초록 ▼

A vegetable freshness sensor production method and a freshness keeping device using the sensor are disclosed. The sensor senses gases generated by vegetables, thus to not only sense freshness of the vegetables but also sense decayed state of the vegetables. The vegetable freshness keeping device app

A vegetable freshness sensor production method and a freshness keeping device using the sensor are disclosed. The sensor senses gases generated by vegetables, thus to not only sense freshness of the vegetables but also sense decayed state of the vegetables. The vegetable freshness keeping device appropriately controls temperature, pressure, humidity, O2/CO2 and quantity of anion in the vegetable store room in accordance with sensing result of the sensor, thus to keep freshness of the vegetables for a long time. In order to produce the gas sensor, a mixture of a metal catalyst and a sensing material is calcinated and mixed with an organic vehicle, thus to form a paste. The paste is coated on an electrode surface of an alumina substrate, thus to form a sensing layer on the substrate. The substrate, after being sintered, is subjected to a wire bonding and to a packaging, thus to form the gas sensor.

대표청구항 ▼

A device for keeping freshness of a vegetable comprising: means for sensing the freshness of the vegetable, said freshness sensing means sensing both component and concentration of a gas generated by the vegetable and converting sensing result into an electric signal and outputting said electric sig

A device for keeping freshness of a vegetable comprising: means for sensing the freshness of the vegetable, said freshness sensing means sensing both component and concentration of a gas generated by the vegetable and converting sensing result into an electric signal and outputting said electric signal to a microprocessor; the microprocessor receiving the electric signal from the freshness sensing means and discriminating conditions of the vegetable and outputting a control signal in accordance with vegetable condition discriminating result; and means for keeping the freshness of the vegetable, said freshness keeping means receiving the control signal from said microprocessor and controlling a predetermined factor for keeping the freshness of the vegetable.