Claims
- 1. A level measuring device operating with microwave bursts, for producing a level value representative of a level in a vessel, said level measuring device comprising:a transceiver unit for generating a level-dependent intermediate-frequency signal by means of a transmit signal and a receive signal; a transducer element which in operation couples transmitted waves, particularly pulsed waves, into the vessel under control of the transmit signal and which converts echo waves reflected from the contents of the vessel into the receive signal; and a control unit with a volatile data memory for storing, at least temporarily, a finite sampling sequence currently representing the intermediate-frequency signal, wherein: the volatile data memory holds, at least temporarily, a digital envelope which represents a temporal amplitude variation of the intermediate-frequency signal; and the volatile data memory holds, at least temporarily, a data record which corresponds to a phase of a data record of the sampling sequence and represents a result of a numerical division of said data record by an essentially equal-locus data record of the envelope.
- 2. A level measuring device operating with microwave bursts, for producing a level value representative of a level in a vessel, said level measuring device comprising:a transceiver unit for generating a level-dependent intermediate-frequency signal by means of a transmit signal and a receive signal; a transducer element which in operation couples transmitted waves, particularly pulsed waves, into the vessel under control of the transmit signal and which converts echo waves reflected from the contents of the vessel into the receive signal; and a control unit with a volatile data memory for storing, at least temporarily, a finite sampling sequence currently representing the intermediate-frequency signal, wherein: the volatile data memory holds, at least temporarily, a first quadrature-signal sequence, which represents a numerically performed downconversion of at least a portion of the first signal sequence; and the volatile data memory holds, at least temporarily, a data record which corresponds to a phase of a data record of the sampling sequence and represents a numerical division of a data record of the first quadrature-signal sequence by an essentially equal-locus data record of the second quadrature-signal sequence.
- 3. A level measuring device operating with microwaves for producing a level value representative of a level in a vessel, said level measuring device comprising:a transceiver unit for generating a level-dependent intermediate-frequency signal by means of a transmit signal and a receive signal; a transducer element coupling pulsed microwaves into the vessel under control of the transmit signal, and converting echo waves reflected from the contents of the vessel into the receive signal; and a control unit with a volatile data memory for storing, at least temporarily, a finite sampling sequence currently representing the intermediate-frequency signal, wherein: the volatile data memory holds, at least temporarily, a digital envelope representing a temporal amplitude variation of the intermediate-frequency signal; and the volatile data memory holds, at least temporarily, a data record which corresponds to a phase of a data record of the sampling sequence and represents a result of a numerical division of said data record by an essentially equal-locus data record of the digital envelope.
- 4. A level measuring device operating with microwaves for producing a level value representative of a level in a vessel, said level measuring device comprising:a transceiver unit for generating a level-dependent intermediate-frequency signal by means of a transmit signal and a receive signal; a transducer element coupling pulsed microwaves into the vessel under control of the transmit signal, and converting echo waves reflected from the contents of the vessel into the receive signal; and a control unit with a volatile data memory for storing, at least temporarily, a finite sampling sequence currently representing the intermediate-frequency signal, wherein: the volatile data memory holds, at least temporarily, a first signal sequence representing a numerically performed multiplication of the sampling sequence by a digital sine-wave signal sequence; the volatile data memory holds, at least temporarily, a second signal sequence representing a numerically performed multiplication of the sampling sequence by a digital cosine-wave signal sequence; the volatile data memory holds, at least temporarily, a second quadrature-signal sequence, which represents a numerically performed downconversion of at least a portion of the second signal sequence; and the volatile data memory holds, at least temporarily, a data record which corresponds to a phase of a data record of the sampling sequence and represents a numerical division of a data record of the first quadrature-signal sequence by an essentially equal-locus data record of the second quadrature-signal sequence.
- 5. A level measuring device operating with microwaves for producing a level value representative in a vessel, said level measuring device comprising:a transceiver unit for generating a level-dependent intermediate-frequency signal by means of a transmit signal and a receive signal; a transducer element coupling pulsed microwaves into the vessel under control of the transmit signal, and converting echo waves reflected from the contents of the vessel into the receive signal; and a control unit with a volatile data memory for storing, at least temporarily, a finite sampling sequence currently representing the intermediate-frequency signal, wherein: the volatile data memory holds, at least temporarily, first signal sequence representing a numerically performed multiplication of the sampling sequence by a digital sine-wave signal sequence; the volatile data memory holds, at least temporarily, a first quadrature-signal sequence, which represents a numerically performed downconversion of at least a portion of the first signal sequence; and the volatile data memory holds, at least temporarily, a first average-value sequence, which serves in particular to generate the first quadrature-signal sequence and which represents a variation of a time average of at least a portion of the first signal sequence.
Priority Claims (1)
Number |
Date |
Country |
Kind |
01103402 |
Feb 2001 |
EP |
|
Parent Case Info
This application relies for priority on a prior filed provisional application, filed Feb. 16, 2001, and assigned Appln. No. 60/268,861.
US Referenced Citations (14)
Foreign Referenced Citations (5)
Number |
Date |
Country |
19501379 |
Aug 1995 |
DE |
4407369 |
Sep 1995 |
DE |
0955527 |
Nov 1999 |
EP |
1069438 |
Jan 2001 |
EP |
WO 0073747 |
Dec 2000 |
WO |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/268861 |
Feb 2001 |
US |