High Voltage Power Amplifier for Ultrasonic Gas Detection Applications
Update time：2021-07-05 15:33:44Clicks：1485second
Before introducing how high-voltage power amplifiers are used in ultrasonic gas detection, let's first understand the ultrasonic gas detection technology and its composition principles.
Compared with the traditional ultrasonic gas detection method, the emerging technology adds a pair of ultrasonic sensors. This pair of sensors is placed in the unmixed background gas, and the distance between the sensors is exactly the same as that of the other pair of ultrasonic sensors. In this way, the synchronously emitted ultrasonic waves reach the receiving end through two equidistant paths, one path passes through the mixed gas of the concentration to be measured, and the other path passes through the pure background gas as a reference, as shown in the following figure. The phase difference and sound propagation time of the two received signals are measured at the receiving end, and the concentration value of the mixed gas can be obtained after the phase difference and time information are processed by calculation.
Schematic diagram of collection chamber
The Composition and Principle of Ultrasonic Gas Detection
The reference cavity is closed and filled with air. A pair of transmitting/receiving ultrasonic piezoelectric sensors are installed inside, and the pair of piezoelectric sensors are separated by a certain distance. The internal space of the sampling cavity is the same as that of the reference cavity, but its surface is open or connected to the external environment through a micro-pump, and it is always consistent with the surrounding environment. A pair of ultrasonic piezoelectric sensors and two piezoelectric sensors are also installed inside it. The distance between the sensors is strictly equal. The transmitting ultrasonic sensor converts electrical energy into acoustic energy, and the receiving sensor converts the acoustic energy into electrical signals. Since the reference cavity is airtight, the internal gas will not be polluted by the outside world. The sampling chamber samples the mixed gas from the surrounding environment. Since the difference in the propagation medium between the sensors will cause the ultrasonic propagation speed to be different, the difference in the ultrasonic propagation time in the two cavities can be compared to obtain information about the changes in the gas composition in the surrounding environment.
The circuit part mainly includes ultrasonic power transmitting circuit, ultrasonic receiving circuit, signal processing peripheral circuit and so on.
Among them, the ultrasonic power transmitting circuit is located in the high-voltage power amplifier, and the high-voltage power amplifier outputs the power required to transmit ultrasonic waves.
For the application of ultrasonic gas detection, CoreMorrow provides a variety of high-voltage power amplifiers with voltages ranging from 0 to 1800V and bandwidths up to megahertz. Typical parameters are shown in the table below.
|
Voltage |
Current |
Bandwidth （-3dB） |
|---|---|---|
|
200Vp-p |
500mA |
1MHz |
|
300Vp-p |
100mA |
1MHz |
|
400Vp-p |
100mA |
1MHz |
|
500Vp-p |
100mA |
1MHz |
CoreMorrow has specialized in research and development, production and sales of high-voltage power amplifiers for nearly 20 years. There are hundreds of models of high-voltage power amplifiers produced. The range of optional parameters is also very wide and can be flexibly customized.
The following is examples of CoreMorrow's high-voltage power amplifier.
• E00/E01 High Voltage Power Amplifier
• 400W High Voltage Power Amplifier
• Hundred-channel High-Voltage Power Amplifier
• 800V High Voltage Power Amplifier
• Industrial High Voltage Power Amplifier
Focusing on the development of the nanotechnology industry, CoreMorrow is based on precision positioning technology with independent intellectual property rights, extensively absorbing international advanced technology experience, pioneering and innovating, constantly breaking through industry technical barriers, providing personalized solutions for domestic and foreign customers, and assisting customers in overcoming technology difficulties to realize the common improvement of corporate value and customer value.
- Previous article：P66A.X30 Small Size X-direction Motion Piezo Stage
- Next article：Contraction Type Piezo Actuator
Sweep, get the latest information on core tomorrow
Address：1F, Building I2, No.191 Xuefu Road, Nangang District, Harbin, China
Tel：0451-86268790
Piezo · Nano · Motion
Copyright@ CoreMorrow Ltd. 黑ICP备16009173号-1