JP3224757B2 - Power assist cycle performance test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved technique of a performance test apparatus for a power assist cycle.

[0002]

2. Description of the Related Art In recent years, in bicycles, power assist cycles that assist the pedal force when the load applied to the pedals on an uphill or the like becomes large have become widespread. An independent air cylinder is connected to the left and right pedals, and the pedals are alternately reciprocated by a sequencer or the like to achieve pedaling. Devices for performing analysis are known.

[0003]

However, in the above-described performance test apparatus, large equipment such as a stirrer is required to hold the air cylinder, so that not only the system becomes large-scale, but also both pedal shafts are required. Since it is necessary to connect the air cylinders, there is a problem that it takes time to set up the test. Also, the method of simply reciprocating the air cylinder is different from the operation of actually stepping on the pedal by a person riding on the air cylinder, and a difference in simulated conditions makes it impossible to perform an accurate performance test.

Further, when an air cylinder is used, it is difficult to finely adjust the operating torque and the speed, etc. Further, in order to smoothly perform the cranking of 180 degrees, basically the pedaling force and the driving wheels are applied. Since it is necessary to match the load, there is a problem that the performance test can be performed only at a certain speed while the load of the drive wheel is kept constant, and the test at other speeds cannot be performed.

Accordingly, the present invention enables testing under the same conditions as when a real person steps on a pedal while riding, and enables performance testing at all speeds, as well as miniaturizing the apparatus. It is an object of the present invention to provide a power assist cycle performance test apparatus with a small number of setup steps during a test.

[0006]

In order to achieve the above object, according to the present invention, a servo motor is connected to a drive shaft of a power assist cycle, and the servo motor is driven and controlled by an output computer. A chassis dynamometer was brought into contact with the driving wheels of the assist cycle, and data measured by the chassis dynamometer was analyzed by an input computer.

Here, the drive control of the servo motor by the output computer is performed by setting initial conditions such as a rim diameter and a gear ratio, operating conditions such as a crank speed and a torque applied to a drive shaft, and outputting a simulated signal. And control.
The data measured by the chassis dynamometer is, for example, data such as the rotational speed and torque of the drive wheels, and the measured data is analyzed by an input computer.

[0008] By controlling the drive of the servo motor by the output computer in this manner, it is possible to drive the servo motor by simulating, for example, a pedaling operation close to actual running, and perform a performance test or the like under conditions close to actual running. I can do it. In addition, it is possible to simulate constant speed or simulate constant torque to perform a test. Furthermore, when connecting the servo motor to the drive shaft, it is only necessary to connect the servo motor to one side of the drive shaft, so the test setup man-hour can be reduced, and the equipment can be downsized compared to the conventional pair of air cylinders. It becomes possible.

According to the present invention, the load of the chassis dynamometer is controlled by the output computer. If a matching is provided between the torque applied to the drive shaft and the load of the chassis dynamometer, performance tests at all speeds can be properly performed.

According to a third aspect of the present invention, a torque meter is provided between the servomotor and the drive shaft, and data measured by the torque meter is sent to an input computer. By analyzing the data measured by the torque meter and the data measured by the chassis dynamometer together, it is possible to perform a power assist cycle-specific performance test such as an assist ratio and control characteristics.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a system schematic diagram of a power assist cycle performance test apparatus according to the present invention, and FIG. 2 is a flowchart showing an example of a test program.

The performance test apparatus according to the present invention tests the performance of a power assist cycle in which a driving force assisting means is attached to a bicycle and the pedaling force is assisted by the driving force assisting means when the load on the pedal increases. The device is configured as a device for testing durability and the like, and can be tested under conditions close to actual running or under various conditions.

That is, as shown in FIG.
AC servomotor 1 connected to drive shaft (pedal) Ca of power assist cycle C via torque meter 2
A chassis dynamometer 3 that contacts the drive wheels Cr of the power assist cycle C; and a torque meter 4 that measures the torque of the chassis dynamometer 3. The servo motor 1 has an output computer 6 via a driver 5. And an input computer 8 is connected to the chassis dynamometer 3 via a chassis bench 7.

The output computer 6 can control the servomotor 1 via the driver 5, and can control the chassis dynamometer 3 via the chassis bench 7.
Is designed to be able to input signals sent from the chassis dynamometer 3 and the torque meters 2, 4, and the like.

The control procedure and the like in the above system configuration will be described with reference to FIG. The output computer 6 sets initial conditions such as a rim diameter and a gear ratio, and selects an operation mode. Here, the operation modes are classified into a servo operation mode for controlling the servo motor 1 and a dynamo operation mode for controlling the chassis dynamometer 3.

In the servo operation mode, for example, ATR control for controlling the torque to be constant or pedaling control for simulating the actual pedaling operation can be selected. In the dynamo operation mode, for example, the ASR control for controlling the speed to be constant can be selected. Control, ATR control for controlling the torque to be constant, or ALR control for controlling the load of the chassis dynamo 3 can be selected.

When the initial condition setting and the mode selection are completed, the calculation of each parameter is performed, and the output of the control signal and the fine adjustment are performed.

On the other hand, in the input computer 8, initial conditions such as a torque sensor voltage (a voltage proportional to the pedal input torque is output) are set, and input signals sent from the chassis dynamometer 3, the torque meters 2, 4 and the like are set. After each parameter is processed, the measured value is displayed, and it is exchanged with the output computer 6 to check whether or not the intended control is being performed, and feedback is provided. Then, the measurement data is stored as needed.

Here, the display of the measured value of the input computer 8 includes, for example, the temperature (° C.), the rotation speed of the drive shaft (rp)
m), vehicle speed (km / h), dynamo torque (N), drive shaft torque (N), input power (W), output power (W), sensor voltage (v), assist current (A), assist ratio ( Output power / input power minus 1).

When the data is stored and the test is completed, the output of the control signal from the output computer 6 is stopped, and the measurement analysis by the input computer 8 is completed.

By outputting a simulation signal close to the actual pedaling operation with the servo motor 1 by the above-described method, for example, a performance test or the like suitable for actual running can be performed. Further, since the load of the chassis dynamometer 3 can be controlled by the output computer 6, matching with the torque applied to the drive shaft Ca can be achieved in all speed ranges. Further, by connecting the servo motor 1 to the drive shaft Ca, the device configuration can be reduced in size as compared with the related art, and the number of setup steps can be reduced.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as that described in the claims of the present invention and exhibiting the same effects are included in the technical scope of the present invention. For example, the input computer 8 and the output computer 6 may be the same computer, and setting of initial conditions, selection of an operation mode, and the like are optional.

[0023]

As described above, the performance test apparatus of the present invention
As in claim 1, the drive shaft of the power assist cycle is driven by a servo motor that is driven and controlled by an output computer, and measurement data of a chassis dynamometer abutting on a drive wheel of the power assist cycle is analyzed by an input computer. Therefore, for example, it is possible to drive the servomotor by simulating a pedaling operation close to the actual running, and perform a performance test or the like under conditions suitable for the actual running. Also, when connecting the servo motor to the drive shaft,
Since it is necessary to connect only one side of the drive shaft, the size of the equipment can be reduced, and the number of setup steps for testing and the like can be simplified.

Further, if the load of the chassis dynamometer is controlled by the output computer, the load of the chassis dynamometer matched with the rotation speed of the servomotor can be set. Performance tests at speed can be performed. According to a third aspect of the present invention, a torque meter is provided between the servo motor and the drive shaft, and data measured by the torque meter is sent to an input computer.
A performance test peculiar to the power assist cycle can be effectively performed.

[Brief description of the drawings]

FIG. 1 is a system schematic diagram of a power assist cycle performance test apparatus according to the present invention.

FIG. 2 is a flowchart illustrating an example of a test program;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1: Servo motor, 2, 4: Torque meter, 3: Chassis dynamometer, 6: Output computer, C: Power assist cycle, Ca: Drive shaft, Cr: Drive wheel.

Continued on the front page (72) Inventor: Yuji Eto 1500, Hirakawa, Otsu-cho, Kikuchi-gun, Kumamoto Prefecture Inside Honda Motor Co., Ltd. (56) References JP-A-8-313373 (JP, A) JP-A-22-1604 (JP, A) JP-A-8-292133 (JP, A) JP-A-6-14945 (JP, A) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) G01M 17/007 G01L 3/00

Claims (3)

(57) [Claims] 1. A servo motor connected to a drive shaft of a power assist cycle, an output computer for driving and controlling the servo motor, a chassis dynamometer abutting on a drive wheel of the power assist cycle, and measurement by the chassis dynamometer. A power assist cycle performance test apparatus, comprising: an input computer for analyzing the data obtained. 2. The performance test apparatus for a power assist cycle according to claim 1, wherein the output computer comprises:
A power assist cycle performance test apparatus, wherein a load of the chassis dynamometer can be controlled. 3. The power assist cycle performance test apparatus according to claim 1, wherein a torque meter is provided between the servo motor and the drive shaft, and data measured by the torque meter is provided. A power assist cycle performance testing device, wherein the performance test device is sent to the input computer.