piezo diaphragm used in electronic thermometer
Publish Time: 2019-07-03 Origin: Site
The electronic thermometer consists of a temperature sensor, a liquid crystal display, a button battery, an ASIC and other electronic component piezo sounder ceramic element
. It can quickly and accurately measure the body temperature of human body. Compared with the traditional mercury glass thermometer, it has the advantages of convenient reading, short measuring time, high measuring precision, memory and buzzing, especially the electronic thermometer does not contain mercury. The surrounding environment is harmless and is especially suitable for use in homes, hospitals and other places.
The electronic thermometer uses the physical parameters of certain substances, such as resistance, voltage, current, etc., to determine the relationship between the body temperature and the ambient temperature. When the temperature rise rate is less .the "C" symbol stops flashing, and the thermometer emits a buzzer sound for about 5 seconds. At this time, the thermometer can be read and the displayed body temperature value can be read.The temperature measurement is completed. The piezoelectric diaphragm buzzer plays a role in the pronunciation reminder in the thermometer, and can promptly remind the completion of the temperature test.
The piezo bimorph is a piezo diaphram piezo element piece that is pressed by a high pressure and is attached to a vibrating metal piece. When an AC voltage is applied, mechanical deformation stretching and contraction occur due to the piezoelectric effect, and this characteristic is used to vibrate the metal piece to make an audible sound.