Method and device for measuring occupant h-point and hand grip center point

Abstract

The application discloses a kind of passenger H point and hand grip center point measurement method, comprising the following steps: step 1, by action capture device acquisition experimental personnel marker point data and hip joint coordinate data;Step 2, according to hip joint coordinate data, calculate hip joint midpoint coordinates, as passenger H point coordinates;Step 3, according to the wrist point information of left and right hand obtained by action capture;Step 4, according to palm size conversion left and right hand palm coordinates;Step 5, according to palm coordinates, calculate hand grip center coordinates.The application can let experience personnel adjust comfortable sitting posture according to steering wheel seat three pedals, obtain passenger skeleton and marker point information by action capture system, convert passenger H point and hand grip center point, combine action capture system with vehicle, and carry out H point and hand grip center point fast, accurate, convenient measurement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a method and device for measuring occupant H point and hand grip center point. BACKGROUND

[0002] There are few methods and devices for measuring the hip point of actual personnel in the industry. The paper "Automobile Man-machine Space Layout Research Based on Chinese Body Driving Posture" of CARS proposes a method of obtaining the H point of the seated personnel by using a special scanner to scan the human body. This method has great limitations because the scanner needs to be scanned and special clothes need to be worn, and the scanning time is long. In addition, the hip point (H point) needs to be assisted by the human body toolkit in Ramsis.

[0003] Since the occupant H point and the hand grip center point are the most important parameters in the overall layout and man-machine engineering development process of the vehicle, the 95% occupant H point trajectory directly affects all aspects of the overall layout, including interior space, convenience of getting in and out, and convenience of operation. The current industry determines the 95th percentile occupant H point trajectory formula by using a large number of human body comfort sitting positions of Europeans and Americans in SAE statistics. However, the human body used is different from the Chinese body, and the SAE 95th percentile occupant H point trajectory formula is not suitable for the development of vehicles for the Chinese market. Using the SAE formula will make the actual Chinese personnel feel different from the design.

[0004] There is no clear positive design method for the 95th percentile occupant hand grip center point and the 5th percentile female occupant hand grip center in the industry, which is mostly obtained according to experience and benchmarking. However, the 95th percentile occupant hand grip center point and the 5th percentile female occupant hand grip center are crucial for the design of the steering wheel and directly affect the comfort of the arm.

[0005] Therefore, it is necessary to find a method for quickly and accurately measuring the H point, and the hand grip center point, which can adapt to the feeling state of Chinese personnel. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a method and device for accurately measuring the occupant H point and hand grip center point.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a method for measuring the occupant H point and hand grip center point, comprising the following steps:

[0008] Step 1: obtaining the marker point data and hip joint coordinate data of the experimental personnel by using a motion capture device;

[0009] Step 2: calculating the midpoint coordinate of the hip joint as the occupant H point coordinate according to the hip joint coordinate data.

[0010] Step 3, according to the action capture wrist point information of left and right hand obtained;

[0011] Step 4, according to the palm size conversion into left and right hand palm coordinates;

[0012] Step 5, according to the palm coordinates to calculate the hand grip center coordinates.

[0013] In step 1, before the coordinate data capture, the experimenters wear the motion capture device and adjust their positions, the motion capture device is provided with mark points at the center of left and right wrists and the center of left and right hip joints, and then the collected mark point data is transmitted to the motion capture software by the motion capture device.

[0014] In step 2, the real human body is abstracted as a human body skeleton model, and then the skeleton model is simplified as a model connected by important joints, and finally the left and right hip joint connecting lines are defined as the passenger crotch points.

[0015] In step 3, the palm is placed in the most comfortable position for holding the steering wheel, and the position of the steering wheel is adjusted according to the palm placement position.

[0016] The steps 1-5 are completed by a large number of personnel to perform the ride test, and the H point coordinates and hand grip center coordinates data of each passenger in each ride test are obtained.

[0017] The coordinate system of the motion capture device is consistent with the whole vehicle coordinate system in each ride test.

[0018] The H point coordinates and hand grip center coordinates data of each passenger are calculated in the same way:

[0019] The passenger H point coordinates = (the center coordinates of the left hip joint of the passenger + the center coordinates of the right hip joint of the passenger) / 2;

[0020] The hand grip center coordinates data = (the palm coordinates of the left hand of the passenger + the palm coordinates of the right hand of the passenger) / 2.

[0021] A device for measuring the H point and hand grip center point of a passenger, the device comprising an adjustable steering wheel, a seat and a pedal mechanism, a motion capture system, the motion capture system being connected and outputting the collected signals to a processing device, the processing device executing the measurement method of the H point and hand grip center point of the passenger as claimed in any one of claims 1-7.

[0022] The position of the adjustable steering wheel is adjusted according to the most comfortable orientation of the experimenters holding it, and the motion capture system and the seat are in a unified coordinate system.

[0023] The application can make the experience personnel adjust the comfortable sitting posture according to the steering wheel seat three pedals, acquire the passenger bone and marker point information through the motion capture system, convert the passenger H point and hand grip center point, combine the motion capture system with the vehicle, and measure the H point and hand grip center point quickly, accurately and conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0024] The content expressed in each drawing in the specification of the application and the marks in the drawings are briefly described as follows:

[0025] Figure 1 It is a schematic diagram of the measuring device of the passenger H point and hand grip center point;

[0026] Figure 2 It is a flow chart of the measuring method of the passenger H point and hand grip center point;

[0027] Figure 3 It is a human body bone - hip joint and wrist position diagram;

[0028] Figure 4 It is a human body model simplified diagram;

[0029] Figure 5 It is a motion capture generated marker point information diagram;

[0030] The marks in the above drawings are as follows: 1, adjustable steering wheel; 2, seat; 3, marker point; 4, wrist center; 5, left hip joint center; 6, right hip joint center. DETAILED DESCRIPTION

[0031] The specific embodiments of the application are further described in detail below with reference to the drawings, and the shape, structure, mutual position and connection relationship between the parts, the action and working principle of each part, the manufacturing process and the operation and use method of each component involved in the specific embodiments of the application are described in further detail, so as to help the person skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the application.

[0032] The measuring method of the passenger H point and hand grip center point is that the experimental personnel wear the motion capture equipment, adjust their own position, and after the driving posture of the experimental personnel is determined, the human body marker point 3 data collected by the motion capture marker equipment on the body of the experimental personnel is transmitted to the motion capture software, and the motion capture software outputs the human body marker point 3 data and joint coordinate data. In order to ensure the effect of the motion capture system, the positioner of the motion capture needs to be bound and fixed on the whole body. The binding and fixing position is as shown in Figure 1 The motion capture can select optical motion capture, inertial motion capture and integrated motion capture.

[0033] As shown in Figure 2 , the specific steps are as follows:

[0034] Step 1, obtain the passenger human body marker point 3 data and hip joint coordinate data through the motion capture device;

[0035] Step 2, calculate the hip joint midpoint (dummy crotch point) coordinate according to the hip joint coordinate data, which is the passenger H point coordinate;

[0036] Step 3, obtain the wrist point information of the left and right hands according to the motion capture;

[0037] Step 4, convert the palm size into the left and right hand palm coordinate;

[0038] Step 5, calculate the hand grip center coordinate according to the palm coordinate.

[0039] After a large number of personnel ride tests, the H point data and hand grip center data of each passenger are obtained. The motion capture system needs to be calibrated in advance to ensure that the coordinate system is consistent with the vehicle coordinate system.

[0040] It should be noted that the process of simulating the hip joint center as the human crotch point is as follows: the real human body is abstracted as a human skeleton model, and the skeleton model is simplified as a model of important joint connections, and the left and right hip joint connecting lines are defined as the passenger crotch point. The position of the hip joint in the sitting position of the human body is as shown in Figure 3 , and the simplified human body model is as shown in Figure 4 .

[0041] The calculation process is as follows:

[0042] Passenger (H point) coordinate = (passenger left hip joint center 5 coordinate + passenger right hip joint center 6 coordinate) / 2;

[0043] Hand grip center point coordinate = (passenger left hand palm coordinate + passenger right hand palm coordinate) / 2;

[0044] The converted data is imported into the CAD software for display.

[0045] The above method is executed in a passenger H point and hand grip center point measuring device, which mainly consists of an adjustable steering wheel 1, a seat 2 and a pedal mechanism, and a motion capture system. The steering wheel can be adjusted and fixed according to the holding method of the experimental personnel, so that the grip position of the palm is different from the upper surface of the steering wheel arranged in the traditional way. According to the grip position of the palm, the vehicle is designed, so that the human engineering size is more in line with the user's experience. The position and stroke of the steering wheel and the seat 2 can be designed according to these data. This design method is more suitable for Chinese human body. According to these data, the development of Chinese three-dimensional H point device and the comfort design of the seat 2 can be carried out.

[0046] The motion capture system and the seat 2 are in the same coordinate system, the motion capture system transmits the collected signals to the processing device, the processing device performs the measurement method of the occupant H point and the hand grip center point, and through the above simple algorithm, the optimal position of the occupant H point and the hand grip center point can be efficiently and accurately obtained.

[0047] At present, there are few methods and devices for measuring the hip point of actual personnel in the industry. The paper "Research on Automobile Man-machine Space Layout Based on Chinese Human Driving Posture" of CARS proposes a method of obtaining the H point of the occupant by scanning the human body using a special scanner. This method has great limitations because the scanner needs to be scanned and special clothes need to be worn. The scanning time is long, and the hip point (H point) needs to be assisted by the human body toolkit in Ramsis. Therefore, a method for quickly and accurately measuring the H point is needed. The same applies to the measurement of the hand grip center point. The present application accurately measures the human body H point and the hand grip center point, and is suitable for the development and overall layout of the Chinese market. The motion capture system is combined with the vehicle to measure the H point and the hand grip center point. The experience personnel adjust the comfortable sitting posture according to the steering wheel, seat and three pedals, and obtain the occupant's bone and marker point information through the motion capture system, and convert it into the occupant's H point and hand grip center point. The measurement is fast, accurate and convenient.

[0048] The above is an exemplary description of the present application in combination with the drawings. Obviously, the specific implementation of the present application is not limited by the above method. Various non-essential improvements or direct application of the inventive concept and technical solution to other occasions without improvement are within the scope of protection of the present application.

Claims

1. A method for measuring the occupant H-point and the hand grip center point, characterized in that: the measuring device for the occupant H-point and the hand grip center point comprises an adjustable steering wheel, a seat and a pedal mechanism, and a motion capture device connected to and outputting collected signals to a processing device that executes the method for measuring the occupant H-point and the hand grip center point; the method for measuring the occupant H-point and the hand grip center point comprises the following steps: Step 1: obtaining experimental personnel marker point data and hip joint coordinate data through the motion capture device; Step 2: calculating the hip joint midpoint coordinates as the occupant H-point coordinates according to the hip joint coordinate data; Step 3: obtaining wrist point information of the left and right hands according to the motion capture device; Step 4: converting the palm size into left and right hand palm coordinates; Step 5: calculating the hand grip center coordinates according to the palm coordinates.

2. The method of claim 1, wherein: In Step 1, before capturing the coordinate data, the experimental personnel wear the motion capture device and adjust their positions, the motion capture device is provided with marker points at the centers of the left and right wrists and the left and right hip joints, and then the motion capture device transmits the collected marker point data to the motion capture software.

3. The method of claim 1, wherein: In Step 2, the real human body is abstracted as a human body skeleton model, which is then simplified as a model of important joint connections, and finally the left and right hip joint connecting lines are defined as the occupant hip points.

4. The method of measuring the occupant H-point and hand grip center point of claim 3, wherein: In Step 3, the palm is placed in the most comfortable position for holding the steering wheel, and the position of the steering wheel is adjusted according to the palm placement position.

5. The method of measuring the H-point and hand grip center point of an occupant of any of claims 1-4, wherein: The steps 1-5 are completed by a large number of personnel to perform the ride test, and the H-point coordinates and hand grip center coordinates data of each occupant in each ride test are obtained.

6. The method of measuring the occupant H-point and hand grip center point of claim 5, wherein: The coordinate system of the motion capture device used in each ride test is consistent with the whole vehicle coordinate system.

7. The method of measuring the occupant H-point and hand grip center point of claim 1 or 6, wherein: The calculation methods of the H-point coordinates and the hand grip center coordinates of each occupant are the same: the occupant H-point coordinates = (the left hip joint center coordinates of the occupant + the right hip joint center coordinates of the occupant) / 2; the hand grip center coordinate number = (the left hand palm coordinates of the occupant + the right hand palm coordinates of the occupant) / 2.

8. The method of measuring occupant H-point and hand grip center point of claim 1, wherein: The adjustable steering wheel position is adjusted to the fixed position according to the most comfortable orientation of the experimental personnel, and the motion capture device and the seat are in a unified coordinate system.

Images