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Foreign object detection device and droplet discharging method

A foreign object detection, droplet technology, applied in measuring devices, devices for coating liquids on surfaces, analyzing fluids using sonic/ultrasonic/infrasonic waves, etc.

Active Publication Date: 2015-05-20
TOSHIBA TEC KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, it is difficult for this technology to detect foreign matter such as air bubbles in a small area such as a thin tube

Method used

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  • Foreign object detection device and droplet discharging method
  • Foreign object detection device and droplet discharging method
  • Foreign object detection device and droplet discharging method

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Embodiment Construction

[0026] Hereinafter, embodiments will be described with reference to the drawings. In addition, in each drawing, the same code|symbol is attached|subjected to the same structural element, and detailed description is abbreviate|omitted.

[0027] In the following, the case where the foreign object detection device is provided in the droplet discharge device and the case where the foreign object detection method is applied to the droplet discharge method are illustrated as examples. However, the object of application of the foreign object detection device and the foreign object detection method is not limited thereto, and can be widely applied to detection of foreign objects such as air bubbles contained in liquid.

[0028] figure 1 It is a schematic diagram for illustrating the foreign matter detection device and the droplet ejection device according to the first embodiment.

[0029] The driving methods of the droplet ejection device include "thermal type" and "piezoelectric ty...

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Abstract

According to one embodiment, a foreign object detection device includes a signal generator, a transmitter, a receiver, a storage section, and a detection section. A signal generator configured to generate an electrical signal. A transmitter configured to convert the electrical signal from the signal generator and to generate a pressure wave in a liquid. A receiver configured to receive a reflection wave from the liquid and to convert it to an electrical signal. A storage section configured to store information on a state of absence of a foreign object in the liquid. A detection section configured to detect at least one of presence or absence of the foreign object and size of the foreign object based on difference between the electrical signal converted from the reflection wave and an electrical signal based on the stored information.

Description

[0001] The invention is a divisional application of the following application, and the original application information is as follows: [0002] Application number: 201110409325.1 [0003] Application date: December 9, 2011 [0004] Invention name: Foreign matter detection device and method, droplet ejection device and method [0005] Citations for associated applications: [0006] This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2010-275033 filed on December 9, 2010 and Japanese Patent Application No. 2011-039540 filed on February 25, 2011, which are incorporated herein by reference all content. technical field [0007] The embodiments described here generally relate to a foreign object detection device, a foreign object detection method, a droplet discharge device, and a droplet discharge method. Background technique [0008] There are known techniques for detecting the presence of foreign matter in liquids. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/02B41J2/01G01B17/00
CPCB41J2/0451B41J2/04581B41J2/14274B41J2002/14354B41J2202/07G01N29/02G01N2291/02433G01N2291/048G01N2291/102B41J2/20B05C5/00B41J2/175
Inventor 佐藤强
Owner TOSHIBA TEC KK
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