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The weighing sensor manufacturer explains its frequency

In the daily contact process of the sensor, we will encounter a lot of nouns about frequency. The following is a summary and explanation of the frequency of the sensor by the load cell manufacturer Ocean.

Resonance frequency : In other data, it is also called natural frequency, natural frequency, English: Resonance frequency/Natural frequency, which is determined by the material and structure of the sensor, and is the frequency at which the sensor can resonate. Resonance phenomenon means that the external vibration frequency forces the sensor to generate spontaneous vibration. When the vibration amplitude reaches the limit, it is resonance. This phenomenon is a very dangerous phenomenon, and the resonance will cause serious heat generation and structural damage. It is necessary to avoid this frequency during the use of the sensor, which is generally used below this frequency. Most foreign data labels are related to the frequency of the resonance frequency.



Frequency response: literally, it is the response frequency, which means that the ability of the sensor to give a signal within a certain period of time is called the frequency response. That is to say, when the sensor is subjected to external pressure, the number of times the sensor is pressed per unit time is When the number of times the sensor outputs a valid signal reaches a match, this frequency is the frequency response of the sensor. Theoretically: the frequency response of the sensor has a certain relationship with the resonant frequency. The frequency response of the sensor is 1/4-1/6 of the resonant frequency. So when you know the resonant frequency, you can roughly calculate the frequency response of the sensor. This is the theoretical value I am looking for. I have not done any experimental verification. Therefore, this data is a conservative data. I do not emphasize the requirement of the data to be sent to the customer and try to avoid it. The larger the general range, the higher the frequency response.


Bandwidth: Bandwidth is not the characteristic data of the sensor. It is a technical indicator of the analog amplifier. It refers to the amount of data of the signal that the amplifier can amplify per unit time. That is, when the sensor transmits the signal to the amplifier, the amplifier needs a large enough bandwidth to amplify the data transmitted by the sensor. At present, our products can meet the requirements of all our current sensors.


Sampling frequency: refers to the acquisition frequency of the acquisition card per unit time, that is, the ability of the acquisition card to collect data in unit time when the sensor or amplifier gives the acquisition card signal.