 makes a determination based on the tilt abnormality threshold value at a predetermined sensing timing, and as a result, the tilt of the device is tilted abnormally. It is determined that the value exceeds the threshold value. The detection terminal 10-1 transmits the tilt data from the radio unit 3 (step A7). Further, the detection terminal 10-1 changes the parameters to (sensing cycle (short), sensing accuracy (high), periodic notification cycle (short)) (step A8). After that, the detection terminal 10-1 performs sensing with high accuracy, and also performs sensing and periodic notification in a short cycle.
Since the transmitted detection data is important data, arrival confirmation and retransmission control are performed by the radio unit 3 of the detection terminal 10-1.

(Effect of the first embodiment)
According to the first embodiment, the sensing and detection data transmission cycle and the sensing accuracy can be changed according to the situation. That is, when the slope is stable, the current consumption for sensing and the frequency of data transmission are reduced, so that the battery life of the detection terminal 10 can be extended. In addition, when the slope condition changes, it becomes possible to perform high-frequency and high-precision detection. In this way, the detection terminal 10 can simultaneously realize long-term operation by the battery and high-precision monitoring.

<< Second Embodiment >>
In the description of the second embodiment, the description of the portion overlapping with the description of the first embodiment will be omitted, and the differences will be mainly described.
As shown in FIG. 4, in the slope monitoring system 100a of the present embodiment, as compared with the first embodiment, the detection terminal 10 is provided with the water content sensor 5 (sensor), and the detection terminal 10a is provided. , The point that the management device 4 acquires the weather information 7 is added.

[Moisture content sensor 5]
The water content sensor 5 is, for example, a sensor installed in the soil. The water content sensor 5 can measure the water content in the soil, which is roughly proportional to the dielectric constant, for example, by measuring the dielectric constant of the soil. In addition, the water content sensor 5 can measure changes in the water content in the soil, for example, by performing measurements on a regular basis. When the water content sensor 5 measures the water content exceeding a predetermined water content abnormality threshold value, the detection terminal 10 transmits the water content detection data from the wireless unit 3. Further, the water content sensor 5 can perform periodic notification of the measured water content, and can change the periodic notification cycle, for example, like the acceleration sensor 1.

[Detection terminal 10a]
The detection terminal 10a is another communication terminal existing in the vicinity of the detection terminal 10. The detection terminal 10a is arranged at a position where it can communicate with the detection terminal 10. The detection terminal 10a does not have the water content sensor 5, and has the same function as the detection terminal 10 except for this point. Even if the value of the acceleration sensor 1 measured by the detection terminal 10a itself does not show an abnormality (when the transmission condition of the sensor value is not met), the detection terminal 10 detects the abnormality and the management device 4 detects the abnormality. Upon receiving the detection data of, the management device 4 transmits a setting command to the detection terminal 10a, so that the detection terminal 10a switches to high-precision and high-frequency measurement.
Further, even when the detection terminal 10a itself cannot detect the abnormality of the water content, when the detection terminal 10 detects the abnormality of the water content and the management device 4 receives the detection data of the abnormality, the management device 4 transmits a setting command to the detection terminal 10a, so that the detection terminal 10a switches to high-precision and high-frequency measurement.

[Weather information 7]
The weather information 7 is information that the management device 4 acquires from the outside (eg, a predetermined information site) via the Internet or the like. The weather information 7 is information indicating, for example, a forecast value of rainfall. The management device 4 transmits a setting command to the detection terminal 10 installed in rainy weather based on the weather information 7, so that the detection terminal 10 switches to high-precision and high-frequency measurement. Further, the management device 4 transmits a setting command to the detection terminal 10 installed in fine weather based on the weather information 7, so that the detection terminal 10 switches to low-precision and low-frequency measurement.

The water content measured by the water content sensor 5 can be precursor information such as a landslide that causes an abnormality in the inclination of the detection terminal 10. The water content sensor 5 can detect the tilt abnormality of the detection terminal 10 with a predetermined probability at a timing earlier than that of the acceleration sensor 1. That is, the detection data of the water content sensor 5 can be used as information to reinforce the detection data of the acceleration sensor 1. Therefore, by providing the detection terminal 10 with the water content sensor 5, the determination based on the inclination abnormality threshold value can be strengthened. Further, the management device 4 can transmit the setting command to the surrounding detection terminals 10a at an earlier timing by using the detection data of the water content from the detection terminal 10.

The weather information 7 can provide the water content information at a stage earlier than the measurement timing of the water content sensor 5. The management device 4 can detect an abnormality in the water content with a predetermined probability at a timing earlier than that of the water content sensor 5. That is, the weather information 7 can be used as information to reinforce the detection data of the water content sensor 5, and can be used as information to reinforce the detection data of the acceleration sensor 1. Therefore, the management device 4 can transmit the setting command to the surrounding detection terminal 10a at an earlier timing by using the weather information 7.

(Operation of the second embodiment)
The operation of the second embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 corresponds to the content of FIG. 2 in which the weather information 7 that can be acquired by the management device 4 is additionally illustrated. As shown in FIG. 6, first, the management device 4 transmits an initial setting command to the detection terminals 10-0, 10-1, and 10-2 (step A1). At the time of step A1, as shown in FIG. 6, the initial setting command may be directly transmitted from the management device 4 to each of the detection terminals 10-0, 10-1, and 10-2. Further, the initial setting command addressed to the detection terminals 10-1 and 10-2 may be transmitted by relaying the detection terminal 10-0.

When each of the detection terminals 10-0, 10-1, and 10-2 receives the default command, the parameters (sensing cycle (long), sensing accuracy (low), tilt abnormality threshold value, and water content abnormality) are followed according to the command. The threshold value and the periodic notification cycle (long)) are set (step A2). Further, each of the detection terminals 10-0, 10-1, and 10-2 acquires the sensor value "A" of the acceleration sensor 1 in the initial state after setting the parameters (step A3). Hereinafter, since the processing related to the tilt abnormality based on the sensor value of the acceleration sensor 1 is the same as the operation of the first embodiment, description and illustration will be omitted.

Next, each of the detection terminals 10-0, 10-1, and 10-2 acquires the water content sensor value measured by the water content sensor 5 (step B1). When the value of the water content sensor 5 of the detection terminal 10-1 exceeds the water content abnormality threshold value, the detection terminal 10-1 transmits the measured water content sensor value as detection data from the wireless unit 3 (step B2). At the same time, the detection terminal 10-1 changes the parameters to (sensing cycle (short), sensing accuracy (high), periodic notification cycle (short)) (step B3).

When the management device 4 receives the detection data (moisture content data in the soil) transmitted by the detection terminal 10-1, the management device 4 refers to the detection terminal 10-2 installed in the vicinity of the detection terminal 10-1. And send the setting command (step B4). When the detection terminal 10-2, which has not originally measured an abnormal amount of water, receives a setting command, it changes the parameters to (sensing cycle (short), sensing accuracy (high), periodic notification cycle (short)) ( Step B5).
The management device 4 can send a setting command to the detection terminal 10 that does not have the water content sensor 5 to change the parameters in response to the acquisition of the detection data from the detection terminal 10-1.

On the other hand, the management device 4 periodically acquires the weather information 7 (step B6). When the management device 4 acquires the precipitation information in the monitoring area, it senses each of the detection terminals 10-0, 10-1, and 10-2 installed in the monitoring area with high accuracy and high frequency. A setting command for changing parameters is transmitted (step B7). At the time of step B7, as shown in FIG. 6, the setting command for changing the parameter may be directly transmitted from the management device 4 to each of the detection terminals 10-0, 10-1, and 10-2. Further, the setting command for changing the parameters addressed to the detection terminals 10-1 and 10-2 may be transmitted by relaying the detection terminals 10-0.
When the detection terminal 10 that does not have the water content sensor 5 is installed in the monitoring area, the management device 4 also sets the detection terminal 10 for parameter change so as to perform sensing with high accuracy and high frequency. Send a command.

(Effect of the second embodiment)
According to the second embodiment, the management device 4 can also notify the peripheral detection terminals 10 of the abnormality information detected by the detection terminal 10. Therefore, the setting change according to the increase in the water content can be reflected even in the detection terminal 10 that has not detected the abnormality and the detection terminal 10 that does not have the water content sensor 5. Further, the management device 4 can control the operation of the detection terminal 10 by the weather information 7 obtained from the outside. Therefore, the sensing setting can be optimized from information other than the information (moisture amount) directly detected by the detection terminal 10 by the water content sensor 5.

≪Modification example≫
(1): The arithmetic process of acquiring the acceleration value of the acceleration sensor 1 a plurality of times and averaging the acquired acceleration values described in the first embodiment is the water content sensor described in the second embodiment. It can also be applied to the water content of 5, and the average value can be obtained.
(2): When the management device 4 receives the detection data (moisture content data in the soil) transmitted by the detection terminal 10-1 in the second embodiment, the management device 4 moves to the vicinity of the detection terminal 10-1. The technique of transmitting a setting command to the installed detection terminal 10-2 can also be applied to the detection data based on the acceleration sensor value described in the first embodiment. That is, when the management device 4 receives the detection data (data indicating the tilt abnormality) received from a certain detection terminal 10, the management device 4 sets a command (parameters (sensing cycle (short)) to another detection terminal 10 installed in the vicinity. , Sensing accuracy (high), periodic notification cycle (short)) can be sent.
(3) When the detection terminal 10 detects an inclination abnormality and changes the parameters of the sensing cycle, the sensing accuracy, and the periodic notification cycle, even if at least one of the sensing cycle, the sensing accuracy, and the periodic notification cycle is changed. Good.

100 Slope monitoring system 10,10-1,10-2,10-3,10a Detection terminal (slope monitoring device)
1 Accelerometer (sensor)
2 Notification control unit (notification control means)
3 Wireless section (wireless means)
4 Management device 5 Moisture content sensor (sensor)
7 Weather information

Claims (7)

It is a slope monitoring device that monitors the slope with a sensor and detects the occurrence of a natural disaster.
A notification control unit that reads out the sensor value and determines whether or not there is an inclination abnormality ,
Equipped with a wireless unit that transmits data at a predetermined periodic notification frequency
When it is determined that there is an inclination abnormality , the radio unit performs arrival confirmation and retransmission control by a confirmation packet on the data to be transmitted , and when it is determined that there is no inclination abnormality, the transmitted data is subjected to. On the other hand, without performing the arrival confirmation and retransmission control,
The management device that manages a plurality of slope monitoring devices including the slope monitoring device that does not have a water content sensor for measuring the water content in the soil and another slope monitoring device that has the water content sensor is the other slope. When the data of the water content abnormality in the soil is received from the monitoring device, the measurement frequency and the measurement accuracy by the sensor and the periodic notification frequency by the radio unit are improved according to the setting command received from the management device.
A slope monitoring device characterized by this. The notification control unit in response to a result of the determination, measurement frequency by the sensor, and the measurement accuracy, as well as to change the periodic notification frequency by the wireless unit,
The slope monitoring device according to claim 1. The sensor is an acceleration sensor
The notification control unit makes the determination by comparing the value in the initial state measured by the acceleration sensor at the time of installing the slope monitoring device with the value measured by the acceleration sensor thereafter.
The slope monitoring device according to claim 1 or 2, wherein the slope monitoring device is characterized in that. The value of the sensor is an average value of the values acquired by the sensor a plurality of times.
The slope monitoring device according to any one of claims 1 to 3, wherein the slope monitoring device is characterized in that. When the management device acquires precipitation information as weather information from the outside, the measurement frequency and measurement accuracy by the sensor and the periodic notification frequency by the radio unit are improved according to the setting command received from the management device. Let,
The slope monitoring device according to any one of claims 1 to 4, wherein the slope monitoring device is characterized. It is a slope monitoring method in a slope monitoring device that monitors a slope with a sensor to detect the occurrence of a natural disaster.
The slope monitoring device
A determination step of reading the sensor value and determining whether or not there is an inclination abnormality , and
When the radio unit that transmits data at a predetermined periodic notification frequency determines that the tilt abnormality is present , the data to be transmitted is subjected to arrival confirmation and retransmission control by a confirmation packet, and if there is no tilt abnormality, If it is determined , the arrival confirmation and the confirmation / retransmission step in which the retransmission control is not performed are executed for the data to be transmitted.
The management device that manages a plurality of slope monitoring devices including the slope monitoring device that does not have a water content sensor for measuring the water content in the soil and another slope monitoring device that has the water content sensor is the other slope. When the data of the water content abnormality in the soil is received from the monitoring device, the measurement frequency and the measurement accuracy by the sensor and the periodic notification frequency by the radio unit are improved according to the setting command received from the management device.
A slope monitoring method characterized by this. A computer as a slope monitoring device that monitors slopes with sensors and detects the occurrence of natural disasters.
A notification control means that reads the value of the sensor and determines whether or not there is an inclination abnormality .
It is a slope monitoring program for functioning as a wireless means for transmitting data at a predetermined periodic notification frequency.
When it is determined that there is an inclination abnormality , the wireless means performs arrival confirmation and retransmission control by a confirmation packet on the data to be transmitted , and when it is determined that there is no inclination abnormality, the transmitted data is subjected to. On the other hand, without performing the arrival confirmation and retransmission control,
The management device that manages a plurality of slope monitoring devices including the slope monitoring device that does not have a water content sensor for measuring the water content in the soil and another slope monitoring device that has the water content sensor is the other slope. When the data of the water content abnormality in the soil is received from the monitoring device, the measurement frequency and the measurement accuracy by the sensor and the periodic notification frequency by the wireless means are improved according to the setting command received from the management device.
Oblique surface monitoring program.

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