CN106618872A - Method for wireless detection of liquid leakage - Google Patents

Abstract

The invention designs an automatic wireless liquid detection system for a paper diaper. The detection system has the following three features: (1) a soft passive open coil is arranged on the surface of the diaper or in the diaper, and the open coil can be kept under two states: (a) the coil is under an open state in a dry environment, and (b) under the circumstance that the diaper is wet by liquid (such as urine), the loop (the coil) is under a closed state on the basis of electrical conductivity of the liquid; and (2) an active timing radio frequency transmitter and a signal detector are arranged nearby the coil, wherein the transmitter is used for transmitting electromagnetic excitation waves, and the transmitter is used for generating Faraday electromagnetic induction when the coil is kept under the closed state; and the signal detector is used for detecting a Faraday electromagnetic induction signal. The method can be used for detecting whether the paper diaper is wet by the liquid by detecting state signals of the loop. The automatic detection method can replace a manual operation in detecting the paper diaper; and the automatic detection method is higher in practicability.

Description

A kind of method of radio detection liquid leakage

Technical field

The invention belongs to medical treatment ＆ health monitor system, and in particular to a kind of radio detection dress of automatic detection liquid leakage Put.

Background technology

One of existing liquid tight sealed engagement mode is the use of paper diaper.Paper diaper are used for capture and quickly absorb urine, divide Scattered urine, it is diffused into it in whole sandwich layer by capillarity, finally absorbs and storage of urine.The product work(of market sale Absorbent core layer can be relied primarily on, the layer structure that it is mainly made up of pure wood pulp (Time of Fluff Slurry) and high hydroscopic resin (SAP).Baby What youngster or the elderly tried it on be in order in the case of unconscious urine is wet, the wet moistening for causing of urine be reduced to greatest extent, with Keep skin dry and comfortable.

But, when urine soaks most paper diaper, user should Jing change paper diaper in time.That is, During routine use paper diaper, need running check and change urine pants, otherwise easily produce the diseases such as diaper rash.Conventional method is logical Cross the method detection that eye-observation and hand are touched.

A kind of simple portable automatic detector of present invention design, comprising the wireless detection device for automatically generating electric signal.

The content of the invention

The purpose of the present invention is to realize whether automatic detection paper diaper are in the dampness of liquid infiltration, once be dried Paper diaper are infiltrated by liquid, and detection means is instantly obtained detection signal.The present invention can replace manual detection, and its advantage is detection With real-time.

Technical solutions according to the invention are as follows.

First, a kind of preposition coil, its feature includes：

1) preposition coil is made up of enamel-covered wire, and coil is in open-circuit condition, and its two poles of the earth connects respectively two sheet metals, and locates In released state.

2) chip (option) can also be set in preposition coil.

3) when using, preposition coil is attached to paper diaper surface or is embedded.

Described preposition coil the two poles of the earth turn in the case of Hquid, form closed-loop path.Meanwhile, swashing in outer electromagnetic wave Encourage down, this closed-loop path produces into faraday electromagnetic induction.

2nd, radio source excitation transmitter, its feature includes：

1) the exomonental simple harmonic quantity radio magnetic wave of radio source excitation transmitter timing.

2) radio source transmission power setting principle is, to reach the purpose that can encourage preposition coil.

3rd, signal detector, its feature includes：

1) signal detector detects faraday electromagnetic induction/chip signal for detecting closed loop signal, that is,.

Paper diaper detection originates in radio source excitation transmitter electromagnetic radiation：When transmitter electromagnetic radiation is encouraged, such as Under drying regime, in open circuit, it is that power supply encourages the direct of transmitter that signal detector receives signal to coil to fruit paper diaper Transmitting is revealed；When paper diaper are in wet face state, coil is in closure state, and signal detector detects faraday electromagnetic induction The data signal of signal/chip.This process completes paper diaper state-detection, and is receiver letter by state paper diaper condition conversion Electric signal.

Description of the drawings

Fig. 1 is signal coil design drawing

Fig. 2 is aid transmitter, receiver design and signal detecting method figure

Applicating example

The signal transmission interval of signal projector is designed as into 1 minute once, when coil closure is detected, signal will be stored In chip.

Claims (3)

1. a kind of for infiltrating the radio detection equipment switched as closing of circuit using liquid, its feature includes：

1) for the purpose of response external excitation of electromagnetic wave, with liquid leaching connection coil two-stage, and the liquid of closed-loop path is formed Infiltration or liquid leakage detector line circle.

2) using faraday electromagnetic induction as the infiltration of signal liquid or the detection method of liquid leakage.

2. a kind of timed irradiation driving source, its feature includes：

1) to provide claim 1 in electromagnetic excitation source, whether detection coil be in closure state.

2) field wave transmission time interval is set, to arrange detection time interval.

3. a kind of signal receiving device, its feature includes：

In as described in claim 1 and 2, the device of closed-loop path farad electromagnetic induction signal is received.