In the process of intelligent transformation in the coal industry, radar level sensors have become the core monitoring equipment for scenarios such as raw coal bunkers, clean coal bunkers, and coal washing pools due to their non-contact measurement and strong anti-interference capabilities. Optical ScienceGKYWG-50Taking the radar level gauge as an example, this device uses26GHzHigh frequency pulse radar technology has achieved high-precision continuous monitoring of solid materials such as coal powder and gangue, with a range coverage0-120Mi, blind spot only8Centimeters, measurement error controlled within±2mmWithin.

1、 Technical features to solve industry pain points

There are three major technological challenges in the coal storage environment: high dust concentration (up to)500g/m³）Low dielectric constant of the material（εr=1.8-3.5）The range span is large (from several meters to hundreds of meters for silos). Traditional ultrasonic level gauges experience signal attenuation exceeding in dusty environments60%ButGKYWG-50The frequency modulated continuous wave used（FMCW）Technology calculates the material level by the frequency difference between the transmitted and received signals, and its electromagnetic wave penetration is strong, especially in coal dust concentration2000g/m³Stable measurement can still be maintained in the environment. Equipment equipped with80GHzMillimeter wave radar, beam angle only3°It can effectively avoid false echoes caused by wall mounted materials in the warehouse.

2、 Typical application scenario practice

Dynamic monitoring of raw coal silo
Annual processing capability500A 10000 ton coal preparation plant,GKYWG-50By installing the waveguide, the problem has been solved30Measurement fluctuation caused by coal flow impact in a high height silo. The built-in intelligent echo processing algorithm of the device can automatically identify the resting angle of the coal pile surface (usually35°-45°）The distortion of the reflected signal caused ensures the rate of change in coal level2m/minThe frequency of data updates is up to0.5Hz.

Coal washing pool liquid level control
Regarding the coal containing wastewater generated during the coal washing process (dielectric constant)εr=25-40）The equipment is made of polytetrafluoroethylene（PTFE）Encapsulated antenna, with a corrosion resistance level of up toIP68. ThroughHARTAgreement andDCSSystem communication to achieve closed-loop control of suspension liquid level in heavy medium washing process, reducing the fluctuation range of sorting density to±0.01g/cm³.

Underground coal bunker safety monitoring
Mining intrinsic safety radar level gauge for methane-In an air mixed gas environment, through intrinsic safety circuit design (operating voltage)12VDC, current<100mA）Combined with a magnetic driven jet dust removal system, each24Automatically clear antenna dust accumulation within hours. In a certain coal mine-600mSuccessful warning in the application of horizontal coal bunker3Secondary coal level exceedance event to avoid warehouse accidents.

3、 Technical upgrade direction

The current industry is making breakthroughs in three aspects:

Multi band fusion technology: combiningKBand（24GHz）WithWBand（77GHz）Advantages, improving low dielectric constant materials (such as lignite)εr=1.5）Measurement accuracy

AIEcho recognition: Establishing a coal pile morphology database through deep learning algorithms to improve measurement accuracy under complex working conditions99.7%

Wireless networking capability: SupportsLoRaWireless transmission, single base station coverage2kmRadial area reduces the cost of underground wiring in mines40%above

With the coal industry'Mechanized personnel replacement, automated personnel reduction'With the advancement of policies, radar level sensors have evolved from a single measuring device to the core sensors of intelligent warehousing systems. The intrinsically safe mining products developed by companies such as Guangke have passedMACertification and Explosion proof Certificate（Ex dI Mb）We are pushing coal level monitoring into a new stage of millimeter level accuracy and millisecond level response. According to statistics, the application of this technology has improved the efficiency of inventory management in coal preparation plants35%Annual production cost savings exceed200Ten thousand yuan.