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US 11,113,955 B2Granted
Data collection system
AssigneeToshiba Mitsubishi-Electric Industrial Systems Corporation
InventorNoriyuki Maehata
Life of this patent
Estimating the term…
Abstract
A data collection system includes sensors which are synchronized with each other and an optical signal distributor, wherein each of the sensors comprises a first delay unit which delays a second electrical signal for a first delay time set such that a sum of the first delay time and a first conversion time is same in all of the sensors, and the optical signal distributor comprises second delay units each of which delays a first electrical signal for a second delay time set such that all of sums of the second delay times and conversion times are same as each other.
Claims19
A data collection system comprising:
- a plurality of sensors which are synchronized with each other;
- and
- an optical signal distributor which is separate from the plurality of sensors and is connected to each of the plurality of sensors by a first optical transmission channel and a second optical transmission channel, wherein
- each of the plurality of sensors comprises:
- a physical quantity measurement unit which measures a physical quantity;
- a first optical signal transmission unit which transmits a first optical signal to the optical signal distributor via the first optical transmission channel, when the measured physical quantity satisfies a predetermined condition;
- a first signal converter which converts a second optical signal into a second electrical signal, the second optical signal being received from the optical signal distributor via the second optical transmission channel;
- a first delay unit which delays the second electrical signal obtained by the first signal converter for a first delay time, the first delay time being adjusted beforehand so that a sum of the first delay time and a first conversion time at the first signal converter is equal to a predetermined in-sensor transmission delay time, the predetermined in-sensor transmission delay time being a sum of another delay time at another delay unit and another conversion time at a corresponding another signal converter in any other sensors of the plurality of sensors and being set as a same value for all of the plurality of sensors;
- and
- a data transmission unit which transmits the physical quantity measured at a time the condition is satisfied when the physical quantity satisfies the condition, and transmits the physical quantity measured a predetermined time before a receipt time of the second electrical signal, when the data transmission unit receives the second electrical signal delayed by the first delay unit, and
- the optical signal distributor comprises:
- a plurality of pairs of a second signal converter and a second delay unit, each of the plurality of pairs corresponding to each of the plurality of sensors, each second signal converter converting the first optical signal received from a corresponding sensor among the plurality of sensors via the first optical transmission channel into a first electrical signal, respectively, each second delay unit delaying the first electrical signal output by the corresponding second signal converter paired with the second delay unit for a second delay time, the second delay time being adjusted beforehand so that a sum of the second delay time at the second delay unit and a second conversion time at the corresponding second signal converter paired with the second delay unit is equal to a predetermined in-distributor transmission delay time, the predetermined in-distributor transmission delay time being set as a same value for all pairs of the plurality of pairs of the second signal converter and the second delay unit;
- and
- a second optical signal transmission unit which transmits the second optical signal to the first signal converter of each of the plurality of sensors via the second optical transmission channel, when the second optical signal transmission unit receives the delayed first electrical signal from at least one of the second delay units.
11 more elements
A data collection method using a plurality of sensors which are synchronized with each other and an optical signal distributor, which is separate from the plurality of sensors and is connected to each of the plurality of sensors by a first optical transmission channel and a second optical transmission channel, wherein
- each of the plurality of sensors is configured to:
- measure a physical quantity;
- transmit a first optical signal to the optical signal distributor via the first optical transmission channel, when the measured physical quantity satisfies a predetermined condition;
- convert a second optical signal into a second electrical signal into a second electrical signal, the second electrical signal being received from the optical signal distributor into a second electrical signal via the second optical transmission channel;
- delay the obtained second electrical signal for a first delay time, the first delay time being adjusted beforehand so that a sum of the first delay time and a conversion time for conversion into the second electrical signal is equal to a predetermined in-sensor transmission delay time, the predetermined in-sensor transmission delay time being a sum of another delay time and another conversion time corresponding to the other delay time in any other sensors of the plurality of sensors and being set as a same value for all of the plurality of sensors;
- and
- transmit the physical quantity measured at a time the condition is satisfied when the physical quantity satisfies the condition, and transmit the physical quantity measured a predetermined time before a receipt time of the second electrical signal, when the delayed second electrical signal is received, and
- the optical signal distributor is configured to:
- convert the first optical signal received from each of the plurality of sensors via the first optical transmission channel into a first electrical signal;
- delay the output first electrical signal for a second delay time, the second delay time being adjusted beforehand so that a sum of the second delay time and a second conversion time for conversion into the first electrical signal is equal to a predetermined in-distributor transmission delay time, the predetermined in-distributor transmission delay time being set as a same value for all of pairs of the second conversion time and the second delay time, corresponding to the first optical signal output from each of the plurality of sensors;
- and
- transmit the second optical signal to each of the plurality of sensors via the second optical transmission channel, when the at least one delayed first electrical signal is received.
9 more elements
A data collection system comprising:
- a plurality of sensors which are synchronized with each other, each of the plurality of sensors comprising a first circuitry;
- and
- an optical signal distributor, which is separate from the plurality of sensors and is connected to each of the plurality of sensors by a first optical transmission channel and a second optical transmission channel, comprising a second circuitry,
- wherein, the first circuitry is configured to
- measure a physical quantity,
- transmits a first optical signal to the optical signal distributor via the first optical transmission channel, when the measured physical quantity satisfies a predetermined condition,
- convert a second optical signal into a second electrical signal, the second optical signal being received from the optical signal distributor via the second optical transmission channel,
- delay the second electrical signal for a first delay time, the first delay time being adjusted beforehand so that a sum of the first delay time and a first conversion time required to convert the second optical signal into the second electrical signal is equal to a predetermined in-sensor transmission delay time, the predetermined in-sensor transmission delay time being a sum of another delay time and another conversion time in any other sensors of the plurality of sensors and being set as a same value for all of the plurality of sensors,
- transmit the physical quantity measured at a time the condition is satisfied when the physical quantity satisfies the condition, and transmit the physical quantity measured a predetermined time before a receipt time of the second electrical signal, when receiving the second electrical signal delayed for the first delay time, and
- wherein the second circuitry is configured to
- perform a plurality of pairs of a second signal conversion process and a second delay process, each of the pairs corresponding to each of the plurality of sensors, each second signal conversion process converting the first optical signal received from a corresponding sensor among the plurality of sensors via the first optical transmission channel into a first electrical signal, respectively, each second delay process delaying the first electrical signal output at the second signal conversion process paired with the second delay process for a second delay time, the second delay time being adjusted beforehand so that a sum of the second delay time and a second conversion time at the second conversion process is equal to a predetermined in-distributor transmission delay time, the predetermined in-distributor transmission delay time being set as a same value for all of the plurality of pairs of the second conversion process and the second delay process, and
- transmit the second optical signal to each of the plurality of sensors via the second optical transmission channel, when the second circuitry receives the delayed first electrical signal delayed for the second delay time.
9 more elements
Dependencies are inferred from the claim text.