WO2021218651A1 - 一种角度确定方法、装置和处理芯片 - Google Patents

一种角度确定方法、装置和处理芯片 Download PDF

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Publication number
WO2021218651A1
WO2021218651A1 PCT/CN2021/087581 CN2021087581W WO2021218651A1 WO 2021218651 A1 WO2021218651 A1 WO 2021218651A1 CN 2021087581 W CN2021087581 W CN 2021087581W WO 2021218651 A1 WO2021218651 A1 WO 2021218651A1
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WIPO (PCT)
Prior art keywords
blood pressure
acceleration
axis
pressure measurement
measurement device
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PCT/CN2021/087581
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English (en)
French (fr)
Inventor
邱兆鑫
周林峰
傅小煜
李靖
黄洁静
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华为技术有限公司
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Publication of WO2021218651A1 publication Critical patent/WO2021218651A1/zh

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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 pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
    • 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 pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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, mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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, mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114—Tracking parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/681—Wristwatch-type devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Definitions

  • This application relates to the technical field of blood pressure detection, and in particular to an angle determination method, device and processing chip.
  • Hypertension is the main risk factor for cardiovascular disease, so blood pressure measurement is a routine task in many medical examinations.
  • instruments commonly used to measure blood pressure on the market, one is an upper arm sphygmomanometer, and the other is a wristband sphygmomanometer.
  • the wristband sphygmomanometer is favored by users because of its lighter weight and convenience. Therefore, developers have made a miniaturized design for the wristband sphygmomanometer, which has evolved into a more applicable product. , Such as blood pressure watches, blood pressure bracelets and other wristband products, so as to facilitate users to measure blood pressure and provide convenience.
  • the developers are also developing the functions of the blood pressure monitor, such as adding night blood pressure measurement, blood pressure real-time tracking and monitoring, blood pressure feedback and other functions to improve the user experience.
  • the user When using a wristband sphygmomanometer to measure blood pressure, in order to measure an accurate blood pressure value, the user needs to be prompted to raise the wristband sphygmomanometer to a position that is level with the horizontal line of the heart. As shown in Figure 1, it is ensured that the blood pressure value of the user under test is consistent with the arterial blood pressure of the user's heart. At this time, the blood pressure value is the smallest and the measured blood pressure value is the most accurate. Therefore, for the wristband sphygmomanometer, the heart level detection It can assist users to measure more accurate blood pressure values.
  • the wristband sphygmomanometer integrates the user's wrist angle detection and upper arm length angle detection function, based on the measured user's forearm length and upper arm length, according to the measured user's forearm length and upper arm length and the horizontal line of the heart
  • the angle determines the relative height between the sphygmomanometer and the heart. Since the accelerometer in the sphygmomanometer measures acceleration according to the force, it only receives gravity when it is stationary, and the angle can be detected by the ratio of the gravity components received by the three-axis accelerometer in the x-axis, y-axis, and z-axis directions. However, during the action, the additional acceleration will produce additional components on the three axes. The calculation of the angle by the three acceleration components measured by the accelerometer is inaccurate, which leads to errors in the calculation of the relative height and ultimately to the blood pressure measurement results. There are errors.
  • the present application provides an angle determination method and device, which are used to compensate the angle error measured when the user's wrist is moving, so as to obtain an accurate blood pressure measurement result. Specifically, this application discloses the following technical solutions:
  • an embodiment of the present application provides an angle determination method, which is applied to a wristband-type blood pressure measurement device, wherein the method includes: obtaining the first angular velocity of the blood pressure measurement device reported by a three-axis gyroscope, The first angular velocity is the angular velocity when the blood pressure measurement device worn by the user moves from a first position to a second position, and the second position is closer to the user's heart than the first position; the first linear acceleration Including linear acceleration in the x-axis direction, y-axis direction, and z-axis direction.
  • the acceleration component in each axis direction corrects the second acceleration measured by the three-axis accelerometer to obtain the true acceleration in the three axis directions; and the first included angle is determined according to the true acceleration, and the first included angle is In the second position, the angle between the length of the forearm of the user wearing the blood pressure measurement device and the horizontal line of the user's heart.
  • the angle determination method provided in this embodiment obtains the acceleration components in the x-axis direction, the y-axis direction and the z-axis direction through the angular velocity measured by the three-axis gyroscope, and uses the acceleration component to compensate the non-uniform motion of the three-axis accelerometer
  • the external force interference in the process finally determines the true acceleration in the three-axis direction, thereby calculating the accurate first angle, and obtaining the accurate height difference through the first angle, thereby improving the accuracy of blood pressure measurement.
  • the first linear acceleration includes: linear acceleration in the x-axis direction of the blood pressure measurement device, linear acceleration in the y-axis direction, and z-axis
  • the linear acceleration in the direction; the obtaining the acceleration component in the direction of each of the three axes according to the first linear acceleration includes: determining that the blood pressure measurement device is on the x-axis, the y-axis according to a first relationship Axis and the acceleration component in the z-axis direction, the first relational expression is:
  • a x is the acceleration component of the blood pressure measurement device in the x-axis direction
  • a y is the acceleration component of the blood pressure measurement device in the y-axis direction
  • a z is the acceleration component of the blood pressure measurement device in the z-axis direction.
  • Acceleration component; a yz is the linear acceleration of the blood pressure measurement device on the plane composed of the y axis and the z axis, a xz is the linear acceleration of the blood pressure measurement device on the plane composed of the x axis and the z axis, and a xy is The linear acceleration of the blood pressure measuring device on the plane composed of the x-axis and the y-axis.
  • This implementation method first obtains the linear acceleration composite quantity on each plane, and then obtains the two acceleration components corresponding to each linear acceleration composite quantity through the difference operation, so as to pave the way for the subsequent compensation of the initial angular velocity.
  • the acceleration component in each axis direction is used to correct the second acceleration measured by the three-axis accelerometer to obtain the three-axis direction
  • the real acceleration includes: determining the real acceleration in the three axis directions according to the second relationship between the acceleration component in each axis direction and the second acceleration, and the second relationship is:
  • a′ x is the real acceleration of the blood pressure measuring device in the x-axis direction
  • a′ y is the real acceleration of the blood pressure measuring device in the y-axis direction
  • a′ z is the real acceleration of the blood pressure measuring device in the z-axis direction
  • the second accelerations of the blood pressure measurement device in the x-axis direction, the y-axis direction, and the z-axis direction are expressed as a x0 , a y0 , and a z0, respectively .
  • the second acceleration is compensated by the acceleration components in the three axis directions, thereby correcting the additional acceleration components output by the three-axis accelerometer during the movement, and finally obtaining the accurate first included angle, which is the subsequent height difference
  • the calculation and blood pressure measurement provide an accurate basis.
  • the method further includes: obtaining a height difference between a first height and a second height relative to the same reference plane, where the first height is The distance from the blood pressure measuring device to the reference surface when in the second position, where the second height is the distance from the user’s heart to the reference surface; to determine whether the height difference is within a preset range, if If yes, and the blood pressure measurement device is stationary at the first height for a preset period of time, the user's blood pressure value is measured under pressure.
  • the method before the obtaining the height difference between the first height and the second height relative to the same reference plane, the method further includes: An included angle and a first length determine the first height, and the first length is the length of the forearm of the user wearing the blood pressure measurement device.
  • the method further includes: if the height difference is outside the preset range, prompting the user to adjust the pressure of the blood pressure measurement device. ⁇ Said the first height.
  • the blood pressure measurement device includes a speaker; and the prompting the user to adjust the first height of the blood pressure measurement device includes: The corresponding relationship acquires the first musical scale corresponding to the height difference, the first corresponding relationship includes the corresponding relationship between at least one height difference and at least one musical scale, and each height difference corresponds to one musical scale; The speaker plays the first scale.
  • a speaker is set on the blood pressure measurement device, and the individual scales are played, and the display screen is used to jointly prompt the user to find the recommended height, so that the user can intuitively explore the accurate position of the measurement, improve the efficiency of accurately finding the position, and increase The fun of the operation.
  • the blood pressure measurement device includes an indicator light; and the prompting the user to adjust the first height of the blood pressure measurement device includes: A second correspondence relationship: acquiring a first color corresponding to the height difference, the second correspondence relationship including a correspondence relationship between at least one height difference and at least one color, and each height difference corresponds to a color; The indicator light is lit according to the first color.
  • the user adjusts the height of the blood pressure measuring device and is accompanied by the dynamic change of the indicator color, assisting the user to fine-tune the position so as to quickly find a suitable height, which improves the efficiency of finding the position.
  • setting screen display and screen color change assists the user in finding the standard position, so that the user can intuitively explore the accurate position of the measurement, which increases the interest of the operation.
  • the blood pressure measurement device includes an indicator light; and the prompting the user to adjust the first height of the blood pressure measurement device includes: A three correspondence relationship acquires a second color corresponding to the height difference and a first frequency corresponding to the second color, and the third correspondence relationship includes a correspondence relationship between at least one height difference and at least one color , And the frequency corresponding to each color; light the indicator light according to the first frequency and the second color.
  • the method before the obtaining the first angular velocity of the blood pressure measurement device reported by the three-axis gyroscope, the method further includes: obtaining the blood pressure measurement The measurement parameter generated when the position of the device changes; if the measurement parameter satisfies a preset condition, and the blood pressure measurement device is stationary at the third height for a preset period of time, the three-axis gyroscope and the three-axis acceleration are activated The measurement function of the meter; wherein the measurement parameters include: the linear acceleration of the blood pressure measurement device in the direction of each of the three axes, the amount of change in the linear acceleration, and the angular velocity, and the satisfaction of the preset conditions includes:
  • Condition 1 The linear acceleration in the z-axis direction of the blood pressure measurement device does not exceed the first threshold, and the amount of change in the linear acceleration does not exceed the second threshold; the linear acceleration in the x-axis or y-axis direction exceeds the third threshold, And the amount of change in linear acceleration exceeds the fourth threshold.
  • Condition 2 The current angular velocity of the blood pressure measurement device rotating around the z-axis exceeds the fifth threshold, and the angular velocity of the rotation around the x-axis or the y-axis does not exceed the sixth threshold.
  • the third threshold is greater than the first threshold
  • the fourth threshold is greater than the second threshold
  • the fifth threshold is greater than the sixth threshold
  • parameters such as acceleration and angular velocity are used to determine whether the user is willing to measure blood pressure, and when the willingness is determined, the angle calculation and height detection functions are activated to realize the automatic measurement function.
  • the method before the obtaining the first angular velocity of the blood pressure measurement device reported by the three-axis gyroscope, the method further includes: detecting whether a user is received Click the "start" button operation instruction on the dial of the blood pressure measurement device; if yes, start the measurement functions of the three-axis gyroscope and the three-axis accelerometer.
  • the present application also provides an angle determination device, which includes: an acquisition unit and a processing unit, and may also include a sending unit, a storage unit, and the like.
  • the obtaining unit is configured to obtain the first angular velocity of the blood pressure measurement device reported by the three-axis gyroscope, where the first angular velocity is the angular velocity when the blood pressure measurement device worn by the user moves from the first position to the second position , The second position is closer to the user's heart than the first position.
  • the processing unit is configured to obtain the first angular acceleration of the blood pressure measurement device according to the first angular velocity, obtain the first linear acceleration of the blood pressure measurement device according to the first angular acceleration, and obtain the first linear acceleration according to the first linear acceleration
  • the acceleration component in each axis direction of the three axes using the acceleration component in each axis direction to correct the second acceleration measured by the three-axis accelerometer to obtain the true acceleration in the three axis directions; and
  • the real acceleration determines the first angle.
  • the first included angle is the included angle between the arm of the user wearing the blood pressure measurement device and the horizontal line of the user's heart when in the second position.
  • the processing unit is specifically configured to determine that the blood pressure measurement device is in the x-axis, y-axis, and z-axis directions according to the first relational expression
  • the acceleration component on the above, the first relational expression is:
  • a x is the acceleration component of the blood pressure measurement device in the x-axis direction
  • a y is the acceleration component of the blood pressure measurement device in the y-axis direction
  • a z is the acceleration component of the blood pressure measurement device in the z-axis direction.
  • Acceleration component; a yz is the linear acceleration of the blood pressure measurement device on the plane composed of the y axis and the z axis, a xz is the linear acceleration of the blood pressure measurement device on the plane composed of the x axis and the z axis, and a xy is The linear acceleration of the blood pressure measuring device on the plane composed of the x-axis and the y-axis.
  • the processing unit is specifically configured to determine the acceleration component according to the second relationship between the acceleration component in each axis direction and the second acceleration.
  • the second relational expression is:
  • a′ x is the real acceleration of the blood pressure measuring device in the x-axis direction
  • a′ y is the real acceleration of the blood pressure measuring device in the y-axis direction
  • a′ z is the real acceleration of the blood pressure measuring device in the z-axis direction
  • the second accelerations of the blood pressure measurement device in the x-axis direction, the y-axis direction, and the z-axis direction are expressed as a x0 , a y0 , and a z0, respectively .
  • the processing unit is further configured to obtain the height difference between the first height and the second height relative to the same reference plane, and determine the height Whether the difference is within a preset range, if it is within the preset range and the blood pressure measuring device is stationary at the first height for a preset period of time, the user's blood pressure value is measured under pressure.
  • the first height is the distance from the blood pressure measurement device to the reference surface when in the second position
  • the second height is the distance from the user's heart to the reference surface.
  • the three-axis gyroscope is used to correct the output of the three-axis accelerometer to prevent the presence of other acceleration components in addition to the gravity acceleration when the three-axis accelerometer is only judged by the non-uniform linear motion.
  • the acceleration more accurately reflects the first included angle between the user's forearm and the user's heart horizontal line, thereby obtaining an accurate height difference, and improving the accuracy of blood pressure measurement.
  • the processing unit is further configured to determine the first height according to the first included angle and the first length, and the first length is The forearm of the user wearing the blood pressure measurement device is long.
  • the processing unit is further configured to prompt the user to adjust the blood pressure measurement device if the height difference is outside the preset range. The first height.
  • the blood pressure measurement device includes a speaker; the processing unit is specifically configured to obtain the first corresponding to the height difference according to the first correspondence relationship.
  • a musical scale playing the first musical scale through the speaker.
  • the first correspondence includes a correspondence between at least one height difference and at least one musical scale, and each of the height differences corresponds to one musical scale.
  • the blood pressure measurement device includes an indicator; the processing unit is specifically configured to obtain the first corresponding to the height difference according to the second correspondence relationship. One color, lighting the indicator light according to the first color.
  • the second correspondence includes a correspondence between at least one height difference and at least one color, and each height difference corresponds to one color.
  • the blood pressure measurement device includes an indicator light; the processing unit is specifically configured to obtain the first corresponding to the height difference according to the third correspondence relationship Two colors, and a first frequency corresponding to the second color, lighting the indicator light according to the first frequency and the second color.
  • the third correspondence includes a correspondence between at least one height difference and at least one color, and a frequency corresponding to each color.
  • the embodiment of the present application does not limit the connection relationship between components such as a speaker, an indicator light, and the blood pressure measurement device. There are also no restrictions on the physical form and structure of the speakers and indicator lights.
  • the acquiring unit is further configured to acquire measurement parameters generated when the position of the blood pressure measurement device changes.
  • the measurement parameters include the third height, the height difference between the third height and the second height, and the like.
  • the processing unit is further configured to detect that if the measurement parameters meet a preset condition, and the blood pressure measurement device is stationary at the third height for a preset period of time, then start the three-axis gyroscope and the three-axis accelerometer Measurement function.
  • the measurement parameters include: linear acceleration of the blood pressure measurement device in the direction of each of the three axes, the amount of change in linear acceleration, and angular velocity
  • the satisfaction of the preset condition includes: condition 1: the blood pressure measurement The linear acceleration of the device in the z-axis direction does not exceed the first threshold, and the amount of change in linear acceleration does not exceed the second threshold; the linear acceleration in the x-axis or y-axis direction exceeds the third threshold, and the amount of change in the linear acceleration exceeds Fourth threshold;
  • Condition 2 The angular velocity of the blood pressure measurement device currently rotating around the z-axis exceeds the fifth threshold, and the angular velocity of rotating around the x-axis or y-axis does not exceed the sixth threshold.
  • the third threshold is greater than the first threshold
  • the fourth threshold is greater than the second threshold
  • the fifth threshold is greater than the sixth threshold.
  • the processing unit is further configured to detect whether the user clicks the "start" button operation instruction on the dial of the blood pressure measurement device, if If yes, start the measurement functions of the three-axis gyroscope and the three-axis accelerometer.
  • the present application also provides a processing chip including a processor and a memory, wherein the processor is coupled to the memory, and the memory is used to store computer program instructions; the processor is used to execute the instructions stored in the memory to make
  • the processing chip executes the foregoing first aspect and the methods in various implementation manners of the first aspect.
  • the processing chip also includes an interface circuit, and the interface circuit is used to communicate with modules other than the processing chip.
  • this application also provides a terminal device.
  • the terminal device may be the blood pressure measurement device described in the foregoing second aspect, or may include the processing chip described in the foregoing third aspect, so as to be able to execute the foregoing first aspect and the first aspect.
  • the methods in various implementations.
  • the blood pressure measurement device includes a speaker, the speaker is connected to a processor, and the processor is configured to control the speaker to play the first corresponding to the height difference. scale.
  • the blood pressure measurement device includes an indicator light, the indicator light is connected to a processor, and the processor is configured to light up the Indicator light, the first color corresponds to the height difference.
  • the number of the indicator lights is one or more.
  • each indicator lamp can be illuminated in one or more colors.
  • the processor is further configured to light up the indicator light according to the first frequency and the second color, wherein the first frequency and the second color have a corresponding relationship, and the The second color has a corresponding relationship with the height difference.
  • the blood pressure measurement device includes a speaker and at least one indicator light
  • the processor is configured to determine the height difference and control the speaker to play The first scale corresponding to the height difference, and the indicator light is lit according to a first color, and the first color corresponds to the height difference.
  • the embodiments of the present application also provide a computer-readable storage medium that stores instructions in the storage medium, so that when the instructions run on a computer or a processor, they can be used to execute the first aspect and the first aspect described above. Methods in various implementations.
  • the embodiments of the present application also provide a computer program product.
  • the computer program product includes computer instructions. When the instructions are executed by a computer or a processor, the foregoing first aspect and various implementation manners of the first aspect can be implemented. method.
  • FIG. 1 is a schematic diagram of a wristband type blood pressure measurement device provided by this application.
  • FIG. 2a is a schematic diagram of a surface display screen of a blood pressure meter provided by an embodiment of the application;
  • 2b is a schematic diagram of the surface display screen of another blood pressure meter provided by an embodiment of the application.
  • 2c is a schematic diagram of a surface display screen of another sphygmomanometer provided by an embodiment of the application;
  • 2d is a schematic diagram of a surface display screen of another sphygmomanometer provided by an embodiment of the application;
  • FIG. 3 is a flowchart of a method for determining an angle provided by an embodiment of the application
  • FIG. 4 is a schematic diagram from a first perspective according to an embodiment of the application.
  • FIG. 5 is a flowchart of a blood pressure measurement method provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of a first included angle and a first height provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of a height difference between a first height and a second height according to an embodiment of the application.
  • FIG. 8a is a schematic diagram of using a second screen to prompt the height of a blood pressure measurement device according to an embodiment of the application.
  • FIG. 8b is a schematic diagram of using a musical scale to prompt the height of a blood pressure measurement device according to an embodiment of the application.
  • FIG. 8c is another schematic diagram of using a musical scale to prompt the height of a blood pressure measurement device according to an embodiment of the application.
  • FIG. 8d is another schematic diagram of using a musical scale to prompt the height of the blood pressure measurement device according to an embodiment of the application.
  • FIG. 9a is a schematic diagram of using the color of an indicator light to indicate the height of a blood pressure measurement device according to an embodiment of the application.
  • FIG. 9b is another schematic diagram of using the color of the indicator light to indicate the height of the blood pressure measurement device according to an embodiment of the application.
  • FIG. 9c is another schematic diagram of using the color of the indicator light to indicate the height of the blood pressure measurement device according to an embodiment of the application.
  • FIG. 10a is a schematic diagram of prompting the height of the blood pressure measurement device by using the color of the indicator light and the flashing frequency according to an embodiment of the application;
  • FIG. 10b is another schematic diagram of using the color of the indicator light and the flashing frequency to prompt the height of the blood pressure measurement device according to an embodiment of the application;
  • FIG. 10c is another schematic diagram of prompting the user to adjust the height of the blood pressure measurement device by using the color of the indicator light and the flashing frequency according to an embodiment of the application;
  • FIG. 11 is a schematic structural diagram of an angle determination device provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • the technical solution of the present application can be applied to a blood pressure measurement device, where the blood pressure measurement device is a wristband blood pressure measurement device, such as a wristband blood pressure meter, a wristband blood pressure meter, etc., in addition, it can also be a blood pressure watch Or a blood pressure bracelet, this embodiment does not limit the specific form of the blood pressure measurement device.
  • the blood pressure measurement device is a wristband blood pressure measurement device, such as a wristband blood pressure meter, a wristband blood pressure meter, etc.
  • it can also be a blood pressure watch Or a blood pressure bracelet, this embodiment does not limit the specific form of the blood pressure measurement device.
  • FIG. 2a it is a schematic diagram of a surface screen of a blood pressure watch provided by this embodiment.
  • the surface display screen includes a first screen and a second screen, where the first screen is used to display the user's blood pressure value, including systolic blood pressure (SBP) and diastolic blood pressure (DBP).
  • SBP systolic blood pressure
  • DBP diastolic blood pressure
  • the second screen is used to prompt the user whether the blood pressure measurement device after moving the arm is at the recommended height, wherein the position of the blood pressure measurement device worn by the user at the recommended height is the same as the hydraulic pressure received by the user's heart.
  • the blood pressure watch may include a speaker, which is used to play a musical scale, and then the musical scale is used to prompt whether the current height of the blood pressure watch is at the recommended height.
  • an indicator light may also be included, as shown in Fig. 2b, the indicator light may be lit in different colors to indicate the current height of the blood pressure watch.
  • the surface screen can display one indicator or multiple indicators, as shown in Figure 2c, including an indicator group composed of multiple indicators, which can light up one color at the same time, so that the surface screen brightness is sufficient Large, to avoid the user looking down at the surface screen.
  • a combination of a speaker and an indicator light may also be included.
  • a combined indication method of the speaker and the indicator light is used to prompt the user whether the blood pressure measurement device worn by the user is at the recommended height.
  • the above-mentioned blood pressure measurement device further includes a sensor module.
  • the sensor module includes at least one sensor, such as an optical sensor, a pressure sensor, a gyroscope sensor, an acceleration sensor, a touch sensor, and so on.
  • the optical sensor or pressure sensor is used to collect the pulse signal of the user's wrist, and obtain the user's blood pressure value according to the pulse signal.
  • the acceleration sensor is used to measure the acceleration of the blood pressure measurement device during exercise, such as periodically collecting the acceleration of the blood pressure measurement device according to a preset sampling frequency, wherein each acceleration includes the acceleration in the coordinate system of the acceleration sensor Acceleration in the directions of the x-axis, y-axis, and z-axis.
  • the gyro sensor is used to measure the angular velocity of the blood pressure measuring device during exercise.
  • the gyroscope sensor periodically collects the angular velocity of the blood pressure measurement device according to a preset sampling frequency, and each angular velocity also includes the x-axis, y-axis, and z-axis in the coordinate system of the gyroscope sensor.
  • the acceleration sensor is a three-axis accelerometer (accelerometer, ACC).
  • the gyroscope sensor is a three-axis gyroscope.
  • the blood pressure measurement device may also include other more or fewer components, such as a processor, a memory, and the like.
  • the blood pressure measurement device may include, but is not limited to, a wristband-type structure such as a watch and a bracelet, and the structure and form of the blood pressure measurement device are not limited in this embodiment.
  • this embodiment uses a three-axis gyroscope to dynamically correct the output acceleration of the three-axis accelerometer, and compensate the acceleration component generated by the movement of the blood pressure measurement device, thereby enhancing the user experience.
  • the technical solution provided by this embodiment will be described in detail below.
  • This embodiment provides an angle determination method, which is applied to a wristband type blood pressure measurement device, and the method is used to compensate the angle error generated when the blood pressure measurement device worn by the user moves from the first position to the second position .
  • the blood pressure measurement device can be worn on the left wrist of the user or on the right wrist, which is not limited in this embodiment.
  • the angle determination method includes:
  • the first included angle is the included angle between the forearm length of the user wearing the blood pressure measurement device and the horizontal line of the user's heart when in the second position.
  • the first included angle is ⁇ 1.
  • the length of the forearm is the linear distance from the point of the radius to the point of the styloid process of the radius.
  • the forearm length is L1.
  • the upper arm length is the straight line distance from the acromion point to the radius point.
  • step 101 includes:
  • 101-1 Obtain the first angular velocity of the blood pressure measurement device reported by the three-axis gyroscope.
  • the first angular velocity is the angular velocity when the blood pressure measurement device worn by the user moves from the first position to the second position, and the second position is closer to the user's heart than the first position.
  • the first position is the position when the user will raise his arm to measure blood pressure, for example, the first position is the position when the user raises the forearm (front arm) from both sides of the body.
  • the second position is a position where the user raises the forearm to the vicinity of the heart.
  • the three-axis gyroscope can be used to measure the first angular velocity of the blood pressure measuring device in the x-axis direction, the y-axis direction and the z-axis direction.
  • the three-axis gyroscope periodically collects the angular velocities according to the set sampling frequency; then these angular velocities are reported to the processor in the blood pressure measurement device.
  • the x-axis, y-axis, and z-axis are coordinate systems established by a three-axis gyroscope, and the coordinate system may be marked as the first coordinate system.
  • the first angular velocity collected by the three-axis gyroscope at any time is expressed in the x-axis, y-axis, and z-axis directions as ⁇ x0 , ⁇ y0 , and ⁇ z0 .
  • the first moment is any moment in the sampling period of the three-axis gyroscope when the user raises the arm from the first position to the second position.
  • the angular acceleration can be used to describe the magnitude and direction of the rigid body's angular velocity and the physical quantity of the rate of change with time, the unit is "radian/second squared".
  • the first angular acceleration is represented by the Greek letter “ ⁇ ”
  • the first angular acceleration in the x-axis, y-axis, and z-axis directions may be represented as ⁇ x, ⁇ y, and ⁇ z.
  • One way to obtain the first angular acceleration according to the first angular velocity is to perform a differential calculation on the first angular velocity ⁇ x0 , ⁇ y0 , ⁇ z0 to obtain the first angular acceleration ⁇ x corresponding to the first angular velocity, ⁇ y, ⁇ z.
  • linear acceleration can be used to describe the physical quantity of the rate of change of rigid body linear velocity and direction with respect to time, the unit is "meter per second square second".
  • the first linear acceleration is represented by the English letter "a”
  • the linear acceleration of the blood pressure measuring device on the plane composed of the y axis and the z axis is a yz
  • the blood pressure measuring device is on the x axis and z axis
  • the linear acceleration on the composed plane is a xz
  • the linear acceleration of the blood pressure measuring device on the plane composed of the x-axis and the y-axis is a xy .
  • the plane formed by any two of the x-axis, y-axis, and z-axis is perpendicular to the third axis outside of these two axes.
  • the plane formed by the x-axis and the y-axis is perpendicular to the z-axis.
  • One way of obtaining the first linear acceleration according to the first angular acceleration is to perform a differential operation on the first angular acceleration to obtain the first linear acceleration.
  • ⁇ is the first angular acceleration
  • a is the first linear acceleration
  • r is the radius of the circle
  • r is a constant.
  • the first linear acceleration a yz , a xz , and a xy are obtained through the first angular accelerations ⁇ x, ⁇ y, and ⁇ z in the three axis directions and the proportional relationship.
  • z-axis plane of the first linear acceleration line can be decomposed into a yz acceleration in the y-axis direction component of the linear acceleration on the z-axis direction A y A z component, i.e., Similarly, the parallel to the x-axis, z-axis acceleration of the first line in a xz plane can be resolved into linear accelerations on the x-axis direction component of the linear acceleration a x and the z-axis direction component A z, i.e.
  • y axis plane of the first linear acceleration line can be decomposed into a xy acceleration in the x-axis direction component of the linear acceleration a x and the y-axis direction component a y, i.e.,
  • the acceleration component is an additional acceleration component generated by the acceleration of the three axes during the movement of the blood pressure measurement device.
  • the blood pressure measurement device calculates the linear acceleration components a x , a y of the first linear acceleration of the blood pressure measurement device in the x-axis, y-axis, and z-axis directions according to the first relationship (1), a z .
  • the first relationship (1) is:
  • a x is the acceleration component of the blood pressure measurement device in the x-axis direction
  • a y is the acceleration component of the blood pressure measurement device in the y-axis direction
  • a z is the acceleration component of the blood pressure measurement device in the z-axis direction.
  • the second acceleration is the acceleration measured and reported by the three-axis acceleration in the blood pressure measuring device.
  • the three-axis accelerometer is in its own coordinate system, such as the second coordinate system, and the linear acceleration in the x-axis, y-axis, and z-axis directions collected in the second coordinate system at any time can be measured.
  • the second acceleration collected by the three-axis accelerometer can be expressed as a x0 , a y0 , and a z0 in the x-axis, y-axis, and z-axis directions.
  • the second linear acceleration in the x-axis direction measured by the three-axis accelerometer at the first time t1 is a x0 (t1)
  • the second linear acceleration in the x-axis direction measured at the second time t2 is a x0 (t2).
  • the second linear acceleration in the y-axis direction measured by the three-axis accelerometer at t1 and t2 is a y0 (t1) and a y0 (t2)
  • the second linear acceleration in the z-axis direction measured at t1 and t2 The two-line accelerations are a z0 (t1) and a z0 (t2).
  • the first coordinate system established by the three-axis gyroscope in the blood pressure measurement device is consistent with the second coordinate system of the three-axis accelerometer, that is, the two are the same coordinate system, or Have a unified correspondence. Therefore, at the same sampling time, the second relationship (2) between the acceleration components a x , a y , a z , and the corresponding second acceleration a x0 , a y0 , a z0 can be used to compare the first Second, the acceleration is compensated to obtain the true acceleration in each axis direction.
  • a′ x is the real acceleration of the blood pressure measuring device in the x-axis direction
  • a′ y is the real acceleration of the blood pressure measuring device in the y-axis direction
  • a′ z is the real acceleration of the blood pressure measuring device in the z-axis direction
  • the real accelerometers a′ x , a′ y , and a′ z are all linear accelerations.
  • the first diagram shown in FIG. 6 is a simplified diagram of the first included angle shown in FIG. Angle, the reference plane is parallel to the ground surface. Assuming that the positive direction of the x-axis is along the forearm and pointing to the radial styloid point, and the positive direction of the y-axis is along the upper arm and pointing to the radial point, the first angle ⁇ 1 is:
  • a′ x is the real acceleration of the blood pressure measuring device in the x-axis direction
  • a′ y is the real acceleration of the blood pressure measuring device in the y-axis direction.
  • the first length is the forearm length L1 of the user wearing the blood pressure measurement device
  • the forearm length is the linear distance from the radius point to the radius styloid process.
  • the first height is the distance from the blood pressure measurement device to the reference surface when the blood pressure measurement device worn by the user is in the second position.
  • the second position is when the user raises an arm to move the blood pressure measurement device to a position near the user's heart.
  • the reference plane can be any horizontal plane, for example, the reference plane is a plane where the user's forearm elbow joint (radius point) is located and parallel to the earth's surface.
  • the first height is expressed as h1, as shown in Fig. 4 or Fig. 6, it is determined that the first height h1 is,
  • h1 is the first height
  • L1 is the user's forearm length
  • ⁇ 1 is the first included angle
  • the forearm length L1 is a preset length, and the preset length may be an average value of the forearm length in a certain preset height interval.
  • the second height is the distance from the user's heart to the reference plane.
  • the second height is expressed as h2.
  • an implementation manner is to obtain the height of the user, and determine the second height according to the height of the user.
  • another embodiment is to obtain a second included angle, where the position of the blood pressure measurement device worn by the user is on the same horizontal line as the position of the user's heart, that is, the length of the forearm of the user when it is in the standard position. And the angle between the reference plane, and the second height is calculated as,
  • h2 is the second height
  • ⁇ 2 is the second included angle
  • the height difference is the height difference between the first height and the second height relative to the same reference plane.
  • the height difference is expressed as ⁇ h
  • the height difference ⁇ h is calculated according to the first height and the second height as
  • the blood pressure measurement device is stationary at the first height for a preset duration, for example, after the preset duration is 1-2s (seconds), the user is pressurized to measure Blood pressure value.
  • It also includes: if it is outside the preset range, that is, the height difference is greater than the preset height, prompting the user to adjust the first height of the blood pressure measurement device so that the adjusted height difference is within the preset range.
  • the user may be prompted to adjust the height of the blood pressure measurement device in the following various ways:
  • Manner 1 A speaker is provided in the blood pressure measurement device, and a scale is played through the speaker to prompt.
  • a first correspondence relationship between different height differences and different scales is established in advance to form a first correspondence relationship table, and the height difference ⁇ h between the first height and the second height is found in the first correspondence relationship.
  • the prompt scale such as the first scale, and then play the first scale.
  • the height difference is divided into 15 levels in the first correspondence table, corresponding to 15 scales, and each scale corresponds to a height difference, and the 15 scales include the bass do to the midrange do, and then from among them The sound do to the high pitch do, where the height difference corresponding to the midrange do is the preset height range.
  • the first correspondence includes the correspondence between height difference, scale, and vocal range, and each height difference corresponds to a musical scale.
  • the speaker of the blood pressure measuring device will emit different scales. For example, as shown in Figures 8b to 8d, the user adjusts the position of the blood pressure measurement device to the recommended height.
  • the blood pressure measurement device worn by the user's wrist is at the first height, the corresponding height difference is ⁇ h1.
  • the scale corresponding to the height difference ⁇ h1 is "bass mi", then "bass mi” is played, as shown in Figure 8b. At this time, remind the user to adjust the height of the forearm, or play the "position too low” indicator sound.
  • the played scale corresponding to the height difference ⁇ h2 measured by the blood pressure measuring device is "bass so", as shown in Figure 8c.
  • the user's current blood pressure measuring device height is not yet
  • the speaker will continue to play the scale or play the "position too low” prompt.
  • the user continues to adjust the height of the blood pressure measurement device until he hears that the scale played by the speaker is "Middo", as shown in Figure 8d, that is, when the corresponding height difference is ⁇ h3, it indicates that the user's current position has reached the recommended height.
  • the midrange do corresponds to the height difference within the preset height range.
  • the speaker emits a prompt sound of "start measurement”.
  • a speaker is provided on the blood pressure measurement device, and the individual scales are played, and the display screen is used to jointly prompt the user to find the recommended height, so that the user can intuitively explore the accurate position of the measurement, which improves the efficiency of accurately finding the position. Increase the fun of the operation.
  • the above-mentioned three-axis accelerometer and three-axis gyroscope both collect and report measurement parameters such as acceleration and angular velocity in real time, and then the blood pressure measurement device obtains the height difference between the first height and the second height in real time according to these measurement parameters. ⁇ h, and play the scale corresponding to the height difference ⁇ h, so as to achieve the effect of real-time detection and feedback, and improve the efficiency of users to find the recommended height.
  • Method 2 An indicator light is provided in the blood pressure measuring device, and the color of the indicator light is used to indicate.
  • a second correspondence relationship between different height differences and different colors is established in advance to form a second correspondence relationship table, as shown in Table 2, where each height difference corresponds to a color in the second correspondence relationship table
  • the height difference ⁇ h between the first height and the second height corresponds to the first color
  • the indicator light is lit according to the first color.
  • the number of indicator lights can be one or more.
  • the second correspondence table contains 7 levels of height differences, corresponding to 7 colors, each of which is different.
  • these 7 colors can be divided into 3 tones, which are cool, neutral, and warm.
  • the seven colors are sorted from warm to cold tones as follows: red, orange, yellow, green, cyan, blue, and purple. Among them, warm tones include three colors of red, orange, and yellow; neutral tones include one of green; and cool tones include three colors of cyan, blue, and purple.
  • the height difference ⁇ h is within the preset range
  • the color of the corresponding indicator light is green.
  • the height difference ⁇ h exceeds the preset range and is a negative larger value, that is, ⁇ h ⁇ 0
  • the warm-color indicator light is lit.
  • the cool-toned indicator light is lit.
  • a height adjustment process is shown in Figures 9a to 9c.
  • the control indicator lights up in red, prompting the user to raise arm. The user continues to adjust the arm.
  • the height difference is abbreviated to ⁇ h2
  • the color is determined to be yellow, and the control indicator light turns yellow, as shown in Figure 9b.
  • the speaker still prompts that the height is low, and the user continues to raise the arm height until the indicator light turns green, as shown in Figure 9c, which means that the blood pressure measurement device at the current height reaches the recommended height, and the speaker plays "Start measurement”
  • the prompt tone starts to pressurize and measure blood pressure.
  • the user adjusts the height of the blood pressure measurement device along with the dynamic change of the indicator color to assist the user in fine-tuning the position so as to quickly find a suitable height, which improves the efficiency of finding the position.
  • setting screen display and screen color change assists the user in finding the standard position, so that the user can intuitively explore the accurate position of the measurement, which increases the interest of the operation.
  • Method 3 There is an indicator light in the blood pressure measuring device, but the color of the indicator light is smaller than the height difference level, and the indicator light flashes to indicate.
  • a third correspondence relationship between different height differences and indicator lights of different colors is established in advance, such as a third correspondence relationship table, as shown in Table 3.
  • the height difference contains 7 levels. There are 3 kinds of colors that the indicator can light. If the number of colors is less than the level number of the height difference, the same color may correspond to two or more height differences. In order to distinguish the frequency of the indicator light, Flash faster and slower to assist identification.
  • the number of levels of height difference is 7.
  • green indicates that the height difference ⁇ h is within a preset range
  • yellow and blue indicate that the height difference ⁇ h is outside the preset range.
  • the flashing frequency of yellow and blue is set to establish the correspondence relationship between the 6 height differences and the two indicator lights. For example, there are three frequency flicker levels of 1 Hz, 1.5 Hz, and 2 Hz. If the height difference ⁇ h is greater, the indicator light flashes more frequently. Conversely, the smaller the height difference ⁇ h is, the smaller the indicator light flashes. When the height difference ⁇ h reaches the preset range, the indicator light is always on without flashing.
  • a height adjustment process is shown in Figures 10a to 10c.
  • the indicator light turns yellow and flashes at a frequency of 2 Hz, as shown in Figure 10a.
  • the indicator light is still yellow, but flashes at a frequency of 1 Hz, as shown in Figure 10b.
  • the user continues to adjust the height of the blood pressure measurement device.
  • the indicator light is green and is always on, as shown in Figure 10c, it means that the blood pressure measurement device worn by the user reaches the recommended height and can start pressure measurement.
  • the flashing frequency of the same color indicator is set to distinguish different levels of height difference, and with the dynamic change of the screen color, it assists the user to fine-tune the position and thereby Find a suitable height quickly.
  • the ease of use and simplicity of user operations are improved, and the user experience is improved.
  • the brightness range of the indicator can be a single point, or the entire dial can be illuminated, so as to more significantly remind the user. There is no limit to the brightness of the bright and the size of the displayed brightness.
  • this embodiment can also prompt the user to adjust the height of the blood pressure measurement device in other ways, such as the combination of an indicator light and a scale.
  • This embodiment implements other possible implementations of various combinations and evolutions of the above three methods. The method is not restricted.
  • the angle determination method provided in this embodiment obtains the acceleration components in the x-axis direction, the y-axis direction and the z-axis direction through the angular velocity measured by the three-axis gyroscope, and uses the acceleration component to compensate the non-uniform motion of the three-axis accelerometer
  • the external force interference in the process finally determines the true acceleration in the three-axis direction, thereby calculating the accurate first angle, and obtaining the accurate height difference through the first angle, thereby improving the accuracy of blood pressure measurement.
  • the algorithm is used to identify whether the blood pressure measurement device worn by the user is at the recommended measurement height, which can improve the dynamic performance of angle detection, so as to better determine the height relationship with the heart in real time. And when the height is not the standard height, the user is prompted to adjust the arm position, and the user interface (UI) feedback method allows the user to more intuitively find the recommended measurement height, which increases the interest of the operation.
  • UI user interface
  • the method further includes:
  • Step 100 Detect whether the user is willing to perform blood pressure detection, and if so, start the measurement functions of the three-axis gyroscope and three-axis accelerometer in the blood pressure measurement device, and start to collect and report measurement parameters. Specifically, it can be detected in the following two ways.
  • the first method is to detect whether the user clicks the "start” button operation instruction on the dial of the blood pressure measurement device.
  • the user clicks the "start” button operation instruction on the dial of the blood pressure measurement device Activate the blood pressure measurement function.
  • the second way Obtain the measurement parameters generated when the position of the blood pressure measurement device changes, and determine whether these measurement parameters meet the preset conditions. If the preset conditions are met, and the blood pressure measurement device is at the current altitude, such as the first When the three heights are stationary for a preset time period, the measurement functions of the three-axis gyroscope and the three-axis accelerometer are activated.
  • the preset conditions include:
  • Condition 1 The linear acceleration of the blood pressure measurement device in the z-axis direction does not exceed the first threshold, and the amount of change in the linear acceleration does not exceed the second threshold.
  • the linear acceleration in the x or y axis direction exceeds the third threshold, and the amount of change in the linear acceleration exceeds the fourth threshold.
  • Condition 2 The current angular velocity of the blood pressure measurement device rotating around the z-axis exceeds the fifth threshold, and the angular velocity of the rotation around the x- or y-axis does not exceed the sixth threshold.
  • the amount of change in the linear acceleration is represented by the change in the second acceleration from time t2 to time t1, and the second acceleration is linear acceleration, where the second time t2 is At the current moment, the first moment t1 is the previous moment.
  • the second linear acceleration in the z-axis direction of the blood pressure measuring device at time t2 is expressed as a z0 (t2)
  • the second linear acceleration in the x-axis direction of the blood pressure measuring device at time t2 is expressed as a x0 (t2)
  • the second linear acceleration in the y-axis direction of the blood pressure measuring device at time t2 is expressed as a y0 (t2)
  • a z0 (t1) is the second linear acceleration of the blood pressure measuring device in the z-axis direction at time t1
  • a x0 (t1) is the second linear acceleration of the blood pressure measuring device in the x-axis direction at time t1
  • a y0 (t1) is The second linear acceleration in the y-axis direction of the blood pressure measurement device at time t1.
  • ⁇ 1 is the first threshold
  • ⁇ 2 is the second threshold
  • ⁇ 3 is the third threshold
  • ⁇ 4 is the fourth threshold
  • the angular velocity of the blood pressure measurement device rotating around the x-axis, y-axis, or z-axis at the current moment is the first angular velocity ⁇ x0 , ⁇ y0 , ⁇ z0 , measured by the three-axis gyroscope in the foregoing embodiment, Hypothesis
  • the first angular velocity of the blood pressure measuring device rotating around the z axis at t2 is ⁇ z0 (t2)
  • the first angular velocity of the blood pressure measuring device rotating around the x-axis at t2 is ⁇ x0 (t2)
  • the first angular velocity of the blood pressure measuring device rotating around the y axis at t2 is ⁇ y0 (t2)
  • ⁇ 5 is the fifth threshold
  • ⁇ 6 is the sixth threshold
  • parameters such as acceleration and angular velocity are used to determine whether the user is willing to measure blood pressure, and when the willingness is determined, the angle calculation and height detection functions are activated, thereby realizing automatic blood pressure measurement.
  • the method further includes: if the above-mentioned measurement parameter does not satisfy at least one of the above-mentioned "condition 1" and "condition 2", not starting the automatic measurement function of the blood pressure measurement device.
  • FIG. 11 is a schematic structural diagram of an angle determination device provided by an embodiment of the application.
  • the device may be a blood pressure measurement device in the foregoing embodiment, or a component located in the blood pressure measurement device, such as a chip.
  • the device can realize all the functions of the blood pressure measurement device in the foregoing embodiment.
  • the apparatus may include: an acquiring unit 1101, a processing unit 1102.
  • the device may also include other units or modules such as a sending unit and a storage unit.
  • the obtaining unit 1101 is configured to obtain the first angular velocity of the blood pressure measurement device reported by the three-axis gyroscope, where the first angular velocity is when the blood pressure measurement device worn by the user moves from the first position to the second position Angular velocity, the second position is closer to the user's heart compared to the first position.
  • the processing unit 1102 is configured to obtain a first angular acceleration of the blood pressure measurement device according to the first angular velocity, obtain a first linear acceleration of the blood pressure measurement device according to the first angular acceleration, and obtain a first linear acceleration of the blood pressure measurement device according to the first angular acceleration.
  • the first included angle is determined according to the real acceleration.
  • the first included angle is the included angle between the arm of the user wearing the blood pressure measurement device and the horizontal line of the user's heart when in the second position.
  • the processing unit 1102 is specifically configured to determine that the blood pressure measurement device is on the x-axis, the y-axis, and the z-axis according to the first relational expression.
  • the acceleration component in the direction, the first relational expression is:
  • a x is the acceleration component of the blood pressure measurement device in the x-axis direction
  • a y is the acceleration component of the blood pressure measurement device in the y-axis direction
  • a z is the acceleration component of the blood pressure measurement device in the z-axis direction.
  • Acceleration component; a yz is the linear acceleration of the blood pressure measurement device on the plane composed of the y axis and the z axis, a xz is the linear acceleration of the blood pressure measurement device on the plane composed of the x axis and the z axis, and a xy is The linear acceleration of the blood pressure measuring device on the plane composed of the x-axis and the y-axis.
  • processing unit 1102 is specifically configured to determine the true acceleration in the three axis directions according to the second relationship between the acceleration component in each axis direction and the second acceleration, and the second relationship for:
  • a′ x is the real acceleration of the blood pressure measuring device in the x-axis direction
  • a′ y is the real acceleration of the blood pressure measuring device in the y-axis direction
  • a′ z is the real acceleration of the blood pressure measuring device in the z-axis direction
  • the second accelerations of the blood pressure measurement device in the x-axis direction, the y-axis direction, and the z-axis direction are expressed as a x0 , a y0 , and a z0, respectively .
  • the processing unit 1102 is further configured to obtain the height difference between the first height and the second height relative to the same reference surface, and determine the height difference Whether it is within a preset range, if it is within the preset range and the blood pressure measurement device is stationary at the first height for a preset period of time, the user's blood pressure value is measured under pressure.
  • the first height is the distance from the blood pressure measuring device to the reference surface when in the second position
  • the second height is the distance from the user's heart to the reference surface.
  • the processing unit 1102 is further configured to determine the first height according to the first included angle and the first length, and the first length is Long forearms for users with blood pressure measuring devices.
  • the processing unit 1102 is further configured to prompt the user to adjust all of the blood pressure measurement device if the height difference is outside the preset range. ⁇ Said the first height.
  • the blood pressure measurement device includes a speaker; the processing unit 1102 is specifically configured to obtain the first scale corresponding to the height difference according to the first correspondence relationship. , Playing the first scale through the speaker.
  • the first correspondence relationship includes a correspondence relationship between at least one height difference and at least one musical scale, and each of the height differences corresponds to one musical scale.
  • the blood pressure measurement device includes an indicator light; the processing unit 1102 is specifically configured to obtain the first corresponding to the height difference according to the second correspondence relationship. Color, lighting the indicator light according to the first color.
  • the second correspondence relationship includes a correspondence relationship between at least one height difference and at least one color, and each height difference corresponds to a color.
  • the blood pressure measurement device includes an indicator light; the processing unit 1102 is specifically configured to obtain the second corresponding to the height difference according to the third correspondence relationship.
  • the third correspondence relationship includes a correspondence relationship between at least one height difference and at least one color, and a frequency corresponding to each color.
  • the obtaining unit 1101 is further configured to obtain measurement parameters generated when the position of the blood pressure measurement device changes.
  • the processing unit 1102 is further configured to detect that if the measurement parameters meet the preset conditions and the blood pressure measurement device is stationary at the third height for a preset period of time, then start the three-axis gyroscope and the three-axis accelerometer Measurement function.
  • the measurement parameters include: the linear acceleration of the blood pressure measurement device in the direction of each of the three axes, the amount of change in the linear acceleration, and the angular velocity.
  • Said meeting the preset conditions includes: condition 1 and condition 2, further,
  • Condition 1 The linear acceleration in the z-axis direction of the blood pressure measurement device does not exceed the first threshold, and the amount of change in the linear acceleration does not exceed the second threshold; the linear acceleration in the x-axis or y-axis direction exceeds the third threshold, And the amount of change in linear acceleration exceeds the fourth threshold.
  • Condition 2 The current angular velocity of the blood pressure measurement device rotating around the z-axis exceeds the fifth threshold, and the angular velocity of the rotation around the x-axis or the y-axis does not exceed the sixth threshold.
  • the third threshold is greater than the first threshold
  • the fourth threshold is greater than the second threshold
  • the fifth threshold is greater than the sixth threshold
  • the processing unit 1102 is further configured to detect whether an instruction of the user to click the "start" button on the dial of the blood pressure measurement device is received, if yes, , The measurement functions of the three-axis gyroscope and the three-axis accelerometer are activated.
  • the blood pressure measurement device obtained in this embodiment obtains the acceleration components in the x-axis direction, the y-axis direction and the z-axis direction through the angular velocity measured by the three-axis gyroscope, and uses the acceleration component to compensate the non-uniform motion of the three-axis accelerometer
  • the external force interference in the process finally determines the true acceleration in the three-axis direction, thereby calculating the accurate first angle, and obtaining the accurate height difference through the first angle, thereby improving the accuracy of blood pressure measurement.
  • this embodiment also provides a terminal device, which can be used to implement the angle determination method and blood pressure measurement method in the foregoing embodiment.
  • the terminal device may be a blood pressure measurement device in the foregoing embodiment.
  • FIG. 12 shows a schematic structural diagram of a terminal device.
  • the terminal device may include a processor 110 and a memory 120.
  • it may also include a display screen 130, a sensor module 140, an audio module 150, an indicator light 160, a communication module 170, one or more interfaces 180, and so on.
  • the terminal device may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or arrange different components.
  • the structure illustrated in the embodiments of the present invention It does not constitute a specific limitation on the terminal device.
  • the display screen 130 includes a first screen 130A and a second screen 130B.
  • the first screen 130A is used to display the blood pressure value of the user, such as SBP and DBP.
  • the second screen 130B is used to prompt the user whether the blood pressure measuring device after moving the forearm is at the recommended height, that is, the current height difference level.
  • the sensor module 140 may include a pressure sensor 140A, a gyroscope sensor 140B, an acceleration sensor 140C, a catalyst sensor 140D, and a distance sensor 140E.
  • the sensor module 140 may also include a light sensor, a fingerprint sensor, a temperature sensor, and the like.
  • the pressure sensor 140A is used to sense the pressure signal, collect the pulse signal of the user's wrist, and send the pulse signal to the processor 110.
  • the gyro sensor 140B may be used to determine the motion posture of the terminal device, and obtain the angular velocity of the terminal device in the x-axis, y-axis, and z-axis directions.
  • the gyroscope sensor 140B is the three-axis gyroscope in the foregoing embodiment.
  • the acceleration sensor 140C can detect the magnitude of the acceleration of the terminal device in various directions (including the x-axis, the y-axis, and the z-axis). The magnitude and direction of gravity can be detected when the terminal device is stationary.
  • the acceleration sensor 140C is the three-axis accelerometer in the foregoing embodiment.
  • the touch sensor 140D is also called a “touch device”.
  • the touch sensor 140D may be disposed in the display screen 130, and the touch screen is composed of the touch sensor 140D and the display screen 130, which is also called a “touch screen”.
  • the touch sensor 140D is used to detect touch operations acting on or near it, for example, the user clicks the “start” button operation on the display 130.
  • the distance sensor 140E is used to measure distance, such as the first height and the second height.
  • the function of the above-mentioned pressure sensor 140A may also be realized by a light sensor.
  • the light sensor collects the pulse signal of the user's wrist in real time and sends the pulse signal to the processor 110.
  • the processor 110 may include one or more processing units, where different processing units may be independent devices or integrated in one or more processors. Further, the processor may be composed of an integrated circuit (Integrated Circuit, IC), for example, may be composed of a single packaged IC, or may be composed of connecting multiple packaged ICs with the same function or different functions. For example, the processor may only include a central processing unit (CPU), a digital signal processor (digital signal processor, DSP), and so on.
  • CPU central processing unit
  • DSP digital signal processor
  • the processor 110 is configured to obtain the measurement parameters reported by the sensor module 140, determine the first angle according to the measurement parameters, and determine the blood pressure value of the measured user according to the first angle, and display the blood pressure value on the first screen 130A.
  • the processor 110 is also used to detect whether the height difference is within a preset range, and when it is not within the preset range, prompt the user to adjust through at least one of the second screen 130B, the audio module 150, the indicator light 160, etc. The height of the terminal device.
  • the processor 110 may also be provided with a memory 120, and the memory 120 is used to store computer program instructions and data collected by the sensor module.
  • the memory 120 may be used to store computer executable program code, the executable program code including instructions.
  • the internal memory can include a program storage area and a data storage area.
  • the storage program area can store an operating system, at least one application program required by a function (such as a sound playback function, a voice prompt function, and an indicator light function).
  • the storage data area can store data acquired or used by the terminal device (such as acceleration component, real acceleration, altitude difference, blood pressure value), etc.
  • the memory 120 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash storage (UFS), and the like.
  • UFS universal flash storage
  • the processor 110 executes various functional applications and data processing by running instructions stored in an internal memory and/or instructions stored in a memory provided in the processor.
  • the terminal device may also include a communication module 170, which may include at least one antenna, a mobile communication module, a wireless communication module, a modem processor, and a baseband processor.
  • a communication module 170 may include at least one antenna, a mobile communication module, a wireless communication module, a modem processor, and a baseband processor.
  • antennas can be used to transmit and receive electromagnetic wave signals, and each antenna can be used to cover a single or multiple communication frequency bands. In addition, different antennas can also be reused to improve antenna utilization.
  • the mobile communication module includes modules with wireless communication functions such as 2G/3G/4G/5G. In addition, it may also include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc.
  • the wireless communication module can provide applications on terminal devices including wireless local area networks (WLAN), such as wireless fidelity (WiFi) networks, Bluetooth (bluetooth), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • WLAN wireless local area networks
  • WiFi wireless fidelity
  • Bluetooth blue
  • global navigation satellite system global navigation satellite system
  • FM frequency modulation
  • NFC near field communication
  • infrared technology infrared, IR
  • the interface 180 may be one or more interfaces included in the processor 110.
  • the one or more interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface.
  • I2C integrated circuit
  • I2S I2S interface
  • PCM pulse code modulation
  • USB universal serial bus
  • the terminal device may also include buttons, such as a power-on button, a volume button, and so on.
  • the terminal device when used as a blood pressure measurement device, the method steps shown in FIG. 3 and FIG. 5 in the foregoing embodiment can be implemented, and in the device shown in FIG. 11, the function of the obtaining unit 1101 is It may be implemented by components such as the communication module 170 and the sensor module 140; the functions to be implemented by the processing unit 1102 may be implemented by the processor 110; the functions of the storage unit may be implemented by the memory 120.
  • the terminal device shown in FIG. 12 is a wristband sphygmomanometer, a blood pressure bracelet or a blood pressure watch, etc.
  • An embodiment of the present application also provides a processing chip, the processing chip includes a processor and an interface circuit, wherein the interface circuit is coupled with the processor, and further includes a storage medium, and the processor can be used to execute storage in the storage medium.
  • the processor may be the processor 110 as shown in FIG. 12, and the storage medium may be the memory 120 as shown in FIG. 12.
  • an embodiment of the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps of the angle determination method and blood pressure measurement method provided in the present application when the program is executed.
  • the storage medium includes, but is not limited to, magnetic disks, optical disks, read only memory (ROM) or random access memory (RAM), etc.
  • all or part of it may be implemented by software, hardware, firmware or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions, such as pairing instructions and transmission instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the terms “first”, “second”, etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects.
  • the first device generally refers to any device in the shooting interface, not a special device. Refers to a certain device located in the shooting interface.
  • the terms “include” and “include” and any variations of them are intended to cover non-exclusive inclusion.

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Abstract

一种角度确定方法、装置和处理芯片，应用于一种腕带式血压测量装置，方法包括：获得三轴陀螺仪（140B）上报的血压测量装置的第一角速度（101-1），根据第一角速度获得血压测量装置的第一角加速度（101-2），根据第一角加速度获得第一线加速度（101-3），根据第一线加速度获得三轴中每个轴方向上的加速度分量（101-4）；并利用加速度分量对三轴加速度计（140C）测量的第二加速度进行修正，得到三个轴方向上的真实加速度（101-5）；根据真实加速度确定第一夹角（101-6），第一夹角为在第二位置时用户佩戴有血压测量装置的前臂长与用户心脏的水平线之间的夹角，并通过第一夹角得到准确的高度差，从而克服了运动过程中产生的加速度分量，提高了血压测量的准确性。

Description

一种角度确定方法、装置和处理芯片
本申请要求于2020年4月30日提交中国专利局、申请号为202010365014.9、发明名称为“一种角度确定方法、装置和处理芯片”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及血压检测技术领域，尤其是涉及一种角度确定方法、装置和处理芯片。
背景技术
高血压是心血管疾病的主要危险因素，因此血压测量是许多医学检查中的常规任务。目前，市面上常用的测量血压的仪器包括两种，一种是上臂式血压计，另一种是腕带式血压计。相比于上臂式血压计，腕带式血压计因其更轻巧、便捷而备受用户青睐，因此，开发人员对腕带式血压计进行小型化设计，使其演化成适用性更好的产品，比如血压手表、血压手环等腕带产品，从而方便用户测量血压提供便捷。此外，开发人员还对血压计的功能进行开发，比如增加夜间血压测量、血压实时跟踪监测、血压反馈等功能来提升用户体验。
在采用腕带式血压计测量血压时，为了测量出准确的血压值，需要提示用户将腕带式血压计抬高到与心脏水平线相齐平的位置。如图1所示，从而保证被测用户的血压值与用户心脏的动脉血压一致，此时血液压力值最小，测量的血压值最准确，因此对于腕带式血压计来说，心脏齐平检测可以辅助用户测量得到更准确的血压值。
目前，腕带式血压计集成了用户手腕角度检测和上臂长的角度检测的功能，以被测用户的前臂长和上臂长为基础，根据被测用户的前臂长和上臂长与心脏水平线之间的角度，确定血压计和心脏之间的相对高度。由于血压计中的加速度计根据受力来测量加速度，在静止的时候只受重力，可以通过三轴加速度计在x轴、y轴、z轴方向上所受重力分量之比来检测角度。但在动作过程中，额外的加速度会在三个轴上产生附加的分量，通过加速度计测量到的三个加速度分量来计算角度不准确，从而导致相对高度计算有误差，最终导致血压测量结果也存在误差。
发明内容
本申请提供了一种角度确定方法和装置，用于补偿用户手腕运动时测量的角度误差，从而得到精确的血压测量结果。具体地，本申请公开了以下技术方案：
第一方面，本申请实施例提供了一种角度确定方法，该方法应用于一种腕带式血压测量装置，其中方法包括：获得三轴陀螺仪上报的所述血压测量装置的第一角速度，所述第一角速度为用户佩戴的所述血压测量装置从第一位置移动至第二位置时的角速度，所述第二位置相比于所述第一位置靠近用户心脏；所述第一线加速度包括在x轴方向、y轴方向和z轴方向上的线加速度。
根据第一角速度获得血压测量装置的第一角加速度，根据第一角加速度获得所述血压 测量装置的第一线加速度，根据第一线加速度获得三轴中每个轴方向上的加速度分量，利用每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度；以及根据该真实加速度确定第一夹角，所述第一夹角为在所述第二位置时用户佩戴有所述血压测量装置的前臂长与用户心脏的水平线之间的夹角。
本实施例提供的角度确定方法，通过三轴陀螺仪测量的角速度，获得加速度在x轴方向、y轴方向和z轴方向的加速度分量，并利用该加速度分量补偿三轴加速度计在非匀速运动过程中的外力干扰，最终确定出三轴方向上的真实加速度，从而计算出准确第一夹角，并通过该第一夹角得到准确的高度差，从而提高了血压测量的准确性。
结合第一方面，在第一方面的一种可能的实现方式中，所述第一线加速度包括：所述血压测量装置在x轴方向上的线加速度，y轴方向上的线加速度和z轴方向上的线加速度；所述根据所述第一线加速度获得三轴中每个轴方向上的加速度分量，包括：根据第一关系式确定所述血压测量装置在所述x轴、所述y轴和所述z轴方向上的加速度分量，所述第一关系式为：
Figure PCTCN2021087581-appb-000001
其中，a x为血压测量装置在所述x轴方向上的加速度分量，a y为血压测量装置在所述y轴方向上的加速度分量，a z为血压测量装置在所述z轴方向上的加速度分量；a yz为所述血压测量装置在y轴和z轴组成的平面上的线加速度，a xz为所述血压测量装置在x轴和z轴组成的平面上的线加速度，a xy为所述血压测量装置在x轴和y轴组成的平面上的线加速度。
本实现方式，先获取每个平面上的线加速度合成量，然后再通过差分运算得到每个线加速度合成量所对应的两个加速度分量，从而为后续补偿初始角速度做铺垫。
结合第一方面，在第一方面的另一种可能的实现方式中，利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度，包括：根据所述每个轴方向上的加速度分量和所述第二加速度的第二关系式确定所述三个轴方向上的真实加速度，所述第二关系式为：
Figure PCTCN2021087581-appb-000002
其中，a′ x为血压测量装置在x轴方向上的真实加速度，a′ y为血压测量装置在y轴方向上的真实加速度，a′ z为血压测量装置在z轴方向上的真实加速度；所述血压测量装置在所述x轴方向、所述y轴方向和所述z轴方向上的所述第二加速度分别表示为a x0，a y0，a z0。
本实现方式，通过三个轴方向上的加速度分量来对第二加速度进行补偿，从而修正了运动过程中三轴加速度计输出额外的加速度分量，最终得到准确的第一夹角，为后续高度差的计算和血压值测量提供准确依据。
结合第一方面，在第一方面的又一种可能的实现方式中，该方法还包括：获取相对于同一参考面的第一高度和第二高度之间的高度差，所述第一高度为在所述第二位置时的所述血压测量装置到所述参考面的距离，所述第二高度为用户心脏到所述参考面的距离；判断所述高度差是否在预设范围内，如果是，且所述血压测量装置在所述第一高度静止达到预设时长，则加压测量用户的血压值。
结合第一方面，在第一方面的又一种可能的实现方式中，所述获取相对于同一参考面的第一高度和第二高度之间的高度差之前，方法还包括：根据所述第一夹角和第一长度确定所述第一高度，所述第一长度为佩戴有所述血压测量装置的用户前臂长。
结合第一方面，在第一方面的又一种可能的实现方式中，所述方法还包括：如果所述高度差在所述预设范围之外，则提示用户调整所述血压测量装置的所述第一高度。
结合第一方面，在第一方面的又一种可能的实现方式中，所述血压测量装置中包括扬声器；所述提示用户调整所述血压测量装置的所述第一高度，包括：根据第一对应关系获取与所述高度差对应的第一音阶，所述第一对应关系中包括至少一个高度差与至少一个音阶之间的对应关系，且每个所述高度差对应一个音阶；通过所述扬声器播放所述第一音阶。
本实现方式，在血压测量装置上设置扬声器，通过播放个的音阶，并利用显示屏幕联合地提示用户寻找推荐高度，便于用户可以直观地摸索测量的准确位置，提高了准确查找位置的效率，增加了操作的趣味性。
结合第一方面，在第一方面的又一种可能的实现方式中，所述血压测量装置中包括指示灯；所述提示用户调整所述血压测量装置的所述第一高度，包括：根据第二对应关系获取与所述高度差对应的第一颜色，所述第二对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，且每个所述高度差对应一种颜色；按照所述第一颜色点亮所述指示灯。
本实现方式，通过指示灯颜色的设置，用户调整血压测量装置高度并伴随着指示灯颜色的动态变化，辅助用户细调位置从而快速地寻找到适合高度，提高了查找位置的效率。
另外，设置屏幕显示和屏幕颜色变化结合辅助用户寻找标准位置，便于用户可以直观地摸索测量的准确位置，增加了操作的趣味性。
结合第一方面，在第一方面的又一种可能的实现方式中，所述血压测量装置中包括指示灯；所述提示用户调整所述血压测量装置的所述第一高度，包括：根据第三对应关系获取与所述高度差对应的第二颜色，和与所述第二颜色对应的第一频率，所述第三对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，以及每种颜色对应的频率；按照所述第一频率和所述第二颜色点亮所述指示灯。
本实现方式，通过设置同一颜色指示灯的闪烁频率，从而达到区分不同高度差等级的作用，并伴随着屏幕颜色的动态变化，辅助用户细调位置从而快速地寻找到适合高度。同时还提高了用户操作的易用性和简便性，提升了用户体验。
结合第一方面，在第一方面的又一种可能的实现方式中，所述获得三轴陀螺仪上报的所述血压测量装置的第一角速度之前，所述方法还包括：获取所述血压测量装置的位置变化时产生的测量参数；如果所述测量参数满足预设条件，且所述血压测量装置在第三高度静止达到预设时长，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能；其中，所述测量参数包括：所述血压测量装置在三个轴中每个轴方向上的线加速度，线加速的变化量和角速度，所述满足预设条件包括：
条件1：所述血压测量装置在z轴方向上的线加速度不超过第一阈值，且线加速度的变化量不超过第二阈值；在x轴或y轴方向上的线加速度超过第三阈值，且线加速度的变化量超过第四阈值。
条件2：所述血压测量装置当前绕z轴转动的角速度超过第五阈值，绕x轴或y轴转动的角速度不超过第六阈值。
并且，所述第三阈值大于所述第一阈值，所述第四阈值大于所述第二阈值，所述第五阈值大于所述第六阈值。
本实现方式中，通过加速度和角速度等参数判断用户是否有测量血压的意愿，并在确定有意愿时，启动角度计算和高度检测功能，实现自动测量功能。
结合第一方面，在第一方面的又一种可能的实现方式中，所述获得三轴陀螺仪上报的所述血压测量装置的第一角速度之前，所述方法还包括：检测是否接收到用户在所述血压测量装置的表盘上点击“启动”按键操作的指示；如果是，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
第二方面，本申请还提供了一种角度确定装置，该装置包括：获取单元和处理单元，此外还可以包括发送单元、存储单元等。
其中，获取单元，用于获得三轴陀螺仪上报的所述血压测量装置的第一角速度，所述第一角速度为用户佩戴的所述血压测量装置从第一位置移动至第二位置时的角速度，所述第二位置相比于所述第一位置靠近用户心脏。
处理单元，用于根据所述第一角速度获得所述血压测量装置的第一角加速度，根据所述第一角加速度获得所述血压测量装置的第一线加速度，根据所述第一线加速度获得三轴中每个轴方向上的加速度分量，利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度；以及根据所述真实加速度确定第一夹角。所述第一夹角为在所述第二位置时用户佩戴有所述血压测量装置的手臂与用户心脏的水平线之间的夹角。
结合第二方面，在第二方面的一种可能实现方式中，处理单元，具体用于根据第一关系式确定所述血压测量装置在所述x轴、所述y轴和所述z轴方向上的加速度分量，所述第一关系式为：
Figure PCTCN2021087581-appb-000003
其中，a x为血压测量装置在所述x轴方向上的加速度分量，a y为血压测量装置在所述y轴方向上的加速度分量，a z为血压测量装置在所述z轴方向上的加速度分量；a yz为所述血压测量装置在y轴和z轴组成的平面上的线加速度，a xz为所述血压测量装置在x轴和z轴组成的平面上的线加速度，a xy为所述血压测量装置在x轴和y轴组成的平面上的线加速度。
结合第二方面，在第二方面的另一种可能实现方式中，所述处理单元，具体用于根据所述每个轴方向上的加速度分量和所述第二加速度的第二关系式确定所述三个轴方向上的真实加速度，所述第二关系式为：
Figure PCTCN2021087581-appb-000004
其中，a′ x为血压测量装置在x轴方向上的真实加速度，a′ y为血压测量装置在y轴方向上的真实加速度，a′ z为血压测量装置在z轴方向上的真实加速度；所述血压测量装置在所述x轴方向、所述y轴方向和所述z轴方向上的所述第二加速度分别表示为a x0，a y0，a z0。
结合第二方面，在第二方面的又一种可能实现方式中，所述处理单元，还用于获取相对于同一参考面的第一高度和第二高度之间的高度差，判断所述高度差是否在预设范围内，如果在所述预设范围内，且所述血压测量装置在所述第一高度静止达到预设时长，则加压测量用户的血压值。所述第一高度为在所述第二位置时的所述血压测量装置到所述参考面的距离，所述第二高度为用户心脏到所述参考面的距离。
本实现方式中，通过三轴陀螺仪来修正三轴加速度计的输出，防止仅由三轴加速度计判断时处于非匀速直线运动时会存在除了重力加速度之外的其他加速度分量，修正后的真实加速度更准确地反映了用户前臂与用户心脏水平线之间的第一夹角，进而得到准确的高度差，提高了血压测量的准确度。
结合第二方面，在第二方面的又一种可能实现方式中，所述处理单元，还用于根据所述第一夹角和第一长度确定所述第一高度，所述第一长度为佩戴有所述血压测量装置的用户前臂长。
结合第二方面，在第二方面的又一种可能实现方式中，所述处理单元，还用于如果所述高度差在所述预设范围之外，则提示用户调整所述血压测量装置的所述第一高度。
结合第二方面，在第二方面的又一种可能实现方式中，所述血压测量装置中包括扬声器；所述处理单元，具体用于根据第一对应关系获取与所述高度差对应的第一音阶，通过所述扬声器播放所述第一音阶。所述第一对应关系中包括至少一个高度差与至少一个音阶之间的对应关系，且每个所述高度差对应一个音阶。
结合第二方面，在第二方面的又一种可能实现方式中，所述血压测量装置中包括指示灯；所述处理单元，具体用于根据第二对应关系获取与所述高度差对应的第一颜色，按照所述第一颜色点亮所述指示灯。所述第二对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，且每个所述高度差对应一种颜色。
结合第二方面，在第二方面的又一种可能实现方式中，所述血压测量装置中包括指示灯；所述处理单元，具体用于根据第三对应关系获取与所述高度差对应的第二颜色，和与所述第二颜色对应的第一频率，按照所述第一频率和所述第二颜色点亮所述指示灯。所述第三对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，以及每种颜色对应的频率。
需要说明的是，本申请实施例对扬声器、指示灯等部件与血压测量装置之间的连接关系不进行限定。对扬声器和指示灯的物理形态和结构也不做限制。
结合第二方面，在第二方面的又一种可能实现方式中，所述获取单元，还用于获取所述血压测量装置的位置变化时产生的测量参数。所述测量参数包括第三高度，第三高度与 所述第二高度之间的高度差等。所述处理单元，还用于检测如果所述测量参数满足预设条件，且所述血压测量装置在第三高度静止达到预设时长，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
其中，所述测量参数包括：所述血压测量装置在三个轴中每个轴方向上的线加速度，线加速的变化量和角速度，所述满足预设条件包括：条件1：所述血压测量装置在z轴方向上的线加速度不超过第一阈值，且线加速度的变化量不超过第二阈值；在x轴或y轴方向上的线加速度超过第三阈值，且线加速度的变化量超过第四阈值；条件2：所述血压测量装置当前绕z轴转动的角速度超过第五阈值，绕x轴或y轴转动的角速度不超过第六阈值。并且，所述第三阈值大于所述第一阈值，所述第四阈值大于所述第二阈值，所述第五阈值大于所述第六阈值。
结合第二方面，在第二方面的又一种可能实现方式中，所述处理单元，还用于检测是否接收到用户在所述血压测量装置的表盘上点击“启动”按键操作的指示，如果是，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
第三方面，本申请还提供了一种处理芯片，包括处理器和存储器，其中，处理器与存储器耦合，存储器用于存储计算机程序指令；处理器用于执行存储器中存储的所述指令，以使得所述处理芯片执行前述第一方面及第一方面各种实现方式中的方法。
此外，所述处理芯片中还包括接口电路，所述接口电路则用于与处理芯片之外的其它模块进行通信。
第四方面，本申请还提供一种终端设备，所述终端设备可以是前述第二方面所述血压测量装置，或者包含前述第三方面所述的处理芯片，以便能够执行前述第一方面及第一方面各种实现方式中的方法。
结合第四方面，在第四方面的一种可能实现方式中，所述血压测量装置中包括扬声器，所述扬声器与处理器相连，所述处理器用于控制所述扬声器播放高度差对应的第一音阶。
结合第四方面，在第四方面的另一种可能实现方式中，所述血压测量装置中包括指示灯，所述指示灯与处理器相连，所述处理器用于按照第一颜色点亮所述指示灯，所述第一颜色与所述高度差相对应。
其中，所述指示灯数量为一个或多个。可选的，在包含多个指示灯的情况下，每个指示灯可被点亮的颜色种类为一种或一种以上。
可选的，所述处理器还用于按照所述第一频率和所述第二颜色点亮所述指示灯，其中，所述第一频率和所述第二颜色具有对应关系，且所述第二颜色与所述高度差具有对应关系。
结合第四方面，在第四方面的又一种可能实现方式中，所述血压测量装置中包括扬声器和至少一个指示灯，所述处理器用于确定所述高度差，以及控制所述扬声器播放所述高度差对应的第一音阶，并且按照第一颜色点亮所述指示灯，所述第一颜色与所述高度差相对应。
需要说明的是，本方面的各种实现中，对所述扬声器和所述指示灯的结构形态不予限制，对所述扬声器和所述指示灯分别与处理器的连接关系也不做限制。
第五方面，本申请实施例还提供了一种计算机可读存储介质，该存储介质中存储有指令，使得当指令在计算机或处理器上运行时，可以用于执行前述第一方面以及第一方面各 种实现方式中的方法。
另外，本申请实施例还提供了一种计算机程序产品，该计算机程序产品包括计算机指令，当该指令被计算机或处理器执行时，可实现前述第一方面以及第一方面各种实现方式中的方法。
需要说明的是，上述第二方面至第五方面的各种实现方式的技术方案所对应的有益效果与前述第一方面以及第一方面的各种实现方式的有益效果相同，具体参见上述第一方面以及第一方面的各种实现方式中的有益效果描述，不再赘述。
附图说明
图1为本申请提供的一种腕带式血压测量装置的示意图；
图2a为本申请实施例提供的一种血压计的表面显示屏的示意图；
图2b为本申请实施例提供的另一种血压计的表面显示屏的示意图；
图2c为本申请实施例提供的又一种血压计的表面显示屏的示意图；
图2d为本申请实施例提供的又一种血压计的表面显示屏的示意图；
图3为本申请实施例提供的一种角度确定方法的流程图；
图4为本申请实施例提供的一种第一角度的示意图；
图5为本申请实施例提供的一种血压测量方法的流程图；
图6为本申请实施例提供的一种第一夹角与第一高度的示意图；
图7为本申请实施例提供的一种第一高度与第二高度的高度差的示意图；
图8a为本申请实施例提供的一种利用第二屏幕提示血压测量装置的高度的示意图；
图8b为本申请实施例提供的一种利用音阶提示血压测量装置的高度的示意图；
图8c为本申请实施例提供的另一种利用音阶提示血压测量装置的高度的示意图；
图8d为本申请实施例提供的又一种利用音阶提示血压测量装置的高度的示意图；
图9a为本申请实施例提供的一种利用指示灯颜色提示血压测量装置的高度的示意图；
图9b为本申请实施例提供的另一种利用指示灯颜色提示血压测量装置的高度的示意图；
图9c为本申请实施例提供的又一种利用指示灯颜色提示血压测量装置的高度的示意图；
图10a为本申请实施例提供的一种利用指示灯颜色和闪烁频率提示血压测量装置的高度的示意图；
图10b为本申请实施例提供的另一种利用指示灯颜色和闪烁频率提示血压测量装置的高度的示意图；
图10c为本申请实施例提供的又一种利用指示灯颜色和闪烁频率提示用户调整血压测量装置高度的示意图；
图11为本申请实施例提供的一种角度确定装置的结构示意图；
图12为本申请实施例提供的一种终端设备的结构示意图。
具体实施方式
为了使本技术领域的人员更好地理解本申请实施例中的技术方案，并使本申请实施例的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请实施例中的技术方案 作进一步详细的说明。
首先结合附图对本申请实施例的应用场景进行说明。
本申请的技术方案可应用于一种血压测量装置，其中，血压测量装置为腕带式血压测量装置，比如腕带式血压计、腕带式血压仪等，此外，还可以是一种血压手表或血压手环，本实施例对血压测量装置的具体形态不予限制。
本实施例以血压手表为例，如图2a所示，为本实施例提供的一种血压手表的表面屏幕的示意图。该表面显示屏中包括第一屏幕和第二屏幕，其中所述第一屏幕用于显示用户的血压值，包括收缩压(Systolic Blood Pressure，SBP)和舒张压(Diastolic Blood Pressure，DBP)。第二屏幕用于提示用户移动手臂后的血压测量装置是否位于推荐高度，其中，在推荐高度时用户佩戴的血压测量装置的位置与用户的心脏所受的液压相同。
此外，血压手表中可以包括扬声器，该扬声器用于播放音阶，进而通过音阶来提示当前血压手表的高度是否处于所述推荐高度上。
可选的，还可以包括指示灯，如图2b所示，该指示灯可以点亮不同的颜色，从而提示当前血压手表的高度。其中，表面屏幕可以显示一个指示灯或者多个指示灯，如图2c所示，包括多个指示灯组成的指示灯组，该指示灯组可以同时点亮一种颜色，从而使得表面屏幕亮度足够大，避免用户低头观看表面屏幕。
可选的，还可以包括扬声器和指示灯相结合，如图2d所示，通过扬声器和指示灯联合指示方式提示用户佩戴的血压测量装置是否位于推荐高度。
此外，上述血压测量装置中还包括传感器模块。所述传感器模块中包括至少一个传感器，比如光学传感器、压力传感器、陀螺仪传感器、加速度传感器、触摸传感器等。
其中，所述光学传感器或者压力传感器，用于采集用户手腕部位的脉搏信号，并根据脉搏信号获得用户的血压值。所述加速度传感器用于测量血压测量装置在运动过程中的加速度，比如按照预设采样频率周期性地采集血压测量装置的加速度，其中，每个所述加速度包括所述加速度传感器的坐标系中的x轴、y轴、z轴共三个轴方向上的加速度。所述陀螺仪传感器用于测量血压测量装置的在运动过程中的角速度。具体地，陀螺仪传感器按照预设采样频率周期性地采集血压测量装置的角速度，每个所述角速度也包括陀螺仪传感器的坐标系中的x轴、y轴、z轴三个方向。
可选的，所述加速度传感器为三轴加速度计(accelerometer，ACC)。
可选的，所述陀螺仪传感器为三轴陀螺仪。
应理解，所述血压测量装置中还可以包括其他更多或更少的部件，比如包括处理器、存储器等。并且，所述血压测量装置可以包括但不限于手表、手环等腕带式结构，本实施例对血压测量装置的结构和形态不予限制。
测量时，用户将佩戴的血压测量装置移动至与心脏高度齐平的高度时，由于在用户寻找测量位置的动态过程中，运动产生加速度，会使得通过三轴加速度计输出的三个轴的加速度产生额外的加速度分量，进而导致折算到角度时不准确，影响血压测量结果。
为了提高测量结果准确性，矫正角度误差，本实施例使用三轴陀螺仪来对三轴加速度计的输出加速度进行动态矫正，补偿血压测量装置运动产生的加速度分量，从而提升用户体验。下面对本实施例提供的技术方案进行详细说明。
本实施例提供的一种角度确定方法，该方法应用于一种腕带式血压测量装置，该方法 用于补偿用户所佩戴的血压测量装置从第一位置移动到第二位置时产生的角度误差。其中，血压测量装置可以佩戴在用户的左手手腕，也可以佩戴在右手手腕，本实施例对此不予限制。
参见图3，所述角度确定方法包括：
101：确定第一夹角。
其中，所述第一夹角为在第二位置时用户佩戴有血压测量装置的前臂长与用户心脏的水平线之间的夹角，如图4所示，所述第一夹角为θ1。此外，所述前臂长为从桡骨点至桡骨茎突点的直线距离。可选的，所述前臂长为L1。上臂长为从肩峰点至桡骨点的直线距离，所述上臂长为L2，假设用户的全臂长为L，则全臂长L＝上臂长L2+前臂长L1。
进一步地，如图5所示，步骤101包括：
101-1：获得三轴陀螺仪上报的血压测量装置的第一角速度。
所述第一角速度为用户佩戴的所述血压测量装置从第一位置移动至第二位置时的角速度，并且，第二位置相比于第一位置靠近用户心脏。所述第一位置为用户将要抬起手臂测量血压时的位置，比如第一位置为用户将前臂(前胳膊)从身体两侧抬起时的位置。所述第二位置为用户将前臂抬起至心脏附近的位置。
所述三轴陀螺仪可用于测量血压测量装置在x轴方向，y轴方向和z轴方向上的第一角速度，所述第一角速度为瞬时速度，即在用户将手臂从第一位置抬至第二位置过程中，三轴陀螺仪按照设置的采样频率周期性地采集的角速度；然后将这些角速度上报给血压测量装置中的处理器。其中，所述x轴，y轴和z轴为三轴陀螺仪建立的坐标系，该坐标系可标记为第一坐标系。
例如，三轴陀螺仪在任意时刻采集的所述第一角速度在x轴、y轴和z轴方向上的表示为ω x0，ω y0，ω z0。所述第一时刻为用户将手臂从第一位置抬至第二位置过程中三轴陀螺仪的采样周期中的任一时刻。
101-2：根据所述第一角速度获得所述血压测量装置的第一角加速度。
其中，角加速度可用于描述刚体角速度的大小和方向对时间变化率的物理量,单位是“弧度/秒平方”。可选的，所述第一角加速度用希腊字母“α”表示，则在x轴、y轴和z轴方向上的第一角加速度可以表示为αx，αy，αz。
一种根据所述第一角速度获得所述第一角加速度的方式是，对第一角速度ω x0，ω y0，ω z0做差分计算得到与该第一角速度对应的所述第一角加速度αx，αy，αz。
101-3：根据所述第一角加速度获得所述血压测量装置的第一线加速度。
其中，线加速度可用于描述刚体线速度的大小和方向对时间变化率的物理量,单位是“米每二次方秒”。可选的，所述第一线加速度用英文字母“a”表示，则所述血压测量装置在y轴和z轴组成的平面上的线加速度为a yz，血压测量装置在x轴和z轴组成的平面上的线加速度为a xz，血压测量装置在x轴和y轴组成的平面上的线加速度为a xy。其中，由x轴、y轴和z轴中任意两个轴所组成的平面与这两个轴之外的第三个轴垂直。比如，由x轴和y轴组成的平面与z轴垂直。
一种根据第一角加速度获得所述第一线加速度的方式是，对所述第一角加速度做微分运算得到所述第一线加速度。具体地，由于第一角加速度与第一线加速度成正比关系，所述正比关系为：a＝α×r。其中，α为第一角加速度，a为第一线加速度，r 为圆周半径，且r为常量。本实施例中，通过三个轴方向上的第一角加速度αx，αy，αz以及所述正比关系得到所述第一线加速度a yz，a xz，a xy。
其中，平行于y轴、z轴平面的第一线加速度a yz可以分解成y轴方向上的线加速度分量a y与z轴方向上的线加速度分量a z，即
Figure PCTCN2021087581-appb-000005
同理地，平行于x轴、z轴平面的第一线加速度a xz可以分解成x轴方向上的线加速度分量a x与z轴方向上的线加速度分量a z，即
Figure PCTCN2021087581-appb-000006
平行于x轴、y轴平面的第一线加速度a xy可以分解成x轴方向上的线加速度分量a x与y轴方向上的线加速度分量a y，即
Figure PCTCN2021087581-appb-000007
101-4：根据所述第一线加速度获得三轴中每个轴方向上的加速度分量。
所述加速度分量为血压测量装置在运动过程中三个轴的加速度产生的额外的加速度分量。一种实现方式是，血压测量装置根据第一关系式(1)计算出血压测量装置的第一线加速度在所述x轴、y轴和z轴方向上的线加速度分量a x，a y，a z。所述第一关系式(1)为：
Figure PCTCN2021087581-appb-000008
其中，a x为血压测量装置在x轴方向上的加速度分量，a y为血压测量装置在y轴方向上的加速度分量，a z为血压测量装置在z轴方向上的加速度分量。
101-5：利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度。
其中，所述第二加速度为血压测量装置中的三轴加速度测量并上报的加速度。具体地，三轴加速度计在其自己的坐标系中，比如第二坐标系，测量得到任意时刻在该第二坐标系下采集的x轴、y轴和z轴方向上的线加速度，可选的，所述三轴加速度计采集的第二加速度在x轴、y轴和z轴方向可以表示为a x0，a y0，a z0。
例如，三轴加速度计在第一时刻t1测量的x轴方向的第二线加速度为a x0(t1)，第二时刻t2测量的x轴方向上的第二线加速度为a x0(t2)。同理地，三轴加速度计在t1和t2时刻测量的y轴方向上的第二线加速度分别为a y0(t1)和a y0(t2)；在t1和t2时刻测量的z轴方向上的第二线加速度分别为a z0(t1)和a z0(t2)。
需要说明的是，本实施例中，设血压测量装置中的三轴陀螺仪所建立的第一坐标系，和三轴加速度计的第二坐标系一致，即两者是相同的坐标系，或者具有统一的对应关系。因此，在同一采样时刻，可以通过所述加速度分量a x，a y，a z，和对应的所述第二加速度a x0，a y0，a z0之间的第二关系式(2)对第二加速度做补偿，得到在每个轴方向上的真实加速度。
具体地，所述第二关系式(2)为
Figure PCTCN2021087581-appb-000009
其中，a′ x为血压测量装置在x轴方向上的真实加速度，a′ y为血压测量装置在y轴方向上的真实加速度，a′ z为血压测量装置在z轴方向上的真实加速度，并且，所述真实加速度表a′ x，a′ y，a′ z均为线加速度。
101-6：根据所述真实加速度确定第一夹角。
具体地，如图6所示的第一个图为图4所示的第一夹角的简易图，所述第一夹角θ1可以理解为桡骨点所在的参考面与前臂长之间的夹角，所述参考面与大地表面平行。设x轴的正方向为沿着前臂且指向桡骨茎突点的方向，y轴的正方向为沿着上臂且指向桡骨点的方向，则第一夹角θ1为：
Figure PCTCN2021087581-appb-000010
其中，a′ x为血压测量装置在x轴方向上的真实加速度，a′ y为血压测量装置在y轴方向上的真实加速度。
102：根据所述第一夹角和第一长度确定所述第一高度。
其中，第一长度为佩戴有所述血压测量装置的用户的前臂长L1，所述前臂长为从桡骨点至桡骨茎突点的直线距离。所述第一高度为用户佩戴的血压测量装置在第二位置时，该血压测量装置到参考面的距离。所述第二位置为用户抬起手臂将所述血压测量装置移动至用户心脏附近的位置。其中，所述参考面可以是任一水平面，比如，所述参考面为用户小臂肘关节(桡骨点)所在的且与大地表面相平行的面。
若第一高度表示为h1，如图4或图6所示，则确定所述第一高度h1为，
h1＝L1×sinθ1    (4)
其中，h1为第一高度，L1为用户前臂长，θ1为第一夹角。
所述前臂长度L1为预设长度，该预设长度可以是某一预设身高区间的前臂长的平均值。
103：获取第二高度。所述第二高度为用户心脏到所述参考面之间的距离。
可选的，如图7所示，所述第二高度表示为h2。
示例性的，一种实施方式是，获取用户的身高，根据用户的身高确定第二高度。其中用户身高与心脏位置之间具有一定对应关系，利用该对应关系可以确定用户心脏相对于参考面的第二高度，所述第二高度与用户心脏位置等高。
此外，另一种实施方式是，获取第二夹角，所述第二夹角为用户佩戴的血压测量装置位置与所述用户心脏位置在同一水平线上，即位于标准位置时，用户的前臂长度与参考面之间的夹角，且计算所述第二高度为，
h2＝L1×sinθ2  (5)
其中，h2为所述第二高度，θ2为所述第二夹角。
104：获得所述第一高度与所述第二高度的高度差。所述高度差是第一高度和第二高度相对于同一参考面的高度差。
其中，所述高度差表示为△h，根据第一高度和第二高度计算所述高度差△h为
Δh＝h1-h2＝L×sinθ1-L×sinθ2   (6)
105：判断所述高度差是否在预设范围内。
106：如果是，即所述高度差小于等于预设高度，且血压测量装置在所述第一高度静 止达到预设时长，比如预设时长为1-2s(秒)后，则加压测量用户的血压值。
还包括：如果在所述预设范围之外，即所述高度差大于预设高度，则提示用户调整血压测量装置的所述第一高度，使得调整后的高度差在预设范围内。
具体地，如图8a所示，可通过以下各种方式来提示用户调整所述血压测量装置的高度：
方式一：血压测量装置中设置有扬声器，通过所述扬声器播放音阶来提示。
具体地，预先建立不同高度差与不同音阶之间的第一对应关系，形成第一对应关系表，在该第一对应关系中找到第一高度和第二高度之间的高度差△h所对应的提示音阶，比如第一音阶，然后播放该第一音阶。
示例性的，所述第一对应关系表中将高度差划分为15个等级，对应15个音阶，每个音阶对应一个高度差，所述15个音阶包括从低音do到中音do，再从中音do到高音do，其中中音do所对应的高度差为预设高度范围。如表1所示，第一对应关系中包含高度差，音阶，以及音域三者之间的对应关系，且每个高度差对应一个音阶。
表1
Figure PCTCN2021087581-appb-000011
用户在活动手臂过程中，血压测量装置的扬声器会发出不同的音阶。比如，如图8b至图8d所示，为用户将血压测量装置的位置调整到推荐高度的过程，其中用户手腕佩戴的血压测量装置位于第一高度时，对应的高度差为△h1，如果该高度差△h1所对应的音阶为“低音mi”，则播放“低音mi”,如图8b所示，。此时，提醒用户调整前臂高度，或者播放“位置过低”的指示音。
当用户调整到一个新的高度后，此时血压测量装置测量的高度差△h2所对应的播放的音阶为“低音so”，如图8c所示，此时用户当前的血压测量装置高度还未达到推荐高度，则扬声器继续播放音阶，或者播放“位置过低”提示音。用户继续调整血压测量装置的高度，直到听到扬声器播放的音阶为“中音do”时，如图8d所示，即对应高度差为△h3时，指示用户当前位置已经达到推荐高度。其中，中音do对应所述高度差在预设高度范围内，此时，扬声器发出“开始测量”的提示音。
本实施方式中，在血压测量装置上设置扬声器，通过播放个的音阶，并利用显示屏幕联合地提示用户寻找推荐高度，便于用户可以直观地摸索测量的准确位置，提高了准确查找位置的效率，增加了操作的趣味性。
需要说明的是，上述三轴加速度计和三轴陀螺仪均实时采集和上报加速度、角速度等测量参数，然后血压测量装置根据这些测量参数实时地获取第一高度与第二高度之间的高度差△h，并对应播放高度差△h所对应的音阶，从而达到实时检测和反馈的效果，提高了用户查找到推荐高度的效率。
方式二：血压测量装置中设置有指示灯，并通过指示灯点亮的颜色来提示。
具体地，预先建立不同高度差与不同种颜色之间的第二对应关系，形成第二对应关系表，如表2所示，在该第二对应关系表每个所述高度差对应一种颜色，比如第一高度与第 二高度之间的高度差△h对应第一颜色，然后按照第一颜色点亮所述指示灯。
其中，指示灯的个数可以是一个或多个。
表2
Figure PCTCN2021087581-appb-000012
比如如表2所示，第二对应关系表中包含7个等级的高度差，对应7种颜色，每种颜色各不相同。此外，还可以将这7种颜色划分为3种色调，分别是冷色调、中性色调、暖色调。所述7种颜色按照从暖色调到冷色调的顺序排序为：红、橙、黄、绿、青、蓝、紫。其中，暖色调包括红、橙、黄三种颜色；中性色调包括绿色一种；冷色调包括青、蓝、紫三种颜色。当高度差△h在预设范围内，对应指示灯的颜色为绿色。当高度差△h超过预设范围，为负数较大值时，即△h＜0，点亮暖色调的指示灯。当高度差△h超过预设范围，为正数较大值时，即△h＞0，点亮冷色调的指示灯。
示例性的，一次高度调整过程如图9a至9c所示，当高度差△h1较大时，表示血压测量装置的高度过低，如图9a所示，则控制指示灯亮红色，提示用户抬高手臂。用户继续调整手臂当高度差缩写至△h2时，根据第二对应关系表，确定颜色为黄色，则控制指示灯亮黄色，如图9b所示。此时，扬声器仍提示高度低，则用户继续抬高手臂高度，直到指示灯颜色变为绿色时，如图9c所示，表示当前高度下的血压测量装置达到推荐高度，扬声器播放“开始测量”的提示音，开始加压测量血压。
本实施方式中，通过指示灯颜色的设置，用户调整血压测量装置高度并伴随着指示灯颜色的动态变化，辅助用户细调位置从而快速地寻找到适合高度，提高了查找位置的效率。
另外，设置屏幕显示和屏幕颜色变化结合辅助用户寻找标准位置，便于用户可以直观地摸索测量的准确位置，增加了操作的趣味性。
方式三：血压测量装置中设置有指示灯，但是指示灯的颜色种类小于高度差等级，需要通过指示灯颜色闪烁来提示。
具体地，预先建立不同高度差与不同颜色指示灯之间的第三对应关系，比如第三对应关系表，如表3所示。高度差包含7个等级，指示灯可亮的颜色种类为3种，小于高度差的等级数，则同一种颜色可能对应两个或两个以上的高度差，为了区分可通过设置指示灯的频闪快慢来辅助识别。
表3
Figure PCTCN2021087581-appb-000013
表3的第三对应关系表中，所包含的指示灯颜色种类为3种，分别是黄、绿和蓝。高度差的等级数为7个。其中，绿色表示高度差△h在预设范围内，黄色和蓝色表示所述高度差△h在预设范围之外。为了建立3种颜色与7个高度差等级之间的对应关系，设置黄色和蓝色的闪烁频率来建立6个高度差与两个指示灯之间的对应关系。例如包括1Hz、 1.5Hz、2Hz共三个频率闪烁等级。若高度差△h越大，则指示灯闪烁频率越大。反之，高度差△h越小，指示灯闪烁频率越小，当高度差△h达到预设范围时，指示灯常亮，不闪烁。
示例性的，一次高度调整过程如图10a至10c所示，当检测到高度差为△h1时，指示灯呈黄色，并以2Hz频率闪烁，如图10a所示。当用户调整血压测量装置的高度使得高度差缩小为△h2时，指示灯仍然呈黄色，但是以1Hz频率闪烁，如图10b所示。用户继续调整血压测量装置的高度，当指示灯呈绿色，且常亮时，如图10c所示，表示用户佩戴的血压测量装置达到推荐高度，可以开始加压测量血压。
本实施方式中，在有限种颜色的指示灯情况下，通过设置同一颜色指示灯的闪烁频率，从而达到区分不同高度差等级的作用，并伴随着屏幕颜色的动态变化，辅助用户细调位置从而快速地寻找到适合高度。同时还提高了用户操作的易用性和简便性，提升了用户体验。
需要说明的是，在上述通过指示灯亮度来指示的过程中，所述指示灯的亮度范围可以是一个点，也可以点亮整个表盘，从而更显著地提示用户，本实施例对指示灯点亮的亮度和呈现的亮度大小不予限制。
应理解，本实施例还可以通过其他方式来提示用户调整血压测量装置的高度，比如通过指示灯与音阶结合的方式提示，本实施例对上述三种方式的各种组合和演进的其他可能实施方式不进行限制。
本实施例提供的角度确定方法，通过三轴陀螺仪测量的角速度，获得加速度在x轴方向、y轴方向和z轴方向的加速度分量，并利用该加速度分量补偿三轴加速度计在非匀速运动过程中的外力干扰，最终确定出三轴方向上的真实加速度，从而计算出准确第一夹角，并通过该第一夹角得到准确的高度差，从而提高了血压测量的准确性。
另外，通过算法识别用户佩戴的血压测量装置是否处于推荐测量高度，能够提高角度检测的动态性能，从而更好地实时判断与心脏的高度关系。并且在不是标准高度情况下提示用户调整手臂位置，并通过用户界面(user interface，UI)反馈的方式让用户更直观地寻找到推荐的测量高度，增加了操作的趣味性。
此外，在上述步骤101之前，方法还包括：
步骤100：检测用户是否有意愿做血压检测，如果是，则启动所述血压测量装置中的三轴陀螺仪和三轴加速度计的测量功能，开始采集和上报测量参数。具体地，可以通过以下两种方式来检测。
第一种方式：检测是否接收到用户在所述血压测量装置的表盘上点击“启动”按键操作的指示，当检测到用户在血压测量装置的表盘上点击“启动”按键操作的指示信号时，启动血压测量功能。
第二种方式：获取所述血压测量装置的位置变化时产生的测量参数，判断这些测量参数是否满足预设条件，如果满足所述预设条件，且所述血压测量装置在当前高度，比如第三高度静止达到预设时长，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
具体地，所述预设条件包括：
条件1：血压测量装置在z轴方向上的线加速度不超过第一阈值，且线加速度的变化量不超过第二阈值。在x或y轴方向上的线加速度超过第三阈值，且线加速度的变化量超过第四阈值。
条件2：血压测量装置当前绕z轴转动的角速度超过第五阈值，绕x或y轴转动的角速度不超过第六阈值。
其中，在所述“条件1”中，所述线加速度的变化量通过t2时刻到t1时刻之间的第二加速度变化来表示，且所述第二加速度为线加速度，其中第二时刻t2为当前时刻，第一时刻t1为前一时刻。并且，假设
血压测量装置在t2时刻z轴方向上的第二线加速度表示为a z0(t2)，
血压测量装置在t2时刻x轴方向上的第二线加速度表示为a x0(t2)，
血压测量装置在t2时刻y轴方向上的第二线加速度表示为a y0(t2)，
血压测量装置在z轴方向上的第二线加速度的变化量表示为Δa z0(t)，其中Δa z0(t)＝a z0(t2)-a z0(t1)；
血压测量装置在x轴方向上的第二线加速度的变化量表示为Δa x0(t)，其中Δa x0(t)＝a x0(t2)-a x0(t1)；
血压测量装置在y轴方向上的第二线加速度的变化量表示为Δa y0(t)，其中Δa y0(t)＝a y0(t2)-a y0(t1)。
则所述“条件1”为
a z0(t2)≤δ1，且Δa z0(t)≤δ2；并且，a x0(t2)＞δ3，Δa x0(t)＞δ4，
或者，a z0(t2)≤δ1，且Δa z0(t)≤δ2；并且，a y0(t2)＞δ3，Δa y0(t)＞δ4。
其中，a z0(t1)为血压测量装置在t1时刻z轴方向上的第二线加速度，a x0(t1)为血压测量装置在t1时刻x轴方向上的第二线加速度，a y0(t1)为血压测量装置在t1时刻y轴方向上的第二线加速度。
δ1为第一阈值，δ2为第二阈值，δ3为第三阈值，δ4为第四阈值，且δ3＞δ1，δ4＞δ2。
在上述“条件2”中，所述血压测量装置当前时刻绕x轴、y轴或z轴转动的角速度为前述实施例中三轴陀螺仪测量的第一角速度ω x0，ω y0，ω z0，假设
血压测量装置在t2时刻绕z轴转动的第一角速度为ω z0(t2)，
血压测量装置在t2时刻绕x轴转动的第一角速度为ω x0(t2)，
血压测量装置在t2时刻绕y轴转动的第一角速度为ω y0(t2)，
则所述“条件2”为
ω z0(t2)＞δ5，且，ω x0(t2)≤δ6；或者，ω z0(t2)＞δ5，且，ω y0(t2)≤δ6。
其中，δ5为第五阈值，δ6为第六阈值，且δ5＞δ6。
需要说明的是，在达到上述“第二种方式”时，在满足条件1和条件2的情况下，还需要保持1-2s的预设时长后，可以推断出用户正在尝试将血压测量装置的高度调整至与心脏等高的位置，进而认为用户有要测量血压的意愿，此时执行前述方法步骤101至105。
本实施例中，通过加速度和角速度等参数判断用户是否有测量血压的意愿，并在确定有意愿时，启动角度计算和高度检测功能，从而实现血压的自动测量。
此外，方法还包括：如果上述测量参数不满足上述“条件1”和“条件2”中的至 少一个，则不启动血压测量装置的自动测量功能。
下面介绍与上述方法实施例对应的装置实施例。
图11为本申请实施例提供的一种角度确定装置的结构示意图。所述装置可以前述实施例中的一种血压测量装置，或位于所述血压测量装置中的一个部件，例如芯片。并且，该装置可以实现前述实施例中的血压测量装置的所有功能。
具体地，如图11所示，该装置可以包括：获取单元1101、处理单元1102。此外，所述装置还可以包括发送单元、存储单元等其他的单元或模块。
其中，获取单元1101，用于获得三轴陀螺仪上报的所述血压测量装置的第一角速度，所述第一角速度为用户佩戴的所述血压测量装置从第一位置移动至第二位置时的角速度，所述第二位置相比于所述第一位置靠近用户心脏。
处理单元1102，用于根据所述第一角速度获得所述血压测量装置的第一角加速度，根据所述第一角加速度获得所述血压测量装置的第一线加速度，根据所述第一线加速度获得三轴中每个轴方向上的加速度分量，利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正或补偿，得到三个轴方向上的真实加速度；以及根据所述真实加速度确定第一夹角。
其中，所述第一夹角为在所述第二位置时用户佩戴有所述血压测量装置的手臂与用户心脏的水平线之间的夹角。
可选的，在本实施例的一种具体的实施方式中，处理单元1102，具体用于根据第一关系式确定所述血压测量装置在所述x轴、所述y轴和所述z轴方向上的加速度分量，所述第一关系式为：
Figure PCTCN2021087581-appb-000014
其中，a x为血压测量装置在所述x轴方向上的加速度分量，a y为血压测量装置在所述y轴方向上的加速度分量，a z为血压测量装置在所述z轴方向上的加速度分量；a yz为所述血压测量装置在y轴和z轴组成的平面上的线加速度，a xz为所述血压测量装置在x轴和z轴组成的平面上的线加速度，a xy为所述血压测量装置在x轴和y轴组成的平面上的线加速度。
进一步地，处理单元1102，具体用于根据所述每个轴方向上的加速度分量和所述第二加速度的第二关系式确定所述三个轴方向上的真实加速度，所述第二关系式为：
Figure PCTCN2021087581-appb-000015
其中，a′ x为血压测量装置在x轴方向上的真实加速度，a′ y为血压测量装置在y轴方向上的真实加速度，a′ z为血压测量装置在z轴方向上的真实加速度；所述血压测量装置在所述x轴方向、所述y轴方向和所述z轴方向上的所述第二加速度分别表示为a x0，a y0，a z0。
可选的，在本实施例的另一种具体的实施方式中，处理单元1102，还用于获取相对于同一参考面的第一高度和第二高度之间的高度差，判断所述高度差是否在预设范围内，如果在所述预设范围内，且所述血压测量装置在所述第一高度静止达到预设时长，则加压测量用户的血压值。其中，第一高度为在所述第二位置时的所述血压测量装置到所述参考面的距离，所述第二高度为用户心脏到所述参考面的距离。
可选的，在本实施例的又一种具体的实施方式中，处理单元1102，还用于根据所述第一夹角和第一长度确定所述第一高度，所述第一长度为佩戴有血压测量装置的用户前臂长。
可选的，在本实施例的又一种具体的实施方式中，处理单元1102，还用于如果所述高度差在所述预设范围之外，则提示用户调整所述血压测量装置的所述第一高度。
可选的，在本实施例的又一种具体的实施方式中，所述血压测量装置中包括扬声器；处理单元1102，具体用于根据第一对应关系获取与所述高度差对应的第一音阶，通过所述扬声器播放所述第一音阶。其中，所述第一对应关系中包括至少一个高度差与至少一个音阶之间的对应关系，且每个所述高度差对应一个音阶。
可选的，在本实施例的又一种具体的实施方式中，所述血压测量装置中包括指示灯；处理单元1102，具体用于根据第二对应关系获取与所述高度差对应的第一颜色，按照所述第一颜色点亮所述指示灯。其中，所述第二对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，且每个所述高度差对应一种颜色。
可选的，在本实施例的又一种具体的实施方式中，所述血压测量装置中包括指示灯；处理单元1102，具体用于根据第三对应关系获取与所述高度差对应的第二颜色，和与所述第二颜色对应的第一频率，按照所述第一频率和所述第二颜色点亮所述指示灯。其中，所述第三对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，以及每种颜色对应的频率。
可选的，在本实施例的又一种具体的实施方式中，获取单元1101，还用于获取所述血压测量装置的位置变化时产生的测量参数。处理单元1102，还用于检测如果所述测量参数满足预设条件，且所述血压测量装置在第三高度静止达到预设时长，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。其中，所述测量参数包括：所述血压测量装置在三个轴中每个轴方向上的线加速度，线加速的变化量和角速度。
所述满足预设条件包括：条件1和条件2，进一步地，
条件1：所述血压测量装置在z轴方向上的线加速度不超过第一阈值，且线加速度的变化量不超过第二阈值；在x轴或y轴方向上的线加速度超过第三阈值，且线加速度的变化量超过第四阈值。
条件2：所述血压测量装置当前绕z轴转动的角速度超过第五阈值，绕x轴或y轴转动的角速度不超过第六阈值。
并且，所述第三阈值大于所述第一阈值，所述第四阈值大于所述第二阈值，所述第五阈值大于所述第六阈值。
可选的，在本实施例的又一种具体的实施方式中，处理单元1102，还用于检测是否接收到用户在所述血压测量装置的表盘上点击“启动”按键操作的指示，如果是，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
本实施例提供的血压测量装置，通过三轴陀螺仪测量的角速度，获得加速度在x轴方向、y轴方向和z轴方向的加速度分量，并利用该加速度分量补偿三轴加速度计在非匀速运动过程中的外力干扰，最终确定出三轴方向上的真实加速度，从而计算出准确第一夹角，并通过该第一夹角得到准确的高度差，从而提高了血压测量的准确性。
一方面，避免使用更多的传感器，只通过三轴加速度计来确定第一夹角，通过三轴陀螺仪修正加速度分量，提高了心脏齐平检测的动态准确性。另一方面，通过算法识别用户佩戴的血压测量装置是否处于推荐测量高度，能够提高角度检测的动态性能，从而更好地实时判断与心脏的高度关系。并且在未达到推荐高度情况下提示用户调整手臂位置，并通过用户界面UI反馈的方式让用户更直观地寻找到推荐的测量高度，并实现自动测量的同时还增加了操作的趣味性。
另外，在具体硬件实现中，本实施例还提供了一种终端设备，可用于实现前述实施例中的角度确定方法和血压测量方法。该终端设备可以是前述实施例中的一种血压测量装置。
具体地，图12示出了终端设备的结构示意图。该终端设备可以包括处理器110和存储器120，此外，还可以包括：显示屏130、传感器模块140、音频模块150、指示灯160、通信模块170和一个或多个接口180等。
在本申请一些实施例中，该终端设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置，本发明实施例示意的结构并不构成对终端设备的具体限定。
其中，显示屏130包括第一屏幕130A和第二屏幕130B，第一屏幕130A用于显示用户的血压值，比如SBP和DBP。第二屏幕130B用于提示用户移动前臂后的血压测量装置是否位于推荐高度，即当前高度差等级。
传感器模块140可以包括压力传感器140A，陀螺仪传感器140B，加速度传感器140C，触媒传感器140D，距离传感器140E。另外，传感器模块140中还可以包括光传感器、指纹传感器，温度传感器等。
其中，压力传感器140A用于感受压力信号，采集用户手腕部位的脉搏信号，并将该脉搏信号发送给处理器110。陀螺仪传感器140B可以用于确定终端设备的运动姿态，获得终端设备在x轴、y轴和z轴方向上的角速度。可选的，陀螺仪传感器140B为前述实施例中的三轴陀螺仪。加速度传感器140C可检测终端设备在各个方向上(包括x轴、y轴和z轴)加速度的大小。当终端设备静止时可检测出重力的大小及方向。还可以用于识别终端设备的姿态。可选的，加速度传感器140C为前述实施例中的三轴加速度计。触摸传感器140D也称“触控器件”。触摸传感器140D可以设置于显示屏130内，由触摸传感器140D与显示屏130组成触摸屏，也称“触控屏”。触摸传感器140D用于检测作用于其上或附近的触摸操作，比如用户在显示屏130上点击“启动”按键操作。距离传感器140E用于测量距离，比如所述第一高度和所述第二高度等。
可选的，上述压力传感器140A的功能还可以通过光传感器来实现，具体地，光传感器实时地采集用户手腕部位的脉搏信号，并将该脉搏信号发送给处理器110。
处理器110可以包括一个或多个处理单元，其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。进一步地，处理器可以由集成电路(Integrated  Circuit，IC)组成，例如可以由单颗封装的IC所组成，也可以由连接多颗相同功能或不同功能的封装IC而组成。举例来说，处理器可以仅包括中央处理器(central processing unit，CPU)、数字信号处理器(digital signal processor，DSP)等。
处理器110，用于获取传感器模块140上报的测量参数，并根据测量参数确定第一角度并根据第一角度确定测量用户的血压值，将该血压值显示在第一屏幕130A上。另外，处理器110还用于检测高度差是否在预设范围内，并且当不在所述预设范围内时，通过第二屏幕130B、音频模块150、指示灯160等至少一种来提示用户调整终端设备的高度。
处理器110中还可以设置存储器120，所述存储器120用于存储计算机程序指令和传感器模块采集的数据。在一些实施例中，存储器120可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。内部存储器可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如声音播放功能，语音提示功能、指示灯点亮功能)等。存储数据区可存储终端设备获取或者使用的数据(比如加速度分量、真实加速度、高度差、血压值)等。此外，存储器120可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。
处理器110通过运行存储在内部存储器的指令，和/或存储在设置于处理器中的存储器的指令，执行各种功能应用以及数据处理。
此外，该终端设备还可以包括通信模块170，所述通信模块170可以包括至少一个天线，移动通信模块，无线通信模块，调制解调处理器以及基带处理器等。
具体地，天线可用于发射和接收电磁波信号，且每个天线可用于覆盖单个或多个通信频带。此外，不同的天线还可以复用，以提高天线的利用率。移动通信模块包括2G/3G/4G/5G等无线通信功能的模块。此外，还可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。无线通信模块可以提供应用在终端设备上的包括无线局域网(wireless local area networks，WLAN)、如无线保真(wireless fidelity，WiFi)网络，蓝牙(bluetooth)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。
接口180可以是处理器110中包括的一个或多个接口，具体地，所述一个或多个接口可以包括集成电路(inter-integrated circuit，I2C)接口，集成电路内置音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口和/或通用串行总线(universal serial bus，USB)接口等。
此外，终端设备还可以包括按键，比如开机键，音量键等。
在本实施例中，当所述终端设备作为一种血压测量装置时，可以实现前述实施例中图3和图5所示的方法步骤，并且前述图11所示装置中，获取单元1101的功能可以由通信模块170、传感器模块140等部件来实现；处理单元1102所要实现的功能则可以由处理器110实现；存储单元的功能可以由存储器120实现。
可选的，在一种可能的实施方式中，图12所示的终端设备为腕带式血压计，血压手环或血压手表等。
本申请实施例还提供一种处理芯片，所述处理芯片，包括处理器和接口电路，其中接 口电路与处理器耦合，进一步地，还包括存储介质，处理器可用于执行所述存储介质中存储的计算机程序或指令，从而实现前述实施例中的角度确定方法和血压测量方法；所述接口电路则用于与处理芯片之外的其它模块进行通信。
其中，所述处理器可以是如图12所示的处理器110，所述存储介质可以是如图12所示的存储器120。
此外，本申请实施例还提供一种计算机存储介质，其中，该计算机存储介质可存储有程序，该程序执行时可包括本申请提供的角度确定方法、血压测量方法的部分或全部步骤。所述的存储介质包括但不限于磁碟、光盘、只读存储记忆体(read only memory，ROM)或随机存储记忆体(random access memory，RAM)等。
在上述实施例中，可以全部或部分通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。
所述计算机程序产品包括一个或多个计算机指令，例如配对指令、传输指令，在计算机加载和执行所述计算机程序指令时，全部或部分地产生按照本申请上述各个实施例所述方法流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，比如第一设备泛指拍摄界面中的任意一个设备，而不是特指位于拍摄界面中的某一个设备。此外，术语“包括”和“包含”以及他们的任何变形，意图在于覆盖不排他的包含。
本说明书中各个实施例之间相同相似的部分互相参见即可。尤其，对于角度确定装置、终端设备的实施例而言，由于其基本相似于方法实施例，所以描述的比较简单，相关之处参见方法实施例中的说明即可。
以上所述的本申请实施方式并不构成对本申请保护范围的限定。

Claims (24)

  1. 一种角度确定方法，其特征在于，所述方法应用于一种腕带式血压测量装置，所述方法包括：
    获得三轴陀螺仪上报的所述血压测量装置的第一角速度，所述第一角速度为用户佩戴的所述血压测量装置从第一位置移动至第二位置时的角速度，所述第二位置相比于所述第一位置靠近用户心脏；
    根据所述第一角速度获得所述血压测量装置的第一角加速度；
    根据所述第一角加速度获得所述血压测量装置的第一线加速度；
    根据所述第一线加速度获得三轴中每个轴方向上的加速度分量；
    利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度；
    根据所述真实加速度确定第一夹角，所述第一夹角为在所述第二位置时用户佩戴有所述血压测量装置的前臂长与用户心脏的水平线之间的夹角。
  2. 根据权利要求1所述的方法，其特征在于，所述第一线加速度包括：所述血压测量装置在x轴方向上的线加速度，y轴方向上的线加速度和z轴方向上的线加速度；
    所述根据所述第一线加速度获得三轴中每个轴方向上的加速度分量，包括：
    根据第一关系式确定所述血压测量装置在所述x轴、所述y轴和所述z轴方向上的加速度分量，所述第一关系式为：
    Figure PCTCN2021087581-appb-100001
    其中，a x为血压测量装置在所述x轴方向上的加速度分量，a y为血压测量装置在所述y轴方向上的加速度分量，a z为血压测量装置在所述z轴方向上的加速度分量；a yz为所述血压测量装置在y轴和z轴组成的平面上的线加速度，a xz为所述血压测量装置在x轴和z轴组成的平面上的线加速度，a xy为所述血压测量装置在x轴和y轴组成的平面上的线加速度。
  3. 根据权利要求2所述的方法，其特征在于，利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度，包括：
    根据所述每个轴方向上的加速度分量和所述第二加速度的第二关系式确定所述三个轴方向上的真实加速度，所述第二关系式为：
    Figure PCTCN2021087581-appb-100002
    其中，a x′为血压测量装置在x轴方向上的真实加速度，a y′为血压测量装置在y轴方向上的真实加速度，a z′为血压测量装置在z轴方向上的真实加速度；所述血压测量装置在所述x轴方向、所述y轴方向和所述z轴方向上的所述第二加速度分别表示 为a x0，a y0，a z0。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述方法还包括：
    获取相对于同一参考面的第一高度和第二高度之间的高度差，所述第一高度为在所述第二位置时的所述血压测量装置到所述参考面的距离，所述第二高度为用户心脏到所述参考面的距离；
    判断所述高度差是否在预设范围内，
    如果是，且所述血压测量装置在所述第一高度静止达到预设时长，则加压测量用户的血压值。
  5. 根据权利要求4所述的方法，其特征在于，所述获取相对于同一参考面的第一高度和第二高度之间的高度差之前，还包括：
    根据所述第一夹角和第一长度确定所述第一高度，所述第一长度为佩戴有所述血压测量装置的用户前臂长。
  6. 根据权利要求4所述的方法，其特征在于，所述方法还包括：
    如果所述高度差在所述预设范围之外，则提示用户调整所述血压测量装置的所述第一高度。
  7. 根据权利要求6所述的方法，其特征在于，所述血压测量装置中包括扬声器；
    所述提示用户调整所述血压测量装置的所述第一高度，包括：
    根据第一对应关系获取与所述高度差对应的第一音阶，所述第一对应关系中包括至少一个高度差与至少一个音阶之间的对应关系，且每个所述高度差对应一个音阶；
    通过所述扬声器播放所述第一音阶。
  8. 根据权利要求6所述的方法，其特征在于，所述血压测量装置中包括指示灯；
    所述提示用户调整所述血压测量装置的所述第一高度，包括：
    根据第二对应关系获取与所述高度差对应的第一颜色，所述第二对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，且每个所述高度差对应一种颜色；
    按照所述第一颜色点亮所述指示灯。
  9. 根据权利要求6所述的方法，其特征在于，所述血压测量装置中包括指示灯；
    所述提示用户调整所述血压测量装置的所述第一高度，包括：
    根据第三对应关系获取与所述高度差对应的第二颜色，和与所述第二颜色对应的第一频率，所述第三对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，以及每种颜色对应的频率；
    按照所述第一频率和所述第二颜色点亮所述指示灯。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述获得三轴陀螺仪上报的所述血压测量装置的第一角速度之前，所述方法还包括：
    获取所述血压测量装置的位置变化时产生的测量参数；
    如果所述测量参数满足预设条件，且所述血压测量装置在第三高度静止达到预设时长，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能；
    其中，所述测量参数包括：所述血压测量装置在三个轴中每个轴方向上的线加速度，线加速的变化量和角速度，所述满足预设条件包括：
    条件1：所述血压测量装置在z轴方向上的线加速度不超过第一阈值，且线加速 度的变化量不超过第二阈值；在x轴或y轴方向上的线加速度超过第三阈值，且线加速度的变化量超过第四阈值；
    条件2：所述血压测量装置当前绕z轴转动的角速度超过第五阈值，绕x轴或y轴转动的角速度不超过第六阈值；
    并且，所述第三阈值大于所述第一阈值，所述第四阈值大于所述第二阈值，所述第五阈值大于所述第六阈值。
  11. 根据权利要求1-9任一项所述的方法，其特征在于，所述获得三轴陀螺仪上报的所述血压测量装置的第一角速度之前，所述方法还包括：
    检测是否接收到用户在所述血压测量装置的表盘上点击“启动”按键操作的指示；
    如果是，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
  12. 一种角度确定装置，其特征在于，所述装置包括：
    获取单元，用于获得三轴陀螺仪上报的所述血压测量装置的第一角速度，所述第一角速度为用户佩戴的所述血压测量装置从第一位置移动至第二位置时的角速度，所述第二位置相比于所述第一位置靠近用户心脏；
    处理单元，用于根据所述第一角速度获得所述血压测量装置的第一角加速度，根据所述第一角加速度获得所述血压测量装置的第一线加速度，根据所述第一线加速度获得三轴中每个轴方向上的加速度分量，利用所述每个轴方向上的加速度分量对三轴加速度计测量的第二加速度进行修正，得到三个轴方向上的真实加速度；以及根据所述真实加速度确定第一夹角；
    所述第一夹角为在所述第二位置时用户佩戴有所述血压测量装置的手臂与用户心脏的水平线之间的夹角。
  13. 根据权利要求12所述的装置，其特征在于，
    所述处理单元，具体用于根据第一关系式确定所述血压测量装置在所述x轴、所述y轴和所述z轴方向上的加速度分量，所述第一关系式为：
    Figure PCTCN2021087581-appb-100003
    其中，a x为血压测量装置在所述x轴方向上的加速度分量，a y为血压测量装置在所述y轴方向上的加速度分量，a z为血压测量装置在所述z轴方向上的加速度分量；a yz为所述血压测量装置在y轴和z轴组成的平面上的线加速度，a xz为所述血压测量装置在x轴和z轴组成的平面上的线加速度，a xy为所述血压测量装置在x轴和y轴组成的平面上的线加速度。
  14. 根据权利要求13所述的装置，其特征在于，
    所述处理单元，具体用于根据所述每个轴方向上的加速度分量和所述第二加速度的第二关系式确定所述三个轴方向上的真实加速度，所述第二关系式为：
    Figure PCTCN2021087581-appb-100004
    其中，a x′为血压测量装置在x轴方向上的真实加速度，a y′为血压测量装置在y轴方向上的真实加速度，a z′为血压测量装置在z轴方向上的真实加速度；所述血压测量装置在所述x轴方向、所述y轴方向和所述z轴方向上的所述第二加速度分别表示为a x0，a y0，a z0。
  15. 根据权利要求12-14任一项所述的装置，其特征在于，
    所述处理单元，还用于获取相对于同一参考面的第一高度和第二高度之间的高度差，判断所述高度差是否在预设范围内，如果在所述预设范围内，且所述血压测量装置在所述第一高度静止达到预设时长，则加压测量用户的血压值；
    所述第一高度为在所述第二位置时的所述血压测量装置到所述参考面的距离，所述第二高度为用户心脏到所述参考面的距离。
  16. 根据权利要求15所述的装置，其特征在于，
    所述处理单元，还用于根据所述第一夹角和第一长度确定所述第一高度，所述第一长度为佩戴有所述血压测量装置的用户前臂长。
  17. 根据权利要求15所述的装置，其特征在于，
    所述处理单元，还用于如果所述高度差在所述预设范围之外，则提示用户调整所述血压测量装置的所述第一高度。
  18. 根据权利要求17所述的装置，其特征在于，所述血压测量装置中包括扬声器；
    所述处理单元，具体用于根据第一对应关系获取与所述高度差对应的第一音阶，通过所述扬声器播放所述第一音阶；
    所述第一对应关系中包括至少一个高度差与至少一个音阶之间的对应关系，且每个所述高度差对应一个音阶。
  19. 根据权利要求17所述的装置，其特征在于，所述血压测量装置中包括指示灯；
    所述处理单元，具体用于根据第二对应关系获取与所述高度差对应的第一颜色，按照所述第一颜色点亮所述指示灯；
    所述第二对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，且每个所述高度差对应一种颜色。
  20. 根据权利要求17所述的装置，其特征在于，所述血压测量装置中包括指示灯；
    所述处理单元，具体用于根据第三对应关系获取与所述高度差对应的第二颜色，和与所述第二颜色对应的第一频率，按照所述第一频率和所述第二颜色点亮所述指示灯；
    所述第三对应关系中包括至少一个高度差与至少一种颜色之间的对应关系，以及每种颜色对应的频率。
  21. 根据权利要求12-20任一项所述的装置，其特征在于，
    所述获取单元，还用于获取所述血压测量装置的位置变化时产生的测量参数；
    所述处理单元，还用于检测如果所述测量参数满足预设条件，且所述血压测量装置在第三高度静止达到预设时长，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能；
    其中，所述测量参数包括：所述血压测量装置在三个轴中每个轴方向上的线加速度，线加速的变化量和角速度，所述满足预设条件包括：
    条件1：所述血压测量装置在z轴方向上的线加速度不超过第一阈值，且线加速度的变化量不超过第二阈值；在x轴或y轴方向上的线加速度超过第三阈值，且线加速度的变化量超过第四阈值；
    条件2：所述血压测量装置当前绕z轴转动的角速度超过第五阈值，绕x轴或y轴转动的角速度不超过第六阈值；
    并且，所述第三阈值大于所述第一阈值，所述第四阈值大于所述第二阈值，所述第五阈值大于所述第六阈值。
  22. 根据权利要求12-20任一项所述的装置，其特征在于，
    所述处理单元，还用于检测是否接收到用户在所述血压测量装置的表盘上点击“启动”按键操作的指示，如果是，则启动所述三轴陀螺仪和所述三轴加速度计的测量功能。
  23. 一种处理芯片，包括处理器和存储器，所述处理器与所述存储器耦合，其特征在于，
    所述存储器，用于存储计算机程序指令；
    所述处理器，用于执行所述存储器中存储的所述指令，以使得所述处理芯片执行如权利要求1至11中任一项所述的方法。
  24. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序指令，
    当所述计算机程序指令被运行时，实现如权利要求1至11中任一项所述的方法。
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