JP6329825B2 - Biological information measuring device - Google Patents

Description

  The present invention relates to a biological information measuring device that measures biological information such as body weight and body composition, and more particularly to a technique for identifying a measurer.

Conventionally, body weight is measured for the purpose of self-health and physical condition management. In recent years, there is a biological information measuring device that measures bioelectrical impedance in addition to body weight and calculates various body compositions such as body fat percentage and basal metabolism from the measured values. In such a biological information measuring device, since basic information such as the height and gender of the measurer is required to calculate various body compositions, for example, assuming a case where multiple people in the home measure, Basic information can be registered in advance for each user.
In the case of a biometric information measuring apparatus capable of user registration, it is necessary to recognize a measurer from among users registered in advance.
Patent Document 1 describes a technique for identifying a measurer while allowing a certain degree of variation in biological information measurement values by setting an allowable range.

In the biological information measuring device, by comparing the measurement history of the registered user with the current measurement value, it is identified whether the current measurer is a registered user or an unregistered guest.
In the technique described in Patent Document 1, the tolerance value for variation for identifying the measurer is defined as a constant value.
However, there is a situation in which only one person is registered in the body composition meter for living alone, and there is not much measurement by anyone other than the registrant.
Registered users in such cases are considered to have a large change in body weight due to, for example, before and after meals, before and after exercise in a gym, disorder of eating habits, etc. , The measurer could not be accurately identified and could be misidentified as a guest.

Japanese Patent Laid-Open No. 11-076177

  An object of the present invention is to further reduce misrecognition of being a guest other than a registered user.

(1) In the invention described in claim 1, a body weight measuring means for measuring the weight of the measurer, a bioimpedance measuring means for measuring the bioimpedance of the measurer, a user registration means for performing user registration of the measurer, According to the measurement history storage means for storing the measured weight and bioelectrical impedance as the measurement history for each user, the user number confirmation means for confirming the number of users registered by the user registration means, and the confirmed number of users An allowable range acquisition means for acquiring a weight allowable range and a bioelectrical impedance allowable range, a value of the measured weight and bioelectrical impedance, and a value of a measurement history for each user stored in the measurement history storage means. , A recognition candidate specifying unit that recognizes a user whose difference is within the acquired allowable range, and one user from the specified recognition candidate User recognition means for recognizing as a measurer, wherein the allowable range acquisition means has a wider range than the allowable range when the number of confirmed users is 1, and the allowable range when the number of users is plural. A biological information measuring device is provided which is characterized in that it is obtained.
(2) In the invention described in claim 2, when the number of confirmed users is plural, the allowable range acquisition unit acquires a wider allowable range as the number of users decreases. A biological information measuring device according to 1 is provided.
(3) In the invention according to claim 3, when there are a plurality of the identified recognition candidates, the user recognition means uses a recognition candidate whose biometric impedance is closest to the current measurement value as a measurer. The biological information measuring device according to claim 1, wherein the biological information measuring device is recognized.
(4) In the invention according to claim 4, when there are a plurality of recognition candidates whose measurement history is closest to the current measurement value, the user recognition means has the measurement history closest to the current measurement value for weight. The biological information measuring device according to claim 1, wherein the recognition candidate is recognized as a measurer.

  According to the invention, since the permissible range when the number of registered users is 1 is acquired by acquiring a range wider than the permissible range when the number of users is plural, guest other than registered users It is possible to further reduce misrecognition of being.

It is an external appearance block diagram of a biological information measuring device. It is a functional block diagram of a biological information measuring device. It is explanatory drawing which represented notionally the content of the storage data of a user information storage part and measurement result historical data. It is explanatory drawing showing the detail of the display screen of a display part. It is a flowchart showing the whole measurement processing operation. It is a flowchart showing the detail of the measurer identification process. It is explanatory drawing showing the preservation | save content of the tolerance | permissible_range table in a modification.

Hereinafter, a preferred embodiment of the biological information measuring device of the present invention will be described in detail with reference to FIGS.
(1) Outline of the embodiment

In the biological information measuring apparatus of the present embodiment, body weight and bioelectrical impedance are measured and stored as history data of measurement results for each registered user.
Then, the measured result is compared with the past measurement history, the history in which the difference in the bioelectrical impedance and the difference in the body weight are within the predetermined allowable ranges, respectively, is registered, and the registered user having the largest number of history in both the allowable ranges Is recognized as the current measurer.
If there is no history that is in both allowable ranges, it is recognized as an unregistered measurer, that is, a guest.

In the present embodiment, the allowable range for the difference between the current measured value and the history (bioimpedance and body weight) is changed according to the number of registered users.
That is, when the number of registered users is 1, the allowable range in the measurer identification process is made wider than in the case of a plurality of users.
Moreover, when there are a plurality of registered users, the allowable range may be narrowed according to the number of registered users as the number of registered users increases.

When the biometric information measuring device recognizes the measurer, the biometric information measuring device checks the number of registered users and determines whether or not the difference from each history is within an allowable range defined according to the number of people.
As a result, when the number of user registrations is small, such as living alone, even if there is a significant change in weight, the allowable range is set wide, so that it is difficult to make a guest determination.
In addition, in the case where the whole family is registered as a user, the allowable range is not widened, so that a guest can be accurately determined when measurement is performed by a person other than the user registrant.

(2) Details of Embodiment FIG. 1 shows an external configuration of a biological information measuring apparatus to which the present embodiment is applied. (A) is a plan view, (b) is a front view, and (c) is a rear view. It is.
As shown in FIG. 1 (a), the biological information measuring apparatus 1 of the present embodiment includes an apparatus main body 10. On the upper surface of the apparatus main body 10, there are a display unit 11 and left and right and up and down according to the arrangement of legs. Measurement electrodes 12 and an operation unit 13 are arranged at four positions.
On the back side of the apparatus main body 10, weight sensors 15Lf, 15Lb, 15Rf, and 15Rb are arranged at four corners as shown by dotted lines in FIG. 1 (a) and as shown in FIGS. 1 (b) and 1 (c). Further, push switches 16L and 16R are arranged at both front corners of the apparatus main body 10.
As shown in FIG. 1B, a power switch 14 is disposed on the rear side surface of the apparatus main body 10.

The apparatus main body 10 is a casing with a flat surface on which a measurement subject rides.
An electronic circuit, a power supply, a power supply holding unit, and the like (not shown) are provided inside the apparatus main body 10.

The display unit 11 is composed of a liquid crystal display.
The display unit 11 of the present embodiment employs a segment system, but a dot matrix liquid crystal display can also be employed.
The display unit 11 displays input information input at the time of user registration, measurement results such as weight and body fat percentage, and the like.
Each display item and display area of the display unit 11 will be described later.

The measurement electrodes 12Lf, 12Lb, 12Rf, and 12Rb are for measuring the bioimpedance of the measurement subject on the apparatus body 10, and a total of four electrodes are arranged on the front, rear, left, and right.
The measurement electrode 12Lf, 12Lb, 12Rf, 12Rb measures the resistance value between the electrodes, thereby calculating the bioimpedance of the measurer.
Actually, a weak constant current of high frequency is applied from one electrode, a voltage drop is measured at the other one electrode, and a resistance value between both electrodes is measured from this voltage drop.

The measurement electrodes 12Lf, 12Lb, 12Rf, and 12Rb are distinguished and displayed by L and R with respect to the left and right, and subscripts f and b with respect to the front and rear depending on the arrangement location.
In measurement, the measurer places the toe side and the heel side of the left and right feet on the measurement electrodes 12Lf, 12Lb, 12Rf, and 12Rb with the arch interposed therebetween.
In the following description, as a symbol for designating the measurement electrode, 12L or 12R is designated when specifying either left or right regardless of front and rear, and either front or rear is specified regardless of left or right. In this case, they are expressed as 12f and 12b, and when any one or all of the measurement electrodes are specified regardless of whether they are front, rear, left or right, they are expressed as 12.
The notation of this subscript is the same for the weight sensors 15Lf, 15Lb, 15Rf, 15Rb, and the push switches 16L, R.

The operation unit 13 includes an upper key 13a, a lower key 13b, a clear key 13c, and a setting key 13d.
The up and down keys 13a and 13b are keys for making a transition to another screen on a display screen having no setting items and changing the contents (numerical values and items) of the setting items on the display screen having the setting items.
The clear key 13c is a key for clearing each item and value being displayed and returning to the previous screen.
The setting key 13d is a key for confirming an item set on a display screen with a setting item and shifting to the next setting item and the next display screen.
Various selections such as input of basic information (height, sex, date of birth) for each user (measurement person), selection of a user, and selection of various modes are performed by operating each key of the operation unit 13.

  The biological information measuring apparatus 1 is configured such that, after the measurement is completed, when a non-operation state of the operation unit 13 has elapsed for a predetermined time (for example, 1 minute), the biological information measurement device 1 shifts to a power saving state and the liquid crystal display of the display unit 11 is turned off. ing. In this power saving state, when any key of the operation unit 13 is pressed, the power saving state is canceled and calibration is started.

  The power switch 14 is a switch that cuts off all power supply from the power source to each unit such as the display device 11 and a control unit described later.

The weight sensors 15Lf, 15Lb, 15Rf, and 15Rb are sensors for measuring the weight of the measurer on the biological information measuring device 1, and are configured by four load cells in the present embodiment.
Each weight sensor 15 outputs a physical quantity corresponding to the weight value of the measurer, and the weight of the measurer is calculated based on each output value.
The body weight of the measurer calculated from each detection value of the weight sensor 15 is used to calculate the body composition BMI (Body Mass Index) and basal metabolism together with the basic information registered for the measurer. The body weight of the measurer includes the body impedance calculated from the detection value of the measurement electrode 12 and basic information, and the body fat percentage, the built-in fat level (rate), the body age, the bone level, and the skeletal muscle. Level and moisture content are calculated.

Each weight sensor 15 measures a load applied during measurement in units of 10 g.
In the present embodiment, the weight calculated in units of 10 g is used for storage in a measurement result history, which will be described later, and calculation of biological information such as body fat percentage, and the display device 11 is rounded to the nearest 100 g. Are all displayed in units of 10 g, or all units of 100 g can be used.
However, for simplification in the following description, a case where the unit is 100 g in storage, calculation, and display will be described.

The push switches 16L and 16R are arranged at two positions on the back side of the apparatus main body 10 and the front left and right, and are switches that detect that the measurer gets on the biological information measuring apparatus 1 (step-on).
When the biological information measuring device 1 is in a power saving state, when step-on is detected by the push switch 16, the measurement is started after returning from the power saving state.
In the biological information measuring apparatus 1 according to the present embodiment, the case where the two push switches 16L and 16R are arranged on the front left and right will be described. However, the push switches 16L and 16R may be arranged on the rear left and right. You may make it arrange | position to.

The weight sensor 15, the measurement electrode 12, and the push switch 16 can all function as part of a measurement time detection unit that detects the measurement time. In the present embodiment, all functions as part of the measurement time detection means.
That is, in the present embodiment, the weight sensor 15, the measurement electrode 12, and the push switch 16 detect that a foot is placed on the biological information measuring device 1 (measurement start), and the time at the time of detection is detected as the measurement time. .
Note that the measurement time may be the same standard, and in addition to the measurement start time, the time when the measurement of the body weight and the bioelectrical impedance is completed, the time when the measurement is taken off from the biometric information measurement device 1, and the like can be adopted.
The measurement time depends on the time output from the date / time information measurement unit 33 described later.

FIG. 2 shows functional blocks of the biological information measuring apparatus 1.
The biological information measuring apparatus 1 includes a control unit 20 that performs various controls on the entire apparatus such as calculation of biological information based on measurement results, display control thereof, storage in a measurement result history, and control corresponding to an input operation.
The control unit 20 includes a display unit 11, an operation unit 13, a push switch 16, A / D conversion units 31 and 32, a date and time information measurement unit 33, a communication unit 34, an audio output unit 35, and a nonvolatile memory that functions as a storage device 40 is connected.

The A / D conversion unit 31 converts the analog detection value input from each weight sensor 15 into a digital value and supplies the digital value to the control unit 20.
The A / D conversion unit 32 converts the analog detection value input from each measurement electrode 12 into a digital value and supplies the digital value to the control unit 20.

  The date / time information measuring unit 33 functions as part of a measurement time detection unit that measures the current date / time as the date / time information in units of year / month / day / hour / minute / second, and supplies the measured date / time information to the control unit 20. The date information may be supplied at every predetermined timing, or may be supplied in response to a request from the control unit 20.

The communication unit 34 functions as an output unit for outputting various measurement results obtained by the biological information measuring apparatus 1 to the outside.
The measurement result by the communication unit 34 is output wirelessly in this embodiment, but may be output by wire.
As an example in the case of wired, for example, output to various storage media such as a USB memory, and output to an external device such as a personal computer or a portable terminal via various cables are possible.
As a method for outputting the measurement result by wireless communication by the communication unit 34, Bluetooth (Bluetooth (registered trademark), infrared communication, NFC (registered trademark), ZigBee (registered trademark), WiMAX (Worldwide Interoperability Access (registered trademark)), Various types of wireless communication such as short-range wireless communication such as Wi-Fi (Wireless Fidelity (registered trademark)), 3G system, and 4G system can be used.
The communication unit 34 according to the present embodiment is configured to be able to input and output data using one or a plurality of methods among these various wired and wireless communications.

The voice output unit 35 is an output device that outputs a guidance voice for operation guidance corresponding to each input operation screen during an input operation, and outputs a beep sound after the measurement is completed.
About the sound and sound by the audio | voice output part 35, although it is set to ON which outputs as a default setting, it can be changed to OFF setting by user operation. Note that the default setting may be reversed.

The nonvolatile memory 40 includes a storage medium that stores various data, and stores a user information storage unit 41, measurement result history data 42, an allowable range table 43, and other data.
FIG. 3 conceptually shows the contents of the stored data of the user information storage unit 41 and the measurement result history data 42.
As shown in FIG. 3A, the user information storage unit 41 stores user number, gender, height, and age specifying information as basic information for each user (measurer). The age specifying information may be information that can calculate the age of the user at the time of measurement, and corresponds to the age of the user at the time of registration, the registration date, the date of birth, and the like.

The measurement result history data 42 stores a user 1 history 421, a user 2 history 422,... For each registered user number.
As shown in FIG. 3B, each user history of the measurement result history data 42 stores weight (kg), bioelectrical impedance (Ω), and measurement date / time (year / month / day / minute).
In FIG. 3, bioelectrical impedance is represented by BI. The same applies to other drawings.

In the present embodiment, the case where the number of user registrations is four is described. However, any number of users can be registered as long as a plurality of measurers need to be recognized, such as five assuming a family of five. Yes, it can be unlimited.
In addition, the number of measurement histories stored in the measurement result history data 42 is sufficient if at least one latest data is stored for each registered user. However, the number is arbitrary, and in this embodiment, statistics, etc. Up to five measurement histories are stored for use in In the present embodiment, the latest measurement history (for one case) is used in the measurement process of the measurer, but the latest predetermined number (plurality) may be used, and the entire measurement history is used. Then, it may be configured to recognize the measurer.
In addition, when the measurement date and time is used as data for health management of each registered user based on the biometric information obtained from each measurement value, for example, the change over time such as the body weight and the body fat percentage is displayed as a graph. The information is stored as necessary information, but may not be detected and stored. In particular, when only the latest one is stored as the measurement history, the measurement date and time may not be stored.

Further, as shown in FIG. 3C, the allowable range table 43 defines a weight allowable value (weight difference allowable value) and a BI allowable value (BI difference allowable value) according to the number of registered users. Has been.
In this embodiment, when there are a plurality of registered users (2 to 4 people), the weight allowable value is defined as ± 2.0 kg and the BI allowable value is defined as ± 100Ω.
On the other hand, when the number of registered users is one, the allowable range is defined to be larger than a plurality of cases, with a weight allowable value of ± 5.0 kg and a BI allowable value of ± 160Ω.
As described above, in this embodiment, even a single person who may increase the fluctuation range of the body weight or the like because the state and environment of meals and exercise are likely to change frequently, is not easily misidentified as a guest. It becomes possible to do.

FIG. 4 shows details of the display screen of the display unit 11.
FIG. 4 is a display screen showing the weight and body fat percentage after the measurement.
The display unit 11 functions as an output unit that displays the measurement result.
As shown in FIG. 4, the display unit 11 includes six display areas from the first display unit 111 to the sixth display unit 116.
The first display unit 111 and the second display unit 112 are regions in which measurement results and input values in input operations are displayed.
When the measurement result is displayed, the weight is displayed on the first display unit 111, and the calculated body composition value is sequentially switched every predetermined time (for example, 2 seconds) on the second display unit 112. Is displayed. The second display unit 112 sequentially displays body fat percentage, BMI, basal metabolism, skeletal muscle level, bone level, visceral fat level, water content, body age, and body fat percentage. While these body compositions are sequentially switched and displayed on the second display unit 112, the weight is continuously displayed on the first display unit 111.

  On the other hand, when the input value is displayed in the input operation, the year is displayed on the first display unit 111 and the date is displayed on the second display unit 112 in the input operation for setting the date and time or the user's birth date. In the date and time setting, the input time (hours and minutes) is displayed on the first display unit 111 after inputting the date.

The first display unit 111 and the second display unit 112 display measured values and input values, and display units (kg, cm,%, Kcal) of displayed items and display items corresponding to each display content. The supplementary characters (year, month, day, hour, minute, age) for are displayed.
In FIG. 4, the body weight (61.3 kg) and the body fat percentage (15.5%) are displayed as the measurement results after the measurement.

  The third display unit 113 is a graph that displays how far each body composition displayed on the second display unit 112 is from the standard value. A total of nine levels are displayed, including the standard three levels, the lower three levels, and the higher three levels.

The fourth display unit 114 displays item names of items being displayed on the first display unit 111 and the second display unit 112. In FIG. 4, the item name “weight” for the display of the first display unit 111 is displayed, and the item name “body fat percentage” for the display of the second display unit 112 is displayed.
Although not displayed in FIG. 4, “during measurement” is displayed on the fourth display unit 114 during measurement.

The fifth display unit 115 displays the user number and gender.
As for the user number displayed on the fifth display unit 115, the specified user number is displayed when the user is specified before the start of measurement, and the user automatically recognized from the measurement result in the automatic recognition mode. The number is displayed.
The gender displayed in the fifth display unit 115 is the gender stored in the user information storage unit 41 corresponding to the designated or automatically recognized user number, as shown in FIG. , “Female”.

  The sixth display unit 116 is a display area in which various states of the biological information measuring device 1 are displayed, and displays a remaining battery level display, a radio wave reception state, and the like.

Returning to FIG. 2, the control unit 20 includes a CPU that performs various arithmetic processes according to a program, a ROM that stores the program, a RAM as a work area, and the like.
The control unit 20 performs various processes such as calculation, display, and storage of biological information according to a measurement processing program stored in various storage media, and performs a measurer identification process in the present embodiment. As a functional block for performing each of these processes according to a program, the control unit 20 includes a weight calculation unit 21, a bioelectrical impedance calculation unit 22, a boarding / alighting determination unit 23, a body composition calculation unit 24, a measurer identification unit 25, and a measurement result storage control unit. 26.

The weight calculation unit 21 calculates the weight of the measurer from each weight value detected by each weight sensor 15 and converted into a digital signal by the A / D conversion unit 31. Specifically, the weight of the measurer is calculated by summing up the respective weight values.
The weight calculation unit 21 supplies the calculated weight of the measurer to the body composition calculation unit 24.

The bioelectrical impedance calculation unit 22 detects the resistance value between the measurement electrode 12L and the measurement electrode 12R detected by each measurement electrode 12 and converted into a digital signal by the A / D conversion unit 32 (between the left foot-body-right foot). The bioelectrical impedance of the measurer is calculated from the resistance value. For the calculation of the bioelectrical impedance, a known calculation method is adopted, and other body compositions are also calculated based on known calculation formulas and statistical data.
The bioelectrical impedance calculating unit 22 supplies the calculated biometric impedance of the measurer to the body composition calculating unit 24.

  The boarding / alighting determination unit 23 determines the step-on of the measurer based on a signal (switch ON signal) supplied from the push switch 16. As described above, when step-on is detected in the power saving state, the power saving state is canceled and measurement is started.

The body composition calculation unit 24 corresponds to the weight supplied from the weight calculation unit 21, the bioimpedance supplied from the bioimpedance calculation unit 22, and the user number identified by the designated user number or the measurer identification unit 25. Then, each body composition of the measurer is calculated using the user information (gender, height, age calculated from the date of birth) recorded in the user information storage unit 41.
The measured body weight and each calculated body composition are displayed on the display unit 11.

The measurer identifying unit 25 identifies the measurer by comparing the weight, bioelectrical impedance, and measurement time obtained by the current measurement with the measurement history for each user stored in the measurement result history data 42. That is, the user number of the measurer is specified.
Specifically, the time difference between the current measurement time and the history measurement time is t1, t2, t3 (t1 <t2), provided that the difference between both the weight and bioimpedance measurement values and the history value are within a predetermined range. Points s1, s2, and s3 (s1>s2> s3) are added to each of the cases where <t3).
And the registration number with the largest average score (or total value in the case of the same history number) for each user history is recognized as a measurer.

  The measurement result storage control unit 26 is the user number of the measurer identified by the measurer identifying unit 25, or the user of the measurer specified before the measurement, with the current measurement result (weight, bioelectrical impedance) and measurement time. The user history 421 to 424 corresponding to the number is saved.

Next, the operation of the measurement process performed by the biological information measuring apparatus 1 configured as described above will be described.
FIG. 5 is a flowchart showing the entire measurement processing operation.
In response to the measurement person's operation, the control unit 20 switches the measurement mode (step 10). Measurement modes include an automatic recognition mode that automatically recognizes a measurer, a user-designated mode that performs measurement by designating a user, a guest mode that is measured by a measurer other than a registered user, a weight-only measurement mode that only measures body weight, etc. There are various measurement modes.
The measurement mode is selected by the measurer operating the operation unit 13, and the control unit 20 switches to the selected measurement mode.
Note that, when the measurement information is not selected by the measurer and gets on the biological information measuring apparatus 1, the control unit 20 selects the automatic recognition mode as the default mode.

The control unit 20 determines whether or not the switched measurement mode is the guest mode (step 11).
If it is the guest mode (step 11; Y), the control unit 20 acquires guest information (age, height, sex) input from the operation unit 13 by the measurer and stores it in the RAM (step 12).
In the guest information input operation by the measurer, the control unit 20 displays guidance of necessary input items on the display unit 11 and displays the input guest information.

  After the guest information is input or when the guest mode is not set (step 11; N), the control unit 20 performs weight measurement (step 13). That is, the control unit 20 calculates the weight of the measurer by summing the weight values supplied from the four weight sensors 15 via the A / D conversion unit 31.

And the control part 20 judges whether the weight measurement was completed (step 14).
When the measurement is not completed (step 14; N), the control unit 20 determines whether or not there is a measurement error (step 15). When it is a measurement error (step 15; Y), the control unit 20 displays an error in a predetermined area of the display unit 11 (step 16), and ends the process.
Here, as a case where the measurement error is determined, for example, there is a case where the measurer gets off after putting only one foot, and in this case, the control unit 20 is supplied with weight values from the four weight sensors 15. It is judged as a measurement error because the weight value has become zero before starting measurement.
On the other hand, if it is not a measurement error (step 15; N), the control unit 20 returns to step 13 and continues the measurement.

  Next, the control unit 20 determines whether or not the mode switched in step 10 is the weight only measurement mode (step 17). If the mode is the weight only measurement mode (step 17; Y), the control unit 20 performs the measurement. The weight is displayed on the display unit 11 (step 18), and the process is terminated.

In the case of only the body weight measurement mode (step; Y), the measured weight is stored as the measurement history for the designated or automatically recognized measurer (user) by displaying the measurement result and then moving to step 22. You may make it do.
When the measurement person is automatically recognized in the weight only measurement mode, the biometric impedance is removed from the determination target. For this reason, there is a possibility that the accuracy of automatic recognition is lowered. Therefore, whether or not the automatically recognized user is correct is always determined based on the confirmation display on the display unit 11 and the confirmation operation of the measurer. You may make it preserve | save as.

On the other hand, if the measurement mode is not the body weight only mode (Step 17; N), the control unit 20 measures the bioelectrical impedance (BI) (Step 19).
That is, the control unit 20 calculates the biometric impedance of the measurer from each resistance value supplied from the measurement electrode 12 via the A / D conversion unit 32.

And the control part 20 judges whether the measurement of bioelectrical impedance was completed (step 20).
When the measurement is not completed (step 20; N), the control unit 20 determines whether or not there is a measurement error (step 21). When it is a measurement error (step 21; Y), the control unit 20 proceeds to step 16 to display an error in a predetermined area of the display unit 11 and ends the process. The case where a measurement error is determined is the same as in the case of weight measurement.
On the other hand, if it is not a measurement error (step 21; N), the control unit 20 returns to step 19 and continues the measurement.

Next, the control unit 20 determines whether or not the mode switched in step 10 is the automatic recognition mode (step 22).
If it is not the automatic recognition mode (step 22; N), that is, if it is the user designation mode and the guest mode, the control unit 20 proceeds to step 26 because there is no need for automatic recognition.
On the other hand, when the automatic recognition mode is set (step 22; Y), the control unit 20 performs a measurer identification process for automatically identifying the measurer using the measured weight, bioelectrical impedance, and allowable range (step 23). ). Details of the measurer identification process will be described later.

After the identification of the measurer is completed, the control unit 20 performs a measurer confirmation process (step 24).
That is, the control unit 20 displays the user number corresponding to the automatically recognized measurer on the fifth display unit 115 (see FIG. 4) of the display unit 11. For the measurer confirmation, the displayed user number is confirmed, and if it is correct, the setting key 13d is pressed, and if it is wrong, the user number displayed by the upper key 13a or the lower key 13b is changed. The measurer is confirmed by pressing the setting key 13d later.
The control unit 20 determines the measurer from the user number displayed on the fifth display unit 115 when the measurer presses the setting key 13d.
Note that the control unit 20 displays the automatically identified measurer (user number) on the fifth display unit 115, and when the operation unit 13 is not operated within a predetermined time, and when the measurer performs the biological information measurement apparatus 1. When getting off, it is confirmed to the measurer of the displayed user number.

The control unit 20 determines whether the measurer is confirmed (step 25).
When the measurer is not fixed (step 25; N), that is, when the clear key 13c is pressed, the control unit 20 ends the process.
On the other hand, when the measurer is determined (step 25; Y) and in the user designation mode (step 22; N), the control unit 20 stores the current measurement result (step 26). That is, the control unit 20 stores the weight, bioelectrical impedance, and measurement date / time in the measurement result history data 42 corresponding to the determined user number of the measurer.

Further, in parallel with the storage of the measurement result, the control unit 20 displays the measurement result on the display unit 11 (step 27) and ends the process.
In the display of the measurement result, as illustrated in FIG. 4, the control unit 20 displays the measured body weight value on the first display unit 111, and the body fat percentage value calculated from the body weight, the bioimpedance, and the user information. The display unit 112 displays a level display of the body fat percentage on the third display unit 113.
The fourth display unit 114 displays the item names of items being displayed on the first display unit 111 and the second display unit 112, and the fifth display unit 115 displays the user number and gender of the confirmed measurer. Is displayed.
The second display unit 112 first displays the value of the body fat percentage, and thereafter, every predetermined time (2 seconds in the present embodiment), the body fat percentage, BMI, basal metabolism, skeletal muscle level, bone level, Visceral fat level, water content, body age, body fat percentage are displayed in order. As the second display unit 112 is switched, the level display of the third display unit 113 and the item name of the fourth display unit 114 are also switched and displayed.
The body composition such as the body fat percentage displayed on the second display unit 112 is calculated from the body weight, bioelectrical impedance, and basic information, and the level display of the third display unit 113 is obtained from the statistics of the display item. Calculated based on standard values.

Next, details of the measurer identification process (step 23) will be described.
In the measurer identification process of this embodiment, the registered user registered as a user is confirmed in the user information storage unit 41 (or the measurement result history data 42), and the weight allowance value and the BI allowance corresponding to the confirmed number of people are obtained. get.
Then, the difference between each element (weight, BI) of the current measurement result and each measurement history of each registered user is obtained, it is determined whether it is within the range of the confirmed allowable value, and the measurement is performed based on the determination result. Which registered user or guest is recognized.

For example, in this measurement result, it is assumed that the body weight is 58.6 kg and the bioimpedance (BI) is 525Ω.
When the number of registered users is one, the weight allowable value is ± 5.0 kg and the BI allowable value is ± 160Ω. Therefore, the biological information measuring apparatus 1 has an allowable range of the measurement history when the measurement history weight of the registered user is in the range of 53.6 kg to 63.6 kg and the measurement history BI is in the range of 365Ω to 685Ω. It is judged that.
On the other hand, when there are a plurality of registered users (2 to 4 people), the allowable weight value is ± 2.0 kg and the allowable BI value is ± 100Ω. Therefore, the biological information measuring device 1 has an allowable range of the measurement history when the measurement history weight of the registered user is in the range of 56.6 kg to 60.6 kg and the measurement history BI is in the range of 425Ω to 625Ω. It is determined that it is within.

When there is one registered user, the measurer recognizes as a guest if it does not exist, and recognizes that the measurer is a registered user if there is a measurement history within an allowable range.
On the other hand, when there are a plurality of registered users, if there is no measurement history within the allowable range, the measurer recognizes that he is a guest. If there is a measurement history that is within the allowable range, the registered user whose measurement history value and measurement value are closest is recognized as a measurer.

FIG. 6 is a flowchart showing details of the measurer identification process in the second embodiment.
The meaning of each character used in the flowchart of FIG. 6 is as follows.
X: Number of registered users W: Current measurement result (weight)
WH: Measurement history body weight by user X WR: Body weight identification allowable weight (body weight allowable value)
I: Measurement result (BI)
IH: Measurement history impedance of user X IR: BI identification tolerance (BI tolerance)

The control unit 20 checks the number of registered users X registered in the user information storage unit 41 (step 30).
Then, the control unit 20 acquires the weight identification allowable weight (weight allowable value) WR and the BI identification allowable value (BI allowable value) IR defined in accordance with the confirmed number of registered users from the allowable range table 43. Then, it is stored in the RAM work area (step 31).

  And the control part 20 repeats the loop of steps 32-32-2 by the number of registered users (X). In this loop, recognition candidates are specified based on whether or not the difference between the current measurement result and each measurement history is within the allowable value range defined according to the number of registered users.

  The control unit 20 determines whether or not the current measurement result (body weight) W is within the range of WH ± WR (kg) (step 33). That is, the control unit 20 reads the latest (last measured) measurement history of the user X from the measurement result history data 42, and subtracts the value obtained by adding the weight identification allowable weight WR to the measurement history weight WH ( WH ± WR (kg)) is determined, and it is determined whether or not the current measurement result (body weight) W is within the range of both the determined values (within the allowable body weight range).

  If the current measurement result (body weight) W is within the weight tolerance (step 33; Y), the control unit 20 determines that the current measurement result (BI) I is IH ± IR (Ω ) Is determined (step 34). That is, the control unit 20 obtains a value (IH ± IR (Ω)) obtained by adding and subtracting the BI identification allowable value IR to the measurement history impedance IH of the registered user in the loop target, and this measurement result (BI ) It is determined whether or not I is within the range of both values obtained (within the BI allowable range).

In the present embodiment, the case where it is determined whether or not the current measurement result (body weight) W is within the range of WH ± WR (step 33) has been described. This determination is based on the absolute value of W−WH. This is a determination to confirm whether or not it is equal to or less than WR. Therefore, it may be determined whether or not the measurement history body weight WH by the user X is within a range of both values (W ± WR) obtained by adding and subtracting the weight identification allowable weight WR to the current measurement result (body weight) W. Good.
Further, the difference between the current measurement result (body weight) W and the measurement history body weight WH by the user X may be calculated, and the determination may be made based on whether or not the absolute value of the difference is equal to or less than the weight identification allowable weight WR. .
Also, instead of storing the current measurement values W and I as measurement results in the measurement result history 42 as they are, the W ± WR values are stored, and the measurement values W are stored in the measurer recognition process on and after the next time. It may be determined whether or not it is within the range of the finished W ± WR.
The above determination can be similarly modified for the determination (step 34) as to whether or not the current measurement result (BI) I is within the range of I ± IR.

When the current measurement result (BI) I is within the BI allowable range (step 34; Y), the control unit 20 sets the registered user X determined for the measurement history as a recognition candidate (step 35), and performs the next registration. Make a decision about the user.
On the other hand, when the current measurement result (body weight) W is outside the allowable weight range (step 33; N) and when the current measurement result (BI) I is outside the BI allowable range (step 34; N). In addition, the control unit 20 determines that the registered user X determined for the measurement history is not a candidate for recognition, and determines the next registered user.

When the loop of steps 32 to 32-2 for extracting recognition candidates is completed for all registered users, the control unit 20 determines whether or not there are recognition candidates among the registered users (step 36).
When there is no recognition candidate (step 36; N), the control unit 20 recognizes the current measurer as a guest (step 37), and returns to the main routine.

When there is a recognition candidate (step 36; Y), the measurer is specified (step 38).
That is, when the number of recognition candidates is 1, the control unit 20 identifies the recognition candidate as a measurer.
On the other hand, when the number of recognition candidates is plural, the control unit 20 determines that the recognition history impedance IH of each recognition candidate is closest to the current measurement result (BI) I, that is, the absolute value of IH-I is the highest. A recognition candidate of a small measurement history is identified to the measurer.
In addition, when there are a plurality of recognition candidates whose IH-I (absolute value) is the minimum value, a recognition candidate whose measurement history weight WH is closest to the current measurement result (weight) W, that is, WH-W The measurement candidate having the smallest absolute value is identified as a measurement candidate.

As described above, when there are a plurality of recognition candidates, the measurer is authorized by giving priority to the bioelectrical impedance instead of the weight for the following reason.
That is, while the weight varies greatly in the short-term depending on conditions such as the timing of measurement before and after meals and the presence or absence of overdrinking, the bioimpedance is a value that hardly changes depending on such conditions. .

  As described above, according to the present embodiment, in the case of recognizing the measurer based on whether the difference between the weight, the bioelectrical impedance, the past measurement history, and the allowable range is the allowable range, the allowable range when the number of registered users is 1 is set. Since the recognition is made wider than when there are a plurality of registered users, it is possible to more accurately distinguish the guest from the measurement in the measurement for one person.

The embodiments of the present invention have been described above. However, the present invention is not limited to the described embodiments and modified examples, and various modifications can be made within the scope described in each claim. is there.
For example, in the embodiment described above, the allowable range is defined by two classifications when the number of registered users is 1 and a plurality of registered users, but the plurality of cases may be further divided into a plurality. Even in this case, the allowable range becomes wider as the number of registered users is smaller.

FIG. 7 is an explanatory diagram showing the contents stored in the allowable range table 43 in this modification.
As shown in FIG. 7, in this modification, different allowable ranges are defined for each case of the number of registered users from 1 to a maximum of 4.
That is, when the number of registered users is one, the allowable weight value is ± 5.0 kg, the allowable BI value is ± 160Ω, and when the registered user is two, the allowable weight value is ± 4.0 kg, the allowable BI value is ± 140Ω, In this case, the allowable weight value is ± 3.0 kg, the allowable BI value is ± 120Ω, and in the case of four people, the allowable weight value is ± 2.0 kg and the allowable BI value is ± 100Ω.

As in this modification, it is not uniformly defined as in the embodiment described when there are a plurality of registered users, but the allowable range is narrowed as the number of users increases for the following reason.
That is, as the number of registered users increases, the range of overlap between the permissible ranges for the actual values (measured values) between the users increases. Therefore, the permissible range is narrowed and the overlap range is reduced as the number of people increases. This is to more accurately recognize the measurer while avoiding misrecognition with the guest.

In the embodiment and the modified example described above, both the body weight and the bioelectrical impedance are targeted for applying different permissible ranges depending on the number of registered users, but the bioelectrical impedance allowable range is irrespective of the number of registered users. A constant value (for example, 100Ω) may be used, and the allowable weight range may be defined by distinguishing between a case where the number of registered users is 1 and a plurality of registered users.
Since the bioimpedance is less likely to change than the body weight as described above, this was excluded from the target.

In the embodiment described above, the case where the recognition candidate is identified by comparing one measurement history with the current measurement value for each registered user X in the loop of steps 32 to 32-2 for identifying the recognition candidate has been described. . One measurement history includes both a case where only one measurement history is stored and a case where a plurality of measurements are made, which is the last measurement history.
On the other hand, when a plurality of measurement results are stored for each registered user, all or a plurality of measurement results may be targeted. In the case of targeting a plurality of cases, any of a predetermined number from the latest measurement history and a case of targeting a measurement history measured within a predetermined period from the current measurement date and time are possible.

When comparing a plurality of measurement histories with the current measurement result for each registered user, it is determined whether or not both the body weight and the bioimpedance are within an allowable range for all the plurality of target measurement histories. If there is at least one measurement history within the allowable range, the registered user X is set as a recognition candidate.
If there are a plurality of recognition candidates, the registered user having the largest number of measurement histories within the allowable range is specified as the measurer.

When there are a plurality of recognition candidates having the largest number of measurement histories, the recognition candidate whose measurement history impedance IH is closest to the current measurement result (BI) I, that is, the average of the absolute values of IH-I. A measurement history recognition candidate having the smallest value is specified as a measurer.
In addition, when there are a plurality of recognition candidates whose average value of IH-I (absolute value) is the minimum value, a recognition candidate whose measurement history weight WH is closest to the current measurement result (weight) W, that is, WH. -Recognize a measurement history candidate having the smallest average value of W (absolute value) as a measurer.

DESCRIPTION OF SYMBOLS 1 Biological information measuring device 10 Apparatus main body 11 Display part 12 Measuring electrode 13 Operation part 13a Up key 13b Down key 13c Clear key 13d Setting key 14 Power switch 15 Weight sensor 16 Push switch 31, 32 A / D conversion part 33 Date / time information Measuring unit 34 Communication unit 35 Audio output unit 40 Non-volatile memory

Claims (4)

A weight measuring means for measuring the weight of the measurer;
Bioimpedance measuring means for measuring the bioimpedance of the measurer;
User registration means for registering the user of the measurer;
Measurement history storage means for storing the measured body weight and bioelectrical impedance as a measurement history for each user;
User number confirmation means for confirming the number of users registered by the user registration means;
Tolerance range acquisition means for acquiring a weight tolerance range and a bioelectrical impedance tolerance range according to the confirmed number of users;
The measured body weight and bioelectrical impedance value are compared with the measurement history value stored for each user stored in the measurement history storage means, and a user whose difference is within the acquired allowable range is set as a recognition candidate. A recognition candidate identification means;
User recognition means for recognizing one user as a measurer from the identified recognition candidates,
The allowable range acquisition means acquires an allowable range when the number of confirmed users is 1, and a range wider than an allowable range when the number of users is plural.
The biological information measuring device characterized by the above-mentioned. When the number of confirmed users is plural, the allowable range acquisition unit acquires a wide allowable range as the number of users is small.
The living body information measuring device according to claim 1 characterized by things. The user recognition means recognizes, as a measurer, a recognition candidate whose biometric impedance is closest to the current measurement value when there are a plurality of identified recognition candidates.
The living body information measuring device according to claim 1 or 2 characterized by things. When there are a plurality of recognition candidates whose measurement history is closest to the current measurement value, the user recognition means recognizes a recognition candidate whose measurement history is closest to the current measurement value as a measurer.
The biological information measuring device according to claim 1, claim 2, or claim 3.

Images