JP2000093400A - Body fat measuring apparatus utilizing personal computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance input operability, memory capacity and expression capability traditionally insufficient by replacing a data processing part of a body fat measuring apparatus with a personal computer. SOLUTION: There are arranged a personal computer 1 and a human body impedance measuring means 2 for measuring a human body impedance through an electrode handle H. In this case, the personal computer 1 is constituted of a data input means 11 to input personal data of sex, age, stature and weight by operating a keyboard K or a mouse M, a body fat rate calculating means 12 to calculate a body fat rate based on a human body impedance measured by the human body impedance measuring means 2 and the personal data inputted from the data input means 11, a memory means 13 to store the body fat rate and the personal data into an external memory S at each measurement and a display means 14 to graphically display the body fat rate and the personal data on a color display D by editing them together with history in the past.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body fat measuring device for processing body fat measurement data using a personal computer.

[0002]

In the conventional body fat measuring device, the human body impedance is measured by holding the four terminal electrodes attached integrally with the left and right hands, and the gender is operated by operating a few simple keys. , Age, height, and weight,
The body fat percentage calculated based on these data is calculated as a small L
Many of them simply displayed numbers on the CD screen. In addition, due to insufficient memory capacity, there is no ability to save data, so you can compare measurement results with past data,
I could not see the time series change. Alternatively, since previously input data cannot be saved and recalled, it is necessary to replace the same data each time measurement is performed.

On the other hand, recent personal computers can easily input data while selecting menus by operating advanced software, a high-performance CPU, a large-capacity storage device, a keyboard, numeric keys, and a mouse. It has a wide variety of input means with excellent operability and abundant expressiveness through graphic display using a large color screen.

Accordingly, the present invention has been made to improve the input operability, storage capacity, and expression ability, which were insufficient conventionally, by replacing the data processing portion of the body fat measuring device with a personal computer. is there.

[0005]

In order to achieve the above object, the present invention is configured as follows.

That is, a human body impedance measuring means for measuring the human body impedance through a four-terminal electrode which makes conductive contact with the human body is linked to a personal computer, and the human body impedance measured by the human body impedance measuring means is inputted to the personal computer. Input means, personal data input means for inputting personal data of gender, age, height, weight, and body fat percentage calculating means for calculating a body fat percentage based on the human body impedance and personal data, a personal computer A body fat measurement device characterized in that the body fat measurement data is processed using the body fat measurement data.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a body fat measuring device using a personal computer embodying the present invention. The body fat measuring device comprises a personal computer 1 and a human body impedance measuring means 2 for measuring human body impedance via an electrode handle H.

The personal computer 1 operates a keyboard K or a mouse M to input personal data such as gender, age, height and weight, and a human body impedance measured by the human body impedance measuring means 2 and a data input means 11. A body fat percentage calculating means 12 for calculating a body fat percentage based on the personal data inputted by the user, a storage means 13 for storing the body fat percentage and the personal data in the external storage device S for each measurement, a body fat percentage and the personal data Is graphically edited together with the past history and displayed on the color display D.

The personal computer 1 and the human body impedance measuring means 2 are linked through a serial interface RS-232C. Alternatively, since only text data such as numerical values are input, a keyboard interface may be used instead of the RS-232C. Alternatively, data may be temporarily dropped on the floppy disk F and then input instead of being directly connected.

FIG. 2 is a schematic view of the electrode handle H.
The electrode handle H is mounted on the operation panel P at the center of the insulating frame.
Are provided on the left and right, and the power supply side electrodes H1, H1 and the detection side electrode H
2 and H2 are arranged to form a four-terminal electrode. An interval is provided between the power supply side electrodes H1 and H1 and the detection side electrodes H2 and H2 so as not to be in contact with each other. The operation panel P is L
A 7-segment numerical display section L of a CD is provided to display a measurement result, and a measurement start button B1 and a data transmission button B2 are arranged below the measurement result button.

FIG. 3 shows a block diagram of the human body impedance measuring means 2. The human body impedance measuring means 2
The 50 kHz sine wave AC voltage generated by the oscillator 21 is supplied to the power supply side electrodes H1, H1 of the electrode handle H via the drive circuit 22, the transformer T1, and the switch 23A.

The left and right ends of the electrode handle H are grasped with both hands, and the left and right palms are brought into contact with the power supply side electrodes H1, H1 and the detection side electrodes H2, H2, respectively. In this state,
When an AC voltage is applied to the power supply electrodes H1 and H1 by pressing the measurement start button B1, the detection electrodes H2 and H2 are passed through both hands.
An AC potential difference occurs in H2.

The AC potential difference generated at the detection side electrodes H2, H2 is converted into a DC voltage via a changeover switch 23A, a transformer T2, a bandpass filter 24, a rectifier circuit 25, and an amplifier 26, and the waveform is shaped, level adjusted, and offset adjusted. After doing
A / D converter 27, C via I / O interface 6
Input to PU4.

Before measuring the human body impedance, the output characteristics of the detection-side circuit are calibrated in advance in order to correct a measurement error due to a change over time or a temperature characteristic of the elements constituting the human body impedance measuring means 2. That is, the relationship between the human body impedance Z, which is two variables, and the AC voltage V detected by the detection-side circuit is applied to a regression line Z = kV + C0. Then, the same predetermined AC voltage as when measuring the human body impedance Z is applied to both ends of the two resistors R1 and R2 whose resistance values are known, and the AC voltage V generated at both ends of the resistors R1 and R2 is detected. The proportional constant k and the fixed constant C0 of the regression line are obtained.

For this reason, a control signal is output from the CPU 4 to switch the changeover switch 23A via the I / O interface 6, the changeover unit 28 and the changeover control circuit 29A, so that the secondary side of the transformer T1 and the primary side of the transformer T2 are connected. Between 2
The two resistors R1 and R2 are connected. Next, a control signal is output from the CPU 4 and the changeover switch 23 is switched via the I / O interface 6, the changeover unit 28, and the changeover control circuit 29B.
B is switched, and the measurement target is switched to the resistor R1 or the resistor R2.

When the measurement of the human body impedance is completed,
The measurement result is displayed on the display section L. When the measurement result is confirmed and the data transmission button B2 is pressed, the measurement result is input to the personal computer 1 via the RS-232C interface.

[0018]

As described above, the body fat measuring device using the personal computer of the present invention processes the measured body fat data using the personal computer. Therefore, according to the present invention, since the dedicated screen of the personal computer is prepared in advance, data such as sex, age, height, and weight can be easily and quickly input by operating the ten keys. Further, once data is input, it is not necessary to input the same data every time thereafter. Further, it is possible to easily compare the measurement result with past data and to see a time-series change.
In addition, due to its abundant expression ability, it will be possible to see measurement results in various forms such as tables and graphs in addition to numbers. In addition, since the function equivalent to the replacement of the personal computer becomes unnecessary, the mechanism of the body fat measuring device is simplified, and the cost is reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a body fat measurement device using a personal computer embodying the present invention.

FIG. 2 is a schematic view of an electrode handle.

FIG. 3 is a block diagram of a human body impedance measuring unit.

[Explanation of symbols]

 Reference Signs List 1 personal computer 11 data input means 12 body fat percentage calculating means 13 storage means 14 display means 2 human body impedance measuring means 21 oscillator 22 drive circuit 23 changeover switch 24 bandpass filter 25 rectifier circuit 26 amplifier 27 A / D converter 28 switching unit 28 29 Switching control circuit 4 CPU 6 I / O interface B1 Measurement start button B2 Data transmission button D Color display F Floppy disk H Electrode handle H1 Power supply side electrode H2 Detection side electrode K Keyboard L Display section M Mouse P Operation panel S External storage device T1 ~ T2 transformer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C027 AA06 CC00 EE03 EE08 FF01 FF02 GG00 HH01 KK00 KK03 KK05

Claims (1)

[Claims] A human body impedance measuring means for measuring a human body impedance through a four-terminal electrode which makes conductive contact with a human body is linked to a personal computer. The human body impedance which inputs the human body impedance measured by the human body impedance measuring means to the personal computer Input means, personal data input means for inputting personal data of gender, age, height, weight, and body fat percentage calculating means for calculating a body fat percentage based on the human body impedance and personal data, A body fat measurement device characterized by processing body fat measurement data using the same.