I. Introduction

The measurement and control system utilizes a high-precision digital servo valve with force closed-loop control, capable of achieving constant load rate or constant stress rate loading. It provides high control accuracy and reliability. The system incorporates a microcomputer for electronic measurement, automatically conducting compressive strength tests, and generating, calculating, and printing reports. This machine is widely applied in the construction industry and testing agencies.

II.  Hydraulic Syst][

The hydraulic oil in the oil tank is driven by the motor and high-pressure pump into the oil circuit, flowing through the check valve, high-pressure oil filter, pressure differential valve group, and servo valve, and then enters the cylinder. The computer sends control signals to the servo valve, controlling the opening and direction of the valve, thereby controlling the flow into the cylinder to achieve constant speed control of the test force.

Ⅲ、 Force Measurement System

• Uses high-precision amplifiers and A/D converters with no range switching throughout, providing real-time display of load, peak value, loading speed, and strength.

• Implements a PID closed-loop control strategy for constant speed loading, displaying the loading curve in real-time.

• Automatic interval timing and continuous testing.

• Flexible and convenient querying and printing of test results.

IV. Software Description

（1）Main Interface

（2）Result Query

（3）Report Template

V. Safety Protection Devices

When the test force exceeds 3% of the maximum test force, overload protection is triggered, and the oil pump motor stops.

VI.  Main Performance and Technical Specifications

VII. Standard Factory Configuration List

VIII. Confidentiality of Technical Information and Documents

1. This technical proposal is part of our company’s technical documentation. The user is obligated to maintain the confidentiality of the technical information and documents provided by us, whether this proposal is adopted or not. This clause remains effective indefinitely.

2. We are also obligated to maintain the confidentiality of the technical information and documents provided by the user.