Patent US2715905A successfully refreshed from Google Patents.
US5227716A
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US
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Measuring instrument with digital parameter control
Assignee: Fluke Corp
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Filing: 1992-02-11
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Granted: 1993-07-13
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Expires: 2012-02-11
Abstract
Abstract It is known to provide measuring instruments, such as oscilloscopes or other measuring instruments, with analog adjustment elements for adjusting various parameters, such as the horizontal and vertical position of a signal (s1, s2) to be displayed, of trigger devices, etc. A digital measuring instrument is disclosed having digital adjustment elements in which the reaction behaviour of the parameters to be set substantially corresponds to that of a measuring instrument with analog adjustment elements. For this purpose, the adjustment elements are constructed as rotatable pulse generators and the measuring instrument is provided with a pulse processing device by which the pulse duration (T, T') of the pulses generators is determined. Thus independently of the rotational speed, a parameter reaction behaviour can be set by this device which results in a natural reaction behavior similar to that of analog adjustment elements.
Inventors
- 👤 Johannes B. Olde Heuvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/02; G01P13/04; G01P13/045; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/489; G01R; G01R13/00; G01R13/20; G01R13/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
101 words
A measuring instrument for measuring quantities to be displayed, comprising: display means for displaying measured signal quantities of which at least one parameter is adjustable by adjustment means, signal processing means for receiving said quantities and for supplying the measured signal quantities to the display means, wherein the adjustment means comprise at least one adjustable rotatable pulse generator for providing pulses, and a pulse processing device coupled between the pulse generator and the display means via the signal processing means which device ascertains a pulse duration of the pulses and adjusts the parameter on the basis of the ascertained pulse duration.
Claim 2
Dependent Claim
101 words
A measuring instrument for measuring quantities to be displayed, comprising: display means for displaying measured signal quantities of which at least one parameter is adjustable by adjustment means, signal processing means for receiving said quantities and for supplying the measured signal quantities to the display means, wherein the adjustment means comprise at least one adjustable rotatable pulse generator for providing pulses, and a pulse processing device coupled between the pulse generator and the display means via the signal processing means which device ascertains a pulse duration of the pulses and adjusts the parameter on the basis of the ascertained pulse duration.
Claim 3
Dependent Claim
118 words
A measuring instrument as claimed in claim 1, wherein the pulse processing device comprises a data acquisition circuit which cyclically samples the pulses at a sampling frequency (1/Ts) which is relatively high compared with the pulse frequency (1/T, 1/T'), in that the data acquisition circuit determines the pulse duration (T, T') from the samplings and stores the pulse duration as pulse duration data when the pulse generator rotates during a pulse cycle (T, T'), or stores a stationary data when the pulse generator rotates during less than the pulse cycle and in that the pulse processing device comprises further processing means for adjusting the parameter on the basis of either the pulse duration data or the stationary data.
Claim 4
Dependent Claim
46 words
A measuring instrument as claimed in claim 2, wherein said at least one rotatable pulse generator supplies two mutually phase-shifted pulses from which the data acquisition circuit determines rotation direction data, which data the data acquisition circuit stores and passes on to the further processing means.
Claim 5
Dependent Claim
50 words
A measuring instrument as claimed in claim 3, wherein the further processing means comprise a memory with a table of control data controlled for each pulse generator by the pulse duration data, rotation direction data, and stationary data so as to control a parameter control device for controlling the parameters.
Claim 6
Dependent Claim
56 words
A measuring instrument as claimed in claim 4, wherein the parameter control device comprises a digital-to-analog converter which cyclically controls a multiplexer circuit per pulse duration data, rotation direction data, and stationary data under the control of a digital control means, and means coupling outputs of said multiplexer circuit to hold circuits which supply parameter values.
Claim 7
Dependent Claim
34 words
A measuring instrument as claimed in claim 5, characterized wherein the parameter values are adapted to the pulse duration data and the rotation direction data in one cycle or in a number of cycles.
Claim 8
Dependent Claim
34 words
A measuring instrument as claimed in claim 1 wherein the measuring instrument comprises an oscilloscope and the parameters are analog adjustment voltages for adjusting, inter alia, horizontal and vertical positions of an electron beam.
Claim 9
Dependent Claim
81 words
A pulse processing device suitable for use in a measuring instrument as claimed in claim 1, said device comprising: a data acquisition circuit which cyclically samples the pulses from the rotatable pulse generator at a sampling frequency that is high relative to the pulse frequency, said data acquisition circuit including means for determining the pulse duration and means for storing same as pulse duration data, and means controlled by said stored pulse duration data for adjusting the at least one parameter.
Claim 10
Dependent Claim
26 words
A measuring instrument as claimed in claim 1 further comprising: digital control means coupled to said signal processing means so as to control the operation thereof.
Claim 11
Dependent Claim
153 words
A measuring instrument for measuring quantities to be displayed comprising: input means for receiving electric signals representing the measured quantities to be displayed, display means for displaying the measured quantities, means coupled between the signal input means and the display means for processing electric signals received at the input means before application thereof to the display means, at least one rotatable pulse generator for providing adjustable pulses by which at least one parameter of the display means can be adjusted, a pulse processing device coupled to an output of the at least one rotatable pulse generator and to the signal processing means and operative to adjust at least one parameter related to the display of said measured quantities and as a function of the pulse duration of the pulses provided by the at least one rotatable pulse generator, and digital control means coupled to said signal processing means to control the operation thereof.
Claim 12
Dependent Claim
153 words
A measuring instrument for measuring quantities to be displayed comprising: input means for receiving electric signals representing the measured quantities to be displayed, display means for displaying the measured quantities, means coupled between the signal input means and the display means for processing electric signals received at the input means before application thereof to the display means, at least one rotatable pulse generator for providing adjustable pulses by which at least one parameter of the display means can be adjusted, a pulse processing device coupled to an output of the at least one rotatable pulse generator and to the signal processing means and operative to adjust at least one parameter related to the display of said measured quantities and as a function of the pulse duration of the pulses provided by the at least one rotatable pulse generator, and digital control means coupled to said signal processing means to control the operation thereof.
Claim 13
Dependent Claim
102 words
A measuring instrument as claimed in claim 10 wherein the pulse processing device comprises: a data acquisition circuit which cyclically samples the pulses at a sampling frequency which is high relative to the pulse frequency, means for determining from sampled pulses the pulse duration and for storing same as pulse duration data when the pulse generator rotates during a pulse cycle, or stores a stationary data when the pulse generator rotates during less than the pulse cycle, and processing means controlled by the stored pulse duration data or the stationary data for adjusting said at least one parameter as a function thereof.
Claim 14
Dependent Claim
57 words
A measuring instrument as claimed in claim 11 wherein said at least one rotatable pulse generator produces two mutually phase shifted trains of pulses, and wherein said determining means includes means for further determining from said phase shifted pulses rotation direction data and further means for storing the rotation direction data for use by said processing means.
Claim 15
Dependent Claim
75 words
A measuring instrument as claimed in claim 12 further comprising: a parameter control device having an input coupled to an output of the processing means and an output for supplying analog parameter control signals, said parameter control device comprising a digital/analog converter which cyclically controls a multiplexer circuit under control of a digital control means in the processing means and as per the stored pulse duration data, the rotation direction data and the stationary data.
Claim 16
Dependent Claim
93 words
A measuring instrument as claimed in claim 10 wherein said at least one rotatable pulse generator produces two mutually phase shifted trains of pulses, and wherein the pulse processing device comprises: a data acquisition circuit which cyclically samples the pulses at a sampling frequency which is high relative to the pulse frequency, means for determining from sampled pulses the pulse duration and the direction of rotation and for storing pulse duration data, stationary data and rotation direction data, and processing means controlled by the stored data for adjusting said at least one parameter.
Claim 17
Dependent Claim
50 words
A measuring instrument as claimed in claim 14 further comprising: a parameter control device having an input coupled to an output of the processing means to receive therefrom digital parameter values, said parameter control device further comprising a digital/analog converter for deriving analog parameter values from received digital parameter values.
References Cited (Backward Citations)
US4629981A
Cited
US4743844A
Cited
US4975689A
Cited
US5019773A
Cited
US4859935A
Cited
EP0444875A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |