Current sensor
A technology of current sensors and current sensitive components, applied in the field of current sensors, can solve the problems of not being able to understand the magnitude of the measured primary current signal, complicated line connections, etc.
Pending Publication Date: 2018-09-28
湖南银河电气有限公司
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Problems solved by technology
That is to say, the existing current sensor is only equipped with an indicator light that shows the power on and the working status of the sensor. In the field test, it is only possible to intuitively understand whether the current sensor is working or not, and it is impossible to understand the current measured primary current signal.
Usually, in order to obtain the current measured primary current signal, it needs to be connected through the secondary instrument, and the secondary output signal output by the current sensor can be obtained after sampling, which often requires system construction and complicated line connections
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] It should be noted here that, in Figure 2C with 2D In , a blank circle represents an indicator light that is off, and a circle with an "X"-shaped filled line represents an indicator light that is on.
[0025] Such as Figure 2A As shown, a current sensor 100 provided by an embodiment of the present invention mainly includes: a current sensitive element 110, a conditioning circuit 120, an analog output interface 130, an analog-to-digital conversion circuit...
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An embodiment of the invention discloses a current sensor, comprising: a current sensing element for sensing a primary current signal under measurement to obtain a sensing signal; a conditioning circuit for conditioning the sensing signal to obtain an analog signal; an analog output interface connected to the conditioning circuit and used for externally connecting with a secondary instrument and outputting the analog signal to the secondary instrument; an analog-digital conversion circuit connected with the conditioning circuit; an indicator light strip used for indicating magnitude of the primary current signal under measurement; and a microprocessor unit connected with the analog-digital conversion circuit and the indicator light strip and used for operating the digital signal accordingto an internal algorithm to obtain magnitude of the primary current signal under measurement, and driving the indicator light strip according to a preset program to indicate the magnitude of the primary current signal under measurement in a preset manner. The current sensor can acquire magnitude information of a primary current signal under measurement conveniently, quickly and visually.
Description
technical field [0001] The invention relates to the technical field of current measurement, in particular to a current sensor. Background technique [0002] Current sensors are widely used in current inspection and testing, industrial control, etc. The current sensor is a detection device that can sense the information of the measured primary current signal, and transform the information sensed by the detection into an electrical signal that meets certain standards or other required forms of information output, which can meet the requirements of information. Transmission, processing, storage, display, recording and control requirements. Such as figure 1 As shown, at present, the current sensor mainly samples the primary current signal measured at the front end, and outputs the secondary output signal according to the fixed turns ratio. The secondary output signal is calculated and processed to obtain the magnitude of the current measured primary current signal. [0003] ...
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IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 庞林刘扬
Owner 湖南银河电气有限公司