Weigh-In-Motion WIM Strip Sensors

Weigh-In-Motion (WIM) Strip Sensors

Keyword: Weigh-In-Motion (WIM) Strip Sensors, Narrow strip weighing, strip high-speed pre inspection weighing system

Narrow strip weighing introduces the design concept of multi-point weighing to expand the speed adaptation range into dynamic weighing technology, and deeply explores the principles and characteristics of dynamic weighing. Based on Weigh-In-Motion (WIM) Strip Sensors, a vehicle dynamics model, wavelet analysis, curve fitting, and linear regression core algorithm have been developed, which have been successfully applied in various fields of dynamic weighing, providing timely and accurate detection data and decision-making basis for highway toll collection, protection of road bridges and culverts, and highway maintenance management.

The inherent advantages of Weigh-In-Motion (WIM) Strip Sensors, such as simple installation, maintenance free, and extremely long lifespan, make them very suitable for application in high-speed pre inspection systems.

The narrow strip high-speed pre inspection weighing system performs weight pre inspection on cargo vehicles traveling on the lane without human intervention and without obstructing traffic. If a vehicle exceeds the load limit set by the system, the detection data, vehicle image, and recognized license plate number of the vehicle will be transmitted to the law enforcement station in front of it. At the same time, a variable information board will be installed on the door frame in front of the vehicle to display the license plate number and warning information of the violating vehicle. With the help of traffic signs on the roadside, the violating vehicle will be guided into the law enforcement station in front, and will be accurately weighed by the low-speed dynamic weighing system as the basis for law enforcement; After being tested by the narrow strip high-speed pre inspection weighing system, vehicles that meet the regulations can travel normally without entering the law enforcement station.

Main functions and features:

1. Dynamic weighing has high credibility, and the system provides a scientific and reliable data evaluation system;

2. Long lifespan, relying on advanced working principles and design concepts, the sensor has low stress and deformation, greatly reducing the fatigue speed of the sensor's elastic body and extending the sensor's lifespan;

3. Integrated installation without foundation pit, no drainage required, maintenance free;

4. The integrated installation method of resin casting on the road surface eliminates dust pollution and does not require later cleaning;

5. Micro deformation sealing installation, preventing the infiltration of ice water, sand and dust, and not affected by freezing, frost and snow;

6. Small construction volume, sensor dimensions of 1800mm * 70mm * 66mm, integrated installation method, no need for drainage, small engineering quantity, minimal damage to road surface, and short construction period.

7. The Narrow strip weighing system organically combines high-speed weighing with low-speed weighing and image monitoring. Low speed weighing shares high-speed weighing detection data, and combined with vehicle capture and image monitoring in the low-speed weighing area, it can inspect vehicles that have exceeded the limit and have not been processed or vehicles that have run into cards and escaped;

8. The Narrow strip weighing system adopts independently developed pattern recognition technology, which can correctly handle complex driving states such as lane crossing, weighing and braking, S-shaping, reversing, following, etc. during the vehicle's movement. At the same time, it can also deal with malicious and illegal driving of the vehicle, improving the overall reliability of the narrow strip high-speed pre check weighing system.

Application of Narrow Strip Sensing Weighing System in Off site Overloading Enforcement：

Through continuous exploration, practice, and technological accumulation in the field of intelligent transportation, a non site overloading law enforcement system based on narrow strip sensing dynamic weighing system and video monitoring technology has been developed for the control of overloading on roads, bridges, and culverts. This system is the first to achieve non site enforcement of overloading and overloading of vehicles without any restrictions. Through the organic combination of dynamic weighing technology and video monitoring, it provides non site enforcement basis. The system can ensure a weighing accuracy of ± 5% within the range of 0-80km/h.

Main technical parameters:

◎ Meet national weighing standards and achieve a dynamic weighing accuracy of ± 5% within the range of 0-80km/h;

◎Realize dynamic and accurate weighing of moving vehicles without any restrictions;

◎For the first time, the combination of dynamic weighing technology and digital lead sealing technology provides sufficient legal basis for the enforcement of overloading and exceeding limits;

◎ Reproducibility of evidence, the saved law enforcement evidence includes weighing data, instrument parameters, and video information to ensure the reproducibility of weighing results;

◎Evidence has a three-level security level, and digital lead sealing technology ensures that different authorities can obtain evidence information of different levels, ensuring the reliability of evidence;

◎Dynamic weighing has high reliability, and the system provides a scientific and reliable data evaluation system;

The narrow strip high-speed pre inspection weighing system adopts independently developed pattern recognition technology, which can correctly handle complex driving states such as crossing lanes, weighing brakes, S-line, reversing, following, etc. during the vehicle's movement. At the same time, it can also deal with malicious and illegal driving of the vehicle, improving the overall reliability of the system.