Seating detection sensor, sedentariness prompting device and intelligent seat

A technology for detecting sensors and reminding devices, which is applied in the field of sedentary reminding devices, smart seats, and seating detection sensors, can solve the problems of unfavorable sensor cost, low accuracy, and inability to be placed in seats, etc., and achieves low implementation cost and satisfactory The effect of comfort requirements

Pending Publication Date: 2016-04-06
肖语清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device can only detect the sitting posture in the plane, and the reminder function must be performed through a smart mobile device
Patent No. 201410775635.9 "Adjustable Human Body Posture Detection and Reminder Device", the detection sensor is a three-axis acceleration sensor, which judges whether the wearer is seated by the acceleration value in the vertical direction, and sends out a vibration reminder over time to avoid sedentary sitting, but the device cannot directly detect The sitting posture of the human body can only be calculated through motion data, the accuracy is not high, there is only a vibration reminder function, and the device cannot be placed in the seat
[0004] All kinds of sedentary reminding devices that have been announced have adopted a variety of sensors. These sensors include pyroelectric infrared sensors, pressure sensors, pressure switches, and acceleration sensors. Among them, pyroelectric infrared sensors are prone to false alarms, and pressure sensors and pressure switches There is a fatigue life limit, and the three-axis acceleration sensor needs to be calculated from motion data
These sensors have a fixed shape and a certain volume, and are made of hard materials, which cannot be seamlessly integrated with the seat, which will inevitably affect the comfort of the seat
Various sensors are dedicated devices, which is not conducive to reducing the cost of the sensor, and cannot accurately detect the sitting posture including the back
The reminder function of various sedentary reminder devices is single and cannot be turned off, which is not conducive to prolonging the power supply time of the battery

Method used

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  • Seating detection sensor, sedentariness prompting device and intelligent seat
  • Seating detection sensor, sedentariness prompting device and intelligent seat
  • Seating detection sensor, sedentariness prompting device and intelligent seat

Examples

Experimental program
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Effect test

Embodiment 1

[0033]The seating detection sensor 3 of the present embodiment is made up of detection electrode 1 and signal processing module 2, is installed on the cushion, see figure 1 . In this example, the measurement object of the signal processing module 2 is self-capacitance, and only one electrode is needed to measure self-capacitance. For self-capacitance, no matter whether the human body is close or not, there is a relatively fixed distributed capacitance between the electrode and the circuit parts connected to the electrode and the ground, which is called static capacitance, and its size remains unchanged. When the human body is close enough to the electrode, the electrode and the human body will form a simple parallel plate capacitance, called body capacitance. Since the static capacitance and the human body capacitance can both be regarded as the capacitance between the electrode and the ground, the two are connected in parallel, and the self-capacitance is equal to the sum of...

Embodiment 2

[0041] The seat detection sensor 3 of this embodiment is composed of a detection electrode 1 and a signal processing module 2, wherein the signal processing module 2 does not use a dedicated touch sensing control chip, but is completed by conventional MCU software and hardware, and the measurement object is self-capacitance.

[0042] Application method see figure 2 , is to charge and discharge the self-capacitance through the I / O port of the MCU, and at the same time combine the I / O port interrupt and timer to detect the size change of the self-capacitance and detect the approach of the human body. In this method, the detection electrode 1 is an inline electrode 1a made of copper foil with a thickness of 0.065 mm, the length is less than 200 mm, and the width is less than 10 mm. The signal processing module 2 is a conventional MCU, and the leakage current of the MCU pin is required to be very small, not more than 50nA, otherwise it will affect the measurement of the capacitor...

Embodiment 3

[0045] The seating detection sensor 3 of the present embodiment is made up of detection electrode 1 and signal processing module 2, see Figure 4 , the measurement object of the signal processing module 3 is mutual capacitance, and a pair of electrodes is required to measure mutual capacitance. For mutual capacitance, the size of the capacitance is only related to the distance between two electrodes and the area of ​​the two electrodes, and the size is fixed. The signal processing module 3 applies an excitation signal of several hundred kHz sine waves on one electrode. Due to the existence of mutual capacitance, the signal can be sensed on the other electrode through the electric field effect of the capacitance. The magnitude of the induced signal is the same as that of the excitation signal. The frequency is related to the size of the mutual capacitance. When the excitation signal is determined, the induction signal is only related to the mutual capacitance. When the human b...

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Abstract

The invention relates to a timing prompting device and especially relates to a seating detection sensor, a sedentariness prompting device and an intelligent seat. The seating detection sensor is composed of detection electrodes and a signal processing module and adopts a capacitance touch induction principle to detect the approaching of a human body. The intelligent seat is provided with the sedentariness prompting device internally provided with the seating detection sensor, seating information and position information of a user are accurately detected, dynamic adjustment is accordingly carried out on time delay based on a preset time threshold, and alarm information is emitted in time to prompt the user to stand up for a rest. The seating detection sensor, the sedentariness prompting device and the intelligent seat have the advantages that: the electrodes are selected according to the type of the seat, seamless fusion between the detection electrodes and the seat is realized, the comfort requirement of the user is met to the largest extent, the implementation cost is relatively low, and the limit of a fatigue lifetime does not exist; in addition, the user can select whether to user a prompting unit of the device itself or to use a prompting unit of an intelligent mobile device in an expanding manner, and sitting posture information and alarm information are visually displayed through a picture and text interface.

Description

technical field [0001] The invention relates to a timing reminding device, in particular to a seating detection sensor, a sedentary reminding device and an intelligent seat. Background technique [0002] Sitting for a long time is extremely harmful and is one of the top ten disease killers. The popularization of medical knowledge has also made most people aware of the dangers of sitting for a long time, but for white-collar workers and young students, due to work pressure and study tension, they often forget or cannot exercise regularly, and after sitting for a long time, due to physical fatigue , It is very easy to cause improper sitting posture. Such a vicious circle has caused great harm to the body. [0003] Some sedentary reminder devices and sensors for their applications have been published. For example, patent No. 201320317777.1 "a seat cushion with timing reminder", the detection sensor is a pyroelectric infrared sensor and a pressure switch. , and then remind se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B21/24
CPCG08B21/24
Inventor 肖语清
Owner 肖语清
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