Color Mark Sensors Terminology

B

Background Suppression:

Background suppression is a technique used in color mark sensors to eliminate interference from the background or surroundings of the sensing area. The sensor emits a beam of light that is directed toward the target object, and the reflected light is analyzed to determine the color of the object. However, if there are other objects or surfaces in the background that reflect the same wavelength of light, it can cause interference and affect the accuracy of the sensor’s measurements. Background suppression technology allows the sensor to filter out this interference and focus only on the color of the target object. This technique is particularly useful in applications where the target object is surrounded by other materials or in environments with changing lighting conditions.

C

Color Detection Threshold:

Color detection threshold refers to the minimum difference in color between two objects that a color mark sensor can detect. This value is typically expressed as a numerical value, with lower values indicating a higher sensitivity to color differences. The color detection threshold is an important specification for color mark sensors, as it determines the sensor’s ability to distinguish between similar colors and provide accurate readings. In applications where precise color recognition is critical, such as in color sorting or inspection systems, a low color detection threshold is essential to ensure accurate and reliable measurements. Color detection thresholds can be adjusted in some color mark sensors to accommodate for different lighting conditions or color variations in the target objects.

Color Difference Sensing:

Color difference sensing is a technique used in color mark sensors to detect differences in color between two objects. The sensor emits a beam of light toward the target object, and the reflected light is analyzed to determine the color of the object. Color difference sensing compares the color of the target object to a reference color, which is set by the user or the manufacturer. The difference between the two colors is then calculated and used to determine whether the target object meets the desired color specifications. This technique is particularly useful in applications where small color variations must be detected, such as in color sorting or inspection systems. Color difference sensing allows for highly accurate and reliable color recognition, even in environments with changing lighting conditions or variations in the target objects.

Color Mark Sensor:

A color mark sensor is an electronic device that is used to detect and recognize colors in objects. It is commonly used in automated manufacturing and assembly systems to sort or inspect objects based on their color. The sensor typically emits a beam of light toward the object and measures the reflected light to determine the object’s color. They can detect a wide range of colors and may also have features such as adjustable color detection thresholds and background suppression to enhance their accuracy and reliability. Color mark sensors are an important tool for quality control and inspection in many industries, including automotive, food and beverage, and electronics manufacturing.

Color Match Output:

Color match output is a feature of color mark sensors that provides a signal or indication when a target object matches a specified color. The sensor emits a beam of light toward the target object and measures the reflected light to determine the object’s color. When the object’s color matches the specified color, the sensor generates an output signal indicating that a match has been detected. This feature is commonly used in manufacturing and assembly systems to sort or inspect objects based on their color. It allows for high-speed and reliable color detection and can improve the efficiency and accuracy of the manufacturing process. Color match output may be adjustable to accommodate different lighting conditions or color variations in the target objects.

Color Mismatch Mode:

Color Mismatch mode is a feature of color mark sensors that detects when a target object does not match the specified color. The sensor emits a beam of light toward the target object and measures the reflected light to determine the object’s color. If the object’s color does not match the specified color, the sensor generates an output signal indicating that a mismatch has been detected. This feature is commonly used in manufacturing and assembly systems to reject objects that do not meet the required color specifications. Color Mismatch mode allows for high-speed and reliable color detection and can help to prevent errors and defects in the manufacturing process. It may be adjustable to accommodate different lighting conditions or color variations in the target objects.

Color Recognition:

Color recognition is the ability of an electronic device, such as a color mark sensor, to detect and distinguish between different colors in objects. The device emits a beam of light toward the object and measures the reflected light to determine the object’s color. Color recognition is important in many applications, including automated manufacturing and assembly systems, quality control, and object sorting. Color recognition sensors are available in different configurations, such as diffuse, retroreflective, and through-beam sensors, and may use different types of light sources such as LED or laser. They can detect a wide range of colors and may also have features such as adjustable color detection thresholds and background suppression to enhance their accuracy and reliability.

Color Tolerance Adjustment:

Color tolerance adjustment is a feature of color mark sensors that allows the user to adjust the range of acceptable color variations for a target object. The sensor emits a beam of light toward the object and measures the reflected light to determine the object’s color. The color tolerance adjustment feature allows the user to set a color threshold that determines the acceptable range of color variations that will still be detected as a match. This is important because objects may have slight color variations due to differences in lighting conditions or manufacturing variations. By adjusting the color tolerance, the sensor can ensure that objects are still detected as a match even if they have slight color variations. This feature can improve the accuracy and reliability of color detection in manufacturing and assembly systems.

Connection Method:

The connection method refers to the way a color mark sensor or other electronic device is connected to other equipment or systems. There are various connection methods available, depending on the type of device and the application requirements. For example, some color mark sensors may have a direct wiring connection, while others may use a connector plug. Connector plugs may come in different sizes and types, such as M8 or M12.

Contrast Sensing:

Contrast sensing is a technology used in sensors to detect the contrast between different colors or shades of an object. The sensor emits a beam of light towards the object and measures the amount of light reflected back. The contrast between the object and its background is then analyzed to determine the object’s position, size, or other characteristics. Contrast sensors are commonly used in industries such as packaging, printing, and automotive manufacturing, where it is necessary to accurately detect the position of objects with different colors or shades. The sensors can be used to detect dark-on-light or light-on-dark contrasts and can be adjusted to detect specific contrast levels or color variations. Contrast sensing can help improve the accuracy and speed of manufacturing and assembly processes, as well as reduce errors and waste.

Current Consumption:

Current consumption refers to the amount of electrical current a device or system uses during operation. It is measured in amperes or milliamperes and is an important factor to consider when designing or selecting electronic devices. High current consumption can reduce battery life and generate heat, while low current consumption can improve energy efficiency and extend battery life.

D

Degree of Protection:

Degree of protection, also known as Ingress Protection (IP) rating, refers to a standardized classification system used to measure the level of protection a device or enclosure provides against solid objects (like dust) and liquids. The IP rating consists of two digits, where the first digit indicates the degree of protection against solid objects and the second digit indicates the degree of protection against liquids. For example, a device with an IP68 rating provides the highest level of protection against both solid objects and liquids. The degree of protection is an important factor to consider when selecting devices for use in harsh environments or outdoor settings, as it can affect the device’s durability and performance.

Dielectric Strength:

Dielectric strength refers to the ability of an insulating material to withstand an electric field without breaking down or allowing electrical current to flow through it. It is typically measured in units of volts per unit of thickness (such as volts per mil or volts per micron). Dielectric strength is an important factor to consider when selecting materials for use in electrical insulation or high-voltage applications, as materials with low dielectric strength may break down and fail when exposed to high electric fields. The dielectric strength of a material may be affected by factors such as temperature, humidity, and the presence of contaminants.

Digital Output:

Digital output refers to a type of signal output used in electronic devices, where the output signal is in the form of discrete, binary values (either “0” or “1”). Digital output is commonly used to transmit data and control signals between devices and can be used in a wide range of applications. The advantages of digital output include high noise immunity, easy integration with digital processing systems, and improved accuracy and reliability compared to analog signals.

Display:

A color mark sensor display is a type of display used in color mark sensors. These sensors are used to detect and recognize specific colors or color patterns in a target material and can be used in a variety of applications, such as sorting packaging, and quality control. The color mark sensor display typically provides visual feedback to the user, indicating whether the sensor has successfully detected the desired color or color pattern. The display can also be used to adjust various sensor settings, such as sensitivity, threshold, and color tolerance. The quality of the color mark sensor display is an important factor in the user experience and is determined by factors such as resolution, color accuracy, contrast ratio, and viewing angle.

E

Edge Detection:

Edge detection is a feature in color mark sensors that allows them to detect the edge of a particular color mark. It is used to accurately detect the position of a product on a production line for sorting, counting, or other operations. The edge detection feature helps to minimize errors by ensuring that only the correct product is processed. The sensors use algorithms to identify the edges of the color marks and adjust the position of the product accordingly. This feature is particularly useful in applications where the color marks are not uniform in shape or size.

External Input:

An external input may refer to a trigger signal or other command received from another device or system to initiate the color detection process. This signal may be used to start or stop the sensor, adjust its settings, or perform other functions. An external input may be transmitted through a wired or wireless connection and can be programmed to trigger various actions based on the received signal.

F

Foreground Suppression:

Foreground suppression is a technique used by color mark sensors to ignore the foreground of the target and focus only on the color mark. This is achieved by comparing the color of the mark to the surrounding colors and filtering out the foreground colors. By suppressing the foreground, the sensor can accurately detect the mark’s location and provide a reliable output signal. This technique is particularly useful when the target has a complex background or multiple colors, as it allows for more precise sensing and reduces the likelihood of false detections.

H

Hysteresis:

Hysteresis in color mark sensors is a feature that allows the sensor to maintain a stable output signal even when the sensing target’s color or reflectivity changes slightly. It is the difference between the sensor’s activation and deactivation thresholds. Hysteresis ensures that the sensor output remains stable and reliable even in the presence of noise or other sources of signal interference. This feature is especially important in applications where the sensing target’s surface color or reflectivity can vary due to external factors like lighting or temperature changes. By using a color mark sensor with hysteresis, manufacturers can improve their production processes’ efficiency and reduce the number of errors or defects.

I

Indicator:

Display or light that provides information or feedback on the status or functioning of the color mark sensor.

Insulation Resistance:

Insulation resistance refers to the ability of the color mark sensor to withstand high voltage without any leakage or electrical failure. It is a measure of the sensor’s safety and reliability. A high insulation resistance ensures that the sensor is safe to use and can maintain its performance even in harsh environmental conditions. Insulation resistance is measured in ohms and is usually indicated in the sensor’s technical specifications. It is important to ensure that the insulation resistance of the color mark sensor meets the requirements of the application to avoid any potential hazards or malfunctions.

L

Light Intensity Adjustment:

Light intensity adjustment is a feature found in color mark sensors that allows the user to adjust the amount of light used to detect colors on a target object. This feature is used to enhance color detection accuracy and can be adjusted based on the specific color mark or target object being detected. The light intensity adjustment is typically done using a potentiometer or a button on the sensor. By adjusting the light intensity, the color mark sensor can more accurately detect colors on the target object, improving the overall performance and reliability of the sensor.

Light Source:

A light source in a color mark sensor is used to illuminate the sensing area to detect the presence or absence of color marks. The most common types of light sources in color mark sensors are LEDs and lasers. The choice of a light source depends on the application and the color of the mark to be detected. For example, red light sources are used to detect marks with red hues, while blue light sources are used for marks with blue hues. In addition to the color, the intensity of the light source can also be adjusted to optimize the sensing performance.

Lock Function:

A lock function is a feature in a color mark sensor that prevents accidental or unauthorized changes to the sensor’s settings. It can be activated by pressing and holding a specific button or a combination of buttons for a certain amount of time. Once activated, the lock function will prevent any changes to the sensor’s settings until it is unlocked by the user. This is particularly useful in industrial settings where multiple operators may use the same equipment or when the sensor is installed in an area where it may be accidentally bumped or moved.

M

Mounting Brackets:

Mounting Brackets are hardware components used to mount and install color mark sensors securely. They provide a stable and reliable foundation for the sensors to ensure accurate and consistent readings. The brackets come in various sizes and shapes to fit different types of sensors and installation requirements. Some brackets allow for adjustment and positioning of the sensor for optimal performance. Proper mounting brackets can ensure that the sensor is placed at the right angle and distance to detect the target accurately.

N

Noise Immunity:

Noise immunity refers to the ability of a color mark sensor to filter out unwanted signals or interference from the surrounding environment, such as electrical noise, vibration, or changes in ambient light conditions. High levels of noise can cause false detections or inaccurate readings, leading to production errors and inefficiencies. To ensure reliable performance in industrial settings, color mark sensors typically incorporate advanced noise reduction techniques, such as signal averaging, signal filtering, and digital signal processing. These techniques help to improve the sensor’s signal-to-noise ratio and minimize the effects of external interference on the sensing output. Noise immunity is an important factor to consider when selecting a color mark sensor for a specific application.

NPN Output:

NPN stands for “negative-positive-negative”, which refers to the way the output transistor is wired. In an NPN output, the load is connected to the positive supply voltage and the output transistor sinks current to the ground when activated.

Numerical Control:

Numerical control refers to the ability of a color mark sensor to provide precise and accurate output signals by adjusting its internal settings. This technology uses a set of predefined parameters to analyze the received color signals and calculate the exact position of the color mark. Numerical control allows for fine-tuning the sensor’s output, ensuring reliable detection of the target color mark even in challenging industrial environments. It is an essential feature for achieving high levels of precision and accuracy in automated systems, such as those used in packaging, printing, and manufacturing processes. The numerical control feature of a color mark sensor can be adjusted manually using dedicated buttons or automatically using a teach-in function.

P

PNP Output:

PNP output refers to the type of output signal that is provided by a sensor or a device, which is compatible with PNP (positive-negative-positive) input/output devices. In PNP output, the output transistor is connected to a positive voltage supply, and the output is switched to the negative side.

Polarizing Filters:

Polarizing filters are optical components that allow light waves oscillating in a specific direction to pass through while blocking light oscillating in other directions. They are commonly used in color mark sensors to reduce glare and improve contrast by selectively filtering out polarized light. By blocking unwanted light reflections and enhancing the desired signal, polarizing filters can help to improve the accuracy and reliability of color mark detection. The filters are typically made from a thin film of polarizing material, such as iodine, stretched over a substrate, and they can be oriented in different directions to adjust the angle of polarization. Polarizing filters can be used in combination with other optical components, such as lenses and prisms, to create more complex optical systems.

Protection Circuit:

A protection circuit is a feature that protects the sensor from damage due to electrical surges or short circuits in the wiring. It acts as a safety mechanism to prevent the sensor from being permanently damaged by these types of events.

The protection circuit typically works by limiting the amount of current that can flow through the sensor in the event of an electrical surge or short circuit. This helps to prevent damage to the sensor and other components in the system.

R

Response Time:

Response time refers to the time taken by a color mark sensor to detect and respond to a change in the sensed color. The response time of a color mark sensor can vary depending on factors such as the sensing technology, signal processing speed, and the type of output mode used. A faster response time is usually desirable for high-speed applications where fast and accurate detection is critical. The response time of a color mark sensor is typically measured in milliseconds (ms), and it can range from a few milliseconds to several tens of milliseconds depending on the specific sensor model and its specifications. A shorter response time can result in better accuracy and efficiency, making it an important consideration when selecting a color-mark sensor for a particular application.

RGB (Red, Green, Blue) Sensing:

RGB (Red, Green, Blue) sensing is a color detection method used in color mark sensors. It uses three separate color sensors that detect the levels of red, green, and blue light reflected from the target surface. The levels of these three colors are then combined to create a unique color signature, which can be compared to pre-programmed color codes to determine if the target matches the desired color. RGB sensing is widely used in color sorting applications, where it is important to accurately identify and separate objects based on their color. RGB sensors can also be used in color detection applications in manufacturing, packaging, and other industrial processes.

S

Sensing Distance:

Sensing distance refers to the maximum distance at which a sensor can detect a target. Sensing distance is an important parameter that determines the distance between the sensor and the color mark required for reliable detection. This parameter is affected by several factors, such as the size and contrast of the color mark, the angle of incidence, and the ambient lighting conditions. It is typically specified by the manufacturer and is an important consideration when selecting a sensor for a specific application. A longer sensing distance may be required for larger or more complex targets, while a shorter sensing distance may be sufficient for smaller or simpler targets.

Sensing Method:

The sensing method refers to the technique used by a sensor to detect a target or object. The sensor emits light, which is then reflected off the mark and received by the sensor. The sensor then analyzes the color of the mark and compares it to a pre-programmed color threshold to determine whether the mark is present or not.

Sensing Mode:

Sensing Mode refers to the way in which a sensor detects the presence or absence of an object or material. Different sensing modes are used depending on the application requirements and the physical properties of the target. Common sensing modes diffuse reflection. 

Sensing Target:

The sensing target refers to the object or material that the sensor is detecting for color markings. The sensor emits light onto the sensing target and then analyzes the reflected light to determine the presence, absence, or position of a color mark on the target. The sensing target can be a wide range of materials, such as paper, plastic, metal, or fabric. The color mark sensor must be adjusted to recognize the specific color of the marking on the sensing target to accurately detect its presence. Proper adjustment of the sensing target is essential for reliable and accurate detection of color marks.

Shock:

Shock refers to the ability of the sensor to withstand mechanical shock or vibration without affecting its accuracy or performance. Shock resistance is an important factor to consider in industrial applications where the sensor may be subject to harsh operating conditions or frequent movement. A color mark sensor with high shock resistance will have a sturdy construction and protective measures in place to prevent damage from shock or vibration.

Signal Stability Indicator:

A signal stability indicator is a feature found in some color mark sensors which helps to ensure the consistency of the sensor’s output signal over time. The stability of the output signal is affected by factors such as changes in ambient lighting, sensor position, or sensing target properties. The signal stability indicator continuously monitors the output signal and provides a visual indication when the signal has stabilized, indicating that the sensor is ready for operation. This feature can help to reduce setup time and ensure the reliable operation of the sensor in a variety of applications.

Spot Size:

Spot size refers to the diameter of the area of a sensing target that can be detected by a sensor. The spot size is the size of the area that the sensor’s light beam is focused on to detect the color mark. The spot size is an important parameter to consider when selecting a color mark sensor because it determines the size of the color mark that the sensor can reliably detect. A smaller spot size allows for more precise detection of smaller color marks, while a larger spot size is better suited for larger color marks or applications where the sensing target is not well-defined. The spot size can be adjusted by changing the distance between the sensor and the sensing target, or by using a lens or other optical components to modify the sensor’s optics.

T

Teach-in Function:

The teach-in function in a color mark sensor is a feature that allows the sensor to learn the characteristics of the target color. The sensor is trained to detect the desired color by using a sample of the color or the background against which the color will be detected. This feature helps to reduce the time and effort required to manually adjust the color settings on the sensor. Once the sensor has learned the color, it can quickly and accurately detect the color mark on the target material during production. The teach-in function is especially useful in applications where the color or the target material changes frequently.

Threshold Adjustment:

Threshold adjustment is a feature in sensors that allows the user to set a specific threshold level for detection. This threshold level determines the minimum amount of signal required to trigger an output signal from the sensor. By adjusting the threshold level, the sensitivity of the sensor can be fine-tuned to detect specific targets or conditions. The threshold adjustment can usually be done manually through a potentiometer or digitally through a programming interface. This feature is commonly found in proximity sensors, photoelectric sensors, and other types of sensors that require a precise detection range.

Trigger Input:

a trigger input is an input signal that is used to start the color detection process. When the trigger input receives a signal, the color mark sensor begins scanning the surface for the target color. Trigger inputs are useful in applications where the color detection process needs to be synchronized with other devices or events, such as conveyor belt movement or product positioning. By using a trigger input, the color mark sensor can precisely detect the target color at the appropriate moment.

V

Vibration:

Vibration refers to the oscillating movement of an object or surface. Vibration can have a negative impact on their accuracy and reliability. Therefore, vibration resistance is an important consideration when choosing a sensor for a specific application. The vibration resistance is typically measured in terms of the acceleration and frequency range that a sensor can withstand without affecting its performance. Some sensors are designed to have high vibration resistance, which makes them suitable for use in industrial and automotive environments where vibration is common. Vibration-resistant sensors may also feature additional mechanical components, such as shock absorbers or damping materials, to help minimize the effects of vibration.

Conclusion

In conclusion, color mark sensors are widely used in industrial automation for detecting the presence and position of colored marks or labels on a moving object. Understanding the terminology associated with color mark sensors is essential for selecting the right sensor for a particular application and for effectively communicating with suppliers and customers.

Important terms related to color mark sensors include the sensing mode, color sensing capability, color detection method, sensing distance, response time, and ambient light immunity. It is also important to consider factors such as the size and shape of the color mark, the speed and direction of the moving object, and the environmental conditions in which the sensor will be used.

By familiarizing yourself with the terminology associated with color mark sensors, you can make informed decisions when selecting and using these sensors in industrial automation applications.