Capacitive oil level indicator
An oil level gauge and capacitive technology, applied in the field of liquid level measurement, can solve problems such as complex circuit structure, unfavorable measurement accuracy, and complex software design, and achieve the effects of simplifying circuit structure, improving response speed, and improving measurement accuracy
Active Publication Date: 2020-12-08
深圳优威仪表技术有限公司
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Problems solved by technology
[0003]
The function control of the products in the prior art needs to be equipped with a measurement circuit and a separate MCU, and the measurement circuit is composed of discrete devices, which leads to insurmountable limitations of the product: on the one hand, the complex circuit structure makes the matching design between hardware levels difficult, and the software The design is complex, on the other hand, the performance of the device is easily affected by the external environment, and the anti-interference ability of the measurement circuit is poor, which is not conducive to improving the measurement accuracy
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[0020] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .
[0021] refer to figure 1 , figure 2 , image 3 and Figure 4 ,in figure 1 It is a structural schematic diagram of a capacitive oil level gauge in a preferred embodiment of the present invention. The capacitive oil level gauge includes a meter head 1, a process connector 2 and a capacitive sensor 3. The capacitive sensor 3 is connected to the gauge head through the process connector 2. 1 is fixed, and the meter head 1 includes a casing and a measurement and control module built in the casing;
[0022] figure 2 shows a cross-sectional view of the capacitive sensor 3 in a side-looking direction, image 3 A sectional view of the capacitive sensor ...
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The invention discloses a capacitive oil level gauge which comprises a gauge head, a process connecting piece and a capacitive sensor, the capacitive sensor is fixed with the gauge head through the process connecting piece, the gauge head comprises a shell and a measurement and control module arranged in the shell, and the measurement and control module comprises a capacitance digital conversion chip. The capacitance sensor comprises a measuring cylinder and two measuring rods arranged in the measuring cylinder, the relative positions of the measuring rods and the measuring cylinder are fixed,the measuring cylinder and the two measuring rods form two paths of measuring capacitors respectively, the two paths of measuring capacitors are connected to different measuring foot tubes of the capacitance digital conversion chip respectively, and a liquid inlet hole is formed in the bottom end of the side wall of the measuring cylinder. The top of the side wall of the measuring cylinder is provided with vent holes.
Description
technical field [0001] The invention relates to the technical field of liquid level measurement, in particular to a capacitive oil level gauge. Background technique [0002] Capacitive oil level gauges currently on the market generally include a gauge head and a capacitive sensor fixed to the gauge head. A measurement and control module is installed inside the gauge head. The measurement and control module generally includes a power supply, a measurement circuit, an MCU, and a signal output circuit. The power supply provides electric energy for the whole machine, and the measuring circuit is connected with the measuring electrode signal. The signal generation part in the measurement circuit generates the excitation signal for capacitance measurement, and converts the capacitance change into a level signal that can be recognized by the MCU through different electronic devices such as bridge measurement, sample and hold, and signal filtering in the measurement circuit. The MC...
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IPC IPC(8): G01F23/26
CPCG01F23/263
Inventor 陈鑫
Owner 深圳优威仪表技术有限公司