CN103431866B - Method and device for measuring lying leg rise - Google Patents
Method and device for measuring lying leg rise Download PDFInfo
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- CN103431866B CN103431866B CN201310396269.1A CN201310396269A CN103431866B CN 103431866 B CN103431866 B CN 103431866B CN 201310396269 A CN201310396269 A CN 201310396269A CN 103431866 B CN103431866 B CN 103431866B
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Abstract
The invention relates to a method and a device for measuring lying leg rise. The device comprises a single-chip microcomputer, a display, a small keyboard, and two obliquity sensors respectively fixed on a calf part and a thigh part. Whether the leg rise action is up-to-standard or not is determined by judging whether the angle measurement value of the obliquity sensor on the calf part is 90 degrees or higher. Whether the legs are straight or not is determined by judging whether the difference of the angle measurement value of the obliquity sensor on the thigh part and the angle measurement value of the obliquity sensor on the calf part is less than or equal to a predetermined value. When the leg rise action is up-to-standard and the legs are straight, the action of the lying leg rise is qualified.
Description
Technical field
The present invention relates to a kind of measuring method and device of supine leg lift, particularly a kind ofly detect supine leg lift action a kind of method and apparatus whether up to standard according to sensor and single-chip microcomputer.
Background technology
Supine leg lift is a Undergraduate Quality test item be simply easy to do, and requires that university students completes some according to the requirement of action criteria and could pass in 1 minutes.
As shown in Figure 1, measured's health is lain on the back on mat, and two-arm is placed in health both sides, and legs joined stretches.Pad is sidelong and is put a twin columns mark post, and be positioned at hip joint both sides, mark post is high 50 centimetres, is connected in two bars with a rubber band.Experimenter draws the abdomen, directly lift lower limb must lift (at a right angle with ground) at a right angle, is then reduced into starting position.
When actual measurement, also require that both legs close up and stretch as far as possible.Because test belongs to stipulated time inside counting, action is relatively very fast, so the judgement whether both legs stretch is just more difficult.In the test of reality, student is in order to pursue speed, and change often appears in action, and whether up to standard being just difficult to of action judges with naked eyes.The situation so just causing the last number of times examining executor and examinee oneself to record inconsistent occurs., man-to-manly must measure when detecting meanwhile, also result in the workload that a large amount of personnel waste and improve teacher.
In order to help teacher grasp the judgement of this examination and alleviate workload, be badly in need of a kind of convenient easy supine leg lift test instrunment, assisted teacher counts to the detection of tester with to its execution, thus solves above produced problem.
Summary of the invention
Whether the present invention utilizes two groups of obliquity sensors up to standard to detect both legs action.Concrete grammar is as follows:
One group of obliquity sensor level is fixed on shank, and according to the feature of obliquity sensor, when both legs are lifted, obliquity sensor has a level output corresponding with angle, judges whether upper act reaches action request according to the situation of change of level.This addresses the problem and directly lift the action request that lower limb must lift (at a right angle with ground) at a right angle.
In order to solve the problem judging extended legs with thighs, introduce other one group of obliquity sensor.This group obliquity sensor level is fixed on leg portion, and now, there is a difference in the angle that shank and thigh can cause two sensors initially to export because thickness is different, can be preset according to situation about exporting by a single-chip microcomputer to this differential seat angle.Using preset angle difference or potential difference as a standard.Both legs in the process of lifting, detect the situation of change of this differential seat angle by single-chip microcomputer, when differential seat angle changes in a small scope, assert that action is qualified, otherwise, defective.And the setting of this scope can be preset with reference to initial angle difference by the external connection keyboard be connected with single-chip microcomputer.
Finally, using one-off simultaneously up to standard for two groups of actions as once successfully examining action, by what be connected with single-chip microcomputer
A LCD MODULE shows, and reaches the object of counting.
By supine leg lift measuring device of the present invention, the performance of this project of supine leg lift effectively can be detected.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparent, accompanying drawing in the following describes is only some embodiments of the present invention, to those skilled in the art, under the prerequisite not paying creative work, other mode can also be obtained according to these accompanying drawings.
Fig. 1 is existing supine leg lift test count method.
Fig. 2 is the structural representation of the supine leg lift measuring device of the embodiment of the present invention.
Fig. 3 is the operating circuit of obliquity sensor 3.
Fig. 4 is the power module of obliquity sensor 3.
Fig. 5 is the flow chart of the supine leg lift method of testing of the embodiment of the present invention.
Fig. 6 is the system structure schematic diagram of the supine leg lift measuring device of the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing embodiment of the present invention being done and introducing in detail further.
Fig. 2 is the structural representation of the supine leg lift measuring device of the embodiment of the present invention.As shown in Figure 2, this supine leg lift measuring device 1 comprises single-chip microcomputer 2, obliquity sensor 31 and 32, display 4, and keypad 5.Wherein obliquity sensor, display 4, and keypad 5 is connected with single-chip microcomputer 2 respectively.
Display 4, for the qualified action number shown, plays the object of counting.It can be the display of small-sized 128*64.
Obliquity sensor 31 and 32 adopts single-shaft inclination angle sensor SCA60C, and it can investigate the angular slope of 0-90 degree, and is exported by the electrical potential information corresponding with angle, and physical circuit as shown in Figure 3.
Sensor 31 and 32 uses 5V DC source to drive, and 7 ends are measuring voltage outfan.Inside has angle and voltage conversion device, exports the voltage corresponded according to different angles, according to formula:
a＝arcsin(0.5Vo-0.25Vdd)，
Wherein, a exports angle for measuring, and Vo is the measuring voltage exported, and Vdd is input voltage, i.e. driving voltage 5V.
When both legs develop simultaneously, when obliquity sensor SCA60C is horizontal, Vo end exports the analog voltage of+0.5V.Sensor SCA60C only accurately can detect the angular range of 0-90 degree, when both legs lift make obliquity sensor become the angle of 90 degree with horizontal plane time, now Vo end exports the analog voltage of+4.5V.Within the scope of the inclination angle of 0-90 degree, the analog voltage signal being proportional to inclination angle size+0.5-+4.5V that Vo end exports, when both legs develop simultaneously to make the angle between obliquity sensor and horizontal plane from the range of 90 degree to 180 degree time, what output end vo exported is the analog voltage signal changing to+0.5V from+4.5V successively, therefore can be determined the angle of both legs and horizontal plane by the size of determination sensor SCA60C output end vo voltage.According to the change in voltage situation of outfan, by A/D conversion equipment, the analog quantity of output is converted to digital quantity input single-chip microcomputer, utilizes single-chip microcomputer to control it, reach the object of test.
Distinguish from knee, knee following lower leg portion fixed angle sensor 31, fixed angle sensor 32 above knee, extended legs with thighs, lie against in testing cushion, obliquity sensor is horizontal plane as with reference to face, because thigh is different with the rugosity of shank, so now, two groups of obliquity sensors have two groups of angles that are different and horizontal plane.
When both legs are lifted, obliquity sensor there will be angle change.When the angle of sensor 31 reach or more than 90 degree time, think that upper movement is done up to standard.Now, sensor 32 also there will be angle change simultaneously, the angle of sensor 31 with sensor 32 is compared, when both differential seat angles are substantially consistent in whole course of action, thinks that extended legs with thighs is up to standard.
When two groups of data are simultaneously up to standard, think that this group action is up to standard, now, enumerator once counts.The like, action at every turn up to standard is shown by an additive operation on enumerator, thus reaches the object of technology at the appointed time.
Above-mentioned differential seat angle can utilize single-chip microcomputer to preset.Before starting test, first need fixed test device.Need tester to be closed up by both legs after fixing, be placed horizontally on mat.The position be fixed on lower limb due to this device two sensors is different, be exactly that individual leg situation there are differences in addition, a differential seat angle is there is between two sensors when can make initial, we need this differential seat angle to carry out recording and by single-chip microcomputer preset one have differential seat angle be according to introduce the tolerance upper limit, be default angle difference.This angle preset inputs by keypad 5, when the difference between the value that two groups of obliquity sensors detect is in the angular range preset, then assert that extended legs with thighs is up to standard.
Fig. 4 is the power module of obliquity sensor.As shown in Figure 4, the power drives that obliquity sensor uses is 5V DC source, Given this instrument in use should be tried one's best light to reach the object not affecting tester, the design adopts button cell or aneroid battery to power, this just needs the 5v change-over circuit of a voltage stabilizing, at this, the design utilizes integrated regulator L7805 to realize.Specific implementation is as follows: L7805 is one or three end 5V voltage stabilizing pio chips, and 1 end connects input voltage, and 3 ends are that 5V exports, 2 end ground connection.Two 101 nonpolarity small capacitances of input and output side, effect is that the high frequency transient improving regulated power supply responds.The main device of 100 μ F electric capacity at two ends suppresses self-oscillatory effect.
Single-chip microcomputer 2 adopts C8051F005.This single-chip microcomputer is low in energy consumption, stable performance, can well carry out AD conversion and voltage ratio pair, is the ideal component of the design.Utilize this single-chip microcomputer, above-mentioned several functions can be realized:
1. can determine by programme-control the change in voltage that the concrete deviation angle measured by sensor 3 causes, thus determine whether up to standard the upper movement of measured is done;
2., by presetting, using the angle that exists between two sensors fixing before detecting as reference item, what the variable angle situation in contrast in act process between two sensors judged both legs stretches situation;
3. the enumerator that qualified action is attached thereto by addition program input is counted.By this process, play the object of Intelligent Measurement.
Fig. 5 is the flow chart of the supine leg lift method of testing of the embodiment of the present invention.As shown in Figure 5, the method for testing 500 of the present embodiment, specifically can comprise the steps:
Step 501, instrument is energized, counter O reset;
Step 502, initializes, two sensors output potential during observation original state, and determines potential difference, meanwhile, carries out angle preset according to potential difference, namely inputs a default angle value a by keyboard 5;
Step 503, reads the angle value a1 that obliquity sensor 31 is measured, and the angle value a2 that obliquity sensor 32 is measured;
Step 504, judges whether the value of a1 is be greater than 90 degree.If be greater than 90 degree, proceed to step 505, otherwise proceed to step 507;
Step 505, judges the absolute value of the difference of a1 and a2 and the relation of preset angle angle value a, if | a1-a2| < a, then proceed to step 506, otherwise proceed to step 507;
Step 506, Counter Value adds 1, proceeds to step 507;
Step 507, reads next measured angular angle value of lower two obliquity sensors;
Step 508, to the time?
Step 509, test terminates, the value of display counter;
Step 510, terminates.
Fig. 6 is the single system structural representation of the supine leg lift measuring device of the embodiment of the present invention.
In the design, gathered by two angular transducer SCA60C and obtain a voltage analog relevant to angle, by A/D conversion equipment, secondary analog quantity being converted to digital quantity is input in controller C8051F005, compared according to input now and the angle digital quantity preset by controller, thus determine whether up to standard.Predetermined amount carries out input setting by keypad.Program itself has angle preset and comparison function, determines qualified action by output string.Finally, final measurement passing number is shown by a LCD liquid crystal display.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the measuring method of a supine leg lift measuring device, this supine leg lift measuring device comprises single-chip microcomputer, display, keypad, and be separately fixed at 2 obliquity sensors of lower leg portion and leg portion, extended legs with thighs, level is put in testing cushion, and obliquity sensor is that horizontal plane is as reference face, wherein display, keypad, and obliquity sensor is all connected to single-chip microcomputer, the method comprises the following steps:
Read the angle value that two obliquity sensors are measured;
By judging whether the angle measurement of lower leg portion obliquity sensor reaches or more than 90 degree, assert whether up to standard upper movement is done;
Whether be less than or equal to a preset value by the difference of the angle measurement of the angle measurement and lower leg portion sensor that judge leg portion obliquity sensor, assert whether both legs stretch;
If up to standard and extended legs with thighs is made in upper movement, assert that action is qualified;
Show the qualified action frequency completed at the appointed time.
2. the measuring method of supine leg lift measuring device as claimed in claim 1, is characterized in that, judge that the method for obliquity sensor angle measurement is, when obliquity sensor is horizontal, obliquity sensor exports the analog voltage of+0.5V; When both legs lift make obliquity sensor become the angle of 90 degree with horizontal plane time, obliquity sensor exports the analog voltage of+4.5V.
3. the measuring method of supine leg lift measuring device as claimed in claim 2, it is characterized in that, obliquity sensor inside has angle and voltage conversion device, exports the voltage corresponded according to different angles, according to formula:
a＝arcsin(0.5Vo-0.25Vdd)，
Wherein, a exports angle for measuring, and Vo is the measuring voltage exported, and Vdd is input voltage.
4. the measuring method of supine leg lift measuring device as claimed in claim 1, it is characterized in that, the determination mode of preset value is, tester is needed to be closed up by both legs after fixed angle sensor, be placed horizontally on mat, obliquity sensor is horizontal plane as with reference to face, the differential seat angle between record two sensors, and according to this differential seat angle determination preset value.
5. the measuring method of supine leg lift measuring device as claimed in claim 1, is characterized in that, obliquity sensor adopts single-shaft inclination angle sensor SCA60C, and single-chip microcomputer adopts C8051F005.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310396269.1A CN103431866B (en) | 2013-08-28 | 2013-08-28 | Method and device for measuring lying leg rise |
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| CN201310396269.1A CN103431866B (en) | 2013-08-28 | 2013-08-28 | Method and device for measuring lying leg rise |
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| CN103431866A CN103431866A (en) | 2013-12-11 |
| CN103431866B true CN103431866B (en) | 2015-04-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105725973A (en) * | 2016-02-02 | 2016-07-06 | 杨松 | Shaping pillow capable of collecting human body physiological data and system |
| CN113332659B (en) * | 2021-06-11 | 2022-06-07 | 深圳市第二人民医院(深圳市转化医学研究院) | Control system of exoskeleton system and exoskeleton system |
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