GV2-RS32C The application of sensors in the automation industryhttps://www.gsplcdcs.com/

Definition of sensor

A sensor is a device that converts a physical or chemical quantity into an electrical signal that is easy to use. According to the International Electrotechnical Committee (IEC), “A sensor is a pre-component in a measurement system that converts input variables into signals that can be measured.” According to Gopel et al., “A sensor is a sensitive element that includes a carrier and a circuit connection,” while “a sensor system is a system that combines some kind of information processing (analog or digital) capability.” Weighing sensor is an integral part of the sensing system, which is the first gateway through which the measured signal is input.

GV2-RS32C The sensor converts one form of energy into another. There are two categories: active and passive. Active sensors convert one form of energy directly into another without the need for an external source of energy or excitation.

Passive sensors cannot directly convert the energy form, but they can control the energy or excitation energy input from another input, and the sensor undertakes the work of converting the specific characteristics of an object or process into quantities. Its “objects” can be solids, liquids, or gases, and their states can be static or dynamic (i.e. procedural). Object properties can be detected in many ways after being transformed and quantified. The properties of an object can be physical or chemical in nature. According to its working principle, it converts object characteristics or state parameters into measurable electrical quantities, and then separates the electrical signals and sends them to the sensor system for evaluation or marking.

GV2-RS32C The basic torque sensor is formed by attaching a special torsion measuring plate to a special elastic shaft and forming a variable bridge. The shaft is fixed on: (1) the secondary coil of the energy toroidal transformer, (2) the primary coil of the signal toroidal transformer, and (3) the printed circuit board on the shaft, which contains the rectifier and stable power supply, instrument amplifier circuit, V/F conversion circuit and signal output circuit. Fixed on the housing of the sensor:

(1) excitation circuit, (2) primary coil of energy toroidal transformer (input), (3) secondary coil of signal toroidal transformer (output), (4) signal processing circuit

Working process

GV2-RS32C ±15V power supply is provided to the sensor, the crystal oscillator in the excitation circuit generates 400Hz square wave, the AC excitation power supply is generated through the TDA2030 power amplifier, and the energy toroidal transformer T1 is transferred from the stationary primary coil to the rotating secondary coil. The resulting AC power supply is passed through the rectification and filtering circuit on the shaft to the ±5V DC power supply. The power supply is used as the working power supply of operational amplifier AD822. The high precision voltage regulator power supply composed of the reference power supply AD589 and the dual operational amplifier AD822 generates a precision DC power supply of ±4.5V, which acts as both a bridge power supply and a working power supply for the amplifier and V/F converter. When the elastic shaft is twisted, the mV strain signal detected by the strain bridge is amplified into a strong signal of 1.5v±1v through the instrument amplifier AD620, and then converted into a frequency signal through the V/F converter LM131, and transmitted from the rotating primary coil to the stationary secondary coil through the signal toroidal transformer T2. After filtering and shaping the signal processing circuit on the housing, the frequency signal proportional to the torque of the elastic bearing can be obtained, and the signal is TTL level, which can be provided to the special secondary instrument or frequency meter display or directly sent to the computer for processing. Because there is only a few tenths of a millimeter gap between the dynamic and static rings of the rotary transformer, and the part of the sensor shaft is sealed in the metal shell, forming an effective shield, it has a strong anti-interference ability.

Sensor Classification Tilt sensor

GV2-RS32C Inclination sensors are widely used in military, aerospace, industrial automation, construction machinery, railway locomotives, consumer electronics, Marine ships and other fields. Whig provides domestic users with the world’s most comprehensive and professional product solutions and services. Provide more than 500 kinds of specifications of servo type, electrolyte type, capacitive type, inductor type, fiber optic type and other principles of tilt sensors.

2. The working principle of packaging machine

2.1 Composition of packaging machine

Weighing type automatic quantitative packaging machine is composed of feeding part, weighing part and unloading part. The feeding part is divided into storage hopper and gravity feeding device. The storage hopper is used to store the material that needs to be filled, and the gravity feeding device is mainly used to provide the material to the weighing hopper. The weighing part is the weighing bucket, which measures the weight of the material by connecting with the weighing sensor. The unloading part is used to complete the unloading and bagging process of standard weight materials.

2.2 GV2-RS32C Working Principle

When the material in the hopper is enough, it enters the gravity feeding device under the action of gravity, and completely opens the feeding door into the large feeding state. When the given large feed weight is reached, the feed door is closed, leaving a slit and entering the small feed state. When the given small feeding weight is reached, the feeding door is completely closed, after a certain amount of air feeding, the weighing bucket is stable, and the bag clamping mechanism is tight, the unloading door opens, the material enters the hopper, and then falls into the bag, completing a packaging cycle.

3. Hardware design of control system

The system is mainly controlled by switching quantity, all the action of the feed door is driven by the cylinder, and the cylinder is controlled by the corresponding solenoid valve. The equipment can be operated either manually or automatically. Manual operation requires the use of buttons for each step of the machine to operate separately. Automatic operation requires pressing the automatic/manual selection switch, and the machine automatically and continuously cycles periodically. If the stop button is pressed during work, the machine continues to complete a cycle of action and automatically stops after returning to the initial state.