NOx sensor chip detection circuit
The invention discloses a NOx sensor chip detection circuit comprising a power source module, a triggering module, and a main pump detection circuit, an auxiliary pump detection circuit and a measuring pump detection circuit which are connected in parallel. The power source module is respectively co...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a NOx sensor chip detection circuit comprising a power source module, a triggering module, and a main pump detection circuit, an auxiliary pump detection circuit and a measuring pump detection circuit which are connected in parallel. The power source module is respectively connected with the triggering module, the main pump detection circuit, the auxiliary pump detection circuit, and the measuring pump detection circuit. The control end of the triggering module is respectively connected with the main pump detection circuit, the auxiliary pump detection circuit, and the measuring pump detection circuit. The circuit provided by the invention is used for detecting the performance of a NOx sensor chip, and can respectively simultaneously detecting a main pump, an auxiliary pump, and a measuring pump. Nernst voltages of the pumps can be accurately measured with the combination of an oscilloscope. Whether the detected NOx sensor chip is qualified is determined according to the detected Nerns |
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