WO2014101466A1 - 一种血压测量仪 - Google Patents

一种血压测量仪 Download PDF

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Publication number
WO2014101466A1
WO2014101466A1 PCT/CN2013/083099 CN2013083099W WO2014101466A1 WO 2014101466 A1 WO2014101466 A1 WO 2014101466A1 CN 2013083099 W CN2013083099 W CN 2013083099W WO 2014101466 A1 WO2014101466 A1 WO 2014101466A1
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Prior art keywords
pulse wave
blood pressure
state
sensing device
signal
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PCT/CN2013/083099
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English (en)
French (fr)
Inventor
明利强
刘方
孙业军
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/02108—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1118—Determining activity level
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7271—Specific aspects of physiological measurement analysis
    • A61B5/7296—Specific aspects of physiological measurement analysis for compensation of signal variation due to stress unintentionally induced in the patient, e.g. due to the stress of the medical environment or examination

Definitions

  • the present application relates to the field of medical devices, and in particular to a blood pressure measuring instrument.
  • non-invasive blood pressure measurements are typically performed using cuff punching and oscillometric methods to detect non-invasive blood pressure. That is, a pulse wave sensing device is installed inside the sleeve, and the sensed pulse wave is transmitted through the airway tube to the main control portion of the non-invasive blood pressure measuring device. The main control part is converted into a digital signal by signal acquisition, and then the blood pressure value is calculated using a professional algorithm.
  • the detection of the posture and movement of the subject's arm is ignored.
  • blood pressure measurement has a great relationship with the posture and movement of the subject's arm.
  • the measured blood pressure accuracy and reference value are different.
  • the blood pressure value in the sleep state of the subject is lower than that in the awake state, and this can be judged by whether the posture of the arm is flat.
  • the blood pressure value is often inaccurate or unreliable due to interference caused by exercise.
  • the traditional sphygmomanometer does not consider these scenarios, especially in the case of home and long-term monitoring where the medical staff are not on site, and the blood pressure values measured are uniformly treated. Therefore, the measured blood pressure value is used to judge that the subject is high. Blood pressure or hypotension is obviously unreasonable.
  • the present application provides a blood pressure measuring instrument capable of detecting state information of a measured part at the same time when measuring blood pressure, so that more reference information is obtained when determining according to the blood pressure value.
  • the present application provides a blood pressure measuring instrument comprising:
  • a pulse wave sensing device for sensing a pulse wave of a detected object and outputting a pulse wave signal.
  • the state sensing device is configured to sense the state of the detected object and output state information.
  • the host includes a signal processing circuit
  • the signal processing circuit is respectively connected to the pulse wave sensing device and the state sensing device, and receives the pulse wave signal output by the pulse wave sensing device and the state information output by the state sensing device, according to the pulse wave signal
  • the blood pressure value is calculated, and the blood pressure is monitored according to the state information of the object to be detected.
  • the present application provides another blood pressure measuring instrument comprising:
  • a pulse wave sensing device for sensing a pulse wave of a detected object and outputting a pulse wave signal.
  • the state sensing device is configured to sense the state of the detected object and output state information.
  • the host includes a signal processing circuit and an output module, wherein the signal processing circuit is respectively connected to the pulse wave sensing device and the state sensing device for receiving the pulse wave signal output by the pulse wave sensing device and the state information output by the state sensing device Calculating a blood pressure value according to the pulse wave signal, and outputting the blood pressure value and the state information; the output module is connected to the signal processing circuit, and displays the blood pressure value output by the signal processing circuit and the state information of the detected object through sound or visibility. Mode output.
  • the blood pressure measuring instrument while obtaining the blood pressure value, senses the state information of the detected object through the state sensing device, and monitors the blood pressure according to the state information of the detected object to ensure that the obtained blood pressure value is more accurate. reliable.
  • FIG. 1 is a schematic block diagram of a blood pressure measuring instrument according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the principle of an attitude sensor according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a principle of a motion condition sensor according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a state recognition module according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a blood pressure measuring instrument according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of a pulse wave in which an interference signal exists in an embodiment of the present application.
  • Fig. 7 is a schematic view showing the pulse wave corrected in Fig. 6.
  • the blood pressure measuring instrument includes a pulse wave sensing device 101 , a state sensing device 100 , and a host 110 .
  • the host 110 includes a signal processing circuit 109 and an output module 105.
  • the signal processing circuit 109 includes a pulse wave acquiring module 103.
  • the pulse wave sensing device 101 is for sensing a pulse wave of a subject to be detected and outputting a pulse wave signal.
  • the pulse wave acquisition module 103 is connected to the pulse wave sensing device 101. In some cases, for example, when the pulse wave acquisition module 103 is far away from the pulse wave sensing device 101, the pulse wave acquisition module 103 and the pulse wave sensing device 101 can be wired or The wireless connection may be performed by a pulse wave transmission device 102.
  • the pulse wave transmission device 102 may specifically be a data line, and the pulse wave transmission device 102 transmits the pulse wave signal output by the pulse wave sensing device 101 to the pulse wave collection.
  • the pulse wave acquisition module 103 processes the pulse wave signals, such as amplification, filtering, and/or analog to digital conversion.
  • the blood pressure calculation module 104 is connected to the pulse wave acquisition module 103 for performing algorithm processing on the collected pulse waves to obtain a blood pressure value.
  • the pulse wave acquisition module 103 is an optional module. When the pulse wave acquisition module 103 is omitted, the analog to digital conversion function can be designed in the blood pressure calculation module 104.
  • the blood pressure measuring instrument can measure the blood pressure by using the oscillometric method.
  • the pulse wave sensing device 101 is a pressure sensor; the blood pressure measuring instrument can also measure the blood pressure by the Korotkoff sound method, and the corresponding pulse wave sensing device 101 is a sound. sensor.
  • the state sensing device 100 is configured to sense a state in which the detected object is located, and output state information.
  • the state identification module 108 is coupled to the state sensing device 100 for collecting state information from the state sensing device 100 and processing the state information.
  • the output module 105 is connected to the blood pressure calculation module 104 and the state recognition module 108, respectively, and outputs the blood pressure value obtained by the blood pressure calculation module 104 and the state information of the detected object processed by the state recognition module 108.
  • the output module 105 may be a sound playing module that outputs the blood pressure value and the state information of the detected object by sound.
  • the output module 105 may be a display module that displays the blood pressure value and the state information of the detected object on the display screen in the form of visibility information.
  • the state sensing device 100 is an attitude sensor 106 for detecting a detected portion of the object to be detected, for sensing the posture of the detected object, and outputting a posture condition signal as status information.
  • the state recognition module 108 is connected to the attitude sensor 106, samples from the attitude condition signal output from the attitude sensor 106, and determines the posture of the detected object based on the attitude condition signal.
  • the state sensing device 100 is a motion condition sensor 107 for setting a measured portion of the detected object, for sensing the motion of the measured portion, and outputting a motion condition signal as the state of the measured portion.
  • Information such as acceleration information or speed information.
  • the state recognition module 108 is connected to the motion condition sensor 107 for collecting a motion condition signal from the motion condition sensor 107, and determining a motion state of the detected portion, for example, a motion speed of the detected portion, according to the motion condition signal, thereby obtaining Know if the detected object is in motion.
  • the state sensing device can include both the attitude sensor 106 and the motion condition sensor 107 for sensing the posture and motion of the detected portion of the detected object, and outputting the attitude condition signal and the motion condition signal.
  • the state recognition module 108 is connected to the attitude sensor 106 and the motion condition sensor 107, respectively, for collecting the attitude condition signal and the motion condition signal from the attitude sensor 106 and the motion condition sensor 107, and determining according to the attitude condition signal and the motion condition signal. The posture and motion of the detected object.
  • the attitude sensor 106 can be a gyroscope or a gravity sensing sensor. Referring to FIG. 2, when the attitude sensor 106 is a gyro sensor, it can output two dimensions of the motion of the measured part, which are the inclination 403 and the twist 404. The two signals can determine the posture of the measured part.
  • the reference plane 401 is rotated to the current posture plane 402 by the inclination 403 and the twist 404.
  • the posture of the measured part is The plane formed by the Y-axis and the Z-axis is parallel; when the inclination is 0 degree and the twist is 90 degrees, the posture of the measured portion (ie, the current posture plane) is parallel to the plane formed by the X-axis and the Z-axis.
  • the state recognition module 108 can determine the posture of the measured part through a corresponding algorithm according to the inclination and the twist, and output through the output module 105.
  • the state recognition module 108 can calculate the motion speed of the measured portion according to the three-dimensional acceleration information, and output it through the output module.
  • attitude sensor 106 is a sensor other than the gyro sensor
  • motion sensor 107 is a sensor other than the acceleration sensor
  • the output signal thereof will be different, but the invention according to the present application can also be obtained. Status information of the part to be tested.
  • the state recognition module 108 specifically implements amplification and filtering processing on the collected signal.
  • the state recognition module 108 includes a carrier circuit 201, a closed loop driving circuit 202, a preamplifying circuit 203, and post processing. Circuit 204.
  • the carrier circuit 201 and the closed loop drive circuit 202 are respectively connected to the state sensing device 100 for modulating the signal of the state information output by the state sensing device 100.
  • the preamplifier circuit 203 is connected to the state sensing device 100 for acquiring state information modulated by the carrier circuit 201 and the closed loop driving circuit 202 from the state sensing device 100, and converting it into a differential voltage signal according to a preset accuracy and gain.
  • the post-processing circuit 204 is connected to the preamplifier circuit 203 for acquiring a differential voltage signal from the preamplifier circuit 203, demodulating it, and obtaining state information of the state in which the object to be detected is located.
  • the post processing circuit 204 includes a first filter amplifying circuit 301, a first demodulating circuit 302, a second filter amplifying circuit 303, a second demodulating circuit 304, a low pass filtering circuit 305, and a DC amplifying circuit 306 which are sequentially connected.
  • the first filter amplifying circuit 301 is connected to the preamplifier circuit 203 for acquiring a differential voltage signal from the preamplifier circuit 203 and performing the first filter amplification.
  • the first demodulation circuit 302 is connected to the first filter amplifying circuit 301, and is configured to obtain the differential voltage signal that has undergone the first filtering and amplification from the first filtering and amplifying circuit 301, and perform the first demodulation, in this embodiment.
  • the first demodulation circuit 302 uses a high-pass filter for filtering DC and low frequency signals in the differential voltage signal, such as noise signals due to signal drift or human breathing.
  • the second filter amplifying circuit 303 is connected to the first demodulating circuit 302 for obtaining the differential voltage signal that has undergone the first demodulation from the first demodulating circuit 302, and performing the second filtering and amplifying thereof.
  • the second demodulation circuit 304 is connected to the second filter amplifying circuit 303, and is configured to obtain a differential voltage signal amplified by the second filtering from the second filter amplifying circuit 303, perform second demodulation, and filter the power supply. The power frequency interference brought.
  • the low pass filter circuit 305 is connected to the second demodulation circuit 304 for obtaining the differential voltage signal after the second demodulation from the second demodulation circuit 304, performing low pass filtering processing on the differential voltage signal.
  • the carrier signal obtains status information of the detected object.
  • the DC amplifying circuit 306 is connected to the low-pass filter circuit 305 for acquiring state information of the detected object from the low-pass filter circuit 305, amplifying the output, and outputting it to the output module 105 for output by sound or visibility display. .
  • DC amplification of the status information can increase the signal strength and facilitate subsequent circuit processing.
  • the first filter amplifying circuit 301 and the second filter amplifying circuit 303 can increase the difference between the differential voltage signal and the noise signal, and improve the demodulation effects of the first demodulating circuit 302 and the second demodulating circuit 304.
  • the state information of the detected object output by the state recognition module 108 may be velocity waveform data indicating the moving speed of the measured portion and waveform data indicating the inclination and the twist of the measured portion, or may be directly the velocity value or indicating the inclination of the measured portion.
  • the value of the degree and the degree of twist, the output module 105 outputs the above waveform or value.
  • the state recognition module 108 may further include a state calculation and recognition module that performs an operation and/or identification based on the state information output by the post processing circuit 204 to determine the motion of the measured portion.
  • the state and/or the posture for example, the state recognition module 108 may further process the state information, and directly output information indicating that the object to be detected is stationary, slight motion, strenuous motion, etc. according to the magnitude of the motion speed of the measured portion, according to the measured portion
  • the direct output of the inclination and the twist indicates information such as standing, lying, lying on the object to be detected, and the sound output or text display is performed through the output module.
  • the observer can judge whether the corresponding blood pressure value is accurate by observing the blood pressure value output by the output module 105 and combining the state information indicating the motion posture of the detected object.
  • the blood pressure measuring instrument includes a pulse wave sensing device 501, a pulse wave transmitting device 502, a pulse wave acquiring module 503, a blood pressure calculating module 504, an output module 505, a state sensing device 500, and a state recognition module 508.
  • the state sensing device 500 is an attitude sensor 506 and/or a motion condition sensor 507.
  • the blood pressure measuring instrument provided in this embodiment is different from the above embodiment in that the state identifying module 508 is connected to the blood pressure calculating module 504, and the blood pressure calculating module 504 acquires the state information of the detected object from the state identifying module 508, and performs blood pressure according to the state information.
  • Monitoring processing for example, participating in the calculation of the blood pressure value, optimizing the calculation result of the blood pressure value, or optimizing the monitoring of the blood pressure value according to the state information of the detected object, for example, when the blood pressure value exceeds the alarm limit, according to the object to be detected.
  • the status information determines whether an alarm message is issued.
  • the blood pressure calculation module 504 detects that the pulse wave suddenly rises or falls, and can determine whether the motion speed of the detected object is greater than or equal to the first set value, and if so, If it is determined that the sudden increase or decrease is caused by external interference, the pulse wave measurement value having the interference is judged as an invalid value, or the pulse wave having the interference is optimized for the segment, for example, according to the pulse wave signal at the occurrence of the mutation
  • the adjacent pulse wave signal sample values correct the pulse wave signal at the sudden change, and the adjacent sample values may be several sample values before the mutation, or may be some sample values before and after the mutation, and then the corrected pulse wave is used.
  • the signal calculates the blood pressure value.
  • whether or not there is a sudden increase or decrease in the pulse wave can be determined based on the change in the slope of the pulse wave. It can also be judged according to the data values A and B of two consecutive sampling points.
  • is within the preset threshold range, it is determined that the pulse wave changes normally, when
  • exceeds the preset threshold range it is determined that the pulse wave suddenly rises or falls.
  • the blood pressure calculation module 504 detects that the pulse wave suddenly rises or falls, it is determined according to the state information whether the sudden increase or decrease is caused by interference. For example, the blood pressure calculation module 504 detects that the state information indicates that the measured part exists.
  • a large speed indicates that the object to be detected is in motion, and it can be judged that the sudden increase or decrease of the pulse wave is caused by external interference.
  • the blood pressure calculation module 504 can fit the abnormal pulse wave according to the condition of the previous several pulse waves, and replace it to achieve the purpose of correcting the pulse wave.
  • the pulse wave is simulated by a sine wave, and the pulse waves at 601 and 602 in the figure can be respectively expressed as follows.
  • Pulse wave at 601: W1 V1Sin ⁇ , where V1 is the amplitude.
  • Pulse wave at 602: W2 V2Sin ⁇ , where V2 is the amplitude.
  • V3 2V2.
  • the 603 pulse wave obtained by the above formula is theoretically obtained according to the pulse wave fitting at 601 and 602. In fact, when the pulse wave at 603 is detected as shown in Fig. 6, the pulse wave suddenly decreases due to the interference.
  • the blood pressure calculation module 504 performs a replacement correction on the pulse wave at 603 according to the above equation, as shown at 604 in FIG. At this point, the correction of the pulse wave with interference is completed.
  • the blood pressure calculation module 504 determines the posture information of the measured part from the state identification module 508. When it is determined that the blood pressure value continues to be lower than the second set value, it may be determined according to the posture information of the detected object. Generate an alarm signal. When the blood pressure value continues to be lower than the second set value and the detected object is in the lying posture, the detected object may be in a sleep state, and an alarm may not be performed. Or the blood pressure calculation module 504 determines whether the posture information of the detected object changes when the pulse wave signal is abruptly changed, and if so, changes the pulse wave signal of the detected pulse as an invalid signal, or according to the pulse wave at which the mutation occurs. The pulse wave signal of the sudden change of the pulse wave signal sample value is corrected, and the blood pressure value is calculated by using the corrected pulse wave signal.
  • the blood pressure measuring instrument provided in the embodiment can automatically correct the pulse wave with interference or optimize the processing of the result according to the motion or posture information of the detected object, thereby improving the accuracy of the blood pressure monitoring.
  • the measured part is usually the arm of the object to be detected, and the blood pressure measuring instrument further includes a sleeve that is placed on the arm or wrist of the object to be detected.
  • Some blood pressure measuring device sleeves are separated from the main unit, and the pulse wave sensing device and the state sensing device are installed at the sleeve end to facilitate sensing the state of the measured portion.
  • Some blood pressure measuring instrument sleeves are integrated with the main unit and are located at the measured position during the detection. In this case, the pulse wave transmitting device can be omitted, and the state sensing device can be installed on the host, directly with the state recognition module.
  • the communication is completed on the host, and can also be installed on the sleeve end, and communicates with the status recognition module installed on the host by establishing a communication link from the sleeve end to the host.
  • the communication link can be wired communication or wireless communication. the way.
  • the blood pressure measuring instrument can also measure blood pressure through other measured parts of the object to be detected, the measured part should not be construed as limiting the present application.

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Abstract

一种血压测量仪，包括：用于感应被检测对象的脉搏波，并输出脉搏波信号的脉搏波感应装置（101）;用于感应被监测对象所处的状态、并输出状态信息的状态感应装置（100）;主机（110），其包括信号处理电路（109）。信号处理电路（109）分别与脉搏波感应装置（101）和状态感应装置（100）相连，接收脉搏波感应装置（101）输出的脉搏波信号和状态感应装置（100）输出的状态信息，根据脉搏波信号计算血压值，并根据被检测对象的状态信息对血压进行监测处理。本血压测量仪根据被检测对象所处的状态信息对血压进行监测处理，从而保证获得的血压值更加准确可靠。

Description

一种血压测量仪 技术领域
本申请涉及医疗器械领域，具体涉及一种血压测量仪。
 背景技术
目前，无创血压测量通常是采用袖套冲压和示波法来检测无创血压。即在袖套内部安装一个脉搏波感应装置，感应到的脉搏波通过导气管传输到无创血压测量设备的主控部分。主控部分通过信号采集转换成数字信号，然后使用专业的算法计算出血压值。
但在这些传统的血压计测量血压过程中，都忽视了被测者手臂姿态和运动情况的检测。而在实际使用过程中，血压测量与被测者的手臂姿态和运动情况有很大的关系。当手臂摆动，平放或者自然下垂等不同情况下，测量的血压准确度和参考值都不一样。例如，在被测者睡眠状态下的血压值比清醒时要低，而这可以通过手臂的姿态是否平放来做初步判断。再例如，在被测者慢跑等运动情况下，由于运动造成的干扰，使得血压值经常测量不准或不可靠。而传统的血压计没有考虑这些场景，特别是医护人员不在现场的家用和长时间监护的情况，都是统一对待测量出来的血压值，因此按照这样测量出来的血压值来判断被测者是高血压还是低血压显然是不合理的。
 发明内容
本申请提供一种血压测量仪，在测量血压时同时能够检测被测部位的状态信息，以使在根据血压值进行判断时得到更多的参考信息。
根据本申请的第一方面，本申请提供了一种血压测量仪，包括：
脉搏波感应装置，用于感应被检测对象的脉搏波，并输出脉搏波信号。
状态感应装置，用于感应被检测对象所处的状态，并输出状态信息。
主机，所述主机包括信号处理电路，所述信号处理电路分别与脉搏波感应装置和状态感应装置相连，接收脉搏波感应装置输出的脉搏波信号和状态感应装置输出的状态信息，根据脉搏波信号计算血压值，根据被检测对象的状态信息对血压进行监测处理。
根据本申请的第二方面，本申请提供了另一种血压测量仪，包括：
脉搏波感应装置，用于感应被检测对象的脉搏波，并输出脉搏波信号。
状态感应装置，用于感应被检测对象所处的状态，并输出状态信息。
主机，所述主机包括信号处理电路和输出模块，所述信号处理电路分别与脉搏波感应装置和状态感应装置相连，用于接收脉搏波感应装置输出的脉搏波信号和状态感应装置输出的状态信息，根据脉搏波信号计算血压值，并输出血压值和状态信息；所述输出模块与信号处理电路相连，将信号处理电路输出的血压值和被检测对象的状态信息通过声音或可视性显示的方式输出。
本申请提供的血压测量仪，在得到血压值的同时，还通过状态感应装置感应被检测对象的状态信息，并根据被检测对象的状态信息对血压进行监测处理，以保证得到的血压值更加准确可靠。
附图说明
下面结合附图和具体实施方式作进一步详细的说明。
图1为本申请一种实施例的血压测量仪的模块示意图；
图2为本申请一种实施例中姿态传感器的原理示意图；
图3为本申请一种实施例中运动情况传感器的原理示意图；
图4为本申请一种实施例中状态识别模块的结构示意图；
图5为本申请另一种实施例的血压测量仪的模块示意图；
图6为本申请一种实施例中存在干扰信号的脉搏波示意图；
图7为图6中进行修正后的脉搏波示意图。
具体实施方式
实施例一
请参考图1，本实施例提供的血压测量仪包括脉搏波感应装置101、状态感应装置100和主机110，主机110包括信号处理电路109和输出模块105，信号处理电路109包括脉搏波采集模块103、血压计算模块104和状态识别模块108。
脉搏波感应装置101用于感应被检测对象的脉搏波，并输出脉搏波信号。脉搏波采集模块103与脉搏波感应装置101连接，在有些情况下，例如脉搏波采集模块103与脉搏波感应装置101距离较远时，脉搏波采集模块103与脉搏波感应装置101可通过有线或无线的方式连接，有线的方式可以是通过脉搏波传导装置102连接，脉搏波传导装置102具体可以是数据线，脉搏波传导装置102将脉搏波感应装置101输出的脉搏波信号传输到脉搏波采集模块103中。脉搏波采集模块103对脉搏波信号进行处理，例如放大、滤波和/或模数转换等。血压计算模块104与脉搏波采集模块103连接，用于对采集到的脉搏波进行算法处理，得到血压值。
本领域技术人员应当理解，脉搏波采集模块103为可选模块，当省去脉搏波采集模块103时，模数转换功能可设计在血压计算模块104中。
在具体实例中，血压测量仪可以采用示波法测量血压，对应的，脉搏波感应装置101为压力传感器；血压测量仪还可以采用柯氏音法测量血压，对应的脉搏波感应装置101为声音传感器。
状态感应装置100用于感应被检测对象所处的状态，并输出状态信息。状态识别模块108与状态感应装置100连接，用于从状态感应装置100中采集状态信息，并对状态信息进行处理。
输出模块105分别与血压计算模块104和状态识别模块108连接，输出血压计算模块104得出的血压值和状态识别模块108处理后的被检测对象的状态信息。输出模块105可以是声音播放模块，将血压值和被检测对象的状态信息通过声音的方式输出。输出模块105可以是显示模块，将血压值和被检测对象的状态信息以可视性信息的方式显示在显示屏上。
在一实施例中，状态感应装置100为用于设置在被检测对象的被测部位的姿态传感器106，用于感应被检测对象的姿态情况，并输出姿态情况信号作为状态信息。相应的，状态识别模块108与姿态传感器106连接，从姿态传感器106输出的姿态情况信号中进行采样，并根据姿态情况信号确定被检测对象的姿态。
在另一实施例中，状态感应装置100为用于设置在被检测对象的被测部位的运动情况传感器107，用于感应被测部位的运动情况，并输出运动情况信号作为被测部位的状态信息，例如加速度信息或速度信息。相应的，状态识别模块108与运动情况传感器107连接，用于从运动情况传感器107中采集运动情况信号，并根据运动情况信号确定被检测部位的运动状态，例如被测部位的运动速度，从而得知被检测对象是否处于运动状态。
优选的实施例中，状态感应装置可以同时包括姿态传感器106和运动情况传感器107，用于感应被检测对象的被测部位的姿态情况和运动情况，并输出姿态情况信号和运动情况信号。相应的，状态识别模块108分别与姿态传感器106和运动情况传感器107连接，用于从姿态传感器106和运动情况传感器107中采集姿态情况信号和运动情况信号，并根据姿态情况信号和运动情况信号确定出被检测对象姿态情况和运动情况。
在一具体实例中，姿态传感器106可以是陀螺仪或重力感应传感器。请参考图2，姿态传感器106为陀螺仪传感器时，可以输出被测部位运动时两个维度的信号，分别为倾斜度403和扭度404，通过这两个信号可以决定被测部位的姿态情况，参考平面401经过倾斜度403和扭度404旋转到当前姿态平面402，例如：当倾斜度403为90度，扭度404为0度时，被测部位的姿态情况（即当前姿态平面）为与Y轴、Z轴组成的平面平行；当倾斜度为0度，扭度为90度时，被测部位的姿态情况（即当前姿态平面）为与X轴、Z轴组成的平面平行。状态识别模块108可根据倾斜度和扭度，经过相应的算法确定出被测部位的姿态情况，并通过输出模块105输出。
运动情况传感器107可以是加速度传感器或速度传感器。请参考图3，运动情况传感器107为加速度传感器时，可以输出被测部位运动时三个维度的信号。分别为X轴、Y轴和Z轴的加速度信息。当物体当前时刻的速度为V，X轴、Y轴、Z轴的加速度信息分别为Gx、Gy、Gz时，在X方向上的实时速度Vx = V + GxΔt，其中Δt为预设的采样周期。通过上述算式进行累积即可得到X轴方向的各个时刻的运动速度，同理可以获得Y轴、Z轴的运动速度，从而获知被测部位的运动情况。因此，状态识别模块108可根据三维的加速度信息计算出被测部位的运动速度，并通过输出模块输出。
应当理解，当姿态传感器106为除陀螺仪传感器外的其它传感器，运动情况传感器107为除加速度传感器外的其它传感器时，其输出的信号将有所不同，但根据本申请的发明构思同样可以得到被测部位的状态信息。
请参考图4，在一种具体实例中，状态识别模块108具体实现对采集信号的放大和滤波处理，状态识别模块108包括载波电路201、闭环驱动电路202、前置放大电路203和后置处理电路204。载波电路201和闭环驱动电路202分别与状态感应装置100连接，用于对状态感应装置100输出的状态信息的信号进行调制。前置放大电路203与状态感应装置100连接，用于从状态感应装置100获取经载波电路201和闭环驱动电路202调制后的状态信息，将其根据预设的精度和增益转换成差分电压信号。后置处理电路204与前置放大电路203连接，用于从前置放大电路203中获取差分电压信号，对其进行解调，得到被检测对象所处状态的状态信息。
其中，后置处理电路204包括顺序连接的第一滤波放大电路301、第一解调电路302、第二滤波放大电路303、第二解调电路304、低通滤波电路305和直流放大电路306。第一滤波放大电路301与前置放大电路203连接，用于从前置放大电路203中获取差分电压信号，对其进行第一次滤波放大。第一解调电路302与第一滤波放大电路301连接，用于从第一滤波放大电路301中获取经过第一次滤波放大的差分电压信号，对其进行第一次解调，本实施例中，第一解调电路302使用高通滤波器，用于滤除差分电压信号中的直流和低频信号，如因信号漂移或人体呼吸等带来噪声信号。第二滤波放大电路303与第一解调电路302连接，用于从第一解调电路302中获取经过第一次解调的差分电压信号，对其进行第二次滤波放大。第二解调电路304与第二滤波放大电路303连接，用于从第二滤波放大电路303中获取经过第二次滤波放大的差分电压信号，对其进行第二次解调，滤除供电电源带来的工频干扰。低通滤波电路305与第二解调电路304连接，用于从第二解调电路304中获取经过第二次解调的差分电压信号，对其进行低通滤波处理，滤除差分电压信号中的载波信号，得到被检测对象的状态信息。直流放大电路306与低通滤波电路305连接，用于从低通滤波电路305中获取被检测对象的状态信息，对其进行放大处理并输出给输出模块105通过声音或可视性显示的方式输出。对状态信息进行直流放大可以增大信号强度，便于后续的电路处理。第一滤波放大电路301和第二滤波放大电路303可以增大差分电压信号与噪声信号之间的差距，提高第一解调电路302和第二解调电路304的解调效果。
状态识别模块108输出的被检测对象的状态信息可以是表示被测部位运动速度的速度波形数据和表示被测部位倾斜度和扭度的波形数据，也可以直接是速度值或表示被测部位倾斜度和扭度的数值，输出模块105对上述波形图或数值进行输出。
在另一实施例中，状态识别模块108还可以进一步包括状态计算和识别模块，状态计算和识别模块根据后置处理电路204输出的状态信息进行运算和/或识别，确定出被测部位的运动状态和/或姿态，例如，状态识别模块108还可以对上述状态信息进行处理，根据被测部位的运动速度大小直接输出表示被检测对象静止、轻微运动、剧烈运动等信息，根据被测部位的倾斜度和扭度直接输出表示被检测对象站立、平躺、侧躺等信息，并通过输出模块进行声音提示或文字显示。此时，观察人员通过观察输出模块105输出的血压值，再结合表示被检测对象运动姿态的状态信息即可判断相应的血压值是否准确。
实施例二
请参考图5，本实施例提供的血压测量仪包括脉搏波感应装置501、脉搏波传导装置502、脉搏波采集模块503、血压计算模块504、输出模块505、状态感应装置500和状态识别模块508，状态感应装置500为姿态传感器506和/或运动情况传感器507。
本实施例提供的血压测量仪与上述实施例的区别在于状态识别模块508与血压计算模块504连接，血压计算模块504从状态识别模块508中获取被检测对象的状态信息，根据状态信息对血压进行监测处理，例如参与血压值的计算，对血压值的计算结果进行优化，或根据被检测对象的状态信息，对血压值的监控进行优化，例如，当血压值超出报警限时，根据被检测对象的状态信息确定是否发出报警信息。例如，血压计算模块504检测到脉搏波存在突然升高或降低，可结合被检测对象的运动情况进行判断，即判断被检测对象的运动速度是否大于或等于第一设定值，如果是，可判断出该突然升高或降低为外部干扰导致，便将该存在干扰的脉搏波测量值判断为无效值，或者针对该段存在干扰的脉搏波进行优化处理，例如根据发生突变处的脉搏波信号临近的若干个脉搏波信号采样值修正发生突变处的脉搏波信号，临近的若干个采样值可以是突变之前的若干采样值，也可以是突变前后的若干采样值，然后采用修正后的脉搏波信号计算血压值。
在一具体实例中，可以根据脉搏波的斜率变化来判断脉搏波是否存在突然升高或降低。还可以根据连续的两个采样点的数据值A和B来判断，当|B|-|A|的值在预设阈值范围内时，判断为脉搏波的正常变化，当|B|-|A|的值超出预设阈值范围时，判断为脉搏波的突然升高或降低。当血压计算模块504检测到脉搏波存在突然升高或降低后，再根据状态信息判断该突然升高或降低是否因干扰导致，例如，血压计算模块504检测到状态信息中表示被测部位存在一个较大的速度，说明被检测对象处于运动状态，则可判断为脉搏波的突然升高或降低为外部干扰所致。此时，血压计算模块504可以根据前面几个脉搏波的情况来拟合该异常的脉搏波，对其进行替换，从而达到对脉搏波进行修正的目的。
请参考图6和图7，用正弦波来模拟脉搏波，图中601、602处的脉搏波可以分别表示如下。
601处的脉搏波：W1=V1Sinα，其中V1是幅值。
602处的脉搏波：W2=V2Sinα，其中V2是幅值。
由于血压测量过程中，袖套端是线性充气和线性放气的，因此，601、602、603处的脉搏波在幅值上存在线性关系，则V2-V1=V3-V2，即V3=2V2-V1，V3为603处脉搏波的幅值。故，
603处脉搏波：W3=V3Ssinα=(2V2-V1)Sinα。
上述式子得到的603处脉搏波为理论上根据601、602处脉搏波拟合得到的，实际上，当检测到603处脉搏波如图6所示时，即由于干扰导致脉搏波突然的降低，血压计算模块504则根据上述式子对603处脉搏波进行替换修正，如图7中604处所示。此时便完成了对存在干扰的脉搏波的修正。
应当理解，上述对脉搏波的修正方式只是为了阐释血压测量仪的一具体实例，在本申请发明构思的前提下，还可以存在其它不同的修正方式。
在另一具体实例中，血压计算模块504结合从状态识别模块508确定出被测部位的姿态信息，当判断血压值持续低于第二设定值时，可根据被检测对象的姿态信息判断是否产生报警信号。当血压值持续低于第二设定值并且被检测对象处于平躺姿态时，可能是被检测对象处于睡眠状态，可不进行报警。或者血压计算模块504在判断脉搏波信号发生突变时，即判断被检测对象的姿态信息是否发生变化，如果是，则将该突变出的脉搏波信号作为无效信号，或根据发生突变处的脉搏波信号的临近若干个脉搏波信号采样值修正发生突变处的脉搏波信号，采用修正后的脉搏波信号计算血压值。
本实施例提供的血压测量仪可以根据被检测对象运动或姿态信息自动对存在干扰的脉搏波进行修正或对结果的处理进行优化，提高了血压监控的准确性。
在实际应用中，被测部位通常是被检测对象的手臂，血压测量仪还包括套在被检测对象的手臂或手腕上的袖套。有些血压测量仪的袖套和主机分离，脉搏波感应装置和状态感应装置安装在袖套端，便于感应被测部位的状态。有些血压测量仪的袖套和主机集成在一起，在检测时都位于被测部位处，此种情况下，可省略脉搏波传导装置，状态感应装置可以安装在主机上，与状态识别模块直接在主机上完成通信，也可以安装在袖套端，通过建立一条从袖套端到主机的通信链路与安装在主机上的状态识别模块进行通信，该通信链路可以是有线通信方式或者无线通信方式。
另外，由于血压测量仪也可以通过被检测对象的其他被测部位测量血压，被测部位不应该理解为对本申请的限制。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换。

Claims (10)

  1. 一种血压测量仪, 其特征在于包括：
    脉搏波感应装置，用于感应被检测对象的脉搏波，并输出脉搏波信号；
    状态感应装置，用于感应被检测对象所处的状态，并输出状态信息；
    主机，所述主机包括信号处理电路，所述信号处理电路分别与脉搏波感应装置和状态感应装置相连，接收脉搏波感应装置输出的脉搏波信号和状态感应装置输出的状态信息，根据脉搏波信号计算血压值，根据被检测对象的状态信息对血压进行监测处理。
  2. 如权利要求1所述的血压测量仪，其特征在于，所述信号处理电路包括：
    状态识别模块，其与状态感应装置相连，对状态感应装置输出的状态信息进行处理；
    血压计算模块，其分别与脉搏波感应装置和状态识别模块相连，分别接收脉搏波感应装置输出的脉搏波信号和状态识别模块输出的处理后的被检测对象的状态信息，根据脉搏波信号计算血压值，并根据状态信息对血压值的计算或监控进行优化处理。
  3. 如权利要求2所述的血压测量仪，其特征在于，所述状态感应装置包括用于设置在被检测对象的被测部位的运动情况传感器，所述状态识别模块根据运动情况传感器输出的状态信息确定出被检测对象的运动速度，所述血压计算模块在判断脉搏波信号发生突变时，判断被检测对象的运动速度是否大于或等于第一设定值，如果是，则将该突变出的脉搏波信号作为无效信号，或根据发生突变处的脉搏波信号临近的多个脉搏波信号采样值修正发生突变处的脉搏波信号，采用修正后的脉搏波信号计算血压值。
  4. 如权利要求3所述的血压测量仪，其特征在于，所述运动情况传感器为加速度传感器，所述加速度传感器输出三维的加速度信息，所述状态识别模块根据三维的加速度信息计算出速度。
  5. 如权利要求2所述的血压测量仪，其特征在于，所述状态感应装置包括用于设置在被检测对象的被测部位的姿态传感器，所述状态识别模块根据姿态传感器输出的状态信息确定出被测部位的姿态信息，所述血压计算模块在判断血压值持续低于第二设定值时，根据被检测对象的姿态信息判断是否产生报警信号；或者血压计算模块在判断脉搏波信号发生突变时，即判断被检测对象的姿态信息是否发生变化，如果是，则将该突变出的脉搏波信号作为无效信号，或根据发生突变处的脉搏波信号临近的多个脉搏波信号采样值修正发生突变处的脉搏波信号，采用修正后的脉搏波信号计算血压值。
  6. 如权利要求5所述的血压测量仪，其特征在于，所述姿态传感器为陀螺仪，所述姿态传感器输出倾斜度和扭度，所述状态识别模块根据倾斜度和扭度确定出被测部位的姿态信息。
  7. 一种血压测量仪, 其特征在于包括：
    脉搏波感应装置，用于感应被检测对象的脉搏波，并输出脉搏波信号；
    状态感应装置，用于感应被检测对象所处的状态，并输出状态信息；
    主机，所述主机包括：
    信号处理电路，所述信号处理电路分别与脉搏波感应装置和状态感应装置相连，用于接收脉搏波感应装置输出的脉搏波信号和状态感应装置输出的状态信息，根据脉搏波信号计算血压值，并输出血压值和状态信息；和
    输出模块，其与信号处理电路相连，将信号处理电路输出的血压值和被检测对象的状态信息通过声音或可视性显示的方式输出。
  8. 如权利要求7所述的血压测量仪，其特征在于，所述信号处理电路包括：
    状态识别模块，其与状态感应装置相连，对状态感应装置输出的状态信息进行处理，并将处理后的状态信息输出至输出模块；
    血压计算模块，其与脉搏波感应装置相连，接收脉搏波感应装置输出的脉搏波信号，根据脉搏波信号计算血压值，并将血压值输出至输出模块。
  9. 如权利要求8所述的血压测量仪，其特征在于，所述状态感应装置包括用于设置在被检测对象的被测部位的运动情况传感器，所述运动情况传感器为加速度传感器，所述加速度传感器输出三维的加速度信息，所述状态识别模块根据三维的加速度信息计算出被测部位的速度；和/或
    所述状态感应装置包括用于设置在被检测对象的被测部位的姿态传感器，所述姿态传感器为陀螺仪或重力感应传感器，所述姿态传感器输出倾斜度和扭度，所述状态识别模块根据倾斜度和扭度确定出被测部位的姿态信息。
  10. 如权利要求1至9中任一项所述的血压测量仪，其特征在于，还包括用于套在被检测对象的手臂或手腕上的袖套，所述脉搏波感应装置和状态感应装置设置在袖套上，所述脉搏波感应装置与信号处理电路通过有线或无线的方式连接，所述状态感应装置与信号处理电路通过有线或无线的方式连接；或所述袖套与主机集成在一起，所述脉搏波感应装置设置在袖套上，所述状态感应装置设置在袖套或主机上。
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