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Current temperature sensor - — Technology introduction

current temperature sensor using technology is important, because different temperature sensor may have different characteristics in various applications. Most of the temperature sensor can work, because the current-carrying wire creates a magnetic field. When directly measure the current in the circuit, will use the current sense resistor.

induction - Induction temperature sensor using a coil, the current-carrying conductor through the coil. This leads to the power flowing in the coil, is proportional to the current. This is due to the flow of electric current of magnetic fields. Induction temperature sensor is used for alternating current. The temperature sensor has a line around the core and signal conditioner. When the current through the conductor core conductor magnetic field will enlarge it. Due to alternating current constant electric potential from negative to positive, Usually for 50 to 60 Hz) Expand and contract, so will produce magnetic field, so the current is induced in the winding. Voltage and secondary current is converted to be adjusted for the output process. 4 - signal, for example 20 ma or contact closure.

magnetic resistance - Magnetic resistance effect is some material to change its resistance value as a function of the applied in its magnetic field characteristics. If it is not applied to magnetic flux, the current will directly through the plate. If the imposed magnetic flux and magnetic flux density is proportional to the lorentz force will make current path deflection. As the current path deflection, current flows through the plate distance is longer, resulting in increased resistance.

overview of current temperature sensor

current temperature sensor in the application of the motor ( 电流传感器) Is a commonly used in motor drive temperature sensor, the output signal is used as a function of protection, feedback, no temperature sensor in the motor control, current temperature sensor is the indispensable element.

temperature sensor output signal is the voltage type and current mode, the design of the interface circuit is also different. Current output, the resistance of the concatenated certain scope, the current into a voltage. Some type of temperature sensor with bipolar power supply, the converted voltage is bipolar. Before sent to the microcontroller, the need to level ascension and amplified.

the current temperature sensor and temperature sensor with different characteristics?

temperature sensor is able to be measured by rules and convert the available output signal according to certain rules to the sum of the device or devices, he is made up of two parts, namely, respectively is sensitive components and conversion components. The sensitive element refers to the temperature sensor can feel directly or part of the response is measured; Conversion element refers to the temperature sensor will be sensitive element in feeling or response is measured into electrical signal part of the suitable for transfer or measurement.

when the temperature sensor output is the standards prescribed by the signal, is known as temperature sensor.

temperature sensors is to convert the target signal to standard electrical instrument or equipment, the temperature sensor is a physical signal into electrical signal devices, physical signals used to speak, now there are other signal.

in general current temperature sensor output signal is consistent with the measured signal waveform, is proportional to the relationship. The current temperature sensor is on the basis of the current temperature sensor through adjustment of the circuit will originally followed signal transformation became with the original edge current proportional relationship to the size of the dc signal being measured ( Voltage or current signal) Such as, DC 4 - 20mA, DC 0- 5 v直流0 - 10 v signal, etc. The signal can be standard industrial control products such as PLC, RTU, DAS card, AD collection module acquisition received directly, so normally the auxiliary power supply current temperature sensor is also commonly used DC24V dc power to industrial market.