A high-sensitivity hydraulic oil detection device and its manufacturing method

A high-sensitivity, detection device technology, applied in the direction of material capacitance, etc., can solve the problems of limitation, limited detection sensitivity of inductance method, limited detection flux of microfluidic chip, etc., and achieve the effect of improving throughput

Active Publication Date: 2021-03-19
DALIAN MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Li Du's team made inductive microsensors, using methods such as LC resonance and increasing the number of channels to improve sensor accuracy and flow rate. However, due to the limitation of detection microchannels and sensor coil types, the detection accuracy reaches 50-75 micron iron particles and 50-150 micron Discrimination detection experiment
It cannot detect water droplets and air bubbles in the oil, and the accuracy needs to be improved
[0009] Current inductance methods have limited sensitivity
In addition, the existing detection accuracy requires the use of extremely small flow channels to achieve the detection effect, resulting in limited detection throughput of microfluidic chips

Method used

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  • A high-sensitivity hydraulic oil detection device and its manufacturing method
  • A high-sensitivity hydraulic oil detection device and its manufacturing method
  • A high-sensitivity hydraulic oil detection device and its manufacturing method

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Embodiment 1

[0063] Such as Figure 7 As shown, the present invention provides a schematic diagram of a high-sensitivity hydraulic oil detection device in the inductance measurement mode. The four coils inside the device are connected in series. During the detection process, the four series coils are excited by high-frequency alternating current (1-2V, 0.1-2MHz) through the measurement unit, so that the solenoid coil 8 with the silicon steel sheet 5 inside produces a Exciting the magnetic field improves the detection sensitivity of the single-layer planar coil 4 . By detecting the voltage value (Vout) of the two single-layer planar coils 4 in the middle, the differential detection of ferromagnetic metal particles and non-ferromagnetic metal particle pollutants in the oil is realized.

Embodiment 2

[0065] Such as Figure 8 As shown, the present invention provides a schematic diagram of a high-sensitivity hydraulic oil detection device in capacitance measurement mode. The solenoid coils 8 on both sides of the device are respectively connected in series with the adjacent single-layer planar coils 4, and the two sets of coils are respectively excited by high-frequency alternating current (1-2V, 0.1-2MHz) through the measurement unit, and the edge effect of the capacitor plate is used It can measure the capacitance signal of the single-layer planar coil 4 in the middle. When the water droplets or air bubbles in the oil pass through the sensing module, due to the different dielectric constants, positive or negative capacitance signal pulses are generated. Through the change of the capacitance signal (Cp ) to realize the differential detection of water droplets and air bubbles in the oil.

[0066] Such as Figure 9 As shown, the present invention also provides a high-sensiti...

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Abstract

The invention provides a high-sensitivity hydraulic oil liquid detection device and a manufacturing method thereof. The high-sensitivity hydraulic oil liquid detection device is used for distinguishing and detecting grain pollutants including ferromagnetic metal grains, non-ferromagnetic metal grains, water drops, bubbles and the like in oil liquid. According to the manufacturing method of the device, two plane coils and two solenoid coils are combined and embedded into a microfluidic chip for the first time based on a microfluidic chip technology; the two plane coils are laminated and the solenoid coils are symmetrically arranged at two sides respectively; two silicon steel sheets are added into the two solenoid coils respectively, so that the detection sensitivity of the device is remarkably improved. According to the chip, one sensor unit is used for carrying out voltage detection, so that various grain pollutants in lubricating oil and hydraulic oil are distinguished and detected;a feasible method is provided for online monitoring of the oil liquid through machine equipment and fault diagnosis can be carried out on the machine equipment.

Description

technical field [0001] The invention relates to the technical field of fault detection of hydraulic systems of marine equipment, in particular to a high-sensitivity hydraulic oil detection device and a manufacturing method thereof. Background technique [0002] Marine hydraulic systems are widely used in the industrial field. Among them, hydraulic oil is regarded as the "blood" of the hydraulic system. In addition to being an important working medium to transmit power, it also has the functions of cooling the hydraulic system, preventing corrosion of hydraulic components, reducing wear between friction pairs, and damping the system. [0003] However, the most important cause of failure of important hydraulic systems is particle contamination during system use. The main sources of particulate pollution are system residual impurities, running wear, and external impurities. At present, the methods for detecting oil particle pollutants mainly include optical detection, acousti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/24
CPCG01N27/24
Inventor 张洪朋曾霖王文琪顾长智虞子雷
Owner DALIAN MARITIME UNIVERSITY
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