CN217846503U - Electric vehicle instrument panel test circuit - Google Patents
Electric vehicle instrument panel test circuit Download PDFInfo
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- CN217846503U CN217846503U CN202221957098.6U CN202221957098U CN217846503U CN 217846503 U CN217846503 U CN 217846503U CN 202221957098 U CN202221957098 U CN 202221957098U CN 217846503 U CN217846503 U CN 217846503U
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Abstract
The utility model relates to an electric vehicle instrument panel test technical field, discloses an electric vehicle instrument panel test circuit, which comprises a MCU main control unit, an operation key, a display unit, an instrument panel detection unit, a serial communication unit, a light control signal output unit and a voltage output unit; the MCU main control unit is respectively and electrically connected with the operation keys, the display unit, the instrument panel detection unit, the serial port communication unit, the light control signal output unit and the voltage output unit; during actual use, the MCU main control unit sends simulated electric quantity data, simulated speed data or simulated gear data to the electric vehicle instrument panel through the serial port communication unit to simulate that a controller on the electric vehicle actually sends the speed data, the electric quantity data or the gear data to the electric vehicle instrument panel, so that whether corresponding display on the electric vehicle instrument panel is normal or not can be detected; or the lamplight control signal output unit sends a lamplight control signal to the instrument panel of the electric vehicle to detect whether lamplight display on the instrument panel is normal or not.
Description
Technical Field
The utility model relates to an electric motor car panel board test technical field, concretely relates to electric motor car panel board test circuit.
Background
The instrument panel on the electric vehicle is mainly used for speed display, electric quantity display, vehicle lamp state display (including high beam display, low beam display and steering lamp display) and other state information display such as current gear state display; however, the existing electric vehicle instrument panel lacks a test circuit capable of detecting the display quality after the production is finished.
SUMMERY OF THE UTILITY MODEL
In view of the background art not enough, the utility model provides an electric motor car panel board test circuit for the demonstration to the electric motor car panel board is tested.
For solving the technical problem, the utility model provides a following technical scheme: the electric vehicle instrument panel test circuit comprises an MCU main control unit, an operation key, a display unit, an instrument panel detection unit, a serial port communication unit, a light control signal output unit and a voltage output unit; the MCU main control unit is respectively and electrically connected with the operation keys, the display unit, the instrument panel detection unit, the serial port communication unit, the light control signal output unit and the voltage output unit; when the operation key is pressed down, an operation signal in a first level state is input to the MCU main control unit; the instrument panel detection unit inputs an instrument detection signal to the MCU main control unit when being electrically connected with an electric vehicle instrument panel; the MCU main control unit is communicated with an electric vehicle instrument panel through the serial port communication unit; the MCU main control unit inputs a light control signal in a second level state to an electric vehicle instrument panel through the light control signal output unit; the MCU main control unit inputs a voltage adjusting signal to the voltage output unit, and the voltage output unit responds to the voltage adjusting signal and changes the amplitude of output voltage.
In a certain embodiment, the serial port communication unit includes a resistor R61, a diode D10, a resistor R34, a resistor R37, a diode D11, a resistor R1, and a resistor R2; one end of the resistor R61 is electrically connected with the MCU main control unit, the other end of the resistor R61 is grounded sequentially through a diode D10 and a resistor R34, and the cathode of the diode D10 is a first communication end of the serial port communication unit; the other end of the resistor R37 is electrically connected with the MCU; the other end of the resistor R37 is electrically connected with the anode of the diode D11 and one end of the resistor R2 respectively, the cathode of the diode D11 is a second communication end of the serial communication unit and is grounded through the resistor R1, and the other end of the resistor R2 is grounded.
When in-service use, work as the utility model discloses when testing the panel board, MCU main control unit passes through serial communication unit and sends at least one analog data in simulation electric quantity data, simulation speed data and the simulation gear information to the panel board and lets the panel board show.
In a certain embodiment, the operation keys comprise an ascending operation key, a descending operation key and a function operation key, wherein one end of the ascending operation key, one end of the descending operation key and one end of the function operation key are all grounded; the other end of the ascending operation key, the other end of the descending operation key and the other end of the function operation key are respectively and electrically connected with the MCU main control unit; the first level state is a low level state.
In a certain embodiment, the display unit comprises a nixie tube, an LED display lamp and a driving unit, wherein a control end of the driving unit is electrically connected with the MCU main control unit, and a signal output end of the driving unit is electrically connected with the nixie tube and the LED display lamp.
In a certain embodiment, the utility model comprises six light control signal output units, wherein each light control signal output unit comprises a resistor R21, a triode QN5, a resistor RA5, a resistor RD5, a resistor RB5 and a triode QO5; resistance R21 one end with MCU master control unit electricity is connected, the resistance R21 other end is connected with triode QN 5's base electricity, triode QN 5's projecting pole ground connection, triode QN 5's collecting electrode is connected with resistance RA5 one end electricity, the resistance RA5 other end is connected with triode QO 5's base and resistance RD5 one end electricity respectively, the resistance RD5 other end is connected with resistance RB5 one end and triode QO 5's projecting pole electricity respectively, resistance RB5 other end input drive voltage, triode QO 5's projecting pole is the light control signal output part of light control signal output unit.
During actual use, the MCU main control unit inputs an outline marker lamp control signal, a headlamp control signal, a dipped headlight control signal, a left turn lamp control signal, a right turn lamp control signal and a seat heating lamp control signal to the instrument panel through the six light control signal output units so as to enable corresponding lamps on the instrument panel to be displayed in a lighting mode.
In a certain embodiment, the instrument panel detection unit includes a resistor R3, a resistor R4 and a capacitor C1, one end of the resistor R3 is electrically connected to a light control signal output end of one light control signal output unit, the other end of the resistor R3 is electrically connected to the MCU main control unit, one end of the capacitor C1 and the other end of the resistor R4, and the other end of the capacitor C1 and the other end of the resistor R4 are both grounded.
In a certain embodiment, the lighting control circuit further comprises a DC-DC voltage conversion unit, wherein the DC-DC voltage conversion unit converts an input voltage into working voltages of the MCU main control unit, the light control signal output unit, and the display unit.
Compared with the prior art, the utility model the beneficial effect who has is: when in actual use, the MCU main control unit of the utility model can send simulated electric quantity data, simulated speed data or simulated gear data to the electric vehicle instrument panel through the serial port communication unit to simulate the controller on the electric vehicle to actually send speed data, electric quantity data or gear data to the electric vehicle instrument panel, thereby detecting whether the corresponding display on the electric vehicle instrument panel is normal; in addition, the MCU main control unit sends a light control signal to the electric vehicle instrument panel through the light control signal output unit to simulate the electric vehicle controller to actually control the lamp on the electric vehicle, and can detect whether the light display on the electric vehicle instrument panel is normal or not.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a circuit diagram of a single chip microcomputer of the MCU main control unit;
FIG. 3 is a circuit diagram of the operation key;
FIG. 4 is a schematic structural diagram of an LED display unit;
FIG. 5 is a circuit diagram of an LED display unit;
FIG. 6 is a circuit diagram of six light control signal output units;
FIG. 7 is a circuit diagram of the instrument panel detection unit and a light control signal output unit;
fig. 8 is a circuit diagram of a DC-DC voltage converting unit;
fig. 9 is a circuit diagram of the serial port communication unit.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the electric vehicle instrument panel test circuit includes an MCU main control unit 1, an operation key 2, a display unit 3, an instrument panel detection unit 6, a serial communication unit 4, a light control signal output unit 5, a voltage output unit 7, and a DC-DC voltage conversion unit 8;
the MCU main control unit 1 is respectively and electrically connected with the operation keys 2, the display unit 3, the instrument panel detection unit 6, the serial port communication unit 4, the lamplight control signal output unit 5, the voltage output unit 7 and the DC-DC voltage conversion unit 8;
when the operation key 2 is pressed down, an operation signal in a first level state is input to the MCU main control unit 1; the instrument panel detection unit 6 inputs an instrument detection signal to the MCU main control unit 1 when being electrically connected with an electric vehicle instrument panel; the MCU main control unit 2 is communicated with an electric vehicle instrument panel through a serial port communication unit 4; the MCU main control unit 1 inputs a light control signal in a second level state to an electric vehicle instrument panel through the light control signal output unit 5; the MCU main control unit 1 inputs a voltage regulation signal to the voltage output unit 7, and the voltage output unit 7 responds to the voltage regulation signal and changes the amplitude of output voltage; the DC-DC voltage conversion unit 8 converts the input voltage into the working voltages of the MCU main control unit 1, the light control signal output unit 5, and the display unit 3.
In this embodiment, the voltage output unit 7 is prior art, can adopt PWM voltage regulation circuit, also can adopt operational amplifier circuit, with operational amplifier circuit input fixed voltage, the amplification ratio that changes transport amplifier circuit through MCU main control unit 1 can change the voltage value that transport amplifier circuit input to the electric motor car panel board, wherein adjust transport amplifier circuit's amplification ratio just can adjust transport amplifier circuit's amplification ratio through the resistance that adopts digital potentiometer to come as transport amplifier circuit's amplification ratio regulation resistance and adjust digital potentiometer through MCU main control unit 1.
Specifically, in this embodiment, the MCU main control unit 1 includes a single chip microcomputer U1 as shown in fig. 2, the single chip microcomputer U1 includes a serial port communication interface and an input/output interface, and the input/output interface may be configured to receive or output a low-level or high-level signal.
Specifically, the circuit diagram of the DC-DC voltage converting unit 8 is shown in fig. 8, and the circuit converts the input voltage Vin into the output voltages VCC, VOUT1, and 12V, respectively, which are used for power supply of the entire circuit.
Specifically, as shown in fig. 9, the serial port communication unit 4 includes a resistor R61, a diode D10, a resistor R34, a resistor R37, a diode D11, a resistor R1, and a resistor R2; one end of the resistor R61 is electrically connected with a pin No. 3 of the MCU main control unit 1, namely the singlechip U1, the other end of the resistor R61 is grounded through a diode D10 and a resistor R34 in sequence, and the cathode of the diode D10 is a first communication end of the serial port communication unit 4; the other end of the resistor R37 is electrically connected with a No. 4 pin of the MCU main control unit 1, namely the singlechip U1; the other end of the resistor R37 is electrically connected with the anode of the diode D11 and one end of the resistor R2 respectively, the cathode of the diode D11 is a second communication end of the serial communication unit 4 and is grounded through the resistor R1, and the other end of the resistor R2 is grounded.
When in-service use, work as the utility model discloses when testing the panel board, MCU main control unit 1 lets the panel board show through serial communication unit 4 to the panel board send at least one analog data in simulation electric quantity data, analog speed data and the simulation gear information to this detects whether normal is shown in the correspondence of electric motor car panel board.
Specifically, as shown in fig. 3, the operation keys 2 include an UP operation key UP, a down operation key DN and a function operation key FN, and one end of the UP operation key UP, one end of the down operation key DN and one end of the function operation key FN are all grounded; the other end of the ascending operation key UP, the other end of the descending operation key DN and the other end of the function operation key FN are electrically connected with a No. 15 pin, a No. 16 pin and a No. 18 pin of the MCU main control unit 1, namely the singlechip U1 respectively through a resistor R8, a resistor R12 and a resistor R13; the first level state is a low level state. In actual use, the UP operation key UP and the down operation key DN may be used for speed parameter setting or gear parameter setting, the parameter value may be increased by pressing the UP operation key UP, the parameter value may be decreased by pressing the down operation key DN, and the function operation key FN may be used for display screen switching and parameter storage of an electric vehicle dashboard, for example, by pressing the function operation key FN once, screen switching may be performed, and by pressing the function operation key FN all the time within a prescribed time, the current parameter value may be set.
As shown in fig. 4, the display unit 3 includes a nixie tube 32, an LED display lamp 31 and a driving unit 30, a control end of the driving unit 30 is electrically connected to the MCU main control unit 1, and a signal output end of the driving unit 30 is electrically connected to the nixie tube 32 and the LED display lamp 31.
As shown in fig. 5, the driving unit 30 includes a driving chip U2, the LED display lamp 31 includes a display lamp L1, a display lamp L2, a display lamp L3, a display lamp L4 and a display lamp L5, the pin No. 2, the pin No. 3 and the pin No. 4 of the driving chip U2 are electrically connected to the pin No. 23, the pin No. 22 and the pin No. 17 of the single chip microcomputer U1 of the MCU main control unit 1 to receive a display control instruction sent by the single chip microcomputer U1, and control the display value of the nixie tube U2 and the on/off of the display lamp in the LED display lamp 31.
In actual use, the display unit 30 is used for human-computer interaction, and displays the current test state of the instrument panel of the electric vehicle.
As shown in fig. 6, in this embodiment, the present invention includes six light control signal output units 5, and taking the uppermost light control signal output unit 5 as an example, the light control signal output unit 5 includes a resistor R21, a transistor QN5, a resistor RA5, a resistor RD5, a resistor RB5, and a transistor QO5; resistance R21 one end is connected with MCU main control unit 1 electricity, the resistance R21 other end is connected with triode QN 5's base electricity, triode QN 5's projecting pole ground connection, triode QN 5's collecting electrode is connected with resistance RA5 one end electricity, the resistance RA5 other end is connected with triode QO 5's base and resistance RD5 one end electricity respectively, the resistance RD5 other end is connected with resistance RB5 one end and triode QO 5's projecting pole electricity respectively, resistance RB5 other end input drive voltage, triode QO 5's projecting pole is light control signal output part of light control signal output unit 5.
Wherein, the light control signal output end SK, the light control signal output end JG, the light control signal output end DD, the light control signal output end YZ, the light control signal output end ZZ and the light control signal output end JR of the six light control signal output units 5 respectively output a clearance lamp control signal, a dipped headlight control signal, a right turn lamp control signal, a left turn lamp control signal and a seat heating lamp control signal to the electric vehicle instrument panel to enable the corresponding lamps on the instrument panel to be lighted and displayed.
Similarly, taking the uppermost light control signal output unit 5 as an example, when a high-level driving signal is input to the base of the transistor QN5, the transistor QO5 is turned on, and at this time, the light control signal output terminal SK inputs a high-level clearance lamp control signal to the dashboard of the electric vehicle to illuminate the clearance lamp on the dashboard of the electric vehicle, if the clearance lamp on the dashboard of the electric vehicle is illuminated, the display of the clearance lamp is considered to be normal, otherwise, the display of the clearance lamp is considered to be abnormal.
As shown in fig. 7, the instrument panel detection unit 6 includes a resistor R3, a resistor R4 and a capacitor C1, one end of the resistor R3 is electrically connected to the light control signal output end of one light control signal output unit 5, the other end of the resistor R3 is electrically connected to the MCU main control unit 1, one end of the capacitor C1 and the other end of the resistor R4, and the other end of the capacitor C1 and the other end of the resistor R4 are all grounded.
When in actual use, when panel board detecting element 6 is connected with electric motor car panel board electricity, DD _ VOL terminal voltage changes, thereby MCU main control unit detects the change of this port voltage and judges the utility model discloses whether be connected with the electric motor car panel board, whether can begin the test.
In conclusion, when in actual use, the utility model discloses a MCU main control unit 1 can send simulation electric quantity data, simulation speed data or simulation gear data to the electric motor car panel board through serial communication unit 4, come the controller of simulation electric motor car and actually send speed data, electric quantity data or gear data to the electric motor car panel board to can detect whether the corresponding demonstration on the electric motor car panel board is normal; in addition, the MCU main control unit 1 sends a light control signal to the electric vehicle instrument panel through the light control signal output unit 5 to simulate the electric vehicle controller to actually control the lamp on the electric vehicle, and can detect whether the light display on the electric vehicle instrument panel is normal or not.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The electric vehicle instrument panel test circuit is characterized by comprising an MCU main control unit, an operation key, a display unit, an instrument panel detection unit, a serial port communication unit, a light control signal output unit and a voltage output unit; the MCU main control unit is respectively and electrically connected with the operation keys, the display unit, the instrument panel detection unit, the serial port communication unit, the light control signal output unit and the voltage output unit; when the operation key is pressed down, an operation signal in a first level state is input to the MCU main control unit; the instrument panel detection unit inputs an instrument detection signal to the MCU main control unit when being electrically connected with an electric vehicle instrument panel; the MCU main control unit is communicated with an electric vehicle instrument panel through the serial port communication unit; the MCU main control unit inputs a light control signal in a second level state to an electric vehicle instrument panel through the light control signal output unit; the MCU main control unit inputs a voltage adjusting signal to the voltage output unit, and the voltage output unit responds to the voltage adjusting signal and changes the amplitude of output voltage.
2. The electric vehicle instrument panel test circuit according to claim 1, wherein the serial port communication unit comprises a resistor R61, a diode D10, a resistor R34, a resistor R37, a diode D11, a resistor R1 and a resistor R2; one end of the resistor R61 is electrically connected with the MCU main control unit, the other end of the resistor R61 is grounded sequentially through a diode D10 and a resistor R34, and the cathode of the diode D10 is a first communication end of the serial port communication unit; the other end of the resistor R37 is electrically connected with the MCU main control unit; the other end of the resistor R37 is electrically connected with the anode of the diode D11 and one end of the resistor R2 respectively, the cathode of the diode D11 is a second communication end of the serial communication unit and is grounded through the resistor R1, and the other end of the resistor R2 is grounded.
3. The electric vehicle instrument panel test circuit according to claim 1, wherein the operation keys comprise an ascending operation key, a descending operation key and a function operation key, and one end of the ascending operation key, one end of the descending operation key and one end of the function operation key are all grounded; the other end of the ascending operation key, the other end of the descending operation key and the other end of the function operation key are respectively and electrically connected with the MCU main control unit; the first level state is a low level state.
4. The electric vehicle instrument panel test circuit according to claim 1, wherein the display unit comprises a nixie tube, an LED display lamp and a driving unit, a control end of the driving unit is electrically connected with the MCU main control unit respectively, and a signal output end of the driving unit is electrically connected with the nixie tube and the LED display lamp respectively.
5. The electric vehicle instrument panel test circuit according to claim 1, comprising six light control signal output units, wherein the light control signal output units comprise a resistor R21, a triode QN5, a resistor RA5, a resistor RD5, a resistor RB5 and a triode QO5; resistance R21 one end with MCU master control unit electricity is connected, the resistance R21 other end is connected with triode QN 5's base electricity, triode QN 5's projecting pole ground connection, triode QN 5's collecting electrode is connected with resistance RA5 one end electricity, the resistance RA5 other end is connected with triode QO 5's base and resistance RD5 one end electricity respectively, the resistance RD5 other end is connected with resistance RB5 one end and triode QO 5's projecting pole electricity respectively, resistance RB5 other end input drive voltage, triode QO 5's projecting pole is the light control signal output part of light control signal output unit.
6. The electric vehicle instrument panel test circuit according to claim 5, wherein the instrument panel detection unit comprises a resistor R3, a resistor R4 and a capacitor C1, one end of the resistor R3 is electrically connected with a light control signal output end of a light control signal output unit, the other end of the resistor R3 is electrically connected with the MCU main control unit, one end of the capacitor C1 and the other end of the resistor R4 respectively, and the other end of the capacitor C1 and the other end of the resistor R4 are grounded.
7. The electric vehicle instrument panel test circuit of claim 5, further comprising a DC-DC voltage conversion unit, wherein the DC-DC voltage conversion unit converts an input voltage into a working voltage of the MCU main control unit, the light control signal output unit and the display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221957098.6U CN217846503U (en) | 2022-07-27 | 2022-07-27 | Electric vehicle instrument panel test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221957098.6U CN217846503U (en) | 2022-07-27 | 2022-07-27 | Electric vehicle instrument panel test circuit |
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| Publication Number | Publication Date |
|---|---|
| CN217846503U true CN217846503U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221957098.6U Active CN217846503U (en) | 2022-07-27 | 2022-07-27 | Electric vehicle instrument panel test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217846503U (en) |
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2022
- 2022-07-27 CN CN202221957098.6U patent/CN217846503U/en active Active
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