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1. (WO2018219608) ELECTROSTATIC PARTICLE SENSOR UNIT HAVING A HEATED ELECTRODE

Pub. No.:    WO/2018/219608    International Application No.:    PCT/EP2018/061918
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Wed May 09 01:59:59 CEST 2018
IPC: G01N 15/06
G01N 15/00
Applicants: ROBERT BOSCH GMBH
Inventors: RUSANOV, Radoslav
BODE, Niels
GENTER, Simon
HEEREN, Imke
TIEFENBACH, Andy
SCHITTENHELM, Henrik
ROHLFING, Franziska
KREBS, Daniel
Title: ELECTROSTATIC PARTICLE SENSOR UNIT HAVING A HEATED ELECTRODE
Abstract:
The invention relates to a particle sensor unit (10) having a measuring chamber (12) and a control unit (14), wherein at least one electrode pair having two electrodes (22, 24) is arranged in the measuring chamber (12), and wherein the control unit (14) has a high-voltage source (26) which is connected to the electrodes (22, 24) and which generates an electrical voltage prevailing between the two electrodes (22, 24), and wherein the control unit (14) has a current measuring device (36), which measures an electric current flowing between the two electrodes (22, 24) and carried by charged particles (23) or dendrites (34) made of particles (23). The particle sensor unit is characterized in that at least one of the two electrodes (22, 24) has a heating element (28, 30), which is thermally coupled to one of the two electrodes (22, 24) and is controlled by the control unit (14).