CN105435423B - Method for detecting and prompting lower limb treading action of human body - Google Patents

Abstract

A method for detecting and prompting the pedaling action of the lower limbs of the human body is applied to a sports device with pedals on the left and right sides, and detects the pedaling force when the pedals are stepped on. The method is to set a force detector for detecting the pedaling force on the pedals. When the soles of the athlete's feet step on the pedals on the left and right sides of the sports device in turn, the force detector detects and generates a telecommunication signal, and transmits the telecommunication signal to a control unit to convert it into a pedaling force value, and the control unit compares the pedaling force value to see if it meets the preset value, and displays a message when it does not meet the preset value, thereby forming the present invention.

Description

Method for Detecting and Prompting Footstepping Actions of Human Lower Limbs

technical field

The invention relates to a method for detecting and prompting human lower limbs stampede, especially a method capable of detecting human lower limbs trampled and providing information in real time to avoid sports injuries.

Background technique

Known sports equipment, such as the exercise bike shown in Figure 17, is that the body 91 has a pedal 92 that is symmetrical on both sides. The pedaling motion of the lower limbs can be achieved by pedaling, and the same is true for other exercise devices such as treadmills and the like that have pedals 92 on both sides.

However, the above-mentioned known exercise devices do not have the function of detecting the pedaling posture or pedaling force, so if the athlete has improper pedaling posture or pedaling force during use, the athlete cannot be notified immediately to make corrections , but feel soreness in specific parts after using it, and then know that there is a problem of stepping posture or stepping force during the use of the exercise device. Although it can be improved in the future, it has already caused sports injuries to the athlete, which will affect the health of the body.

Therefore, how to solve the problems of the above-mentioned known motion devices is the key point of the present invention.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems and provide a method for detecting and prompting human lower limbs trampling action, which can display information in real time to avoid sports injuries caused by improper trampling posture or trampling force during exercise.

To achieve the above object, the present invention adopts the following technical solutions:

A method for detecting and prompting the stepping action of the lower limbs of the human body, which is applied to a sports device with pedals on the left and right sides, and detects the pedaling force when stepping on the pedals. The method is to set at least A power detector for detecting the pedaling force, when the soles of the athlete's feet step on the pedals on the left and right sides of the exercise device in turn, through the at least one power detector for detecting the pedaling force set on each pedal The device detects and generates at least one telecommunication signal, and transmits the at least one telecommunication signal to a control unit for conversion into a pedaling force value, and compares the pedaling force value with the control unit to see if it meets a preset value stored in the control unit The set value, or the difference number of the difference of the pedaling force value, and a message will be displayed when it does not match.

In a preferred embodiment, the pedaling force value is the sum of the pedaling force values detected by at least one force detector of each pedal, and the pedaling force value of each pedal is separately compared with the control unit The preset value is compared to determine whether the sum of the pedal force values of each pedal conforms to the corresponding preset value, and if not, a message is displayed.

In a preferred embodiment, the control unit further calculates the difference between the pedal force values when the two pedals are stepped on in turn, and stores a difference number of the difference in the control unit, and compares the difference with the control unit. Whether the difference meets the difference number, if not, a message will be displayed.

In a preferred embodiment, each of the pedals is provided with at least one front force detector at the front end, and at least one rear force detector is provided at the rear end of each of the pedals, and the control unit Comparing whether the difference in pedaling force detected by the at least one front force detector and the at least one rear force detector conforms to the difference, and if not, displays a message.

In a preferred embodiment, each of the pedals is provided with at least one left force detector on the left side, and at least one right side force detector is provided at the right side of each of the pedals, to control The unit compares whether the difference in pedaling force detected by the at least one left force detector and the at least one right force detector meets the difference, and displays a message if not.

In a preferred embodiment, each of the pedals is connected to a turntable pivotally arranged in the movement device, an angle detector is set on the turntable, and the turntable is provided with a detected part corresponding to the angle detector, and the movement The person steps on each of the pedals with the sole of the foot back and forth, and uses the angle detector to measure the position signal of the rotation angle of the turntable, and the control unit calculates the position of the sole of the athlete's foot based on the position signal.

In a preferred embodiment, the pedaling force value is the sum of the pedaling force values detected by one less force detector of each pedal, and the pedaling force value of each pedal is independently compared with the control unit. The preset value is compared to determine whether the sum of the pedal force values of each pedal conforms to the preset value, and if not, a message is displayed.

In a preferred embodiment, the control unit further calculates the difference between the pedaling forces when the two pedals are stepped on in turn, and stores the difference of the difference in the control unit, and compares the difference with the control unit. Whether the difference matches the difference number, if not, a message will be displayed.

In a preferred embodiment, each of the pedals is provided with at least one front force detector at the front end, and at least one rear force detector is provided at the rear end of the pedals, and the control unit is compared to Whether the difference between the pedaling force detected by the at least one front force detector and the at least one rear force detector meets the difference number, and if not, a message is displayed.

In a preferred embodiment, each of the pedals is provided with at least one left force detector on the left side, and at least one right side force detector is provided at the right side of the pedals, and the control unit Comparing whether the difference in pedaling force detected by the at least one left force detector and the at least one right force detector conforms to the difference, and if not, displays a message.

The beneficial effect of the present invention is: a force detector is installed on the pedal, and the control unit converts the telecommunication signal into the pedal force value and compares it with the stored preset value or difference number, thereby judging the movement of the athlete's feet. Whether the pedaling posture and the pedaling force are abnormal when the sole of the foot is trampled on the foot pedal 12, such as the aforementioned judgment on the incorrect pedaling action of the athlete's forefoot and heel, abnormal pedaling load and uneven distribution of pedaling force of both feet, and When the comparison result is generated, a message can be displayed to notify the athlete in real time, so that the athlete can correct the abnormal situation by adjusting the pedaling posture and pedaling force, so that the occurrence of sports injuries can be avoided during the exercise process, and the fitness will be avoided. Injury situation.

Description of drawings

Fig. 1 is a schematic perspective view of the three-dimensional structure of the exercise bike of the first and second embodiments of the present invention.

FIG. 2 is a schematic diagram of the positions of the force detectors on the pedals according to the first embodiment of the present invention.

FIG. 3 is a block diagram of the electrical connection between the force detector and the control unit according to the first or second embodiment of the present invention.

FIG. 4 is a flow chart of detecting and prompting human lower limb stepping action according to the first embodiment of the present invention.

FIG. 5 is a schematic diagram of the position of the force detector on the pedal according to the second embodiment of the present invention.

FIG. 6 is a flow chart of detecting and prompting human lower limb stepping action according to the second embodiment of the present invention.

Fig. 7 is a schematic perspective view of the three-dimensional structure of the exercise bike of the third to sixth embodiments of the present invention.

FIG. 8 is a schematic diagram of the position of the force detector on the pedal according to the third embodiment of the present invention.

FIG. 9 is a block diagram of the electrical connection between the force detector and the control unit according to the third embodiment of the present invention.

Fig. 10 is a schematic diagram of the movement of the lower limbs when the pedal is stepped on by the sole of the foot according to the third embodiment of the present invention.

FIG. 11 is a flow chart of detecting and prompting human lower limb stepping action according to the third embodiment of the present invention.

12 is a block diagram of the electrical connection between the force detector, the angle detector and the control unit according to the fourth or fifth embodiment of the present invention.

FIG. 13 is a flow chart of detecting and prompting human lower limb stepping action according to the fourth embodiment of the present invention.

FIG. 14 is a flow chart of detecting and prompting human lower limb stepping action according to the fifth embodiment of the present invention.

FIG. 15 is a schematic diagram of the position of the force detector on the pedal according to the sixth embodiment of the present invention.

FIG. 16 is a block diagram of the electrical connection between the force detector, the angle detector and the control unit according to the sixth embodiment of the present invention.

Fig. 17 is a schematic perspective view of a known exercise bike.

detailed description

The following examples illustrate possible implementations of the present invention, but they are not intended to limit the protection scope of the present invention and are described in advance.

Please refer to FIG. 1 to FIG. 16 , those shown in the figures are the selected embodiment structures of the present invention, which are for illustration purposes only, and are not limited by this structure in the patent application.

The invention provides a method for detecting and prompting the pedaling action of the lower limbs of the human body, which is applied to a sports device with pedals on the left and right sides, and the sports device has a resistance device that provides resistance to the set pedals when stepping on it , and detect the stepping force when stepping on the pedal. In this method, at least one power detector for detecting the pedaling force is arranged on each of the pedals. The set force detector detects and generates a telecommunication signal, and transmits the telecommunication signal to a control unit to convert it into a pedaling force value, and compares the pedaling force value with the control unit to see if it conforms to a value stored in the control unit Default value, when the pedal force value does not meet the default value, a message will be displayed.

As shown in Figure 1, the exercise device used in the present embodiment is an exercise bike 1, and the left and right sides of the exercise bike 1 are pivoted with pedals 12 with cranks 11, and the resistance device (not shown) is located on the exercise bike. 1, when the athlete rides on the exercise bike 1, he uses the soles of both feet to step on the pedals 12 on the left and right sides of the exercise bike 1 in a circular motion.

As shown in FIG. 2 , in the present embodiment, a front force detector 121 is provided at the front end of each pedal 12 , and a rear force detector 122 is provided at the rear end of each pedal. And as shown in FIG. 3 , the front force detector 121 and the rear force detector 122 of each pedal 12 are electrically connected to the control unit 2 .

As shown in the flow chart in Figure 4, the method for detecting and prompting the pedaling action of the lower limbs of the human body in this embodiment is that when the athlete starts to pedal in a circular motion on the pedals 12 on the left and right sides of the exercise bike 1 with the soles of both feet, The front side power detector 121 detects the stepping force of the forefoot part and generates a telecommunication signal, and the rear side power detector 122 detects the rear end power of each pedal 12 and generates a telecommunication signal, and the front side power detection The detector 121 and the rear side force detector 122 transmit the measured telecommunication signal to the control unit 2 and convert it into a pedaling force value, and the control unit 2 is used to calculate the front side force detector 121 and the rear side force The detector 122 detects whether the obtained difference of the pedaling force value matches the corresponding difference number.

If the difference between the pedaling force values detected by the front side force detector 121 and the rear side force detector 122 does not meet the corresponding difference number, a message will be displayed at this time, and the message indicates that the athlete's foot The pedaling action of the forefoot and heel is incorrect, further correcting the athlete's pedaling action. For example, the front side force detector 121 is obviously lower than its corresponding preset value, while the rear side force detector 122 is obviously higher than its corresponding preset value. Suspected to have the situation that the toes are turned up, this message is notified to the sportsman, so that the sportsman pays attention to correcting not to let the toes be turned up when stepping on the pedal 12 .

If the difference between the pedaling force values detected by the front side force detector 121 and the rear side force detector 122 meets the corresponding difference number, it is further judged whether the sum of the pedaling force values of each pedal 12 is Comply with the corresponding default value. At this time, the pedaling force value is the sum of the pedaling force values detected by the front side force detector 121 and the rear side force detector 122 of each pedal 12, and the pedaling force value of each pedal 12 is The value (referred to here as the total pedaling force value) is independently compared with the preset value corresponding to the control unit 2 to determine whether the sum of the pedaling force values of each pedal 12 meets the corresponding preset value. If not, a message will be displayed indicating that the pedaling load is abnormal, further modify the pedaling force or adjust the resistance provided by the resistance device. For example, when the athlete is stepping on the pedal 12, the sum of the pedaling force value sensed by the front side force detector 121 and the rear side force detector 122 of the pedal 12 stepped on by the left foot is obviously greater than Its corresponding default value, at this time, a message is displayed to indicate that the pedaling load is too large, and the athlete is asked to reduce the pedaling speed or reduce the resistance value of the resistance device.

If the sum of the pedaling force detected by the front force detector 121 and the rear force detector 122 meets the corresponding preset value, it is further determined whether the pedaling force of the athlete's feet is evenly distributed. At this time, the control unit calculates the difference between the pedal force values when the two pedals 12 are stepped on in turn, and stores a difference number corresponding to the difference in the control unit 2, and compares the difference with the control unit 2. Whether the difference meets the difference number, if not, a message will be displayed indicating that the pedaling force of the athlete's feet is not evenly distributed, and the pedaling force of the athlete's feet will be further corrected to the average. For example, when the athlete is stepping on the pedal 12, the sum of the pedaling force value sensed by the front side force detector 121 and the rear side force detector 122 of the pedal 12 stepped on by the right foot is significantly greater than The front side force detector 121 and the rear side force detector 122 of the pedal 12 stepped on by the left foot sense the sum of the pedaling force values. At this time, a message is displayed indicating that the pedaling force of the right foot is greater than that of the left foot, please exercise Or reduce the pedaling force of the right foot or increase the pedaling force of the left foot to correct the pedaling force of the athlete's feet to the average.

If the difference meets the number of differences, it is further judged whether the athlete stops stepping on the pedal 12, if the athlete stops stepping on the pedal 12, then the detection of human kinematics ends; if the athlete continues to step on the pedal 12 , continue the detection of human kinematics.

It is not difficult to find the advantages of the present invention from the above description, in that the pedal 12 is provided with force detectors (such as the aforementioned front side force detector 121 and the rear side force detector 122), and the control unit 2 Convert the telecommunication signal to the value of the pedaling force and compare it with the stored preset value or difference number, so as to judge whether the pedaling posture and pedaling force of the athlete when stepping on the pedal 12 with the soles of both feet are abnormal, such as the aforementioned Judging the incorrect pedaling action on the forefoot and heel of the athlete, the abnormal pedaling load, and the uneven distribution of the pedaling force of both feet, and when the comparison result is generated, a message can be displayed to notify the athlete in real time, allowing the athlete to step on it. The adjustment of posture and stepping force corrects the abnormal situation, so the occurrence of sports injuries can be avoided during the exercise process, and the situation of physical injury caused by fitness can be avoided.

Of course, there are still many examples of the invention in which only the details vary. Please refer to Fig. 1, Fig. 3, Fig. 5 to Fig. 6, which is the second embodiment of the present invention, wherein the main difference from the first embodiment is that each of the pedals 12 does not have a front force detector 121 With this rear side strength detector 122, and as shown in Figure 5, be to set up a left side strength detector 123 at the stepping place on the left side of the sole of the foot, and set up a right side strength detector 123 at the stepping place on the right side of the sole of the foot Detector 124. And as shown in FIG. 3 , the left force detector 123 and the right force detector 124 of each pedal 12 are both electrically connected to the control unit 2 .

This embodiment detects and prompts the method for stepping on the lower limbs of the human body, which is the process shown in Figure 6. When the athlete starts to step on the pedals 12 on the left and right sides of the exercise bike 1 with the soles of both feet in a circular motion, the The left side power detector 123 detects the trampling power on the left side of the sole and generates a telecommunication signal, and the right side power detector 124 detects the trampling power on the right side of the sole and generates a telecommunication signal, and the left side power detector 123 and the rear The side force detector 124 then transmits the measured telecommunication signal to the control unit 2 for conversion into a pedal force value, and the control unit 2 calculates the left side force detector 123 and the right pressure detector 124 Detecting whether the difference between the obtained pedaling force values matches the corresponding difference.

At this time, if it does not match, a message will be displayed indicating that the soles of the feet are unevenly exerted on both sides during the pedaling action, so as to further correct the athlete's pedaling action. For example, the sole of the left foot has excessive inversion when stepping on the pedal 12, and the sole of the right foot has the situation of excessive valgus when stepping on the pedal 12. At this time, the exerciser is notified to correct by displaying a message, so that Adjust the posture of the sole of the left foot inwards and the soles of the right foot inwards to correct, and then, as described in the first embodiment, judge whether the pedaling load is abnormal, the pedaling force of both feet is not evenly distributed, and whether to stop pedaling. The same effect as that of the first embodiment is achieved.

Please refer to Fig. 7 to Fig. 10, which is the third embodiment of the present invention, wherein the main difference with the previous embodiment is that, as shown in Fig. The turntable 13 provided in the movement device is provided with an angle detector 14 on the turntable 13, and the turntable 13 is provided with a detected portion 131 corresponding to the angle detector 14, and the detected portion 131 is used in this embodiment For the interphase grid. And as shown in FIG. 8 , only one force detector 125 is provided on the pedal 12 of the present embodiment. And as shown in FIG. 9 , the force detector 125 of each pedal 12 is electrically connected with the control unit 2 .

When the athlete steps on each of the pedals 12 with the soles of the feet to perform a circular motion, the lower limbs of the athlete will have repeated movements of flexion and extension as shown in Figure 10. Form stepping force with sole to pedal 12 with stretching. The method for detecting and prompting the stepping action of the lower limbs of the human body in this embodiment is the process shown in Figure 11. The position signal of the rotation angle of the turntable 13 is measured by the angle detector 14, and the control unit 2 uses the position signal Calculate the position of the sole of the athlete's foot, cooperate with the pedaling force measured by the force detector 125 provided on each pedal 12, and further calculate the force of the lower limb joints including the knee joint and hip joint or the force of the lower limb muscle groups. Forced kinematics information and display information in real time.

In this embodiment, the control unit 2 stores a preset value of the force of the joint of the lower limb, and compares whether the force of the joint of the lower limb with the control unit 2 meets the preset value of the force of the joint of the lower limb , if not, a message will be displayed indicating that the load on the joints of the lower limbs is abnormal, further modify the pedaling force or adjust the resistance provided by the resistance device. For example, when an athlete steps on the pedals 12 with the soles of their feet, there is a situation where the load on the joints of the lower limbs is too large. At this time, a message is displayed in real time to notify the athlete to ask the athlete to slow down the pedaling speed or reduce the resistance value of the resistance device.

In addition, the control unit 2 of this embodiment stores a pair of preset values of the pedaling action of the corresponding lower limb joints, and the control unit 2 compares whether the pedaling motion of the lower limb joints meets the preset value of the pedaling motion of the corresponding lower limb joints , if it does not match, a message will be displayed indicating that the load of the pedaling action is abnormal, and the pedaling action should be further corrected. For example, when the athlete steps on the pedals 12 with the soles of their feet, the pedaling action of the joints of the lower limbs is too large. At this time, a message is displayed in real time to notify the athlete, asking the athlete to reduce the pedaling action.

The power detector 125 set in this embodiment can achieve the same as in the aforementioned first embodiment, the pedaling load is abnormal, the pedaling force of both feet is not evenly distributed, and the judgment of whether to stop pedaling can be achieved, and can be borrowed by the angle detector 14. The detected part 131 is detected by the rotation of the turntable 13, and then the position signal of the rotation angle is obtained, and can cooperate with the telecommunication signal of the force detector 125 to judge the abnormal load of the joints of the lower limbs and the abnormal load of the pedaling action, and further reach the human body. Expansion of kinematics detection function.

Please refer to Fig. 7, Fig. 12 to Fig. 13, it is the fourth embodiment of the present invention, is based on the flow framework of the aforementioned third embodiment, and further changes the force detector 125 on the pedal 12 to The appearance of the first embodiment, that is, as shown in Figure 2, the present embodiment is provided with the front side force detector 121 and the rear side force detector 122 as the first embodiment on the pedal 12, and as shown in the figure As shown in 12, the front side force detector 121 and the rear side force detector 122 of each pedal 12 are electrically connected to the control unit 2, and the process shown in Figure 13 can also be used in this embodiment. It has the functions of the first embodiment and the third embodiment.

Please refer to Fig. 7, Fig. 12 and Fig. 14, which is the fifth embodiment of the present invention, which is also based on the flow structure of the aforementioned third embodiment, further changing the power detector 125 on the pedal 12 to Like the aspect of the second embodiment, that is, as shown in FIG. 5 , the present embodiment is provided with a left side force detector 123 and a right side force detector 124 as in the second embodiment on the pedal 12, and as shown in FIG. As shown in FIG. 12, the front side power detector 121 and the rear side power detector 122 of each pedal 12 are electrically connected to the control unit 2, and the process shown in FIG. 14 can be used in this embodiment. It has the functions of the second embodiment and the third embodiment.

Please refer to Fig. 7, Fig. 15 to Fig. 16, it is the sixth embodiment of the present invention, is based on the flow framework of the aforementioned third embodiment, and further changes the power detector 125 on the pedal 12 to Similar to the first embodiment, but still different from the first embodiment, as shown in Figure 15, the present embodiment is provided with a front side force detector 126, a front side force detector 126 on the pedal 12. Detector 127 and rear side force detector 128, and as shown in Figure 16, the front side force detector 126 of each pedal 12, the front side force detector 127 and the rear side force detector 128 all It is electrically connected with the control unit 2.

In this embodiment, besides having the functions of the first embodiment and the third embodiment, two force detectors such as a front force detector 126 and a front force detector 127 are provided on the front side of the pedal 12. The measuring device can further judge the pedaling force on the left and right sides of the front of the foot when the pedal 12 is stepped on, so that the pedaling posture and pedaling force of the sole of the foot on the pedal 12 can be measured more accurately, so that the control unit 2 It is more precise and accurate when comparing the pedaling force value with the preset value.

The disclosure of the above-mentioned embodiments is used to illustrate the present invention, not to limit the present invention, so any changes in numerical values or replacement of equivalent elements should still fall within the scope of the present invention.

From the above detailed description, those who are familiar with this art can understand that the present invention can indeed achieve the aforementioned purpose, and it has met the requirements of the Patent Law, so a patent application is proposed.

Claims (9)

1. a kind of method detected and prompt human body lower limbs trample action, there is the sportswear of pedal applied to the right and left Put, and stampede power is detected when pedal is trampled, it is characterised in that it is in respectively setting at least one on the pedal that this, which states method, The strength detector of stampede power is detected, the pedal of telecontrol equipment the right and left is trampled in turn in the sole of sporter's both feet When, detect by the strength detector of at least one detecting stampede power set by the respectively pedal and produce an at least telecommunications and interrogate Number, and an at least telecommunication signals are transmitted to a control unit and are converted to pedal force value, and compared and be somebody's turn to do with the control unit Whether pedal force value meets a preset value being stored in the control unit, or the difference number of the difference of the pedal force value, The show message when not meeting；

Wherein, respectively the pedal links a rotating disk being hubbed in telecontrol equipment, and angle detection device, and this turn are set in the rotating disk Disk to should angle detection device be provided be detected portion, sporter is back and forth trampled in the respectively pedal with sole, and detectd with the angle The position signal that device measures the rotational angle of the rotating disk is surveyed, the control unit calculates the institute of the sole of sporter with the position signal In position.

2. detecting according to claim 1 and the method for prompting human body lower limbs trample action, it is characterised in that described to trample Force for the pedal force value of at least strength detector detecting gained of each pedal summation, respectively the pedal step on Legpower value is individually compared with the preset value of the control unit, to judge that the summation of each pedal force value of the pedal is It is no to meet corresponding preset value, the show message if not meeting.

3. it is according to claim 2 detecting and prompting human body lower limbs trample action method, it is characterised in that further by The control unit calculates the difference of pedal force value when two pedal is trampled in turn, and the difference is stored in the control unit The difference number of value, and compare whether the difference meets the difference number, the show message if not meeting with the control unit.

4. detecting according to claim 1 and the method for prompting human body lower limbs trample action, it is characterised in that respectively this is foot-operated Plate sets an at least front side strength detector at front end, and sets an at least rear side strength detector in the respectively pedal rear end, The pedal force of an at least front side strength detector and at least rear side strength detector detecting gained is compared with the control unit Whether the difference of amount meets the difference number, the show message if not meeting.

5. detecting according to claim 1 and the method for prompting human body lower limbs trample action, it is characterised in that respectively this is foot-operated Plate sets an at least left side strength detector at left side, and respectively place sets an at least right side strength detector on the right side of the pedal, Comparing an at least left side strength detector with the control unit, at least a right side strength detector detects trampling for gained with this Whether the difference of strength meets the difference number, the show message if not meeting.

6. detecting according to claim 1 and the method for prompting human body lower limbs trample action, it is characterised in that the pedal force Value detects the pedal force of the summation, the respectively pedal of the pedal force value of gained for a few strength detector for the respectively pedal Value is individually compared with the preset value of the control unit, to judge whether the summation of the respectively pedal force value of the pedal accords with The preset value is closed, the show message if not meeting.

7. it is according to claim 2 detecting and prompting human body lower limbs trample action method, it is characterised in that further by The control unit calculates the difference of stampede power when two pedal is trampled in turn, and stores the difference in the control unit Difference number, and compare whether the difference meets the difference number, the show message if not meeting with the control unit.

8. detecting according to claim 1 and the method for prompting human body lower limbs trample action, it is characterised in that respectively this is foot-operated Plate sets an at least front side strength detector at front end, and sets an at least rear side strength detector in the pedal rear end, with The control unit compares the stampede power of an at least front side strength detector and at least rear side strength detector detecting gained Difference whether meet difference number, the show message if not meeting.

9. detecting according to claim 1 and the method for prompting human body lower limbs trample action, it is characterised in that respectively this is foot-operated Plate sets an at least left side strength detector at left side, and place sets an at least right side strength detector on the right side of the pedal, with The control unit compares the pedal force of an at least left side strength detector and an at least right side strength detector detecting gained Whether the difference of amount meets the difference number, the show message if not meeting.