A multi-mode collection and multi-purpose hydrological cable channel current measurement device and method
A technology for hydrological cableways and flow measuring devices, which is applied in the direction of measuring devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., and can solve problems such as inability to measure weak currents, low measurement accuracy, and high starting flow velocity
Active Publication Date: 2019-07-30
HOHAI UNIV
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Problems solved by technology
This requires a certain number of transmission cables to be arranged. In addition, when the transmission distance is relatively long, the signal attenuation is serious and the data error rate is relatively high. To ensure the validity of the data, it is necessary to add auxiliary equipment to effectively amplify the signal; the mechanical rotor flow meter , this kind of flow meter has defects such as narrow speed measurement range, high starting flow speed, inability to measure weak flow, fear of floating objects such as sediment, water plants, damage to flow field, easy damage of sensor, low measurement accuracy, and failure to meet the needs of long-term automatic monitoring. The Doppler flowmeter uses an ultrasonic transducer to detect the flow velocity with ultrasonic waves. Although the accuracy is high, the cost is high; the electromagnetic flowmeter uses the principle of electromagnetic induction to measure the conductive fluid according to the electromotive force generated when the conductive fluid passes through an external magnetic field. Flow, used for indirect measurement of flow velocity, has the problem of low measurement efficiency
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[0036] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0037] Such as figure 1 As shown, the present invention provides a multi-mode and multi-purpose hydrological cableway current measuring device, including lead fish, current meter and buoy installed on the lead fish. The device also includes a self-power generation system for the device, a water quality self-test system, and a signal self-transmission system; among them, the water quality self-test system is vertically installed on the tail of the lead fish, and the signal self-transmission system is fixedly installed on the top of the lead fish suspension mechanism. The self-generating system is fixedly installed on the current meter suspension rod at the front of the lead fish.
[0038] The self-generating system includes armature windings, iron cores, and stator windings. Among them, the armature windings are embedded on the outer surface of the...
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The invention discloses a multi-mode and multi-purpose hydrological cableway flow measuring device and method, which is composed of a self-power generation system, a water quality self-test system, a self-warning system, and a signal self-transmission system. Use Fourier transform infrared spectroscopy to detect self-collected water samples to realize real-time observation of the water quality of the measured section; cooperate with the improved current meter to install the armature winding to form the bearing of the motor rotor and install the iron core and stator winding to form the motor The shaft sleeve of the stator realizes the self-power generation function between the stator and the rotor under the action of excitation; it cooperates with the wireless electromagnetic sensor to realize the normal transmission and storage of data when the wired data transmission fails. The present invention can be widely used in the flow measurement process of the cable channel of various hydrological stations, and realizes self-generating flow measurement, self-monitoring water quality status, and self-transmission flow rate in emergency situations (such as power supply equipment water damage, sudden power failure, etc.) And water quality signal data, self-warning multi-mode, multi-angle, multi-functional purposes.
Description
technical field [0001] The invention relates to a multi-mode and multi-purpose hydrological cableway flow measuring device and method, belonging to the field of hydrological instruments. Background technique [0002] There are many methods of flow measurement involved in the process of hydrological testing, and there are mainly two methods of flow measurement: first, mechanical flow measurement, including conventional propeller (or cup) type current meter flow measurement, mechanical rotor flow meter flow measurement, etc. ; Second, automatic flow measurement, including Doppler flow meter flow measurement, electromagnetic flow meter flow measurement, acoustic point flow meter flow measurement, radio current flow meter flow measurement, optical current flow meter flow measurement, etc. [0003] Velocity and discharge measurement is an indispensable part of the basic data of hydrological model tests, and the above two types of flow measurement methods also have various shortco...
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IPC IPC(8): G01N21/3577G01P5/00
CPCG01N21/3577G01P5/00
Inventor 王卫光郑佳重丁一民邢万秋董青傅健宇
Owner HOHAI UNIV
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