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Time: 2024-08-18  maya

Lock Hall sensor power supply current supplier Weikewei

Lock Hall sensor power supply current supplier Weikewei Release: Weikewei Technology

Linearity:
Definition: Linearity(Linearity)It refers toLock Hall sensor power supply currentThe degree of deviation between the input-output curve and the ideal straight line.

unscramble1The ideal input-output relationship of a sensor should be linear, and its input-output curve should be a straight line (as shown by the red line in the figure below).

However, in reality, sensors have various errors to varying degrees, resulting in the actual input-output curve not being an ideal straight line, but rather a curve (as shown by the green curve in the figure below).

Linearity refers to the degree of difference between the actual characteristic curve of a sensor and the offline line, also known as nonlinearity or nonlinear error.

unscrambletwoDue to the difference between the actual characteristic curve and the ideal straight line of the sensor in different sizes of measured situations, the difference between the two is often measured over the full rangezuiThe ratio of maximum value to full-scale value. Obviously, linearity is also a relative quantity.

unscramblethreeDue to its suitability for general measurement scenariosLock the power supply current of the Hall sensorThe ideal straight line is unknown and cannot be obtained. For this reason, a compromise approach is often adopted, which is to directly use the measurement results of the sensor to calculate a fitting line that is closer to the ideal line. The specific calculation methods include endpoint connection methodzuiGood straight line methodzuiBinary multiplication, etc. The magnetic permeability of a magnetic core is proportional to the saturation level, so the inductance also changes. The flux gate sensor detects current by analyzing changes in inductance value. The larger the current, the smaller the inductance; The smaller the current, the larger the inductance.

Lock Hall sensor power supply current供應商韋克威

Stability:
Definition: Stability(Stability)It refers to the ability of a sensor to maintain its performance over a period of time.

unscramble1Stability is the main indicator for testing whether a sensor works stably within a certain time range. The factors that lead to sensor instability mainly include temperature drift and internal stress release. Therefore, measures such as increasing temperature compensation and adding aging treatment are helpful in improving stability. The current sensing technology based on current transformers is mainly used in power grids due to its high current measurement capability. Few clamp meters also use current transformers to measure alternating current.

unscramble2Stability can be divided into short-term stability and long-term stability based on the length of the time period. When the examination time is too short, stability and repeatability are close. Therefore, stability indicators mainly examine long-term stability. The specific duration will be determined based on the usage environment and requirements.

unscramble3The quantitative representation method of stability indicators can use both absolute error and relative error. For example, the stability of a strain gauge force sensor is0.02%/12h.

鎖存霍爾傳感器供電電流供應商韋克威

Sampling frequency:
Definition: Sampling frequency(Sample Rate)It refers to鎖存霍爾傳感器供電電流How many measurement results can be sampled in a unit of time.

unscramble1The sampling frequency reflects the rapid response capability of the sensor and is an important dynamic characteristic indicator. For situations where the measurement changes rapidly, sampling frequency is one of the technical indicators that must be fully considered. According to Shannon's sampling law, the sampling frequency of the sensor should not be lower than the frequency of the measured change2Twice.

unscramble2: The accuracy index of the sensor varies with the frequency used. Generally speaking, the higher the sampling frequency, the lower the measurement accuracy.

And the sensor provideszuiHigh precision is often achieved throughzuiMeasurement results obtained at low sampling speeds or even under static conditions. Therefore, when selecting sensors, it is necessary to consider both accuracy and speed indicators.

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