# US 12,009,856 B2 · Optical communication equipment and component mounting machine

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- Number: US 12,009,856 B2
- Document ID: US12009856B2
- Status: Granted
- Kind: B2
- Application number: 17/758,835
- Filed: 2020-02-07
- Published: 2023-02-09
- Granted: 2024-06-11
- Earliest claimed: 2020-02-07
- Assignees: Fuji Corporation
- Applicants: Fuji Corporation
- Inventors: Yoshiyuki Fukaya; Hidenori Niwa
- Web page: https://patentgrep.com/patent/US12009856B2

## CPC

- H04B 10/0795: {Performance monitoring; Measurement of transmission parameters}
- H05K 13/0882: {Control systems for mounting machines or assembly lines, e.g. centralized control, remote links, programming of apparatus and processes as such (H05K13/083 takes precedence)}
- H04B 10/07955: {Monitoring or measuring power}
- H04B 10/801: {using optical interconnects, e.g. light coupled isolators, circuit board interconnections}
- H04B: TRANSMISSION
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

An optical communication equipment performs optical communication between a first apparatus and a second apparatus. The optical communication equipment includes a monitoring section configured to monitor a light amount during optical communication, and a control device configured to output predetermined information when the light amount is less than a first threshold value and shut off communication between the first and second apparatuses when the light amount is less than a second threshold value lower than the first threshold value.

## Claims

### Claim 1

An optical communication equipment for performing optical communication between a first apparatus and a second apparatus, comprising:
a monitoring section configured to monitor a light amount during the optical communication; and
a control device configured to
output predetermined information when the light amount is less than a first threshold value and shut off communication between the first and second apparatuses when the light amount is less than a second threshold value lower than the first threshold value, and
perform communication between the first and second apparatuses in a limited manner which includes checking whether there is an abnormality in at least one of the first apparatus or the second apparatus, when the light amount is less than a third threshold value lower than the first threshold value and higher than the second threshold value.

### Claim 2 (depends on 1)

The optical communication equipment according to claim 1, wherein
the control device is provided on a first apparatus side, and
the communication performed in the limited manner includes communication for checking whether the abnormality is in the second apparatus.

### Claim 3 (depends on 1)

The optical communication equipment according to claim 1, further comprising:
a first conversion unit provided on a first apparatus side to convert an electrical signal into an optical signal;
a second conversion unit provided on a second apparatus side to convert an electrical signal into an optical signal;
an optical fiber cable configured to connect the first conversion unit and the second conversion unit; and
a storage section configured to store a received light amount of an optical signal received by the first conversion unit via the optical fiber cable from the second conversion unit.

### Claim 4 (depends on 1)

The optical communication equipment according to claim 1, wherein
the first apparatus is a fixed apparatus, and
the second apparatus is a movable apparatus.

### Claim 5

A component mounting machine for mounting a component, comprising:
a mounting machine body;
a mounting head that moves with respect to the mounting machine body to mount a component; and
an optical communication equipment for performing optical communication between the mounting machine and the mounting head, including:
a monitoring section configured to monitor a light amount during the optical communication, and
a control device configured to output predetermined information when the light amount is less than a first threshold value and shut off communication between the mounting machine and the mounting head when the light amount is less than a second threshold value lower than the first threshold value, wherein
the mounting head includes a motor and an encoder configured to detect displacement of the motor, and
the mounting machine body includes a motor control section configured to drive and control the motor by receiving an encoder signal output from the encoder via the optical communication equipment and transmitting a control signal to the motor via the optical communication equipment.

### Claim 6 (depends on 5)

The component mounting machine according to claim 5, wherein
the mounting head includes an imaging device, and
the mounting machine body includes an image processing section configured to receive and process an image signal output from the imaging device via the optical communication equipment.