Eddy current speed sensor LDZS61

Model:LDZS61

1、 Overview

LDZS61The series eddy current speed sensor is a new type of speed sensor made based on the principle of eddy current effect. Due to the wide dynamic response range and strong measurement signal of eddy current measurement method, eddy current speed sensors are superior to magneto electric sensors

The speed sensor has the following excellent characteristics:

1. Can measure0～600,000RPMSpeed range; However, the magnetic electric speed sensor has weak signals at low speeds and cannot measure them. Usually, the magnetic electric speed sensor cannot measure the machine speed when turning the machine.

2. There are no magnetic components inside the eddy current speed sensor, so it is not easily affected by external electromagnetic field interference; The magnetic components inside the magneto electric speed sensor are susceptible to external electromagnetic interference, and usually the magneto electric speed sensor still has magnetic components when the machine is stopped50HzPower frequency pulse.

3. The eddy current speed sensor has a wide installation gap range and is easy to install and adjust; However, the installation gap range of magneto electric speed sensors is small, making installation and adjustment difficult, and due to the small installation distance, they are prone to wear on the measured surface.

4. A reliable pulse conversion circuit has been designed inside the eddy current speed sensor. The pulse shape is standardized, the amplitude is large and constant, and it can be directly connected to a universal frequency meter or speed measuring instrument; The output pulse of the magneto electric speed sensor needs to be amplified and shaped before it can be measured.

5. The sensor is designed with wiring errors and short-circuit protection circuits inside, and any wiring error will not damage the sensor.

6. The probe is enclosed in a stainless steel threaded circular tube, and the signal cable is protected by a stainless steel hose. The structure is sturdy, moisture-proof, dust-proof, and corrosion-resistant, and can work continuously for a long time in harsh environments.

Based on the above excellent characteristics, eddy current speed sensors have been widely used in the power, chemical, metallurgical, mechanical, and textile industries, replacing magneto electric speed sensors to achieve speed measurement, control, and protection of machines. When the tested surface is a single phase detection groove or convex platform, it can provide phase detection pulses for mechanical vibration analysis. In addition, the sensor can be used to issue alarms and switch signals to metal parts passing through or approaching it, or to count them.

2、 Working principle

It consists of a high-frequency oscillator, a detection amplifier, a pulse conversion circuit, and a fault-tolerant protection circuit. The oscillator adopts a dedicated precision amplitude stabilization integrated circuit, and the alternating magnetic field generated by it forms eddy currents near the surface of the metal object. The eddy current field in turn affects the amplitude of the oscillator, causing the amplitude of the oscillator to decrease as the measured metal object approaches. After detection and amplification, the pulse conversion circuit generates a standardized pulse signal.

3、 Main technical indicators

1. Working power supply:+12～+30VdcMaximum operating current15mA；

2. Installation gap:2 ～4 mm；

3. Speed range:0 ～600,000 RPM；

4. Pulse output:TTLPulse, high level is5～5.2VThe low level is0～0.5V；

5. Displacement output:1 ～5V；

6. Probe thread:M16×1；

7. probe length80 mm(Can be in80～200mmSelect within the scope);

8. cable length5 m(Can be in1～300mWithin the range of selection, cables can be protected with stainless steel hoses;

9. Usage environment:-25～+85℃, can work immersed in oil and water.