Relay energy-saving system for new energy vehicle charging piles

Abstract

The present invention discloses a relay energy-saving system for a new energy vehicle charging pile, which belongs to the technical field of automobile charging piles, and includes a charging state identification module, a relay access control module, a position identification module of a vehicle to be charged, an interface steering module, a charging monitoring module, and an online storage module. The present invention can conveniently and accurately identify whether a charging output interface has a charging connection line by setting a charging state identification module, and control whether a relay that controls the output of electric energy from the charging output interface is connected to a control circuit as a basis for judgment; by setting a charging state identification module and a relay access control module, the connection state of the charging output interface can be detected and identified, and the state information of the charging output interface can be obtained, and then the corresponding relay can be controlled to be connected to the circuit, effectively avoiding the relay being in a state of being connected to the circuit all the time, reducing the waste of electric energy by the relay, and realizing the saving of electric energy.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile charging piles, and in particular to a relay energy-saving system for a new energy automobile charging pile. Background Art

[0002] With the rapid development of new energy technologies, electric vehicles are becoming more and more popular. For electric vehicles, charging piles are indispensable. The function of charging piles is similar to that of gas pumps in gas stations. They can be fixed on the ground or walls and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. They can charge various types of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Charging piles generally provide two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile to perform corresponding charging methods, charging time, and cost data printing. The charging pile display can display data such as charging amount, cost, and charging time.

[0003] Existing car charging piles mostly use relays in the control circuit to control the charging circuit to charge the electric vehicle. The relay is always in a state of being connected to the circuit, so the relay will also consume part of the electrical energy, resulting in a waste of electrical energy. However, no more suitable solution has been found to avoid the consumption of the above-mentioned part of the electrical energy. This problem needs to be solved urgently. Therefore, a relay energy-saving system for new energy vehicle charging piles is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to solve the problem that the relay is always in a state of being connected to the circuit, so that the relay will also consume part of the electric energy, resulting in a waste of electric energy. A relay energy-saving system for a new energy vehicle charging pile is provided.

[0005] The present invention solves the above technical problems through the following technical solutions, and the present invention comprises: a charging state identification module, a relay access control module, a vehicle position identification module to be charged, an interface steering module, a charging monitoring module, and an online storage module;

[0006] The charging status identification module is used to identify whether the current charging output interface has been plugged into the charging connection line;

[0007] The relay access control module is used to select whether to connect the relay that controls the on / off of the charging circuit where the current charging output interface is located to the control circuit according to whether the current charging output interface has been plugged into the charging connection line;

[0008] The vehicle position identification module to be charged is used to obtain the two-axis direction information that the current charging output interface needs to rotate;

[0009] The interface steering module is used to control the charging output interface to rotate along two axes according to the obtained two-axis position information, so that the charging output interface rotates to face the rear of the vehicle to be charged;

[0010] The charging monitoring module is used to detect the current and voltage in the charging circuit including the current charging output interface in real time;

[0011] The online storage module is used to store the charging process video data, current detection data, and voltage detection data of the current charging vehicle in the cloud.

[0012] Furthermore, the charging status recognition module includes a first image acquisition unit, a first image recognition unit, and a charging status determination unit; the first image acquisition unit is used to acquire an overhead image of the current charging output interface position, that is, an overhead image of the charging output interface, and pre-process the overhead image of the charging output interface; the first image recognition unit is used to use a first target recognition network trained with a large number of training set images to identify the charging output interface in the overhead image of the charging output interface, obtain a charging output interface target detection frame, and cut the charging output interface target detection frame from the overhead image of the charging output interface to generate a charging output interface target detection frame image; the charging status determination unit obtains the outer contour length information of the charging output interface by performing contour recognition on the charging output interface target detection frame image, and then determines whether the current charging output interface is in a state where the charging connection line has been inserted, and sends the status information to the relay access control module.

[0013] Furthermore, the position identification module of the vehicle to be charged includes a second image acquisition unit, a second image recognition unit, and a position information output unit; the second image acquisition unit is used to acquire a picture of the rear end of the vehicle to be charged, and pre-process the picture of the rear end of the vehicle to be charged; the second image recognition unit is used to use a second target recognition network trained with a large number of training set images to recognize the license plate in the picture of the rear end of the vehicle to be charged, obtain the license plate target detection frame, and obtain the center position information of the license plate target detection frame, and send the center position information of the license plate target detection frame to the position information output unit; the charging state identification unit is used to obtain the two-axis direction information that the current charging output interface needs to rotate according to the position information of the license plate target detection frame in the picture of the rear end of the vehicle to be charged, and send the two-axis direction information to the interface steering module.

[0014] Furthermore, the relay access control module includes a first motor drive unit and a first control processing unit. The first control processing unit is used to generate an action instruction for the first motor drive unit according to the status information of the current charging output interface, and send the action instruction to the first motor drive unit; the first motor drive unit is used to receive the action instruction of the first control processing unit, and control whether the relay that controls the on and off of the charging circuit where the current charging output interface is located is connected to the control circuit.

[0015] Furthermore, the charging monitoring module includes a current monitoring unit and a voltage monitoring unit; the current monitoring unit is used to perform real-time detection of the current in the charging circuit including the current charging output interface, and send the current detection data to the online storage module; the voltage monitoring unit is used to perform real-time detection of the voltage in the charging circuit including the current charging output interface, and send the voltage detection data to the online storage module.

[0016] Furthermore, the specific operation process of the charging state determination unit is as follows:

[0017] S101: Acquire a charging output interface target detection frame image generated by cropping by the first image recognition unit;

[0018] S102: Perform contour recognition on the charging output interface target detection frame image to obtain an outer contour length CL1 of the charging output interface;

[0019] S103: Compare the outer contour length CL1 of the charging output interface with the standard outer contour length CL of the charging output interface in the charging output interface template image when no charging connection line is inserted b , the standard outer contour length CL b Compared with the outer contour length CL1, when the outer contour length CL1 is greater than the standard outer contour length CL b When the charging output interface is connected to the charging cable, it is determined that the current charging output interface is in a state where the charging cable is inserted; otherwise, it is determined that the current charging output interface is in a state where the charging cable is not inserted; and the status information is sent to the relay access control module.

[0020] Furthermore, the specific operation process of the second image recognition unit is as follows:

[0021] S201: using a second target recognition network to recognize the license plate in the image of the rear of the vehicle to be charged, and obtaining a license plate target detection frame;

[0022] S202: Calculate the pixel coordinates (u1, v1) of the center point of the license plate target detection frame, i.e., the center position information of the license plate target detection frame, according to the pixel coordinates of the upper left corner intersection point and the lower right corner intersection point of the license plate target detection frame.

[0023] Furthermore, the specific operation process of the position information output unit is as follows:

[0024] S301: Calculate the pixel coordinates of the center point of the entire image of the rear of the vehicle to be charged (u o , v o ), the pixel coordinates of the center point of the license plate target detection frame (u1, v1) and the pixel coordinates of the center point of the entire image of the rear of the vehicle to be charged (u o , v o ) to obtain the difference between the pixel coordinates of the two center points (u c , v c );

[0025] S302: Based on the pixel coordinate difference of the two center points (u c , v c ) Generates the two-axis direction information that the current charging output interface needs to rotate.

[0026] Furthermore, the interface steering module includes a second motor drive unit and a second control processing unit; the second control processing unit is used to generate action instructions based on the two-axis direction information and send the action instructions to the second motor drive unit; the second motor drive unit is used to rotate according to the action instructions generated by the second control processing unit until the uc and vc coordinate values ​​are both 0.

[0027] Furthermore, the relay is a mechanical relay, and whether a port of the mechanical relay is connected to the control circuit is controlled by the first motor drive unit.

[0028] Compared with the prior art, the present invention has the following advantages: through the provided charging status identification module, it is possible to conveniently and accurately identify whether the charging output interface has been connected to the charging connection line, and to use this as a basis for judging whether the relay that controls the charging output interface to output electric energy is connected to the control circuit; through the provided charging status identification module and the relay access control module, it is possible to detect and identify the connection status of the charging output interface, obtain the status information of the charging output interface, and then control whether the corresponding relay is connected to the circuit, effectively avoiding the relay being in a state of being connected to the circuit all the time, reducing the waste of electric energy by the relay, and realizing electric energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a system block diagram of the present invention;

[0030] Figure 2 This is a bird's-eye view of the charging output interface of the present invention into which a charging connection cable has been inserted. DETAILED DESCRIPTION

[0031] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0032] like Figure 1 As shown, this embodiment provides a technical solution: a relay energy-saving system for a new energy vehicle charging pile, including: a charging state identification module, a relay access control module, a vehicle position identification module to be charged, an interface steering module, a charging monitoring module, and an online storage module;

[0033] The charging state recognition module includes a first image acquisition unit, a first image recognition unit, and a charging state judgment unit; the first image acquisition unit is used to acquire an overhead image of the current charging output interface position, that is, an overhead image of the charging output interface, and pre-process the overhead image of the charging output interface to improve the image quality, so as to facilitate subsequent recognition and state judgment; the first image recognition unit is used to use a first target recognition network trained with a large number of training set images to recognize the charging output interface in the overhead image of the charging output interface, obtain a charging output interface target detection frame, and cut the charging output interface target detection frame from the overhead image of the charging output interface to generate a charging output The interface target detection frame image is sent to the charging state determination unit for the charging state determination unit to analyze and determine the current usage status of the charging output interface; the charging state determination unit obtains the outer contour length information of the charging output interface by performing contour recognition on the charging output interface target detection frame image, and then determines whether the current charging output interface is in a state where the charging connection line has been inserted, and sends the state information to the relay access control module; through the set charging state recognition module, it is possible to conveniently and accurately identify whether the charging output interface has been connected to the charging connection line, and use it as a basis for judgment to control the relay that controls the on / off of the charging circuit where the current charging output interface is located;

[0034] The relay access control module is used to select whether to connect the relay that controls the on / off of the charging circuit where the current charging output interface is located to the control circuit according to whether the current charging output interface has been plugged into the charging connection line. The user can only choose to charge the vehicle to be charged after the relay that controls the on / off of the charging circuit where the current charging output interface is located is connected to the control circuit. When the relay that controls the on / off of the charging circuit where the current charging output interface is located is not connected to the control circuit, even if the user connects the charging pile to the vehicle to be charged through the charging connection line, the charging work cannot be performed;

[0035] The position identification module of the vehicle to be charged includes a second image acquisition unit, a second image recognition unit, and a position information output unit; the second image acquisition unit is used to acquire a picture of the rear of the vehicle to be charged, and pre-process the picture of the rear of the vehicle to be charged to improve the image quality for subsequent identification; the second image recognition unit is used to recognize the license plate in the picture of the rear of the vehicle to be charged using a second target recognition network trained with a large number of training set images, obtain a license plate target detection frame, and obtain the center position information of the license plate target detection frame, and send the center position information of the license plate target detection frame to the position information output unit; the charging state identification unit is used to obtain the two-axis direction information that the current charging output interface needs to rotate according to the position information of the license plate target detection frame in the picture of the rear of the vehicle to be charged, and send the two-axis direction information to the interface steering module;

[0036] The interface steering module is used to control the charging output interface to rotate along two axes according to the obtained two-axis position information, so that the charging output interface rotates to face the rear of the vehicle to be charged, so that the video surveillance camera set on the charging output interface can monitor the charging process, obtain the charging process video data of the current charging vehicle, and send the charging process video data to the online storage module to ensure the safety and traceability of the charging process;

[0037] The charging monitoring module includes a current monitoring unit and a voltage monitoring unit; the current monitoring unit is used to detect the current in the charging circuit including the current charging output interface in real time, and send the current detection data to the online storage module; the voltage monitoring unit is used to detect the voltage in the charging circuit including the current charging output interface in real time, and send the voltage detection data to the online storage module;

[0038] The online storage module is used to store the charging process video data, current detection data, and voltage detection data of the current charging vehicle in the cloud, which ensures the traceability of the data and also facilitates the understanding of the working status of the charging pile.

[0039] The charging pile is provided with multiple charging output interfaces, and the charging circuit where each charging output interface is located is provided with a relay for controlling the on and off of the charging circuit.

[0040] The first image acquisition unit and the second image acquisition unit preprocess the image in the following manner: firstly perform Gaussian low-pass filtering noise reduction processing on the image, and then perform histogram equalization processing on the image to improve the quality of the image.

[0041] The high-definition camera of the first image acquisition unit is fixedly installed above each charging output interface, and can obtain an overhead picture of the position of each charging output interface.

[0042] The specific operation process of the charging state determination unit is as follows:

[0043] S101: Acquire a charging output interface target detection frame image generated by cropping by the first image recognition unit;

[0044] S102: Perform contour recognition on the charging output interface target detection frame image to obtain an outer contour length CL1 of the charging output interface;

[0045] S103: Compare the outer contour length CL1 of the charging output interface with the standard outer contour length CL of the charging output interface in the charging output interface template image when no charging connection line is inserted b , the standard outer contour length CL b Compared with the outer contour length CL1, when the outer contour length CL1 is greater than the standard outer contour length CL b When the charging output interface is connected to the charging cable, it is determined that the current charging output interface is in a state where the charging cable is inserted; otherwise, it is determined that the current charging output interface is in a state where the charging cable is not inserted; and the status information is sent to the relay access control module as an action basis of the relay access control module.

[0046] The relay access control module includes a first motor drive unit and a first control processing unit. The first control processing unit is used to generate an action instruction for the first motor drive unit according to the status information of the current charging output interface, and send the action instruction to the first motor drive unit; the first motor drive unit is used to receive the action instruction of the first control processing unit, and control whether the relay that controls the on and off of the charging circuit where the current charging output interface is located is connected to the control circuit. By setting up the charging status identification module and the relay access control module, it is possible to detect and identify the connection status of the charging output interface, obtain the status information of the charging output interface, and then control whether the corresponding relay is connected to the circuit, effectively avoiding the relay being in the state of being connected to the circuit all the time, reducing the waste of electric energy by the relay, and realizing energy saving;

[0047] The specific operation process of the second image recognition unit is as follows:

[0048] S201: using a second target recognition network to recognize the license plate in the image of the rear of the vehicle to be charged, and obtaining a license plate target detection frame;

[0049] S202: Calculate the pixel coordinates (u1, v1) of the center point of the license plate target detection frame, i.e., the center position information of the license plate target detection frame, according to the pixel coordinates of the upper left corner intersection point and the lower right corner intersection point of the license plate target detection frame.

[0050] The specific operation process of the position information output unit is as follows:

[0051] S301: Calculate the pixel coordinates of the center point of the entire image of the rear of the vehicle to be charged (u o , v o ), the pixel coordinates of the center point of the license plate target detection frame (u1, v1) and the pixel coordinates of the center point of the entire image of the rear of the vehicle to be charged (u o , v o ) to obtain the difference between the pixel coordinates of the two center points (u c , v c );

[0052] S302: Based on the pixel coordinate difference of the two center points (u c , v c ) Generates the two-axis direction information that the current charging output interface needs to rotate.

[0053] The u-axis of the pixel coordinate system is arranged horizontally along the plane where the image of the rear part of the vehicle to be charged is located, and the v-axis is arranged vertically along the plane where the image of the rear part of the vehicle to be charged is located.

[0054] In step S302, according to u c 、v c The positive and negative coordinate values ​​generate the two-axis direction information that the current charging output interface needs to rotate.

[0055] The interface steering module includes a second motor drive unit and a second control processing unit; the second control processing unit is used to generate an action instruction according to the two-axis direction information and send the action instruction to the second motor drive unit; the second motor drive unit is used to rotate according to the action instruction generated by the second control processing unit until u c 、v c The coordinate values ​​are all 0.

[0056] like Figure 2 As shown, the video surveillance camera 3 is arranged on one side of the charging output interface 1, one end of the charging connection line 2 is inserted into the charging output interface 1, and a groove is arranged at the front end of the charging output interface 1 to make the charging status judgment result more accurate.

[0057] Working principle: During use, the user first inserts one end of the charging cable into the charging output interface, and then obtains the current state of the charging output interface being inserted with the charging cable through the charging status recognition module. Here, the relay that controls the on and off of the charging circuit where the current charging output interface is located is connected to the control circuit. Then the user inserts the other end of the charging cable into the charging input interface of the vehicle to be charged, and then operates on the control screen of the car charging pile to confirm the charging of the current vehicle to be charged; after charging starts, the position of the video surveillance camera is adjusted through the interface steering module so that the video surveillance camera is facing the charging vehicle to monitor the charging process.

[0058] To sum up, the relay energy-saving system for the new energy vehicle charging pile in the above-mentioned embodiment can conveniently and accurately identify whether the charging output interface has been connected to the charging connection line through the charging status identification module set up, and control whether the relay that controls the output of electric energy from the charging output interface is connected to the control circuit as a basis for judgment; through the charging status identification module and the relay access control module set up, the connection status of the charging output interface can be detected and identified, and the status information of the charging output interface can be obtained, and then whether the corresponding relay is connected to the circuit can be controlled, effectively avoiding the relay being in a state of being connected to the circuit all the time, reducing the waste of electric energy by the relay, and realizing electric energy saving.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A relay energy-saving system for a new energy vehicle charging pile, characterized in that: include: Charging status identification module, relay access control module, vehicle position identification module to be charged, interface steering module, charging monitoring module, online storage module; The charging status identification module is used to identify whether the current charging output interface has been plugged into the charging connection line; The relay access control module is used to select whether to connect the relay that controls the on / off of the charging circuit where the current charging output interface is located to the control circuit according to whether the current charging output interface has been plugged into the charging connection line; The vehicle position identification module to be charged is used to obtain the two-axis direction information that the current charging output interface needs to rotate; The interface steering module is used to control the charging output interface to rotate along two axes according to the obtained two-axis position information, so that the charging output interface rotates to face the rear of the vehicle to be charged; The charging monitoring module is used to detect the current and voltage in the charging circuit including the current charging output interface in real time; The online storage module is used to store the charging process video data, current detection data, and voltage detection data of the current charging vehicle in the cloud; The charging state recognition module includes a first image acquisition unit, a first image recognition unit, and a charging state discrimination unit; the first image acquisition unit is used to acquire an overhead image of the current charging output interface position, that is, the overhead image of the charging output interface, and pre-process the overhead image of the charging output interface; the first image recognition unit is used to recognize the charging output interface in the overhead image of the charging output interface by using a first target recognition network trained with a large number of training set images, acquire a charging output interface target detection frame, and cut the charging output interface target detection frame from the overhead image of the charging output interface to generate a charging output interface target detection frame image; The charging state determination unit obtains the outer contour length information of the charging output interface by performing contour recognition on the target detection frame image of the charging output interface, and then determines whether the current charging output interface is in a state where the charging connection line has been inserted, and sends the state information to the relay access control module; The position recognition module of the vehicle to be charged includes a second image acquisition unit, a second image recognition unit, and a position information output unit; the second image acquisition unit is used to acquire a picture of the rear of the vehicle to be charged, and pre-process the picture of the rear of the vehicle to be charged; the second image recognition unit is used to recognize the license plate in the picture of the rear of the vehicle to be charged using a second target recognition network that has been trained with a large number of training set images, obtain a license plate target detection frame, and obtain the center position information of the license plate target detection frame, and send the center position information of the license plate target detection frame to the position information output unit; the position information output unit is used to obtain the two-axis direction information that the current charging output interface needs to rotate according to the position information of the license plate target detection frame in the picture of the rear of the vehicle to be charged, and send the two-axis direction information to the interface steering module; The relay access control module includes a first motor drive unit and a first control processing unit, wherein the first control processing unit is used to generate an action instruction of the first motor drive unit according to the state information of the current charging output interface, and send the action instruction to the first motor drive unit; the first motor drive unit is used to receive the action instruction of the first control processing unit, and control whether the relay that controls the on / off of the charging circuit where the current charging output interface is located is connected to the control circuit; The charging monitoring module includes a current monitoring unit and a voltage monitoring unit; the current monitoring unit is used to detect the current in the charging circuit including the current charging output interface in real time, and send the current detection data to the online storage module; the voltage monitoring unit is used to detect the voltage in the charging circuit including the current charging output interface in real time, and send the voltage detection data to the online storage module; The specific operation process of the charging state determination unit is as follows: S101: Acquire a charging output interface target detection frame image generated by cropping by the first image recognition unit; S102: Perform contour recognition on the charging output interface target detection frame image to obtain an outer contour length CL1 of the charging output interface; S103: Compare the outer contour length CL1 of the charging output interface with the standard outer contour length CL of the charging output interface in the charging output interface template image when no charging connection line is inserted b , the standard outer contour length CL b Compared with the outer contour length CL1, when the outer contour length CL1 is greater than the standard outer contour length CL b When the charging output interface is in a state where the charging cable is inserted; Otherwise, it is determined that the current charging output interface is in a state where no charging connection line is inserted; and the state information is sent to the relay access control module; The specific operation process of the second image recognition unit is as follows: S201: using a second target recognition network to recognize the license plate in the image of the rear of the vehicle to be charged, and obtaining a license plate target detection frame; S202: Calculate the pixel coordinates (u1, v1) of the center point of the license plate target detection frame, i.e., the center position information of the license plate target detection frame, according to the pixel coordinates of the upper left corner intersection point and the lower right corner intersection point of the license plate target detection frame; The specific operation process of the position information output unit is as follows: S301: Calculate the pixel coordinates of the center point of the entire image of the rear of the vehicle to be charged (u o , v o ), the pixel coordinates of the center point of the license plate target detection frame (u1, v1) and the pixel coordinates of the center point of the entire image of the rear of the vehicle to be charged (u o , v o ) to obtain the difference between the pixel coordinates of the two center points (u c , v c ); S302: Based on the pixel coordinate difference of the two center points (u c , v c ) Generate the two-axis direction information that the current charging output interface needs to rotate; The interface steering module includes a second motor drive unit and a second control processing unit; the second control processing unit is used to generate an action instruction according to the two-axis direction information and send the action instruction to the second motor drive unit; the second motor drive unit is used to rotate according to the action instruction generated by the second control processing unit until u c 、v c The coordinate values ​​are all 0; The relay is a mechanical relay, and whether a port of the mechanical relay is connected to a control circuit is controlled by the first motor drive unit.

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