# US 2021/0243310 A1 · Detection device and processing device

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- Number: US 2021/0243310 A1
- Document ID: US20210243310A1
- Status: Published application
- Kind: A1
- Application number: 17/161,821
- Filed: 2021-01-29
- Published: 2021-08-05
- Earliest claimed: 2020-01-31
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Tsuneyuki SASAKI
- Web page: https://patentgrep.com/patent/US20210243310A1

## CPC

- H04N 1/00034: {Measuring, i.e. determining a quantity by comparison with a standard (H04N1/00031 takes precedence)}
- B41J 2/01: Ink jet
- B41J 11/009: {Detecting type of paper, e.g. by automatic reading of a code that is printed on a paper package or on a paper roll or by sensing the grade of translucency of the paper}
- G01N 29/043: {in the interior, e.g. by shear waves}
- G01N 29/27: by moving the material relative to a stationary sensor
- G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing}
- H04N 1/00: Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- B41J 2203/01: Inspecting a printed medium or a medium to be printed using a sensing device
- G01N 27/223: {for determining moisture content, e.g. humidity (rain detectors on vehicle windows B60S1/0825)}
- G01N 2291/0237: Thin materials, e.g. paper, membranes, thin films
- G01N 2291/02845: Humidity, wetness
- G01N 2291/102: one emitter, one receiver
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING

## Abstract

A detection device includes an electrostatic capacitance sensor including an electrode pair and being configured to detect electrostatic capacitance of a medium brought into contact with the electrode pair, and a first ultrasonic wave sensor including a first transmission unit configured to transmit an ultrasonic wave and a first reception unit configured to receive an ultrasonic wave transmitted from the first transmission unit. The transmission unit and the reception unit are positioned to sandwich the medium.

## Claims

### Claim 1

A detection device, comprising:
an electrostatic capacitance sensor including an electrode pair and being configured to detect electrostatic capacitance of a medium in contact with the electrode pair; and
an ultrasonic wave sensor including a transmission unit configured to transmit an ultrasonic wave and a reception unit configured to receive an ultrasonic wave transmitted from the transmission unit, wherein
the transmission unit and the reception unit are positioned to sandwich the medium.

### Claim 2 (depends on 1)

The detection device according to claim 1, wherein the detection device is configured to detect an amount of moisture contained in the medium supported by a support unit,
the reception unit is a first reception unit, and
the detection device includes a second reception unit configured to receive an ultrasonic wave that is reflected by the medium supported by the support unit and an ultrasonic wave that is reflected by the support unit.

### Claim 3 (depends on 1)

The detection device according to claim 1, wherein the detection device is configured to detect an amount of moisture contained in the medium supported by a support unit,
the electrostatic capacitance sensor is attached to the support unit, and includes a position adjustment unit configured to adjust a position of the electrode pair with respect to the support unit.

### Claim 4 (depends on 3)

The detection device according to claim 3, wherein
the electrode pair includes two electrodes, and
the position adjustment unit adjusts a position of the electrode pair in a state in which a distance between the two electrodes is maintained.

### Claim 5

A processing device, comprising:
a first electrostatic capacitance sensor including a first electrode pair and being configured to detect electrostatic capacitance of a medium in contact with the first electrode pair;
a second electrostatic capacitance sensor including a second electrode pair and being configured to detect electrostatic capacitance of the medium in contact with the second electrode pair;
an ultrasonic wave sensor including a transmission unit configured to transmit an ultrasonic wave and a reception unit configured to receive an ultrasonic wave transmitted from the transmission unit;
a support unit configured to support the medium to be transported; and
a processing unit facing the support unit and being configured to perform processing of increasing or decreasing an amount of moisture contained in the medium, wherein
the transmission unit and the reception unit are positioned to sandwich the medium to be transported,
the first electrode pair contacts the medium before being subjected to processing by the processing unit, and
the second electrode pair contacts the medium after being subjected to processing by the processing unit.

### Claim 6 (depends on 5)

The processing device according to claim 5, wherein
the processing unit is configured to perform processing on a front surface of the medium, the front surface being opposite to a back surface contacting the support unit, and
the first electrode pair and the second electrode pair contact the back surface.