JPH10293087A - Shift operation evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To agree with a sensory evaluation by detecting a vibration when a shift operation mechanism is operated, comparing a vibration level with a reference waveform and separating a waveform for each judgment element, and comparing the area with the reference waveform and obtaining a judgment value for each judgment element. SOLUTION: An operator 6 of a control stand 5 gives a shifting instruction to a hydraulic actuator 4 of a shift-operating mechanism. The vibration is detected by a load cell 41 that is a vibration sensor, its output is sent to an FFT analyzer 7 and a vibration level for each frequency is analyzed and displayed, and an analysis result is sent to a personal computer 8 and is displayed on a sense evaluation screen 10. A personal computer 8 compares it with the reference waveform of the judgment elements (for example, viscosity, hooking, and two-step shifting, and controllability) of shift operation being stored in a memory, a vibration level is subjected to waveform separation for each judgment element, and a reference waveform is compared with an area for each separated waveform. By obtaining a judgment value for each judgment element from the relationship of the area, the shift operation mechanism is evaluated to obtain an absolute sensory evaluation value.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operation evaluation device, and more particularly to a device for absolutely evaluating a shift operation of a vehicle transmission.

[0001]

2. Description of the Related Art Conventionally, shift operations have been performed by sensory evaluation by highly trained persons. An example of such a sensory evaluation is shown in Table 1 below.

[0002]

[Table 1]

[0003] That is, even a highly trained inspector,
In the case of a shift operation in which a shift failure such as “stickiness”, “stuck”, “entering two steps”, and “sense of moderation” is not recognized, a score of 10 is given, and all users are evaluated. A shift operation that causes a shift failure is evaluated as a score of five. The score of 5 or more is an evaluation level that can be tolerated when the transmission is shipped, for example.

[0004] On the other hand, when all users feel that the shift is inferior to poor shift, the score is evaluated as 4 and when it does not function as a shift operation mechanism at all, the score is evaluated as 1. It has become.

On the other hand, apart from the above-mentioned manual sensory evaluation, a relative evaluation method using an instrument is also employed.

FIG. 8 shows a conventional shift operation evaluation apparatus using such an instrument.
A gear control box 22 is mounted on the gear box. The gear control box 22 is connected to a shift lever 24 via a shift rod 23. The shift lever 24 is configured such that a shift knob 25 attached to the head thereof comes into contact with a protrusion 27 of a spring scale 26.

In such a shift operation evaluation apparatus, when the operator (inspector) shifts the shift knob 25 in the shift direction or the select direction as shown in FIG. 28 indicates the operation weight at that time.

In this case as well, as shown in FIG. 10, the shift judgment elements of "stickiness", "stuck", "entering two steps", and "moderation" are confirmed, and a comprehensive judgment is made.

[0009]

As described above, the sensory evaluator has a drawback that variations occur depending on persons in the evaluation by the sensory evaluator, and the evaluation of the shift operation by the instrument shown in FIG. I cannot judge it correctly.

For this reason, there is a problem that the evaluation itself often differs between the sensory evaluation by an expert and the evaluation by an instrument.

Therefore, an object of the present invention is to realize a shift operation evaluation apparatus in which the sensory evaluation and the evaluation by the instrument are stably matched.

[0012]

In order to achieve the above object, a shift operation evaluation apparatus according to the present invention includes a vibration sensor for detecting a vibration level of a shift operation mechanism at the time of a shift operation, and a plurality of vibration sensors for the shift operation. And a memory storing the shift determination element as a reference waveform, comparing the vibration level with the reference waveform, separating the waveform for each shift determination element, and comparing the area with the reference waveform to determine each shift determination element. And a calculation unit for calculating a value.

That is, when the shift operation mechanism is shifted, the shift vibration level at this time is detected by the vibration sensor. This vibration level is sent to the arithmetic unit, and compared with a plurality of reference waveforms, such as stickiness, stuck, two-step, and moderation, which are a plurality of shift determination factors related to the shift operation stored in the memory in advance.

As a result of this comparison, the vibration level is separated into waveforms for each shift determination element, and each separated waveform is compared with the reference waveform in the memory for the area.

The shift operation mechanism is evaluated by calculating and outputting a determination value for each shift determination element according to the magnitude relationship of the areas. This is an absolute sensory evaluation value.

The above-mentioned shift operation mechanism is constituted by a hydraulic actuator which automatically performs an operation based on an instruction from a control table, or is constituted by a manual operation mechanism.

Further, the calculation section can calculate a determination value obtained by integrating the determination values for each shift determination element.

[0018]

FIG. 1 shows an embodiment (1) of a shift operation evaluation device according to the present invention. In the drawing, reference numeral 1 denotes a transmission, and the transmission 1 has an input shaft 2 and a transmission shaft. An output shaft 3 is connected, the input shaft 2 is connected to an engine (not shown), and the output shaft 3 is connected to wheels (not shown).

Reference numeral 4 denotes a hydraulic actuator as a shift operation mechanism, and a load cell 5 as a vibration sensor.
1 is provided. An instruction for a shift operation is given to the hydraulic actuator 4 by an operator 6 located on a control board 5.

That is, the operator 6 sitting in front of the control board 5 does not need to be the above-mentioned sensory evaluator.
Only the instruction of the shift operation shown in FIG.

The output signal of the load cell 41 is sent to the FFT analyzer 7, and the display unit (not shown) analyzes and displays the vibration level with respect to the frequency.

The analysis result of the FFT analyzer 7 is given to the personal computer 8 and displayed on the sensory evaluation screen 10 thereof.

The operator 6 evaluates the shift operation based on the frequency analysis result.

FIG. 2 shows an embodiment of the hydraulic actuator 4 shown in FIG. 1. The hydraulic unit 42 receives a command in the select direction (see FIG. 10) from the control base 5.
And a hydraulic unit 43 that receives a command for a shift direction (see FIG. 10) from the control base 5 and a combining unit 44 for combining the shift direction and the select direction to perform a shift operation as illustrated. ing.

In the above embodiment, the shift operation is automatically performed using a hydraulic actuator as the shift operation mechanism. However, as in the embodiment shown in FIG. 3, the operator 10 manually operates the shift lever 11 and The vibration level at that time may be given from the load cell 13 to the FFT analyzer 7.

The operation of the above embodiment will be described below. First, in either the embodiment of FIG. 1 or the embodiment of FIG. 3, when a shift operation is performed, a vibration level signal is output from the load cell 13 and input to the FFT analyzer 7, and a time axis signal is converted to a frequency axis signal. And is given to the personal computer 8.

FIG. 4 shows a flowchart of a calculation program for evaluating a shift operation executed by the personal computer 8. In this program, it is necessary to set and save data in advance before the following evaluation calculation. That is, when the program starts (step S1), first, a data file name is set and written (step S2), and then a data file is read (step S3).

This data file is reference waveform (source waveform) data, and includes “stickiness”, “jagging”, “two steps”, and “moderation” as shift determination factors.
The reference waveform shown in FIG. 5 is as shown in FIG. 5, and is displayed on the screen of the personal computer 8 (step S4).

In FIG. 5, for convenience of illustration, the FFT
The amplitude value of the load sensor 41 (or 13) is displayed as an analog signal by returning to the time axis instead of the frequency axis as the output signal of the analyzer 7. Therefore, the FFT analyzer 7 need not be used as long as the waveform can be analyzed in this way.

Thereafter, the waveform signal of the vibration level from the load sensor 41 (or 13) is separated into waveforms for each shift determination element, and the area of each separated waveform is obtained (step S5).

For this waveform separation, it is possible to use, for example, the point that the frequency spectrum of each shift determination element is different. That is, since the frequency spectrum of each shift determination element is different, a waveform similar to each of the reference waveforms in FIG. 5 can be obtained by dividing each band by filter processing.

An evaluation point is calculated for each waveform of each shift determination element obtained in this way. That is, first, when the detected waveform is “sticky” (step S6), the area is compared with the area of the reference waveform (reference area) (step S61). In addition,
The reference area may be set by characteristically extracting a peak waveform portion in the reference waveform as shown in FIGS. 6 (1) to 6 (4).

When the area is smaller than the reference area, the evaluation points are set to 6 to 10 points (step S62), when they are the same, the evaluation points are set to 5 points (step S63), and when they are larger, the evaluation points are set to 1 to 4 points (step S64). ) A stickiness evaluation point is obtained (step S65).

Next, when the detected waveform is "stuck" (step S7), the area is compared with the area of the reference waveform (reference area) (step S71). (Step S72) When they are the same, the evaluation point is set to 5 points (Step S73), and when they are large, the evaluation points are set to 1 to 4 points (Step S74), and the stickiness evaluation point is obtained (Step S75).

If the detected waveform is "takes two steps" (step S8), the area is compared with the area of the reference waveform (reference area) (step S81). In step S82, when the values are the same, the evaluation points are set to 5 points (step S83), and when they are large, the evaluation points are set to 1 to 4 points (step S84), and the stickiness evaluation points are obtained (step S85).

Further, when the detected waveform is "moderation" (step S9), the area is compared with the area of the reference waveform (reference area) (step S91). (Step S92) When the values are the same, the evaluation points are set to 5 points (Step S93), and when they are large, the evaluation points are set to 1 to 4 points (Step S94), and the stickiness evaluation points are obtained (Step S95).

The evaluation points thus obtained for each shift determination element are totaled (step S10). Then, the total score is set as an overall evaluation score (step S11), and the overall evaluation score is classified (step S12).

That is, when the total evaluation score is 19 or less, the judgment value is 1-4 (step S13), when the score is 20, the judgment value is 5 (step S14), and when the score is 21 or more, the judgment value is 6 The score is set to 10 to 10 (step S15).

The comprehensive evaluation is performed using the personal computer 8
Is displayed on the evaluation screen 9. FIG. 7 shows a radar chart.

[0040]

As described above, according to the shift operation evaluation apparatus of the present invention, the vibration level of the shift operation mechanism at the time of the shift operation is detected, and this vibration level is compared with the reference waveform to make each shift operation. The configuration is such that the waveform is separated for each judgment element and the judgment value for each shift judgment element is calculated by comparing the area with the reference waveform of a plurality of shift judgment elements. This makes it possible to evaluate the shift operation in a stable manner, thereby making it possible to match the absolute sensory evaluation with the instrument evaluation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a shift operation evaluation device according to the present invention.

FIG. 2 is a view showing an embodiment of a hydraulic actuator used in the shift operation evaluation device according to the present invention.

FIG. 3 is a block diagram showing another embodiment of the shift operation evaluation device according to the present invention.

FIG. 4 is a flowchart illustrating a shift operation evaluation program executed by a personal computer in the shift operation evaluation device according to the present invention.

FIG. 5 is a graph showing a reference waveform of each shift determination element.

6 is a graph showing a characteristic reference waveform portion including a peak in the reference waveform shown in FIG. 5;

FIG. 7 is a radar chart showing an overall evaluation by the shift operation evaluation device according to the present invention.

FIG. 8 is a block diagram showing a shift operation evaluation instrument according to a conventional example.

FIG. 9 is a diagram for explaining a shift operation direction.

FIG. 10 is a block diagram showing a general concept of conventional shift operation evaluation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission 2 Input shaft 3 Output shaft 4 Hydraulic actuator 13,41 Load cell 5 Control stand 7 FFT analyzer 8 Personal computer 9 Evaluation screen 11 Shift lever In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (5)

[Claims] A shift sensor for detecting a vibration level of a shift operation mechanism at the time of a shift operation, a memory storing a plurality of shift determination elements related to the shift operation as a reference waveform, and comparing the vibration level with the reference waveform. A shift operation evaluation device, comprising: a calculation unit that separates a waveform for each shift determination element and compares the area with the reference waveform to calculate a determination value for each shift determination element. 2. The shift operation evaluation device according to claim 1, wherein the shift determination elements are stickiness, stuck, two-step, and moderation. 3. The shift operation evaluation device according to claim 1, wherein the shift operation mechanism is constituted by a hydraulic actuator that automatically performs the operation based on an instruction from a control board. 4. The shift operation evaluation device according to claim 1, wherein the shift operation mechanism is constituted by a manual operation mechanism. 5. The shift operation evaluation device according to claim 1, wherein the calculation unit calculates a determination value obtained by integrating the determination values for each shift determination element.