Image Measuring Instrument and Image Alignment Projector (True vs. False Image Measuring Instruments)
[Image measurement] is a rapidly evolving concept in the field of industrial inspection and metrology today. It represents advanced measurement technologies that integrate digital technology into industrial inspection, enabling precise spatial geometry calculations. Due to its high level of sophistication, it remains largely unknown to the general public. As a result, many [image alignment measuring projectors] have become popular, often mislabeled as "image measuring instruments" in the market.
The true [image measuring instrument], also known as an image mapper, is based on CCD digital imaging and relies heavily on powerful computer software for screen-based measurement and spatial geometry calculations. Once equipped with dedicated control and measurement software, the computer becomes the core of the device, acting as the "brain" of the system. It can quickly read the displacement values from an optical scale and instantly calculate the desired results using software modules based on spatial geometry. The system also generates visual graphics on the screen for the operator to compare and verify, making it easier to detect any potential deviations in measurements. All these operations are performed in real-time, leveraging the immense computing power of modern computers—something the operator may not even notice.
This kind of precision instrument, which uses CCD digital imaging and computer software to handle complex measurements, truly embodies the essence of an image measuring instrument. It combines advanced digital technology with intelligent processing, offering accuracy, speed, and ease of use.
In contrast, [image alignment measuring projectors] often feature a digital display screen and a computer. However, this combination is somewhat redundant since the computer's display capabilities far exceed those of a simple digital screen. In many cases, the computer used in such devices is limited, functioning more like a basic monitor or television with minimal functionality. It serves only as a visual aid for alignment, lacking any real "intelligence" in terms of electronics or mechanics. Therefore, distinguishing between real and fake image measuring instruments is relatively straightforward: check if it has a digital display and whether it possesses spatial geometry calculation capabilities.
VM Series Automatic Image Measuring Instrument
The Development of Image Measuring Instruments
In the past, the high-tech barriers of optics, mechanics, electricity, and software made it difficult for many companies to enter the field. The complexity of measurement software seemed like an insurmountable challenge. However, times have changed. Today, software is no longer seen as something intimidating. Companies that once struggled with these challenges are now competing in a new round of R&D. This has led to the birth of a new generation of image measuring instruments—also known as CNC imagers—which have brought this technology and the market competition to a new peak.
It’s safe to say that we’ve moved beyond the era of manual cranking. The current image measuring instruments represent a new age of digitalization, intelligence, and automation. With features like ±2μm measurement accuracy and a speed of 750mm/min, these devices offer improved efficiency, convenience, and performance. Functions such as automatic positioning, free part placement, and synchronized mapping make them far superior to traditional measurement projectors and microscopes.
These instruments are priced competitively to match the Chinese market, allowing them to gain a strong foothold among mainstream products. This healthy competition benefits both businesses and consumers, helping to bridge the gap between China’s industrial testing equipment and international standards.
The Difference Between Digital Image Measuring Instruments (CNC Version) and Handheld Ones
An image measuring instrument, also known as an image-type precision plotter, marks a qualitative leap from traditional measuring projectors. It upgrades industrial metrology methods by transitioning from optical projection alignment to computer-generated screen-based measurement.
It's worth noting that there are transitional products on the market that include both a digital display and a computer. However, strictly speaking, devices that only use the computer as a sighting tool are not true image measuring instruments. They should be classified as "image measuring projectors" or "image alignment projectors."
In short, a true image measuring instrument relies on computer screen measurement technology and powerful spatial geometry calculation software. These instruments come in two main types: digital image measuring instruments (also known as CNC image instruments) and handheld versions. The key differences lie in several areas:
First, digitized CNC technology enables precise and efficient operation. For example, when measuring the distance between two points A and B using a handheld instrument, the user must manually adjust the X and Y handles to align with each point, then click the mouse to record the position. Each click reads the optical scale displacement value into the computer, and after all points are recorded, the computer calculates the final result.
In contrast, a digital CNC image measuring instrument integrates various functions into one system. It uses micron-level precise hardware and intuitive software to perform tasks like variable speed movement, soft motion, electronic locking, and synchronized reading. Once the mouse locates points A and B, the computer automatically calculates and displays the result, making the process quick and easy for even beginners.
Second, digital technology allows for random workpiece placement. With a handheld instrument, users must manually adjust the platform and identify reference points for benchmark measurements. In contrast, a digital instrument uses software to handle complex coordinate transformations, allowing parts to be placed freely. Users can set the origin and reference direction at will, and the system displays markers on the screen, making reference measurements simple and intuitive.
Third, digital technology enables rapid CNC measurement. When measuring multiple identical workpieces, a handheld instrument requires manual, repetitive movements, which can be time-consuming and inefficient. A digital image measuring instrument, however, can create CNC coordinate data through sample measurements, drawing calculations, or data imports. It then automatically moves to target points and performs measurements, significantly improving efficiency and reducing labor costs. Operators can complete tasks that would take hours with a handheld instrument in just minutes.
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