CN212207619U - Vehicle-mounted voltage and current detection system - Google Patents
Vehicle-mounted voltage and current detection system Download PDFInfo
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- CN212207619U CN212207619U CN202020747993.XU CN202020747993U CN212207619U CN 212207619 U CN212207619 U CN 212207619U CN 202020747993 U CN202020747993 U CN 202020747993U CN 212207619 U CN212207619 U CN 212207619U
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Abstract
The utility model discloses a vehicle-mounted voltage electric current detecting system is through the collection to multichannel voltage signal and current signal to input it to the main control unit and handle, the data after will handling passes through the display of LCD display unit, and deposits in the memory cell, also can connect hole or RS232 interface transmission to the host computer with data through the ethernet, realizes real-time monitoring vehicle-mounted current voltage systematically, prevention traffic accident.
Description
Technical Field
The utility model relates to a vehicle mounted power supply technical field, concretely relates to vehicle mounted voltage current detecting system.
Background
In a vehicle-mounted system, a multi-path power supply device is involved, the power supply system is very complex, and accidents need to be prevented by monitoring constantly, and the detection of the power supply system in the prior art lacks a system scheme and cannot carry out systematic detection on the vehicle-mounted power supply system.
SUMMERY OF THE UTILITY MODEL
The aforesaid is not enough to among the prior art, the utility model provides a pair of on-vehicle voltage current detection system has solved the problem that can't carry out systematic detection to the on-vehicle electrical power generating system.
In order to achieve the purpose of the invention, the utility model adopts the technical scheme that: an on-vehicle voltage current detection system comprising: the system comprises a power subsystem, a main control unit, a storage unit, an air conditioner current detection unit, an Ethernet interface unit, a 232 interface unit, a mains supply detection unit, a silicon power generation voltage detection unit, a battery pack voltage detection unit, a vehicle-mounted rechargeable battery detection unit, a 24V output voltage detection unit, a reference voltage unit, a battery pack current detection unit, a silicon power generation current detection unit, a 24V output current detection unit and an LCD display unit;
the power supply subsystem is respectively and electrically connected with the main control unit, the storage unit, the air conditioner current detection unit, the Ethernet interface unit, the 232 interface unit, the commercial power detection unit, the reference voltage unit, the battery pack current detection unit, the silicon power generation current detection unit, the 24V output current detection unit and the LCD display unit;
the main control unit is respectively in communication connection with the storage unit, the air conditioner current detection unit, the Ethernet interface unit, the 232 interface unit, the commercial power detection unit, the silicon power generation voltage detection unit, the battery pack voltage detection unit, the vehicle-mounted rechargeable battery detection unit, the 24V output voltage detection unit, the battery pack current detection unit, the silicon power generation current detection unit, the 24V output current detection unit and the LCD display unit.
Further, the power subsystem includes: a 5V voltage reduction unit, a 3.3V voltage reduction unit and a 1.8V voltage reduction unit;
the 5V voltage reduction unit comprises: the AC input end J2, the AC output positive end SD _ L, the AC output negative end SD _ N, the 5V output end and the-5V output end; the 3.3V voltage reduction unit includes: a 5V input J4 and a 3.3V output; the 1.8V voltage reduction unit includes: a 5V input terminal and a 1.8V output terminal; the alternating current input end J2 of the 5V voltage reduction unit inputs vehicle-mounted alternating current, and the 5V output end of the 5V voltage reduction unit is respectively connected with the 5V input end J4 of the 3.3V voltage reduction unit and the 5V input end of the 1.8V voltage reduction unit.
Furthermore, the CPU of the main control unit is an STM32F407VET6, and a power supply terminal of the main control unit is connected to the 3.3V output terminal of the 3.3V voltage reduction unit.
Further, the ethernet interface unit includes: the power supply end of 3.3V and the power supply end of 1.8V, the power supply end of 3.3V is connected with the output end of 3.3V of the voltage reduction unit of 3.3V, the power supply end of 1.8V is connected with the output end of 1.8V of the voltage reduction unit of 1.8V, and the communication interface with the CPU is SPI;
the power supply end of the 232 interface unit is connected with the 3.3V output end of the 3.3V voltage reduction unit, and the communication interface between the power supply end of the 232 interface unit and the CPU is USART 3; the power supply end of the LCD unit is connected with the 5V output end of the 5V voltage reduction unit, and the communication interface of the LCD unit and the CPU is USART 1.
Further, the mains detection unit comprises: the transformer T1, the rectifier bridge U4, the capacitor E2, the grounding resistor R10, the grounding capacitor C6, the resistor R4, the grounding resistor R11, the grounding capacitor C7, the resistor R7, the grounding capacitor C8 and the grounding capacitor C9;
one end of the primary side of the transformer T1 is connected with an alternating current output positive end SD _ L, the other end of the primary side of the transformer T1 is connected with an alternating current output negative end SD _ N, and the secondary side of the primary side of the transformer T1 is connected with the input end of a rectifier bridge U4; a first output end of the rectifier bridge U4 is respectively connected with the anode of the capacitor E2, one end of a grounding resistor R10, one end of a grounding capacitor C6 and one end of a resistor R4, and a second output end of the rectifier bridge U4 is grounded; the negative electrode of the capacitor E2 is grounded; the other end of the resistor R4 is respectively connected with the other ends of a grounding resistor R11, a grounding capacitor C7 and a resistor R7; the other end of the resistor R7 is respectively connected with a grounding capacitor C8 and a grounding capacitor C9 and is used as an SDDY end of the mains supply detection unit; and the SDDY end of the mains supply detection unit is connected with the ADC1_ IN7 end of the CPU through a resistor R69.
Further, the circuit structures of the silicon power generation voltage detection unit, the battery pack voltage detection unit, the vehicle-mounted rechargeable battery detection unit and the 24V output voltage detection unit are the same; the silicon generated voltage detection unit includes: the circuit comprises a diode D2, a grounded capacitor C17, a capacitor E6, a resistor R23, a grounded resistor R25, a grounded capacitor C16, a resistor R24 and a grounded capacitor C18;
the anode of the diode D2 is used as the GF _ ON input end of the silicon generated voltage detection unit, and the cathode of the diode D2 is respectively connected with the grounding capacitor C17, the anode of the capacitor E6 and one end of the resistor R23; the other end of the resistor R23 is respectively connected with one end of a grounding resistor R25, a grounding capacitor C16 and a resistor R24; the other end of the resistor R24 is connected with a grounding capacitor C18 and is used as a GFDY output end of the silicon generated voltage detection unit; the negative electrode of the capacitor E6 is grounded;
the GF _ ON input end of the silicon generated voltage detection unit is connected with the vehicle-mounted silicon generated voltage output end, and the GFDY output end of the silicon generated voltage detection unit is connected with the ADC1_ IN13 end of the CPU through a resistor R67; the input end of the battery pack voltage detection unit is named as a DC + input end, the output end of the battery pack voltage detection unit is named as a DCDY output end, the DC + input end of the battery pack voltage detection unit is connected with the output voltage end of the battery pack, and the DCDY output end of the battery pack voltage detection unit is connected with the ADC1_ IN11 end of the CPU through a resistor R64; the input end of the vehicle-mounted rechargeable battery detection unit is named as a CD input end, the output end of the vehicle-mounted rechargeable battery detection unit is named as a CDDY output end, the CD input end of the vehicle-mounted rechargeable battery detection unit is connected with a battery charging voltage output end, and the CDDY output end of the vehicle-mounted rechargeable battery detection unit is connected with an ADC1_ IN5 end of the CPU through a resistor R68; the input end of the 24V output voltage detection unit is named as a 24V input end, the output end of the 24V output voltage detection unit is named as a 24VDY output end, the 24V input end of the 24V output voltage detection unit is connected with a 24V voltage output end of a vehicle, and the 24VDY output end of the 24V output voltage detection unit is connected with an ADC1_ IN8 end of a CPU through a resistor R70.
The beneficial effects of the further scheme are as follows: the resistor R3 and the resistor R5 form a voltage division circuit, so that the voltage at the output end of the 24VDY is reduced to a safe voltage range in proportion, and an analog-digital conversion channel is prevented from being burnt.
Further, the reference voltage unit includes: the voltage stabilizing chip adopts TPS79301DBVRQ1, and the 5V input end of the voltage stabilizing chip is connected with the 5V output end of the 5V voltage reducing unit.
Further, the battery pack current detection unit includes: a current sensor J1, a grounding resistor R6, a grounding capacitor C2, a capacitor E1, a grounding resistor R5, a resistor R1, a grounding capacitor C3, a grounding resistor R8, a grounding capacitor C1, an amplifier U1A, a resistor R13, a resistor R15, a resistor R16, a voltage regulator tube U6, a grounding resistor R19, a resistor R2, a grounding resistor R12, a grounding resistor R17, a resistor R14, an amplifier U1B, a grounding capacitor C4, a resistor R3 and a grounding capacitor C5;
the power supply end of the current sensor J1 is connected with the 5V output end of the 5V voltage reduction unit, the common end of the current sensor J1 is grounded, and the current signal output end of the current sensor J1 is respectively connected with one end of a grounding resistor R6, a grounding capacitor C2, the anode of a capacitor E1, a grounding resistor R5 and a resistor R1; the non-inverting input end of the amplifier U1A is respectively connected with the other end of the resistor R1, the grounded capacitor C3 and the grounded resistor R8, the inverting input end of the amplifier U1A is respectively connected with one end of the resistor R15 and one end of the resistor R13, the output end of the amplifier U1 is respectively connected with one end of the resistor R2 and the other end of the resistor R13, the power supply end of the amplifier U1 is respectively connected with the grounded capacitor C1 and the 5V output end of the 5V voltage reduction unit, and the common end of the amplifier U1 is connected with the-5V output end; the negative electrode of the capacitor E1 is grounded; the non-inverting input end of the amplifier U1B is respectively connected with the other end of the resistor R2 and the grounding resistor R12, the inverting input end thereof is respectively connected with one end of the grounding resistor R17 and one end of the resistor R14, and the output end thereof is respectively connected with the other end of the resistor R14, one end of the grounding capacitor C4 and one end of the resistor R3; the other end of the resistor R3 is connected with a grounding capacitor C5 and is used as a DCDL output end of the battery pack current detection unit; the cathode of the voltage regulator tube U6 is respectively connected with one end of a resistor R16, the other end of the resistor R15, the control end of the voltage regulator tube U6 and a grounding resistor R19, and is also connected with the 2.5V output end of the reference voltage unit, and the anode of the voltage regulator tube U6 is grounded; the other end of the resistor R16 is connected with the 5V output end of the 5V voltage reduction unit; the DCDL output end of the battery pack current detection unit is connected with the ADC1_ IN10 end of the CPU through a resistor R63.
Further, the silicon power generation current detection unit and the 24V output current detection unit have the same structure;
the silicon power generation flow detection unit includes: a current sensor J3, a grounding resistor R34, a grounding resistor R27, a capacitor E7, a grounding resistor R33, a resistor R29, a grounding capacitor C28, a grounding resistor R35, an amplifier U8A, a grounding capacitor C19, a resistor R41, a resistor R37, a resistor R30, a grounding resistor R36, a grounding resistor R42, a resistor R40, an amplifier U8B, a grounding capacitor C29, a resistor R31 and a grounding capacitor 30;
the power supply end of the current sensor J3 is connected with the 5V output end of the 5V voltage reduction unit, the common end of the current sensor J3 is grounded, and the current output end of the current sensor J3 is respectively connected with one end of a grounding resistor R34, a grounding capacitor C27, the anode of a capacitor E7, a grounding capacitor R33 and a resistor R29; a positive phase input end of the amplifier U8A is respectively connected with the other end of the resistor R29, the grounded capacitor C28 and the grounded resistor R35, an opposite phase input end of the amplifier U8 is respectively connected with one end of the resistor R41 and one end of the resistor R37, a power supply end of the amplifier U is connected with the grounded capacitor C19 and a 5V output end of the 5V voltage reduction unit, a common end of the amplifier U is connected with a-5V output end of the 5V voltage reduction unit, and an output end of the amplifier U8 is respectively connected with the other end of the resistor R37 and one end of the resistor R30; the other end of the resistor R41 is connected with the 2.5V output end of the reference voltage unit; the in-phase end of the amplifier U8B is respectively connected with the other end of the resistor R30 and the grounding resistor R36, the inverting input end of the amplifier U8B is respectively connected with one end of the grounding resistor R42 and one end of the resistor R40, and the output end of the amplifier U8B is respectively connected with the other end of the resistor R40, one end of the grounding capacitor C29 and one end of the resistor R31; the other end of the resistor R31 is connected with a grounding capacitor C30 and serves as a CEDL output end;
the output end of the 24V output current detection unit is named as a 24VDL output end, and the 24VDL output end is connected with the ADC1_ IN9 end of the CPU through a resistor R72.
The beneficial effects of the further scheme are as follows: the current signal is converted into a voltage signal and is amplified in proportion.
The utility model has the advantages that: through the collection to multichannel voltage signal and current signal to input it to the main control unit and handle, the data after will handling passes through LCD display unit and shows, and deposit in the memory cell, also can pass through ethernet hole or RS232 interface transmission to the host computer with data, realize real-time systematic control vehicle current voltage, prevent the traffic accident.
Drawings
FIG. 1 is a diagram of power supply connections of a power subsystem;
FIG. 2 is a diagram of communication connections of a master control unit;
FIG. 3 is a circuit diagram of a memory cell;
fig. 4 is a circuit diagram of an air conditioner current detection unit;
FIG. 5 is a circuit diagram of an LCD display unit;
FIG. 6 is a circuit diagram of a 5V buck unit;
FIG. 7 is a circuit diagram of a 3.3V buck unit;
FIG. 8 is a circuit diagram of a 1.8V buck unit;
FIG. 9 is a circuit diagram of a master control unit;
FIG. 10 is a circuit diagram of part A of the Ethernet interface unit;
FIG. 11 is a circuit diagram of portion B of the Ethernet interface unit;
FIG. 12 is a circuit diagram of a 232 interface unit;
fig. 13 is a circuit diagram of the mains detection unit;
FIG. 14 is a circuit diagram of a silicon voltage detection unit;
fig. 15 is a circuit diagram of a battery pack voltage detection unit;
fig. 16 is a circuit diagram of the in-vehicle rechargeable battery detection unit;
FIG. 17 is a circuit diagram of a 24V output voltage detection unit;
FIG. 18 is a circuit diagram of a reference voltage unit;
fig. 19 is a circuit diagram of a battery pack current detection unit;
fig. 20 is a circuit diagram of a silicon power generation current detection unit;
fig. 21 is a circuit diagram of a 24V output current detection unit.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
An on-vehicle voltage current detection system comprising: the system comprises a power subsystem, a main control unit, a storage unit, an air conditioner current detection unit, an Ethernet interface unit, a 232 interface unit, a mains supply detection unit, a silicon power generation voltage detection unit, a battery pack voltage detection unit, a vehicle-mounted rechargeable battery detection unit, a 24V output voltage detection unit, a reference voltage unit, a battery pack current detection unit, a silicon power generation current detection unit, a 24V output current detection unit and an LCD display unit;
as shown in fig. 1, the power subsystem is electrically connected to the main control unit, the storage unit, the air conditioner current detection unit, the ethernet interface unit, the 232 interface unit, the utility power detection unit, the reference voltage unit, the battery pack current detection unit, the silicon power generation current detection unit, the 24V output current detection unit, and the LCD display unit, respectively;
as shown in fig. 2, the main control unit is respectively in communication connection with the storage unit, the air conditioner current detection unit, the ethernet interface unit, the 232 interface unit, the utility power detection unit, the silicon power generation voltage detection unit, the battery pack voltage detection unit, the vehicle-mounted rechargeable battery detection unit, the 24V output voltage detection unit, the battery pack current detection unit, the silicon power generation current detection unit, the 24V output current detection unit, and the LCD display unit.
The circuit diagram of the memory cell is shown in fig. 3. A circuit diagram of the air conditioner current detection unit is shown in fig. 4. A circuit diagram of an LCD display unit is shown in fig. 5.
The power subsystem includes: a 5V voltage reduction unit, a 3.3V voltage reduction unit and a 1.8V voltage reduction unit;
as shown in fig. 6 to 8, the 5V voltage reduction unit includes: the AC input end J2, the AC output positive end SD _ L, the AC output negative end SD _ N, the 5V output end and the-5V output end; the 3.3V voltage reduction unit includes: a 5V input J4 and a 3.3V output; the 1.8V voltage reduction unit includes: a 5V input terminal and a 1.8V output terminal; the alternating current input end J2 of the 5V voltage reduction unit inputs vehicle-mounted alternating current, and the 5V output end of the 5V voltage reduction unit is respectively connected with the 5V input end J4 of the 3.3V voltage reduction unit and the 5V input end of the 1.8V voltage reduction unit.
As shown in fig. 9, the CPU of the main control unit is an STM32F407VET6, and a power supply terminal of the main control unit is connected to the 3.3V output terminal of the 3.3V buck unit.
As shown in fig. 10 to 11, the ethernet interface unit includes: the power supply end of 3.3V and the power supply end of 1.8V, the power supply end of 3.3V is connected with the output end of 3.3V of the voltage reduction unit of 3.3V, the power supply end of 1.8V is connected with the output end of 1.8V of the voltage reduction unit of 1.8V, and the communication interface with the CPU is SPI;
as shown in fig. 12, the power supply terminal of the 232 interface unit is connected to the 3.3V output terminal of the 3.3V voltage reduction unit, and the communication interface with the CPU is USART 3; the power supply end of the LCD unit is connected with the 5V output end of the 5V voltage reduction unit, and the communication interface of the LCD unit and the CPU is USART 1.
As shown in fig. 13, the mains detection unit includes: the transformer T1, the rectifier bridge U4, the capacitor E2, the grounding resistor R10, the grounding capacitor C6, the resistor R4, the grounding resistor R11, the grounding capacitor C7, the resistor R7, the grounding capacitor C8 and the grounding capacitor C9;
one end of the primary side of the transformer T1 is connected with an alternating current output positive end SD _ L, the other end of the primary side of the transformer T1 is connected with an alternating current output negative end SD _ N, and the secondary side of the primary side of the transformer T1 is connected with the input end of a rectifier bridge U4; a first output end of the rectifier bridge U4 is respectively connected with the anode of the capacitor E2, one end of a grounding resistor R10, one end of a grounding capacitor C6 and one end of a resistor R4, and a second output end of the rectifier bridge U4 is grounded; the negative electrode of the capacitor E2 is grounded; the other end of the resistor R4 is respectively connected with the other ends of a grounding resistor R11, a grounding capacitor C7 and a resistor R7; the other end of the resistor R7 is respectively connected with a grounding capacitor C8 and a grounding capacitor C9 and is used as an SDDY end of the mains supply detection unit; and the SDDY end of the mains supply detection unit is connected with the ADC1_ IN7 end of the CPU through a resistor R69.
As shown in fig. 14 to 17, the silicon generated voltage detection unit, the battery pack voltage detection unit, the vehicle-mounted rechargeable battery detection unit and the 24V output voltage detection unit have the same circuit structure; the silicon generated voltage detection unit includes: the circuit comprises a diode D2, a grounded capacitor C17, a capacitor E6, a resistor R23, a grounded resistor R25, a grounded capacitor C16, a resistor R24 and a grounded capacitor C18;
the anode of the diode D2 is used as the GF _ ON input end of the silicon generated voltage detection unit, and the cathode of the diode D2 is respectively connected with the grounding capacitor C17, the anode of the capacitor E6 and one end of the resistor R23; the other end of the resistor R23 is respectively connected with one end of a grounding resistor R25, a grounding capacitor C16 and a resistor R24; the other end of the resistor R24 is connected with a grounding capacitor C18 and is used as a GFDY output end of the silicon generated voltage detection unit; the negative electrode of the capacitor E6 is grounded;
the GF _ ON input end of the silicon generated voltage detection unit is connected with the vehicle-mounted silicon generated voltage output end, and the GFDY output end of the silicon generated voltage detection unit is connected with the ADC1_ IN13 end of the CPU through a resistor R67; the input end of the battery pack voltage detection unit is named as a DC + input end, the output end of the battery pack voltage detection unit is named as a DCDY output end, the DC + input end of the battery pack voltage detection unit is connected with the output voltage end of the battery pack, and the DCDY output end of the battery pack voltage detection unit is connected with the ADC1_ IN11 end of the CPU through a resistor R64; the input end of the vehicle-mounted rechargeable battery detection unit is named as a CD input end, the output end of the vehicle-mounted rechargeable battery detection unit is named as a CDDY output end, the CD input end of the vehicle-mounted rechargeable battery detection unit is connected with a battery charging voltage output end, and the CDDY output end of the vehicle-mounted rechargeable battery detection unit is connected with an ADC1_ IN5 end of the CPU through a resistor R68; the input end of the 24V output voltage detection unit is named as a 24V input end, the output end of the 24V output voltage detection unit is named as a 24VDY output end, the 24V input end of the 24V output voltage detection unit is connected with a 24V voltage output end of a vehicle, and the 24VDY output end of the 24V output voltage detection unit is connected with an ADC1_ IN8 end of a CPU through a resistor R70.
The resistor R3 and the resistor R5 form a voltage division circuit, so that the voltage at the output end of the 24VDY is reduced to a safe voltage range in proportion, and an analog-digital conversion channel is prevented from being burnt.
As shown in fig. 18, the reference voltage unit includes: the voltage stabilizing chip adopts TPS79301DBVRQ1, and the 5V input end of the voltage stabilizing chip is connected with the 5V output end of the 5V voltage reducing unit.
As shown in fig. 19, the battery pack current detection unit includes: a current sensor J1, a grounding resistor R6, a grounding capacitor C2, a capacitor E1, a grounding resistor R5, a resistor R1, a grounding capacitor C3, a grounding resistor R8, a grounding capacitor C1, an amplifier U1A, a resistor R13, a resistor R15, a resistor R16, a voltage regulator tube U6, a grounding resistor R19, a resistor R2, a grounding resistor R12, a grounding resistor R17, a resistor R14, an amplifier U1B, a grounding capacitor C4, a resistor R3 and a grounding capacitor C5;
the power supply end of the current sensor J1 is connected with the 5V output end of the 5V voltage reduction unit, the common end of the current sensor J1 is grounded, and the current signal output end of the current sensor J1 is respectively connected with one end of a grounding resistor R6, a grounding capacitor C2, the anode of a capacitor E1, a grounding resistor R5 and a resistor R1; the non-inverting input end of the amplifier U1A is respectively connected with the other end of the resistor R1, the grounded capacitor C3 and the grounded resistor R8, the inverting input end of the amplifier U1A is respectively connected with one end of the resistor R15 and one end of the resistor R13, the output end of the amplifier U1 is respectively connected with one end of the resistor R2 and the other end of the resistor R13, the power supply end of the amplifier U1 is respectively connected with the grounded capacitor C1 and the 5V output end of the 5V voltage reduction unit, and the common end of the amplifier U1 is connected with the-5V output end; the negative electrode of the capacitor E1 is grounded; the non-inverting input end of the amplifier U1B is respectively connected with the other end of the resistor R2 and the grounding resistor R12, the inverting input end thereof is respectively connected with one end of the grounding resistor R17 and one end of the resistor R14, and the output end thereof is respectively connected with the other end of the resistor R14, one end of the grounding capacitor C4 and one end of the resistor R3; the other end of the resistor R3 is connected with a grounding capacitor C5 and is used as a DCDL output end of the battery pack current detection unit; the cathode of the voltage regulator tube U6 is respectively connected with one end of a resistor R16, the other end of the resistor R15, the control end of the voltage regulator tube U6 and a grounding resistor R19, and is also connected with the 2.5V output end of the reference voltage unit, and the anode of the voltage regulator tube U6 is grounded; the other end of the resistor R16 is connected with the 5V output end of the 5V voltage reduction unit; the DCDL output end of the battery pack current detection unit is connected with the ADC1_ IN10 end of the CPU through a resistor R63.
As shown in fig. 20 to 21, the silicon power generation current detection unit and the 24V output current detection unit have the same structure;
the silicon power generation flow detection unit includes: a current sensor J3, a grounding resistor R34, a grounding resistor R27, a capacitor E7, a grounding resistor R33, a resistor R29, a grounding capacitor C28, a grounding resistor R35, an amplifier U8A, a grounding capacitor C19, a resistor R41, a resistor R37, a resistor R30, a grounding resistor R36, a grounding resistor R42, a resistor R40, an amplifier U8B, a grounding capacitor C29, a resistor R31 and a grounding capacitor 30;
the power supply end of the current sensor J3 is connected with the 5V output end of the 5V voltage reduction unit, the common end of the current sensor J3 is grounded, and the current output end of the current sensor J3 is respectively connected with one end of a grounding resistor R34, a grounding capacitor C27, the anode of a capacitor E7, a grounding capacitor R33 and a resistor R29; a positive phase input end of the amplifier U8A is respectively connected with the other end of the resistor R29, the grounded capacitor C28 and the grounded resistor R35, an opposite phase input end of the amplifier U8 is respectively connected with one end of the resistor R41 and one end of the resistor R37, a power supply end of the amplifier U is connected with the grounded capacitor C19 and a 5V output end of the 5V voltage reduction unit, a common end of the amplifier U is connected with a-5V output end of the 5V voltage reduction unit, and an output end of the amplifier U8 is respectively connected with the other end of the resistor R37 and one end of the resistor R30; the other end of the resistor R41 is connected with the 2.5V output end of the reference voltage unit; the in-phase end of the amplifier U8B is respectively connected with the other end of the resistor R30 and the grounding resistor R36, the inverting input end of the amplifier U8B is respectively connected with one end of the grounding resistor R42 and one end of the resistor R40, and the output end of the amplifier U8B is respectively connected with the other end of the resistor R40, one end of the grounding capacitor C29 and one end of the resistor R31; the other end of the resistor R31 is connected with a grounding capacitor C30 and serves as a CEDL output end;
the output end of the 24V output current detection unit is named as a 24VDL output end, and the 24VDL output end is connected with the ADC1_ IN9 end of the CPU through a resistor R72.
The silicon power generation current detection unit and the 24V output current detection unit convert the current signal into a voltage signal and amplify the voltage signal in proportion.
The utility model has the advantages that: the on-vehicle multi-path voltage is detected through the silicon power generation voltage detection unit, the battery pack voltage detection unit, the on-vehicle rechargeable battery detection unit and the 24V output voltage detection unit, the multi-path current is detected through the silicon power generation current detection unit, the 24V output current detection unit and the battery pack current detection unit, the current and voltage signal is input to the main control unit to be processed, the processed data is displayed through the LCD display unit and is stored in the storage unit, the data can also be transmitted to the upper computer through the Ethernet connection hole or the RS232 interface, the real-time systematic monitoring of the on-vehicle current and voltage is realized, and traffic accidents are prevented.
Claims (9)
1. A vehicle-mounted voltage current detection system, comprising: the system comprises a power subsystem, a main control unit, a storage unit, an air conditioner current detection unit, an Ethernet interface unit, a 232 interface unit, a mains supply detection unit, a silicon power generation voltage detection unit, a battery pack voltage detection unit, a vehicle-mounted rechargeable battery detection unit, a 24V output voltage detection unit, a reference voltage unit, a battery pack current detection unit, a silicon power generation current detection unit, a 24V output current detection unit and an LCD display unit;
the power supply subsystem is respectively and electrically connected with the main control unit, the storage unit, the air conditioner current detection unit, the Ethernet interface unit, the 232 interface unit, the commercial power detection unit, the reference voltage unit, the battery pack current detection unit, the silicon power generation current detection unit, the 24V output current detection unit and the LCD display unit;
the main control unit is respectively in communication connection with the storage unit, the air conditioner current detection unit, the Ethernet interface unit, the 232 interface unit, the commercial power detection unit, the silicon power generation voltage detection unit, the battery pack voltage detection unit, the vehicle-mounted rechargeable battery detection unit, the 24V output voltage detection unit, the battery pack current detection unit, the silicon power generation current detection unit, the 24V output current detection unit and the LCD display unit.
2. The vehicle voltage current sensing system of claim 1, wherein said power subsystem comprises: a 5V voltage reduction unit, a 3.3V voltage reduction unit and a 1.8V voltage reduction unit;
the 5V voltage reduction unit comprises: the AC input end J2, the AC output positive end SD _ L, the AC output negative end SD _ N, the 5V output end and the-5V output end; the 3.3V voltage reduction unit includes: a 5V input J4 and a 3.3V output; the 1.8V voltage reduction unit includes: a 5V input terminal and a 1.8V output terminal; the alternating current input end J2 of the 5V voltage reduction unit inputs vehicle-mounted alternating current, and the 5V output end of the 5V voltage reduction unit is respectively connected with the 5V input end J4 of the 3.3V voltage reduction unit and the 5V input end of the 1.8V voltage reduction unit.
3. The vehicle-mounted voltage and current detection system according to claim 2, wherein the CPU of the main control unit is STM32F407VET6, and a power supply end of the CPU is connected with a 3.3V output end of the 3.3V voltage reduction unit.
4. The vehicle-mounted voltage and current detection system according to claim 3, wherein said Ethernet interface unit comprises: the power supply end of 3.3V and the power supply end of 1.8V, the power supply end of 3.3V is connected with the output end of 3.3V of the voltage reduction unit of 3.3V, the power supply end of 1.8V is connected with the output end of 1.8V of the voltage reduction unit of 1.8V, and the communication interface with the CPU is SPI;
the power supply end of the 232 interface unit is connected with the 3.3V output end of the 3.3V voltage reduction unit, and the communication interface between the power supply end of the 232 interface unit and the CPU is USART 3; the power supply end of the LCD unit is connected with the 5V output end of the 5V voltage reduction unit, and the communication interface of the LCD unit and the CPU is USART 1.
5. The vehicle-mounted voltage and current detection system according to claim 3, wherein the commercial power detection unit includes: the transformer T1, the rectifier bridge U4, the capacitor E2, the grounding resistor R10, the grounding capacitor C6, the resistor R4, the grounding resistor R11, the grounding capacitor C7, the resistor R7, the grounding capacitor C8 and the grounding capacitor C9;
one end of the primary side of the transformer T1 is connected with an alternating current output positive end SD _ L, the other end of the primary side of the transformer T1 is connected with an alternating current output negative end SD _ N, and the secondary side of the primary side of the transformer T1 is connected with the input end of a rectifier bridge U4; a first output end of the rectifier bridge U4 is respectively connected with the anode of the capacitor E2, one end of a grounding resistor R10, one end of a grounding capacitor C6 and one end of a resistor R4, and a second output end of the rectifier bridge U4 is grounded; the negative electrode of the capacitor E2 is grounded; the other end of the resistor R4 is respectively connected with the other ends of a grounding resistor R11, a grounding capacitor C7 and a resistor R7; the other end of the resistor R7 is respectively connected with a grounding capacitor C8 and a grounding capacitor C9 and is used as an SDDY end of the mains supply detection unit; and the SDDY end of the mains supply detection unit is connected with the ADC1_ IN7 end of the CPU through a resistor R69.
6. The on-vehicle voltage current detection system according to claim 3, wherein the silicon generated voltage detection unit, the battery pack voltage detection unit, the on-vehicle rechargeable battery detection unit, and the 24V output voltage detection unit have the same circuit configuration; the silicon generated voltage detection unit includes: the circuit comprises a diode D2, a grounded capacitor C17, a capacitor E6, a resistor R23, a grounded resistor R25, a grounded capacitor C16, a resistor R24 and a grounded capacitor C18;
the anode of the diode D2 is used as the GF _ ON input end of the silicon generated voltage detection unit, and the cathode of the diode D2 is respectively connected with the grounding capacitor C17, the anode of the capacitor E6 and one end of the resistor R23; the other end of the resistor R23 is respectively connected with one end of a grounding resistor R25, a grounding capacitor C16 and a resistor R24; the other end of the resistor R24 is connected with a grounding capacitor C18 and is used as a GFDY output end of the silicon generated voltage detection unit; the negative electrode of the capacitor E6 is grounded;
the GF _ ON input end of the silicon generated voltage detection unit is connected with the vehicle-mounted silicon generated voltage output end, and the GFDY output end of the silicon generated voltage detection unit is connected with the ADC1_ IN13 end of the CPU through a resistor R67; the input end of the battery pack voltage detection unit is named as a DC + input end, the output end of the battery pack voltage detection unit is named as a DCDY output end, the DC + input end of the battery pack voltage detection unit is connected with the output voltage end of the battery pack, and the DCDY output end of the battery pack voltage detection unit is connected with the ADC1_ IN11 end of the CPU through a resistor R64; the input end of the vehicle-mounted rechargeable battery detection unit is named as a CD input end, the output end of the vehicle-mounted rechargeable battery detection unit is named as a CDDY output end, the CD input end of the vehicle-mounted rechargeable battery detection unit is connected with a battery charging voltage output end, and the CDDY output end of the vehicle-mounted rechargeable battery detection unit is connected with an ADC1_ IN5 end of the CPU through a resistor R68; the input end of the 24V output voltage detection unit is named as a 24V input end, the output end of the 24V output voltage detection unit is named as a 24VDY output end, the 24V input end of the 24V output voltage detection unit is connected with a 24V voltage output end of a vehicle, and the 24VDY output end of the 24V output voltage detection unit is connected with an ADC1_ IN8 end of a CPU through a resistor R70.
7. The on-vehicle voltage current detection system according to claim 3, wherein said reference voltage unit includes: the voltage stabilizing chip adopts TPS79301DBVRQ1, and the 5V input end of the voltage stabilizing chip is connected with the 5V output end of the 5V voltage reducing unit.
8. The on-vehicle voltage current detection system according to claim 7, wherein the battery pack current detection unit includes: a current sensor J1, a grounding resistor R6, a grounding capacitor C2, a capacitor E1, a grounding resistor R5, a resistor R1, a grounding capacitor C3, a grounding resistor R8, a grounding capacitor C1, an amplifier U1A, a resistor R13, a resistor R15, a resistor R16, a voltage regulator tube U6, a grounding resistor R19, a resistor R2, a grounding resistor R12, a grounding resistor R17, a resistor R14, an amplifier U1B, a grounding capacitor C4, a resistor R3 and a grounding capacitor C5;
the power supply end of the current sensor J1 is connected with the 5V output end of the 5V voltage reduction unit, the common end of the current sensor J1 is grounded, and the current signal output end of the current sensor J1 is respectively connected with one end of a grounding resistor R6, a grounding capacitor C2, the anode of a capacitor E1, a grounding resistor R5 and a resistor R1; the non-inverting input end of the amplifier U1A is respectively connected with the other end of the resistor R1, the grounded capacitor C3 and the grounded resistor R8, the inverting input end of the amplifier U1A is respectively connected with one end of the resistor R15 and one end of the resistor R13, the output end of the amplifier U1 is respectively connected with one end of the resistor R2 and the other end of the resistor R13, the power supply end of the amplifier U1 is respectively connected with the grounded capacitor C1 and the 5V output end of the 5V voltage reduction unit, and the common end of the amplifier U1 is connected with the-5V output end; the negative electrode of the capacitor E1 is grounded; the non-inverting input end of the amplifier U1B is respectively connected with the other end of the resistor R2 and the grounding resistor R12, the inverting input end thereof is respectively connected with one end of the grounding resistor R17 and one end of the resistor R14, and the output end thereof is respectively connected with the other end of the resistor R14, one end of the grounding capacitor C4 and one end of the resistor R3; the other end of the resistor R3 is connected with a grounding capacitor C5 and is used as a DCDL output end of the battery pack current detection unit; the cathode of the voltage regulator tube U6 is respectively connected with one end of a resistor R16, the other end of the resistor R15, the control end of the voltage regulator tube U6 and a grounding resistor R19, and is also connected with the 2.5V output end of the reference voltage unit, and the anode of the voltage regulator tube U6 is grounded; the other end of the resistor R16 is connected with the 5V output end of the 5V voltage reduction unit; the DCDL output end of the battery pack current detection unit is connected with the ADC1_ IN10 end of the CPU through a resistor R63.
9. The vehicle-mounted voltage current detection system according to claim 7, wherein the silicon power generation current detection unit and the 24V output current detection unit are identical in structure;
the silicon power generation flow detection unit includes: a current sensor J3, a grounding resistor R34, a grounding resistor R27, a capacitor E7, a grounding resistor R33, a resistor R29, a grounding capacitor C28, a grounding resistor R35, an amplifier U8A, a grounding capacitor C19, a resistor R41, a resistor R37, a resistor R30, a grounding resistor R36, a grounding resistor R42, a resistor R40, an amplifier U8B, a grounding capacitor C29, a resistor R31 and a grounding capacitor 30;
the power supply end of the current sensor J3 is connected with the 5V output end of the 5V voltage reduction unit, the common end of the current sensor J3 is grounded, and the current output end of the current sensor J3 is respectively connected with one end of a grounding resistor R34, a grounding capacitor C27, the anode of a capacitor E7, a grounding capacitor R33 and a resistor R29; a positive phase input end of the amplifier U8A is respectively connected with the other end of the resistor R29, the grounded capacitor C28 and the grounded resistor R35, an opposite phase input end of the amplifier U8 is respectively connected with one end of the resistor R41 and one end of the resistor R37, a power supply end of the amplifier U is connected with the grounded capacitor C19 and a 5V output end of the 5V voltage reduction unit, a common end of the amplifier U is connected with a-5V output end of the 5V voltage reduction unit, and an output end of the amplifier U8 is respectively connected with the other end of the resistor R37 and one end of the resistor R30; the other end of the resistor R41 is connected with the 2.5V output end of the reference voltage unit; the in-phase end of the amplifier U8B is respectively connected with the other end of the resistor R30 and the grounding resistor R36, the inverting input end of the amplifier U8B is respectively connected with one end of the grounding resistor R42 and one end of the resistor R40, and the output end of the amplifier U8B is respectively connected with the other end of the resistor R40, one end of the grounding capacitor C29 and one end of the resistor R31; the other end of the resistor R31 is connected with a grounding capacitor C30 and serves as a CEDL output end;
the output end of the 24V output current detection unit is named as a 24VDL output end, and the 24VDL output end is connected with the ADC1_ IN9 end of the CPU through a resistor R72.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117554687A (en) * | 2024-01-10 | 2024-02-13 | 常州通宝光电股份有限公司 | Alternating current mains voltage sampling circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117554687A (en) * | 2024-01-10 | 2024-02-13 | 常州通宝光电股份有限公司 | Alternating current mains voltage sampling circuit |
| CN117554687B (en) * | 2024-01-10 | 2024-03-22 | 常州通宝光电股份有限公司 | Alternating current mains voltage sampling circuit |
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