Lighting box controlled by CAN (Controller Area Network)

Abstract

The utility model discloses a lighting box controlled by a CAN (Controller Area Network), which comprises a box body, a plurality of switches arranged on the surface of the box body, a control panel arranged inside the box body, a power supply module and an area control module arranged on the control panel, an input end of the power supply module is connected with a mains supply, and an output end of the area control module is connected with the mains supply. The area control module comprises a controller chip U1, a power conversion circuit for providing a 5V power supply, a signal output circuit for outputting a control signal, and a switching circuit correspondingly connected with the switch; and the output end of the signal output circuit is connected with a vehicle lamp load through a CAN bus. According to the utility model, the 220V alternating current is converted into the 12V direct current through the power supply module to supply power to the vehicle lamp load and the area control module, so that the safety of the circuit is ensured, a stable power supply is provided, and the power supply circuit has the effects of simple structure and low use cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle lamp control, and in particular relates to a lighting box controlled by CAN. Background Art

[0002] Headlights, as the car's "eyes," provide the driver with a primary line of defense, whether driving day or night, or in rain or snow. Driving vision is inextricably linked to driving safety, so functional safety analysis of headlights, a key component in ensuring the safe and normal operation of a vehicle, has become an industry consensus.

[0003] Whether conducting safety analysis or product demonstrations, vehicle lighting load status control is essential. Currently, the control systems used rely on complex computer systems and messaging equipment, which not only increases manufacturing costs but also increases the likelihood of failure. Furthermore, numerous wiring harnesses create a chaotic and disorganized environment and can compromise system reliability. Utility Model Content

[0004] The purpose of the present invention is to provide a lighting box controlled by CAN to solve the problems mentioned in the above background technology. The lighting box controlled by CAN provided by the present invention has the characteristics of simple structure, low production cost, and improved system stability and reliability.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lighting box controlled by CAN, comprising a box body, a plurality of switches installed on the surface of the box body, a control board installed inside the box body, the control board comprising a power module and a regional control module, the input end of the power module being connected to the mains, the regional control module comprising a controller chip U1, a power conversion circuit providing a 5V power supply, a signal output circuit outputting a control signal, and a switch circuit connected to the corresponding switch, the output end of the signal output circuit being connected to the vehicle light load via the CAN bus.

[0006] In order to convert 12V to 5V to power chip U1 and chip U3, the power conversion circuit further includes chip U2, pin 1 of chip U2 is connected to the negative end of the power module, pin 2 of chip U2 is connected to the positive end of the power module, and pin 4 of chip U2 is the VCC end.

[0007] In order to remove the high-frequency components in the power signal and thus stabilize the power signal, pin 2 of chip U2 is further connected to one end of capacitor C12, and pin 4 of chip U2 is further connected to one end of capacitor C13. The other ends of capacitors C12 and C13 are respectively connected to pin 3 of chip U2.

[0008] In order to trigger the ADC pin of the controller chip U1, the switching circuit further includes a resistor R1, one end of the resistor R1 is connected to pin 4 of the chip U2, the other end of the resistor R1 is respectively connected to the switch and one end of the resistor R2, the other end of the switch is connected to pin 3 of the chip U2, and the other end of the resistor R2 is connected to the ADC pin of the controller chip U1.

[0009] In order to filter and prevent jitter, one end of the resistor R2 connected to the ADC pin of the controller chip U1 is further connected to one end of the capacitor C1, and the other end of the capacitor C1 is connected to pin 3 of the chip U2.

[0010] In order to output the control signal, the signal output circuit further includes a chip U3, wherein the TXD pin of the chip U3 is connected to the RXD pin of the control chip U1, the RXD pin of the chip U3 is connected to the TXD pin of the control chip U1, the GND pin of the chip U3 is connected to the 3 pin of the chip U2, the VDD pin of the chip U3 is connected to the 4 pin of the chip U2, and the 5 and 6 pins of the chip U3 are connected to the CAN bus.

[0011] In order to ensure that the control signal is not distorted, pin 6 of chip U3 is further connected to one end of resistor R21, and pin 5 of chip U3 is also connected to one end of resistor R21. The other ends of resistors R21 and R22 are both connected to one end of capacitor C14, and the other end of capacitor C14 is connected to pin 3 of chip U2.

[0012] In order to achieve electromagnetic compatibility and prevent electromagnetic interference, pin 6 of chip U3 is further connected to one end of capacitor C15 and inductor L1, pin 5 of chip U3 is also connected to one end of capacitor C16 and inductor L2, and the other ends of capacitor C15 and capacitor C16 are both connected to pin 3 of chip U2.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This utility model converts 220V AC into 12V DC through a power module to power the headlight load and the regional control module, ensuring the safety of the circuit while providing a stable power supply. It has a simple structure and low cost.

[0015] 2. The utility model triggers the controller chip U1 through a switch circuit, and the controller chip U1 outputs the corresponding control signal to the headlight load through the signal output circuit, thereby realizing the control of the headlight status. It has a simple structure and low production cost, does not require message sending equipment and a large number of wiring harness connections, and improves the stability and reliability of the system.

[0016] 3. The utility model triggers the ADC pin of the controller chip U1 by cooperating with the on-off of the switch and the resistors R1 and 2, which has the effects of simple circuit structure and intuitive and convenient control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit diagram of the regional control module of the utility model;

[0018] Figure 2 This is a circuit diagram of the power conversion circuit of the utility model;

[0019] Figure 3 This is a circuit diagram of the switch circuit of the utility model;

[0020] Figure 4 This is a circuit diagram of the signal output circuit of the utility model; DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1-4 The utility model provides the following technical solutions: a lighting box controlled by CAN, including a box body, a plurality of switches installed on the surface of the box body, a control board installed inside the box body, the control board including a power module and a regional control module, the power module is a 220V to 12V DC power supply purchased from the market, the input end of the power module is connected to the mains, the regional control module includes a controller chip U1, a power conversion circuit providing 5V power supply, a signal output circuit outputting a control signal, and a switch circuit connected to the switch correspondingly, the output end of the signal output circuit is connected to the car light load through the CAN bus, and the model of the controller chip U1 is S32K144-100PIN.

[0024] By adopting the above technical solution, the utility model converts 220V AC power into 12V DC power through the power module to power the headlight load and the regional control module, ensuring the safety of the circuit while providing a stable power supply, with a simple structure and low cost. The utility model triggers the controller chip U1 through the switching circuit, and the controller chip U1 outputs the corresponding control signal to the headlight load through the signal output circuit, thereby realizing the control of the headlight status. It has a simple structure and low production cost, does not require message sending equipment and a large number of wiring harness connections, and improves the stability and reliability of the system.

[0025] Specifically, the power conversion circuit includes chip U2, pin 1 of chip U2 is connected to the negative end of the power module, pin 2 of chip U2 is connected to the positive end of the power module, pin 4 of chip U2 is the VCC end, and the model of chip U2 is B1205S.

[0026] By adopting the above technical solution, 12V is converted into 5V to power the chip U1 and the chip U3.

[0027] Specifically, the switching circuit includes a resistor R1, one end of the resistor R1 is connected to pin 4 of the chip U2, the other end of the resistor R1 is connected to the switch and one end of the resistor R2 respectively, the other end of the switch is connected to pin 3 of the chip U2, and the other end of the resistor R2 is connected to the ADC pin of the controller chip U1.

[0028] By adopting the above technical solution, the ADC pin of the controller chip U1 is triggered by cooperating with the on-off of the switch and the resistors R1 and 2, which has the effect of simple circuit structure and intuitive and convenient control method.

[0029] Specifically, one end of the resistor R2 connected to the ADC pin of the controller chip U1 is also connected to one end of the capacitor C1, and the other end of the capacitor C1 is connected to pin 3 of the chip U2.

[0030] The above technical solution is used for filtering and anti-shake.

[0031] Specifically, the signal output circuit includes chip U3, wherein the TXD pin of chip U3 is connected to the RXD pin of the control chip U1, the RXD pin of chip U3 is connected to the TXD pin of the control chip U1, the GND pin of chip U3 is connected to pin 3 of chip U2, the VDD pin of chip U3 is connected to pin 4 of chip U2, and pins 5 and 6 of chip U3 are connected to the CAN bus. The model of chip U3 is UJA1163.

[0032] By adopting the above technical solution, a control signal can be output.

[0033] Example 2

[0034] The difference between this embodiment and embodiment 1 is that: specifically, pin 2 of chip U2 is also connected to one end of capacitor C12, pin 4 of chip U2 is also connected to one end of capacitor C13, and the other ends of capacitor C12 and capacitor C13 are respectively connected to pin 3 of chip U2.

[0035] By adopting the above technical solution, high-frequency components in the power supply signal are removed, thereby stabilizing the power supply signal.

[0036] Example 3

[0037] The difference between this embodiment and Example 1 is that: specifically, pin 6 of chip U3 is also connected to one end of resistor R21, pin 5 of chip U3 is also connected to one end of resistor R21, the other ends of resistor R21 and resistor R22 are both connected to one end of capacitor C14, and the other end of capacitor C14 is connected to pin 3 of chip U2.

[0038] By adopting the above technical solution, it is possible to ensure that the control signal is not distorted.

[0039] Specifically, pin 6 of chip U3 is also connected to one end of capacitor C15 and inductor L1, pin 5 of chip U3 is also connected to one end of capacitor C16 and inductor L2, and the other ends of capacitor C15 and capacitor C16 are both connected to pin 3 of chip U2.

[0040] By adopting the above technical solution, electromagnetic compatibility is achieved and electromagnetic interference is prevented.

[0041] To sum up, the utility model converts 220V AC power into 12V DC power to power the headlight load and the regional control module through the power module, ensuring the safety of the circuit while providing a stable power supply, with a simple structure and low cost. The utility model triggers the controller chip U1 through the switching circuit, and the controller chip U1 outputs the corresponding control signal to the headlight load through the signal output circuit, thereby realizing the control of the headlight status, with a simple structure and low production cost. It does not require message sending equipment and a large number of wiring harness connections, thereby improving the stability and reliability of the system. The utility model triggers the ADC pin of the controller chip U1 by coordinating the on and off of the switch with the resistors R1 and 2, with a simple circuit structure and an intuitive and convenient control method.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lighting box controlled by CAN, characterized by: It includes a box body, a number of switches are installed on the surface of the box body, a control board is installed inside the box body, the control board includes a power module and a regional control module, the input end of the power module is connected to the mains, the regional control module includes a controller chip U1, a power conversion circuit that provides 5V power, a signal output circuit that outputs a control signal, and a switch circuit connected to the corresponding switch, and the output end of the signal output circuit is connected to the car light load through the CAN bus.

2. The lighting box controlled by CAN according to claim 1, characterized in that: The power conversion circuit includes a chip U2, wherein pin 1 of the chip U2 is connected to the negative terminal of the power module, pin 2 of the chip U2 is connected to the positive terminal of the power module, and pin 4 of the chip U2 is the VCC terminal.

3. The lighting box controlled by CAN according to claim 2, characterized in that: Pin 2 of the chip U2 is also connected to one end of the capacitor C12, and pin 4 of the chip U2 is also connected to one end of the capacitor C13. The other ends of the capacitors C12 and C13 are respectively connected to pin 3 of the chip U2.

4. The lighting box controlled by CAN according to claim 3, characterized in that: The switching circuit includes a resistor R1, one end of the resistor R1 is connected to pin 4 of the chip U2, the other end of the resistor R1 is connected to the switch and one end of the resistor R2 respectively, the other end of the switch is connected to pin 3 of the chip U2, and the other end of the resistor R2 is connected to the ADC pin of the controller chip U1.

5. The lighting box controlled by CAN according to claim 4, characterized in that: One end of the resistor R2 connected to the ADC pin of the controller chip U1 is also connected to one end of the capacitor C1 , and the other end of the capacitor C1 is connected to pin 3 of the chip U2 .

6. The lighting box controlled by CAN according to claim 3, characterized in that: The signal output circuit includes chip U3, wherein the TXD pin of chip U3 is connected to the RXD pin of the control chip U1, the RXD pin of chip U3 is connected to the TXD pin of the control chip U1, the GND pin of chip U3 is connected to pin 3 of chip U2, the VDD pin of chip U3 is connected to pin 4 of chip U2, and pins 5 and 6 of chip U3 are connected to the CAN bus.

7. The lighting box controlled by CAN according to claim 6, characterized in that: Pin 6 of the chip U3 is also connected to one end of the resistor R21, and pin 5 of the chip U3 is also connected to one end of the resistor R21. The other ends of the resistors R21 and R22 are both connected to one end of the capacitor C14, and the other end of the capacitor C14 is connected to pin 3 of the chip U2.

8. The lighting box controlled by CAN according to claim 6, characterized in that: Pin 6 of the chip U3 is also connected to one end of the capacitor C15 and the inductor L1, and pin 5 of the chip U3 is also connected to one end of the capacitor C16 and the inductor L2. The other ends of the capacitors C15 and C16 are both connected to pin 3 of the chip U2.

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