CN210804048U - Power distribution parameter reader-writer - Google Patents
Power distribution parameter reader-writer Download PDFInfo
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- CN210804048U CN210804048U CN201921990388.9U CN201921990388U CN210804048U CN 210804048 U CN210804048 U CN 210804048U CN 201921990388 U CN201921990388 U CN 201921990388U CN 210804048 U CN210804048 U CN 210804048U
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Abstract
The utility model discloses a distribution parameter read write line belongs to electromechanical control technical field, including control circuit board, operating equipment, storage device and power, the power is connected with control circuit board and is its power supply, control circuit board passes through the data line and is connected with operating equipment, and is connected with storage device through the I2C bus, control circuit board's control end is connected with power module through the LIN bus, control circuit board's control end still is connected with distribution module's one end through the CAN bus, distribution module's the other end is connected with power module through the LIN bus. The 32-bit single chip microcomputer technology and the bus technology are adopted to realize the control of the load power distribution on-off of the electrical system, the identification of electrical faults and the modification of protection parameters, and realize the online debugging of the power module and the power distribution module.
Description
Technical Field
The utility model relates to an electromechanical control technical field, in particular to distribution parameter read write line.
Background
Along with the requirement of the informatization degree of the vehicle integrated management system is higher and higher, the intelligent power distribution products are more and more commonly applied, and the intelligent power module and the intelligent power distribution control module which adopt modularized, serialized and standardized designs are more and more widely applied. The distribution parameter reader-writer mainly carries out online test and programming on the intelligent power module and each function of the intelligent distribution module, realizes the operation management, parameter configuration and online test of the LIN/CAN intelligent power module and the distribution box, has the functions of state query, switch control, state monitoring, parameter modification and the like, and is connected with the intelligent distribution module or the distribution box through the LIN bus and the CAN bus.
The vehicle-mounted distribution box cannot directly monitor the state and parameters of an electric appliance system due to the installation position, product design and other reasons, if the functions of state query, on-off control, state monitoring, parameter modification and the like of each distribution output are required, after-sales personnel of a manufacturer need to be contacted to carry out corresponding operation on site, some complex operations may also involve unpacking operation, and the on-site operation has the advantages of fixed maintenance place, poor maneuvering flexibility and long time consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the not enough of prior art to realize online debugging.
In order to achieve the purpose, the power distribution parameter reader-writer comprises a control circuit board, operating equipment, storage equipment and a power supply, wherein the power supply is connected with the control circuit board to supply power to the control circuit board, the control circuit board is connected with the operating equipment through a data line and is connected with the storage equipment through an I2C bus, a control end of the control circuit board is connected with a power module through an LIN bus, the control end of the control circuit board is also connected with one end of a power distribution module through a CAN bus, and the other end of the power distribution module is connected with the power module through the LIN bus.
Furthermore, the operating device comprises a key and/or a touch pen and a display screen for displaying a control interface, and the key and/or the touch pen is connected with a control piece in the display screen.
Further, the device also comprises a first status indicator lamp for indicating the working mode of the LIN channel, a second status indicator lamp for indicating the working mode of the CAN channel and a third status indicator lamp for displaying the working status of the power supply.
Furthermore, the control circuit board comprises a microprocessor, a power supply circuit, a reset circuit, a LIN communication circuit, a CAN communication circuit, a display screen driving circuit and a key detection circuit;
the output end of the power supply circuit is connected with the microprocessor and the LIN communication circuit respectively, the output end of the key detection circuit and the output end of the reset circuit are connected with the microprocessor respectively, the LIN communication circuit and the CAN communication circuit are connected with the microprocessor to carry out two-way communication, and the input end of the display screen driving circuit is connected with the microprocessor.
Further, the power supply circuit comprises a first power supply circuit and a second power supply circuit, wherein the first power supply circuit comprises a first power supply module, a first voltage stabilizing chip, a second voltage stabilizing chip, a diode D1 and a light emitting diode;
the voltage input end of the first power supply module is connected with the negative electrode of the diode D1, the positive electrode of the diode D1 is connected with 24V voltage, the voltage output end of the first power supply module is respectively connected with the input end of the first voltage stabilizing chip and the input end of the second voltage stabilizing chip, the output end of the first voltage stabilizing chip is connected with the positive electrode of the light emitting diode through a resistor, the negative electrode of the light emitting diode is grounded, and the output end of the second voltage stabilizing chip is connected with the microprocessor;
the second power supply circuit comprises a second power supply module and a diode D2, wherein the voltage input end of the second power supply module is connected with the cathode of the diode D2, the anode of the diode D2 is connected with 24V voltage, and the voltage output end of the second power supply module is connected with the LIN communication circuit.
Further, the LIN communication circuit includes a communication chip, a diode D5, a resistor R15, a resistor R32, a capacitor C45, and a capacitor C55; an NW interface of the communication chip is connected with one end of a resistor R15, a grounding pin of the communication chip is connected with one end of a capacitor C55, the other end of a resistor R15 is connected with the other end of a capacitor C55 and then is connected with the working voltage of the communication chip, an LIN pin of the communication chip is connected with one end of a capacitor C45, one end of a capacitor C45 is connected with one end of a capacitor C55, an INH pin of the communication chip is connected with the anode of a diode D5, and the cathode of the diode D5 is connected with one end of a capacitor C45 through a resistor R32.
Further, the CAN communication circuit comprises a CAN isolation transceiver, a resistor R25, a resistor R26, a resistor R27, a capacitor C8, a capacitor C9 and a capacitor C56, a CANL signal connection pin of the CAN isolation transceiver is connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of the capacitor C8 and one end of a resistor R25 respectively, the other end of the capacitor C8 is grounded, the other end of the resistor R25 is connected with one end of the capacitor C9 and one end of the resistor R27 respectively, the other end of the capacitor C9 is grounded, and the other end of the resistor R27 is connected with a CANH signal connection pin of the CAN isolation transceiver;
the voltage input pin Vin of the CAN isolation transceiver is connected with one end of a capacitor C56, and the other end of the capacitor C56 is grounded and connected with the power ground pin of the CAN isolation transceiver.
Further, the key detection circuit comprises a resistor R8, a resistor R18, a capacitor C10, a resistor R9, a resistor R19, a capacitor C44, a resistor R10, a resistor R20, a capacitor C43, a resistor R11, a resistor R21, a capacitor C41, a resistor R12, a resistor R22 and a capacitor C42;
one end of a resistor R8 is connected with one end of a capacitor C10 through a resistor R18, one end of a resistor R9 is connected with one end of a capacitor C44 through a resistor R19, one end of a resistor R10 is connected with one end of the capacitor C43 through a resistor R20, one end of a resistor R11 is connected with one end of a capacitor C41 through a resistor R21, and one end of the resistor R12 is connected with one end of a capacitor C42 through a resistor R22;
the other end of the resistor R8, the other end of the resistor R9, the other end of the resistor R10, the other end of the resistor R11 and the other end of the resistor R12 are connected and then connected with a 3V working voltage, and the other end of the capacitor C10, the other end of the capacitor C44, the other end of the capacitor C43, the other end of the capacitor C41 and the other end of the capacitor C42 are connected and then grounded.
Furthermore, the display screen driving circuit comprises a soft board and a touch screen conversion interface chip, and the soft board is connected with the microprocessor through the touch screen conversion interface chip.
Further, the reset circuit comprises a voltage monitor, a relay K1, a capacitor C57, a capacitor C63, a capacitor C64, a resistor R7 and a resistor R23;
of voltage monitors
The relay K1 is connected between the pin and the PFI pin, a capacitor C64 and a capacitor C63 are sequentially connected in parallel at two ends of the relay K1, the RET pin of the voltage monitor is connected with one end of a resistor R23, the other end of the resistor R23 is connected with the base of a triode, the collector of the triode is connected with one end of a resistor R7 and then connected with the input end of the microprocessor, the other end of the resistor R7 is connected with 3V working voltage, the emitter of the triode is connected with one end of the capacitor C57 and then grounded, and the other end of the capacitor C57 is connected with 3V working voltage.
Compared with the prior art, the utility model discloses there are following technological effect: the 32-bit single chip microcomputer technology and the bus technology are adopted to realize the control of the on-off of the load power distribution of the electrical system, the identification of the electrical fault and the modification of the protection parameter, realize the on-line programming and debugging of the existing power module and the power distribution module, and utilize the LIN bus, the CAN bus and the serial port bus to carry out the batch uploading and downloading tasks of the parameters.
Drawings
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a power distribution parameter reader;
FIG. 2 is a schematic diagram of a panel of a power distribution parameter reader;
FIG. 3 is a schematic diagram of the circuit structure of the control circuit board;
FIG. 4 is a schematic diagram of a power supply circuit;
fig. 5 is a schematic diagram of a LIN communication circuit structure;
fig. 6 is a schematic diagram of a LIN bus control connection;
FIG. 7 is a schematic diagram of a CAN communication circuit;
FIG. 8 is a schematic view of CAN bus control wiring;
FIG. 9 is a schematic diagram of a key detection circuit;
FIG. 10 is a schematic diagram of a display panel driving circuit;
fig. 11 is a schematic diagram of a reset circuit configuration.
Detailed Description
To further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings. The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure.
As shown in fig. 1-2, the present embodiment discloses a power distribution parameter reader/writer, which includes a control circuit board 10, an operating device 20, a storage device 30, and a power source 40, where the power source 40 is connected to the control circuit board 10 to supply power to the control circuit board, the control circuit board 10 is connected to the operating device 20 through a data line and to the storage device 30 through an I2C bus, a control end of the control circuit board 10 is connected to a power module 50 through an LIN bus, the control end of the control circuit board 10 is further connected to one end of a power distribution module 60 through a CAN bus, and the other end of the power distribution module 60 is connected to the power module 50 through the LIN bus.
The operating device 20 comprises a key 21 and/or a touch pen and a display screen 22 for displaying a control interface, the key 21 and/or the touch pen is connected with a control element in the display screen 22, the power supply 40 is a direct current power supply 40, the direct current power supply 40 is connected to the control circuit board 10 through a power supply adapter, a switch of the power supply 40 is turned on, the display screen 22 displays an interface, the interface is switched through the touch pen or the operating key 21 (an upward moving key 211, a downward moving key 212, a leftward moving key 213, a rightward moving key 214 and a determining key 215) and the power module 50 and the power distribution module 60 are operated according to the prompt of the interface, the storage device adopts an EEPROM, and the storage device is used for storing configuration parameters of the power module.
Further, a first status indicator lamp 23 for displaying the power supply operation status, a second status indicator lamp 24 for indicating the LIN channel operation mode, and a third status indicator lamp 25 for indicating the CAN channel operation mode are included.
The first status indicator lamp 23 is connected with the internal working power supply of the control panel through a flat cable, the second status indicator lamp 24 is connected with the IO interface of the control panel microprocessor through a flat cable, and the third status indicator lamp 25 is connected with the IO interface of the control panel microprocessor through a flat cable.
As shown in fig. 2, a specific structure of the power distribution parameter reader/writer in this embodiment may be: the device comprises a shell, a control circuit board 10 is arranged in the shell, a liquid crystal display 22, an operation key 21 and a status indicator lamp are installed on a panel of the shell, the operation key is connected with a control in the liquid crystal display 22, the key comprises an upward moving key 211, a downward moving key 212, a leftward moving key 213, a rightward moving key 214 and a determining key 215, and the status indicator lamp comprises a first status indicator lamp 23 representing a LIN channel working mode, a second status indicator lamp 24 representing a CAN channel working mode and a third status indicator lamp 25 representing a power supply working state. Two interfaces, namely a power interface 28 and a communication interface 29, are arranged at the bottom of the shell, are connected with an external power supply 40 through the power supply 40 interface to supply power to the reader-writer, and are connected with the power module and the power distribution module 60 through the communication interface to acquire relevant parameters of the power module and display the parameters through the display screen 22.
Further, the housing is provided with an installation groove 27 for installing the touch pen 26, and the touch pen 26 is used for switching the display interface.
Further, as shown in fig. 3, the control circuit board 10 in the present embodiment includes a power supply circuit 11, a reset circuit 12, a LIN communication circuit 13, a CAN communication circuit 14, a display screen driving circuit 15, a key detection circuit 16, and a microprocessor 17; the output end of the power supply circuit 11 is respectively connected with the microprocessor 17 and the LIN communication circuit 13, the output end of the key detection circuit 16 and the output end of the reset circuit 12 are respectively connected with the microprocessor 17, the LIN communication circuit 13 and the CAN communication circuit 14 are both connected with the microprocessor 17 for bidirectional communication, and the input end of the display screen driving circuit 15 is connected with the microprocessor 17.
Specifically, as shown in fig. 4, the power supply circuit 11 includes a first power supply circuit including a first power supply module U-SUS6, a first voltage regulator chip SPX1117, a second voltage regulator chip SPX1117, a diode D1, and a light emitting diode LED 1;
the positive voltage input end of the first power supply module is connected with the negative electrode of a diode D1, the positive electrode of a diode D1 is connected with 24V voltage, and a capacitor C16 is connected between the positive voltage input end and the negative voltage input end of the first power supply module; a capacitor C3 and a capacitor C17 are sequentially connected in parallel between a positive voltage output end and a negative voltage output end of the first power supply module, and then the first power supply module is connected with the input end of the first voltage stabilizing chip and the input end of the second voltage stabilizing chip; the output end of the first voltage stabilizing chip is connected with one end of a resistor R3 after being sequentially connected with a capacitor C2 and a capacitor C48, the capacitor C2 is connected with the capacitor C48 in parallel, the other end of the resistor R3 is connected with the anode of the light-emitting diode, the cathode of the light-emitting diode is grounded, the output end of the second voltage stabilizing chip is sequentially connected with a capacitor C4 and a capacitor C8, and one end of the capacitor C4 is connected with working voltage after being connected with a capacitor C8 in parallel, and the other end of the capacitor C4.
The second power supply circuit comprises a second power supply module and a diode D2, the second power supply module adopts an SFS30 chip, a positive voltage input end of the second power supply module is sequentially connected with one end of a capacitor C53, one end of a capacitor C1 and a negative electrode of a diode D2, a positive electrode of a diode D2 is connected with 24V voltage, and the other end of a capacitor C53 is connected with the other end of a capacitor C1, then is grounded and is connected to a negative voltage input end of the second power supply module;
and a capacitor C19, a capacitor C5 and a capacitor C49 are sequentially connected in parallel between the voltage positive output end and the voltage negative output end of the second power supply module, one end of the capacitor C49 is connected with the working voltage, and the other end of the capacitor C49 is grounded.
The power supply circuit 11 is used for converting a 24V direct current power supply input by power supply into a DC15V supplied by LIN communication, a DC5V supplied by a display screen and a CAN communication, and DC3.3V and DC1.8V supplied by a microprocessor 17.
One end of a capacitor C48 in the power circuit 11 is connected with a microprocessing V3 pin, and the other end of a capacitor C48 is connected with a microprocessing VSS pin. One end of the capacitor C8 is connected to the microprocessor V18 pin, and the other end of the capacitor C8 is connected to the microprocessor VSS pin. One end of the capacitor C49 in the power supply circuit 11 is connected to one end of the R15 in the LIN communication circuit 13, and the other end of the capacitor C49 is connected to the communication chip GND in the LIN communication circuit 13.
Specifically, as shown in fig. 5 to 6, the LIN communication circuit 13 includes a LIN communication chip, a diode D5, a resistor R15, a resistor R32, a capacitor C45, and a capacitor C55; an NW interface of the communication chip is connected with one end of a resistor R15, a grounding pin of the communication chip is connected with one end of a capacitor C55, the other end of a resistor R15 is connected with the other end of a capacitor C55 and then is connected with the working voltage of the communication chip, an LIN pin of the communication chip is connected with one end of a capacitor C45, one end of a capacitor C45 is connected with one end of a capacitor C55, an INH pin of the communication chip is connected with the anode of a diode D5, and the cathode of the diode D5 is connected with one end of a capacitor C45 through a resistor R32.
The RXD pin of the communication chip in the LIN communication circuit 13 is connected with the P0.9/RXD pin of the microprocessor, and the TXD pin of the communication chip is connected with the P0.8/TXD pin of the microprocessor.
The LIN communication circuit 13 in this embodiment is used to implement a communication function with an external LIN module. The LIN bus communication circuit comprises 3 cables, one is DC15V (power supply anode), the other is GND (power supply cathode), and the other is a bus (data line, data bus port of LIN communication chip); the RXD and TXD of the LIN communication chip are connected to the microprocessor 17 via serial ports TX (transmit port) and RX (receive port). And the digital signal is interacted with the information of an external module through the LIN bus, so that the acquisition of information parameters is realized. The operation parameter information of the module can be acquired in real time, and the setting parameters stored by the module can also be acquired.
Further, as shown in fig. 7-8, the CAN communication circuit 14 includes a CAN isolation transceiver, a resistor R25, a resistor R26, a resistor R27, a capacitor C8, a capacitor C9, and a capacitor C56, a CANL signal connection pin of the CAN isolation transceiver is connected to one end of a resistor R26, the other end of the resistor R26 is connected to one end of a capacitor C8 and one end of a resistor R25, the other end of the capacitor C8 is grounded, the other end of the resistor R25 is connected to one end of a capacitor C9 and one end of a resistor R27, the other end of the capacitor C9 is grounded, and the other end of the resistor R27 is connected to a CANH signal connection pin of the CAN isolation transceiver; the voltage input pin Vin of the CAN isolation transceiver is connected with one end of a capacitor C56, and the other end of the capacitor C56 is grounded and connected with the power ground pin of the CAN isolation transceiver.
The pin TXD of the CAN isolation transceiver in the CAN communication circuit 14 is connected with the pin TD1 of the microprocessor, and the pin RXD of the CAN isolation transceiver is connected with the pin RD1 of the microprocessor.
The CAN isolation transceiver adopts a CAN communication chip with the model of CTM1050, and CAN communication data is in the form of differential signals and is connected with the power distribution control module through a CAN channel. And acquiring information parameters of the external module through the digital signal. The operation parameter information of the module can be acquired in real time, and the setting parameters stored by the module can also be acquired.
It should be noted that the LIN bus can be hooked with 15 (groups) of power modules 50 at most, and the 4 th (ground wire), 6 th (15V) and 8 th (data line) cores of the control interface XS1 of the power modules 50 form the LIN bus. The serial port of the control circuit board 10 should be connected with the serial port of the power distribution module 60 to realize batch uploading and downloading of parameters. In particular, the TX signal of the control circuit board 10 should be connected with the RX signal of the power distribution module 60, and the RX signal of the control circuit board 10 should be connected with the TX signal of the power distribution module 60.
The control circuit board 10 acquires information of the power module 50 by using the LIN bus, and displays the information through the display screen 22, specifically, the display screen 22 feeds back the state (on-off state, fault state) and the operating parameters (current, voltage, temperature) of the power module 50, and the related parameter information (serial number, function number, node number, alarm parameter, turn-off parameter, other parameters, etc.) of the power module 50.
The control circuit board 10 and the power distribution module 60 in the power distribution parameter reader-writer are interconnected through a CAN bus, and the power module 50 and the power distribution module 60 are interconnected through a LIN bus. By controlling the power distribution module 60, the liquid crystal display displays the CAN address of the power distribution module 60; through indirect control on the power module, the power module can execute corresponding response, and feeds back the module state (on-off state, fault state) and the operation parameters (current, voltage and temperature) and the relevant parameter information (serial number, function number, node number, alarm parameter, turn-off parameter, other parameters and the like) of the module on the liquid crystal display.
Further, as shown in fig. 9, the key detection circuit 16 includes a resistor R8, a resistor R18, a capacitor C10, a resistor R9, a resistor R19, a capacitor C44, a resistor R10, a resistor R20, a capacitor C43, a resistor R11, a resistor R21, a capacitor C41, a resistor R12, a resistor R22, and a capacitor C42;
one end of a resistor R8 is connected with one end of a capacitor C10 through a resistor R18, one end of a resistor R9 is connected with one end of a capacitor C44 through a resistor R19, one end of a resistor R10 is connected with one end of the capacitor C43 through a resistor R20, one end of a resistor R11 is connected with one end of a capacitor C41 through a resistor R21, and one end of the resistor R12 is connected with one end of a capacitor C42 through a resistor R22;
the other end of the resistor R8, the other end of the resistor R9, the other end of the resistor R10, the other end of the resistor R11 and the other end of the resistor R12 are connected and then connected with a 3V working voltage, and the other end of the capacitor C10, the other end of the capacitor C44, the other end of the capacitor C43, the other end of the capacitor C41 and the other end of the capacitor C42 are connected and then grounded.
The connection position of a resistor R18 and one end of a capacitor C10 in the key detection circuit 16 is connected with a P0.27/AIN0 pin of the microprocessor, the connection position of a resistor R19 and one end of a capacitor C44 is connected with a P0.28/AIN1 pin of the microprocessor, the connection position of a resistor R20 and one end of a capacitor C43 is connected with a P0.29/AIN2 pin of the microprocessor, the connection position of a resistor R21 and one end of a capacitor C41 is connected with a P1.18/TRACEPKT2 pin of the microprocessor, and the connection position of a resistor R22 and one end of a capacitor C42 is connected with a P1.17/TRACEPKT1 pin of the microprocessor.
Wherein, the key detection circuit 16 includes: current limiting resistor, filter capacitor. The detection of the up, down, left, right and confirmation key signals is realized, and the microprocessor 17 adjusts the display information of the display screen according to the detected signals.
Further, as shown in fig. 10, the display screen driving circuit 15 includes a flexible board and a touch screen conversion interface chip, and the flexible board is connected to the microprocessor through the touch screen conversion interface chip. The display panel drive circuit 15 includes: digital driving chip, filter capacitor, etc. And the microprocessor displays the acquired information acquired through LIN communication or CAN communication on a display screen through the driving circuit.
The DCLK pin of the driving chip U10 in the display screen driving circuit 15 is connected with the P0.18 pin of the microprocessor, the CS pin of the driving chip U10 is connected with the P0.6 pin of the microprocessor, the DIN pin of the driving chip U10 is connected with the P0.19 pin of the microprocessor, the DOUT pin of the driving chip U10 is connected with the P0.20 pin of the microprocessor, and the PENRO pin of the driving chip U10 is connected with the P0.16 pin of the microprocessor.
Further, as shown in fig. 11, the reset circuit 12 is used for implementing power-on reset of the microprocessor and reset during program downloading, and specifically includes a voltage monitor, a relay K1, a capacitor C57, a capacitor C63, a capacitor C64, a resistor R7 and a resistor R23;
of voltage monitors
The relay K1 is connected between the pin and the PFI pin, a capacitor C64 and a capacitor C63 are sequentially connected in parallel at two ends of the relay K1, the RET pin of the voltage monitor is connected with one end of a resistor R23, the other end of the resistor R23 is connected with the base of a triode, the collector of the triode is connected with one end of a resistor R7 and then connected with the input end of the microprocessor, the other end of the resistor R7 is connected with 3V working voltage, the emitter of the triode is connected with one end of the capacitor C57 and then grounded, and the other end of the capacitor C57 is connected with 3V working voltage.
The microprocessor and the connection end of the collector of the triode in the reset circuit 12 and the resistor R7
And connecting the pins.
LPC2119FBD64 of NXP adopted by the microprocessing mainly realizes the functions of LIN communication, CAN communication, data storage, display driving of a display screen and the like.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A power distribution parameter reader, comprising: the power supply is connected with the control circuit board to supply power to the control circuit board, the control circuit board is connected with the operating equipment through a data line and is connected with the storage equipment through an I2C bus, a control end of the control circuit board is connected with the power module through an LIN bus, the control end of the control circuit board is further connected with one end of the power distribution module through a CAN bus, and the other end of the power distribution module is connected with the power module through the LIN bus.
2. The power distribution parameter reader-writer according to claim 1, wherein the operating device comprises a key and/or a touch pen and a display screen for displaying a control interface, the key and/or the touch pen being connected to a control unit in the display screen.
3. The power distribution parameter reader/writer according to claim 1, further comprising a first status indicator light for indicating a LIN channel operation mode, a second status indicator light for indicating a CAN channel operation mode, and a third status indicator light for displaying a power supply operation status.
4. The power distribution parameter reader-writer according to claim 1, wherein said control circuit board comprises a microprocessor, a power supply circuit, a reset circuit, a LIN communication circuit, a CAN communication circuit, a display screen drive circuit, and a key detection circuit;
the output end of the power supply circuit is connected with the microprocessor and the LIN communication circuit respectively, the output end of the key detection circuit and the output end of the reset circuit are connected with the microprocessor respectively, the LIN communication circuit and the CAN communication circuit are connected with the microprocessor to carry out two-way communication, and the input end of the display screen driving circuit is connected with the microprocessor.
5. The power distribution parameter reader of claim 4, wherein the power supply circuit comprises a first power supply circuit and a second power supply circuit, the first power supply circuit comprising a first power supply module, a first voltage regulation chip, a second voltage regulation chip, a diode D1, and a light emitting diode;
the voltage input end of the first power supply module is connected with the negative electrode of the diode D1, the positive electrode of the diode D1 is connected with 24V voltage, the voltage output end of the first power supply module is respectively connected with the input end of the first voltage stabilizing chip and the input end of the second voltage stabilizing chip, the output end of the first voltage stabilizing chip is connected with the positive electrode of the light emitting diode through a resistor, the negative electrode of the light emitting diode is grounded, and the output end of the second voltage stabilizing chip is connected with the microprocessor;
the second power supply circuit comprises a second power supply module and a diode D2, wherein the voltage input end of the second power supply module is connected with the cathode of the diode D2, the anode of the diode D2 is connected with 24V voltage, and the voltage output end of the second power supply module is connected with the LIN communication circuit.
6. The distribution parameter reader of claim 4, wherein the LIN communication circuit comprises a communication chip, a diode D5, a resistor R15, a resistor R32, a capacitor C45 and a capacitor C55; an NW interface of the communication chip is connected with one end of a resistor R15, a grounding pin of the communication chip is connected with one end of a capacitor C55, the other end of a resistor R15 is connected with the other end of a capacitor C55 and then is connected with the working voltage of the communication chip, an LIN pin of the communication chip is connected with one end of a capacitor C45, one end of a capacitor C45 is connected with one end of a capacitor C55, an INH pin of the communication chip is connected with the anode of a diode D5, and the cathode of the diode D5 is connected with one end of a capacitor C45 through a resistor R32.
7. The power distribution parameter reader-writer according to claim 4, wherein the CAN communication circuit comprises a CAN isolation transceiver, a resistor R25, a resistor R26, a resistor R27, a capacitor C8, a capacitor C9 and a capacitor C56, a CANL signal connection pin of the CAN isolation transceiver is connected with one end of a resistor R26, the other end of the resistor R26 is respectively connected with one end of a capacitor C8 and one end of a resistor R25, the other end of the capacitor C8 is grounded, the other end of the resistor R25 is respectively connected with one end of a capacitor C9 and one end of a resistor R27, the other end of the capacitor C9 is grounded, and the other end of the resistor R27 is connected with a CANH signal connection pin of the CAN isolation transceiver;
the voltage input pin Vin of the CAN isolation transceiver is connected with one end of a capacitor C56, and the other end of the capacitor C56 is grounded and connected with the power ground pin of the CAN isolation transceiver.
8. The power distribution parameter reader-writer according to claim 4, wherein said key detection circuit comprises a resistor R8, a resistor R18, a capacitor C10, a resistor R9, a resistor R19, a capacitor C44, a resistor R10, a resistor R20, a capacitor C43, a resistor R11, a resistor R21, a capacitor C41, a resistor R12, a resistor R22, and a capacitor C42;
one end of a resistor R8 is connected with one end of a capacitor C10 through a resistor R18, one end of a resistor R9 is connected with one end of a capacitor C44 through a resistor R19, one end of a resistor R10 is connected with one end of the capacitor C43 through a resistor R20, one end of a resistor R11 is connected with one end of a capacitor C41 through a resistor R21, and one end of the resistor R12 is connected with one end of a capacitor C42 through a resistor R22;
the other end of the resistor R8, the other end of the resistor R9, the other end of the resistor R10, the other end of the resistor R11 and the other end of the resistor R12 are connected and then connected with a 3V working voltage, and the other end of the capacitor C10, the other end of the capacitor C44, the other end of the capacitor C43, the other end of the capacitor C41 and the other end of the capacitor C42 are connected and then grounded.
9. The power distribution parameter reader-writer of claim 4 wherein the display screen driver circuit comprises a flexible board and a touch screen conversion interface chip, the flexible board being connected to the microprocessor via the touch screen conversion interface chip.
10. The distribution parameter reader of claim 4, wherein the reset circuit comprises a voltage monitor, a relay K1, a capacitor C57, a capacitor C63, a capacitor C64, and a resistor R7 and a resistor R23;
of voltage monitors
A relay K1 is connected between the pin and the PFI pin, a capacitor C64 and a capacitor C63 are connected in parallel at two ends of the relay K1 in sequence, the RET pin of the voltage monitor is connected with one end of a resistor R23, and the other end of a resistor R23 is connected with the base electrode of the triodeThe collector of the triode is connected with one end of a resistor R7 and then connected with the input end of the microprocessor, the other end of the resistor R7 is connected with 3V working voltage, the emitter of the triode is connected with one end of a capacitor C57 and then grounded, and the other end of the capacitor C57 is connected with 3V working voltage.
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