JP7516162B2 - Electronic device and operation control method - Google Patents

Description

The present invention relates to an electronic device and an operation control method.

Recently, IoT (Internet of Things) using sensing technology has been attracting attention. With IoT, various sensors are used to collect and analyze data, making it possible to use it for a variety of use cases, such as watching over children, checking the safety of elderly people, or tracking logistics systems.

In the IoT, for example, electronic devices that have functions such as sensors and are battery-powered may be used. In electronic devices that use batteries as a power source, a voltage drop (or drop voltage, hereafter referred to as "voltage drop") occurs according to the current consumed by the electronic device due to the internal resistance of the battery.

It is known that this voltage drop can be greater, for example, when the temperature of the battery or its surroundings is below a certain temperature than when it is higher than the certain temperature.

On the other hand, in electronic devices, a shutdown voltage is set to deal with voltage drops. For example, if the voltage drops below the shutdown voltage, the power to the electronic device is shut down (or the power is cut off). Setting the shutdown voltage makes it possible, for example, to perform a minimum level of operation for the electronic device.

Patent document 1 describes a battery remaining charge determination device that determines the remaining charge level by determining a correction value based on the battery temperature and the current remaining charge level from a sub-table corresponding to the additional function being operated, and adding the determined correction value to the measured battery voltage.

Patent document 2 also describes a communications terminal that stops only the wireless communications function of the wireless communications unit when it is determined that the acquired battery voltage is equal to or lower than a communications stop voltage that indicates the minimum voltage at which wireless communications performance can be ensured.

JP 2001-126778 A JP 2014-175875 A

However, in Patent Document 2, the communication stop voltage is set higher than the shutdown voltage without taking temperature into consideration.

As mentioned above, the magnitude of the battery voltage drop is smaller at high temperatures above a predetermined temperature than at low temperatures below the predetermined temperature. Therefore, in Patent Document 2, when the battery or ambient temperature is high, even if the battery voltage drop falls below the communication stop voltage, the battery may still have a voltage capacity sufficiently higher than the shutdown voltage remaining. Even in such cases, Patent Document 2 controls the battery so that wireless communication does not operate. Since wireless communication may be possible if there is a voltage sufficiently higher than the shutdown voltage, Patent Document 2 cannot be said to effectively utilize the battery capacity of the communication terminal.

In addition, Patent Document 1 only determines the remaining battery level, and does not disclose any method for effectively utilizing the battery capacity of the communication terminal.

Therefore, the present invention aims to provide an electronic device and an operation control method that can effectively utilize the battery capacity.

The electronic device according to the first aspect includes a temperature sensor that detects the temperature of the battery, a voltage sensor that detects the battery voltage of the battery, and a controller. The controller determines whether or not the electronic device is to operate based on a threshold value that can take different values based on the temperature detected by the temperature sensor and the operation of the electronic device, and the battery voltage detected by the voltage sensor.

The operation control method according to the second aspect is an operation control method for an electronic device driven by a battery having a temperature sensor and a voltage sensor, and includes a step of detecting the temperature of the battery by the temperature sensor, a step of detecting the battery voltage of the battery by the voltage sensor, and a step of determining whether the electronic device is operating. The step of determining whether the electronic device is operating determines whether the electronic device is operating according to a threshold value that can take different values based on the temperature detected by the temperature sensor and the operation of the electronic device, and the battery voltage detected by the voltage sensor.

According to one aspect of the present invention, it is possible to provide an electronic device and an operation control method that enable effective use of battery capacity.

FIG. 1 is a diagram illustrating a configuration of a communication system according to an embodiment. FIG. 1 is a diagram illustrating a configuration of an electronic device according to an embodiment. FIG. 13 illustrates an example of operational thresholds according to an embodiment. FIG. 11 is a diagram illustrating an example of an operational threshold value during a transmission operation according to an embodiment. FIG. 11 is a diagram showing an example of an operational threshold value during GNSS operation according to an embodiment; FIG. 11 is a diagram showing an example of operation thresholds for each operation at a temperature of 10° C. or higher according to an embodiment. FIG. 11 is a diagram illustrating an example of a presetting operation according to an embodiment. FIG. 11 is a diagram illustrating an example of a normal operation according to an embodiment.

The embodiments will be described with reference to the drawings. In the description of the drawings, the same or similar parts are given the same or similar reference numerals.

(Configuration of communication system)
First, a configuration of a communication system according to an embodiment will be described. Fig. 1 is a diagram showing a configuration of a communication system 1 according to an embodiment.

As shown in FIG. 1, the communication system 1 includes an electronic device 100, a communication network 200, a server 300, and a terminal 400.

The electronic device 100 according to one embodiment is a portable electronic device that has a communication function and is battery-powered. For example, the electronic device 100 is a small electronic device used for sensing purposes such as remote monitoring. Such an electronic device 100 may be called an IoT device.

The electronic device 100 has a configuration that allows the user to customize the type of sensor used for sensing in order to be compatible with various sensing-related services. For example, the electronic device 100 has a configuration that allows the sensor 170 to be attached and detached. This makes it possible to provide an electronic device 100 that is highly versatile and inexpensive. Note that "detachable" does not only mean that the sensor 170 can be physically attached (mounted) and detached from the electronic device 100, but also means that the sensor 170 can be electrically connected and disconnected from the electronic device 100 via a cable or the like.

The electronic device 100 performs wireless communication with a base station 201 included in the communication network 200. For example, the electronic device 100 performs wireless communication of a low power wide area (LPWA) system. The LPWA system is a wireless communication system that realizes long-distance communication while suppressing power consumption. The LPWA system is, for example, a cellular LPWA, Sigfox, or LoRaWAN. The cellular LPWA may be an enhanced machine type communications (eMTC) or a narrow band-Internet of Things (NB-IoT) defined in the ^3rd generation partnership project (3GPP) standard. The electronic device 100 may perform wireless communication using a short-range wireless communication method such as wireless LAN or Bluetooth (registered trademark).

The communication network 200 includes a base station 201 that performs wireless communication with the electronic device 100. The communication network 200 includes at least one of a wide area network (WAN) and a local area network (LAN). The communication network 200 may further include the Internet.

The server 300 is connected to the communication network 200. The server 300 manages the electronic device 100 by communicating with the electronic device 100 via the communication network 200. For example, the server 300 performs various settings on the electronic device 100 and collects measurement data obtained by the sensor 170 from the electronic device 100.

The terminal 400 accesses the server 300 via the communication network 200. For example, the terminal 400 displays a setting screen for performing various settings on the electronic device 100, and displays measurement data collected by the server 300 on the screen.

(Configuration of Electronic Device)
Next, a description will be given of the configuration of the electronic device 100 according to an embodiment of the present invention.

2, the electronic device 100 has an antenna 110, a communication module 120, a controller 130, a storage 140, a battery 150, a voltage sensor 151, a temperature sensor 152, a sensor interface 160, and a power button 165. The battery 150 may be detachable from the electronic device 100, and the battery 150 may not be provided in the electronic device 100 when the electronic device 100 is shipped.

Antenna 110 is used to transmit and receive radio signals.

The communication module 120 performs amplification and filtering on the radio signal received by the antenna 110, converts (down-converts) the radio signal into a baseband signal, and outputs it to the controller 130. The communication module 120 also converts (up-converts) the baseband signal output from the controller 130 into a radio signal, performs amplification and other processing, and transmits it from the antenna 110. The communication module 120 can perform these processes for each wireless communication method, such as the above-mentioned LPWA method, wireless LAN, or Bluetooth (registered trademark). Therefore, the communication module 120 may include multiple communication modules that are different for each wireless communication method.

The controller 130 performs various processes and controls in the electronic device 100. The controller 130 may include a baseband processor and a CPU (Central Processing Unit). The baseband processor performs modulation/demodulation and encoding/decoding of baseband signals. The CPU executes programs stored in the storage 140 to perform various processes.

In addition, the controller 130 executes the programs stored in the storage 140 to realize the functions of applications, device drivers, middleware, and the OS (Operating System).

Storage 140 includes volatile memory and non-volatile memory. Storage 140 stores programs executed by controller 130 and information used in processing by controller 130. Storage 140 prestores the programs for applications, device drivers, middleware, and the OS.

Battery 150 is a primary battery or a secondary battery, and supplies power to drive electronic device 100. For example, battery 150 is a primary battery such as an alkaline dry battery or a manganese dry battery. Such primary batteries experience a larger drop in battery voltage when current consumption increases, compared to secondary batteries such as lithium ion batteries or nickel cadmium batteries.

The voltage sensor 151 detects the battery voltage, which is the voltage of the battery 150, and outputs the detection result to the controller 130. The voltage sensor 151 may be integrated with the controller 130.

The temperature sensor 152 detects the temperature of the battery 150 or its surroundings and outputs the detection result to the controller 130. The temperature sensor 152 may be integrated with the controller 130.

The current sensor 153 measures the current consumption of the battery 150. The current sensor 153 outputs the measured current consumption to the controller 130. The current sensor 153 may also be integrated with the controller 130.

The sensor interface 160 is an interface to which the sensor 170 is electrically connected. For example, the sensor interface 160 is configured to comply with any one of the Universal Serial Bus (USB) standard, the Universal Asynchronous Receiver/Transmitter (UART) standard, or the Inter-Integrated Circuit (I2C) standard. The sensor interface 160 may be connected to the sensor 170 without a cable. The sensor interface 160 has multiple ports 161a, 161b, .... An individual sensor 170 is electrically connected to each port.

The sensor 170 that can be connected to the sensor interface 160 is, for example, at least one of a temperature sensor 171, a humidity sensor 172, a position sensor 173, an acceleration sensor 174, a geomagnetic sensor 175, an illuminance sensor 176, an atmospheric pressure sensor 177, and a gyro sensor 178. The user of the electronic device 100 purchases a sensor 170 according to his or her needs as necessary, and attaches this sensor 170 to the electronic device 100. The sensor 170 attached to the electronic device 100 can be removed or replaced by the user.

The temperature sensor 171 is a sensor that detects temperature and outputs temperature data. The humidity sensor 172 is a sensor that detects humidity and outputs humidity data. The position sensor 173 is a sensor that detects position and outputs position data. For example, the position sensor 173 is configured to include a GNSS receiver. The acceleration sensor 174 is a sensor that detects acceleration and outputs acceleration data. The acceleration sensor 174 may be a uniaxial acceleration sensor or a multiaxial acceleration sensor. The geomagnetic sensor 175 is a sensor that detects geomagnetism and outputs geomagnetic data. The illuminance sensor 176 is a sensor that detects illuminance and outputs illuminance data. The atmospheric pressure sensor 177 is a sensor that detects atmospheric pressure and outputs atmospheric pressure data. The gyro sensor 178 is a sensor that detects angular velocity and outputs angular velocity data.

In this embodiment, the controller 130 determines whether or not the electronic device 100 is operating based on a threshold value that can take different values based on the temperature detected by the temperature sensor 152 and the operation of the electronic device 100, and the battery voltage detected by the voltage sensor 151.

Figure 3 shows an example of a threshold value (or operating threshold value; hereafter sometimes referred to as "threshold value") in this embodiment.

Figure 3 shows different thresholds for each operation ("transmission", "GNSS positioning", "sensor A operation", and "sensor B operation") and for each temperature. With regard to temperature, Figure 3 shows "below -10°C", "-10°C to 0°C" (= greater than -10°C and less than 0°C), "0 to 10°C" (= greater than 0°C and less than 10°C), and "above 10°C".

Figure 4 shows the thresholds for each temperature when focusing on the "transmission" operation in Figure 3. In Figure 4, the vertical axis represents "battery voltage" and the horizontal axis represents "time."

As shown in Figure 4, the highest threshold is 2.9V when the temperature is -10°C or lower, and the lowest thresholds are 0 to 10°C and 10°C or higher. This takes into consideration the fact that the amount of voltage drop is greater when the temperature is, for example, below a certain temperature (hereinafter sometimes simply referred to as "low temperature") than when the temperature is higher than the certain temperature (hereinafter sometimes simply referred to as "high temperature").

In other words, if the amount of voltage drop is large, it is expected that the battery voltage due to the voltage drop will be lower than the shutdown voltage. If this is expected in electronic device 100, it is possible to set the low temperature threshold higher than the high temperature threshold in advance, so that the operation can be restricted immediately when the battery voltage falls below that threshold. This makes it possible, for example, to restrict the target operation and prevent electronic device 100 from shutting down (or cutting off the power, hereafter referred to as "shutdown"), thereby preventing operations other than that operation from being able to be used.

In the example shown in Figure 4, the shutdown voltage is set to 2.0 V.

For example, consider the following case. That is, consider the case where the threshold value during "transmission" operation is uniformly fixed at "2.9V". Also consider the case where the battery voltage changes as shown in FIG. 4 when a transmission operation is performed at room temperature (for example, "10°C"). In this case, the battery voltage falls below the threshold value of "2.9V" due to a voltage drop. Therefore, it is possible to restrict the electronic device 100 from performing a "transmission operation". However, even if the battery voltage falls below the threshold value of "2.9V", there is still sufficient battery capacity remaining up to the shutdown voltage. In the electronic device 100, it is possible to use this remaining battery capacity to perform a "transmission" operation or even other operations.

Therefore, if a fixed threshold of "2.9V" is used across the board to regulate transmission operations, it cannot necessarily be said that the battery capacity of the electronic device 100 is being used effectively.

In contrast to this, in this embodiment, as shown in FIG. 4, different thresholds can be set depending on the temperature detected by the temperature sensor 152. For example, when the detected temperature is "10°C", the threshold can be set to "2.4V". If the voltage transition during a transmission operation is, for example, as shown in FIG. 4, the voltage due to the voltage drop will not fall below the threshold value of "2.4V". In this case, the electronic device 100 can perform the transmission operation without restricting the transmission operation.

In this way, in the electronic device 100 of this embodiment, a threshold value is set according to the temperature, and the electronic device 100 can determine whether or not to operate according to the threshold value, compared to when the threshold value is set uniformly to "2.9V." Therefore, the electronic device 100 of this embodiment can make effective use of the battery capacity.

Figure 5 shows a summary of the thresholds for each temperature when focusing on the "GNSS positioning" operation in Figure 3.

In the case of Figure 5, as in the case of Figure 4, different thresholds are set for each temperature, with the highest threshold being "-10°C or less" and the lowest thresholds being "0 to 10°C" and "10°C or more."

When the voltage transition during GNSS operation at room temperature (e.g., 10°C) is as shown in FIG. 5, the battery voltage due to the voltage drop does not fall below the threshold value of 2.4V at a temperature of 10°C. In this case, the electronic device 100 is able to perform GNSS operation without restricting it. In this case, if the threshold value is uniformly set to 2.8V at low temperatures (e.g., below -10°C), GNSS operation is restricted.

Therefore, the electronic device 100 in this embodiment can effectively utilize the battery capacity of the battery 150 during "GNSS positioning" operation, just as it can during "transmission" operation.

This also applies to other operations, such as "sensor A operation" and "sensor B operation" as shown in Figure 3.

In addition, the electronic device 100 in this embodiment can set different thresholds for each operation.

Figure 6 shows an example of thresholds for each operation when focusing on a temperature of "10°C or higher" as shown in Figure 3.

As shown in Figure 6, when the temperature is "10°C or higher," the thresholds for "transmission" and "GNSS positioning" operations are the highest at "2.4 V," the threshold for "sensor A" operation is "2.3 V," and the threshold for "sensor B operation" is the lowest at "2.1 V." This is because it takes into account that "transmission" and "GNSS positioning" operations consume the largest amount of current compared to other operations.

That is, when the current consumption is large and the voltage drop is large, it is expected that the battery voltage of the battery 150 will fall below the shutdown voltage. In such a case, the electronic device 100 can prevent, for example, a situation in which other operations become unavailable due to a shutdown by restricting such operations as soon as the voltage falls below the threshold.

For example, consider a case where the threshold is uniformly set to "2.4V" and "sensor B" operation is performed. Also consider a case where the voltage transition when "sensor B" operation is performed is as shown in Figure 6. In this case, a voltage drop causes the battery voltage of battery 150 to fall below the threshold value of "2.4V", and therefore "sensor B" operation is restricted. However, even if the battery voltage falls below the threshold value of "2.4V", battery 150 still has sufficient capacity up to the shutdown voltage. Therefore, in this case, it cannot necessarily be said that the battery capacity is being used effectively.

On the other hand, in this embodiment, in electronic device 100, different thresholds are set depending on the operation. In the example of FIG. 6, the threshold is "2.1V" in "sensor B" operation. In this case, if the voltage transition of battery 150 is as shown in FIG. 6, the battery voltage will not fall below the threshold "2.1V". Therefore, in electronic device 100, "sensor B" operation can be performed without being restricted. Therefore, it can be said that electronic device 100 in this embodiment makes effective use of the capacity of battery 150 compared to a case where the threshold is uniformly set to "2.4V".

(Example of electronic device operation)
Next, an example of the operation of the electronic device 100 according to an embodiment will be described. In this example, an example in which the electronic device 100 itself sets a threshold value as a pre-setting when a scenario is activated will be described. Next, an example of a control method for controlling each operation using the threshold value thus set will be described.

(Pre-setting)
FIG. 7 is a flowchart showing an example of the presetting operation.

The controller 130 of the electronic device 100 starts processing in step S10, and then in step S11 operates the connected sensor 170 according to the scenario.

A scenario is, for example, a representation of a setting procedure. A scenario indicates, for example, which sensor 170 is to be used, at what frequency, and using which wireless communication method (or communication module) to perform each operation (for example, "sensor 1" operation or "sensor 2" operation, etc.).

Such a scenario may be stored in advance in storage 140 at the time of shipment from the factory, or may be received from server 300 (e.g., FIG. 1) via network 200 or the like and stored in storage 140.

In step S11, for example, the following operation is performed. That is, the controller 130 receives a signal indicating the type of the connected sensor 170 from the sensor interface 160. Scenarios are stored in the storage 140, and when the controller 130 receives a signal indicating the type, it reads out the scenario corresponding to the connected sensor 170 from the storage 140. This enables the controller 130 to cause the connected sensor 170 to perform each operation (e.g., "sensor A" operation, "sensor B" operation, etc.) in accordance with the scenario.

Note that this scenario will be explained below assuming that it includes "transmission" operations, "GNSS positioning" operations, and other operations in addition to the operations performed by the connected sensor 170.

On the other hand, if the "transmission" operation and the "GNSS positioning" operation are not included in the scenario, for example, the following operation may be performed. That is, information that causes the "transmission" operation and the "GNSS positioning" operation to be performed when the scenario is activated is stored in the storage 140, and the controller 130 can execute such operations by reading this information in this operation (step S11).

In step S12, the current sensor 153 measures the current consumption for each communication module and for each connection sensor 170. That is, the current sensor 153 measures the current consumption in the electronic device 100 for each operation. In this case, the current sensor 153 measures the current consumption at room temperature (e.g., 10°C). The current sensor 153 may measure the current consumption multiple times under the same conditions. The current sensor 153 outputs the measured current consumption to the controller 130.

As described above, the scenario indicates, for example, which communication module (each communication module included in the communication module 120) is to be used and which connected sensor 170 is to be used. Therefore, the controller 130 can perform this processing for each communication module and each connected sensor 170 by processing according to the scenario.

In step S13, the controller 130 estimates the voltage drop value during low-temperature operation based on the peak current consumption value and the battery specifications.

For example, the controller 130 may operate as follows. That is, the controller 130 stores the current consumption measured multiple times by the current sensor 153 in the storage 140, and reads out from the storage 140 the current consumption that is the peak value. The controller 130 then uses a formula or table stored in the storage 140 to calculate or read out the voltage drop value that corresponds to the peak value of the current consumption, thereby estimating the voltage drop value during low-temperature operation.

The battery specifications include the type of battery (such as an alkaline battery or a lithium ion battery), the battery capacity, and the low-temperature characteristics of the battery. The voltage drop value according to such battery specifications may be stored, for example, in a formula or table in storage 140.

In step S14, the controller 130 calculates a threshold (or an operating threshold) for each operation and for each temperature based on the voltage drop value.

For example, storage 140 stores a table that stores thresholds for voltage drop values for each operation and each temperature. Controller 130 may use such a table to calculate a threshold for each operation and each temperature. Alternatively, storage 140 may store a formula that takes operation, temperature, and voltage drop value as input and outputs a threshold, and the threshold may be calculated using such a formula.

In step S15, the controller 130 stores the threshold calculated in step S14 in the storage 140. The threshold stored in the storage is, for example, the threshold shown in FIG. 3 above.

In step S16, the controller 130 ends the pre-set operation.

(Operation Control Method)
FIG. 8 is a diagram showing an example of the operation of the operation control method according to the present embodiment.

In step S20, the controller 130 starts the processing. For example, the controller 130 may start the processing when each action (e.g., the "send" action) according to the scenario is triggered.

In step S21, the controller 130 measures the battery voltage and temperature. The controller 130 measures the battery voltage and temperature by receiving the battery voltage (e.g., 2.7 V) detected by the voltage sensor 151 and the temperature (e.g., 8° C.) detected by the temperature sensor 152 from the voltage sensor 151 and the temperature sensor 152, respectively.

In step S22, the controller 130 reads from the storage 140 a threshold value (e.g., 2.4 V) corresponding to the temperature measured in step S21, and compares the read threshold value with the battery voltage measured in step S21 (e.g., 2.7 V) to determine whether the battery voltage is equal to or lower than the threshold value.

When the battery voltage is not below the threshold (or is greater than the threshold) (S22: NO), the controller 130 controls the electronic device 100 to perform the operation (or to continue the operation) in step S23. For example, in the above example ("transmit" operation, battery voltage is "2.7V", threshold is "2.4V"), the battery voltage is greater than the threshold (S22: NO), so the controller 130 causes the "transmit" operation to be performed.

Then, in step S24, the controller 130 ends the operation related to the motion control.

On the other hand, when the battery voltage is equal to or lower than the threshold (S22: YES), in step S25, the controller 130 controls the electronic device 100 so as not to perform that operation.

For example, if the battery voltage measured in step S21 is 2.3 V and the temperature is 8° C., the controller 130 will not allow the "transmit" operation to be performed because the voltage is below the threshold of 2.4 V.

Then, in step S24, the controller 130 ends the operation related to the motion control.

Other Embodiments
In the above-described embodiment, the "transmission" operation and the like have been described as an example of the operation. Examples of the operation may include, for example, a "standby" operation (which may be a standby operation for each communication module such as wireless LAN or Bluetooth (registered trademark)) or a "back-end device" operation. The "back-end device" operation is an operation related to a device that can be connected to the electronic device 100 as an add-on, and may be, for example, a "speaker ringing" operation, a "lamp lighting" operation, a "vibration" operation, and the like. That is, the operation in this embodiment may be any operation of the electronic device 100 that reduces (or consumes) the battery voltage of the battery 150.

In the above embodiment, the pre-setting (e.g., FIG. 7) has been described as being performed by the electronic device 100 itself when a scenario is activated. For example, the electronic device 100 may calculate threshold values for each temperature and each operation by measuring and calculating for each operation, regardless of the scenario. Or, for example, such threshold values may be stored in advance in the storage 140 at the time of shipment from the factory.

Furthermore, in the above-described embodiment, the examples of temperatures and thresholds shown in Figures 3 to 6 are merely examples. In other words, regarding the relationship between temperature and threshold, the threshold when the temperature is low should be a larger value than the threshold when the temperature is high, and the threshold when the temperature is high should be a smaller value than the threshold when the temperature is low.

Furthermore, the controller 130 may determine the threshold value based on the type of the connected sensor (or external sensor) 170. For example, when "sensor A" of the connected sensors 170 is connected, the controller 130 may set a threshold value for the operation of "sensor A," and when "sensor B" is connected, the controller 130 may set a threshold value for the operation of "sensor B."

Furthermore, in the above-described embodiment, the voltage sensor 151 and the temperature sensor 152 have been described as being pre-installed (at the time of shipment) in the electronic device 100. For example, the voltage sensor 151 and the temperature sensor 152 may be detachable, like the other sensors 170.

Furthermore, in the above embodiment, an example has been described in which the electronic device 100 has a wireless communication function. However, the electronic device 100 does not necessarily have to have a wireless communication function.

Furthermore, in the above embodiment, an example in which the battery 150 is a primary battery has been mainly described, but the battery 150 may also be a secondary battery.

A program may be provided that causes a computer to execute each process performed by the electronic device 100. The program may be recorded on a computer-readable medium. Using the computer-readable medium, it is possible to install the program on a computer. Here, the computer-readable medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, and may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

Functional units (circuits) that execute each process performed by electronic device 100 may be integrated, and at least a portion of electronic device 100 may be configured as a semiconductor integrated circuit (chip set, SoC).

Although the embodiments have been described in detail above with reference to the drawings, the specific configuration is not limited to the above, and various design changes can be made without departing from the spirit of the invention. In addition, the above examples can be combined to the extent that they are not inconsistent.

1: Communication system 100: Electronic device 110: Antenna 120: Communication module 130: Controller 140: Storage 150: Battery 151: Voltage sensor 152: Temperature sensor 153: Current sensor 160: Sensor interface 161a: Port 161b: Port 165: Power button 170: Sensor 171: Temperature sensor 172: Humidity sensor 173: Position sensor 174: Acceleration sensor 175: Geomagnetic sensor 176: Illuminance sensor 177: Atmospheric pressure sensor 178: Gyro sensor 200: Communication network 201: Base station 300: Server 400: Terminal

Claims (7)

An electronic device powered by a battery,
a temperature sensor for detecting a temperature of the battery;
a voltage sensor for detecting a battery voltage of the battery;
a controller that determines whether or not the electronic device is operating in accordance with a threshold value that can take different values based on the temperature detected by the temperature sensor and the operation of the electronic device, and the battery voltage detected by the voltage sensor ;
When the temperature is equal to or lower than a predetermined temperature, the threshold value is set to a higher value than when the temperature is higher than the predetermined temperature, and when the temperature is higher than the predetermined temperature, the threshold value is set to a lower value than when the temperature is equal to or lower than the predetermined temperature.
Electronics. The controller controls the electronic device so as not to operate the electronic device when the battery voltage is equal to or lower than the threshold, and controls the electronic device so as to operate the electronic device when the battery voltage is higher than the threshold.
2. The electronic device according to claim 1, In addition, it has storage,
the controller measures a current consumption in the electronic device for each operation of the electronic device, estimates a voltage drop value during operation of the electronic device at a temperature lower than a predetermined temperature based on a peak value of the measured current consumption and a specification of the battery, calculates the threshold value based on the estimated voltage drop value, and stores the calculated threshold value in the storage;
The controller reads out the threshold value stored in the storage and determines whether or not the electronic device is operating.
2. The electronic device according to claim 1, Further, a storage device is provided in which the threshold value is stored before shipment,
The electronic device according to claim 1 , wherein the controller reads out the threshold value stored in the storage and determines whether or not the electronic device is to operate. An electronic device powered by a battery,
a temperature sensor for detecting a temperature of the battery;
a voltage sensor for detecting a battery voltage of the battery;
a controller that determines whether or not the electronic device is operating according to a threshold value that may take different values based on the temperature detected by the temperature sensor and the operation of the electronic device, and the battery voltage detected by the voltage sensor;
a sensor interface to which an external sensor is electrically connected;
The operations include performing a measurement using the external sensor;
The controller determines the threshold value based on a type of the external sensor.
Electronics . 1. An operation control method for an electronic device that has a temperature sensor and a voltage sensor and is driven by a battery, comprising:
detecting a temperature of the battery by the temperature sensor and detecting a battery voltage of the battery by the voltage sensor;
determining whether or not the electronic device is operating according to a threshold value that may take different values based on the temperature detected by the temperature sensor and the operation of the electronic device, and the battery voltage detected by the voltage sensor;
When the temperature is equal to or lower than a predetermined temperature, the threshold value is set to a higher value than when the temperature is higher than the predetermined temperature, and when the temperature is higher than the predetermined temperature, the threshold value is set to a lower value than when the temperature is equal to or lower than the predetermined temperature.
Operation control method. An operation control method for an electronic device that has a temperature sensor, a voltage sensor, and an external sensor and is driven by a battery, comprising the steps of:
detecting a temperature of the battery by the temperature sensor and detecting a battery voltage of the battery by the voltage sensor;
determining whether or not the electronic device is operating according to a threshold value that can take different values based on the temperature detected by the temperature sensor and the operation of the electronic device, and the battery voltage detected by the voltage sensor;
Including,
The operations include performing a measurement using the external sensor;
The determining step includes determining the threshold value based on a type of the external sensor.
Operation control method.

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