发明名称 |
Humidity measuring device and a heat cooker employing the device |
摘要 |
The present invention relates to a highly reliable, accurate humidity measuring device which detects differences in humidity between datum air and measuring air as a time or a phase difference in the propagation velocity of ultrasonic waves, using ultrasonic wave generating and receiving means, and processes this difference using circuitry. |
申请公布号 |
US5387254(A) |
申请公布日期 |
1995.02.07 |
申请号 |
US19930027076 |
申请日期 |
1993.03.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MATSUSHIMA, HARUO |
分类号 |
A21B3/04;G01N29/024;(IPC1-7):G01N29/02 |
主分类号 |
A21B3/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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