公开(公告)号：US20190376877A1

公开(公告)日：2019-12-12

申请号：US16406634

申请日：2019-05-08

Applicant: Microjet Technology Co., Ltd.

Inventor： Hao-Jan MOU ,  Shih-Chang CHEN ,  Chiu-Lin LEE ,  Ching-Sung LIN ,  Chi-Feng HUANG ,  Yung-Lung HAN ,  Chun-Yi KUO

IPC: G01N1/14 ,  G01N33/00 ,  F04B43/04

Abstract: A portable gas detecting device includes at least one detecting chamber, at least one gas sensor and at least one actuator. The gas sensor is disposed in the detecting chamber and configured for monitoring gas inside the detecting chamber. The actuator is disposed in the detecting chamber and includes a piezoelectric actuator. When an actuating signal is applied to the piezoelectric actuator and the piezoelectric actuator generates a resonance effect, the gas outside the detecting chamber is introduced into the detecting chamber for sampling. The actuator is driven by an instantaneous sampling pulse to control a trace of gas to flow into the detecting chamber for forming a stable airflow environment. In the stable airflow environment, a gas molecule is dissolved in or bonded to a reaction material on a surface of the gas sensor for reacting.

公开(公告)号：US20190187035A1

公开(公告)日：2019-06-20

申请号：US16181911

申请日：2018-11-06

Applicant: Microjet Technology Co., Ltd.

Inventor： Hao-Jan MOU ,  Shih-Chang CHEN ,  Jia-Yu LIAO ,  Yung-Lung HAN ,  Chi-Feng HUANG ,  Chang-Yen TSAI ,  Chiu-Lin LEE ,  Hsuan-Kai CHEN ,  Wei-Ming LEE

IPC: G01N15/02 ,  G01N15/06

CPC classification number: G01N15/0211 ,  G01N1/2273 ,  G01N15/06 ,  G01N2015/0046 ,  G01N2015/0693 ,  G01N2021/151

Abstract: A particulate matter measuring device includes a gas transporting actuator, a micro particle sensor and a laser module. The micro particle sensor is disposed corresponding in position to the gas transporting actuator. The laser module is disposed between the gas transporting actuator and the micro particle sensor and emits a laser beam between the gas transporting actuator and the micro particle sensor. The air flowing between the gas transporting actuator and the micro particle sensor is irradiated by the laser beam. The micro particle sensor analyzes sizes of suspended particles in the air and calculates concentrations of the suspended particles. The air is ejected at high speed by the gas transporting actuator to perform a cleaning operation on a surface of the micro particle sensor so as to remove the suspended particles on the surface of the micro particle sensor and maintain accuracy of the micro particle sensor.