Temperature detection based current detection device and method
A current detection device and current detection technology, applied in the current detection device and current detection, current detection device and current detection field based on temperature detection, can solve the problems of large size and high cost, and achieve small size, low cost and light weight Effect
Pending Publication Date: 2018-04-06
QUFU NORMAL UNIV
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[0005] The main purpose of the present invention is: aiming at the deficiencies and blanks of the prior art, according to the characteristics of the temperature change after the conductor is energized, breaking through the traditional current detection method, and proposing a current detection device and method based on non-electrical quantity (temperature), thereby Solve the problems of large volume and high cost of traditional current detection devices, especially suitable for current detection in high current occasions
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[0045] Contact temperature measurement: such as figure 2 As shown, the conductor temperature detection adopts a digital temperature sensor 11, such as DS18B20, and the digital temperature sensor DS18B20 is closely attached to the surface of the circuit conductor 6 under test, and its data line DQ is connected with the DSP input port of the main control unit 3 to detect in real time to the conductor temperature; at the same time, the ambient temperature also adopts a digital temperature sensor DS18B20, and its data line DQ is also connected with another input port of the DSP of the main control unit 3, so that the ambient temperature can be detected in real time; Measure the conductor temperature rise τ of the circuit.
[0046] The current detection method of the above-mentioned current detection device based on temperature detection comprises the following steps:
[0047] Step 1. Obtain the comprehensive heat dissipation coefficient K of the measured current loop conductor und...
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The invention relates to a temperature detection based current detection device and method, and belongs to the technical field of electrical engineering. The current detection device comprises a conductor temperature detection module, an ambient temperature detection module and a master control unit; both the conductor temperature detection module and the ambient temperature detection module are connected with the master control unit; and the master control unit comprises a DSP chip, collects a conductor temperature, an ambient temperature and a condition signal, and obtains a current value bycalculation. An integrated heat radiation coefficient of a tested loop conductor under the conditions that a cooling device is started / not started is obtained via an experiment; the ambient temperature, the temperature of the tested loop conductor and the condition signal are collected; the condition signal is analyzed to determine whether there is current in a loop and whether the cooling deviceworks; and a current value is calculated according to parameters including a conductor temperature rise value of the tested loop and the like. According to the invention, the current detected deviceis low in weight, small in size, low in cost, wide in measuring range, and especially suitable for heavy current detection, and enables sets of electric appliances to be small and intelligent.
Description
technical field [0001] The invention relates to a current detection device and a current detection method, in particular to a temperature detection-based current detection device and a current detection method, belonging to the technical field of electrical engineering. Background technique [0002] At present, current detection uses current transformers, current sensors, etc., to convert the large current on the primary side into a small current signal. Their common feature is power detection. [0003] The disadvantages are: 1) Because each current transformer and current sensor has its own range, there are many product specifications. According to different ranges, users need to stock current transformers or current sensors of various specifications for backup; 2) Heavy, Large size and high cost, especially in the case of high voltage and high current, the current detection device using the above method is bulky, bulky and expensive, which makes the high voltage and high ...
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Login to View More IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 蔡彬褚晓广闫绍敏肖群孙芃
Owner QUFU NORMAL UNIV