A fuel oil conductivity measuring circuit and measuring instrument
A technology for measuring circuits and electrical conductivity, applied in the direction of fluid resistance measurement, etc., can solve the problems of the influence of oil conductivity, the reduction of dielectric strength, and the influence of measurement accuracy, so as to meet the needs of oil conductivity measurement, reduce the influence of temperature, and realize the clever effect
Active Publication Date: 2020-12-18
DALIAN BAHNEN PETROLEUM INSTR
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Problems solved by technology
[0003] However, the electrical conductivity of oil is easily affected by environmental factors, including humidity, salinity, temperature, etc. On the one hand, in the environment of high humidity and salt spray, the insulation strength of traditional key switches will be greatly reduced, thus affecting the measurement Accuracy; on the other hand, when the temperature is different, the value measured by the general oil conductivity tester is quite different, and the measured data signal will decay after a certain period of time, seriously affecting the measurement accuracy
Therefore, the existing oil conductivity meter can no longer meet people's needs
Method used
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[0024] 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. .
[0025] A fuel conductivity meter, such as figure 1 As shown, the measurement circuit, power supply circuit, main control unit, and buttons included are included; the power supply circuit is respectively connected to the measurement circuit and the main control unit; the sampling point and the buttons are respectively connected to the main control unit; A logic switch, the output pin of the logic switch is connected to the control signal terminal of the relay.
[0026] Such as figure 2 As shown, a fuel oil conductivity measurement circuit includes a switch circuit, an operational amplifier chip, and a sampling circuit. The switch circuit is connected...
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The invention provides a fuel oil conductivity measuring circuit comprising a switch circuit, an operational amplifying chip, and a sampling circuit. The switch circuit is connected to the positive input end of the operational amplifying chip; the output end and the negative input end of the operational amplifying chip are connected to each other to form a non-reverse closed-loop amplifier; the sampling circuit is internally provided with a sampling device connected to a sampling point, wherein one end of the sampling circuit is grounded, and the other end of the sampling circuit is connectedto a connection circuit between the output end and the negative input end of the operational amplifying chip; the sampling point is connected to a main control unit; the switch circuit, the operational amplifying chip, and the sampling circuit are respectively connected to a power supply circuit; the switch circuit comprises a control switch and a relay; the relay is used for controlling the on-off of the control switch; a logic switch used for judging key triggering is arranged in the main control unit; and the control signal end of the relay is connected to the output pin of the logic switchof the main control unit. The invention further relates to a fuel oil conductivity measuring instrument. According to the fuel oil conductivity measuring circuit and the measuring instrument thereof,the invention is reasonable in design, ingenious in conception, and capable of meeting the oil product conductivity measuring requirement.
Description
technical field [0001] The invention relates to fuel oil conductivity measurement, in particular to a fuel oil conductivity measurement circuit and a measuring instrument. Background technique [0002] The oil conductivity measuring instrument can be used to measure the conductivity of liquid light petroleum products, such as gasoline, aviation kerosene, diesel oil and other oil products. Light petroleum fuel for vehicles or aviation is a non-conductive substance, and it is easy to generate static charge during production, storage, filling and use. When a certain amount of static charge accumulates, the static sparks generated can ignite light petroleum fuel lead to major disasters. In order to prevent electrostatic disasters of light petroleum fuels, a small amount of antistatic agent is generally added to light petroleum fuels to increase the conductivity of the fuel. When too little antistatic agent is added, the electrical conductivity of the fuel is low and it is easy...
Claims
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IPC IPC(8): G01R27/22
CPCG01R27/22
Inventor 张庆强
Owner DALIAN BAHNEN PETROLEUM INSTR