[China Instrument Network Instrument R&D] The performance of parking brake (commonly referred to as handbrake) is an important guarantee for the safe driving of automobiles. Once the parking performance is not good, it is easy to slip on the ramp. According to industry insiders, the detection of the performance of parking brakes in cars is generally based on roller-reverse test-bed technology or road test. However, these two detection methods all have problems such as large occupied area and high cost. On October 18th, the reporter learned from relevant departments that a scientific research team in Yangzhou, Suzhou designed and manufactured the nation’s first portable electric parking performance tester. Through wireless network connection, test data can be directly uploaded to relevant databases or user mobile phone APPs. It is understood that this innovative detector will be expected to be the first to be used in Yangzhou inspection station and automobile 4S shop.
Detector computer design model Will be on hand brake or will slip the car brake failure is very dangerous October 13, Honda announced in the United States recalled 350,000 car Civic coupe and sedan. Honda stated that software that controls vehicle stability components may hinder the normal operation of the electronic parking system after the car's ignition switch is turned off. If the electronic parking system does not operate properly, the Civics in a suspended state may slip, causing unexpected injuries. At present, Honda has not received reports of accidents resulting from this failure.
So what exactly is a parking brake fault? Dai Xiaofeng, vice president of the School of Mechanical and Automotive Engineering at Yangzhou Institute of Industry and Technology explained that the parking brake is commonly referred to as handbrake. When the parking brake performance is not good, the driver will slip on the slope even if he pulls the hand brake. There have also been reports of car accidents caused by parking brake failures in various vehicles in China.
The parking performance test requirements for large-scale vehicles are also high. The cost has also been high Since 1995, Dai Xiaofeng has been engaged in research related to automobile testing. In the more than 20 years of research, the team he led has a number of patents in the field of vehicle testing equipment R&D. The research and development of automotive testing equipment has been applied in many areas of the country.
"The latest version of the "Safety Inspection Technologies and Methods for Motor Vehicles" simplifies the inspection procedures for small cars and mini-vehicles, but special vehicles, trailers, other types of passenger cars, vans, 7 seats and more than 7 vehicles, And passenger cars with a service life of more than 10 years still need to check the parking brake.†He said that some models of drum brake test benches can be tested, but for some vehicles and lines that are heavy, wide, etc., that cannot be brought online. Cars with questionable internal test results need to be tested using the road test ramp method.
With the rapid increase in the number of car ownership in China, the demand for vehicle testing is also growing. Dai Xiaofeng said that some vehicle inspection stations are not equipped with ramp detection sites. “In the course of communicating with some of the inspection stations in the past few years, we learned that the site requirements and costs required for the parking brake ramp detection are high.†He told reporters that due to the different types of vehicles detected, according to relevant regulations The inspection agency requires the establishment of two ramps to measure the parking performance of the vehicles. The required site area should be at least 400 square meters, and the cost should be about 100,000 yuan.
Because of this, many inspection agencies are unable to carry out this business. According to the "Supplementary Requirements for Assessment of Motor Vehicle Safety Technology Inspection Organizations Qualified by Inspection and Qualification Authority Qualifications" issued by the State in 2015, it is required that a test station should have a parking ramp to meet the inspection requirements of the vehicle models under inspection. In the absence of a test ramp, refer to the relevant standards and use a qualified instrument to test the parking brake performance.
Dai Xiaofeng said that the personnel at the inspection station also stated that they hope to have a better method and that they will have a cheaper instrument than the ramp test device.
The team spent nearly a thousand years trying to design a portable parking performance tester. From the first half of 2015, the 11-person team led by Dai Xiaofeng started the development of this parking performance tester.
“Three kinds of parking brake testers were designed. We have separately prepared samples for these three kinds of types. Previously, we have carried out the drawing design of the detector for each type of brake, and each category has at least rejected 50. A member of the team, Wu Huajie, told reporters that since the testing standards at home and abroad are not the same, there are no samples that can be learned from abroad. Therefore, the physical model, turbine design, and wire of the original drum reaction force brake station are completed. The size of the bar, each component needs careful scrutiny.
After a year of research and development, they finally designed an experimental sample of a portable performance tester. "The installed equipment is about 1.7 meters and weighs nearly 200 kilograms. We convert the grade into the international standard horizontal tension and set different pulling power for different models to judge whether the parking brake performance is qualified or not."
In addition to testing the parking brake performance, it is also possible to detect driving brakes, ie whether the brakes meet the standards. Wu Huajie explained that once there is a problem with the car's brakes, the driver can't stop in a short time and keep the driving direction stable, which will cause a great potential safety hazard. As for the service brake system, only the driver needs to step on the brake and connect the vehicle to the detection instrument, and the detection can be performed.
Dai Xiaofeng said that this device can be used not only in vehicle inspection stations, but also in 4S stores or car repair companies. “Now they do not have such detection capabilities. This portable device can provide owners with more security through inspection. The protection."
Yangzhou is expected to use equipment to know the data through wireless connection. It is understood that this portable detector is based on the original detection method and designed a portable vehicle brake performance tester with accurate measurement, easy to carry, simple structure, and low cost; The instruments connected to the network are more convenient for real-time understanding of parameters such as vehicles, brakes, tires, and roads. "Now that we have achieved a wireless connection, we can transfer data from the instrument to the relevant data terminal. We have also recently developed a series of programs. In the future, this device will also be interconnected with mobile phones, and the device can be remotely monitored via Bluetooth. ."
Dai Xiaofeng revealed that the error rate of this car parking brake detector is not more than 5%. It has applied for a national patent and has entered the production stage of small batches. “Many inspection stations in the province have already contacted us. Yangzhou is expected to be the first to use this equipment next year.†He told reporters that from the standpoint of parking brake detection cost, it can save more than 35%, if the savings are based on each test line With 50,000 calculations, it can save an annual testing cost of 500 million yuan.
(Original title: Yangzhou team developed portable parking performance tester is expected to be used first in the next year)
Detector computer design model
So what exactly is a parking brake fault? Dai Xiaofeng, vice president of the School of Mechanical and Automotive Engineering at Yangzhou Institute of Industry and Technology explained that the parking brake is commonly referred to as handbrake. When the parking brake performance is not good, the driver will slip on the slope even if he pulls the hand brake. There have also been reports of car accidents caused by parking brake failures in various vehicles in China.
The parking performance test requirements for large-scale vehicles are also high. The cost has also been high Since 1995, Dai Xiaofeng has been engaged in research related to automobile testing. In the more than 20 years of research, the team he led has a number of patents in the field of vehicle testing equipment R&D. The research and development of automotive testing equipment has been applied in many areas of the country.
"The latest version of the "Safety Inspection Technologies and Methods for Motor Vehicles" simplifies the inspection procedures for small cars and mini-vehicles, but special vehicles, trailers, other types of passenger cars, vans, 7 seats and more than 7 vehicles, And passenger cars with a service life of more than 10 years still need to check the parking brake.†He said that some models of drum brake test benches can be tested, but for some vehicles and lines that are heavy, wide, etc., that cannot be brought online. Cars with questionable internal test results need to be tested using the road test ramp method.
With the rapid increase in the number of car ownership in China, the demand for vehicle testing is also growing. Dai Xiaofeng said that some vehicle inspection stations are not equipped with ramp detection sites. “In the course of communicating with some of the inspection stations in the past few years, we learned that the site requirements and costs required for the parking brake ramp detection are high.†He told reporters that due to the different types of vehicles detected, according to relevant regulations The inspection agency requires the establishment of two ramps to measure the parking performance of the vehicles. The required site area should be at least 400 square meters, and the cost should be about 100,000 yuan.
Because of this, many inspection agencies are unable to carry out this business. According to the "Supplementary Requirements for Assessment of Motor Vehicle Safety Technology Inspection Organizations Qualified by Inspection and Qualification Authority Qualifications" issued by the State in 2015, it is required that a test station should have a parking ramp to meet the inspection requirements of the vehicle models under inspection. In the absence of a test ramp, refer to the relevant standards and use a qualified instrument to test the parking brake performance.
Dai Xiaofeng said that the personnel at the inspection station also stated that they hope to have a better method and that they will have a cheaper instrument than the ramp test device.
The team spent nearly a thousand years trying to design a portable parking performance tester. From the first half of 2015, the 11-person team led by Dai Xiaofeng started the development of this parking performance tester.
“Three kinds of parking brake testers were designed. We have separately prepared samples for these three kinds of types. Previously, we have carried out the drawing design of the detector for each type of brake, and each category has at least rejected 50. A member of the team, Wu Huajie, told reporters that since the testing standards at home and abroad are not the same, there are no samples that can be learned from abroad. Therefore, the physical model, turbine design, and wire of the original drum reaction force brake station are completed. The size of the bar, each component needs careful scrutiny.
After a year of research and development, they finally designed an experimental sample of a portable performance tester. "The installed equipment is about 1.7 meters and weighs nearly 200 kilograms. We convert the grade into the international standard horizontal tension and set different pulling power for different models to judge whether the parking brake performance is qualified or not."
In addition to testing the parking brake performance, it is also possible to detect driving brakes, ie whether the brakes meet the standards. Wu Huajie explained that once there is a problem with the car's brakes, the driver can't stop in a short time and keep the driving direction stable, which will cause a great potential safety hazard. As for the service brake system, only the driver needs to step on the brake and connect the vehicle to the detection instrument, and the detection can be performed.
Dai Xiaofeng said that this device can be used not only in vehicle inspection stations, but also in 4S stores or car repair companies. “Now they do not have such detection capabilities. This portable device can provide owners with more security through inspection. The protection."
Yangzhou is expected to use equipment to know the data through wireless connection. It is understood that this portable detector is based on the original detection method and designed a portable vehicle brake performance tester with accurate measurement, easy to carry, simple structure, and low cost; The instruments connected to the network are more convenient for real-time understanding of parameters such as vehicles, brakes, tires, and roads. "Now that we have achieved a wireless connection, we can transfer data from the instrument to the relevant data terminal. We have also recently developed a series of programs. In the future, this device will also be interconnected with mobile phones, and the device can be remotely monitored via Bluetooth. ."
Dai Xiaofeng revealed that the error rate of this car parking brake detector is not more than 5%. It has applied for a national patent and has entered the production stage of small batches. “Many inspection stations in the province have already contacted us. Yangzhou is expected to be the first to use this equipment next year.†He told reporters that from the standpoint of parking brake detection cost, it can save more than 35%, if the savings are based on each test line With 50,000 calculations, it can save an annual testing cost of 500 million yuan.
(Original title: Yangzhou team developed portable parking performance tester is expected to be used first in the next year)