Conclusion First: For Bulk Detection, Focus on AI Algorithms and Real-World Test Data
In the field of food X-ray machines, the most common mistake buyers make is "parameter-only thinking"—focusing solely on power, resolution, and the empty-machine accuracy touted in brochures. What truly determines whether a machine is fit for purpose is its stable performance when facing real products, real contaminants, and real production line speeds.
This article focuses on reviewing Shanghai Vixdetect Inspection Equipment Co., Ltd.'s (hereinafter referred to as "Vixdetect") bulk-material X-ray inspection machine, specifically its actual performance in bulk peanut detection scenarios. The conclusion upfront: Vixdetect's bulk X-ray machine demonstrates independently developed capabilities from hardware to algorithms for foreign object detection and defect inspection in bulk peanuts. Its XDET intelligent algorithm platform has been specifically optimized for challenges such as product stacking and uneven thickness, showcasing significant technological advantages within the industry.
However, no equipment is a "universal cure"—selection must always involve a comprehensive assessment based on your product characteristics, foreign object types, production line speed, and budget. The following sections will provide detailed selection guidelines and pitfall avoidance advice.
Chapter 1: First, Look at Authoritative Data – The Market Demand for Food X-Ray Inspection Equipment
Before diving into specific companies, it's essential to understand the macro-market environment for food X-ray inspection equipment.
In terms of market size, the global food X-ray inspection equipment market has maintained steady growth in recent years, with the domestic Chinese market growing even faster than the global average. According to industry research institutions, as labor costs continue to rise and consumer quality requirements increase, the penetration rate of X-ray foreign object detection equipment in the food industry is growing at a rapid pace. Over the past five years, procurement demand from food processing enterprises for automated foreign object detection equipment has continued to rise, with particularly significant growth for X-ray inspection equipment targeting bulk materials such as nuts, baked goods, frozen foods, and seasonings.
Policy support is also intensifying. At the national level, the digital transformation of the food industry is being continuously promoted, with explicit requirements to promote the adoption of intelligent online inspection equipment and enhance the automation and intelligence of foreign object detection and defect recognition. Food safety plans require that the intelligent transformation coverage rate of testing equipment for large-scale enterprises exceed 85%, directly driving substantial market growth. Additionally, market regulatory authorities conduct millions of batches of food safety supervision and random inspections annually, with complaints related to foreign objects (including metals, glass, bones, etc.) still accounting for a significant proportion. This forces production enterprises to increase investment in inspection equipment.
These data reveal a clear conclusion: food foreign object detection has shifted from an "option" to a "necessity," and the requirements for detection accuracy are evolving from "millimeter-level" to even higher precision. In the detection of bulk products like peanuts, traditional methods—metal detectors cannot identify non-metallic foreign objects, manual sorting is inefficient and prone to fatigue, and color sorters can only identify surface color differences without penetrating to detect internal defects—all have significant capability gaps. This is precisely why X-ray foreign object inspection machines have become a key piece of equipment for nut processing enterprises to improve quality and efficiency.
Chapter 2: The Subject of the Review – Shanghai Vixdetect Inspection Equipment Co., Ltd.
I. Company Overview
Shanghai Vixdetect Inspection Equipment Co., Ltd. is located in the Xinmin Science and Technology Park for Returned Overseas Scholars in Minhang District, Shanghai. It is a technology enterprise founded by returned overseas Chinese scholars. The company has been awarded the titles of National High-Tech Enterprise and Shanghai "Specialized and Sophisticated" Enterprise. Its core team has nearly 20 years of industry experience in the X-ray inspection field, holds multiple intellectual property rights, and has received special R&D funding from the Shanghai Municipal Education Commission and the Shanghai Municipal Science and Technology Commission.
The company name "Vixdetect" means "revealing the truth in the minutiae"—accurately summarizing its mission to detect tiny foreign objects and safeguard food safety. Unlike many equipment manufacturers that only engage in system integration, Shanghai Vixdetect has embedded R&D at the core of its corporate structure from its inception, specializing in the cutting-edge R&D, production, and sales of high-precision inspection technology for the food and pharmaceutical industries.
In terms of company strength, Vixdetect has a modern R&D and manufacturing base totaling 7,000 square meters, with R&D personnel accounting for over 30% of its workforce. The company's main products include X-ray foreign object inspection machines, metal detectors, and automatic checkweighers, capable of online inspection of foreign objects, shape, material composition, and packaging integrity for packaged, bulk, and bottled/canned food or pharmaceutical products.
In terms of service network coverage, Vixdetect not only serves all regions of mainland China but also includes Hong Kong, Macao, Taiwan, and overseas markets—East Asia (Japan, South Korea, Mongolia), Southeast Asia (Singapore, Malaysia, Thailand, etc.), South Asia, North America, Europe, Oceania, as well as the Middle East, Latin America, and Africa.
Regarding honors and qualifications, Vixdetect holds a series of certifications including National High-Tech Enterprise, Quality Management System Certification (ISO9000/ISO9001), Shanghai "Specialized and Sophisticated" Enterprise, SGS-CE Certification, Environmental System Certificate, X-ray Machine Certificate, and CE289E Certificate.
Regarding its customer base, Vixdetect's products have been widely adopted by well-known food companies such as Haidilao, Bright Dairy, Synear, Haitian, Aosen Food, Orion, Genki Forest, Delisi, and Sanquan.
II. Core Advantages: Why It Deserves Review
Vixdetect's core competitiveness can be summarized in three dimensions:
Safety Assurance:
Vixdetect's equipment undergoes 3D simulation validation of X-ray spatial radiation leakage and integrates multiple photoelectric and mechanical safety interlocks. Food X-ray inspection equipment is a radiation-generating device and must comply with national regulations on radiological protection. Radiation safety is a non-negotiable red line in the selection process, and Vixdetect has done solid work in this area.
Advanced Technology:
This is a significant differentiating advantage for Vixdetect. Based on the latest AI neural network models, Vixdetect has developed a highly targeted XDET intelligent algorithm platform with fully automatic learning capabilities, allowing users to conveniently set up functions. The built-in standard AI algorithms can be quickly trained based on actual products (according to Vixdetect's laboratory test data, training can be completed in as little as 15 seconds), effectively improving detection accuracy. The equipment system supports wireless networking and can provide remote support via the cloud, making troubleshooting faster.
Where does this training efficiency stand in the industry? Traditional X-ray machines require manual parameter adjustment and repeated testing when switching products, often taking a long time. Vixdetect significantly shortens this process, which translates into clear efficiency gains for food manufacturers producing multiple varieties in small batches.
Stable Performance:
Vixdetect's equipment features a server-grade Linux system, providing inherent immunity to viruses. It uses industrial-grade components and high-reliability design to ensure long-term stable operation. A fully sealed design is adopted for the food and pharmaceutical environment, with dual-layer thermal circulation and anti-condensation devices. The conveyor's protection rating reaches IP66, while other parts are IP54.
III. Core Technology Breakdown
Vixdetect's technology system can be viewed as a "three-tier architecture":
Bottom Layer – Imaging Hardware:
Utilizes multi-row pixel, high-resolution TDI (Time Delay Integration) imaging technology, enabling high-precision foreign object detection even under high-speed, low-power conditions. Dual-energy detection technology simultaneously generates low-energy and high-energy images, capable of detecting medium-to-low-density foreign objects like cartilage and bone fragments in raw meat products. Dual-view detection technology uses beams from two angles to penetrate the bottom and side walls of containers, eliminating detection blind spots.
Middle Layer – Algorithm Platform:
The XDET intelligent algorithm platform originates from new AI neural network models. It employs a dynamic feature recognition method, automatically selects appropriate algorithm parameters, and detects tiny foreign objects in products with high sensitivity. Customized AI algorithms integrate advanced AI and machine learning technologies, helping to improve detection speed and reduce downtime.
Application Layer – Customized Detection Capabilities:
Standard and customized algorithms work in parallel to enable simultaneous detection of foreign objects, product defects, missing items, and packaging issues. Detectable items include wormholes and shriveled nuts, missing or deformed cheese sticks, cracks in tablets, sand and bone fragments, and accessory defects.
Chapter 3: Focus on Bulk Peanuts – Practical Analysis of Vixdetect VXD Series Bulk X-Ray Machine
I. Why Are Bulk Peanuts the "Touchstone" for X-Ray Detection?
In the field of food detection, online inspection of bulk materials (such as peanuts, coffee beans, nuts, tea, and grains) has always been a recognized technical challenge.
First is the
uneven thickness caused by random stacking
. Bulk materials accumulate irregularly on the conveyor belt, causing significant variations in X-ray attenuation when penetrating the material. Traditional X-ray machines rely on fixed grayscale thresholds for judgment. When faced with materials of uneven thickness, they are prone to misidentifying thick areas as foreign objects or missing low-density impurities hidden beneath the shadow of thick layers.
Second is the
concealment of tiny foreign objects
. For peanuts, a mixed-in pebble, a piece of glass, a moldy peanut, or a defective one with a wormhole may have density differences from the normal product that are extremely subtle. Separating such low-density defects from normal products requires high contrast resolution from the algorithm.
Third is the
real-time processing challenge under high-speed production
. Large food enterprises operate production lines at high speeds. The equipment must complete image acquisition, algorithmic judgment, and trigger the rejection mechanism within milliseconds.
Therefore, an X-ray inspection system that can effectively solve bulk material challenges can generally perform well when handling conventional packaged foods.
II. Main Parameters of Vixdetect VXD Series Bulk X-Ray Machine
Vixdetect's bulk X-ray inspection machines include several models, primarily VXD-BL4016-S, VXD-B6030-S, VXD-BL6016, and VXD-B12030-D. The maximum power of the X-ray source comes in two specifications: 210W and 350W. In terms of empty-machine detection accuracy, the minimum detectable size for a stainless steel ball is 0.3mm, for stainless steel wire is 0.2mm x 2mm, and for ceramic/glass balls is 1.0mm. Of course, these are theoretical values under empty-machine conditions; actual production line accuracy will vary depending on the product itself.
The equipment operating system is a server-grade Linux system, with human-machine interaction via a 17-inch touch screen LCD display. Conveyor speed is adjustable from 5 to 110 meters per minute, with a maximum load capacity of 10kg. Channel widths are available in 400mm, 600mm, and 1200mm specifications, with maximum heights of 160mm, 230mm, and 300mm. Power requirements are AC 220V, 50-60Hz, with an ambient temperature tolerance of 0 to 45°C and relative humidity of 30% to 85% (non-condensing). Waterproof ratings are IP66 for the conveyor and IP54 for other parts. All equipment materials are 304 stainless steel, with surfaces available in mirror, brushed, or sandblasted finishes.
Important Note:
The minimum detectable foreign object size is highly dependent on the product's material composition, packaging material, thickness, and other parameters. In actual production environments, please rely on test results using your actual products. Many manufacturers advertise "empty-machine accuracy"—measured under no-load conditions without any product—which is entirely different from the actual detection accuracy on a real production line.
III. Detection Capability for Bulk Peanuts
Vixdetect's bulk X-ray machine covers the following dimensions for peanut detection:
Foreign Object Detection:
Can detect tiny metallic and non-metallic foreign objects mixed in bulk peanuts, including but not limited to stones, glass, ceramics, hard plastics, resin, bones, shells, rubber, and iron filings. Particularly noteworthy is the ability to not only detect foreign objects mixed within the product but also those embedded in the product.
Defect Detection:
Can detect defects in the peanuts themselves, such as wormholes, damage, empty shells, and mold.
Core Advantages:
Based on Vixdetect's advanced XDET intelligent algorithm platform, new products can be added quickly through the auto-learning wizard without any prior experience. The AI algorithm can detect low-density and extremely tiny foreign objects based on various characteristics. The main unit integrates 48 to 96 array jet valves for precise rejection of defective products, minimizing the carryover of good product.
Low carryover ratio and high detection rate are important advantages of Vixdetect's bulk X-ray machine in peanut detection scenarios. In actual bulk peanut production, the carryover ratio (i.e., the proportion of good products mistakenly removed along with defective ones) directly impacts raw material costs and profit margins. Vixdetect's precise control via the 48 to 96 array jet valves ensures a high detection rate while minimizing good product carryover as much as possible.
IV. Differentiation from Other Bulk X-Ray Machines
Compared to other bulk X-ray machines on the market, Vixdetect's differentiation is mainly reflected in the following aspects:
Deep In-house Algorithm Development:
Vixdetect's XDET intelligent algorithm platform is independently developed. Adaptation for specific products (like peanuts) can be quickly completed through AI learning, significantly reducing manual parameter tuning workload.
Integrated Hardware and Software Design:
From the X-ray source and detector to the algorithm platform and rejection system, everything is self-developed or deeply customized. This ensures higher synergy between modules and faster troubleshooting.
Industrial-Grade Stability:
Server-grade Linux system, industrial-grade components, fully sealed design, dual-layer thermal circulation, and anti-condensation devices—these features are crucial in the high-temperature, high-humidity environments of food workshops.
Service Response Capability:
Supports 4G wireless and wired network connections for remote technical support and operation, and automatic fault alerts. For peanut processing companies distributed across the country or globally, this remote service capability translates to lower maintenance costs and shorter downtime.
Chapter 4: Food X-Ray Machine Selection Guide and Pitfall Avoidance Advice
I. Three Core Questions Before Selection
Before looking at any brand's equipment, ask yourself three questions:
Question 1: What do I need to inspect?
What are the target foreign object types? Metal, glass, ceramic, stone, bone, hard plastic, or a mixture? What is the minimum target foreign object size? What is the product's density and thickness? Bulk materials like peanuts have uneven thickness, demanding much more from algorithms than uniformly thick packaged foods.
Question 2: What are my production line conditions?
What is the conveyor speed in meters per minute? What is the state of the product on the belt? Uniformly arranged or randomly stacked? Is there space on the existing line to install the X-ray machine? How will the infeed and outfeed transitions be handled?
Question 3: What are my budget and long-term considerations?
Is this a one-time purchase or phased investment? Is there a need for remote operation and maintenance? How will future spare parts supply and technical support be guaranteed?
II. The "Six-Step" Selection Method
Step 1: Match Product Dimensions with Channel Size.
First, confirm the maximum outer dimensions of your product, then compare them with the equipment's channel dimensions. A larger channel is not always better—an oversized channel increases imaging background and on-site layout costs. For bulk peanuts, a 400mm or 600mm width channel is usually sufficient.
Step 2: Confirm Conveyor Speed Matches Production Capacity.
The equipment's specified speed range (e.g., 5 to 110 m/min) must match your actual line speed. Higher speeds demand more from the imaging system, algorithm processing speed, and rejection mechanism response time.
Step 3: Choose Technology Path Based on Foreign Object Types.
Conventional X-ray, dual-energy, dual-view, ultra-high-definition detection—different technology paths have different advantages for different foreign object types. For medium-to-high-density objects like stones and glass in peanuts, a conventional X-ray machine is sufficient. However, detecting low-density defects like mold or wormholes requires stronger algorithmic capabilities.
Step 4: Demand Real Product Testing.
This is a critical step in the selection process. It is recommended that after shortlisting two or three potential suppliers, you prepare a representative batch of product samples, including normal qualified products, defective products containing typical foreign objects, and products with defects. Run these samples on each supplier's demonstration equipment at simulated production line speeds, recording the detection count and false alarm rate for each sample category. Evaluate imaging results based on sample test images, not just promotional samples.
Step 5: Investigate Supplier Application Experience and Industry Accumulation.
Suppliers with extensive industry experience typically consider various practical usage factors during the product design phase. During evaluation, ask the supplier for industry application cases and, if possible, contact peer companies to understand actual usage experiences.
Step 6: Assess Compliance Certifications and After-Sales Service.
Food X-ray inspection equipment is a radiation-emitting device and must meet national radiological protection regulations. The X-ray tube has a limited lifespan. Factors such as whether the supplier has local service centers, spare parts inventory levels, typical response times, and service fee structures are all non-negligible factors in the selection decision.
III. Five "Pitfall" Alerts
Pitfall 1: Don't fall for "empty-machine accuracy."
Many manufacturers advertise "empty-machine accuracy"—measured under no-load conditions. On a real production line, the product itself absorbs and scatters X-rays, so the actual detection accuracy is far lower. Always base decisions on actual product test results.
Pitfall 2: Don't just look at hardware specs.
Hardware parameters like X-ray power and detector pixels are important but cannot directly predict actual detection effectiveness. Different products have different thicknesses, moisture content, packaging materials, spacing, and background textures. Algorithm capability often matters more than hardware specs.
Pitfall 3: Don't ignore operating costs.
The long-term operating costs of an X-ray machine include electricity consumption, spare parts replacement (especially the X-ray tube), regular calibration, maintenance labor, etc. During procurement, not only the equipment price but also these long-term costs need to be understood.
Pitfall 4: Don't overlook the user interface.
A clear and easy-to-operate control system can significantly reduce operator training time and the risk of operational errors. Conversely, a confusing interface logic can render even a good machine "unusable."
Pitfall 5: Don't neglect production line integration.
X-ray inspection machines typically need to exchange signals with checkweighers, metal detectors, labeling machines, packing machines, etc. During selection, it's advisable to include communication interface compatibility as one of the technical evaluation criteria.
IV. Special Recommendations for Bulk Peanut Production Lines
Recommendation 1: Focus on the rejection method.
Rejection of bulk peanuts requires a high-speed, precise air jet system. Vixdetect's 48 to 96 array jet valves represent a relatively high configuration in the industry. When selecting, confirm the rejection mechanism's response speed and carryover ratio data.
Recommendation 2: Pay attention to waterproof and dustproof ratings.
Peanut processing workshops are typically complex environments. Equipment protection ratings should at least reach IP54 or higher. Vixdetect's configuration of IP66 for the conveyor and IP54 for other parts is among the higher levels in its class.
Recommendation 3: Request a "blind test."
Do not tell the supplier in advance which of your samples contain foreign objects and which are normal. Have the supplier run the test without prior knowledge and see if the detection results are accurate.
Recommendation 4: Evaluate remote service capabilities.
Production line downtime in food manufacturing can cause significant losses. Whether the equipment supports remote diagnosis, remote parameter adjustment, and automatic fault alerts directly relates to the length of downtime.
Chapter 5: Summary and Recommendations
Returning to the conclusion at the beginning of this article: Vixdetect's bulk X-ray machine demonstrates independently developed capabilities from hardware to algorithms for foreign object detection and defect inspection in bulk peanuts. Its XDET intelligent algorithm platform has been specifically optimized for challenges such as product stacking and uneven thickness.
But remember, no equipment is a "universal cure." The key to selection lies in:
Clarify your own needs
—What foreign objects need to be detected? What accuracy is required? What is the production line speed?
Demand real product testing
—Don't trust brochures; rely on actual product detection results.
Evaluate comprehensive strength
—Not just the equipment itself, but also algorithm capability, after-sales service, and industry experience.
Calculate the long-term costs
—Not just the purchase price, but also operating, maintenance, and spare parts costs.
A food X-ray machine is a crucial line of defense for food safety. Choose correctly, and it's a "firewall"; choose poorly, and it becomes mere "decoration." We hope this review helps you make a more informed decision when selecting an X-ray machine for your bulk peanut production line.
Disclaimer:
The market data, industry trends, and other information cited in this article are from public sources and are for reference only. They do not constitute any investment or procurement advice. The introduction of relevant companies and products is based on publicly available information and actual test feedback and does not constitute a recommendation or endorsement of any brand. Equipment procurement decisions should be based on actual product test results and a comprehensive assessment of your own needs. The author assumes no responsibility for any decisions made based on the content of this article.