CN112078702A - Gear tooth ratio detection method and device - Google Patents
Gear tooth ratio detection method and device Download PDFInfo
- Publication number
- CN112078702A CN112078702A CN202010847916.6A CN202010847916A CN112078702A CN 112078702 A CN112078702 A CN 112078702A CN 202010847916 A CN202010847916 A CN 202010847916A CN 112078702 A CN112078702 A CN 112078702A
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- bicycle
- gear tooth
- tooth ratio
- gear
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J50/00—Arrangements specially adapted for use on cycles not provided for in main groups B62J1/00 - B62J45/00
- B62J50/20—Information-providing devices
- B62J50/21—Information-providing devices intended to provide information to rider or passenger
- B62J50/22—Information-providing devices intended to provide information to rider or passenger electronic, e.g. displays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
- B62J45/40—Sensor arrangements; Mounting thereof
- B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
- B62J45/40—Sensor arrangements; Mounting thereof
- B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
- B62J45/412—Speed sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
Abstract
The invention provides a gear tooth ratio detection method and a device, wherein the method comprises the following steps: after the gear teeth numbers of the bicycle chain wheel and the flywheel are obtained, calculating a gear tooth ratio sequence of the vehicle according to the gear teeth numbers of the bicycle chain wheel and the flywheel; receiving the current speed and the pedaling frequency data of the bicycle through a code table, and if the pedaling frequency data are judged to be stable, calculating the gear tooth ratio of the bicycle according to the current speed and the pedaling frequency data of the bicycle; and comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle, and displaying the gear tooth ratio of the vehicle and the current gear on a code table. Through the scheme, the problem that the existing gear tooth ratio is too high in detection cost is solved, the gear tooth ratio detection display cost can be reduced, and the accuracy of gear tooth ratio detection calculation is guaranteed.
Description
Technical Field
The invention relates to the field of mechanical speed change of bicycles, in particular to a gear tooth ratio detection method and a gear tooth ratio detection device.
Background
The gear tooth ratio is a direct reflection of the combination of the vehicle speed change and the chain wheel flywheel, and for a bicycle rider, the pedaling frequency is maintained in an optimal interval through the speed change, so that the phenomenon that the pedaling frequency is too low to cause labor waste or even damage to knees and muscles is avoided, and the phenomenon that extra physical power is consumed due to the fact that the pedaling frequency is too high is avoided. Meanwhile, the selection of the chain wheel and the flywheel in the speed change can also influence the abrasion of the chain to the gear teeth. In view of the impact of different gear tooth ratio configurations on the ride performance of riders, it is necessary to know the current gear tooth ratio and the sprocket set during riding.
At present, the gear tooth ratio is displayed on a stopwatch by a common method through data communication of an electronic transmission, and the price of the electronic transmission generally reaches ten thousand yuan, so that the display cost is too high and the electronic transmission is difficult to popularize.
Disclosure of Invention
In view of this, embodiments of the present invention provide a gear tooth ratio detection method and device to solve the problem of the existing gear tooth ratio detection display cost being too high.
In a first aspect of embodiments of the present invention, there is provided a method, comprising:
after the gear teeth numbers of the bicycle chain wheel and the flywheel are obtained, calculating a gear tooth ratio sequence of the vehicle according to the gear teeth numbers of the bicycle chain wheel and the flywheel;
receiving the current speed and the pedaling frequency data of the bicycle through a code table, and if the pedaling frequency data are judged to be stable, calculating the gear tooth ratio of the bicycle according to the current speed and the pedaling frequency data of the bicycle;
and comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle, and displaying the gear tooth ratio of the vehicle and the current gear on a code table.
In a second aspect of embodiments of the present invention, there is provided an apparatus, comprising:
the first calculation module is used for calculating a gear tooth ratio sequence of the vehicle according to the gear tooth numbers of the bicycle chain wheel and the flywheel after the gear tooth numbers of the bicycle chain wheel and the flywheel are obtained;
the second calculation module is used for receiving the current speed and the pedaling frequency data of the bicycle through the code table, and if the pedaling frequency data is judged to be stable, calculating the gear tooth ratio of the bicycle according to the current speed and the pedaling frequency data of the bicycle;
and the display module is used for comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle and displaying the gear tooth ratio of the vehicle and the current gear on the code table.
In a third aspect of the embodiments of the present invention, there is provided an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method according to the first aspect of the embodiments of the present invention.
In a fourth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method provided in the first aspect of the embodiments of the present invention.
In the embodiment of the invention, the gear tooth ratio sequence of the vehicle is calculated based on the gear tooth numbers of the bicycle chain wheel and the flywheel; receiving the current speed and the frequency data of the bicycle, and calculating the gear ratio of the bicycle according to the current speed and the frequency data of the bicycle; and comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle, and displaying the gear tooth ratio of the vehicle and the current gear on a code table. Therefore, the problem that the cost of detecting and displaying the gear tooth ratio through the electronic transmission is overhigh is solved, the detection cost can be reduced under the existing product framework, extra hardware equipment is not needed to be added, the detection and identification accuracy rate is high, and the gear tooth ratio and other related information can be conveniently and visually provided for a user.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a gear tooth ratio detection method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a gear tooth ratio detection method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a gear tooth ratio detection device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons skilled in the art without any inventive work shall fall within the protection scope of the present invention, and the principle and features of the present invention shall be described below with reference to the accompanying drawings.
The terms "comprises" and "comprising," when used in this specification and claims, and in the accompanying drawings and figures, are intended to cover non-exclusive inclusions, such that a process, method or system, or apparatus that comprises a list of steps or elements is not limited to the listed steps or elements.
Referring to fig. 1, fig. 1 is a schematic flow chart of a gear tooth ratio detection method according to an embodiment of the present invention, including:
s101, after the gear teeth of a bicycle chain wheel and a flywheel are obtained, calculating a gear tooth ratio sequence of a vehicle according to the gear teeth of the bicycle chain wheel and the flywheel;
and obtaining the gear tooth numbers of the bicycle chain wheel and the flywheel through a data input or prerecording mode, and calculating a gear tooth ratio sequence according to the gear tooth numbers of the chain wheel and the flywheel. The number of teeth of the gear refers to the number of protrusions which are used for being meshed with the chain on the chain wheel or the flywheel, namely the number of teeth of the gear.
The cog ratio sequence refers to, for a particular crankset, according to the formula: and presetting a gear tooth ratio sequence, namely the tooth number of the toothed disc/the tooth number of each flywheel, so that the gear tooth ratio sequence of each toothed disc can be obtained.
S102, receiving the current speed and the frequency data of the bicycle through a code table, and if the frequency data are judged to be stable, calculating the gear tooth ratio of the bicycle according to the current speed and the frequency data of the bicycle;
it will be appreciated that by mounting the speed sensor and the cadence sensor on the bicycle, the speed and cadence of the bicycle can be obtained. The general code table receives the speed and frequency data transmitted by the speed sensor and the frequency sensor, and then the code table can calculate the current gear ratio of the vehicle according to the current speed and frequency of the bicycle.
Specifically, the vehicle gear tooth ratio is calculated according to the following formula:
I＝60×v÷t÷r； (1)
where I denotes a gear tooth ratio of the vehicle, v denotes a current speed (mm/s) of the bicycle, t denotes a current pedaling frequency (rpm), and r denotes a wheel diameter (mm).
The step frequency data stability determination unit may determine that the step frequency data is stable according to a change of the step frequency data within a preset time interval being smaller than a preset threshold, or determine that a fluctuation of the step frequency data within a preset driving distance is smaller than the preset threshold, which is not limited herein.
The gear tooth ratio refers to the ratio of the tooth number of the toothed disc to the tooth number of the flywheel.
S103, comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle, and displaying the gear tooth ratio of the vehicle and the current gear on a code table.
And comparing the calculated gear tooth ratio of the vehicle with a gear tooth ratio sequence, taking the chain wheel and the flywheel corresponding to the value closest to the gear tooth ratio of the current vehicle in the gear tooth ratio sequence as the currently used chain wheel and flywheel, and taking the number of the corresponding flywheel as the current gear of the bicycle.
Fig. 2 is a schematic diagram of a gear tooth ratio detection method, which is to calculate a gear tooth ratio of a vehicle based on data collected by a speed sensor and a frequency sensor, query and compare the gear tooth ratio from a gear tooth ratio list of a bicycle, determine a corresponding gear, and display the gear tooth ratio and the gear on a code table.
In another embodiment of the invention, taking the more common 52-36 cranks and 11-28 flywheel 2 x 11 speed change system of a road bicycle as an example:
the tooth disc has the following teeth number: 36. 52;
flywheel tooth number: 28. 25, 23, 21, 19, 17, 15, 14, 13, 12, 11;
then 36 chain wheel preset gear ratio sequence:
1.29、1.44、1.57、1.71、1.89、2.12、2.40、2.57、2.77、3.00、3.27；
52 tooth disc preset gear tooth ratio sequence:
1.86、2.08、2.26、2.48、2.74、3.06、3.47、3.71、4.00、4.33、4.73；
if the riding time code table receives the speed of 31.0km/h (8611mm/s) and the pedaling frequency is 90rpm, then:
real-time gear tooth ratio (60 × speed (mm/s)/step frequency (rpm)/wheel diameter (mm)
＝60*8611/90/2096＝2.74。
The 5 th flywheel for the 2 nd disc currently being used can be determined against the values in the sequence of preset gear ratios. (the sequence here is from inside to outside, for example, for the front chain wheel, the 1 st is the one with the smallest number of teeth; for the rear flywheel, the 1 st is the one with the largest number of teeth).
It will be appreciated that in a conventional bicycle the chain is straight and fits over the front and rear cogs, with little friction between the chain and the cogs. And because the additional wearing and tearing can be brought because the gear shift on road bicycle's the bicycle that takes the derailleur, for example the combination of 1 st chain wheel + 6 th flywheel, the degree of inclination of chain is very obvious, consequently, can show the degree of inclination of current gear on the stopwatch screen.
Preferably, the sequence number of the chain wheel and the flywheel corresponding to the current gear of the bicycle is determined, the difference between the absolute values of the sequence number of the chain wheel and the sequence number of the flywheel is compared with a preset value, the inclination degree of the chain is judged, and the judgment result of the inclination degree of the chain is displayed.
Illustratively, for the gear tooth ratio obtained by detection and calculation, the corresponding gear is found through a gear tooth ratio-gear comparison table, judgment is carried out based on the gear, and the inclination degree is divided into a large gear and a small gear. Specifically, the current sequence number (the sequence number refers to the number of the second) of the crankset and the flywheel is determined, if the absolute value of the difference between the two sequence numbers is less than or equal to 3, the inclination degree is small, if the absolute value is greater than 3, the inclination degree is large, and finally, the obtained inclination degree judgment result is displayed on a screen for a user to refer to.
In riding, when detecting the frequency of pedaling and the speed, the equivalent of the frequency of pedaling, the speed, the riding time and the distance can be recorded, data is uploaded to intelligent terminal equipment such as a mobile phone of a user through wireless connection modes such as Bluetooth connection and wifi after riding is finished to be analyzed, and the functions of frequency-pedaling condition analysis and historical records are provided for the user.
And (3) analyzing the pedaling frequency:
the frequency of pedaling is significant for reflecting the motion situation. It is desirable for the rider to maintain the cadence in a stable and appropriate interval. When the pedaling frequency is too low, the labor is wasted, the knees are damaged, and the like, and when the pedaling frequency is too high, the physical power is consumed too fast, and the riding rhythm is influenced.
Therefore, the collected riding data is analyzed after riding, the pedaling frequency of the user in the whole riding process is displayed in a form of a statistical chart, the pedaling frequency comprises a pedaling frequency peak value and a pedaling frequency interval, and the interval is divided into three parts: high tread frequency, medium tread frequency, low tread frequency; the user is helped to adjust the distribution of physical strength and the balance of riding rhythm in the next riding;
history recording:
the riding data of each time is stored, when a new record comes in, the data of the travel, the average speed, the maximum speed, the average pedaling frequency and the like are compared, and the comparison result is expressed by increasing or decreasing percentage. Can conveniently check the progress of the user in the movement and places needing improvement
In this embodiment, can reduce the teeth of a cogwheel and compare and detect the demonstration cost, guarantee the teeth of a cogwheel and compare and detect discernment rate of accuracy, satisfy the function and the market demand of teeth of a cogwheel ratio.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 3 is a schematic structural diagram of a gear tooth ratio detection device according to an embodiment of the present invention, where the device includes:
the first calculating module 310 is configured to calculate a gear tooth ratio sequence of the vehicle according to the gear tooth numbers of the bicycle chain wheel and the flywheel after acquiring the gear tooth numbers of the bicycle chain wheel and the flywheel;
the second calculating module 320 is configured to receive the current speed and the frequency data of the bicycle through the code table, and if the frequency data of the bicycle is determined to be stable, calculate a gear tooth ratio of the vehicle according to the current speed and the frequency data of the bicycle;
wherein, the receiving the current speed and frequency data of the bicycle by the stopwatch further comprises:
a speed sensor and a pedaling frequency sensor are installed on a bicycle.
Specifically, the gear tooth ratio of the vehicle is calculated according to the formula (1):
I＝60×v÷t÷r； (1)
in the formula, I represents the gear tooth ratio of the vehicle, v represents the current speed of the bicycle, t represents the current pedaling frequency, and r represents the wheel diameter.
And the display module 330 is configured to compare the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determine a current gear of the bicycle, and display the gear tooth ratio of the vehicle and the current gear on the code table.
Specifically, if the calculated gear tooth ratio of the vehicle is approximately equal to a certain numerical value in the gear tooth ratio sequence, the chain wheel number and the flywheel piece number corresponding to the approximately equal numerical value in the gear tooth ratio sequence are obtained, and the current gear of the bicycle is determined based on the chain wheel number and the flywheel piece number.
Optionally, the display module 330 further includes:
and the inclination degree display unit is used for determining the sequential number of the chain wheel and the flywheel corresponding to the current gear of the bicycle, comparing the difference between the absolute values of the sequential number of the chain wheel and the sequential number of the flywheel with a preset value, judging the inclination degree of the chain and displaying the judgment result of the inclination degree of the chain.
It will be appreciated by those of ordinary skill in the art that in one embodiment, the electronic device includes a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing steps S101 to S103 to detect and display a current gear tooth ratio of the bicycle when executing the computer program.
Those skilled in the art will also understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program to instruct associated hardware, where the program may be stored in a computer-readable storage medium, and when the program is executed, the program includes steps S101 to S103, where the storage medium includes, for example: ROM/RAM, magnetic disk, optical disk, etc.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A gear tooth ratio detection method, comprising:
after the gear teeth numbers of the bicycle chain wheel and the flywheel are obtained, calculating a gear tooth ratio sequence of the vehicle according to the gear teeth numbers of the bicycle chain wheel and the flywheel;
receiving the current speed and the pedaling frequency data of the bicycle through a code table, and if the pedaling frequency data are judged to be stable, calculating the gear tooth ratio of the bicycle according to the current speed and the pedaling frequency data of the bicycle;
and comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle, and displaying the gear tooth ratio of the vehicle and the current gear on a code table.
2. The method of claim 1, wherein said receiving current bicycle speed and cadence data via a cycle computer further comprises:
a speed sensor and a pedaling frequency sensor are installed on a bicycle.
3. The method of claim 1, wherein if the step frequency data is determined to be stable, calculating the gear ratio of the vehicle based on the current speed of the bicycle and the step frequency data comprises:
calculating a vehicle gear tooth ratio according to equation (1):
I＝60×v÷t÷r； (1)
in the formula, I represents the gear tooth ratio of the vehicle, v represents the current speed of the bicycle, t represents the current pedaling frequency, and r represents the wheel diameter.
4. The method according to claim 1, wherein the step of comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence to determine the current gear of the bicycle comprises:
and if the calculated gear tooth ratio of the vehicle is approximately equal to a certain numerical value in the gear tooth ratio sequence, acquiring a chain wheel number and a flywheel piece number corresponding to the approximately equal numerical value in the gear tooth ratio sequence, and determining the current gear of the bicycle based on the chain wheel number and the flywheel piece number.
5. The method of claim 1, wherein said aligning the calculated gear ratios of the vehicle to the sequence of gear ratios to determine a current gear position of the bicycle and displaying the gear ratios of the vehicle and the current gear position on a code table further comprises:
determining the sequential number of the chain wheel and the flywheel corresponding to the current gear of the bicycle, comparing the difference between the absolute values of the sequential number of the chain wheel and the sequential number of the flywheel with a preset value, judging the inclination degree of the chain, and displaying the judgment result of the inclination degree of the chain.
6. A gear tooth ratio detection device, comprising:
the first calculation module is used for calculating a gear tooth ratio sequence of the vehicle according to the gear tooth numbers of the bicycle chain wheel and the flywheel after the gear tooth numbers of the bicycle chain wheel and the flywheel are obtained;
the second calculation module is used for receiving the current speed and the pedaling frequency data of the bicycle through the code table, and if the pedaling frequency data is judged to be stable, calculating the gear tooth ratio of the bicycle according to the current speed and the pedaling frequency data of the bicycle;
and the display module is used for comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence, determining the current gear of the bicycle and displaying the gear tooth ratio of the vehicle and the current gear on the code table.
7. The apparatus of claim 6, wherein said receiving current bicycle speed and cadence data via a cycle computer further comprises:
a speed sensor and a pedaling frequency sensor are installed on a bicycle.
8. The apparatus of claim 6, wherein if the step frequency data is determined to be stable, the step frequency data is used to calculate the gear ratio of the vehicle according to the current speed of the bicycle and the step frequency data as follows:
calculating a vehicle gear tooth ratio according to equation (1):
I＝60×v÷t÷r； (1)
in the formula, I represents the gear tooth ratio of the vehicle, v represents the current speed of the bicycle, t represents the current pedaling frequency, and r represents the wheel diameter.
9. The apparatus according to claim 6, wherein the comparing the calculated gear tooth ratio of the vehicle with the gear tooth ratio sequence determines that the current gear of the bicycle is specifically:
and if the calculated gear tooth ratio of the vehicle is approximately equal to a certain numerical value in the gear tooth ratio sequence, acquiring a chain wheel number and a flywheel piece number corresponding to the approximately equal numerical value in the gear tooth ratio sequence, and determining the current gear of the bicycle based on the chain wheel number and the flywheel piece number.
10. The apparatus of claim 6, wherein the display module comprises:
and the inclination degree display unit is used for determining the sequential number of the chain wheel and the flywheel corresponding to the current gear of the bicycle, comparing the difference between the absolute values of the sequential number of the chain wheel and the sequential number of the flywheel with a preset value, judging the inclination degree of the chain and displaying the judgment result of the inclination degree of the chain.
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| CN202010847916.6A CN112078702A (en) | 2020-08-21 | 2020-08-21 | Gear tooth ratio detection method and device |
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| CN202010847916.6A CN112078702A (en) | 2020-08-21 | 2020-08-21 | Gear tooth ratio detection method and device |
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| KR100892183B1 (en) * | 2008-10-17 | 2009-04-10 | 유병철 | Gear change apparatus of bicycle |
| CN104417648A (en) * | 2013-09-02 | 2015-03-18 | 昆山研达电脑科技有限公司 | Bicycle shifting remind system and method thereof |
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Application publication date: 20201215 |