KR100517311B1 - A digital scale for public - Google Patents

Abstract

The present invention relates to a digital weighing scale for public use, the present invention comprises a load sensing means; An amplifier for amplifying the output of the load sensing means; A filter unit for removing noise from an output of the amplifier; An analog to digital converter for converting the output of the filter unit into digital; Liquid crystal displays for displaying weight, text and graphics; A key input unit for inputting a user's operation; Rom replaces standard weight data of Koreans by gender and age; A data storage unit for storing a user database DB; And when the power is turned on, the DB manager is executed, and when the user measures the weight, the digital weight data inputted from the analog-to-digital converter is processed and displayed as the current weight on the liquid crystal display, and a mode selection message is output for the user's selection. And a control unit for executing the corresponding mode and controlling the weight analysis result to be displayed on the liquid crystal display. Therefore, the present invention not only measures the weight of the user, but also when the user inputs body information such as gender, age, height, etc., the body mass index, standard weight, obesity degree, etc. can be used as information for health care by displaying analysis information. To be able.

Description

Public Digital Scale {A digital scale for public}

The present invention relates to a digital weight scale, and more particularly, to a digital weighing scale for public that displays weight-related health information immediately when a user number or user body information is input at the same time.

In recent years, Western diets such as obesity have increased due to the advancement of diet, and therefore, scales are widely used in public facilities such as baths, saunas and hospitals for health care.

By the way, the conventional analog scale had a problem of inconvenience because the precision was low and the scale had to be read for reading, and a digital scale (or electronic scale) employing a load cell was developed to solve this problem.

However, conventional digital scales are simple because they only display measured values numerically, and digital scales for health care are expensive because they need to be connected to additional equipment such as computers. There is a problem that the error of the measured value is severe.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a digital scale for public use that can provide a high precision and immediately provide various weight-related health information as well as weight.

In order to achieve the above object, the public digital weight scale of the present invention comprises: a 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; A filter unit for removing noise from an output of the amplifier; An analog to digital converter for converting the output of the filter unit into digital; Liquid crystal displays for displaying weight, text and graphics; A key input unit for inputting a user's operation; Rom replaces standard weight data of Koreans by gender and age; A data storage unit for storing a user database DB; And when the power is turned on, the DB manager is executed and the initialization is performed. When the user measures the weight after initialization, the digital weight data inputted from the analog-to-digital converter is processed and displayed as the current weight on the liquid crystal display. And a control unit for outputting the control unit to execute the mode according to the user's selection and to display the weight analysis result on the liquid crystal display.

Here, the mode is divided into a user registration mode, a registered user mode, and a one-time analysis mode. In the one-time analysis mode, a body information input request message is displayed and a user displays a gender, age, height according to the display of the liquid crystal display. If you enter, etc., the user's body mass index and the degree of obesity are calculated and compared with the pre-stored standard weight. In the registered user mode, when a user who has already registered enters a user number and a password, the user database is read and compared with standard body information to display the analysis result in graphic or text form.

In addition, the DB manager searches the user DB and deletes the corresponding user number database if there is a non-user for a certain period of time, and if the allocated DB capacity for each user is insufficient, deletes old records of the user to secure a storage space, and makes a temporary DB. Read weight record by user number from user and select representative value to record only one representative weight for the same date and same user number in the corresponding user database.

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 digital weighing scale for public use according to the present invention.

Referring to FIG. 1, a public digital scale according to the present invention includes a scaffold 110 that rises to weigh a body, a display unit 130 that displays various information such as a weight value, and a display unit 130. It consists of a support 120 for supporting in a vertical direction with respect to the scaffold for easy viewing, the keypad 140 for operation, the printer 150 for printing the analysis results. Such digital scales for public use are made in a sturdy and convenient place by being placed in a space that can be used by many people, such as a public bath, a sauna, and a hospital.

Figure 2 is a block diagram showing the configuration of a public digital scale according to the present invention, the public digital weight scale of the present invention is a load cell 202, an amplifier 204, a filter unit 206, an analog-to-digital converter ( ADC: 208, microprocessor (MCU: 210), numeric pad 212, input key 214, zero key 216, print key 217, male key 218, red key 220, LCD driver ( 222, LCD 224, backlight 226, data storage 228, power supply 230, ROM 232, and printer 150.

Referring to FIG. 2, the load cell 202 is a weighing device. Since there is no physical phenomenon of directly converting a physical quantity such as a load or a force into an electrical signal, the load is converted into a deformation of the elastic body and the deformation It converts the signal into a normal signal. That is, the load cell 202 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 detector generated when the load (force) is applied. The load sensor method used here is a self-oscillating or dynamic transducer using piezoelectric phenomenon 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, amplifies the minute load signal output from the load cell 202, the filter unit 206 removes the noise contained in the load signal. The amplified and noise-free analog load signal is converted into digital load data by the analog-to-digital converter 208 and then input to the microprocessor 210.

Numeric pad 212 is a keypad from 0 to 9 for inputting the age, height, etc. for the user's weight analysis, input key 214 is an enter key for inputting various values, male key 218 and yoki 220 is a key for inputting male or female gender information. The zero key 216 is a key for instructing zero adjustment as necessary, and the printer key 217 is a key for printing an analysis result.

The microprocessor 210 performs initialization when the power is turned on, and when the user climbs on the scale of the scale, the LCD driver 222 calculates the weight using load data input from the analog-to-digital converter 208 and displays the weight on the LCD 224. The controller controls the LCD driving unit 222 to calculate and display various health information in comparison with the pre-stored standard weight according to the body information input by the user.

The LCD driver 222 and the LCD 224 display various operation states and messages under the control of the microprocessor 210, display user input values, and display weight related analysis information. The backlight 226 is turned on under the control of the microprocessor 210 to make it easy to see the information displayed on the LCD screen.

The data storage unit 228 is a large memory, such as a hard disk, and stores user information such as a user number, a password, and body information input at the time of user registration and a previous weight record of the user.

ROM (232) stores the standard body information (standard weight, standard height, etc.) of Korean male and female ages, and can be used to calculate various indices. If is changed, it can be updated by replacing it.

The printer 150 prints analysis information when the user presses the print key 217 as a label printer, and the power supply unit 230 rectifies the commercial AC power to provide various DC power required by the circuit.

3 is a flowchart illustrating an operation procedure of the public digital scale according to the present invention.

When the power is applied for the first time, the LCD screen displays the message "Please wait ..." and initializes with the DB manager (301 ~ 303). The DB manager is a procedure for automatically managing a user's DB, as described later, and performs zeroing and the like in the initialization stage.

After the initialization is completed, the screen displays "0.00 Kg" along with the message "Please step on the scale" as shown in FIG. 6 (304). This user standby state is a normal state in which initialization is completed and waiting for measurement.

Then, when the user climbs on the scaffold, the weight is displayed and the current weight is stabilized. When the weight is stabilized, the current weight is displayed and the current weight is displayed continuously and "If you want to analyze the weight, enter the desired number. If you are a registered user, enter "1". If you want to analyze your current weight without registering, enter "2". To register, enter "3". " 307).

At this time, the user who wants to measure only the weight goes to the user standby state as shown in FIG.

When the user selects the "No. 1" registered user mode for weight analysis, the user is prompted to enter a user number and password, and the user number and password are input to check whether they match the pre-registered password (309 ~ 312). ). If the result of the check is matched, the user's database is read (313).

Subsequently, the user's previous data is displayed in graph form (314), and the user's weight is compared with the Korean's standard weight, and various weight-related health information is displayed in text or graphics, and the user presses the printer key (217). If you enter, print the analysis results (319 ~ 321). Subsequently, when the user gets off the scaffold, the screen is reset and the user waits. At the same time, the current weight of the user is stored in the temporary database along with the date / time information and the user number. In this way, the temporary database is stored in one representative value (eg, daily minimum weight) when the same user measures several times on the same date.

When the user wants to analyze the weight once, and selects "analysis once", as shown in FIG. 7, the gender icon on the LCD screen is turned on, and the user inputs the gender (male or female) key ( 218 or 220) to input male or female (314,315).

Accordingly, the male or female gender icon is fixed, and the kidney icon is displayed as shown in FIG. 8. In this case, the user inputs the height of the user to one decimal place by using the numeric keys 212 of the keypad (316).

Accordingly, the height icon is fixed, and as shown in FIG. 9, when the age icon is turned on, the age is input using the numeric keys 212 of the keypad (317).

When the body information input is completed as described above, the body mass index of the user is displayed as numbers and bar graphs as shown in FIGS. 10 and 11 in the analysis result display step, and after a while, the LCD screen is automatically converted to the standard weight and standard. The difference with the body weight, the obesity degree, etc. are displayed (318).

Here, the body mass index (BMI) is a body weight index divided by the height squared, and has a high correlation with the amount of fat in the body, which is a criterion for determining obesity, and is a widely used obesity index. Usually, when the body mass index is less than 18.5, it is determined as 'underweight', 18.5 to 22.9 is determined as 'normal', and 23 to 24.9 as 'risk weight' and 25 or more as 'obesity'. Obesity is determined on the basis of the ratio of the current weight to the standard weight. When obesity is less than 80%, it is determined as 'severe weight loss', and if it is 80 to 90%, it is determined as 'lack of weight'. If it is ~ 110%, it is judged as 'normal', if it is 110% ~ 120%, it is 'overweight' and if it is 120% or more, it is determined as 'obesity'

When the user wants to print the analysis result, the print key 217 is pressed, and when the print key is input, the user prints the label of the analysis result (319, 320). Then, when the weight measurement is finished, the user stepped off the scaffold, as shown in Figure 6, the user is switched to the standby state waits for the next user to measure.

On the other hand, if the user selects the user registration by entering the number 3 in the mode selection step, and receives the user number and password, and then receives the user's body information to build a database of the user (323 ~ 325). In this case, the user goes through a process of checking when the user number is entered so that the user number is not duplicated.

FIG. 4 is a flowchart illustrating an operation procedure of the DB manager shown in FIG. 3.

Referring to FIG. 4, the DB manager is performed when the initial power-on or date is changed. DB manager searches the user DB and if there is an unused user DB for a certain period of time, deletes the user's database (DB) to secure storage space, and deletes the old record of the user if the DB capacity allocated to each user is insufficient ( 401-405).

Subsequently, the weight record for each user number recorded on the previous day is read from the temporary database (DB), the representative value (eg, daily minimum weight) is determined for each user, and the representative weight is recorded in the corresponding user DB (406 ~). 408).

FIG. 5 is a flowchart illustrating a procedure of manager mode shown in FIG. 3.

When the administrator mode execution key is input according to a predetermined method, the administrator password is input and confirmed, and when the passwords match, the user database can be operated in the administrator mode (501 to 504). The functions performed in the administrator mode are very diverse. For example, if you select "View", you can display and view the user database, select "Delete" to delete the user DB, and select "Change" to select the user. DB can be changed.

As described above, according to the present invention, in addition to simply measuring the user's weight, when the user inputs body information such as gender, age, height, etc., the body mass index, standard weight, obesity degree, and the like are displayed and analyzed information for health management. To be used as information for And when the user measures the weight after registering the user number and password, the weight scale of the present invention is cumulatively analyzed to the previous weight record and then displayed in a graphic or text, such as easy to see, standard weight information that is the standard of analysis It can be easily updated by saving as a replaceable ROM. In addition, the measurement accuracy is high by measuring the body weight to a minute range, and there is an advantage that it is easy to see the analysis information through the large LCD using the backlight.

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

2 is a circuit diagram showing a circuit of a public digital scale according to the present invention;

3 is a flow chart showing an operation procedure of the public digital scale according to the present invention,

4 is a flowchart illustrating an operation procedure of the DB manager shown in FIG. 3;

FIG. 5 is a flowchart showing a procedure of manager mode shown in FIG. 3;

6 is an example of an operation screen in the user waiting step shown in FIG. 3;

7 is an example of an operation screen in the gender input step shown in FIG. 3;

8 is an example of an operation screen in the decompression input step shown in FIG. 3;

9 is an example of an operation screen in the age input step shown in FIG. 3;

10 is an example of the display of body mass index in the analysis display step shown in FIG.

11 is an example of an obesity degree display in the analysis display step shown in FIG. 3;

* Explanation of symbols for main parts of the drawings

110: scaffolding 120: support

130: display unit 140: key input unit

202: load cell 204: amplification unit

206: filter unit 208: ADC

210: MCU 212: Numpad

214: input key 216: zero key

218: Namki 220: Yuki

222: LCD driver 224: LCD

226: backlight 228: data storage unit

230: power supply

Claims (4)

delete delete delete 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; A filter unit for removing noise from an output of the amplifier; An analog to digital converter for converting the output of the filter unit into digital; Liquid crystal displays for displaying weight, text and graphics; A key input unit for inputting a user's operation; Rom replaces standard weight data of Koreans by gender and age; A data storage unit for storing a user database DB; And When the power is turned on, the DB manager is executed and the initialization is performed. When the user measures the weight after the initialization, the digital weight data inputted from the analog-to-digital converter is processed and displayed as the current weight on the liquid crystal display, and a mode selection message is displayed. And a control unit for outputting to execute a mode according to a user's selection and to display a weight analysis result on the liquid crystal display. The DB Manager If the user DB is searched for the user DB for a certain period of time, the corresponding user number database is deleted. If the allocated DB capacity for each user is insufficient, the old record of the user is deleted to secure the storage space. Read and select the representative value public digital scale, characterized in that to record only one representative weight for the same date, the same user number in the corresponding user database.