CN111481209B - Head movement measuring device under rotation condition - Google Patents
Head movement measuring device under rotation conditionDownload PDFInfo
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- CN111481209B CN111481209BCN202010263190.1ACN202010263190ACN111481209BCN 111481209 BCN111481209 BCN 111481209BCN 202010263190 ACN202010263190 ACN 202010263190ACN 111481209 BCN111481209 BCN 111481209B
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- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
- A61B5/1116—Determining posture transitions
- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
- A61B5/1118—Determining activity level
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—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
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- A61B5/6814—Head
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Abstract
Description
Technical Field
The invention relates to the technical field of vestibular function adaptability training, in particular to a head movement measuring device under a rotating condition.
Background
The Coriolis acceleration sensitivity inspection is an important means for military personnel such as air force, astronauts and the like to carry out vestibular function adaptability training, and currently, a swivel chair rotates around a human body z axis, a trainee or a subject sits on the swivel chair, and moves a head while rotating to generate Coriolis acceleration stimulation. The head motion amplitude and the head motion frequency in the rotation process of the swivel chair are important indexes for measuring the stimulation quantity of the Coriolis acceleration, and a monitoring device for measuring the active head motion of a subject under the current rotation condition is not reported. Coriolis acceleration stimulation is generally based on a set amplitude and frequency of head motion to estimate the amount of stimulation to the subject or trainee, and is not monitored and tracked quantitatively for implementation specific situations.
Acceleration is generally calculated according to a coriolis acceleration simple calculation formula, and the stimulation amount is the coriolis acceleration multiplied by the stimulation time.
Ac＝αωr……(1)
Wherein r-radius of human semicircular canal (cm), generally calculated as 0.3 cm;
ac-coriolis acceleration value (cm/s)2 )；
Alpha- -subject head swing speed (π/3 s)-1 )；
Omega- - -rotational acceleration of swivel chair (radian/s)
In most documents, α is calculated by a predetermined head-moving swing velocity, and thus the actual head-moving swing velocity cannot be actually monitored, and the accuracy of the coriolis acceleration evaluation of the trainee or the subject cannot be ensured.
Disclosure of Invention
The invention aims to provide a head movement measuring device under a rotation condition, so as to realize real-time quantitative detection and recording of head movement amplitude and head movement frequency of a subject or a trainee under the rotation condition and meet the requirement of the head movement amplitude on the number of times of head movement, and to more accurately evaluate the Coriolis acceleration stimulation quantity of the trainee or the subject.
In order to achieve the purpose, the invention provides the following scheme:
a head movement measuring device under a rotating condition comprises a swivel chair, a flexible head movement detecting module, a detecting control module, a head movement data receiving module and head movement detecting control software;
the swivel chair is used for bearing a trainee and generating different modes of rotation around the Z axis of the human body;
the flexible head movement detection module is fixed at the center of the top of the head of the testee through a hair tip fixing magic tape; the flexible head movement detection module is used for detecting a left deviation angle and a right deviation angle of the head of the subject relative to the sagittal plane of the subject under the condition of rotating the swivel chair; obtaining head movement detection data by the front deviation angle and the back deviation angle of the head of the subject relative to the coronal plane of the subject, and sending the head movement detection data to the detection control module;
the detection control module is fixed on the swivel chair, is in wireless connection with the head movement data receiving module, and is used for sending the head movement detection data to the head movement data receiving module;
the head movement data receiving module is connected with the head movement detection control software and is used for sending the head movement detection data to the head movement detection control software;
the head movement detection control software is used for displaying and storing the head movement detection data, and determining the head movement amplitude, the head movement times and the head movement frequency of the testee according to the head movement detection data.
Optionally, the flexible head movement detection module includes a tilt sensor with a dual-axis tilt detection function and a flexible carrier;
the inclination angle sensor is fixed on the flexible carrier, and the flexible carrier is fixed with the top of the head of a subject through a tip fixing magic tape;
the tilt angle sensor is connected with the detection control module.
Optionally, the flexible head movement detection module further includes a power supply filter capacitor and an RC filter;
the power supply filter capacitor is arranged between the anode and the cathode of a power supply of the inclination angle sensor;
the RC filter is arranged at the output end of the inclination angle sensor.
Optionally, the detection control module includes a first filter circuit, an operational amplifier circuit, a main control unit, and a head-moving data sending module;
the flexible head movement detection module is connected with the first filter circuit, the first filter circuit is connected with the operational amplification circuit, the operational amplification circuit is connected with the main control unit, and the main control unit is connected with the head movement data sending module;
the head moving data sending module is in wireless connection with the head moving data receiving module.
Optionally, the detection control module further includes a power conversion module;
the input end of the power supply conversion module is connected with the lithium battery, and the output end of the power supply conversion module is respectively connected with the signal filter circuit, the operational amplifier circuit, the main control unit and the head movement data sending module;
the power supply conversion module is also connected with the flexible head movement detection module.
Optionally, the power conversion module includes a first filter capacitor, a voltage stabilizer, and a second filter capacitor;
the input end of the voltage stabilizer is connected with the lithium battery through the first filter capacitor;
the output end of the voltage stabilizer is connected with the signal filter circuit, the operational amplification circuit, the main control unit, the head movement data sending module and the flexible head movement detection module through the second filter capacitor.
Optionally, the detection control module further includes a battery power detection module;
the battery electric quantity detection module comprises a second filter circuit and a double operational amplifier;
the input end of the double operational amplifier is connected with the lithium battery through the second filter circuit, and the output end of the double operational amplifier is connected with the main control unit.
Optionally, the head movement data sending module and the head movement data receiving module are both bluetooth modules.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a head movement measuring device under a rotating condition, which comprises a swivel chair, a flexible head movement detecting module, a detecting control module, a head movement data receiving module and head movement detecting control software; the flexible head movement detection module is fixed in the middle of the top of the head of the testee through a tip fixing magic tape; the flexible head movement detection module is used for detecting a left deviation angle and a right deviation angle of the head of the subject relative to the sagittal plane of the subject under the condition of rotating the swivel chair; the head of the subject is subjected to front deviation angle and back deviation angle relative to the coronal plane of the subject, head movement detection data are obtained and uploaded to head movement detection control software through the detection control module and the head movement data receiving module; the head movement detection control software is used for displaying and storing the head movement detection data, and determining the head movement amplitude, the head movement frequency and the head movement frequency of the testee according to the head movement detection data. Reliable quantitative detection hardware and technical support are provided for testing and training the Coriolis acceleration stimulation sensitivity in air force flying, astronauts electing and training.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a head movement measuring device under rotation conditions according to the present invention;
fig. 2 is a schematic structural principle diagram of a head movement measuring device under a rotation condition provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a head movement measuring device under a rotation condition so as to realize real-time quantitative detection and recording of head movement amplitude and head movement frequency of a subject or trainee under the rotation condition and head movement times meeting the requirements of the head movement amplitude.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
In order to achieve the purpose, the invention provides the following scheme:
as shown in fig. 1 and 2, the present invention provides a head movement measuring device under rotation condition, which comprises a swivel chair, a flexible head movement detecting module 13, a detectingcontrol module 23, a head movementdata receiving module 22 and head movement detectingcontrol software 21; the swivel chair is used for bearing a trainee and generating different modes of rotation around the Z axis of the human body; the flexible head movement detection module 13 is fixed at the middle position of the top of the head of the testee through a hair tip fixing magic tape 14; the flexible head movement detection module is used for detecting a left deviation angle and a right deviation angle of the head of the subject relative to the sagittal plane of the subject under the condition of rotating the swivel chair; the front offset angle and the rear offset angle of the head of the subject relative to the coronal plane of the subject to obtain head movement detection data, and send the head movement detection data to thedetection control module 23; thedetection control module 23 is fixed on the backrest of the swivel chair, supplies power to the head movement detection module, and communicates with the data receiving module through Bluetooth; thedetection control module 23 is wirelessly connected with the head movementdata receiving module 22, and thedetection control module 23 is configured to send the head movement detection data to the head movementdata receiving module 22; the head movementdata receiving module 22 is connected to the head movementdetection control software 21, and the head movementdata receiving module 22 is configured to send the head movement detection data to the head movementdetection control software 21; the head movementdetection control software 21 is used for displaying and storing the head movement detection data, and determining the head movement amplitude, the head movement times and the head movement frequency of the subject according to the head movement detection data.
The revolving chair can rotate according to the set speed profile curve, including the set trapezoidal speed curve, the sine harmonic curve and the like, and the maximum speed can reach 450 degrees per second.
The hair tip fixing magic tape 14 and the head movement detection module 13 are directly connected into a whole, the head movement detection module is fixed on the hair quality on the top of the head by the magic tape, the head movement detection module is prevented from sliding when the head of a testee moves, the calibration of the head movement initial position is accurately carried out, the head movement detection module is stable and fixed, the image of the testee is not influenced, the weight of the head movement detection module 13 is light, and the head movement detection module does not have large pressure sense to the testee. Turning on a power switch of a detection control module, checking electric quantity, and if the electric quantity is insufficient, charging in advance; the head movement data receiving module is connected with a computer, the computer is opened, head movement detection control software is started, a subject firstly calibrates left and right head movements and front and back head movements, markers for left, right, forward and back head movements are set according to head movement amplitude required by training or inspection, the subject firstly tilts the head forward by 30 degrees to ensure that a horizontal semicircular canal is in a horizontal position, then starts head movement and is attached to markers in different directions, and the required head movement amplitude degrees are reached, namely 30 degrees leftwards, 30 degrees rightwards, 25 degrees forwards and 25 degrees backwards and 15 degrees backwards. Then the swivel chair can start rotating according to a set rotating curve, a subject starts moving according to the command 'start head movement' of the engineering, then starts moving the head, the head movement detection control software works to synchronously press keys to start recording the head movement condition, the software displays the head movement degrees and curves of the front, the back, the left and the right of the head in real time, records the head movement times according to the condition of reaching a calibration position, hears the command 'end head movement', the subject stops moving the head, the software controls the person to press keys to stop recording the head movement, and the swivel chair stops moving. The overall condition of the head movement can be observed through software playback, the head movement times and the head movement frequency meeting the head movement amplitude requirement of the examination can be obtained through a head movement detection report of the software, and the Coriolis acceleration stimulation quantity born by a subject can be calculated according to the head movement times and frequency and the angular speed and time of the rotation of the swivel chair during the head movement to serve as a measurement index for evaluating the sensitivity of a volunteer.
The head movement detection control software displays the head movement amplitude, the head movement frequency and the head movement times, can store a test result in a database, and supports review and check; during each test, calibrating the reference of the head position to ensure the consistency of the measurement; after the detection is started, displaying the angle value of the head moving amplitude in real time; the angle values of left, right, front and back can be displayed; displaying a real-time curve of the angle value; after the detection is started, counting for one time when the amplitude of the head swing reaches a threshold value, wherein the counting is invalid when the amplitude of the head swing does not reach the threshold value, and the counting is not carried out, and after the amplitude of the head swing reaches the threshold value, the head returns to be below the threshold value, and the head again reaches the threshold value to carry out the next counting; calculating the head movement frequency according to the head movement times per minute for display; the running of the software is monitored by adopting a watchdog, if the phenomenon of program crash or runaway is found, the software automatically runs the program to a state before a problem occurs so as to ensure the normal running of detection; during communication, an automatic disconnection connection design is adopted, if communication abnormity occurs, communication can be restarted, data are not lost, and the device is safe and reliable; and eliminating the maximum value and the minimum value of the acquired data, calculating the average value of the acquired data for 3 times, and performing software filtering to ensure the stability of the acquired data.
The flexible head motion detection module 13 comprises a tilt sensor with a dual-axis tilt detection function and a flexible carrier; the inclination angle sensor is fixed on the flexible carrier, and the flexible carrier is fixed with the top of the head of a subject through a tip fixing magic tape; the tilt sensor is connected to thedetection control module 23. The head movement detection module selects an inclination angle sensor with a double-shaft inclination angle detection function, the detection range is +/-90 degrees, the resolution reaches 0.025 degrees, the head movement detection module has damping frequency response and temperature compensation, output signals comprise analog voltage output and SPI output, and the power supply voltage is 0.3-5.5V.
The flexible head movement detection module 13 further comprises a power supply filter capacitor and an RC filter; the power supply filter capacitor is arranged between the anode and the cathode of a power supply of the inclination angle sensor; the RC filter is arranged at the output end of the inclination angle sensor. According to the invention, 100nf capacitors are directly connected to VCC and GND of the tilt angle sensor for filtering, so that the stability of power supply is ensured; at the output of the sensor, low-pass RC filters of 5.1k Ω and 10nf are used to reduce noise interference.
Optionally, thedetection control module 23 includes a first filter circuit, an operational amplifier circuit, a main control unit, and a head-moving data sending module; the flexible head movement detection module is connected with the first filter circuit, the first filter circuit is connected with the operational amplification circuit, the operational amplification circuit is connected with the main control unit, and the main control unit is connected with the head movement data sending module; the head movement data sending module is wirelessly connected with the head movementdata receiving module 22. And processing the voltage value output by the tilt sensor acquisition module. The output voltage of the tilt angle sensor is 0-5V, the acquisition voltage of the main control unit is 0-5V, and the operational amplifier adopts the emitter follower principle to amplify current so as to improve the load capacity of the whole amplifying circuit and provide the stability of the A/D input voltage.
Thedetection control module 23 further comprises a power conversion module; the input end of the power supply conversion module is connected with the lithium battery, and the output end of the power supply conversion module is respectively connected with the signal filter circuit, the operational amplification circuit, the main control unit and the head movement data sending module; the power conversion module is also connected with the flexible head motion detection module 13. The power supply conversion module comprises a first filter capacitor, a voltage stabilizer and a second filter capacitor; the input end of the voltage stabilizer is connected with the lithium battery through the first filter capacitor; the output end of the voltage stabilizer is connected with the signal filter circuit, the operational amplifier circuit, the main control unit, the head movement data sending module and the flexible head movement detection module through the second filter capacitor. The shell of thedetection control module 23 is made of ABS materials, and two LED indicator lamps are arranged on the shell and respectively indicate a power-on state and a battery electric quantity alarm state. The green indicator light is turned on to indicate that the control module is electrified to work, and the red LED indicator light is turned on to indicate that the battery is low in electric quantity and needs to be charged; the side surface of the control module is provided with a power switch. The detection control module provides a 5V power supply for the head movement detection module; the detection control module adopts a 9V rechargeable lithium battery for power supply, adopts a voltage stabilizer for power supply conversion, has the power supply current reaching 1A and the output precision of 1 percent, has the functions of current limiting and overheating cutoff, and is connected with a first filter capacitor of 10uF and a second filter capacitor of 100nF for filtering the power supply at the input end and the output end of the device.
Thedetection control module 23 further comprises a battery power detection module; the battery electric quantity detection module comprises a second filter circuit and a double operational amplifier; the input end of the double operational amplifier is connected with the lithium battery through the second filter circuit, and the output end of the double operational amplifier is connected with the main control unit. In order to ensure the normal operation of the test, the detection control module needs to detect the electric quantity of the battery voltage, and when the electric quantity is lower than a certain voltage value and the control module cannot work normally, an alarm prompt needs to be given. The HA17358 is used for detecting the electric quantity, the HA17358 is supplied by a single power supply and is a dual operational amplifier with high gain and internal phase compensation, the output end of the battery is connected with the input end of the amplifier through a filter circuit, the output end of the amplifier is connected with the input end of the main control unit with the A/D conversion function, and the main control unit judges whether the current electric quantity of the battery is normal or not according to the collected voltage value.
The head movement data sending module and the head movementdata receiving module 22 are both bluetooth modules. The Bluetooth module with ultra-low power consumption and 3mA current in a standby mode is selected, data transmission has a transparent transmission function, and the data transmission can be realized without performing communication operation on the module after the module is set; the module is provided with an onboard antenna, so that the external antenna is reduced, and the volume is reduced; the working frequency range is 2402-2480MHz, the theoretical maximum transmission distance is 20m, and the interface adopts a TTL serial port, so that the interface with the main control unit is convenient. The Bluetooth module receives the data sent by the detection control module and transmits the data to the head movement detection control software through the USB interface; the output level of the receiving Bluetooth module is TTL, the level of the computer USB interface is USB level, and the matching of the levels is realized by selecting an SP3232 chip to be matched with a USB-to-RS 232 communication line.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a head movement measuring device under a rotating condition, which comprises a swivel chair, a flexible head movement detecting module, a detecting control module, a head movement data receiving module and head movement detecting control software, wherein the swivel chair is connected with the flexible head movement detecting module through a connecting piece; the flexible head movement detection module is fixed in the middle of the top of the head of the testee through a tip fixing magic tape; the flexible head movement detection module is used for detecting a left deviation angle and a right deviation angle of the head of the subject relative to the sagittal plane of the subject under the condition of rotating the swivel chair; the head of the subject is offset to the front and back angles of the coronal plane of the subject to obtain head movement detection data, and the head movement detection data is uploaded to head movement detection control software through the detection control module and the head movement data receiving module; the head movement detection control software is used for displaying and storing the head movement detection data, and determining the head movement amplitude, the head movement frequency and the head movement frequency of a tested person according to the head movement detection data, so that the real-time quantitative detection and recording of the head movement amplitude and the head movement frequency of the tested person or the trained person under the rotation condition and the head movement frequency meeting the requirements of the head movement amplitude are realized, and reliable quantitative detection hardware and technical support are provided for the detection and training of Coriolis acceleration stimulation sensitivity in air force flight, astronauts selection and training.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. The head movement measuring device under the rotation condition is characterized by comprising a swivel chair, a flexible head movement detecting module, a detecting control module, a head movement data receiving module and head movement detecting control software;
the swivel chair is used for bearing a trainee and generating different modes of rotation around the Z axis of the human body;
the flexible head movement detection module is fixed at the center of the top of the head of the testee through a hair tip fixing magic tape; the flexible head movement detection module is used for detecting a left deviation angle and a right deviation angle of the head of the subject relative to the sagittal plane of the subject under the condition of rotating the swivel chair; the head of the subject is subjected to front offset angle and back offset angle relative to the coronal plane of the subject, head movement detection data are obtained, and the head movement detection data are sent to the detection control module; the test process specifically comprises: ensuring that a head movement detection module does not slide when a subject moves the head, and is used for calibrating the initial position of the head movement, wherein the subject firstly calibrates left and right head movement and front and back head movement, marks moving leftwards, rightwards, forwards and backwards are set according to the head movement amplitude required by training or inspection, the subject firstly tilts the head forwards by 30 degrees to ensure that a horizontal semicircular canal is in a horizontal position, then starts head movement and is attached to the marks in different directions to reach the required head movement amplitude degrees, then a swivel chair can start rotating according to a set rotating curve, the subject starts head movement according to a mechanical command, then starts moving the head, simultaneously starts head movement condition recording, displays the head movement degrees and curves of the front, the back, the left and the right of the head in real time, records the head movement times according to the condition of reaching the calibration position, hears the mechanical command of 'head movement ending', the subject stops head movement, software controls personnel to press keys to stop head movement recording, the swivel chair stops operating, and obtains the head movement detection data;
the detection control module is fixed on the swivel chair, is in wireless connection with the head movement data receiving module, and is used for sending the head movement detection data to the head movement data receiving module;
the head movement data receiving module is connected with the head movement detection control software and is used for sending the head movement detection data to the head movement detection control software;
the head movement detection control software is used for displaying and storing the head movement detection data, and determining the head movement amplitude, the head movement times and the head movement frequency of the testee according to the head movement detection data.
2. The rotational condition head motion measurement apparatus according to claim 1, wherein the flexible head motion detection module comprises a tilt sensor having a dual axis tilt detection function and a flexible carrier;
the inclination angle sensor is fixed on the flexible carrier, and the flexible carrier is fixed with the top of the head of a subject through a tip fixing magic tape;
the tilt angle sensor is connected with the detection control module.
3. The rotational condition head movement measurement device of claim 2, wherein the flexible head movement detection module further comprises a power supply filter capacitor and an RC filter;
the power supply filter capacitor is arranged between the anode and the cathode of a power supply of the inclination angle sensor;
the RC filter is arranged at the output end of the inclination angle sensor.
4. The head movement measuring device under the rotating condition according to claim 1, wherein the detection control module comprises a first filter circuit, an operational amplifier circuit, a main control unit and a head movement data sending module;
the flexible head movement detection module is connected with the first filter circuit, the first filter circuit is connected with the operational amplification circuit, the operational amplification circuit is connected with the main control unit, and the main control unit is connected with the head movement data sending module;
the head moving data sending module is in wireless connection with the head moving data receiving module.
5. The rotational condition cephalometric measurement device according to claim 4, characterized in that said detection control module further comprises a power conversion module;
the input end of the power supply conversion module is connected with the lithium battery, and the output end of the power supply conversion module is respectively connected with the signal filter circuit, the operational amplifier circuit, the main control unit and the head movement data sending module;
the power supply conversion module is also connected with the flexible head movement detection module.
6. The device of claim 5, wherein the power conversion module comprises a first filter capacitor, a regulator, and a second filter capacitor;
the input end of the voltage stabilizer is connected with the lithium battery through the first filter capacitor;
the output end of the voltage stabilizer is connected with the signal filter circuit, the operational amplification circuit, the main control unit, the head movement data sending module and the flexible head movement detection module through the second filter capacitor.
7. The rotational condition head motion measurement apparatus according to claim 4, wherein the detection control module further comprises a battery level detection module;
the battery electric quantity detection module comprises a second filter circuit and a double operational amplifier;
the input end of the double operational amplifier is connected with the lithium battery through the second filter circuit, and the output end of the double operational amplifier is connected with the main control unit.
8. The device of claim 4, wherein the head movement data transmitting module and the head movement data receiving module are Bluetooth modules.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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