WTK6900P Audio Chip for Floor Scrubbers: Precise, Maintenance-Free Anomaly Detection

Friends, today we have an especially interesting cross-industry story to share! In the world of smart cleaning, traditional floor scrubbers are like “people feeling an elephant blindfolded” — they can only rely on infrared, mechanical, or negative pressure sensors to detect foreign objects around them, yet they are always confused by various interference factors.

Imagine this scenario: Your floor scrubber is working hard when suddenly there’s a “click” — a coin gets caught in the roller brush. Traditional detection solutions may require complex photoelectric systems or expensive negative pressure channels. What’s worse, these outdated solutions are prone to being blinded by sewage and foam, like seeing the world through tinted glasses.

So, is there a smarter solution? Today, Shenzhen WayTronic brings us an eye-opening answer — giving floor scrubbers a pair of “sensitive ears”.

Cross-Industry Technology Transplantation: From “Music Rhythm” to “Smart Cleaning”

Cross-Domain Technology Transfer – From ‘Music Rhythm’ to ‘Smart Cleaning’

The protagonist is WTK6900P spectrum chip originally designed for “music rhythm LED strips”. Like a natural musician, it captures every frequency component in audio signals to synchronize LED dancing with music beats. However, engineers discovered its deeper potential – if it can “understand” music beats, why not let it “listen” to abnormal machine sounds? Thus began this cross-domain technology migration, transforming WTK6900P from an entertainment device “sound engineer” to a scrubber “audio expert”.

When the scrubber’s roller brush traps coins, toothpicks or stones, the motor emits characteristic abnormal sounds – like mechanical “groans” signaling distress. Through real-time FFT analysis, WTK6900P precisely identifies these acoustic signatures, granting scrubbers unprecedented “auditory intelligence”.

Technical Breakdown – Why WTK6900P?

Some may ask: With so many audio chips available, why choose WTK6900P?

• WTK6900P integrates a 12-bit ADC and 100MHz FFT hardware accelerator – like installing a high-precision “ear” and intelligent “brain”. Official tests show it delivers 8/16/32/64-point spectra within 8kHz bandwidth with <20ms latency – faster than human auditory response!
• Remarkably, WTK6900P operates as a standalone solution. Supporting 2.4V-5.0V power supply without external DSP, it reduces BOM costs by 30%. Like compressing an orchestra into a soloist, it maintains sound quality while simplifying system complexity.
• With 31-level gain control and AGC (Automatic Gain Control), the chip self-adapts to environments. Whether on glossy white tiles or sound-absorbing dark wood floors, WTK6900P automatically adjusts sensitivity to prevent false triggers.

Soil Detection – Just 3 Simple Serial Commands

Switching from “music rhythm” to “soil detection” requires only 3 serial commands via 7E-EF protocol:

• Command F2 disables WS2812 output, dedicating serial resources to main MCU for seamless functionality

• Command F1 locks FFT analysis on 1-2kHz motor anomaly band, like tuning a stethoscope to optimal frequency

• Command F5 activates AGC, resolving distance-related sound field differences

Differentiated Detection Algorithm – Teaching Machines to Identify Anomalies Through Listening

How does WTK6900P achieve precision detection? Through this sophisticated algorithm:

• Noise Baseline Learning: Like human ears adapting to ambient noise, WTK6900P records 32-point spectra of motor idling noise within the first second, establishing a “clean” spectral template as acoustic reference.

• Real-Time Comparison: When foreign objects enter, high-frequency (2-4kHz) sound energy surges >6dB. The chip immediately reports this anomaly to the main controller via UART – like a trained sentry alert to suspicious sounds.

False alarm suppression mechanisms include:

• Smoothing algorithm to filter water drop noise
• 31-level gain control to suppress background noise This multi-layer protection acts as an intelligent “noise filter”, ensuring only genuine anomalies trigger alerts.

One-Minute Prototype Validation – 30% BOM Cost Reduction

Traditional sensor schemes require complex mechanical structures and optical designs, while WTK6900P offers incredible simplicity:

• Main controller connects P26 (TX) and P06 (RX) to any 3.3V UART port

• Hardware: Direct MIC+ to P24 and MIC- to P25, no amplifiers needed

Software configuration is equally straightforward. After sending 3 commands, the main controller receives 16-byte spectral energy data per second, enabling “reverse” or “shutdown” actions through simple differential calculations. The entire verification process takes less than one minute, making product development exceptionally efficient.

WTK6900P’s application in floor scrubbers represents a value leap from “music rhythm” to “smart cleaning”. This isn’t merely technology transfer, but a paradigm shift.

Structural simplification is immediate – one chip plus a microphone replaces traditional optical or negative pressure channels, dramatically reducing mechanical complexity. More importantly, this maintenance-free solution features:

• No mechanical moving parts
• Immunity to sewage and foam corrosion
• Extended service life

From cost perspective, 30% BOM reduction creates strong market competitiveness. From user experience standpoint, enhanced detection accuracy and faster response times make scrubbers smarter and more reliable.

If you’re looking for a suitable voice chip for your company’s products, feel free to contact us anytime: send an email to [email protected], or click here to fill out a short form in just 30 seconds. Our team will get in touch with you as soon as possible to provide free samples and a detailed quote. We are WayTronic, founded in 1999, with over 25 years of experience specializing in custom voice chip solutions. Backed by a team of 100+ senior engineers, we can precisely meet the diverse needs of different products. We also offer one-on-one selection guidance and technical support to help you find a practical and cost-effective voice chip with minimal effort. We look forward to working with you for mutual success!