# US 11,110,911 B2 · Measurement device, measurement system, and measurement method

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- Number: US 11,110,911 B2
- Document ID: US11110911B2
- Status: Granted
- Kind: B2
- Application number: 16/778,351
- Filed: 2020-01-31
- Published: 2020-08-06
- Granted: 2021-09-07
- Earliest claimed: 2019-02-01
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Keishi Omori
- Web page: https://patentgrep.com/patent/US11110911B2

## CPC

- B60W 20/50: Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
- E01D 22/00: Methods or apparatus for repairing or strengthening existing bridges {(electrochemical desalination or re-alkalisation C04B41/00); Methods or apparatus for dismantling bridges}
- E01D 21/00: Methods or apparatus specially adapted for erecting or assembling bridges
- B60W 2420/22: Strain gauge
- B60W 2420/905: the sensor being an xyz axis sensor
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- E01D: CONSTRUCTION OF BRIDGES, {ELEVATED ROADWAYS} OR VIADUCTS; ASSEMBLY OF BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F1/305; {tracks for special kinds of railways E01B25/00; culverts E01F5/005})

## Abstract

There is provided a measurement device including a data acquisition unit that acquires pieces of first to third data output from first to third sensors provided on a structure, an abnormality determination unit that determines whether or not each of the sensors is abnormal, a moving object detection unit that detects a moving object based on at least one of the first data and the second data, and a displacement amount calculation unit that calculates a displacement amount of the structure based on the third data, in which, when the first sensor provided on a main girder closest to an i-th lane of the structure or a main girder second closest to the i-th lane is not abnormal, the moving object detection unit detects the moving object moving on the i-th lane based on the first data output from the first sensor.

## Claims

### Claim 1

A measurement device comprising:
a data acquisition unit that acquires first data, second data, and third data, the first data being data output from a first sensor provided on a structure and representing an impact due to one of an entry of a moving object to the structure and an exit of the moving object from the structure, the second data being data output from a second sensor provided on the structure and representing an impact due to the other of the entry of the moving object to the structure and the exit of the moving object from the structure, and the third data being data output from a third sensor provided on the structure and representing a bending of the structure due to the moving object;
an abnormality determination unit that determines whether or not each of the first sensor, the second sensor, and the third sensor is abnormal;
a moving object detection unit that detects the moving object moving on the structure based on at least one of the first data and the second data; and
a displacement amount calculation unit that calculates a displacement amount of the structure based on the third data, wherein
for an integer m equal to or larger than 1 and an integer n equal to or larger than 1, the structure includes first to m-th lanes and n main girders,
for an integer k equal to or larger than 1 and equal to or smaller than n, k first sensors are respectively provided on the k main girders of the structure, and
for an integer i equal to or larger than 1 and equal to or smaller than m, when the abnormality determination unit determines that one of the first sensor provided on a main girder closest to an i-th lane of the structure and a main girder second closest to the i-th lane is not abnormal among the k first sensors, the moving object detection unit detects the moving object moving on the i-th lane based on the first data output from the first sensor that is not abnormal.

### Claim 2 (depends on 1)

The measurement device according to claim 1, wherein
for an integer p equal to or larger than 1 and equal to or smaller than n, p second sensors are respectively provided on p main girders of the structure, and
when the abnormality determination unit determines that the second sensor provided on the main girder closest to the i-th lane or the main girder second closest to the i-th lane is not abnormal among the p second sensors, the moving object detection unit detects the moving object moving on the i-th lane based on the second data output from the second sensor.

### Claim 3 (depends on 1)

The measurement device according to claim 1, wherein
the first sensor, the second sensor, and the third sensor are acceleration sensors.

### Claim 4 (depends on 1)

A measurement system comprising:
the measurement device according to claim 1;
the first sensor;
the second sensor; and
the third sensor.

### Claim 5 (depends on 1)

The measurement device according to claim 1, wherein
for an integer q equal to or larger than 1 and equal to or smaller than n, the q third sensors are respectively provided on the q main girders of the structure, and
when the abnormality determination unit determines that the third sensor provided on the main girder closest to the i-th lane or the main girder second closest to the i-th lane is not abnormal among the q third sensors, the displacement amount calculation unit calculates a displacement amount of the structure on the i-th lane based on the third data output from the third sensor and information on the moving object detected by the moving object detection unit.

### Claim 6 (depends on 5)

The measurement device according to claim 5, further comprising:
a weight calculation unit that calculates a weight of the moving object, wherein
the weight calculation unit calculates the weight of the moving object moving on the i-th lane based on the information on the moving object detected by the moving object detection unit and the displacement amount of the structure calculated by the displacement amount calculation unit.

### Claim 7

A measurement method comprising:
a data acquisition step of acquiring first data, second data, and third data, the first data being data output from a first sensor provided on a structure and representing an impact due to one of an entry of a moving object to the structure and an exit of the moving object from the structure, the second data being data output from a second sensor provided on the structure and representing an impact due to the other of the entry of the moving object to the structure and the exit of the moving object from the structure, and the third data being data output from a third sensor provided on the structure and representing a bending of the structure due to the moving object;
an abnormality determination step of determining whether or not each of the first sensor, the second sensor, and the third sensor is abnormal;
a moving object detection step of detecting the moving object moving on the structure based on at least one of the first data and the second data; and
a displacement amount calculation step of calculating a displacement amount of the structure based on the third data, wherein
for an integer m equal to or larger than 1 and an integer n equal to or larger than 1, the structure includes first to m-th lanes and n main girders,
for an integer k equal to or larger than 1 and equal to or smaller than n, the k first sensors are respectively provided on the k main girders of the structure, and
for an integer i equal to or larger than 1 and equal to or smaller than m, in the abnormality determination step, when it is determined that one of the first sensor provided on the main girder closest to an i-th lane of the structure and the main girder second closest to the i-th lane is not abnormal among the k first sensors, in the moving object detection step, the moving object moving on the i-th lane is detected based on the first data output from the first sensor that is not abnormal.