In the era of smart home, floor sweeping robot as a kind of high-performance cleaning equipment, more and more favored by consumers. Modern sweeping robot is not only a simple cleaning tool, but also an intelligent device that integrates a variety of advanced technologies. In order to enhance its working efficiency and user experience, the design and application of technology become particularly important. The application of pressure sensors makes these devices smarter in terms of detection and feedback, thus optimizing the cleaning process.
This paper provides an in-depth look at the multiple applications of pressure sensors in floor sweeping robot solutions, with a focus on the implementation of key features such as dust box detection, airtightness detection and HEPA humidity detection. Through the use of pressure sensors and vacuum detection sensors in the sweeper robot, the equipment is able to accurately measure vertical height and obstruction levels, thus effectively improving cleaning efficiency.
Table of Contents
Dust Box Inspection
The dust box is an important part of the cleaning process of a floor sweeper and carries the dust and debris collected during the vacuuming process. By means of an air pressure sensor, the device is able to monitor the filling level of the dust box in real time. When the dust box reaches a certain capacity, the sensor sends out an alarm to remind the user to empty it. This feature not only improves cleaning efficiency, but also avoids secondary pollution caused by overfilled dust boxes.
1. Principle of operation
The air pressure sensor can measure the pressure change inside the dust box. When the dust box is empty, the internal pressure is low; with the accumulation of dust, the internal pressure gradually increases. By setting a reasonable pressure threshold (e.g. 100-150Pa), the sensor can accurately determine the fullness of the dust box.
2. Related Technology
The commonly used pressure sensors in the market are absolute pressure sensors (e.g. WF WF280A) and digital pressure sensors (e.g. WF 5803 series). Absolute pressure sensors determine the filling condition of the dust box by sensing the absolute pressure change, while digital pressure sensors digitize the measured data, making it easier to transmit and analyze the data.
3. Case Study
A well-known brand of sweeping robot uses the WF 280A sensor for dust box detection. User feedback showed that the accuracy of the sensor reduced dust box emptying alerts by 40%, increasing user satisfaction.
Air tightness test
The airtightness test is a key component to ensure the effective operation of the sweeper. By utilizing pressure sensors, the device can detect the airtightness of the casing to avoid the loss of vacuuming ability due to insufficient airtightness.
2.1 Importance of Airtightness
Inadequate airtightness can lead to air leakage, which in turn affects the effectiveness of the vacuum cleaner. By monitoring the negative pressure inside the casing through the pressure sensor (usually set at less than -30Pa), it can effectively determine whether the airtightness is up to standard or not.
2.2 Monitoring method
The equipment usually adopts the negative pressure detection method, using the pressure sensor to continuously monitor the internal pressure. If the pressure changes beyond the preset range, the system will automatically send out an alarm to prompt the user to check the sealing of the equipment.
2.3 Technical Reference
According to the book “Sensors and Sensor Technology”, airtightness testing not only relies on the accuracy of the pressure sensor, but also closely related to the design and materials of the equipment. Proper design can improve the airtightness, which in turn enhances the vacuuming ability.
2.4 Data analysis
In the actual test, the suction drop rate of the equipment with the airtightness testing technology was about 30% lower than that of the equipment without the technology. This shows that good airtightness can significantly improve the cleaning effect of the equipment.
HEPA Humidity Test
HEPA filters play an important role in purifying the air. Through the digital air pressure sensor, the device can monitor the humidity level of the HEPA filter to determine its efficiency.
3.1 Function of HEPA Filter
HEPA filter can capture small suspended particles and purify the air. As the time of use increases, the humidity of the filter will affect its filtration performance, so immediate monitoring of the humidity level (usually set between 30% and 60%) is essential to ensure air quality.
3.2 Humidity Detection Technology
Digital air pressure sensors (e.g. WF 5803F series) can quickly determine the condition of the filter by detecting changes in air pressure and humidity around the filter. Once the humidity is detected to be over the standard, the system will suggest the user to clean or replace the filter.
3.3 Practical Application Cases
A brand of mopping robot introduces a humidity detection function, and its digital air pressure sensor effectively monitors the humidity of the HEPA filter during use. When the humidity reaches 70%, the system will issue a warning to enhance the user experience.
Accurate Measurement of Vertical Height and Degree of Obstruction
Another important function of the pressure sensor is to measure vertical height and obstruction level. By monitoring changes in air pressure, the device can recognize the height of obstacles and automatically adjust the sweeping path.
4.1 Height Measurement
Sweeping robots often encounter various obstacles during the sweeping process. Using pressure sensors, the device can instantly measure the vertical height (the threshold is usually set at 10-20cm) to determine whether it is necessary to adjust the path to avoid collision or fall.
4.2 Blockage Detection
When the filter or pipe is blocked, the suction power of the device will be reduced. By monitoring the pressure difference (e.g., the set pressure difference threshold is 50Pa), the device can quickly recognize the blockage and prompt the user to carry out maintenance in a timely manner.
4.3 Case Study
A well-known brand of sweeping robot is equipped with advanced pressure sensors that can accurately determine the height of obstacles and avoid them effectively. User feedback shows that the device performs well in complex environments and can effectively avoid collisions.
Monitoring of negative vacuum and pressure difference
By utilizing the vacuum detection sensor, the equipment is able to monitor the change of internal negative pressure in real time to accurately assess the status of the filtration system.
5.1 Necessity of negative pressure monitoring
Negative pressure is a key indicator of the suction power of a sweeper. By monitoring the negative pressure in real time (usually set between -20 and -50 Pa), the device can effectively determine the working status of the filtering system.
5.2 Data Analysis and Feedback
The monitoring data can be communicated with the main control unit via I2C sensors, and real-time data can be fed back to the user. This kind of data management enables the equipment to adjust itself and optimize the cleaning strategy when working.
5.3 Technical Support
Literature has shown that negative pressure detection is useful for improving the cleaning efficiency and user experience of the equipment. In real-world tests, the cleaning capacity of equipment with negative pressure monitoring was about 25% higher than that of equipment without it.
Conclusion
The use of pressure sensors in sweeping robots not only improves cleaning results but also enhances the user experience. Through precise measurements and real-time monitoring, the equipment is able to efficiently manage dust boxes, filters and airtightness. The realization of these functions relies on advanced sensor technologies such as air pressure sensors for sweepers, absolute pressure sensors, digital air pressure sensors and I2C sensors.
With the continuous progress of technology, the future of the sweeper robot will be more intelligent, able to adapt to more complex environments, to provide users with more efficient cleaning solutions. Pressure sensors will undoubtedly be an important aid in enhancing the performance of the devices in this fast-growing field of smart home.
