EP0122796A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Weighing apparatus
Assignee: Ishida Scales Manufacturing Co Ltd
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Filing: 1984-04-13
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Granted: —
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Expires: 2004-04-13
Abstract
Abstract A weight sensing apparatus has a weight sensor (le) provided with a load cell (4) for producing an output signal indicative of the weight of an article, and a support (3) for supporting the weight sensor. The apparatus includes oscillation sensing means (5) provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation, a summing amplifier (6) for adding the output signal from the load cell and a signal which is the inverse of the output signal from the oscillation sensing means, and signal processing means (7, 8) for processing the output of the summing amplifier to remove an oscillation component contained in the output signal from the load cell. By using an oscillation sensor (5) and summing amplifier (6), unwanted oscillation components in the load cell signal can be removed without the need for special tuning of filters and without excessive delay before a reading can be obtained.
Inventors
- 👤 Satoshi Konishi
- 👤 Kazufumi Naito
- 👤 Mitito Utsunomiya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 00:28
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/06; G01G23/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
Weighing apparatus including a support member (ld), for supporting material to be weighed, and a weight sensor (4) connected to the support member for providing a first electrical signal giving a measure of the weight of such material supported by the said support member, wherein the apparatus further includes oscillation-sensitive means (5) mounted for providing a second electrical signal giving a measure of oscillatory effects of extraneous vibrations affecting the weighing apparatus, and means (6) for combining the said second electrical signal with the said first electrical signal in such a manner as to counteract components of the first electrical signal that are due to such oscillatory effects.
Claim 2
Dependent Claim
108 words
Weighing apparatus including a support member (ld), for supporting material to be weighed, and a weight sensor (4) connected to the support member for providing a first electrical signal giving a measure of the weight of such material supported by the said support member, wherein the apparatus further includes oscillation-sensitive means (5) mounted for providing a second electrical signal giving a measure of oscillatory effects of extraneous vibrations affecting the weighing apparatus, and means (6) for combining the said second electrical signal with the said first electrical signal in such a manner as to counteract components of the first electrical signal that are due to such oscillatory effects.
Claim 3
Dependent Claim
122 words
A weight sensing apparatus having a weight sensor which includes a load cell for producing an output signal indicative of the weight of an article, and a support for supporting the weight sensor, comprising: oscillation sensing means provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation; a summing amplifier for adding the output signal from the load cell and a signal which is the inverse of the output signal from said oscillation sensing means; and signal processing means for removing an oscillation component contained in the output signal from the load cell, which oscillation component is caused by oscillation received ; by the weight sensor from the surroundings thereof.
Claim 4
Dependent Claim
122 words
A weight sensing apparatus having a weight sensor which includes a load cell for producing an output signal indicative of the weight of an article, and a support for supporting the weight sensor, comprising: oscillation sensing means provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation; a summing amplifier for adding the output signal from the load cell and a signal which is the inverse of the output signal from said oscillation sensing means; and signal processing means for removing an oscillation component contained in the output signal from the load cell, which oscillation component is caused by oscillation received ; by the weight sensor from the surroundings thereof.
Claim 5
Dependent Claim
124 words
3 . A weight sensing apparatus having a weight sensor which includes a load cell for producing an output signal indicative of the weight of an article, and a support for supporting the weight sensor, comprising: a dummy load cell provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation; an summing amplifier for adding the output signal from the load cell and a signal which is the inverse of the output signal from said dummy load cell; and signal processing means for removing an oscillation component contained in the output signal from the load cell, which oscillation component is caused by oscillation received by the weight sensor from the surroundings thereof.
Claim 6
Dependent Claim
124 words
3 . A weight sensing apparatus having a weight sensor which includes a load cell for producing an output signal indicative of the weight of an article, and a support for supporting the weight sensor, comprising: a dummy load cell provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation; an summing amplifier for adding the output signal from the load cell and a signal which is the inverse of the output signal from said dummy load cell; and signal processing means for removing an oscillation component contained in the output signal from the load cell, which oscillation component is caused by oscillation received by the weight sensor from the surroundings thereof.
Claim 7
Dependent Claim
28 words
The weight sensing apparatus according to claim 3, wherein said dummy load cell has a construction and a sensing output level identical with those of said load cell.
Claim 8
Dependent Claim
147 words
5 . A weight sensing apparatus having a weight sensor which includes a load cell for producing an output signal indicative of the weight of an article, and a support for supporting the weight sensor, comprising: oscillation sensing means provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation; a first amplifier for amplifying the output signal from said oscillation sensing means; a second amplifier for amplifying the output signal from said load cell; an summing amplifier for adding an output signal from said second amplifier and a signal which is the inverse of an output signal from said first amplifier; and signal processing means for removing an oscillation component contained in the output signal from the load cell, which oscillation component is caused by oscillation received by the weight sensor from the surroundings thereof.
Claim 9
Dependent Claim
147 words
5 . A weight sensing apparatus having a weight sensor which includes a load cell for producing an output signal indicative of the weight of an article, and a support for supporting the weight sensor, comprising: oscillation sensing means provided in the vicinity of the load cell for producing an output signal indicative of an oscillation component caused by floor oscillation; a first amplifier for amplifying the output signal from said oscillation sensing means; a second amplifier for amplifying the output signal from said load cell; an summing amplifier for adding an output signal from said second amplifier and a signal which is the inverse of an output signal from said first amplifier; and signal processing means for removing an oscillation component contained in the output signal from the load cell, which oscillation component is caused by oscillation received by the weight sensor from the surroundings thereof.
Claim 10
Dependent Claim
24 words
The weight sensing apparatus according to claim 2, 3 or 5, wherein said signal processing means comprises a low-pass filter and an analogue-to-digital converter.
References Cited (Backward Citations)
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