Control guide signal collection circuit
A signal acquisition, control and guidance technology, applied in the direction of logic circuit interface device, logic circuit using photoelectric equipment, logic circuit connection/interface layout, etc., can solve problems such as system misjudgment, complicated working conditions, and affecting normal use of users , to achieve the effect of good linearity and simple circuit
Pending Publication Date: 2016-10-26
上海富电科技有限公司
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Problems solved by technology
[0002] A circuit designed for signal transmission and communication between electric vehicles and charging pile equipment, because the signal is used for: confirmation of the connection between the electric vehicle and the charging pile, identification of the current carrying capacity of the charging connection device and the power supply power of the power supply equipment, and identification of the charging process It is very important to monitor and stop the charging system. At the same time, since most of the car charging piles are used outdoors, the working conditions are complicated, and the impact of large currents and lightning will cause electromagnetic noise interference. If the noise that is transmitted into the system is not effectively suppressed , will seriously affect the control and guidance signal acquisition circuit, causing system misjudgment, thereby causing malfunction
In addition, according to the requirements of safety regulations, the function of electric shock protection is also required, and the signal isolation is also required to avoid personal injury; if the insulation performance design of the guiding circuit is unreasonable, it will affect the normal use of users, and even damage the power supply equipment such as charging piles
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[0015] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0016] Such as figure 1 As shown, the present invention provides a control and guidance signal acquisition circuit, including a signal filter circuit, a signal isolation amplifier circuit and an analog / digital conversion circuit; the signal isolation amplifier circuit includes a voltage / current converter, a current / voltage converter, a photoelectric coupling device U3; where the input end of the voltage / current converter is connected to the signal filter circuit, the output end of the voltage / current co...
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The invention provides a control guide signal collection circuit. The circuit comprises a signal filtering circuit, a signal isolation amplifier circuit and an analog-to-digital conversion circuit. The signal isolation amplifier circuit comprises a voltage-to-current converter, a current-to-voltage converter and a photoelectric coupler U3. The input end of the voltage-to-current converter is connected with a signal filtering circuit. The output end of the voltage-to-current converter is connected with the photoelectric coupler U3. The input end of the current-to-voltage converter is connected with the photoelectric coupler U3. The output end of the current-to-voltage converter is connected with the analog-to-digital conversion circuit. Compared with the prior art, the circuit has the advantages that the circuit is more concise, the linearity is higher, the linear conversion of a level is realized, and the field electrical noise is not imported into a single chip microcomputer control system.
Description
technical field [0001] The invention relates to the field of control circuits, in particular to a control and guidance signal acquisition circuit. Background technique [0002] A circuit designed for signal transmission and communication between electric vehicles and charging pile equipment, because the signal is used for: confirmation of the connection between the electric vehicle and the charging pile, identification of the current carrying capacity of the charging connection device and the power supply power of the power supply equipment, and identification of the charging process It is very important to monitor and stop the charging system. At the same time, since most of the car charging piles are used outdoors, the working conditions are complicated, and the impact of large currents and lightning will cause electromagnetic noise interference. If the noise that is transmitted into the system is not effectively suppressed , will seriously affect the control and guidance ...
Claims
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IPC IPC(8): H03K19/0175H03K19/14
CPCH03K19/017509H03K19/14
Inventor 施建华刘景龙李正清
Owner 上海富电科技有限公司
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