| More and more professional drivers like taxi drivers are coming out as the development of automobile industries and economy establishment in our country. All of them are always driving over time. Many traffic accidents that make citizen and nation suffer from economic damage have happened much every year due to drivers'driving tiredly. Vibration has a very important impact on drivers'discomfort and fatigue. Provided that, to research the ride comfort for professional drivers is very important. For the study on ride comfort, the ride comfort for non-professional drivers is focused on normally. But the ride comfort for professional drivers that actually should be studied is ignored. They are our objects in this research now. Taxi driver are typical object and the mission is to build an evaluation system for the professional drivers in this research. Firstly, all of the ride comfort evaluation standards have been studied. Then a new ride comfort evaluation method for professional drivers is established combining with the character that the taxi running at actually mold is at different speeds and different roads.After that, an evaluation system is developed with LabVIEW. The system can read, show and analyze the signal in time-domain that achieved by the hardware. Above that, it can analyze the signal in time-domain cut in any forms.Then, some key data such as the working duration of drivers', the rates of each road run by taxi, and so on are acquired by the questionnaire for the taxi drivers. The result of ride comfort for the taxi drivers is achieved after processing the data that gets from taxi vibration acceleration monitoring.At last, the heart beating speed and blood pressure of taxi drivers and the response time are measured after the vibration duration is 0, 2, 4, 6, 8, 10 hours. The phenomena that response time is longer and longer, the rate of heart beating is faster and faster and blood pressure raises firstly and then decreases are founded. The drivers will suffer from fatigue in about 8 hours. This result just matches the result of the subjective feeling of drivers. After calculating, the vibration dose value is 11.12ms-1.75 when the drivers are suffering from fatigue. So we can use this result to make the working duration more reasonable by widening the research result to the judgment of fatigue for the other professional drivers. |
