CN2659334Y

CN2659334Y - Scale type human moisture and fat tester

Info

Publication number: CN2659334Y
Application number: CN 200320101148
Authority: CN
Inventors: 刘少凡
Original assignee: LIANTONG HOLDINGS CO Ltd
Current assignee: LIANTONG HOLDINGS CO Ltd
Priority date: 2003-10-09
Filing date: 2003-10-09
Publication date: 2004-12-01
Anticipated expiration: 2013-10-09

Abstract

The utility model reveals a human scale water-fat tester, comprising a display (1) and a button control keyboard (2). Two sensor electrodes (3) are arranged on the scale, the two sensor electrodes (3) are respectively connected with the electrode film (9), (10) of the circuit. One end of the chip oscillation film (6) is connected with a capacitor C1.The parallel connection is formed by thrilling the electrode film (9), (10), and then the parallel connection connects with the R3, and then connecting capacitor C1 comprise the oscillator circuit reflecting the oscillation frequency impedance of the human body (F).The circuit is simple in structure, easy to use and difficult to distort the signal and the circuit does not need the ADC chip with simple CPU processing. The utility model is widely fit for testing the water, the fat content of human body, especially for home use.

Description

Weighing scale formula moisture content fat tester

Technical field this utility model relates to a kind of weighing scale formula moisture content fat tester, more particularly, relates to and a kind ofly both can measure the human body body weight, also can measure the tester of human body moisture content and fat.

Background technology has two anthropoid moisture content fat testers in the prior art, and a class is that specialty is measured human body moisture content fat tester, only limits to medical institutions' use, and its mechanism's complexity and volume are big, are not suitable for family and use; Another kind of is domestic body fat tester, utilize biologic resistance to calculate the fat content of human body, because the water content of body fat mass in human body tissue is about 10%～20%, its bio-electrical impedance is bigger, and fat free tissue water content is about 70%～75%, its bio-electrical impedance is less, this specific character according to human body, a very little safe current can be passed through human body, measure the impedance value of human body, calculate the ratio of human body moisture content and fat content again in conjunction with sex, age, height and body weight etc.

With regard to measuring the human body resistance value, tester on the market mainly is to utilize the ADC technology that the electrical impedance of human body is calculated, and the substitution formula calculates the fat and the moisture content of human body then, makes in this way and tests, need carry out ADC with special chip and handle, method is loaded down with trivial details and cost is high.

Raising along with people's living standard, people all the more pay close attention to the healthy of oneself, owing to fat can cause diseases such as hypertension, diabetes and hyperlipidemia, people no longer only depend on and see that its fat or thin body weight judges health, need the use test instrument to measure the moisture content and the fat content of human body.

The summary of the invention the purpose of this utility model is to provide both a kind of both can measure body weight, also can measure the tester of human body moisture content and fat.

In order to achieve the above object, this utility model provides following technical scheme: design a kind of weighing scale formula moisture content fat tester, has circuit board in the scale, has pick off (8) in the circuit, have display (1) and button control panel (2) on the described weighing scale, two induction electrodes (3) are arranged on the scale body, and two induction electrodes (3) link to each other with electrode slice (9), (10) in the circuit respectively, in order to measure the impedance signal of human body.In a termination one capacitor C 1 of vibration chip (6), human body reflects the oscillating circuit of the frequency of oscillation (F) of human body impedance with capacitor C 1 formation one by electrode slice (9), (10) formed resistance and after R3 is in parallel.The frequency of oscillation of described oscillating circuit (F) can reflect the variation of human body impedance, is recorded the body weight (W) of human body in addition by the pressure transducer (8) of weighing scale, imports other parameter by button control panel (2), as height (H), age (A), sex (S), formula W %=f (H, W rule of thumb then, A, F, S) and Fat%=f (H, W, A, F S), calculates human body moisture content and fat content.

Operational approach of the present utility model is summarized as follows:

If need to measure body weight, energized on ﹠ off switch (4) is stood after band display (1) demonstration 8888 returns 0 on the scale, measures body weight stable back display (1) and demonstrates the human body body weight.

If will measure human body moisture content and fat content, press power switch key (4) energized, after selecting tested object,, import corresponding data by button control panel (2) earlier if not use the default data maybe need revise the data of having used, stand on barefoot then on weighing scale two electrodes (3), after microprocessor CPU records the human body body weight, then read human body impedance and be converted to the signal that shakes frequency, pass through empirical equation W%=f (H in conjunction with other data of being imported, W, A, F, S) and Fat%=f (H, W, A, F, S), calculate human body moisture content and fat content, and show by display (1) output result.

If do not stand in barefoot on the weighing scale in a kind of pattern in back, because two electrode slices (3) do not pass through through human body, display (1) will only can be exported body weight, and moisture content and fat will output error messages.

Compared with prior art, the utlity model has following tangible advantage: 1, simple in structure, make easily; 2, need not special-purpose ADC chip, CPU handles simple, and signal is difficult for distortion, thereby practical.

Be description of drawings of the present utility model below the description of drawings:

Fig. 1 is the structural representation of this utility model tester;

Fig. 2 is the circuit theory diagrams of this utility model tester.

Among Fig. 1～Fig. 2, the 1st, display, the 2nd, button control panel, the 3rd, faradism pole piece, the 4th, power switch key, the 5th, display, the 6th, oscillating circuit chip, the 7th, control panel key switch, the 8th, pressure transducer, 9～10th, electrode slice.

By specific embodiment this utility model is carried out more detailed description below the specific embodiment:

With reference to Fig. 1, tester has display (1) and button control panel (2), has two faradism pole pieces (3) on the shell;

With reference to Fig. 2, have display (5) and button control panel (7) on the weighing scale, two induction electrodes (3) among Fig. 1 link to each other with electrode slice (9), (10) in the circuit respectively, has pick off (8) in the circuit, in a termination one capacitor C 1 of vibration chip (6), human body reflects the oscillating circuit of the frequency of oscillation (F) of human body impedance with capacitor C 1 formation one by electrode slice (9), (10) formed resistance and after R3 is in parallel.Vibration chip (6) adopts phase inverter 7404, and CPU then adopts common microprocessor to get final product.

Claims

1, a kind of weighing scale formula moisture content fat tester, has circuit board in the scale, has pick off (8) in the circuit, it is characterized in that: have display (1) and button control panel (2) on the weighing scale, two induction electrodes (3) are arranged on the scale body, two induction electrodes (3) link to each other with electrode slice (9), (10) in the circuit respectively, in a termination one capacitor C 1 of vibration chip (6), human body reflects the oscillating circuit of the frequency of oscillation (F) of human body impedance with capacitor C 1 formation one by electrode slice (9), (10) formed resistance and after R3 is in parallel.