Can Liquid Level Detection Machine

1.Automatically adapt to the speed of different production lines, dynamic inspection

2.No radioisotope source, and uses soft ray design.Ray protection is safe and reliable

3.Using hardware circuit design, self-developed inspection software, high degree of optimization,fast processing speed, the maximum speed of up to 72000 BPH

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Product Details

I. Project Overview

Project Title:
Automated Liquid Level Inspection and Rejection System

Project Description:
The system is designed for continuous in-line monitoring of liquid levels in individual containers, enabling accurate identification of underfilled or overfilled products and reliable automatic rejection of non-conforming containers.

Maximum Throughput:
Up to 72,000 containers per hour, depending on the selected high-speed configuration and actual production conditions.

Applicable Container Materials:
The system is suitable for a wide range of packaging materials, including aluminum, tinplate, PE, PET, PP, ceramic, glass, and other commonly used container materials.

Applicable Product Specifications:

Nominal Volume: 200–2,000 mL
Container Diameter: 30–90 mm
Container Height: 50–200 mm

Equipment Model:
Can Liquid Level Inspection Machine

Liquid Level Inspection

II. Environmental and Site Conditions

1. Installation Altitude

The equipment is suitable for installation at elevations ranging from 5 to 3,000 meters above sea level.

2. Ambient Operating Temperature

5°C–40°C

3. Relative Humidity

50%–65% RH

4. Site Preparation Requirements

The installation area shall provide a level, stable, and adequately load-bearing foundation. Floor conditions and other relevant infrastructure requirements shall comply with applicable national standards to ensure safe and reliable equipment operation.

5. Storage and Preservation

After delivery, the complete equipment and associated components shall be stored under conditions meeting applicable national standards. For equipment kept in storage before installation, regular lubrication, inspection, and protective maintenance shall be carried out to prevent corrosion, surface deterioration, deformation, or other damage that could adversely affect installation, commissioning, or subsequent operation.

III. Utilities and Production Requirements

1. Electrical Supply

220 VAC, 50 Hz, single-phase

The power supply shall be provided by the customer. Any special voltage requirements must be confirmed prior to equipment design and manufacturing, as changes to the standard electrical specification may affect the equipment configuration, production schedule, and final price.

2. Rated Power Consumption

Approximately 1.0 kW

3. Control Voltage

24 VDC

4. Compressed Air Supply

4–12 Pa

The customer shall provide the compressed-air pipeline and connection from the plant air source to the main equipment unit.

Note: Please verify the pneumatic pressure unit before finalizing the technical specification. 4–12 Pa is extremely low for conventional industrial pneumatic systems and may have been intended to indicate 4–12 bar or 0.4–1.2 MPa.

IV. Equipment Description

1. Installation Requirements

Installation Location

The inspection machine shall be positioned downstream of the filling machine, either upstream or downstream of the inkjet printer, depending on the actual production-line configuration.

Conveyor Requirements

The equipment shall be installed on a single-row conveyor chain. A straight conveyor section of at least 2 meters shall be available at the proposed installation location to provide sufficient space for equipment installation and stable container positioning.

Installation Schedule

On-site installation is expected to be completed within 24 hours, subject to the site being properly prepared in advance.

Conveyor Modification

An opening of no more than 150 mm shall be provided in the conveyor guide rail along the straight section to allow the rejection mechanism to discharge defective containers smoothly.

Main System Components

The complete inspection system mainly consists of:

Liquid level inspection unit
Automatic rejection unit
Electrical/power distribution cabinet
HMI operating interface
Electronic control modules
Mechanical assemblies and supporting components

Rejected Product Handling

The purchaser is advised to provide a rigid collection container at the rejection outlet for convenient collection and handling of non-conforming products.

2. Inspection Capabilities

The system provides the following liquid-level inspection functions:

Low liquid level detection — Standard function
High liquid level detection — Optional/Auxiliary function

The actual inspection limits can be configured according to the customer's product specifications and quality requirements.

3. Operating Principle

The equipment utilizes X-ray transmission technology to determine the liquid level inside the container.

As X-rays pass through containers containing different amounts of product, the transmitted radiation intensity received by the detector varies accordingly. These differences are converted into measurable signals and processed by the system.

The measured values are compared with the predefined reference parameters configured by the user. When the detected liquid level falls outside the permitted range, the system identifies the container as non-conforming and sends the corresponding signal to the automatic rejection mechanism.

The defective container is subsequently removed from the production line at the designated rejection position.

4. Main Technical Features

Non-Contact Inspection

The system performs non-contact liquid level measurement, eliminating physical contact with the container and preventing damage or contamination during inspection.

Accurate Product Tracking

Container tracking is based on an encoder coupled to the synchronous drive system, allowing the equipment to maintain accurate rejection positioning even when the production line experiences temporary stoppages or variations in conveying speed.

Adaptive High-Speed Inspection

The system can accommodate different conveyor speeds and continuously adjust its inspection timing to maintain real-time detection performance during production.

Separated Control Architecture

The inspection and control functions are arranged in independent cabinets, helping reduce electromagnetic interference and improving the overall stability and reliability of the electrical system.

Sealed Stainless-Steel Construction

The equipment enclosure is manufactured from stainless steel and adopts a sealed structural design. This provides effective resistance to moisture, condensation, mist, and water droplets, making the machine suitable for demanding production environments.

Automatic X-Ray Standby Protection

When the production line is idle, the system can automatically stop X-ray emission, reducing unnecessary radiation exposure and power consumption while improving equipment safety.

Embedded Control System

The equipment combines dedicated hardware circuitry with an embedded operating system, providing reliable long-term operation and reducing the impact of general-purpose computer system failures on production.

Audible and Visual Alarms

An integrated sound-and-light alarm system provides immediate notification of equipment abnormalities or inspection-related events.

Automatic Defect Rejection

Once a non-conforming container is identified, the system automatically generates a rejection signal and activates the reject mechanism to remove the defective product from the production flow.

Can liquid level detection machine

V. Technical Specifications

Item

Specification


Maximum Conveyor Speed	≤ 1.6 m/s
Applicable Container Diameter	20–120 mm
Dynamic Detection Resolution	±1.5 mm
Static Detection Resolution	±1.0 mm
Rejection Accuracy	≥99.99% at up to 400 containers/min
Operating Temperature	0°C–40°C
Relative Humidity	≤95% RH at 40°C
Power Supply	220 VAC ±20 V, 50 Hz

Note: The applicable equipment model shall be selected according to the container dimensions, material characteristics, product density, and actual production requirements. Dynamic measurement accuracy may be influenced by factors such as foam, liquid agitation, or unstable product surfaces.

VI. Cap Inspection Principle

The system incorporates a high-speed Gigabit digital camera installed above the production line to acquire top-view images of the can lids. The captured images are transmitted to the vision-processing system, where advanced digital image analysis and 360-degree template matching are performed to evaluate the orientation and positioning of each cap.

When a can with an abnormal cap angle is identified, the system immediately generates a defect signal and activates the automatic rejection mechanism, allowing the defective can to be removed from the production line without interrupting normal production.

Inspection Sequence

1. Can Detection and Registration

As a can enters the inspection area, the positioning sensor detects its arrival and initiates the inspection sequence. The control system assigns a corresponding tracking ID to the can and records its real-time position based on the encoder feedback.

2. Image Acquisition

The positioning signal triggers the Gigabit digital camera to capture a top-view image of the can cap. The image is transmitted through the network to the vision-processing unit for further analysis.

3. Image Processing and Evaluation

The image-processing system analyzes the captured image and compares the detected cap position and orientation with the predefined reference template. The inspection result is simultaneously transferred to the HMI (Human-Machine Interface) for real-time monitoring and to the control system for subsequent rejection control.

4. Automatic Rejection

If the cap is determined to be outside the specified angle or position range, the control system associates the defect result with the corresponding can ID. When the defective can reaches the designated rejection point, the rejector is activated at the appropriate timing and automatically removes the non-conforming can from the production line.

This synchronized process provides reliable cap inspection, product tracking, defect identification, and automatic rejection for high-speed canning applications.

VII. Equipment Configuration and Inspection Performance

A. Equipment Information

Equipment Name:
Can Cap Inspection Machine

Model:
MT-YLG-PG-C1

Maximum Applicable Production Rate:
60,000 cans/hour

Inspection Function:
Online inspection of can cap orientation and related cap-position defects

Rejection Method:
Automatic removal of cans identified as defective by the vision inspection system

Protection Rating:
IP65

B. Application

The machine is designed for high-speed canned beverage production lines and can be used to inspect a variety of can lid configurations. It provides continuous online monitoring of cap positioning and automatically removes cans that do not meet the predefined quality requirements.

C. Key Benefits

Reduces manual inspection requirements, lowering labor dependency and associated operating costs.
Improves production efficiency through continuous automated inspection without interrupting the production flow.
Enhances product quality and consistency by applying standardized inspection criteria to individual cans.
Provides real-time defect detection and automatic rejection, minimizing the risk of defective products proceeding to downstream processes.
Supports high-speed production environments, with an applicable production rate of up to 60,000 cans per hour.
Inspection performance and equipment quality are designed in accordance with the manufacturer's applicable technical specifications and quality standards.