CN101234016A - Physiological parameter measuring device - Google Patents
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Abstract
Description
技术领域 technical field
本发明涉及测量装置,特别是涉及一种生理参数测量装置。The invention relates to a measuring device, in particular to a physiological parameter measuring device.
背景技术 Background technique
生理参数的监测,可为使用者提供即时的信息反馈。尤其,对反映心血管系统机能的关键生理参数变化的监测,可为心脑血管疾病患者提供即时的信息反馈,具有非常重要的意义。The monitoring of physiological parameters can provide users with instant information feedback. In particular, the monitoring of changes in key physiological parameters reflecting the function of the cardiovascular system can provide immediate information feedback for patients with cardiovascular and cerebrovascular diseases, which is of great significance.
现在心电信号的检测装置,通常采用三导联或十二导联的传感器方式。例如采用三导联方式,需要把导线电极固定在两个手腕和一个脚腕上,通过导线采集人体生理信号,在通过处理器处理生成对应生理参数。现在心电信号的检测装置需要把电极直接固定于被测人体的皮肤上,采用直接接触方式测量心电信号。这种检测装置操作复杂,需要专业人员操作。The detection device of electrocardiogram signal generally adopts the sensor mode of three leads or twelve leads at present. For example, if the three-lead method is adopted, the wire electrodes need to be fixed on two wrists and one ankle, and the physiological signals of the human body are collected through the wires, and the corresponding physiological parameters are generated through processing by the processor. At present, the detection device of ECG signal needs to directly fix the electrodes on the skin of the human body to be measured, and measure the ECG signal in a direct contact mode. This detection device is complicated to operate and requires professionals to operate.
对于那些长期需要连续的生理参数监测的人群,就需要定期去医院接受生理参数检测。但这样也无法满足生理参数检测的需要,而且给使用者带来了很多的不便。现有检测装置无法满足长期需要连续生理参数监测的人群的要求。For those people who need continuous monitoring of physiological parameters for a long time, they need to go to the hospital regularly for physiological parameter testing. But this also cannot meet the needs of physiological parameter detection, and brings a lot of inconvenience to the user. Existing detection devices cannot meet the requirements of people who need continuous monitoring of physiological parameters for a long time.
近年来,利用日常生活中的装置来进行生理参数测量的方法已经在服装上被广泛研究和开发。如美国专利6801140中公开了如何将电路集成固定到衣服中的方法和系统。美国专利6842722中公开了在衣袖和手套中安装传感器来测量生理参数的系统。美国专利6930608中公开了一种有多个传感装置的服装,通过同时处理由两种不同的传感方法获得的信号确定穿衣人的生理状态并可将该信号在远程终端上显示。美国专利6930608利用在衣服上传感器监测thoracocardiograph(胸心电描记信号),得到多个心血管系统的生理参数。虽然现有的监测装置被应用到衣服上,但由于衣服的尺寸因人而异,无法做到通用性。In recent years, methods for measuring physiological parameters using devices in daily life have been extensively researched and developed on clothing. For example, US Patent No. 6,801,140 discloses a method and system for how to integrate and fix circuits into clothes. US Patent 6842722 discloses a system for measuring physiological parameters with sensors installed in sleeves and gloves. US Patent No. 6,930,608 discloses a garment with multiple sensing devices, which can determine the physiological state of the wearer by simultaneously processing signals obtained from two different sensing methods and display the signals on a remote terminal. US Patent No. 6,930,608 utilizes sensors on clothing to monitor thoracocardiograph (thoracic electrocardiographic signals) to obtain multiple physiological parameters of the cardiovascular system. Although the existing monitoring device is applied to clothes, because the size of the clothes varies from person to person, it cannot be universally used.
相对上述现有技术的缺陷,因此,如何提供一种生理参数测量装置,能够简化操作程序,具有良好的通用性,是本领域技术人员亟需解决的技术问题。Compared with the above-mentioned defects in the prior art, how to provide a physiological parameter measuring device that can simplify the operation procedure and have good versatility is a technical problem urgently needed to be solved by those skilled in the art.
发明内容 Contents of the invention
有鉴于此,本发明提供一种生理参数测量装置,能够简化操作程序,方便使用者操作,具有良好的通用性。In view of this, the present invention provides a physiological parameter measuring device, which can simplify the operation procedure, is convenient for the user to operate, and has good versatility.
本发明一种生理参数测量装置,包括传感装置和处理器;还包括座椅;所述传感装置固定在所述座椅上,用于采集使用者的生理信号;所述处理器与所述传感装置相连,用于接收所述传感装置采集的生理信号,处理所述生理信号得到相应的生理参数。A device for measuring physiological parameters in the present invention includes a sensing device and a processor; it also includes a seat; the sensing device is fixed on the seat for collecting physiological signals of the user; the processor and the connected to the sensing device for receiving physiological signals collected by the sensing device, and processing the physiological signals to obtain corresponding physiological parameters.
优选地,所述传感装置设置在所述座椅的椅座和两个扶手上。Preferably, the sensing device is arranged on the seat and two armrests of the seat.
优选地,所述传感装置包括电子织物。Preferably, the sensing device comprises an electronic textile.
优选地,所述传感装置还包括固定在所述座椅上的光电传感器和光电检测器。Preferably, the sensing device further includes a photoelectric sensor and a photodetector fixed on the seat.
优选地,所述处理器固定在所述座椅上。Preferably, said processor is fixed to said seat.
优选地,所述处理器为可分离式处理器,所述处理器集成在个人随身物品上。Preferably, the processor is a detachable processor, and the processor is integrated on personal belongings.
优选地,所述处理器对所述传感装置采集的生理信号进行预处理,再生成相应的生理参数。Preferably, the processor preprocesses the physiological signals collected by the sensing device to generate corresponding physiological parameters.
优选地,所述座椅的椅背与所述椅座之间的角度可调,所述角度范围为90-180度。Preferably, the angle between the seat back of the seat and the seat seat is adjustable, and the angle range is 90-180 degrees.
本发明还提供一种生理参数测量装置,包括传感装置和处理器;还包括床;所述传感装置固定在所述床上,用于采集使用者的生理信号;所述处理器与所述传感装置相连,用于接收所述传感装置采集的生理信号,处理所述生理信号得到相应的生理参数。The present invention also provides a physiological parameter measuring device, which includes a sensing device and a processor; also includes a bed; the sensing device is fixed on the bed for collecting physiological signals of the user; the processor and the The sensing device is connected to receive the physiological signal collected by the sensing device, and process the physiological signal to obtain corresponding physiological parameters.
优选地,所述传感装置设置在所述床的上部的三个位置。Preferably, the sensing device is arranged at three positions on the upper part of the bed.
优选地,所述传感装置包括电子织物。Preferably, the sensing device comprises an electronic textile.
优选地,所述传感装置还包括固定在所述床上的光电传感器和光电检测器。Preferably, the sensing device further includes a photoelectric sensor and a photodetector fixed on the bed.
优选地,所述处理器为可分离式处理器,所述处理器集成在个人随身物品上。Preferably, the processor is a detachable processor, and the processor is integrated on personal belongings.
优选地,所述处理器对所述传感装置采集的生理信号进行预处理,再生成相应的生理参数。Preferably, the processor preprocesses the physiological signals collected by the sensing device to generate corresponding physiological parameters.
与上述现有技术相比,本发明实施例具有以下优点:Compared with the above-mentioned prior art, the embodiments of the present invention have the following advantages:
本发明实施例所述装置,通过座椅作为测量载体,操作简单,不需要专业人员就可进行测量。本发明传感装置固定在座椅上,使用者只需坐到所述座椅上,就可以通过固定在所述座椅上的传感装置采集该使用者的生理信号;再把采集的生理信号传送到处理器进行处理,得到相应的生理参数。并且座椅作为测量载体,可以适应各种人群测量的需要,具有良好的通用性。The device described in the embodiment of the present invention uses the seat as a measurement carrier, is easy to operate, and can be measured without the need for professionals. The sensing device of the present invention is fixed on the seat, and the user only needs to sit on the seat to collect the physiological signal of the user through the sensing device fixed on the seat; The signal is sent to the processor for processing to obtain corresponding physiological parameters. And the seat, as a measurement carrier, can adapt to the measurement needs of various groups of people and has good versatility.
进一步,本发明采用电子织物作为电极采集使用者的生理信号,而无需把电极直接固定在使用者的身体上,使用者可在穿着衣衫的情况下将身体与该电子织物接触,实现非接触方式的生理信号采集,从而实现了生理参数的非接触式测量。Further, the present invention uses the electronic fabric as the electrode to collect the user's physiological signal without directly fixing the electrode on the user's body, and the user can touch the body with the electronic fabric while wearing clothes to realize the non-contact method. Physiological signal acquisition, so as to realize the non-contact measurement of physiological parameters.
附图说明 Description of drawings
图1为本发明所述装置第一种实施方式结构示意图;Fig. 1 is a schematic structural view of the first embodiment of the device of the present invention;
图2为本发明所述装置工作原理示意图;Fig. 2 is a schematic diagram of the working principle of the device of the present invention;
图3为本发明所述装置采集的心电信号和光电容积描记信号;Fig. 3 is the electrocardiographic signal and the photoplethysmography signal that the device of the present invention collects;
图4为本发明所述装置第二种实施方式结构示意图。Fig. 4 is a schematic structural diagram of the second embodiment of the device of the present invention.
具体实施方式 Detailed ways
本发明提供一种生理参数测量装置,能够简化操作程序,方便使用者操作,具有良好的通用性。The invention provides a physiological parameter measuring device, which can simplify the operation procedure, is convenient for users to operate, and has good versatility.
本发明提供一种生理参数测量装置,当使用所述装置进行测量时,使用者只需坐到所述座椅上,通过固定在所述座椅上的传感装置采集该使用者的生理信号;再把采集的生理信号传送到处理器进行处理,得到相应的生理参数。The invention provides a device for measuring physiological parameters. When the device is used for measurement, the user only needs to sit on the seat, and the user's physiological signal is collected through a sensing device fixed on the seat. ; and then transmit the collected physiological signal to the processor for processing to obtain corresponding physiological parameters.
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图和具体实施方式对本发明作进一步详细的说明。In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
参见图1,该图为本发明所述装置第一种实施方式结构图。Referring to Fig. 1, this figure is a structural diagram of the first embodiment of the device of the present invention.
本发明生理参数测量装置第一种实施方式,生理参数测量装置包括传感装置1、处理器2和座椅3。传感装置1具体为电子织物11,电子织物11固定在座椅3上,用于采集使用者的生理信号。处理器2与电子织物11相连,用于接收电子织物11采集的生理信号,处理该生理信号,得到相应的生理参数。In the first embodiment of the physiological parameter measuring device of the present invention, the physiological parameter measuring device includes a sensing device 1 , a
座椅3包括椅座31、椅背32和扶手33。电子织物11设置在所述座椅3的椅座31和两个扶手33上。The seat 3 includes a
当使用者使用本发明所述装置进行生理参数测量时,使用者需坐到所述座椅3上,把两支手臂放到扶手33上。这时,安装在椅座31和两个扶手33上电子织物11就可以果集使用者生理信号。之后通过导线等信号传递介质将采集的生理信号传送到处理器2,由处理器2进行处理,得到相应的生理参数。本发明所述装置操作简单,不需要专业人员就可进行测量。并且以座椅作为测量载体,可以适应各种人群测量的需要,具有良好的通用性。When the user uses the device of the present invention to measure physiological parameters, the user needs to sit on the seat 3 and put two arms on the
参见图2,该图为本发明所述装置工作原理示意图。Referring to Fig. 2, this figure is a schematic diagram of the working principle of the device of the present invention.
传感装置1用于采集使用者生理信号。传感装置1再把采集的生理信号传送到处理器2,由处理器2进行处理,得到相应的生理参数。处理器2将经过处理得到的生理参数,发送到显示单元5进行显示。The sensing device 1 is used for collecting physiological signals of a user. The sensing device 1 transmits the collected physiological signals to the
显示单元5可以是远方终端的电脑或服务器,也可以通过PDA等掌上设备实现显示功能。The
本发明优选实施方式,椅座31和椅背32之间的角度是可调的,可以在90度到180度范围内调节。这样可以方便不同使用者的需求,当椅座31和椅背32之间的角度是180度时,座椅3就相当于测量床,使用者可以躺在所述座椅3上,进行测量。由于椅座31和椅背32之间角度可调,可以是使用者选择舒适的姿势进行测量,设计更加人性化。In a preferred embodiment of the present invention, the angle between the
广义而言,传感装置可以分为两大类,一类是传统的传感器,如电极,光敏元件等;另一类是具有导电特性的E-textile(电子织物)。本发明优选方式,传感装置1可以为具有导电特性的电子织物。Broadly speaking, sensing devices can be divided into two categories, one is traditional sensors, such as electrodes, photosensitive elements, etc.; the other is E-textile (electronic fabric) with conductive properties. In a preferred manner of the present invention, the sensing device 1 may be an electronic fabric with conductive properties.
本发明优选方式采用电子织物11作为电极采集使用者的心电信号,而无需把电极固定在使用者的身体上。使用者只需将身体部位与该电子织物接触,便可采集该使用者的心电信号。这里电子织物相当于传统采集心电信号的电极,在采集信号时并无特殊性。The preferred mode of the present invention uses the
为防止皮肤直接接触可能会降低电子织物的性能,可在座椅扶手上的电子织物上覆盖一层纸或布等中介介质,实现皮肤与电子织物的非接触式测量。In order to prevent direct skin contact from degrading the performance of the electronic fabric, an intermediary medium such as paper or cloth can be covered on the electronic fabric on the armrest of the seat to realize non-contact measurement between the skin and the electronic fabric.
本发明所述装置采集到的心电信号示意图如图3所示。The schematic diagram of the ECG signal collected by the device of the present invention is shown in FIG. 3 .
图3中的心电信号示意图的特征点--R波清晰可见。由于R波是许多生理参数计算中的一个最重要的特征点,因此采集心电信号具有重要的意义。The characteristic point of the schematic diagram of the ECG signal in Fig. 3 - the R wave is clearly visible. Since the R wave is one of the most important feature points in the calculation of many physiological parameters, it is of great significance to collect ECG signals.
本发明所述装置还可以实现血压的测量。当使用本发明所述装置进行血压测量时,传感装置1除需要采集心电信号外,还需要采集容积描记信号。The device of the present invention can also realize the measurement of blood pressure. When using the device of the present invention to measure blood pressure, the sensing device 1 needs to collect plethysmographic signals in addition to electrocardiographic signals.
PPG(光电容积描记信号)可以通过发光二极管和光电检测器从手指处采集。容积描记原理是将肢体血流量变化引起的容积改变,通过光电检测器记录下来,并以图形方式表现出来。容积描记信号的采集为公知信息,在此不再详述。PPG (photoplethysmographic signal) can be collected from the finger by light-emitting diodes and photodetectors. The principle of plethysmography is to record the volume change caused by the change of blood flow in the limbs through the photoelectric detector and display it graphically. Acquisition of plethysmographic signals is known information and will not be described in detail here.
因此,本发明优选实施方式,传感装置1还包括发光二极管(图中未示出)和光电检测器12。发光二极管和光电检测器12固定在座椅3的一个扶手33上,参见图1所示。这样可以很方便的从使用者手指处采集光电容积描记信号。具体采集光电容积描记信号可以参见图2所示。Therefore, in a preferred embodiment of the present invention, the sensing device 1 further includes a light emitting diode (not shown in the figure) and a
在本实施例中,处理器2可安装在椅座3的下方。利用导线将电子织物11采集到的心电信号,以及发光二极管和光电检测器12采集到的光电容积描记信号,传递到处理器2。In this embodiment, the
由于在不同的应用条件下,采集的生理信号可能会在一定程度上受到运动噪声的干扰。因此优选方式,处理器2要对采集到的原始生理信号进行滤波、放大等预处理。Due to different application conditions, the collected physiological signals may be interfered by motion noise to a certain extent. Therefore, in a preferred manner, the
传感装置1检测的人体生理信号包括声音信号、电信号、光信号、压力信号、电磁信号和运动信号中的至少一种。检测到的生理信号可以通过无线通信方式和有线通信方式中的至少一种与处理器2相连接。The human physiological signals detected by the sensing device 1 include at least one of sound signals, electrical signals, light signals, pressure signals, electromagnetic signals and motion signals. The detected physiological signal can be connected with the
在无线通信方式下,信号能量可以以电磁波、声波、光波等信息载体通过红外传输或射频传输方式传递。In the wireless communication mode, the signal energy can be transmitted by infrared transmission or radio frequency transmission in the form of electromagnetic waves, sound waves, light waves and other information carriers.
在有线通信方式下,信号能量可以通过导线和光纤等信息载体传递。导线也可以由电子织物实现。In wired communication, signal energy can be transmitted through information carriers such as wires and optical fibers. Conductive wires can also be realized by e-textiles.
处理器2可以固定在本发明所述座椅3上,也可以固定或者集成在手表、PDA或手机等个人随身物品中。The
本发明所述传感装置1采集到的生理信号,经过处理器2处理后可以得到使用者的血压,血压变化率,心率,心率变化率,呼吸频率,血氧饱和度,心电图和容积描记图等生理参数。处理器2经过对心电图和容积描记图的分析可以得到上述生理参数。处理器2的这种分析过程为现有技术,在此不再赘述。The physiological signal collected by the sensing device 1 of the present invention can be processed by the
本发明优选实施方式,本发明所述装置测量得到的生理参数可以以射频或无线的方式传递到其他终端,实现远程控制和检测。In a preferred embodiment of the present invention, the physiological parameters measured by the device of the present invention can be transmitted to other terminals in a radio frequency or wireless manner to realize remote control and detection.
本发明所述装置测量得到的生理参数也可以用来启动、调节和控制与本发明所述装置配套的保健治疗装置。该保健治疗装置是通过声音信号、电信号、压力信号或光信号作用来调节人体的生理状态。该保健治疗装置可以是微型音乐播放器、微型电针、压力装置或眼镜。此外,该保健治疗装置的用户界面包括显示或声音报警方式中的至少一种。The physiological parameters measured by the device of the present invention can also be used to start, adjust and control the health care treatment device matched with the device of the present invention. The health treatment device regulates the physiological state of the human body through the action of sound signals, electric signals, pressure signals or light signals. The health treatment device can be a miniature music player, a miniature electric needle, a pressure device or glasses. In addition, the user interface of the healthcare treatment device includes at least one of a display or an audible alarm.
参见图4,该图为本发明所述装置第二种实施方式结构图。Refer to Fig. 4, which is a structural diagram of the second embodiment of the device of the present invention.
本发明第二种生理参数测量装置,包括传感装置1和处理器2;还包括床4。传感装置1固定在床4上,用于采集使用者的生理信号。处理器2与传感装置1相连,用于接收传感装置1采集的生理信号,并且对该生理信号进行处理,得到相应的生理参数。The second physiological parameter measuring device of the present invention includes a sensing device 1 and a
传感装置1设置在所述床的上部的三个位置。传感装置1优选方式为电子织物11。The sensing device 1 is arranged at three positions on the upper part of the bed. The sensing device 1 is preferably an
本发明所述装置采用电子织物11作为电极,电子织物11固定在床的上部。电子织物11的位置即人体躺下后的两肩及背部位置。当使用者平躺在所述床上时,电子织物11可以采集使用者的心电信号。再通过对所得到的心电图进行分析,可以得到该使用者的心率。通常是处理器2通过计算心电信号R波之间的时间间隔得到心率。The device of the present invention adopts the
为防止使用者肌肤与电子织物11的直接接触,而导致降低电子织物的性能。本发明优选方式,在使用者与电子织物11之间增加纸或者布等中介介质,实现非接触式方式的测量。In order to prevent the direct contact between the user's skin and the
本发明所述装置还可以实现血压的测量。当测量血压时,传感装置1除测量心电信号外,还需要采集容积描记信号。The device of the present invention can also realize the measurement of blood pressure. When measuring blood pressure, the sensing device 1 needs to collect plethysmographic signals in addition to measuring electrocardiographic signals.
发光二极管和光电检测器用于检测使用者的容积描记信号。光电容积描记信号(PPG)可以通过发光二极管和光电检测器从手指处采集。Light emitting diodes and photodetectors are used to detect the user's plethysmographic signal. The photoplethysmographic signal (PPG) can be collected from the finger by light-emitting diodes and photodetectors.
本发明优选实施方式,传感装置1还包括发光二极管和光电检测器。In a preferred embodiment of the present invention, the sensing device 1 further includes a light emitting diode and a photodetector.
发光二极管和光电检测器固定在床4的一侧上,参见图3所示。这样可以很方便的从使用者手指处采集光电容积描记信号。The light-emitting diodes and photodetectors are fixed on one side of the
处理器2可以是固定在装置上或是集成在手表、PDA或手机等个人随身物品中。The
根据脉搏波传输理论,脉搏波传输时间可用于本发明所述装置的血压测量。脉搏波传输时间可根据使用者的心电信号和光电容积描记信号得到。心电信号的特征点在本发明的实施例中可以优选为心电信号上R型波的顶点。光电容积描记信号的特征点在本发明的实施例中可以是光电容积描记信号波形的顶点、底点及中间点。特征点之间的时间间隔即为脉搏波传输时间。利用脉搏波传输时间测量血压的方法在多篇文献中均有记载,此处不再赘述。According to the pulse wave transmission theory, the pulse wave transit time can be used for the blood pressure measurement of the device of the present invention. The pulse wave transit time can be obtained according to the user's electrocardiographic signal and photoplethysmographic signal. In the embodiment of the present invention, the characteristic point of the electrocardiographic signal may preferably be the apex of the R-shaped wave on the electrocardiographic signal. In the embodiment of the present invention, the characteristic points of the photoplethysmography signal may be the apex, bottom point and middle point of the photoplethysmography signal waveform. The time interval between feature points is the pulse wave transit time. The method of measuring blood pressure by using the pulse wave transit time has been recorded in many documents, and will not be repeated here.
本领域的普通技术人员应该明白,对脉搏波传输时间的测量可以采用多种方法而不仅限于上述内容。Those skilled in the art should understand that various methods can be used to measure the pulse wave transit time and are not limited to the above-mentioned ones.
例如光电容积描记信号也可以用电阻抗信号或心音信号替代,在这些信号上取适当的参考点,然后通过计算该参考点与心电信号中的参考点在时间轴上的时间间隔就可以确定出脉搏波传输时间。心音信号可通过听诊器采集,电阻抗可通过阻抗传感器采集。For example, the photoplethysmography signal can also be replaced by an electrical impedance signal or a heart sound signal, and an appropriate reference point is taken on these signals, and then it can be determined by calculating the time interval between the reference point and the reference point in the ECG signal on the time axis Pulse wave transit time. The heart sound signal can be collected by a stethoscope, and the electrical impedance can be collected by an impedance sensor.
利用脉搏波传输时间理论测量血压,需要对装置事先进行校准。Measuring blood pressure using the pulse wave transit time theory requires prior calibration of the device.
为实现本发明装置的血压校准功能,本发明所述装置的座椅扶手需要是角度及高度可以调节的。在扶手33上安装三方向型加速度计和距离量度传感器。三方向型加速度计和距离量度传感器是用来测量手臂的运动情况。该运动情况包括手臂运动段的长度l和运动角度θ,比如抬高的角度θ。距离量度传感器可作为座椅的附件,在使用时,再朝上固定在手臂上。In order to realize the blood pressure calibration function of the device of the present invention, the armrest of the device of the present invention needs to be adjustable in angle and height. A three-way accelerometer and a distance measuring sensor are installed on the
利用三方向型加速度计及距离量度传感器,可以确定手臂运动段与心脏水平面之间的高度。具体过程如下:Using a tri-directional accelerometer and a distance-measuring sensor, the height between the segment of the arm motion and the level of the heart can be determined. The specific process is as follows:
首先要量度手臂运动段的长度,在手臂相应运动段的终点位置安装距离量度传感器,然后把另一只手放到手臂运动段的起点,并将手心对着距离量度传感器,该传感器便能量度手臂运动段的长度。换算公式(1)如下:First of all, measure the length of the arm movement segment, install the distance measurement sensor at the end position of the corresponding arm movement segment, then put the other hand on the starting point of the arm movement segment, and face the distance measurement sensor with the palm of the hand, the sensor will measure The length of the arm motion segment. The conversion formula (1) is as follows:
L=28.8/Vlength(1)L=28.8/V length (1)
其中,Vlength为距离量度传感器的上传电压。Wherein, V length is the upload voltage of the distance measuring sensor.
加速度计可以内置在手表上,配带装配了3方向型加速度计的手表在手腕上,便能量度出手臂运动段与肩膀或心脏水平面之间的角度,3方向中的X-轴跟Y-轴是用来检测垂直角度的,从3方向型加速传感器上传的类比信号,可从通过以下方程式(2)换算出角度。The accelerometer can be built into the watch, equipped with a watch equipped with a 3-direction accelerometer on the wrist, it can measure the angle between the arm movement segment and the shoulder or heart level, the X-axis and Y-axis in the 3 directions The axis is used to detect the vertical angle, and the analog signal uploaded from the 3-direction accelerometer can be converted to the angle by the following equation (2).
X0g,Z0g和S1g为出厂前定义。X 0g , Z 0g and S 1g are defined before leaving the factory.
为确保三方向型加速度计的上传数据准确,它在使用前必须测试并记下各轴最大值及最小值。In order to ensure that the uploaded data of the tridirectional accelerometer is accurate, it must be tested and recorded the maximum and minimum values of each axis before use.
为了保证手臂的角度正确,Y-轴的角度要保持接近0°,如Y-轴角大于5°,X-轴跟Z-轴取回来的角度便会有很大的差误。In order to ensure the correct angle of the arm, the angle of the Y-axis should be kept close to 0°. If the angle of the Y-axis is greater than 5°, there will be a large difference between the angles retrieved by the X-axis and the Z-axis.
最后,手臂与心脏的高度便能从以下算式(3)计算。Finally, the height of the arm and the heart can be calculated from the following formula (3).
h=L×sin(α)+χH (3)h=L×sin(α)+χ H (3)
若手臂的运动是以肩膀为轴的,则χH是心脏与肩膀的高度。若手臂的运动是以肘关节为轴的且肘关节与心脏在同一水平面时,则χH为零。If the movement of the arm is based on the shoulder, then χ H is the height between the heart and the shoulder. If the movement of the arm is based on the elbow joint and the elbow joint is at the same level as the heart, then χ H is zero.
由于手臂运动段的长度已知,所以,手臂可以持续运动,并在过程中对手臂运动的高度变化做连续记录。结合同时记录的心电信号和光电容积描记信号并据此计算出脉搏波传输时间,即可对血压计进行校准。Since the length of the arm movement segment is known, the arm can continue to move, and the height change of the arm movement is continuously recorded during the process. The sphygmomanometer can be calibrated by combining the simultaneously recorded ECG and photoplethysmographic signals and calculating the pulse wave transit time accordingly.
在校准过程中,还需要知道参考血压值BP0。该血压值除可以通过振荡法或听诊法测量外,也可以通过手臂运动段抬高的高度和固定的压力传感器来计算获得。其主要原理是当经皮压力为零,即血管内压和外压相等时,容积描记信号的幅度将达到最大值。因此,通过在采集容积描记信号时施加一定的外界压力并利用一个压力传感器记录下该压力,即可在手臂高度相对于心脏变化的过程中找到平均压值。During the calibration process, it is also necessary to know the reference blood pressure value BP 0 . In addition to being measured by the oscillation method or auscultation method, the blood pressure value can also be calculated by the height of the arm movement segment and a fixed pressure sensor. The main principle is that when the percutaneous pressure is zero, that is, when the intravascular pressure and external pressure are equal, the amplitude of the plethysmographic signal will reach the maximum value. Therefore, by applying a certain external pressure while acquiring the plethysmographic signal and recording this pressure with a pressure transducer, the mean pressure value can be found during the variation of the arm height relative to the heart.
具体方法是,在采集容积描记信号的肢体位置,如手指或手臂上某一位置,施加一定的周向压力,压力传感器将读出外加压力即血管的外压Pe。然后,在缓慢改变肢体相对于心脏高度的过程中记录施加压力处的容积描记信号波形。再后,根据记录的波形确定波形幅度达到最大时对应的肢体高度h,肢体高度h可通过加速度计自动测得。最后,即可由下列方程(4)计算得到参考平均血压值。The specific method is to apply a certain circumferential pressure at the position of the limb where the plethysmographic signal is collected, such as a finger or a certain position on the arm, and the pressure sensor will read the applied pressure, that is, the external pressure P e of the blood vessel. Then, the plethysmographic signal waveform at the applied pressure was recorded during the process of slowly changing the height of the limb relative to the heart. Then, according to the recorded waveform, determine the corresponding limb height h when the waveform amplitude reaches the maximum, and the limb height h can be automatically measured by the accelerometer. Finally, the reference average blood pressure value can be calculated by the following equation (4).
BP0=Pe-ρgh (4)BP 0 =P e -ρgh (4)
其中,ρ为血液密度,g为重力加速度。Among them, ρ is the blood density, and g is the acceleration due to gravity.
当肢体部位位于心脏上方时,h为负值;反之,则为正值。When the limb part is above the heart, h is negative; otherwise, it is positive.
采用上述方法,本发明所述装置本身即可完成无袖带式血压测量的校准,而无需其他额外装置,大大简化了血压测量的校准的过程。By adopting the above method, the device of the present invention can complete the calibration of the cuffless blood pressure measurement by itself without requiring other additional devices, which greatly simplifies the calibration process of the blood pressure measurement.
除了血压外,心率、心率变化率、呼吸频率和血氧饱和度等的测量都可以利用光电容积描记法实现。同时,心率、心率变化率和呼吸频率也可以通过心电图得到。In addition to blood pressure, measurements of heart rate, heart rate change rate, respiratory rate, and blood oxygen saturation can all be achieved using photoplethysmography. At the same time, the heart rate, heart rate variability and respiratory rate can also be obtained through the electrocardiogram.
通过计算光电容积描记信号相邻两个顶点或相邻两个底点之间的时间间隔(intervali)即可计算出心率值。为了减小计算误差,我们可以采用多个时间间隔的平均(Ave_interval)来计算瞬时心率(HR),如公式(5)和(6)所示。通过该时间间隔亦可计算心率变化率,其为一定个数的时间间隔的标准方差。The heart rate value can be calculated by calculating the time interval (intervali) between two adjacent peaks or two adjacent bottom points of the photoplethysmography signal. In order to reduce the calculation error, we can use the average (Ave_interval) of multiple time intervals to calculate the instantaneous heart rate (HR), as shown in formulas (5) and (6). From this time interval it is also possible to calculate the rate of heart rate change, which is the standard deviation of a certain number of time intervals.
同样的,通过计算心电图上相邻两个R型波的顶点之间的时间间隔(intervali)也可计算出心率值。进而计算出心率变化率,即一定时间内心率方差与均值的比值。我们提出采用双信号模式计算心率和心率变化率,以保证在存在杂波的情况下,仍然可以准确地得到所需要的生理参数的数值。双信号模式是指利用光电容积描记信号和心电信号分别计算心率和心率变化率,如果二者的计算结果相差小于5%或10%,即确认测量有效。Similarly, the heart rate value can also be calculated by calculating the time interval (intervali) between the peaks of two adjacent R-shaped waves on the electrocardiogram. Then calculate the heart rate rate of change, that is, the ratio of the heart rate variance to the mean value within a certain period of time. We propose to use the dual-signal mode to calculate the heart rate and the rate of change of the heart rate to ensure that the required physiological parameters can still be accurately obtained in the presence of clutter. The dual-signal mode refers to using the photoplethysmography signal and the electrocardiogram signal to calculate the heart rate and heart rate change rate respectively. If the difference between the two calculation results is less than 5% or 10%, the measurement is confirmed to be valid.
此外,容积描记信号中明显的还包括有呼吸的信息。利用容积描记信号提取呼吸频率的方法近年来在文献中被广泛讨论。选取适当的滤波器进行低通滤波,即可得到呼吸波形,从而计算出呼吸频率。与心率计算相同,呼吸频率的计算我们同样地采取双信号模式确保计算的准确性。In addition, the plethysmographic signal obviously includes breathing information. Methods for extracting respiratory rate using plethysmographic signals have been widely discussed in the literature in recent years. Select an appropriate filter for low-pass filtering to obtain the respiratory waveform and calculate the respiratory frequency. Same as heart rate calculation, we also adopt dual-signal mode to ensure the accuracy of the calculation of respiratory rate.
由于血液中的两种主要吸光的物质,氧合血红蛋白和血红蛋白在红光范围和红外光范围对光的吸收程度不一样,因此通过利用两种波长的光即可确定动脉血氧饱和度。其具体实现电路可在“Design of Pulse Oximeters”by J GWebseter中查到。Since the two main light-absorbing substances in blood, oxyhemoglobin and hemoglobin, absorb light differently in the red light range and infrared light range, arterial blood oxygen saturation can be determined by using two wavelengths of light. Its specific implementation circuit can be found in "Design of Pulse Oximeters" by J GWebseter.
测量到的这些生理参数除了可以为使用者时时提供表征其健康情况的生理参数,还可以通过射频或无线的方式传递到其他终端,比如医学中心。同时,这些生理参数也可以用来启动、调节和控制与衣服配套的保健治疗装置。These measured physiological parameters can not only provide users with physiological parameters that characterize their health conditions, but also transmit them to other terminals, such as medical centers, through radio frequency or wireless means. At the same time, these physiological parameters can also be used to activate, adjust and control the health treatment device matched with the clothes.
在不同的应用条件下,信号也可能会在一定程度上受到运动噪声的干扰。因此,处理器2要对采集到的原始信号进行滤波、放大等预处理。Under different application conditions, the signal may also be disturbed by motion noise to a certain extent. Therefore, the
本发明所述装置还可以与保健治疗装置相配合使用。The device of the present invention can also be used in conjunction with a health care device.
有两种工作模式:使用者可以通过测量生理参数来启动刺激单元;亦可主动在感觉有需要时直接启动刺激单元。该保健治疗装置是通过声音信号、电信号、压力信号或光信号作用来调节人体的生理状态,它可以是但不限于微型音乐播放器、微型电针、压力装置或眼镜等设备。There are two working modes: the user can activate the stimulation unit by measuring physiological parameters; the user can also actively activate the stimulation unit directly when feeling the need. The health treatment device regulates the physiological state of the human body through the action of sound signals, electrical signals, pressure signals or light signals, and it can be but not limited to equipment such as miniature music players, miniature electric needles, pressure devices or glasses.
以上对本发明所提供的一种生理参数测量装置,进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。Above, a kind of physiological parameter measurement device provided by the present invention has been introduced in detail. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above examples is only used to help understand the method of the present invention. and its core ideas. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention.
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