Method to check the consummation of sampling by concave liquid level

Patent metadata

Field	Value
Publication number	US-10921339-B2
Application number	US-201916397450-A
Country	US
Kind code	B2
Filing date	Apr 29, 2019
Priority date	Apr 27, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A detection system may include a reaction cell which is a container for reacting the detection sample, a light source configured to emit a detection light toward an inside of the reaction cell from one side of the reaction cell, and a photoelectric sensor arranged on the other side of the reaction cell so as to face the light source and configured to receive the detection light transmitted through the reaction cell and convert a signal of the received detection light into an electrical signal. A judging method may include judging whether or not the detection sample has been supplied based on whether or not the electrical signal output from the photoelectric sensor changes by sending an instruction to supply the detection sample to the reaction cell to the detection system in a state in which the light source and the photoelectric sensor are kept being operated. When the liquid level of the detection sample reaches an optical path of the detection light and an amount of change of the electrical signal output from the photoelectric sensor exceeds a specified threshold, it may be judged that the detection sample has been supplied. According to embodiments of the present invention, it is possible to easily, assuredly and quickly judge whether or not the detection sample has been supplied by existing devices in a detection system.

First claim

The invention claimed is:

1. A method for judging whether or not a detection sample has been supplied in a detection system,
the detection system including:
a reaction cell including a container in which the detection sample is reacted,
a light source configured to emit a detection light toward an inside of the reaction cell from one side of the reaction cell, and
a photoelectric sensor arranged on the other side of the reaction cell to face the light source and configured to receive the detection light transmitted through the reaction cell and convert the received detection light into an electrical signal,
the method comprising a step of judging whether or not the detection sample has been supplied, based on a variation in the electrical signal output from the photoelectric sensor when an instruction to supply the detection sample to the reaction cell is transmitted to the detection system in a state in which the light source and the photoelectric sensor are being operated, and
wherein the step of judging includes judging that the detection sample has been supplied when the liquid level of the detection sample reaches an optical path of the detection light, causing an amount of change of the electrical signal output from the photoelectric sensor to exceed a specified threshold.

2. The method as recited in claim 1 ,
wherein the detection system is configured to judge that the detection sample has not been supplied in cases where the electrical signal output from the photoelectric sensor shows no change or the amount of change of the electrical signal does not exceed the specified threshold after a specified time has elapsed.

3. The method as recited in claim 1 ,
wherein the step of judging includes judging that the detection sample has been supplied in response to the highest point of the liquid level of the detection sample reaching an optical path of the detection light to cause the amount of change of the electrical signal output from the photoelectric sensor to exceed the specified threshold.

4. The method as recited in claim 1 ,
wherein the method further includes a washing step of washing passage pipes and the reaction cell in the detection system using the detection sample before detecting the detection sample, and
wherein the step of judging is performed when the washing step is performed.

5. The method as recited in claim 1 ,
wherein when the detection system performs online real-time detection, the detection sample is an online sample sampled in real-time via a sampling system, and
wherein the step of judging further includes, in response to judging that the online sample has not been supplied, judging that a malfunction has occurred in the sampling.

Assignees

• Shimadzu Corp

Inventors

• Gu Ting
• Huang Hongyi
• Xu Chao

Classifications

• G01F23/2921

  for discrete levels · CPC title

• G01N2035/1025

  Fluid level sensing · CPC title

• G01N35/1009 Primary

  Characterised by arrangements for controlling the aspiration or dispense of liquids · CPC title

• G01V8/12

  using one transmitter and one receiver · CPC title

• G01N2001/002

  Devices for supplying or distributing samples to an analysing apparatus · CPC title