KR20040086886A - A digital scale for home use - Google Patents

Abstract

PURPOSE: A digital scale for home use is provided to give health care information to a family of a user as well as a user after recording their maximum weights and their minimum weights with precision by using a weight detecting unit, an amplifier, and a display unit. CONSTITUTION: A digital scale for home use includes a weight detecting unit, an amplifier(204), an analog to digital converter(206), a display unit, a key inputting part(208), and a data storing unit. The weight detecting unit detects a weight of a user and converts the weight into a corresponding electrical signal. The amplifier(204) amplifies an output of the weight detecting unit. The analog to digital converter(206) converts the output of the amplifier into a digital signal. The display unit displays a weight, a letter, and a graphic. The key inputting part is used for inputting keys according to manipulation of a user.

Description

A digital scale for home use {A digital scale for home use}

The present invention relates to a digital scale, and more particularly, to a digital scale for home use that can record the weight information of the family to obtain a variety of health-related information.

Recently, Western diets such as obesity have increased due to the advancement of diet, and as the scale is widely used for health care, each family is equipped with a scale.

By the way, the conventional analog scale has a problem that it is inconvenient because the accuracy is low and the scale should be read for reading, and a digital scale (or electronic scale) employing a load cell has been developed to solve this problem.

However, the conventional digital scale has a problem that the function is simple because only the measured value is displayed numerically, and the digital scale for health care needs to be connected to additional equipment such as a computer.

The present invention has been proposed to solve the above problems, and its object is to provide a digital scale for home use that can provide various weight-related health information as well as weight in a compact configuration.

1 is a perspective view of a digital scale for home use according to the present invention;

2 is a block diagram showing the configuration of a digital scale for home use according to the present invention;

3 is a flow chart illustrating an operation procedure of a home digital scale according to the present invention;

4 is a detailed flowchart illustrating a user registration process shown in FIG. 3;

5 is a detailed flowchart illustrating a registered user measurement process illustrated in FIG. 3;

FIG. 6 is a detailed flowchart illustrating a non-registered user measurement process illustrated in FIG. 3;

FIG. 7 is a detailed flowchart showing the record reading process shown in FIG.

* Explanation of symbols for main parts of the drawings

110: scale scale 120: display unit

131 ~ 139: key 202: weight sensor

204: amplifier 206: analog-to-digital converter

208: key input unit 210: microprocessor

212: LCD driver 214: LCD

216: Ypyrom 218: battery

220: voltage monitoring unit

In order to achieve the above object, the household digital scale of the present invention comprises: load sensing means for detecting a load and converting it into a corresponding electrical signal; An amplifier for amplifying the output of the load sensing means; An analog to digital converter for converting the output of the amplifier to digital; A display for displaying weight, text or graphics; A key input unit for inputting a user's operation; Storage means for storing data; And classify the data input by the user in the user registration mode according to the key input of the key input unit in the storage means, and store the weight data of the user input from the analog-digital converter in the measurement mode to the display. In addition to displaying and storing in the storage means, characterized in that it comprises a control unit for controlling to display on the display the weight-related information of the user recorded in the storage means in the browsing mode.

The home digital scale further includes a voltage monitoring unit for monitoring a voltage state of a battery and providing a battery state to the controller.

The user registration mode registers user information such as gender, age, height, target weight, other body size, and weight of the user, and the user measurement mode includes a registered user measurement process for measuring the weight of the registered user, and a non-registrant. It is divided into a simple measurement process that simply measures the weight of the, the reading mode shows the difference between the pre-stored daily maximum weight, daily minimum weight, target weight, standard weight, direct weight in the form of a graph.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an example of a home digital scale according to the present invention.

Referring to FIG. 1, the scale according to the present invention includes a scaffold 110 that rises to measure weight, a display 120 that displays various information such as a weight value, and switches 131 to 139 for manipulation. Is done. Such a home digital scale is small and light and easy to move, and the base 140 is attached to be easily supported on the floor.

Figure 2 is a block diagram showing the configuration of a home digital scale according to the present invention, the digital scale of the present invention is a weight sensor 202, amplifying unit 204, analog-to-digital converter 206, key input unit 208 , Microprocessor 210, LCD driver 212, LCD 214, nonvolatile memory 216, battery 218, and voltage monitor 220.

Referring to FIG. 2, the weight sensor 202 is a load cell for weighing, and the load cell converts the load into a deformation of the elastic body and then converts the deformation into an electrical signal and outputs the electrical signal. That is, the load cell detects the magnitude of the load (force) as an electrical signal by measuring the change in resistance of the strain gauge attached to the surface of the sensing unit by detecting the elastic deformation of the load cell detection unit generated when the load (force) is applied. The load sensor method used here is a self-oscillating or dynamic transducer using piezo phenomena and a non-magnetic oscillating type such as strain gauge. The most widely used method is a strain gauge type load cell. The strain gauge load cell consists of four strain gages and forms a bridge circuit, and then applies a voltage to detect and output a change in resistance depending on the load.

The amplifier 204 is implemented using an operational amplifier, and amplifies a minute load signal output from the load cell and removes noise through filtering. The amplified and noise-free analog load signal is converted into digital load data by the analog-to-digital converter 206 and then input to the microprocessor 210.

The key input unit 208 includes a set key for user registration, an up key for increasing and decreasing data, a down key, four user number keys, a guest key, and a previous data view key. Enter the desired operation.

The LCD driver 212 and the LCD 214 display an operation process, a weight, a body mass index, various graphs, etc. under the control of a microprocessor (MCU) 210.

The microprocessor (MCU) 210 performs a predetermined function as described later according to the operation of the key input unit 208 and stores the load data input from the analog-to-digital converter 206 in the nonvolatile memory 216, The capacity of the battery 218 can be displayed on the LCD 214 according to the monitoring data input from the voltage monitoring unit 220. At this time, the microprocessor 210 displays the operation state, weight, various health information, and the charging state through the LCD driver 212 on the LCD 214.

The nonvolatile memory 216 is configured as an EEPROM or a flash memory to store body information and various measurement data registered by a user, and the voltage monitoring unit 220 detects the state of charge of the battery 218 and thus the microprocessor 210. Report to.

3 is a flow chart illustrating an operation procedure of a home digital scale according to the present invention.

Referring to FIG. 3, the home digital scale according to the present invention includes a process of registering a user (301, 302), a measurement process of measuring weight (303-306), and a reading process (307) of reading a user's record that has already been measured. The measurement process is divided into a registered user measurement process 305 for measuring the weight of the registered user and a simple measurement process 306 for measuring the weight of the non-registered user. This process allows the user to select and operate the keys of the key input unit 208.

FIG. 4 is a detailed flowchart illustrating a user registration process shown in FIG. 3.

The user registration process is a process for distinguishing users and inputting physical information of each user when performing health care using a home digital scale according to the present invention. You can enter. This limitation is just one example, and the number of users can be increased as needed.

Referring to FIG. 4, when the setting key is pressed for a long time, a user selection is displayed on the LCD screen. Accordingly, the user selects one of the user keys 1 to 4 in the key input unit 208. When the user number is selected, the selected user number icon is displayed on the screen (401, 402).

Subsequently, an indication for selecting "male" and "female" is displayed on the screen. Accordingly, a male or a female is selected through the key input unit, and an age is input according to the indication of the screen for inputting "age" (403, 404).

When the height input icon is displayed on the screen, the height information is input (405). A basic height (eg, 160.6 Cm) is displayed on the screen for inputting the height information. When a desired height value is displayed using the up / down keys, the setting key is pressed to input a height value.

Then, when the target input icon is displayed on the screen, the target weight is input (406). The basic target weight (for example, 60Kg) is displayed on the screen for inputting the target weight, and when the desired target weight value is displayed using the up / down keys, the user presses a setting key to input his / her target weight value.

Then, when the weight icon is displayed on the screen, the user inputs the weight of the clothes he wears when measuring his weight (407). For clothes weight input, the basic clothes weight (eg, 0.00Kg) is displayed on the screen, and when the desired weight is displayed using the up / down keys, the setting key is pressed to input the weight of the clothes. When the weight is set in this way, the value lost by the set weight is displayed from the value measured when the weight is measured in the registered user's weight measurement process.

When the user registration process is completed, the method automatically returns to the weight measurement mode (408).

FIG. 5 is a detailed flowchart illustrating the registered user weight measurement process illustrated in FIG. 3.

The registered user weight measurement process is a process in which a user who has already registered through the user registration process described above measures his or her weight.

First, the user's key to which his information is input is pressed (501). Accordingly, when the power is turned on, the user's user number is displayed and the current state is displayed as the initialization proceeds (502). In the current state, it displays the user number, weight application, difference between the previous weight and the target weight, battery error, balance value shake error, and the like.

If the initialization is normally completed, the "0.00Kg" and "OK" icon is displayed on the screen, and if the weight is set, the weight icon is also displayed (503). When the weight icon is displayed, the value minus the weight is displayed.

Subsequently, when the user climbs on the scale for weighing, the current weight is displayed on the screen, and the OK icon is turned off until it is stabilized (504,505). When the weight is stabilized, the weight is fixed, and the OK icon turns on again to indicate that the weight is finished.

After the weight measurement, the Body Mass Index (BMI) is displayed on the screen as numbers and bar graphs, and the percentage of body fat is displayed (506). Body weight, body mass index, and body fat percentage are displayed continuously while the user is on the scaffold.

Here, the body mass index (BMI) is a weight obtained by dividing the weight (unit: Kg) by the height (unit: m) squared, which has a high correlation with the amount of fat in the body, which is a criterion for determining obesity. Obesity index. Normally, if the body mass index is less than 18.5, it is determined to be underweight, 18.5 to 22.9 is considered normal, 23 to 24.9 is considered to be dangerous weight, and if it is 25 or more, obesity is determined. The percentage of body fat represents the percentage of body fat in the body weight, and the body fat in the body composition of adults is 15-30%. It is known to be less than ~ 27%.

When the weight measurement is finished and the user stepped off the foothold, the difference between the user's last weight and the target weight is displayed on the screen (507,508). The weight difference icon is displayed on the screen to show the difference with the last weight, and the target difference icon is on when the difference with the target weight is displayed.

Subsequently, after displaying analysis information such as daily maximum weight and minimum weight, power is automatically turned off (509).

FIG. 6 is a detailed flowchart illustrating a non-registered user's weight measurement process illustrated in FIG. 3.

Referring to FIG. 6, when only the weight is measured or the non-registrant measures the weight, the guest key is pressed and held (601) while the home digital scale according to the present invention is turned off.

The guest icon appears on the screen while the power is on, and the initialization process (zero adjustment) is performed while the bar graph moves (602).

Subsequently, if the initialization process is successful, the "0.00Kg" and "OK" icons are displayed on the screen (603).

When the user climbs on the scale for measurement, the screen displays the current weight and the OK icon turns off until it stabilizes. When the weight is stabilized, the weight is fixed and the OK icon is turned on again to indicate that the weight measurement is completed (604 to 606).

When the user gets off the scaffold, the screen flashes three times and then automatically turns off (607).

FIG. 7 is a detailed flowchart illustrating a recording viewing process shown in FIG. 3.

The weight value measured in the weight measurement process as described above is classified by the corresponding user number and stored cumulatively in the nonvolatile memory. In other words, a person's weight can have various values in one day, and for accurate analysis, several measurements must be made in a day. At this time, it is possible to store the representative value and the total value by storing the weight value. The representative value storing method is to extract and store several values to help analysis from the weight values measured per day, The value storage method is to save all measured data.

Representative values useful in the storage of representative values include daily maximum weight / lowest weight, average value, initial / final value, and the latest 10 data. The daily maximum / minimum weight stores the highest and lowest weight of the day, and the maximum and minimum weights help to analyze the weight in relation to the eating and exercise habits of the subject. You can also help maintain your weight by adjusting your weight so that your target weight is between your daily and minimum weight. The average value is a method of storing the measured record as a daily average, and the initial / final value is a method of storing only the first measured data and the last measured data of the measured data per day. The 10 most recent data storage methods store only the last 10 of the measured values several times a day.

Referring to FIG. 7, the record viewing process is a process for viewing the stored data as described above. In order to view the previous record, the user presses the “view previous data” key while the scale is turned off (701).

If the "View previous data" icon is displayed when the power is turned on, pressing the user number key to be viewed is selected (702). The user's icon is displayed and the user's record is displayed. The record reading basically displays the daily maximum weight, the daily minimum weight and the target weight, and displays additional data by switching the screen. At this time, the daily maximum weight, the daily minimum weight, the target weight, and the standard weight are displayed in a graph so that the user can easily analyze the weight change (703, 704).

If there is no key input for a predetermined time or the "View previous data" key is pressed, the power is cut off and the operation ends (705).

As described above, according to the present invention, not only measures the user's weight but also records the weight of the family member by member and then displays the daily maximum weight, daily minimum weight, preventive body weight, body fat rate, target weight, and the like. It provides an effect that can be used as information. In addition, the home digital scale of the present invention can measure weight to a fine range and have high measurement accuracy, and can display analysis information graphically through the LCD and can provide various additional functions such as dressing and measuring.

Claims (6)

Load sensing means for detecting a load and converting the load into a corresponding electrical signal; An amplifier for amplifying the output of the load sensing means; An analog to digital converter for converting the output of the amplifier to digital; A display for displaying weight, text or graphics; A key input unit for inputting a user's operation; Storage means for storing data; And According to the key input of the key input unit, the data input by the user in the user registration mode is classified for each user and stored in the storage means, and the weight data of the user input from the analog-digital converter in the measurement mode is displayed on the display. And storing in the storage means and controlling the display to display the weight related information of the user recorded in the storage means on the display in the reading mode. The digital scale of claim 1, wherein And a voltage monitoring unit for monitoring a voltage state of a battery and providing a battery state to the control unit. The method of claim 1, wherein the user registration mode is A digital scale for home use, which registers the user's gender, age, height, target weight, weight, and the like. The method of claim 1, wherein the user measurement mode is A digital scale for home use, characterized in that it is divided into a registered user measurement process for measuring and analyzing the weight of the registered user, and a simple measurement process for simply measuring the weight of the non-registrant. The digital weighing apparatus according to claim 4, wherein the registered user measuring process includes a weight removing function that displays the registered weight except for the registered weight when the weight is registered. The method of claim 1, wherein the reading mode is Digital scale for home, which shows the daily maximum weight, daily minimum weight, target weight, and standard weight saved by user in graph form.