During the operation of the steam turbine, the dynamic response capability of the speed sensor is directly related to the stability and safety of the equipment. As a high-precision measuring device, one of the core performance indicators of the active speed sensor CS-3M16-L60 is the dynamic tracking capability, that is, when the speed changes rapidly, the lag error between the sensor output signal and the actual speed must be controlled within 0.1%. This feature is crucial for real-time monitoring and fault warning of steam turbines. To verify the dynamic tracking capability of CS-3M16-L60, scientific testing methods and rigorous experimental design are required to ensure that it can still maintain high-precision response under complex working conditions.

1. Sensor design principle and dynamic response characteristics

The active speed sensor CS-3M16-L60 adopts the principle of magnetoelectric induction. It senses the changes in the magnetic field generated when the rotor rotates through the built-in magnetic sensitive element, and then generates an electrical signal proportional to the speed. Its active design gives the sensor stronger anti-interference ability and signal stability, especially in harsh environments such as high temperature and high vibration. The realization of dynamic tracking capability depends on the response speed and algorithm optimization capability of the internal signal processing circuit of the sensor. For example, the sensor can quickly capture the instantaneous characteristics of speed changes through high-frequency sampling and filtering technology, and eliminate the influence of noise through the digital signal processing module, thereby shortening the delay time of signal transmission.

The generation of dynamic hysteresis error is usually related to the mechanical inertia of the sensor, the response delay of the electronic components, and the efficiency of the signal processing algorithm. For the speed sensor CS-3M16-L60, its design goal is to control the hysteresis error within 0.1% by optimizing material selection, improving circuit layout, and improving algorithm accuracy. This indicator means that when the speed changes in a step-like manner, the maximum deviation of the sensor output signal shall not exceed 0.1% of the actual speed.

2. Experimental design to verify dynamic tracking capability

In order to verify the dynamic tracking capability of the rotational speed probe CS-3M16-L60, a test platform that can simulate the actual operating conditions of the steam turbine needs to be built. The experimental environment should be as close to the actual working conditions as possible, including factors such as the frequency range of speed changes, load fluctuations, temperature gradients, and electromagnetic interference. During the test, the speed sensor CS-3M16-L60 needs to be synchronized with the high-precision reference speed measurement device, and the hysteresis error of the sensor needs to be evaluated by comparing the output data of the two.

The experimental steps usually include the following links:

• Benchmark calibration: Under static conditions, the rotational speed sensor CS-3M16-L60 and the reference device are synchronized to measure the same speed value to ensure that the output of the two is consistent in steady state.

• Dynamic excitation: Through a controllable motor or flywheel system, speed step changes of different frequencies and amplitudes are applied to simulate turbine startup, acceleration, deceleration and load mutation scenarios.

• Signal acquisition and analysis: Record the time series data of the sensor output signal and the reference signal, and calculate the difference between the two in phase difference, amplitude deviation and response time.

• Error evaluation: Use mathematical models or statistical methods to quantify the distribution law of hysteresis error and verify whether it meets the technical requirement of 0.1%.

3. Key technologies and challenges

During the verification process, the following technical difficulties need to be focused on:

• Signal synchronization: The sampling time of the speed sensor and the reference device must be strictly synchronized, otherwise it will lead to misjudgment of the phase difference. Usually, a high-precision clock source or an external trigger signal is used to achieve synchronization.

• Noise suppression: In dynamic testing, mechanical vibration and electromagnetic interference may introduce additional noise, which needs to be eliminated through shielded cables, filter circuits and software algorithms.

• Nonlinear response correction: Certain speed change modes may cause nonlinear distortion in the sensor output, which needs to be corrected through calibration curves or compensation algorithms.

In addition, the experiment also needs to consider the impact of ambient temperature on sensor performance. The packaging material and internal circuit of the speed sensor CS-3M16-L60 need to have good thermal stability to ensure the consistency of dynamic response over a wide temperature range. For example, in a high temperature environment, the magnetic sensitive element of the sensor may change its sensitivity due to thermal expansion, and it needs to be adjusted in real time through the temperature compensation module.

Through the above experimental design, the hysteresis error distribution data of the speed sensor CS-3M16-L60 under dynamic conditions can be obtained. For example, in the test of speed step change, if the maximum deviation of the sensor output signal is 0.08% of the actual speed, it means that its hysteresis error has met the requirement of 0.1%. Further analysis shows that the error is mainly concentrated at the moment of speed change, and then quickly converges to a stable state. This phenomenon is closely related to the response speed of the internal signal processing algorithm of the sensor.

In complex working condition tests, such as simulating the acceleration stage during the start-up of a steam turbine, the speed sensor CS-3M16-L60 needs to complete dynamic tracking from low speed to high speed in a short time. Experimental data show that the hysteresis error can still be kept within 0.1% when the speed change rate is as high as 10,000 rpm/s, proving that it has excellent transient response capability. In addition, long-term operation tests show that the dynamic performance of the sensor has no obvious attenuation after hundreds of hours of continuous operation, reflecting its reliability and durability.

The verification of the dynamic tracking capability of the speed sensor CS-3M16-L60 is not only a test of technical indicators, but also a reflection of its practical application value in steam turbine control systems. During turbine operation, the real-time performance of the speed signal directly affects the response speed and stability of the speed control system. For example, when the grid frequency fluctuates or the load changes suddenly, the control system needs to rely on high-precision speed signals to quickly adjust the valve opening to maintain power generation efficiency and grid safety. The 0.1% hysteresis error threshold of the speed sensor CS-3M16-L60 can provide millisecond-level response guarantees for the control system, significantly reducing the risk of overspeed and equipment wear.

When looking for high-quality, reliable speed sensors, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

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