Automatic Weighing Function of Self-Loading Concrete Mixer Truck

The automatic weighing function is one of the core technologies of self-loading concrete mixer trucks and a key feature that distinguishes them from traditional mixer trucks and loaders. This function allows a single machine to serve as a loader, batching station, and mixer simultaneously, greatly improving on-site construction efficiency and concrete quality.

Principle of Automatic Weighing

The automatic weighing function refers to the integration of electronic weighing sensors into the mixer truck's hopper, hydraulic system, or electronic scale system, which can monitor and display the weight of aggregates, cement, water, and other materials in real time during the loading process. The data is transmitted to the cabin display or intelligent control panel, allowing the operator to easily track and manage the mix ratios.

The automatic weighing system of a self-loading concrete mixer truck mainly relies on electronic weighing sensors + data acquisition system + control display system. The basic working principle is as follows:

1. Weight Sensing by the Sensor

Pressure or tension sensors (e.g., strain gauge sensors) are installed on the hopper, bucket, mixer support, or hydraulic system.
When sand, gravel, cement, or water enters the hopper, the weight generates corresponding pressure or deformation.
The sensor converts the mechanical stress into an electrical signal.

2. Signal Acquisition and Amplification

The electrical signal from the sensor is very weak and needs to be amplified by an amplifier.
The data acquisition module converts the analog signal into a digital signal and sends it to the control system.

3. Calculation and Calibration

The control system converts the electrical signal into weight values based on the sensor’s characteristic curve.
The system supports zero calibration and coefficient setting to ensure weighing accuracy.

4. Real-Time Display and Alerts

The weight data is displayed on the in-cabin electronic screen.
If the weight exceeds the preset limit, the system issues an alert to prevent overloading or incorrect mix ratios.

5. Data Storage and Management

Some models are equipped with intelligent management modules that can record each weighing operation.
Data can also be uploaded to the cloud via 4G or IoT networks for remote project management and monitoring.

Core Advantages of Automatic Weighing

• Ensures Concrete Quality: Accurate material proportioning guarantees that concrete strength, durability, and other properties meet design requirements.

• Improves Construction Efficiency: Automates batching, reduces manual operations and human errors, shortens batch cycles, and reduces dependency on operator experience.

• Optimizes Cost and Control: Minimizes material waste and prevents losses caused by improper mix ratios. Detailed production records allow for quality traceability and project management.

• Enhances Equipment Adaptability: Advanced algorithms ensure weighing accuracy under complex on-site conditions such as vibration, slope, or uneven terrain.

Application Areas

Self-loading mixer trucks are particularly suitable for remote areas, small construction sites, and rural projects, where equipment mobility and independence from fixed power sources are important.

HAOMEI Machinery specializes in producing concrete mixing equipment and offers self-loading concrete mixer trucks with capacities from 1.2 to 6.5 cubic meters. The products come in a full range of models and can be customized according to customer needs. They are exported to multiple countries and regions, earning high trust and preference from clients. Customers are welcome to visit our factory; direct factory sales ensure competitive prices.