<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Impedance measurements that involve the human body are affected by the capacitance between the body and earth ground. This paper describes a fast method to estimate that capacitance at 10 kHz, which is valid for impedance analyzers intended to measure ungrounded impedances. The method does not require any external component other than two common capacitors and two conductive electrodes in contact with the body.</p></abstract>

Impedance measurements that involve the human body are affected by the capacitance between the body and earth ground. This paper describes a fast method to estimate that capacitance at 10 kHz, which is valid for impedance analyzers intended to measure ungrounded impedances. The method does not require any external component other than two common capacitors and two conductive electrodes in contact with the body.

A fast method to estimate body capacitance to ground at mid frequencies

Journal of Electrical Bioimpedance

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"A fast method to estimate body capacitance to ground at mid frequencies"}

Impedance measurements that involve the human body are affected by the capacitance between the body and earth ground. This paper describes a fast method to...

Subject	C_HLu (pF)	C_gu (pF)	C_HLd (pF)	C_gd (pF)
1	22.5	95.4	18.2	153.0
2	23.5	85.1	17.8	159.7
3	24.8	72.9	20.5	119.2
4	25.5	66.8	20.2	123.2

Subject	Height (m)	Weight (kg)	BMI	Shoes’ outsole and type
1	1.90	130	36	Rubber, sports shoes
2	1.80	90	28	Leather dress shoes
3	1.66	65	24	Rubber, boots with 4 cm heel
4	1.50	42	19	Leather, boot with 7 cm heel

Subject	C_HLu (pF)	C_gu (pF)	C_HLd (pF)	C_gd (pF)
1	22.4	96.5	18.0	156.3
2	23.4	86.1	17.8	159.7
3	25.0	71.1	20.2	123.2
4	25.8	64.3	19.8	128.6

A fast method to estimate body capacitance to ground at mid frequencies

Article Category: Articles

Publié en ligne: 18 déc. 2015

Pages: 33 - 36

Reçu: 28 nov. 2015

DOI: https://doi.org/10.5617/jeb.2569

Mots clés
Human body capacitance, stray capacitance, impedance measurement error

© 2015 Carles Aliau-Bonet, Ramon Pallas-Areny, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig.1

Fig.2

Fig.3

Capacitance CHL measured with the 4294A impedance analyzer and calculated body capacitance to ground Cg for the four subjects and two feet heights above to ground: 10 cm (u) and direct outsole contact (d).

Data from the measured subjects. BMI is the body mass index (kg/m2).

Capacitance CHL measured with the MT4080 LCR meter and calculated body capacitance to ground Cg for the four subjects and two feet heights above ground: 10 cm (u) and direct outsole contact (d).

A fast method to estimate body capacitance to ground at mid frequencies

Article Category: Articles

Publié en ligne: 18 déc. 2015

Pages: 33 - 36

Reçu: 28 nov. 2015

DOI: https://doi.org/10.5617/jeb.2569

Mots clésHuman body capacitance, stray capacitance, impedance measurement error

© 2015 Carles Aliau-Bonet, Ramon Pallas-Areny, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig.1

Fig.2

Fig.3

Capacitance CHL measured with the 4294A impedance analyzer and calculated body capacitance to ground Cg for the four subjects and two feet heights above to ground: 10 cm (u) and direct outsole contact (d).

Data from the measured subjects. BMI is the body mass index (kg/m2).

Capacitance CHL measured with the MT4080 LCR meter and calculated body capacitance to ground Cg for the four subjects and two feet heights above ground: 10 cm (u) and direct outsole contact (d).

Mots clés
Human body capacitance, stray capacitance, impedance measurement error