Detection device, detection system, detection method, and program

• US 10,330,620 B2
• Filed: 04/07/2015
• Issued: 06/25/2019
• Est. Priority Date: 04/07/2014
• Status: Active Grant

• Current Assignee: School Juridical Person Kitasato Institute
• Original Assignee: School Juridical Person Kitasato Institute
• Inventors: Nebuya, Satoru
• Primary Examiner(s): Nguyen, Vincent Q
• Application Number:
  US15/302,247
• Publication Number:
  US 20170199143A1
• Time in Patent Office: 1,540 Days
• Field of Search: 324694, 324 711, 324715, 324717, 600327, 600345, 600587
• CPC Class Codes: A61B 2562/0209 Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
• CPC Class Codes: A61B 2562/029 Humidity sensors
• CPC Class Codes: A61B 5/02042 Determining blood loss or bleeding, e.g. during a surgical procedure
• CPC Class Codes: A61B 5/0531 Measuring skin impedance
• CPC Class Codes: A61B 5/14517 for sweat
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61F 13/42 with wetness indicator or alarm
• CPC Class Codes: A61F 2013/424 having an electronic device
• CPC Class Codes: A61M 1/14 Dialysis systems; Artificial kidneys; Blood oxygenators semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: D02G 3/441 Yarns or threads with antistatic, conductive or radiation-shielding properties electroconductive, anti-static or radiation-shielding filaments D01F1/09, D01F1/106; anti-static fabrics D03D15/533; conducting, insulating or anti-static layers for floor coverings D06N7/0042
• CPC Class Codes: D10B 2403/02431 with electronic components, e.g. sensors or switches
• CPC Class Codes: D10B 2509/00 Medical; Hygiene
• CPC Class Codes: G01N 27/06 of a liquid involving electrolysis G01N27/26
• CPC Class Codes: G01N 33/48785 Electrical and electronic details of measuring devices for physical analysis of liquid biological material not specific to a particular test method, e.g. user interface or power supply
• CPC Class Codes: G01R 23/005 Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators)

Abstract

A detection device includes: a frequency property acquisition unit that acquires a frequency property when an alternating-current signal is input to at least two conductive bodies provided on a fiber sheet; and a detection signal output unit that outputs a detection signal when the frequency property acquisition unit acquires a predetermined frequency property.

Claims

1. A detection system for detecting a specific fluid comprising:

a first conductive body;

a second conductive body;

an intermediate material adapted to absorb fluid, at least a part of the intermediate material being disposed between the first conductive body and the second conductive body;

a frequency property acquisition unit that acquires a frequency property in a case where an alternating-current signal is input to the first conductive body and the second conductive body; and

a detection signal output unit that outputs a detection signal indicative of detection of the specific fluid absorbed in the intermediate material between the first conductive body and the second conductive body, based on a difference between the frequency property acquired by the frequency property acquisition unit in a case where the alternating-current signal in a first frequency is input to the first conductive body and the second conductive body and the frequency property acquired by the frequency property acquisition unit in a case where the alternating-current signal in a second frequency different from the first frequency is input to the first conductive body and the second conductive body.

2. The detection device according to claim 1, wherein

the frequency property acquired by the frequency property acquisition unit is a phase lag of the alternating-current signal flowing between the first conductive body and the second conductive body relative to the alternating-current signal input to the first conductive body and the second conductive body.

3. The detection system according to claim 1, wherein the specific fluid to be detected is blood.

4. The detection system according to claim 1,

further comprising a fiber sheet including a thread including the first conductive body and the second conductive body which are combined such that the first and second conductive bodies do not come into contact with each other.

5. The detection system according to claim 4, wherein

the thread further includes the intermediate material being an insulation material, the first conductive body being a first electrically conductive thread, the second conductive body being a second electrically conductive thread, and

the first electrically conductive thread is covered by the insulation material and is further winded by the second conductive body.

6. The detection system according to claim 1, wherein the first and second conductive bodies are twisted together such that the first and second conductive bodies do not come into contact with each other.

7. A detection method for detecting a specific fluid, using a detection system including a first conductive body, a second conductive body and an intermediate material, the detection method comprising:

by way of the detection system, acquiring a frequency property in a case where an alternating-current signal is input to the first conductive body and the second conductive body; and

by way of the detection system, outputting a detection signal indicative of detection of the specific fluid absorbed in the intermediate material between the first conductive body and the second conductive body, based on a difference between the frequency property in a case where the alternating-current signal in a first frequency is input to the first conductive body and the second conductive body and the frequency property in a case where the alternating-current signal in a second frequency different from the first frequency is input to the first conductive body and the second conductive body.

8. A non-transitory computer-readable storage medium that stores a program that allows a computer to execute functions of a detection system including a first conductive body, a second conductive body and an intermediate material so that the computer executes the steps comprising:

acquiring a frequency property in a case where an alternating-current signal is input to the first conductive body and the second conductive body; and

outputting a detection signal indicative of detection of the specific fluid absorbed in the intermediate material between the first conductive body and the second conductive body, based on a difference between the frequency property in a case where the alternating-current signal in a first frequency is input to the first conductive body and the second conductive body and the frequency property in a case where the alternating-current signal in a second frequency different from the first frequency is input to the first conductive body and the second conductive body.

9. A detection system for detecting a specific fluid comprising:

a memory;

a first conductive body;

a second conductive body;

an intermediate material adapted to absorb fluid, at least a part of the intermediate material being disposed between the first conductive body and the second conductive body;

a frequency property acquirer that acquires a frequency property in a case where an alternating-current signal is input to the first conductive body and the second conductive body; and

a processor, in communication with the acquirer and the memory, configured to output a detection signal indicative of detection of the specific fluid absorbed in the intermediate material between the first conductive body and the second conductive body, based on a difference between the frequency property acquired by the frequency property acquirer in a case where the alternating-current signal in a first frequency is input to the first conductive body and the second conductive body and the frequency property acquired by the frequency property acquirer in a case where the alternating-current signal in a second frequency different from the first frequency is input to the first conductive body and the second conductive body.

10. A detection system for detecting a specific fluid comprising:

a memory;

a sensor fiber including a first conductive body, a second conductive body, an intermediate material adapted to absorb fluid, the intermediate material covering the first conductive body, the insulation material being winded by the second conductive body so that the sensor fiber is in the form of a thread like a coaxial cable;

a frequency property acquirer that acquires a frequency property in a case where an alternating-current signal is input to the first conductive body and the second conductive body; and

a processor, in communication with the acquirer and the memory, configured to output a detection signal indicative of detection of the specific fluid between the first conductive body and the second conductive body, based on a difference between the frequency property acquired by the frequency property acquirer in a case where the alternating-current signal in a first frequency is input to the first conductive body and the second conductive body and the frequency property acquired by the frequency property acquirer in a case where the alternating-current signal in a second frequency different from the first frequency is input to the first conductive body and the second conductive body.