What is a transmitter The principle of the transmitter and the manufacturer

What is a transmitter? Generally speaking, we usually call a sensor as a sensitive component. Its main function is to convert the measured physical quantity into an electrical signal. The thermistor is of this type, which can convert temperature into a change in resistance signal. The transmitter is a conditioning circuit unit that converts the output signal of the non-standard sensor into a standard voltage or current signal after processing and adjustment, so that it can facilitate the collection of data acquisition equipment such as digital instruments, PLCs and computers.

In fact, there are many types of transmitters. Generally speaking, the transmitter sends out a signal to prompt the secondary meter to display measurement data. The classification of transmitters includes temperature/humidity transmitters, pressure transmitters, current transmitters, weight transmitters, differential pressure transmitters, flow transmitters, liquid level transmitters, and power transmission And so on.

No matter which kind of transmitter, it will follow a physical law (or experimental mathematical model) to convert the change of physical quantity into a device such as 4-20mA standard signal. What is a transmitter? The sensor signal can be converted into a unified standard signal 0/4-20mADC, 1-5VDC, 0-10VDC, and it also has the function of sensing and amplifying and shaping.

The function of common current transmitter: In fact, the purpose of the transformer that we often contact is the same. In order to connect to the secondary instrument, the current transmitter converts a large AC and DC current signal into a 4-20mA standard signal and provides it to the PLC In addition, DC transmitters can be said to be current transmitters. The wire with large current passes through the perforation of the current toilet, and the current value of the wire is measured at the output of the device.

For example: proportional transmission of the signal (5A becomes 4-20mA, 1-5VDC becomes 4-20mA) or isolated transmission (4-20mA becomes 4-20mA). The reason for such processing is that some of our signal processing parts can only accept specific signals. For example, an external pressure signal sent out is 1V to 5V, and the signal receiving processing can only be 4-20mA. Therefore, it is necessary to use the transmitter to convert the external signal.

The function of the transmitter: Simply speaking, it can detect the process parameters and transmit the measured value in a specific signal form for display and adjustment.

Transmitter principle: the output analog signal of non-standard sensor can be converted into standard signal. Then it is a transmitter. The specific working principles and methods are resistive, inductive, magnetoelectric, photoelectric, piezoelectric, Capacitive, vibration frequency, magnetoelastic, eddy current, etc. The traditional output DC signal of the transmitter has 0-5V, 0-10V, 1-5V, 0-20mA, 4-20mA, etc. So far, 4-20mA current is widely used to transmit analog quantity. The so-called "change" refers to the conversion of various physical quantities from the sensor into an electrical signal. For example: using thermocouples to convert temperature into electric potential; using current transformers to convert large currents into small currents. Since electrical signals are the easiest to process, modern transmitters convert various physical signals into electrical signals. Therefore, the transmitter we are talking about usually becomes "electric".

The so-called "send" means to unify the electrical signals from the sensors through electronic circuits in order to facilitate the reception and transmission of various electrical signals by other instruments or control devices (for example, 4-20MA). The method is achieved through multiple operational amplifiers. This "change" + "send" constitutes the most commonly used transmitter in modern times.

Transmitter manufacturer

Delixi Electric Co., Ltd. was established in 2007 and is located in the "Capital of Electric Appliances of China"-Liushi Town, Yueqing City, Wenzhou, Zhejiang Province, with a cumulative investment of nearly 2 billion yuan, covering an area of 600,000 square meters and employing more than 10,000 people Employees, is a large joint venture in China's low-voltage electrical industry. Through the unremitting efforts of two generations of Delixi people for 30 years, the "Delixi" brand has become a household name in China. Since the joint venture, the company has developed rapidly. It has an innovation center, two industrial production bases, and 3 7 R&D centers, 7 domestic regional sales offices, 13 domestic regional logistics service centers, 2 global logistics service centers, 19 sales offices, 28 on-site service outlets, more than 40,000 domestic sales stores, and products are sold to More than 60 overseas countries. The CDBS series single-phase current and voltage transmitters of Delixi transmitter manufacturer comply with the GB/T13850 standard, and are widely used in power automation, smart box transformers, complete cabinets and power distribution stations.