JP5834753B2 - Sensor device and measurement system - Google Patents

Description

  The present invention relates to a sensor device, a measurement system, and the like.

  In recent years, various sensor devices for measuring exercise have been used due to an increase in health consciousness. For example, a daily exercise history is recorded using a pulse sensor device (for example, Patent Document 1) or a pedometer, and is used for health management.

JP 2009-61246 A

  When the daily exercise history is recorded as described above, information on the date and time of exercise is required. This date / time information is generally generated by the sensor device as the current date / time. Many sensor devices are of the type worn on the body in order to measure movement, and are therefore generally battery powered.

  When the user forgets to replace or charge the battery, there is a problem that the date and time information is returned to the initial value by the initialization process when the operation of the sensor device is stopped and the sensor device is started again. If the date / time information is reset, for example, the user will be bothered to reset the current date / time, or a date / time history that is not consistent with the previous history will be recorded. For example, in an exercise program that aims to achieve a goal by setting a period, if the user exercises as it is after the date and time information is reset, the exercise history is outside the target period of the program. If it does so, an exercise | movement history will not be recorded as data and will cause a user's willingness to exercise to be impaired.

  According to some aspects of the present invention, it is possible to provide a sensor device, a measurement system, and the like that can set time information having consistency with history information in the initialization process.

  One aspect of the present invention is a sensor unit that outputs sensor detection information, a time information output unit that outputs time information, a nonvolatile storage unit, and information that associates the sensor detection information and the time information. A processing unit that stores the history information in the non-volatile storage unit, and the processing unit reads the history information from the non-volatile storage unit in a system initialization process, and is included in the history information The present invention relates to a sensor device that sets the time information as system time information.

  According to one aspect of the present invention, the system time information is set based on the time information of the history information read from the nonvolatile storage unit in the initialization process. This makes it possible to set time information consistent with history information in the initialization process.

  Moreover, in one aspect of the present invention, the processing unit uses the latest time information in the time information included in the history information or time information obtained by elapse of a predetermined time from the latest time information. It may be set as information.

  In this way, when history information already exists, the latest time information in the history information or time information obtained by elapse of a predetermined time from the latest time information is used, so that the history information is consistent. Time information can be set.

  In the aspect of the invention, the processing unit may set a predetermined initial value as the time information of the system when the history information does not exist in the nonvolatile storage unit.

  In this way, when no history information exists, the system time information can be set to a predetermined initial value.

  Further, in one aspect of the present invention, the system includes a RAM that stores the time information from the time information output unit as time information of the system, and the processing unit is held in the RAM in the initialization process of the system. The time information may be set as the time information of the system.

  In one aspect of the present invention, the processing unit determines whether or not the time information held in the RAM is valid as time information of the system, and determines that the time information is valid. The time information held in the RAM may be set as the time information of the system.

  According to these aspects, when time information is held in the RAM before the start of the initialization process, the time information can be set in the initialization process using the held time information. This makes it possible to set time information that is closer to the actual time.

  In one aspect of the present invention, when the processing unit determines that the time information held in the RAM is not valid as the time information of the system, the processing unit obtains the history information from the nonvolatile storage unit. The time information included in the history information may be set as system time information.

  In this way, even if the time information in the RAM 40 is destroyed due to, for example, a drop in power supply voltage, the time information can be set using the time information in the history information.

  In the aspect of the invention, the processing unit may determine that the time information of the system is valid when the time information stored in the RAM is within a predetermined time range. .

  In this way, when the time information held in the RAM is within a predetermined time range, it can be determined that the time information is not valid, and the system time information can be set using the time information.

  In one aspect of the present invention, the processing unit sets the system to a power saving mode (energy saving mode) when the power supply voltage of the system is lower than a predetermined voltage, and the processing unit performs the processing in the power saving mode. The unit may stop acquiring the history information, and the time information output unit may continue outputting the time information to the RAM.

  In this way, after the power supply voltage drops and the power saving mode is set, the system time information can be continuously updated for as long as possible while suppressing power consumption. Thereby, time information closer to the actual date and time can be set in the initialization process.

  In another aspect of the present invention, a sensor unit that outputs sensor detection information, a time information output unit that outputs time information, a nonvolatile storage unit, and information that associates the sensor detection information with the time information Is stored in the nonvolatile storage unit as history information, and the RAM stores the time information from the time information output unit as time information of the system. In the system initialization process, the present invention relates to a sensor device that sets the time information held in the RAM as the time information of the system.

  In another aspect of the present invention, a sensor unit that outputs sensor detection information, a time information output unit that outputs time information, a nonvolatile storage unit, and information that associates the sensor detection information with the time information Is stored in the nonvolatile storage unit as history information, and the history information stored in the nonvolatile storage unit is acquired, and display data of measurement results is obtained based on the acquired history information. A display data generation unit for generating, in the initialization process of the system, the processing unit reads the history information from the nonvolatile storage unit, and converts the time information included in the history information into a system time It relates to the measurement system set as information.

  In another aspect of the present invention, the display data generation unit uses the history information in which the time information associated with the sensor detection information is within a measurement period among the acquired history information. Data for displaying the measurement result may be generated.

  In this way, for example, when the measurement period of the service provided by the measurement system is determined, in the initialization process of the sensor device, the time information is set based on the history information and the RAM time information, Measurement results within the measurement period can be measured without manually setting time information.

The structural example of the sensor apparatus of this embodiment. The flowchart of the time information setting process in an initialization process. The structural example of the measurement system of this embodiment. The example of the display image displayed by a measurement system. Explanatory drawing of operation | movement of the sensor apparatus in a measurement process. Explanatory drawing of operation | movement of the sensor apparatus in an initialization process. Explanatory drawing of operation | movement of the sensor apparatus in an initialization process. Operation | movement explanatory drawing of the sensor apparatus in power saving mode. The structural example of a pulse sensor apparatus. The structural example of a pulse sensor apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are indispensable as means for solving the present invention. Not necessarily.

1. Sensor Device FIG. 1 shows a configuration example of the sensor device of the present embodiment. The sensor device includes a microprocessor 10, a sensor unit 20, a flash memory 30 (nonvolatile storage unit in a broad sense), a RAM 40 (Random Access Memory, volatile storage unit in a broad sense), a voltage drop detection unit 50, a communication unit. 60 and a display unit 70. Note that the present embodiment is not limited to the configuration shown in FIG. 1, and various modifications such as omitting some of the components or adding other components are possible.

  The microprocessor 10 is constituted by an MPU, for example, and executes programs for controlling each part of the sensor device and performing various data processing. The microprocessor 10 includes a processing unit 11 and a time information output unit 12.

  The processing unit 11 executes the above-mentioned program, for example, data processing of sensor detection results from the sensor unit 20, writing of history information to the flash memory 30, communication processing with a PC via the communication unit 60, sensor device The initialization process is performed.

  The time information output unit 12 outputs date and time information (time information in a broad sense) for use in time display and history information. For example, the time information output unit 12 is configured by a counter that counts elapsed date and time and elapsed time, minutes, and seconds from the initial date and time, and outputs the count value of the counter as date and time information.

  The sensor unit 20 senses the user's biological information and exercise information and outputs a sensor detection result. The sensor unit 20 includes, for example, a sensor (not shown) and an A / D conversion unit. The A / D conversion unit A / D converts an analog signal output from the sensor, and the sensor unit 20 performs A / D conversion. Output a digital signal as a sensor detection result. For example, the sensor unit includes an infrared sensor, an acoustic sensor, an acceleration sensor, a blood glucose sensor, and the like, and performs sensing of pulse information, blood pressure information, step count information, blood glucose level information, and the like.

  The flash memory 30 is a memory that holds stored data regardless of whether the power is on or off, and is used for storing various data. For example, exercise history information data, user setting information data (for example, weight, sex, age, etc.) and the like are written in the flash memory 30 by the microprocessor 10. The flash memory 30 stores various program data executed by the microprocessor 10.

  The RAM is a memory used for temporary data storage, and is composed of, for example, SRAM or DRAM. For example, the RAM is used as a working memory when the microprocessor 10 executes a program. Further, the RAM stores date / time information indicating the current date / time of the sensor device, and the date / time information is sequentially updated by the date / time information from the time information output unit 12.

  The voltage drop detection unit 50 outputs a detection signal to the processing unit 11 when a power supply voltage from a power supply (not shown) (a power supply of the sensor device, for example, a secondary battery) becomes smaller than a predetermined voltage. When receiving the detection signal, the processing unit 11 sets the sensor device to the power saving mode. In the power saving mode, the operation of the components other than the time information output unit 12 and the RAM 40 is stopped to save power consumption. That is, only the date / time information is updated, and the data processing by the processing unit 11, sensing by the sensor unit 20, communication processing by the communication unit 60, and display processing by the display unit 70 are stopped.

  For example, the voltage drop detection unit 50 has a diode and a voltage dividing circuit (not shown), and compares the voltage obtained by dividing the power supply voltage by the voltage dividing circuit with the voltage at both ends of the diode, so that the power supply voltage is more than the predetermined voltage. Detect that it has become smaller.

  The communication unit 60 performs communication processing with the outside of the sensor device (for example, the cradle 110 and the PC 200 shown in FIG. 3). The communication process may be a wireless communication process or a wired communication process. For example, it may be a communication process compliant with various communication standards such as wireless LAN, Bluetooth, USB, etc., or may be a communication process of an original standard.

  The display unit 70 includes, for example, a liquid crystal display device, and includes date and time, exercise history, biological information (for example, blood pressure, pulse), exercise information (for example, exercise duration, calorie consumption, number of steps), user setting information (for example, height, weight, Age).

2. Date / Time Information Setting Processing in Initialization Processing Next, processing for setting date / time using the date / time information remaining in the sensor device in the initialization processing performed by the sensor device described above will be described.

  Here, the initialization process (reset process) is a process of starting the sensor device from a state in which the sensor device has been reset (boot process) and making the sensor device operable by the user. For example, in this embodiment, when the power supply voltage decreases, the sensor device operates in the power saving mode. After that, when the power supply is charged or exchanged and the power supply voltage increases, the sensor device can be activated. When the user performs an activation operation, the microprocessor 10 executes an initialization processing program, and activates each unit and initializes the RAM 40.

FIG. 2 shows a flowchart of date information setting processing (time information setting processing in a broad sense) in the initialization processing. As shown in FIG. 2, when this process is started, the validity of the value of the date / time information (time information in a broad sense) held in the RAM 40 is determined (step S1). This validity is determined by whether or not the value of the date and time information held in the RAM 40 is within a predetermined range. The predetermined range is, for example, the range shown below.
Year: Shipment year (for example, 2011) to 2099
Month: 1-12
Day: 1-31
Hours: 0-23
Minute: 0-59
Seconds: 0-59

  In the determination of validity, it is determined whether or not the data stored in the RAM 40 is destroyed. For example, if the RAM 40 cannot hold the stored data due to a decrease in the power supply voltage and the stored data is destroyed, the date / time information on the RAM 40 is converted to data such as “00” or “FF”. In the present embodiment, such a destroyed data is excluded as inconsistent data by using a range of actual dates and hours / minutes / seconds as a condition.

  If the value on the RAM 40 is valid, the value on the RAM 40 is set as date / time information (step S2), and the process is terminated. If the value on the RAM 40 is not valid, it is checked whether or not the daily history data exists in the flash memory 30 (step S3).

  If the daily history data exists, the date information of the most recently measured date in the daily history data is set as the date / time information (step S4), and the process is terminated. Of the date / time information, the hour / minute / second information may be set to 00:00:00, for example, or if the history data includes the hour / minute / second information, the information may be used. If the daily history data does not exist, a predetermined initial value (for example, January 1, 2011 (Saturday) 00:00:00) is set as the date / time information (step S5), and the process is terminated.

  The above processing is performed before the stored contents of the RAM 40 are initialized in the initialization processing, and the count start time of the time information output unit 12 is set by setting the date and time information of this processing. Then, after the stored contents of the RAM 40 are initialized, the time information output unit 12 updates the date / time information of the RAM 40.

3. Measurement System Now, for products with a clock function, many products set the date and time as the initial time when a reset process occurs due to battery exhaustion. For example, if it was released in 2011, the date and time are set to “January 1, 2011 (Saturday) 00:00:00”.

  Such a product is made on the premise that it does not need to store measurement data and does not have a function of uploading data used for an arbitrary application. For this reason, if measurement data is accumulated and the measurement data is to be used in an application, there is a problem in that data that does not have time consistency with past measurement data is uploaded. This point will be described in detail below.

  In the following, a case where the above-described sensor device 100 is a pulse sensor device that senses a pulse with an infrared sensor will be described as an example. However, the present embodiment is not limited to this, and various sensor devices can be used.

  First, FIG. 3 shows a configuration example of a measurement system using the above-described sensor device. The measurement system includes a sensor device 100, a cradle 110, a PC 200 (personal computer), and a server system 400.

  The sensor device 100 senses a user's pulse, and acquires exercise information such as calorie consumption based on the pulse, the user's weight, height, and age. The sensor device 100 accumulates the exercise information and the acquisition date and time as history information.

  When the user operates the button of the sensor device 100 and executes transmission of history information, the history information is transmitted to the cradle 110 by wireless communication. The cradle 110 is connected to the PC 200 by wired communication (for example, USB), and transmits history information from the sensor device 100 to the PC 200 via the wired communication.

  Software for cooperating with the sensor device 100 is installed in the PC 200 in advance, and history information from the sensor device 100 is transmitted to the server system 400 via the network 300 by the software.

  The network 300 (distribution network, communication line) is a communication path using, for example, the Internet or a wireless LAN. In addition to a LAN using a dedicated line (dedicated cable) or Ethernet (registered trademark) for direct connection, telephone communication A communication network such as a network, a cable network, or a wireless LAN can be included. The communication method may be wired / wireless.

  The server system 400 provides an exercise program service to the user via the network 300. That is, the server system 400 performs data processing on the history information received from the PC 200 via the network 300, generates display data such as time-series information of calories burned, and the display data is transmitted to the PC 200 via the network 300. Send to. For example, the display data is provided in the HTML format, and the PC 200 displays the display data on the display unit using a web browser.

  FIG. 4 shows an example of a display image displayed on the display unit of the PC 200 by the measurement system. A1 in FIG. 4 represents a display area of the web browser. As shown in A2 to A4, the display area of the web browser is provided with a display area for user setting information, a menu display area, and a history information display area.

  In the display area of the user setting information, the user's current weight, target weight, and target achievement rate are displayed. In the menu display area, a menu for the user to operate the exercise program service is displayed. In the history information display area, daily exercise information (exercise results) is displayed in time series based on the history information transmitted from the sensor device 100. In the history information display area, an implementation period in which the exercise program service is provided is displayed, and the user aims to achieve the goal within the implementation period.

  In such a measurement system, it is assumed that the sensor device 100 is subjected to a reset process due to battery exhaustion, and the date is automatically set to the initial time of “Saturday, January 1, 2011, 00:00:00”.

  In this case, if exercise measurement is performed in a state where the user has finished charging and is unaware that the initial time has been set, measurement data of “Saturday, January 1, 2011 00:00:00” is generated. Will be. When this measurement data is uploaded to an exercise program service that is carried out within a period in which a start date and an end date are determined, the following problems occur.

  That is, the exercise data at the initial time greatly deviates from the execution period set in the exercise program service, and thus there is a problem that the exercise data is not suitable as the program target data. For example, when the implementation period is from October 1, 2011 to March 31, 2012, the measurement data of the initial time January 1, 2011 is not data within the implementation period and is not consistent with the implementation period. Judged to be data.

  In this case, the measurement data is not used as the user's exercise performance and is not displayed in the exercise history of the web browser. In addition, when performing an exercise performance ranking service among users participating in the exercise program service, the measurement data of the initial time is not reflected in the ranking.

  In addition, the user may reset the time when the battery of the sensor device 100 runs out, but every time reset is performed, it is set to “January 1, 2011 (Saturday) 00:00:00”. The number of key operations when making corrections to the current time increases, and time corrections that occur each time resetting is a burden on the user.

  In this regard, according to the present embodiment, as described in FIG. 1, the sensor device includes a sensor unit 20 that outputs sensor detection information, a time information output unit 12 that outputs time information (for example, date and time information), and a nonvolatile memory. And a processing unit 11 that stores information associating sensor detection information with time information in the nonvolatile storage unit as history information. As described in S3 and S4 of FIG. 2, in the initialization process of the system (sensor device 100), the processing unit 11 reads the history information from the non-volatile storage unit, and converts the time information included in the history information into the system information. Set as time information.

  For example, in the present embodiment, as illustrated in FIG. 5, in the motion measurement process, the processing unit 11 refers to the RAM 40 and the sensor unit 20 to acquire time information and sensor detection information, and associates the sensor detection information with the time information. It is stored in the flash memory 30 as daily exercise history information. The information that associates the sensor detection information with the time information may be information that associates the sensor detection information (for example, pulse information) with the time information, or information that is obtained by processing the sensor detection information (for example, consumption) (Calorie information) may be information associated with time information.

  In the present embodiment, as shown in FIG. 6, in the initialization process, the processing unit 11 extracts time information from the history information read from the flash memory 30 and sets the time information in the time information output unit 12. . The time information output unit 12 starts counting time from the set time information and outputs system time information.

  In FIGS. 5 and 6 and FIGS. 7 and 8 described later, the voltage drop detection unit 50, the communication unit 60, and the display unit 70 are omitted for the sake of simplicity.

  Here, the nonvolatile storage unit is a storage unit that holds stored data even when power is not supplied. For example, the nonvolatile storage unit can be realized by an EEPROM (for example, flash memory), a hard disk drive, or the like.

  In this way, the sensor device 100 can provide a function for guaranteeing the consistency of history information. That is, even if the user forgets to set the initial time and exercises, the created history information becomes exercise data within the exercise program service implementation period, so that consistent data can be created. . In addition, since it is possible to automatically correct the date and time based on the history information by referring to the history information, it is easier than manually correcting from the initial value “Saturday, January 1, 2011 00:00:00”. The date and time can be corrected. For example, since the correction time of the date and time can be shortened, the user's trouble is reduced.

  Further, in the present embodiment, the processing unit 11 uses the latest time information in the time information included in the history information, or time information obtained by elapse of a predetermined time (for example, one day) from the latest time information, as the system time. Set as information.

  Here, the latest time information is the latest (latest) time information among the time information recorded in the history information. For example, when there is history information from October 1, 2011 to October 15, 2011, October 15, 2011 is the latest time information. The latest time information is not limited to the latest time information, and may be time information within a predetermined time (for example, three days) from the latest time information.

  In this way, when history information already exists, data that is consistent with the history information can be measured. That is, the data measured after the initialization process can be recorded as date and time data later than the already measured history information, and can be recorded as measurement data of a time as close as possible to the actual measurement time.

  In the present embodiment, as described in S3 and S5 in FIG. 2, the processing unit 11 has a predetermined initial value (for example, “January 1, 2011” when there is no history information in the nonvolatile storage unit. Date (Saturday) 00:00:00 ") is set as the system time information.

  In this way, when there is no history information, that is, when the sensor device 100 is in a factory-shipped state or never used, the initial value is set as the time after the initialization process. it can.

  In the present embodiment, as described with reference to FIG. 1, the sensor device 100 includes the RAM 40 that stores time information from the time information output unit 12 as system time information. As shown in S1 and S2 of FIG. 2, the processing unit 11 sets the time information held in the RAM 40 as the system time information in the system initialization process.

  Specifically, the processing unit 11 determines whether or not the time information held in the RAM 40 is valid as the system time information. If it is determined that the time information is valid, the processing unit 11 holds the time information in the RAM 40. Set time information as system time information.

  For example, in the present embodiment, the time information in the RAM 40 is updated until the power supply voltage becomes lower than the operable voltage of the time information output unit 12 after the power supply voltage decreases and the processing unit 11 stops operating. Even after the time information output unit 12 stops due to the power supply voltage drop, the time information last output by the time information output unit 12 can be held in the RAM 40 until the power supply voltage becomes lower than the voltage that can be stored in the RAM 40. There is sex.

  As shown in FIG. 7, in the initialization process, the processing unit 11 refers to the time information storage area of the RAM 40 and acquires the time information held in the RAM 40. When the acquired time information is valid, the processing unit 11 sets the time information in the time information output unit 12. For example, when the power supply voltage before charging is lower than the voltage that can be stored in the RAM 40, the time information is destroyed and becomes abnormal numerical data. In such a case, it is determined that the data is invalid. The time information output unit 12 starts counting from the set time information.

  In this way, when time information is held in the RAM 40 before the start of the initialization process (for example, before the start of charging), the time is automatically set in the initialization process using the held time information. it can. Since the time information from the time information output unit 12 is stored in the RAM 40, a time closer to the actual measurement time can be set than when the history information is used.

  In the present embodiment, as shown in S1, S3, S4 of FIG. 2 and FIG. 6, the processing unit 11 determines that the time information held in the RAM 40 is not valid as the system time information. Reads the history information from the non-volatile storage, and sets the time information included in the history information as the system time information.

  In this way, even when the time information of the RAM 40 is destroyed due to a drop in the power supply voltage, the time information is corrected using the time information of the history information that is considered as close to the actual date and time as possible. Can do.

  In the present embodiment, as described in S1 of FIG. 2, the processing unit 11 determines that the time information held in the RAM 40 is valid as the system time information when the time information is within a predetermined time range. judge.

  In this way, when the time information remaining in the RAM 40 is in a time range that cannot actually exist, it can be determined that the time information is not valid. Thereby, it is possible to avoid setting a random time based on time information destroyed due to a decrease in power supply voltage or the like.

  In the present embodiment, as described with reference to FIG. 1, the processing unit 11 sets the system to the power saving mode when the power supply voltage of the system is lower than a predetermined voltage. As shown in FIG. 8, in the power saving mode, the processing unit 11 stops acquiring history information, and the time information output unit 12 continues outputting time information to the RAM 40.

  In this way, even after the power supply voltage drops and the sensor device appears to stop functioning for the user, the system time information is kept for as long as possible while minimizing power consumption. Can continue to update. Thereby, in the initialization process after charging, time information as close as possible to the actual date and time can be set.

  In the present embodiment, as described with reference to FIG. 3, the measurement system includes the sensor device 100 and a display data generation unit. The display data generation unit acquires history information stored in the non-volatile storage unit, and generates display data of measurement results based on the acquired history information.

  Specifically, the display data generation unit uses the history information in which the time information associated with the sensor detection information is within the measurement period (implementation period) of the acquired history information, and displays the display data of the measurement result. Generate.

  For example, in the measurement system of FIG. 3, the server system 400 corresponds to the display data generation unit, the display data generation unit acquires history information via the network 300, and the generated display data is transmitted via the network 300. It is displayed on the display unit of the PC 200. Note that the present embodiment is not limited to this, and the PC 200 may acquire history information as a stand-alone and generate display data without using the network 300 or the server system 400.

  In this way, a motion measuring system using the sensor device can be configured. When the service implementation period is fixed as in the exercise program service described above, the time information is automatically set in the initialization process as in this embodiment, so that measurement can be performed immediately without bothering the time setting. It can be started and used as data within the service implementation period.

4). Pulse Sensor Device FIGS. 9 and 10 show a configuration example of the pulse sensor device. As shown in FIG. 9, the pulse sensor device includes a belt 130 for fixing the pulse sensor device to the user's wrist, a housing 120, a display unit 140 for displaying time and measurement information, and a power on / off state. And LED 150 for displaying the state of charge, and a plurality of buttons 161 to 164 for the user to operate the pulse sensor device.

  After the display unit 140 is in a state where the battery is out of full screen, when the pulse sensor device is set in the cradle 110 of FIG. . At this time, the display unit 140 displays the time at the end of measurement of the latest history before charging or the time remaining in the RAM 40.

  As shown in FIG. 10, the pulse sensor device includes a charging terminal 170 connected to the charging terminal of the cradle 110 or the terminal of the charging adapter, and a pulse sensor unit 180. The pulse sensor unit 180 is brought into contact with the user's wrist by the belt 130 and senses the pulsation of the blood vessel of the wrist. Specifically, the pulse sensor unit 180 includes a light source unit 181 that emits infrared rays toward the wrist, and a photosensor 182 that detects infrared reflected light from the wrist. The amount of reflected infrared light changes due to the pulsation of the blood vessel, and the pulse is detected by detecting the change by the photo sensor 182.

  Although the present embodiment has been described in detail as described above, it will be easily understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. Accordingly, all such modifications are intended to be included in the scope of the present invention. For example, a term described with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings. Further, the configuration and operation of the sensor device, the measurement system, and the like are not limited to those described in the present embodiment, and various modifications can be made.

10 microprocessor, 11 processing unit, 12 hour information output unit,
20 sensor unit, 30 flash memory, 50 voltage drop detection unit,
60 communication unit, 70 display unit, 100 sensor device, 110 cradle,
120 housing, 130 belt, 140 display unit, 161-164 buttons,
170 charging terminal, 180 pulse sensor unit, 181 light source unit,
182 Photosensor, 300 network, 400 server system

Claims (7)

A sensor unit that outputs sensor detection information;
A time information output unit for outputting time information;
A non-volatile storage unit;
A processing unit that stores information associating the sensor detection information with the time information in the nonvolatile storage unit as history information;
RAM for storing the time information from the time information output unit as system time information of a system;
Including
The processor is
In the initialization process of the system, it is determined whether or not the time information stored in the RAM is valid as the system time information. If it is determined that the time information is valid, the time information is stored in the RAM. the time information is set as the system time information, when it is determined not valid, reading the history information from said nonvolatile storage unit, the said time information included in the history information system A sensor device that is set as time information. A sensor unit that outputs sensor detection information;
A time information output unit for outputting time information;
A non-volatile storage unit;
A processing unit that stores information associating the sensor detection information with the time information in the nonvolatile storage unit as history information;
RAM for storing the time information from the time information output unit as system time information of a system;
Including
The processor is
In the initialization process of the system, reading the history information from said nonvolatile storage unit, and sets the time information included in the history information as the system time information,
In the initialization process, when the time information stored in the RAM is within a predetermined time range, it is determined that the system time information is valid, and the time stored in the RAM is determined. A sensor device characterized in that information is set as the system time information . A sensor unit that outputs sensor detection information;
A time information output unit for outputting time information;
A non-volatile storage unit;
A processing unit that stores information associating the sensor detection information with the time information in the nonvolatile storage unit as history information;
RAM for storing the time information from the time information output unit as system time information of a system;
Including
The processor is
In the initialization process of the system, the history information is read from the nonvolatile storage unit, the time information included in the history information is set as the system time information of the system ,
When the power supply voltage of the system drops below a predetermined voltage, the processing unit sets the system to a power saving mode, and in the power saving mode, the processing unit stops acquiring the history information and the time The information output unit continues to output the time information to the RAM. In the initialization process after the power saving mode is set, the processing unit stores the time information stored in the RAM. The sensor device is set as the system time information . In any one of Claims 1 thru | or 3 ,
The processor is
A sensor device characterized in that the latest time information in the time information included in the history information or time information after a predetermined time has elapsed from the latest time information is set as the system time information. In claim 4 ,
The processor is
When the history information is not stored in the nonvolatile storage unit, a predetermined initial value is set as the system time information. A sensor device according to any of claims 1 to 5,
A display data generation unit that acquires the history information stored in the nonvolatile storage unit, and generates display data of measurement results based on the acquired history information;
Including
The processor is
In a system initialization process, the history information is read from the nonvolatile storage unit, and the time information included in the history information is set as system time information of the system. In claim 6 ,
The display data generation unit
A measurement system for generating display data of the measurement result by using the history information in which the time information associated with the sensor detection information is within a measurement period among the acquired history information.

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