会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明专利
    • METHOD AND APPARATUS FOR DETECTING AT LEAST ONE PROPERTY OF MATERIAL
    • JPH11108856A
    • 1999-04-23
    • JP22617798
    • 1998-08-10
    • HAUNI MASCHINENBAU AG
    • MOELLER HENNING DRTOBIAS JOERGNOACK ANDREAS
    • A24C5/34G01N22/00G01N22/04
    • PROBLEM TO BE SOLVED: To detect properties of a material, by supplying two kinds of microwaves of high and low frequencies of modulation vibrations to a resonator, and evaluating detuning of the resonator caused by the presence of the material. SOLUTION: A microwave generator 3 supplies to a resonator 1 output signals of high and low frequencies f2, f1 of modulation vibrations (s) periodically switched by a frequency control device 24. An output signal from the resonator 1 influenced by a tobacco rod passing though the resonator 1, namely, resonant signals corresponding to high and low modulation values f2, f1 are converted into one d.c. voltage signal by a microwave diode 22 and supplied to a sampling apparatus 51. A synchronous apparatus 52 controls so that a voltage value of the resonator 1 is sampled at a time point when microwaves of the high and low frequency f2, f1 are supplied from the microwave generator 3 to the resonator 1, and obtains values Uf2 , Uf1 . An adder 56 generates a value 1/2(Uf2 +Uf1 )=Ug and a subtractor 57 generates a difference Uf2 -Uf1 =Ua from the output values. An evaluation apparatus 11 calculates values of a density, a mass, a humidity of the tobacco on the basis of the values.