Gold inspection and re inspection integrated machineIt is a device that combines metal detection and weight detection functions. It can simultaneously complete the detection of whether the product contains metal foreign objects and whether the weight meets the standard in the same production process. It mainly consists of a metal detection part, a weight sorting part, and a conveying and removal device. Among them, the metal detection part uses the principle of electromagnetic induction to generate a stable electromagnetic field through a coil. When a metal object passes through this magnetic field, it will break the magnetic field balance, produce small current changes, and then be sampled and processed by the microprocessor to issue an alarm prompt. The weight selection part detects the weight of the item through a weight sensor and transmits the weight analog signal to the internal DSP control part for recognition and processing. It compares with the set range to select qualified products and eliminate unqualified products.

　　Gold inspection and re inspection integrated machineIts components mainly include the following parts:

1、 Metal detection section

sensor

Electromagnetic induction sensor: using the principle of electromagnetic induction to detect metals. When products containing metal impurities pass through sensors, the metal object will cause magnetic field disturbance, and the sensor can detect this change and convert it into an electrical signal. This type of sensor has a certain detection ability for both ferromagnetic metals (such as iron, steel, etc.) and non ferromagnetic metals (such as copper, aluminum, etc.), but the detection sensitivity may vary depending on the type and shape of the metal.

Eddy current sensor: operates based on the eddy current effect. When a metal object moves in an alternating magnetic field, eddy currents are generated inside the metal, and the magnetic field generated by the eddy currents will counteract the original magnetic field. By detecting this change, the metal can be identified. Eddy current sensors are sensitive for detecting non ferromagnetic metals and are commonly used to detect impurities in non-ferrous metals.

signal processing system

Amplifier: amplifies the weak signal detected by the sensor for subsequent processing and analysis. The performance of an amplifier directly affects the sensitivity and accuracy of detection, and it needs to have characteristics such as high gain and low noise.

Filter: Used to filter out clutter and interference components in the signal, improving the signal-to-noise ratio of the signal. For example, power noise, environmental electromagnetic interference, etc. can be filtered out to make useful signals clearer.

Processor: processes and analyzes the amplified and filtered signal to determine the presence of metal impurities, as well as the position, size, and other information of the metal. The processor usually uses a microprocessor or digital signal processor (DSP), which can run complex algorithms for signal processing and judgment.

Alarm and display device

Alarm light: When metal impurities are detected, the alarm light will light up, usually with different colored lights indicating different warning levels. For example, a red light indicates the detection of serious metal pollution and requires immediate shutdown for processing; The yellow light may indicate the detection of trace metals, but the product can still be observed and used.

Sound alarm: emits a sound alarm to alert operators to the presence of metal impurities. The frequency and loudness of the sound alarm can be set as needed to adapt to different working environments.

Display screen: It displays relevant information about metal detection, such as the type of metal detected (iron, non-ferrous, etc.), metal location, signal strength, etc. It can also display the operating status of the equipment, set parameters, and other information, making it convenient for operators to monitor and operate.

2、 Weight detection section

weighing module

Weighing sensor: It is the core component of weight detection, usually using strain gauge sensors. When the product is placed on the weighing platform, the weighing sensor will be subjected to pressure and produce strain, and the resistance value of the strain gauge will change. The weight of the product is calculated by measuring the resistance change. The accuracy and sensitivity of weighing sensors directly affect the accuracy of weight detection, and generally require regular calibration and maintenance.

Weighing platform: provides stable weighing support for products, usually made of sturdy materials such as stainless steel to ensure their flatness and stability. The size and shape of the weighing platform will be designed according to the type and size of the tested product to ensure that the product can be accurately placed on the platform for weighing.

Analog to Digital Converter (ADC): converts the analog signal output by the weighing sensor into a digital signal for processing and analysis by the processor. The accuracy and sampling frequency of the analog-to-digital converter will affect the accuracy and speed of weight detection. Generally, it is necessary to choose an analog-to-digital converter with appropriate accuracy and speed to meet production requirements.

Signal Processing and Analysis System

Processor: processes and analyzes the digital signal transmitted by the weight sensor, and determines whether the product weight is qualified based on the preset weight standard. The processor calculates the weight value of the product and compares it with the set weight range. If the product weight is within the qualified range, it is judged as a qualified product; If it exceeds the range, it will be judged as an unqualified product and trigger the corresponding alarm and removal device.

Weight standard setting device: allows operators to set the weight qualification range according to the requirements of the product, including upper limit weight and lower limit weight. It can be set through touch screen, buttons and other methods, and can store weight standard parameters of various products, making it convenient for testing different products.

Alarm and exclusion device

Alarm indicator light: Similar to the metal detection part, when the weight of the product is detected as unqualified, the alarm indicator light will light up to remind the operator to pay attention.

Sound alarm: emits a sound alarm to indicate abnormal weight conditions.

Removal device: usually using pneumatic or mechanical methods to remove non-conforming products from the production line. For example, the pneumatic removal device can push the removal arm through a cylinder to push the unqualified products into the defective product collection tank; Mechanical removal devices may use flipping mechanisms, belt conveyors, and other methods to separate non-conforming products, ensuring that qualified products can continue to enter the next production process.

3、 Mechanical structure and transmission system

Rack: As the supporting structure of the entire all-in-one machine, it is usually made of metal material (such as stainless steel), which has good strength and stability, and can withstand various forces and vibrations during the operation of the equipment. There are various components installed on the rack, including metal detection part, weight detection part, conveyor system, etc., providing a solid foundation for the normal operation of the equipment.

Conveyor belt: used to transport products through metal and weight detection areas, usually made of rubber, plastic, or metal materials, with a flat surface and certain friction to ensure that the products can run stably on the conveyor belt. The speed of the conveyor belt can be adjusted according to production needs to meet the testing speed requirements of different products.

Motor and transmission device: provide power for the conveyor belt and drive it to operate. Electric motors are usually AC or DC motors, and the power of the motor is transmitted to the conveyor belt through transmission devices such as pulleys, chains, etc., to achieve continuous conveying of products. The transmission device needs regular maintenance and lubrication to ensure its normal operation and transmission efficiency.

4、 Electrical control system

Control cabinet: It is the core part of the electrical control system, containing various electrical components and controllers, such as power switches, relays, contactors, fuses, etc. The control cabinet is responsible for providing power supply to the equipment and controlling and managing the electrical components to ensure the safe and stable operation of the equipment.

Electrical circuit: The main part that connects various electrical components and equipment, including power lines, signal lines, control lines, etc. Electrical circuits need to be arranged and fixed reasonably to avoid confusion and interference, while ensuring good insulation performance to prevent accidents such as leakage and short circuits.

Operation panel: located in a convenient position for device operation, usually including touch screen, buttons, knobs and other operating elements. Operators can perform various operations on the device through the operation panel, such as starting, stopping, parameter setting, status viewing, etc. The operation is simple, convenient, and easy to get started.

5、 Software system

Detection software: used to control and manage the functions of metal detection and weight detection, including data acquisition, processing, analysis, judgment, and other processes. The detection software can display real-time detection results, product information, equipment status, etc., and can be set and adjusted according to the needs of the operator, such as detection sensitivity, weight standards, alarm methods, etc.

Data processing and storage software: responsible for processing and storing detection data for subsequent queries, statistical analysis, and quality traceability. Data processing software can organize, classify, and statistically analyze detection data, generate various reports and charts, and provide a basis for production management and quality control. Storage software can store detection data on local hard drives or network storage devices to ensure data security and integrity.