WO2007051352A1

WO2007051352A1 - A fatigue early warning system and a implementation method thereof

Info

Publication number: WO2007051352A1
Application number: PCT/CN2005/001840
Authority: WO
Inventors: Xi Liu; Xiaohua Guo
Original assignee: Xi Liu; Xiaohua Guo
Priority date: 2005-11-04
Filing date: 2005-11-04
Publication date: 2007-05-10

Abstract

A fatigue early warning system, which includes a fatigue signal detection unit, a signal processing unit and a fatigue alarm unit. The fatigue signal detection unit includes a alloy electrode sensor and a photoelectric sensor; the signal processing unit includes a analog signal processing circuit, which converts the fatigue signal into analog voltage signal, a A/D conversion circuit, which converts the analog voltage signal into digital signal, and a microprocessor which processes the digital signal; the fatigue alarm unit includes a sound notice circuit, a vibrating circuit and a impulse circuit and so on. The present invention is not only lower cost product, but also can accurately distinguish the change of spirit of user during the whole day. The system is suited to miniaturization, and can be integrated into adornments such as chaplet, finger ring, earbob and the like, and can be imbedded into various accutrons, or case of MP3, helmet, steering wheel and so forth, so the system can be extensively applied to the fields of military, traffic, commodity and otherwise, to actively perform fatigue early warning for safety.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an early warning system, and more particularly to a fatigue early warning system using a biological signal for fatigue warning and an implementation method thereof. Background technique

In modern society, the pace of work and life is accelerating. In order to adapt to this rhythm, people's spirit and body will often be in a state of tension, which will inevitably lead to fatigue. The change of the physical state of the human body throughout the day is related to the efficiency and quality of the human body's work and life. Nowadays, the mental state of people's physical fitness is based on the perception of individual subjective consciousness, and it is not possible to accurately quantify the physical state of the human body. Therefore, a special instrument is needed to detect the fatigue state of the human body by detecting the biological signal of the human body, to judge the change of the mental state of the human body, and to prevent and reduce the possibility and probability of accidents caused by fatigue driving and work. At present, similar fatigue early warning devices mainly use (1) American CCED eyelid tracking system, but the system is complicated and costly; (2) Japanese voice judgment method, whether the voice of the person's speech is changed to judge whether the person is tired or not, but because of the sound Individual differences, the method is not reliable, and the credibility is not high; (3) The human bioelectrical detection method uses the bioelectrical impedance analysis method (BIA method), the system is relatively complicated, which is not conducive to miniaturization, and the collecting electrode must be It is placed on the palm of your hand, so it is inconvenient to use. SUMMARY OF THE INVENTION An object of the present invention is to provide a fatigue early warning system to solve the problems of complicated circuit, large volume, and inconvenient use in the existing fatigue early warning system. In order to achieve the above object, the fatigue warning system provided by the present invention comprises a fatigue signal detecting device, a signal processing device and a fatigue warning device, the fatigue signal detecting device comprises an alloy electrode sensor for extracting a fatigue signal; and the signal processing device comprises converting the fatigue signal into An analog signal processing circuit for analog voltage signals, an A/D conversion circuit for converting the analog voltage signal into a digital signal, and a microprocessor for processing the digital signal; the fatigue warning device includes a display, a voice prompt circuit, and a vibration At least one of a circuit and a pulse circuit. The negative electrode of the alloy electrode sensor in the fatigue signal detecting device is made of an aluminum alloy or a material containing an aluminum alloy, and the positive electrode is another metal material. A photosensor is also included in the fatigue signal detecting device. The analog signal processing circuit includes an amplifying circuit and a filtering shaping circuit. The microprocessor includes a CPU, an input and output circuit, a ROM, a RAM, an oscillating circuit, and a reset circuit. The method for implementing the fatigue warning system for the user by using the fatigue warning system includes the following steps: a Turning on and connecting the sensor; b detecting whether there is signal input, and if so, measuring the human mental state value; d determining the human mental state value If it is within the normal range, if yes, execute step b, otherwise the e voice prompts "Are you okay now?"; f Determine whether there is a button answer or voice response, if yes, go to step c, otherwise g will make a three-way voice prompt "You Is it okay? ";h) Determine if there is a button answer or voice response, and if so, perform step c, otherwise i output a pulse or vibration signal. Step b further includes the steps of: bl If there is no signal input, the voice prompts "Please connect the sensor"; b2 determines whether there is a signal input within 30 seconds, if yes, execute step c, otherwise Step d further includes the steps of: determining whether the current mental state value and the previous mental state value have changed, if yes, executing step e, otherwise performing step b. The fatigue state detecting device of the present invention includes an alloy electrode sensor that extracts a fatigue signal and a photosensor that detects a change in heart rate of the microcirculation. The negative electrode of the alloy electrode sensor is made of aluminum alloy or a material containing aluminum alloy, and the positive electrode is made of other metal materials. The invention adopts the above technical solution, in particular, the alloy electrode sensor is used to collect the human body fatigue signal, so that compared with the existing fatigue monitoring technology, the change of the physical state of the human body in one day can be accurately determined, and the circuit is simple and low in cost. Conducive to integration, miniaturization, industrialization. The system of the invention can be integrated into the collar, the ring, the earloop and the like, and can be assembled in the same casing with various wrist electronic watches or MP3s, and can be well integrated with the steering wheel of the vehicle, the ship, the airplane and the like. Become an active security system suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS Specific embodiments of the invention are described in detail below with reference to the drawings. 1 is a schematic structural view of a fatigue early warning system of the present invention; FIG. 2 is a schematic structural view of a fatigue signal detecting device of the fatigue early warning system of the present invention; and FIG. 3 is a flow chart of operation of the fatigue early warning system of the present invention. 1 is a schematic diagram of a circuit structure of a fatigue early warning system of the present invention. As shown in FIG. 1, the fatigue warning system of the present invention includes a fatigue signal detecting device, a signal processing device, and a fatigue warning device. The fatigue signal detecting device comprises an alloy electrode sensor for extracting a fatigue signal for collecting a human body fatigue signal; the signal processing device comprises an analog signal processing circuit for converting the fatigue signal into an analog voltage signal and an A/D for converting the analog voltage signal into a digital signal. And a conversion circuit, and a microprocessor for processing the digital signal, the microprocessor comprising a CPU, an input and output circuit, a ROM, a RAM, an oscillating circuit and a reset circuit. Fatigue warning device The display includes a display, a voice prompt circuit, a vibration circuit, a pulse circuit, and the like. 2 is a schematic structural view of a fatigue signal detecting device of the fatigue early warning system of the present invention. As shown in FIG. 2, the fatigue signal detecting device is composed of an alloy electrode sensor and a photoelectric sensor, wherein the negative electrode in the alloy electrode must use an aluminum alloy or an electrode containing an aluminum alloy component, and the positive electrode is another metal material. The two sensors above 4 bar are installed on the back cover of the watch, or on the steering wheel of the car, etc., which can be in good contact with human skin. The unique "battery effect" generated by the contact of the aluminum alloy electrode sensor with human skin, that is, the skin potential, This voltage changes with the change of the human mental state; after the contact with the human skin by the photoelectric sensor, the change of the human microcirculation is detected, and the mental state of the human body changes with the change of the microcirculation. The voltage signals output by the alloy electrode sensor and the photoelectric sensor are amplified and filtered, and then transmitted to the A/D converter to become a digital signal. After being analyzed by the CPU, the voltage is compared with the normal value to intelligently judge the mental state of the human body. After analyzing the changes of the above two signal voltages, the CPU informs the user of the current human mental state index through the voice module circuit and the LCD. If the user's current mental state is poor and has a sense of drowsiness, the present invention will issue a reminder and an alarm signal according to the user's degree of fatigue. Vibration or pulse warning signals are applied to the user through the vibration module or the pulse module to stimulate and remind the user of the current mental state, thereby reducing the probability of accidents caused by drowsiness. Figure 3 is a flow chart showing the operation of the fatigue warning system of the present invention. When the user wears the sensor, the instrument will send a voice after receiving the signal: "Enter monitoring", otherwise use the voice prompt: "Please connect the sensor". If the instrument does not receive the signal within 30 seconds, it will automatically shut down. If the signal is received well, it will enter the monitoring state. When the human mental state changes, use the voice to remind: "Are you still okay?", then open the person Machine interaction function, the user answers "I am okay" by voice or presses the answer button. The central processor determines that the human body is in good mental state, and the instrument continues to monitor. If the instrument has three consecutive voice prompts, "Are you still okay?" The instrument determines that the user's mental state is depressed, and immediately starts buzzer, vibration or electric pulse warning.

Claims

Rights request

A fatigue warning system, comprising: a fatigue signal detecting device, a signal processing device, and a fatigue warning device, wherein: the fatigue signal detecting device comprises: an alloy electrode sensor for extracting a fatigue signal; the signal processing device comprising: The fatigue signal is converted into an analog signal processing circuit of an analog voltage signal, an A/D conversion circuit that converts the analog voltage signal into a digital signal, and a microprocessor that processes the digital signal; the fatigue warning device The method includes: at least one of a display, a voice prompt circuit, a vibration circuit, and a pulse circuit.

The fatigue warning system according to claim 1, wherein the negative electrode of the alloy electrode sensor in the fatigue signal detecting device is made of an aluminum alloy or a material containing an aluminum alloy, and the positive electrode is another metal material.

The fatigue warning system according to claim 2, wherein the fatigue signal detecting device further comprises a photoelectric sensor.

4. The fatigue warning system according to claim 1, wherein: said analog signal processing circuit comprises an amplifying circuit and a filtering shaping circuit.

5. The fatigue warning system according to claim 1, wherein: said microprocessor comprises a CPU, an input/output circuit, a ROM, a RAM, an oscillating circuit and a reset circuit.

6. A method for implementing fatigue warning for a user using a fatigue warning system, the method comprising the steps of: a starting up and connecting the sensor; b detecting whether there is a signal input, and if so, measuring the human mental state value; d Determine whether the human mental state value is within the normal range. If yes, execute step b. Otherwise, the e voice prompts, “Are you okay now?,,; f. Determine whether there is a button response or voice response. If yes, go to step 0, otherwise g Three voice prompts "Are you okay now? "; to determine whether there is a button response or voice response, if yes, execute step c, otherwise i output a pulse or vibration signal.

7. The method according to claim 6, wherein said step b further comprises the step of: bl if there is no signal input, the voice prompts "Please connect the sensor"; b2 determines whether there is a signal input within 30 seconds, if Then go to step c, otherwise b3 will shut down.

8. The method of claim 6 wherein said step d further comprises the step of: determining whether the current mental state value and the previous mental state value have changed, and if so, performing step e, otherwise performing step b.

A fatigue state detecting device comprising: an alloy electrode sensor for extracting a fatigue signal; and a photoelectric sensor for detecting a heart rate change of the microcirculation.

The fatigue state detecting device according to claim 9, wherein the negative electrode of the alloy electrode sensor is made of an aluminum alloy or a material containing an aluminum alloy, and the positive electrode is another metal material.

A fatigue warning system comprising the fatigue state detecting device according to claim 9.