Description
DSTC190 Power Supply Module
DSTC190 Power Supply Module
Module Clips Drive controller servo moto
DSTC190 Power Supply ModuleSuitable for steel manufacturing, thermal power generation, hydroelectric power generation, nuclear power generation, wind power generation, gas supply, and other glass manufacturing, paper mills, mechanical manufacturing, electronic manufacturing, automotive manufacturing, aviation manufacturing, chemical manufacturing, coal mining and selection, oil and natural gas mining and selection, metal mining and selection, and non-metallic mining and selection
2.1 Capacitive technology touch screen
It works by using the human body”s current induction. The capacitive touch screen is a four-layer composite glass screen.
The inner surface and interlayer of the glass screen are each coated with a layer of ITO.
The outermost layer is a thin layer of silica glass protective layer. The interlayer ITO coating serves as the working surface.
Four electrodes are drawn out, and the inner ITO layer is a shielding layer to ensure a good working environment. When a finger
touches the metal layer, due to the electric field of the human body, a coupling capacitance is formed between the user and the touch screen surface. For high-frequency current, the capacitance is a direct conductor, so the finger draws a small current from the contact point. This current flows
out from the electrodes on the four corners of the touch screen, and the current flowing through these four electrodes is proportional to the
distance from the finger to the four corners. The controller obtains the position of the touch point by accurately calculating the ratio of these four currents. .
2.2 Defects of capacitive touch screens
The light transmittance and clarity of the capacitive touch screen are better than the four-wire resistive screen, but of course it cannot be
compared with the surface acoustic wave screen and the five-wire resistive screen. The capacitive screen is seriously reflective,
and the four-layer composite touch screen with capacitive technology has uneven transmittance of light of various wavelengths, causing colo
r distortion. Due to the reflection of light between the layers, the image characters are also blurred.
In principle, the capacitive screen uses the human body as an electrode of a capacitor element. When a conductor is close to the
interlayer ITO working surface and a sufficient capacitance is coupled, the current flowing away is enough to cause the capacitive
screen to malfunction. . We know that although the capacitance value is inversely proportional to the distance between the poles,
it is directly proportional to the relative area, and is also related to the insulation coefficient of the medium. Therefore, when a larger
area of the palm or a conductive object is held close to the capacitive screen instead of touching it, it can cause the capacitive screen to
malfunction. In humid weather, this situation is particularly serious. Putting your body within 15 cm of the monitor can cause the
The main disadvantage of the capacitive screen is drift: when the ambient temperature and humidity change, and the environmental
electric field changes, it will cause the capacitive screen to drift, causing inaccuracy. For example: the temperature rise of the monito
r after turning on the screen will cause drift: when the user touches the screen while the other hand or side of the body is close to the
monitor, it will drift; larger objects near the capacitive touch screen will drift after being moved, and if someone comes around to watch
when you touch the screen, it will drift. It will cause drift; the reason for the drift of the capacitive screen is an inherent technical shortcoming
. Although the environmental potential surface (including the user”s body) is far away from the capacitive touch screen, it is much larger than
the finger area. They directly affect the determination of the touch position. . In addition, many relationships that should be linear in theory are actually non-linear. For example, people with different weights or fingers with different degrees of wetness draw different total currents, and the changes
in the total current and the changes in the four partial currents It is a non-linear relationship. The four-corner custom polar coordinate system
used by the capacitive touch screen does not have an origin on the coordinates. The controller cannot
detect and recover after drifting. Moreover, after the four A/Ds are completed, the four points are The calculation process from the flow value to
the X and Y coordinate values of the touch point on the rectangular coordinate system is complicated. Since there is no origin, the drift of the capacitive screen is cumulative
and calibration is often required at the job site. The outermost silica protective glass of the capacitive touch screen is very scratch-resistant,
but it is afraid of being hit by nails or hard objects. Knocking out a small hole will damage the interlayer ITO, whether it is damage to
the interlayer ITO or damage during installation and transportation. With the ITO layer on the inner surface, the capacitive screen cannot work properly.
3. Infrared touch screen
The infrared touch screen uses a dense infrared matrix in the X and Y directions to detect and locate the user”s touch. The infrared touch screen
installs a circuit board frame in front of the display. The circuit board arranges infrared transmitting tubes and infrared receiving tubes on the fou
r sides of the screen, corresponding to each other to form a horizontal and vertical infrared matrix. When a user touches the screen, his or he
finger will block the horizontal and vertical infrared rays passing through that location, so the location of the touch point on the screen can be
determined. Any touching object can change the infrared rays on the contact points to achieve touch screen operation.
In early concepts, infrared touch screens had technical limitations such as low resolution, limited touch methods, and susceptibility to
environmental interference and malfunction, so they once faded out of the market. Since then, the second generation of infrared screens
has partially solved the problem of anti-light interference. The third and fourth generations have also made improvements in resolution
and stability, but neither has made a
qualitative leap in key indicators or comprehensive performance. However, anyone who knows touch screen technology knows that infrared
touch screens are not interfered by current, voltage and static electricity and are suitable for harsh environmental conditions. Infrared technology
is the ultimate development trend of touch screen products. Touch screens that use acoustics and other material science technologies have their
own insurmountable barriers, such as damage and aging of a single sensor, fear of contamination of the touch interface, destructive use,
complicated maintenance, and other issues. As long as the infrared touch screen truly achieves high stability and high resolution, it will
surely replace other technical products and become the mainstream of the touch screen market.
In the past, the resolution of infrared touch screens was determined by the number of infrared tubes in the frame, so the resolution was
low. The main domestic products on the market were 32×32 and 40×32. In addition, it is said that infrared screens are more sensitive to
lighting environmental factors. Sometimes it may be misjudged or even crashed. These are exactly the weaknesses of infrared screens
promoted by domestic agents of foreign non-infrared touch screens. The resolution of the latest technology, the fifth-generation infrared
screen, depends on the number of infrared tubes, scanning frequency and difference algorithm. The resolution has
reached 1000X720. As for the infrared screen being unstable under lighting conditions, the second-generation infrared touch screen has
From the beginning, the weakness of resistance to light interference has been well overcome. The fifth-generation infrared touch screen
is a new generation of intelligent technology products. It achieves 1000*720 high resolution, multi-level self-adjusting and self-restoring
hardware adaptability and highly intelligent identification, and can operate in various harsh environments for a long time. Any use
below. And extended functions can be customized for users, such as network control, sound sensing, human body proximity sensing, user
software encryption protection, infrared data transmission, etc. Another major shortcoming of the infrared touch screen originally promoted
by the media is its poor anti-riot performance. In fact, the infrared screen can use any anti-riot glass that the customer is satisfied with without
increasing the cost too much and affecting the performance. This is something that other touch screens cannot imitate.
4. Surface acoustic wave touch screen
Contact: Mr. Lai
Wechat:17750010683
Whats app：+86 17750010683
Skype：+86 17750010683
QQ: 3221366881
3221366881@qq.com
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1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
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YOKOGAWA – Servo module, control cabinet node unit
Main products:
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