Extreme Sensitive Response Flexible thin film pressure sensor
piezoresistive electronic pen micro
Description
SI4-G flexible thin film pressure sensor is a new type of sensor with independent intellectual property
rights of flexible pressure sensor technology. It is printed on
flexible thin material with strong adhesion, bending resistance and
high sensitivity of flexible Nano functional materials, so as to
achieve high sensitivity of pressure detection.
The flexible film pressure sensor is a resistive sensor. The output
resistance decreases as the pressure applied to the surface of the
sensor increases. The pressure can be measured through a specific
pressure-resistance relationship.
SI4-G flexible film pressure sensor is mainly used in the pressure
triggering and detection of electronic pens. It is installed at the
back of the pen core. When the user writes with the electronic pen,
it can detect the change of writing pressure. After algorithm
processing, handwriting recognition can be realized. , Posture
correction and other functions, the signal can be collected through
a simple circuit.
Features
Ø Ultra-thin,thickness less than 0.25mm
Ø bending resistance
Ø Quick response
Ø Long life,passed the pressing test of more than 1 million times
Ø The output signal is easy to detect
Ø Customizable product length, size, pin package, etc.
Ø Customizable sensor range parameters
Performance Index
| Model | SI4-G |
| Range | 0~500g |
| Thickness | ≤0.25mm |
| Dimension | See specification and size description |
| Response point | ≤30g |
| Repeatability | ±10%(50%loaded) |
| Consistency | ±20%(Batch of the same model) |
| Hysteresis | +10% (RF+ - RF-)/RF+ |
| Durability | ＞One million times |
| Initial Resistance | ＞10MΩ(Non-Loaded) |
| Response Time | ＜1ms |
| Resume Time | ＜15ms |
| Test Voltage | Typical Value DC 3.3V |
| Operating Temperature | -20℃ ～ 60℃ |
| EMI | No produce |
| ESD | Insensitivity |
| Model | pressure/g | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 |
| SIG-4 | resistance/KΩ | 5.26 | 3.24 | 2.47 | 2.10 | 1.85 | 1.66 | 1.55 | 1.45 | 1.38 | 1.33 |
Reference Circuit
Instructions
- SI4-Glexible thin film pressure sensor is a non-polar component,
there is no directionality in the circuit;
- When using, please place the pressure sensitive zone of the sensor
on a firm, flat surface. Using the sensor on a curved or irregular
surface will make the sensor initially conductive, that is, in a
"response" state when there is no pressure; in this state, the
sensor output resistance can still respond to pressure changes, and
the corresponding relationship is no longer applicable to the
reference data sheet;
- If the supporting surface and the force applying surface are both
rigid and hard surfaces, and the contact surface is larger than the
sensitive area of the sensor, due to the sensor's own structure,
the pressure response may be small and unstable. A round soft
rubber pad needs to be affixed to the center of the sensitive area,
the diameter is slightly smaller than the sensitive area, and the
area should be greater than 60% of the area of the sensitive area;
- You can use double-sided tape to fix the sensor on the supporting
surface. Pay attention that the supporting surface is tidy and
clean before pasting. It is recommended to use 3M brand
double-sided tape; provide customized services;
After the sensor is stressed and maintains the pressure, the output
resistance value will drift slightly over time, usually within 5%.
This error can be reduced by the method of timing calibration. In
the calibration operation, the waiting time after applying pressure
is consistent with the waiting time in actual applications. Since
the force state of the sensor is different in different application
scenarios, it is recommended that the user arrange the sensor
according to the actual application scenario and test the drift
parameters by themselves.
Announcements
- When using the sensor, try to make the load received evenly and
avoid direct contact with the sensor by sharp objects;
- Over-range use will reduce the performance of the sensor or even
destroy the sensor;
- The sensor terminal is made of copper and tin-plated material, and
the lead can be welded according to the needs. It should be noted
that the soldering temperature should not be too high, it is
recommended that it should not exceed 300°C, and the contact time
should not exceed 1 second, so as to prevent the high temperature
from melting and deforming the film substrate.
Details
About us
Henan Weiguo Intelligent Technology Co., LTD., founded in 2015, is
an important subsidiary of Hanwei Electronics Group Corporation
(Stock no.:300007) in the field of intelligent healthy, safe home
and IoT business. Henan Weiguo Intelligent Technology Co., LTD.,
relying on the core sensor technology, focuses on gas and smoke
alarm, air quality monitor, alcohol tester and firefighting
products. Based on introduction of featured technology from both
Hanwei Electronics Group Corporation and abroad, Henan Weiguo
intelligent Technology Co., LTD., has developed into an innovative
company with the collection of design, R&D development,
production, sales and service. We will always be committed to
becoming the leader in intelligent hardware, providing safe,
healthy, environmentally friendly and intelligent working and
living environment for families and users all over the world.
