JP7015191B2 - Detection device, detection system and detection program - Google Patents

Description

The present invention relates to a detection device, a detection system and a detection program.

There is a technology to monitor human behavior and environmental conditions by utilizing the detection data acquired by the sensor. The sensor is composed of, for example, a BLE (Bluetooth Low Energy) device (Bluetooth is a registered trademark). Such sensors are battery driven. In order to reduce the power consumption of the sensor, a technique for setting the data acquisition frequency based on the error between the measured value and the estimated value of the data is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2017-130041

In order to acquire the detection data necessary for grasping various situations, a plurality of sensors are installed for the detection target, and the detection data from each sensor is collected by the terminal. The sensor is composed of power-saving devices, but further reduction in power consumption is required. Further, when the terminal that collects the detection data is also driven by a battery, it is required to reduce the power consumption. On the other hand, a certain number of detection data is required to obtain the information necessary for grasping the status of the detection target.

Therefore, the present invention has been made in view of the above problems, and provides a detection device, a detection system, and a detection program capable of acquiring sufficient data for grasping the situation of the detection target while reducing power consumption. The purpose is to provide.

In order to solve the above problems, the detection device according to one embodiment of the present invention is a detection device that acquires detection data from a plurality of sensors driven by a battery and controls the operation of the sensors, and is a detection device that controls the operation of the sensors from the plurality of sensors. An acquisition unit that acquires detection data, a calculation unit that calculates the frequency of data loss indicating the frequency of occurrence of an event that the detection data transmitted from the sensor operating in the first operation method was not acquired in the acquisition unit, and a calculation unit. The operation method in a plurality of sensors is determined based on the data loss frequency of each sensor, and when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the frequency is lower than that of the first operation method. Based on the determination by the determination unit and the determination unit, which determines that the operation method of at least one of the sensors operating by the other operation method for transmitting the detection data is changed to the first operation method. It is provided with an instruction unit for transmitting instruction information for changing the operation method of each sensor.

In order to solve the above problems, the detection system according to one embodiment of the present invention is a detection system including a plurality of sensors and a detection device driven by a battery, in which the detection device acquires detection data from the plurality of sensors. , The sensor includes an operation control unit that controls the operation method of the sensor, and operates by any of the first operation method and another operation method different from the first operation method, and the first operation method is Detection data is transmitted to the detection device more frequently than other operation methods, and the detection device has an acquisition unit that acquires detection data from multiple sensors and detection data transmitted from the sensor that operates in the first operation method. The first operation method is determined by determining the operation method of a plurality of sensors based on the data loss frequency of each sensor and the calculation unit that calculates the frequency of data loss indicating the frequency of occurrence of the event that was not acquired in the acquisition unit. When the data loss frequency of the sensor operating in the above is equal to or higher than a predetermined threshold value, it is determined that the operation method of at least one of the sensors operating in the other operation methods is changed to the first operation method. A determination unit and an instruction unit for transmitting instruction information for changing the operation method of each sensor based on the determination by the determination unit are provided, and the operation control unit of the sensor operates in response to an instruction from the instruction unit. The sensor is operated according to the method.

Further, the detection program according to one embodiment of the present invention is a detection program that causes a computer to acquire detection data from a plurality of sensors driven by a battery and function as a detection device that controls the operation of the sensors. , Data indicating the frequency of occurrence of the acquisition function for acquiring detection data from multiple sensors on the computer and the occurrence of the event that the detection data transmitted from the sensor operating in the first operation method was not acquired in the acquisition unit. When the operation method of a plurality of sensors is determined based on the calculation function for calculating the loss frequency and the data loss frequency of each sensor, and the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value. In addition, a determination function for determining that the operation method of at least one of the sensors operating in another operation method that transmits detection data less frequently than the first operation method is changed to the first operation method. And, based on the judgment by the judgment function, the instruction function for transmitting the instruction information for changing the operation method of each sensor to each sensor is realized.

In the above embodiment, when the data loss frequency in the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the sensor operates in another operation method in which the detection data transmission frequency is lower than that in the first operation method. The operation method of the sensor is changed to the first operation method. As a result, when the frequency of data loss is low, the sensor is operated by an operation method with low power consumption, and power consumption can be reduced. Further, when the frequency of data loss is high, the sensor is operated by an operation method in which the detection data is acquired more frequently, so that sufficient detection data is acquired to grasp the situation of the detection target.

While reducing power consumption, it is possible to acquire sufficient data to understand the status of the detection target.

It is a figure which shows the apparatus configuration of the detection system which concerns on this embodiment. It is a block diagram which shows the functional composition of a terminal and a sensor. It is a hard block diagram of a terminal. It is a figure which shows each operation method of the sensor in a detection system. It is a figure which shows the example of the detection data acquired by the acquisition part. 6 (a), 6 (b) and 6 (c) are diagrams showing an example of calculating the data loss frequency. It is a flowchart which shows the processing content of the detection method of this embodiment. It is a figure which shows the structure of the detection program.

An embodiment of the detection system according to the present invention will be described with reference to the drawings. If possible, the same parts will be designated by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is a diagram showing a device configuration of the detection system 1 according to the present embodiment. As shown in FIG. 1, the detection system 1 includes a terminal 10 (detection device) and a plurality of sensors 20. The sensor 20 of the present embodiment is, for example, a sensor device such as a temperature sensor, a sunshine sensor, and a motion sensor, and is composed of, for example, a BLE device. Further, the sensor 20 is driven by a battery.

In the detection system 1 of the present embodiment, a plurality of sensors 20 are provided for the detection target, and the terminal 10 acquires detection data regarding the status of the detection target from the plurality of sensors 20. The terminal 10 acquires the detection data from the sensor 20 by Bluetooth (registered trademark) communication. Further, the terminal 10 controls the operation of the sensor 20 by transmitting the instruction information described later to the sensor 20. Although four sensors 20 are shown in FIG. 1, the number of sensors is not limited.

The detection system 1 of the present embodiment can detect, for example, the temperature of a paddy field. In this case, sensors 20 which are temperature sensors are provided at a plurality of places around the paddy field. The terminal 10 acquires detection data including temperature information detected by the sensor 20.

Further, the detection system 1 of the present embodiment can detect, for example, the sunshine condition of a specific place. In this case, sensors 20 which are illuminance sensors are provided at a plurality of places around a specific place. The terminal 10 acquires detection data including the illuminance information detected by the sensor 20.

Further, the detection system 1 of the present embodiment can detect, for example, the number of people staying in a specific place. In this case, sensors 20 which are motion sensors are provided at a plurality of places around a specific place. The terminal 10 acquires detection data including the location information of the person detected by the sensor 20.

The terminal 10 is a mobile terminal device, and may be, for example, a portable personal computer, or a mobile terminal such as a high-performance mobile phone (smartphone) or a mobile phone. In the present embodiment, the terminal 10 is configured to be able to receive the Bluetooth signal from the sensor 20.

Further, the terminal 10 can communicate with various resources on the Internet IN via the network N. The terminal 10 of the present embodiment can acquire temperature information, sunshine information, weather information, and the like in the area to be detected from resources on the Internet IN. Further, the terminal 10 can acquire information on the number of users of the mobile terminal in the detection target area.

FIG. 2 is a block diagram showing a functional configuration of the terminal 10 and the sensor 20. As shown in FIG. 2, the terminal 10 includes an acquisition unit 11, a calculation unit 12, a threshold value setting unit 13, a determination unit 14, and an instruction unit 15. Further, the terminal 10 may include a detection data storage unit 16.

The sensor 20 includes a detection unit 21, a transmission unit 22, a reception unit 23, and an operation control unit 24. Here, prior to the description of each functional unit of the terminal 10, each functional unit of the sensor 20 will be described.

The detection unit 21 acquires the detection value related to the detection target. The detected value differs depending on the sensor device constituting the sensor 20. When the sensor 20 is, for example, a temperature sensor, the detection unit 21 acquires temperature information. When the sensor 20 is, for example, an illuminance sensor, the detection unit 21 acquires illuminance information.

The transmission unit 22 transmits the detection data including the detection value acquired by the detection unit 21 to the terminal 10. The receiving unit 23 receives the instruction information regarding the operation method of the sensor 20 transmitted from the terminal 10. The motion control unit 24 controls the motion of the sensor 20 so that the sensor 20 is operated by the motion method based on the instruction information.

The block diagram shown in FIG. 2 shows a block of functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly by two or more physically and / or logically separated devices. (For example, wired and / or wireless) may be connected and realized by these plurality of devices.

For example, the terminal 10 in one embodiment of the present invention may function as a computer. FIG. 3 is a diagram showing an example of the hardware configuration of the terminal 10 according to the present embodiment. The terminal 10 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the word "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the terminal 10 may be configured to include one or more of the devices shown in FIG. 3, or may be configured not to include some of the devices.

For each function in the terminal 10, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an calculation, communication by the communication device 1004, and communication in the memory 1002 and the storage 1003. It is realized by controlling the reading and / or writing of data.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, each of the functional units 11 to 15 shown in FIG. 1 may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module and data from the storage 1003 and / or the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, each functional unit 11 to 15 of the terminal 10 may be realized by a control program stored in the memory 1002 and operated by the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted on one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing memory 1002 and / or storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be composed of a single bus or may be composed of different buses between the devices.

Further, the terminal 10 includes hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). The hardware may implement some or all of each functional block. For example, the processor 1001 may be implemented on at least one of these hardware.

Next, with reference to FIG. 4, the operation method of the sensor 20 in the detection system 1 of the present embodiment will be described. The sensor 20 operates by either a periodic method (first operation method) or another operation method different from the periodic method. Specifically, other operation methods in the sensor 20 include a trigger method (second operation method) and a read method (third operation method).

As shown in FIG. 4, the periodical method is an operation method of transmitting detection data to the terminal 10 at predetermined fixed time intervals.

In the trigger method, as shown in FIG. 4, when a predetermined change appears in the detection value by the sensor 20, or after the detection data is transmitted from the sensor 20 to the terminal 10, a predetermined predetermined time has elapsed. In this case, the sensor 20 transmits the detection data to the terminal 10. That is, the detection data is transmitted to the terminal 10 mainly by the sensor 20 with the event determined on the sensor 20 side as a trigger.

As shown in FIG. 4, the read method is an operation method in which the sensor 20 transmits detection data to the terminal 10 in response to a request from the terminal 10. The terminal 10 transmits a request to the sensor 20 based on the surrounding environment information related to the detection target of the sensor 20. In this embodiment, the terminal 10 acquires peripheral environment information from various resources on the Internet IN, for example.

Specifically, for example, when the detection target is the temperature of the paddy field, the terminal 10 acquires the temperature information of the area where the paddy field is located as the surrounding environment information. Further, when the detection target is the sunshine condition of a specific place, the terminal 10 acquires the sunshine information of the area to which the specific place belongs as the surrounding environment information. When the detection target is the number of people staying in a specific place, the terminal 10 acquires information on the number of users of the mobile terminal in the area to which the specific place belongs as peripheral environment information.

When the amount of change in the surrounding environment information acquired in time series exceeds a predetermined threshold value, the terminal 10 transmits a request for acquisition of detection data to the sensor 20. In the present embodiment, the correlation between the amount of change in the surrounding environment information and the amount of change in the value detected by the sensor 20 is determined, and a predetermined threshold value regarding the amount of change in the surrounding environment information is set based on the magnitude of the correlation. To. Specifically, the greater the correlation between the amount of change in the surrounding environment information and the amount of change in the value detected by the sensor 20, the lower the predetermined threshold value for the amount of change in the surrounding environment information is set.

The trigger method and the read method are operation methods for transmitting detection data to the terminal 10 at a lower frequency than the periodic method. Further, the periodic method consumes more power than the trigger method and the read method. The read method is an operation method in which the frequency of transmission of detection data is lower than that of the trigger method. Further, the trigger method consumes more power than the read method.

Each functional unit of the terminal 10 will be described with reference to FIG. 2 again. The acquisition unit 11 acquires detection data from a plurality of sensors 20. FIG. 5 is a diagram showing an example of detection data acquired by the acquisition unit 11. When the detection system 1 is a system that detects the temperature of the detection target, the plurality of sensors 20 provided in the detection target acquire the temperature as a detection value. Then, the sensor 20 transmits the detection data including the data type, the time (detection time) and the detection value (temperature value) to the terminal 10 as shown in FIG. The acquisition unit 11 of the terminal 10 acquires the detection data transmitted from the sensor 20. Then, the acquisition unit 11 stores the detection data acquired from each sensor 20 in the detection data storage unit 16. The detection data storage unit 16 is a storage means for storing the detection data acquired by the acquisition unit 11. As shown in FIG. 2, the detection data storage unit 16 may be provided in the terminal 10 or may be configured in another device accessible from each functional unit of the terminal 10.

The calculation unit 12 calculates the data loss frequency in the detection data from the sensor 20 operating in the periodic method among the plurality of sensors 20. The data loss frequency indicates the frequency of occurrence of the event that the detection data transmitted from the sensor 20 operating in the periodic method was not acquired by the acquisition unit 11 for some reason. In the present embodiment, the data loss frequency is, for example, information (value) indicating the ratio of the number of detected data not acquired to the number of detected data expected to be acquired by the acquisition unit 11 per unit time. Is.

In the data transfer by wireless communication exemplified by Bluetooth, the detection data transmitted from the sensor 20 may not be acquired by the terminal 10 depending on the communication environment. The data loss frequency indicates the frequency of such failures in acquiring detected data. For example, when the distance between the sensor 20 and the terminal 10 is long, or when there are many obstacles between the sensor 20 and the terminal 10, the frequency of data loss increases.

6 (a) to 6 (c) are diagrams showing an example of calculating the data loss frequency. Reference numeral f1 indicates an example in which the detection data of 11 is acquired by the acquisition unit 11 when it is assumed that the detection data of 11 is acquired per predetermined unit time. In this case, the calculation unit 12 uses the following equation (1).
(11-11) / 11 × 100 = 0 (1)
Calculate that the data loss frequency is 0%.

Further, reference numeral f2 indicates an example in which the detection data of 10 is acquired by the acquisition unit 11 when it is assumed that the detection data of 11 is acquired per predetermined unit time. In this case, the calculation unit 12 uses the following equation (2).
(11-10) /11 × 100 = 9.09 ... (2)
Calculate that the data loss frequency is 9%.

Further, reference numeral f3 indicates an example in which the detection data of 7 is acquired by the acquisition unit 11 when it is assumed that the detection data of 11 is acquired per predetermined unit time. In this case, the calculation unit 12 uses the following equation (3).
(11-7) /11 × 100 = 36.36 ... (3)
It is calculated that the data loss frequency is 36%.

The threshold value setting unit 13 sets a predetermined threshold value regarding the data loss frequency in the determination of the operation method based on the data loss frequency by the determination unit 14 described in detail later. Specifically, the threshold value setting unit 13 sets a predetermined threshold value regarding the data loss frequency of the sensor 20 based on the received signal strength indicating the strength of the signal received from the sensor 20 at the terminal 10. The received signal strength is, for example, an RSSI (Received Signal Strength Information) value.

For example, when the received signal strength is constantly high, the frequency of data loss is due to the fact that the distance between the sensor 20 and the terminal 10 is short and there is little obstruction between the sensor 20 and the terminal 10. Is expected to be a low value, so the threshold value setting unit 13 sets a predetermined threshold value regarding the data loss frequency to be lower.

Further, for example, when the received signal strength is constantly low, the data is caused by the fact that the distance between the sensor 20 and the terminal 10 is long and there are many obstacles between the sensor 20 and the terminal 10. Since it is assumed that the loss frequency will be a high value, the threshold value setting unit 13 sets a predetermined threshold value regarding the data loss frequency higher. In setting these threshold values, the correspondence between the received signal strength and the predetermined threshold value can be set by design.

Further, when the received signal strength fluctuates with respect to the time series, the change in the communication environment is large (for example, there are many movements of people and objects between the sensor 20 and the terminal 10), so that the received signal strength is high. Can be considered unreliable for the value of. In this case, the threshold setting unit 13 sets a higher predetermined threshold value regarding the data loss frequency.

The reliability of the value of the received signal strength (the degree of fluctuation of the received signal strength) is calculated and determined by the threshold value setting unit 13 as follows, for example.
The average value and standard deviation value (STD) of the 20 most recently measured received signal strength values are calculated.
Based on the 10 most recently measured received signal strength values, the weighted moving average value WMA _M is calculated by the following formula.
WMA _M = (np _M + (n-1) p _M-1 + ... + 2p _{Mn + 2} + p _{Mn + 1} ) / (n + (n-1) + ... + 2 + 1)
P: Target value of weighted moving average, M: Data number, n: Weight Here, assuming that the weighted moving average of the 10 most recently measured received signal strength values is RSSI_ave1, the judgment condition regarding the latest received signal strength value ( Condition A) is as follows.
Condition A: RSSI_ave1-STD <= (latest received signal strength value) <= RSSI_ave1 + STD
The threshold value setting unit 13 determines whether or not the latest received signal strength value satisfies the condition A every time the received signal strength is acquired, and the frequency at which the received signal strength that does not satisfy the condition A is acquired is , When the predetermined threshold value with respect to the condition A is exceeded, it is determined that the reliability with respect to the value of the received signal strength is low.

In this way, considering that the number of detected data expected to be acquired per unit time changes according to the received signal strength, the higher the received signal strength, the higher the predetermined threshold value regarding the data loss frequency. Since it is set low, it is possible to determine an appropriate operation method.

The determination unit 14 determines the operation method of the plurality of sensors 20 based on the data loss frequency of each sensor 20. Specifically, the determination unit 14 operates the sensor 20 of at least one of the sensors operating in the trigger method or the read method when the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value. Determine to change the method to the periodic method. For example, the determination unit 14 changes the operation method of at least one sensor 20 of the sensors operating in the trigger method to the periodic method when the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value. Determine to do.

In this way, when the data loss frequency of the sensor 20 operating in the periodic method is high, the sensor 20 operating in the trigger method is operated by the periodic method in which the detection data is acquired more frequently than in the trigger method. Therefore, sufficient detection data is acquired to grasp the situation of the detection target. On the other hand, when the data loss frequency of the sensor 20 operating in the periodic system is less than a predetermined threshold value, the sensor 20 operating in the trigger system continues to operate in the trigger system, so that power consumption can be reduced.

Further, when the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value, the determination unit 14 uses the operation method of at least one sensor 20 of the sensors 20 operating in the read method as the trigger method. It may be determined to change.

In this way, when the data loss frequency of the sensor 20 operating in the periodic method is high, the sensor 20 operating in the read method is operated by the trigger method in which the detection data is acquired more frequently than in the read method. Therefore, the number of detection data for grasping the situation of the detection target is complemented. On the other hand, when the data loss frequency of the sensor 20 operating in the periodic system is less than a predetermined threshold value, the sensor 20 operating in the read system continues to operate in the read system, so that power consumption can be reduced.

Further, when the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value, the determination unit 14 is at least one of the non-operating sensors 20 among the sensors 20 included in the detection system 1. It may be determined that the two sensors 20 are operated by the trigger method or the lead method. For example, when the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value, the determination unit 14 operates the sensor 20 of at least one of the non-operating sensors 20 in the read method. You may judge.

As described above, when the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value, the sensor 20 operates in view of the possibility that the number of detected data acquired in the entire system may not be sufficient. By operating the non-existing sensor 20 by the read method (or the trigger method), the number of detection data acquired by the entire system can be complemented.

Further, the determination unit 14 determines that the total number of detection data acquired by the terminal 10 from the plurality of sensors 20 is less than a predetermined number when the data loss frequency of the sensors 20 operating in the periodic method is equal to or higher than a predetermined threshold value. , It may be determined that the operation method of the sensor 20 operating in the trigger method or the lead method is changed to the periodic method or the trigger method, respectively.

In this case, when the number of detection data acquired by the terminal 10 from the plurality of sensors 20 is less than a predetermined number, the operation method of the sensor 20 operating by the trigger method or the read method is more frequently detected data. Is changed to the operation method to be acquired, so that it is possible to acquire the detection data necessary for grasping the situation of the detection target. On the other hand, when the number of detection data acquired by the terminal 10 from the plurality of sensors 20 is not less than a predetermined number, it is considered that a sufficient number of detection data has been acquired to grasp the situation of the detection target, and the power consumption is high. Since no change to a higher operating method is made, an increase in power consumption is prevented.

Next, after the operation method of the sensor 20 is changed to an operation method in which the power consumption is higher and the detection data is acquired frequently, the power consumption is lower and the detection data is acquired less frequently. The change to the operation method will be described.

When the determination unit 14 determines that the operation method is changed from the trigger method or the read method to the periodic method, the determination unit 14 operates the plurality of sensors 20 among the plurality of sensors 20 in the periodic method. Reference numeral 14 is included among the plurality of sensors 20 operating in the periodic system when the data loss frequency of at least one of the plurality of sensors 20 operating in the periodic system is less than a predetermined threshold value. It may be determined that the operation method of any of the sensors 20 is changed to the trigger method. Specifically, the determination unit 14 may change the operation method of the sensor 20 whose data loss frequency is not less than a predetermined threshold value among the plurality of sensors 20 operating in the periodic method to the trigger method.

That is, when the data loss frequency of at least one of the plurality of sensors operating in the periodic method for acquiring the detection data with high frequency is less than a predetermined threshold value, it is sufficient to grasp the situation of the detection target. Since it can be considered that a large number of detection data have been acquired, it is sufficient to change the operation method of any one of the plurality of sensors 20 operating in the periodic method to the trigger method. It is possible to reduce power consumption while maintaining the acquisition of the number of detection data.

Further, when the determination unit 14 determines that the operation method is changed from the trigger method or the read method to the periodic method, the plurality of sensors 20 among the plurality of sensors 20 are operating in the periodic method. The determination unit 14 determines at least one sensor 20 operating in the trigger system when the data loss frequency of at least one sensor 20 among the plurality of sensors 20 operating in the periodic system is less than a predetermined threshold value. It may be determined that the operation method of at least one of the sensors 20 is changed to the lead method.

That is, when the data loss frequency of at least one of the plurality of sensors 20 operating in the periodic method for acquiring the detection data with high frequency is less than a predetermined threshold value, the status of the detection target is grasped. Since it can be considered that a sufficient number of detection data has been acquired, it is sufficient to change the operation method of any one of the sensors 20 operating in the trigger method to the read method. It is possible to reduce power consumption while maintaining the acquisition of the number of detection data.

Further, when the plurality of sensors 20 among the plurality of sensors 20 are operating in the periodic system, the determination unit 14 is the data of at least one sensor 20 among the plurality of sensors 20 operating in the periodic system. When the loss frequency is less than a predetermined threshold value, it may be determined that the operation of the sensor 20 operating by the read method is stopped. This makes it possible to further reduce power consumption while maintaining the acquisition of a sufficient number of detection data.

The instruction unit 15 transmits instruction information for changing the operation method of each sensor 20 based on the determination by the determination unit 14.

Next, the detection method in the detection system 1 will be described with reference to FIG. 7. FIG. 7 is a flowchart showing the processing contents of the detection method of the present embodiment.

In step S1, the detection system 1 starts detecting the status of the detection target. In step S2, detection data from a plurality of sensors 20 are acquired. In the following step S3, the data loss frequency in the detection data from the sensor 20 operating in the periodic method among the plurality of sensors 20 is calculated.

Next, in step S4, it is determined whether or not the data loss frequency of the sensor 20 operating in the periodic method is equal to or higher than a predetermined threshold value. A predetermined threshold value regarding the data loss frequency is appropriately set by the threshold value setting unit 13. If it is determined that the data loss frequency is equal to or higher than a predetermined threshold value, the process proceeds to step S5. On the other hand, if it is not determined that the data loss frequency is equal to or higher than the predetermined threshold value, the process returns to step S2.

In step S5, the determination unit 14 determines that the operation method of the sensor operating by the trigger method is changed to the periodic method. Here, the determination unit 14 may further determine that the operation method of the sensor 20 operating in the lead method is changed to the trigger method. Further, the determination unit 14 may further determine that the sensor 20 that is not operating in the detection system 1 is operated by the read method. The instruction unit 15 transmits instruction information for changing the operation method of each sensor 20 to the sensor 20 based on the determination by the determination unit 14. When the instruction information is received by the reception unit 23 of each sensor 20, the operation control unit 24 of the sensor 20 controls the operation method according to the instruction information.

In step S6, the determination unit 14 determines whether or not the data loss frequency of the sensors 20 operating in all periodic methods is equal to or higher than a predetermined threshold value. When it is determined that the data loss frequency of the sensors 20 operating in all the periodic methods is equal to or higher than a predetermined threshold value, the process returns to step S5, and the acquisition frequency of the detected data in the entire system is further increased. On the other hand, when it is determined that the data loss frequency of all the sensors 20 operating in the periodic method is equal to or higher than a predetermined threshold value, that is, the sensor 20 of at least one of the plurality of sensors 20 operating in the periodic method is used. If the data loss frequency is less than a predetermined threshold, the process proceeds to step S7.

In step S7, the determination unit 14 determines that the operation method of any one of the plurality of sensors 20 operating in the periodic method is changed to the trigger method. Here, the determination unit 14 may further determine that the operation method of the sensor 20 operating by the trigger method is changed to the lead method. Further, the determination unit 14 may further determine that the operation of the sensor 20 operating by the lead method is stopped. The instruction unit 15 transmits instruction information for changing the operation method of each sensor 20 to the sensor 20 based on the determination by the determination unit 14. When the instruction information is received by the reception unit 23 of each sensor 20, the operation control unit 24 of the sensor 20 controls the operation method according to the instruction information.

In step S8, the detection system 1 determines whether or not to end the detection of the status of the detection target based on the instruction input to the detection system 1. If it is determined that the detection of the status of the detection target is finished, the process ends. On the other hand, if it is not determined that the detection of the status of the detection target is finished, the process returns to step S2.

Next, a detection program for making the computer function as the terminal 10 of the present embodiment will be described. FIG. 8 is a diagram showing the configuration of the detection program P1.

The detection program P1 includes a main module m10, an acquisition module m11, a calculation module m12, a threshold value setting module m13, a determination module m14, and an instruction module m15 that collectively control the detection process in the terminal 10. Then, each module m11 to m15 realizes each function for the acquisition unit 11, the calculation unit 12, the threshold value setting unit 13, the determination unit 14, and the instruction unit 15 in the terminal 10. The detection program P1 may be transmitted via a transmission medium such as a communication line, or may be stored in the recording medium M1 as shown in FIG.

In the terminal 10, the detection method, and the detection program P1 of the present embodiment described above, the sensor operating in the periodic method is included in the detection system 1 including the sensor 20 operating in any of the periodic method and the trigger method and the read method. When the data loss frequency in 20 is equal to or higher than a predetermined threshold value, the operation method of the sensor 20 operating in the trigger method (or read method) in which the transmission frequency of the detected data is lower than that in the periodic method is changed to the periodic method. As a result, when the frequency of data loss is low, the sensor 20 is operated by an operation method with low power consumption, so that the power consumption can be reduced. Further, when the data loss frequency is high, the sensor 20 is operated by an operation method in which the detection data is acquired more frequently, so that sufficient detection data is acquired to grasp the situation of the detection target.

Further, the detection device according to another embodiment sets a predetermined threshold value regarding the data loss frequency of the sensor based on the received signal strength indicating the strength of the signal received from the sensor in the detection device, and the received signal strength is high. It may be further provided with a threshold value setting unit that sets a predetermined threshold value as low as possible.

The number of detection data expected to be acquired per unit time varies depending on the received signal strength. According to the above embodiment, the higher the received signal strength, the lower the predetermined threshold value regarding the data loss frequency is set, so that an appropriate operation method can be determined.

Further, in the detection device according to another embodiment, when at least two or more sensors among the plurality of sensors are operating by the first operation method, among the sensors operating by the first operation method. When the data loss frequency of at least one sensor is less than a predetermined threshold value, the determination unit determines the operation method of any one of the at least two or more sensors operating in the first operation method. It may be determined to change to the operation method.

According to the above embodiment, when the data loss frequency of at least one of the plurality of sensors operating in the first operation method for acquiring the detection data with high frequency is less than a predetermined threshold value, the detection is performed. Since it can be considered that a sufficient number of detection data has been acquired to grasp the situation of the target, the operation method of one of the plurality of sensors operating in the first operation method may be used as the operation method of the other sensor. By changing to the operation method, it is possible to reduce power consumption while maintaining the acquisition of a sufficient number of detection data.

Further, in the detection device according to another embodiment, the determination unit is a sensor of at least one of the non-operating sensors when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value. May be determined to operate by another operation method.

According to the above embodiment, when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the number of detected data acquired in the entire system may not be sufficient. In such a case, the number of detection data acquired by the entire system can be complemented by operating the non-operating sensor by another operation method.

Further, in the detection device according to another form, the first operation method may be an operation method in which the sensor transmits the detection data to the detection device at a predetermined fixed time interval.

According to the above embodiment, the detection data can be acquired with high frequency in the sensor operated by the first operation method.

Further, in the detection device according to another embodiment, the other operation method includes the second operation method and the third operation method in which the frequency of transmission of the detection data is lower than that of the second operation method, and the determination unit is the second operation method. When the data loss frequency of the sensor operating in the first operating method is equal to or higher than a predetermined threshold value, the operating method of at least one of the sensors operating in the third operating method is changed to the second operating method. It may be determined that this is the case.

According to the above embodiment, when the data loss frequency in the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the sensor operates in the third operation method in which the detection data transmission frequency is lower than that in the second operation method. The operation method of the sensor is changed to the second operation method. As a result, when the data loss frequency is low, the sensor is operated by the operation method with low power consumption, so that the power consumption can be reduced, and when the data loss frequency is high, it is detected more frequently. Since the sensor is operated by the operation method in which the data is acquired, the number of detected data for grasping the situation of the detection target is complemented.

Further, in the detection device according to another embodiment, the second operation method is a predetermined setting set in advance when a predetermined change appears in the detection value by the sensor or after the detection data is transmitted from the sensor to the detection device. This is an operation method in which the sensor transmits the detection data to the detection device when the time has elapsed, and the third operation method is an operation in which the sensor transmits the detection data to the detection device in response to a request from the detection device. In the third operation method, the detection device may transmit a request to the sensor based on the surrounding environment information acquired by the detection device in relation to the detection target of the sensor.

According to the above embodiment, in the sensor operated by the second operation method, the detection data is transmitted to the detection device at a predetermined timing with a lower frequency than that of the first operation method, so that the situation of the detection target can be grasped. Acquisition of necessary detection data and reduction of power consumption are compatible. In the sensor that operates by the third operation method, the detection data is transmitted to the detection device only when it is determined that the detection device needs to acquire the detection data based on the surrounding environment information about the detection target. The detection data necessary for grasping the situation can be reliably acquired and the power consumption can be reduced.

Further, in the detection device according to another embodiment, when at least two or more sensors among the plurality of sensors are operating by the first operation method, among the sensors operating by the first operation method. When the data loss frequency of at least one sensor is less than a predetermined threshold value, the determination unit changes the operation method of at least one of the sensors operating in the second operation method to the third operation method. It may be determined to change.

According to the above embodiment, when the data loss frequency of at least one of the plurality of sensors operating in the first operation method for acquiring the detection data with high frequency is less than a predetermined threshold value, the detection is performed. Since it can be considered that a sufficient number of detection data has been acquired to grasp the situation of the target, the operation method of any one of the plurality of sensors operating in the second operation method is used as the third operation method. By changing to the operation method of, it is possible to reduce power consumption while maintaining the acquisition of a sufficient number of detection data.

Further, in the detection device according to another embodiment, the determination unit determines the detection data acquired from the plurality of sensors by the detection device when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value. When the number is less than a predetermined number, it may be determined that the operation method of the sensor operating by another operation method is changed.

According to the above embodiment, when the number of detection data acquired by the detection device from a plurality of sensors is less than a predetermined number, the operation method of the sensor operating in another operation method is changed. It is possible to acquire the detection data necessary for grasping. On the other hand, if the number of detection data acquired by the detection device from a plurality of sensors is not less than a predetermined number, it is considered that a sufficient number of detection data has been acquired to grasp the status of the detection target, and the power consumption is high. Since no change to a higher operating method is made, an increase in power consumption is prevented.

Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered Trademarks), GSM (Registered Trademarks), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), It may be applied to Bluetooth®, other systems that utilize suitable systems and / or next-generation systems that are extended based on them.

The processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in the present specification may be rearranged in order as long as there is no contradiction. For example, the methods described herein present elements of various steps in an exemplary order and are not limited to the particular order presented.

Information and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information and the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information to be input / output may be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present specification may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, and the like may be transmitted and received via a transmission medium. For example, the software may use wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave to website, server, or other. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described herein and / or the terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings.

The terms "system" and "network" used herein are used interchangeably.

Further, the information, parameters, etc. described in the present specification may be represented by an absolute value, a relative value from a predetermined value, or another corresponding information. ..

The phrase "based on" as used herein does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

As used herein by designations such as "first", "second", etc., any reference to that element does not generally limit the quantity or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

As long as "include", "including", and variations thereof are used herein or within the scope of the claims, these terms are similar to the term "comprising". In addition, it is intended to be inclusive. Moreover, the term "or" as used herein or in the claims is intended to be non-exclusive.

In the present specification, a plurality of devices shall be included unless the device has only one device apparently in context or technically.

The entire disclosure is intended to include more than one, unless the context clearly indicates the singular.

1 ... Detection system, 10 ... Terminal, 11 ... Acquisition unit, 12 ... Calculation unit, 13 ... Threshold setting unit, 14 ... Judgment unit, 15 ... Indicator unit, 16 ... Detection data storage unit, 20 ... Sensor, 21 ... Detection unit , 22 ... Transmitter, 23 ... Receiver, 24 ... Operation control, IN ... Internet, M1 ... Recording medium, m10 ... Main module, m11 ... Acquisition module, m12 ... Calculation module, m13 ... Threshold setting module, m14 ... Judgment Module, m15 ... instruction module, N ... network, P1 ... detection program.

Claims (9)

It is a detection device that acquires detection data from a plurality of sensors driven by a battery and controls the operation of the sensors.
An acquisition unit that acquires the detection data from the plurality of sensors,
A calculation unit that calculates the frequency of data loss, which indicates the frequency of occurrence of the event that the detection data transmitted from the sensor operating in the first operation method was not acquired by the acquisition unit.
The operation method in the plurality of sensors is determined based on the data loss frequency of each sensor, and when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the first method is used. A determination unit that determines that the operation method of at least one of the sensors operating in another operation method that transmits detection data at a lower frequency than the operation method is changed to the first operation method.
It is provided with an instruction unit for transmitting instruction information for changing the operation method of each sensor based on the determination by the determination unit .
When the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the determination unit may use the other operation method for at least one of the non-operating sensors. Judging to operate,
Detection device. A predetermined threshold value regarding the data loss frequency of the sensor is set based on the received signal strength indicating the strength of the signal received by the detection device, and the higher the received signal strength, the lower the predetermined threshold value. It also has a threshold setting unit to set.
The detection device according to claim 1. When at least two or more sensors among the plurality of sensors are operating by the first operation method, the data loss of at least one sensor among the sensors operating by the first operation method is the data loss. When the frequency is less than a predetermined threshold value, the determination unit changes the operation method of any one of at least two or more sensors operating in the first operation method to the other operation method. Judging to do,
The detection device according to claim 1 or 2. The other operation method includes a second operation method and a third operation method in which the frequency of transmission of detection data is lower than that of the second operation method.
The determination unit operates the operation method of at least one of the sensors operating in the third operation method when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value. Is determined to be changed to the second operation method.
The detection device according to any one of claims 1 to 3 . The second operation method is when a predetermined change appears in the value detected by the sensor, or when a predetermined predetermined time elapses after the detection data is transmitted from the sensor to the detection device. In addition, it is an operation method in which the sensor transmits the detection data to the detection device.
The third operation method is an operation method in which the sensor transmits the detection data to the detection device in response to a request from the detection device, and in the third operation method, the detection device is a method. The request is transmitted to the sensor based on the surrounding environment information acquired by the detection device in relation to the detection target of the sensor.
The detection device according to claim 4 . When at least two or more sensors among the plurality of sensors are operating by the first operation method, the data loss of at least one sensor among the sensors operating by the first operation method is the data loss. When the frequency is less than a predetermined threshold value, the determination unit may change the operation method of at least one of the sensors operating in the second operation method to the third operation method. judge,
The detection device according to claim 4 or 5 . In the determination unit, when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the number of the detection data acquired by the detection device from the plurality of sensors is less than a predetermined number. If, it is determined that the operation method of the sensor operating in the other operation method is changed.
The detection device according to any one of claims 1 to 6 . A detection system including a plurality of sensors and detection devices driven by a battery, wherein the detection devices acquire detection data from the plurality of sensors.
The sensor is
Equipped with an operation control unit that controls the operation method of the sensor.
It operates by one of the first operation method and another operation method different from the first operation method.
The first operation method transmits detection data to the detection device at a higher frequency than the other operation methods.
The detection device is
An acquisition unit that acquires the detection data from the plurality of sensors,
A calculation unit for calculating the data loss frequency indicating the frequency of occurrence of an event that the detection data transmitted from the sensor operating by the first operation method was not acquired by the acquisition unit, and a calculation unit.
The operation method in the plurality of sensors is determined based on the data loss frequency of each sensor, and when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the other operation is performed. A determination unit that determines that the operation method of at least one of the sensors operating by the method is changed to the first operation method.
It is provided with an instruction unit for transmitting instruction information for changing the operation method of each sensor based on the determination by the determination unit.
When the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the determination unit may use the other operation method for at least one of the non-operating sensors. Judging to operate,
The motion control unit of the sensor operates the sensor by an operation method according to an instruction from the instruction unit.
Detection system. A detection program that allows a computer to acquire detection data from a plurality of battery-powered sensors and function as a detection device that controls the operation of the sensors.
The detection program is applied to the computer.
An acquisition function for acquiring the detection data from a plurality of the sensors, and
A calculation function for calculating the frequency of data loss indicating the frequency of occurrence of an event that the detection data transmitted from the sensor operating in the first operation method was not acquired by the acquisition function, and a calculation function.
The operation method in the plurality of sensors is determined based on the data loss frequency of each sensor, and when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, the first operation method is determined. A determination function for determining that the operation method of at least one of the sensors operating in another operation method that transmits detection data at a lower frequency than that of the first operation method is changed to the first operation method.
Based on the judgment by the judgment function, the instruction function for transmitting the instruction information for changing the operation method of each sensor to each sensor is realized .
In the determination function, when the data loss frequency of the sensor operating in the first operation method is equal to or higher than a predetermined threshold value, at least one of the non-operating sensors is used in the other operation method. Judging to operate,
Detection program.

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