An embedded experiment platform

Abstract

The utility model discloses an embedded experiment table, include: equipment rack, experiment board, experiment board includes main control module, high side drive circuit, low side drive circuit and a plurality of wiring hole, main control module is connected with the controlled end of high side drive circuit and the controlled end of low side drive circuit electricity respectively, and the output of high side drive circuit and low side drive circuit is used to access the device to be experimented through wiring hole, host computer, host computer is connected with experiment board electricity, and host computer is still used to access input equipment, and host computer is used to according to the program code of input equipment input, and the corresponding control signal is exported to experiment board to make main control module control high side drive circuit and / or low side drive circuit work, wherein, experiment board and host computer all are located on equipment rack, the utility model aims at satisfying the teaching demand of automobile type embedded development.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment technology, and in particular to an embedded experimental platform. Background Technology

[0002] Embedded systems, as specialized computer systems, are widely used in various fields such as industrial control, consumer electronics, communication equipment, and medical devices. With the rapid development of embedded technology, the number of companies engaged in embedded development has increased rapidly, covering the entire industry chain from chip design and hardware circuit development to embedded software programming. However, in the niche market of automotive embedded development teaching equipment, there are relatively few related companies and products. Utility Model Content

[0003] The main purpose of this invention is to propose an embedded experimental platform that aims to meet the teaching needs of automotive embedded development.

[0004] To achieve the above objectives, this utility model proposes an embedded experimental platform, comprising:

[0005] Equipment stand;

[0006] The experimental board includes a main control module, a high-side driving circuit, a low-side driving circuit, and multiple wiring holes. The main control module is electrically connected to the controlled terminals of the high-side driving circuit and the low-side driving circuit, respectively. The output terminals of the high-side driving circuit and the low-side driving circuit are used to connect to the experimental device through the wiring holes.

[0007] The host computer is electrically connected to the experimental board. The host computer is also used to connect to an input device. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module controls the high-side drive circuit and / or the low-side drive circuit to work.

[0008] The experimental board and the host computer are both mounted on the equipment stand.

[0009] In one embodiment, the high-side driving circuit includes:

[0010] The system comprises a first optocoupler isolation circuit, a first driving circuit, and a first switching circuit. The first optocoupler isolation circuit includes a first input-side circuit and a first output-side circuit. The input terminal of the first input-side circuit is connected to a first voltage, and the output terminal of the first input-side circuit is electrically connected to the main control module.

[0011] The input terminal of the first driving circuit is connected to a second voltage. The controlled terminal of the first driving circuit is connected to the input terminal of the first output side circuit. The output terminal of the first output side circuit is grounded. The output terminal of the first driving circuit is connected to the controlled terminal of the first switching circuit. The input terminal of the first switching circuit is used to connect to the power supply terminal. The output terminal of the first switching circuit is used to connect to the device under test.

[0012] The low-side driving circuit includes:

[0013] The second optocoupler isolation circuit, the second driving circuit, and the second switching circuit are provided. The second optocoupler isolation circuit includes a second input side circuit and a second output side circuit. The input terminal of the second input side circuit is connected to a first voltage, and the output terminal of the second input side circuit is electrically connected to the main control module.

[0014] The controlled terminal of the second driving circuit is connected to the output terminal of the second output side circuit. The input terminal of the second output side circuit is used to connect to the second voltage. The input terminal of the second driving circuit is connected to the controlled terminal of the second switching circuit. The output terminal of the second driving circuit is grounded. The input terminal of the second switching circuit is used to connect to the power supply terminal. The output terminal of the second switching circuit is used to connect to the device under test.

[0015] In one embodiment, the first driving circuit includes: a first resistor, a second resistor, and a first switching transistor. The first end of the first resistor and the first end of the second resistor are both connected to the input terminal of the first output side. The first end of the first resistor and the first end of the first switching transistor are both connected to a second voltage. The second end of the second resistor is connected to the controlled terminal of the first switching transistor.

[0016] The first switching circuit includes: a first light-emitting diode (LED), a third resistor, a fourth resistor, a first diode, a first relay, and a first single-pole double-throw (SPDT) switch. The anode of the first LED, the cathode of the first LED, and the first terminal of the fourth resistor are all connected to the output terminal of the first switching transistor. The cathode of the first LED is connected to the first terminal of the third resistor. The second terminal of the third resistor and the anode of the first diode are both grounded. The second terminal of the fourth resistor is connected to the first terminal of the first relay, and the second terminal of the first relay is grounded. The first terminal of the first SPDT switch is used to connect to a power supply terminal, the second terminal of the first SPDT switch is grounded, and the third terminal of the first SPDT switch is used to connect to the device under test. The first relay is magnetically connected to the first SPDT switch.

[0017] The second driving circuit includes: a fifth resistor, a sixth resistor, and a second switching transistor. The first ends of the fifth resistor and the sixth resistor are both connected to the output terminal of the second output side. The second end of the fifth resistor is grounded. The controlled terminal of the second switching transistor is connected to the second end of the sixth resistor. The output terminal of the second switching transistor is grounded.

[0018] The second switching circuit includes: a second light-emitting diode (LED), a second diode, a seventh resistor, an eighth resistor, a second relay, and a second single-pole double-throw (SPDT) switch. The anode of the second LED is connected to the input terminal of the second output side, and the cathode of the second LED is connected to the first terminal of the seventh resistor. The cathode of the first diode is used to connect to a second voltage. The anode of the second diode is connected to the second terminal of the seventh resistor and the input terminal of the second switch, respectively. The first terminal of the second relay is connected to the cathode of the second diode, and the second terminal of the second relay is connected to the second terminal of the eighth resistor. The first terminal of the eighth resistor is connected to the input terminal of the second switch. The first terminal of the second SPDT switch is used to connect to a power supply terminal, and the second terminal of the second SPDT switch is grounded. The third terminal of the second SPDT switch is used to connect to the device under test. The second relay is magnetically connected to the second SPDT switch.

[0019] In one embodiment, the experimental board further includes:

[0020] The system comprises a first driving module, a second driving module, a third switching transistor, a fourth switching transistor, a fifth switching transistor, and a sixth switching transistor. The input terminals of the third and fifth switching transistors are both connected to a second voltage. The input terminal of the fourth switching transistor is connected to the output terminal of the third switching transistor. The input terminal of the sixth switching transistor is connected to the output terminal of the fifth switching transistor. The output terminals of the fourth and sixth switching transistors are both grounded.

[0021] The controlled terminals of the third and fourth switching transistors are both connected to the first driving circuit, the controlled terminals of the fifth and sixth switching transistors are both connected to the second driving circuit, and the first driving module and the second driving module are both connected to the main control module.

[0022] The embedded experimental platform also includes a motor, the first power supply terminal of which is connected to the output terminal of the third switching transistor, and the second power supply terminal of which is connected to the output terminal of the fifth switching transistor.

[0023] In one embodiment, the embedded experimental platform further includes:

[0024] An accelerator pedal and a first Hall effect sensor are included. The first Hall effect sensor is electrically connected to the accelerator pedal and the main control module, respectively. The first Hall effect sensor is used to collect the pressing depth of the accelerator pedal and output a first detection signal.

[0025] The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module processes the first detection signal and outputs it to the host computer.

[0026] In one embodiment, the embedded experimental platform further includes:

[0027] The system includes a brake pedal and a second Hall effect sensor. The second Hall effect sensor is electrically connected to both the brake pedal and the main control module. The second Hall effect sensor is used to collect the pedal depth and output a corresponding second detection signal.

[0028] The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module processes the second detection signal and outputs it to the host computer.

[0029] In one embodiment, the experimental board further includes a signal processing circuit, and the embedded experimental platform further includes a wheel, which is used to output a corresponding rotation speed input signal when rotating. The signal processing circuit is electrically connected to the wheel and the main control module respectively.

[0030] The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module controls the signal processing circuit to process the speed input signal and output it to the host computer.

[0031] In one embodiment, the embedded experimental platform further includes:

[0032] A temperature detection circuit is electrically connected to the main control module; the host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device; the temperature detection circuit is used to detect the current room temperature and output corresponding temperature detection signals to the main control module; the main control module is used to process the temperature detection signals and output them to the host computer.

[0033] In one embodiment, the experimental board further includes a vehicle light driving circuit, and the embedded experimental platform further includes a vehicle light. The vehicle light driving circuit is electrically connected to the main control module and the vehicle light, respectively. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module controls the vehicle light driving module to drive the vehicle light to light up.

[0034] In one embodiment, the embedded experimental platform further includes a Hall current sensor, which detects the current of the circuit under test and outputs a corresponding current detection signal; the Hall current sensor is electrically connected to the main control module; the host computer is used to output a corresponding control signal to the experimental board according to the program code input by the input device, so that the main control module processes the current detection signal.

[0035] This utility model relates to an embedded experimental platform, comprising a device frame; an experimental board including a main control module, a high-side drive circuit, a low-side drive circuit, and multiple wiring holes. The main control module is electrically connected to the controlled terminals of the high-side drive circuit and the low-side drive circuit, respectively. The output terminals of the high-side drive circuit and the low-side drive circuit are used to connect to the experimental device via the wiring holes; and a host computer electrically connected to the experimental board. The host computer outputs corresponding control signals to the experimental board based on the program code input by the input device, so that the main control module controls the high-side drive circuit and / or the low-side drive circuit to operate. Both the experimental board and the host computer are mounted on the device frame. With this configuration, in practical applications, users can connect the experimental device to the output terminals of the high-side drive circuit or the low-side drive circuit via the wiring holes, thereby achieving electrical connection with the high-side drive circuit or the low-side drive circuit. Users can then write and input custom program code on the host computer to control the main control module to generate corresponding drive signals, thereby controlling the high-side or low-side drive circuit to operate and achieve control of the experimental device. The experiment not only helps users gain a deeper understanding of the working principles of high-side and low-side drives and their application scenarios in automotive electronics, but also allows users to apply the theoretical knowledge they have learned to actual load control, cultivate their comprehensive practical ability, and lay a foundation for future work in related fields. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a module according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of a module according to another embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the circuit structure of an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of a module according to another embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of a module according to another embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of a module according to another embodiment of the present utility model;

[0043] Figure 7 This is a schematic diagram of a module according to another embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of a module according to another embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of a module according to another embodiment of the present invention;

[0046] Figure 10 This is a circuit diagram of another embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of a module according to another embodiment of the present invention.

[0048] Explanation of icon numbers:

[0049] 10. Equipment stand; 20. Experimental board; 30. Main control module; 40. High-side drive circuit; 41. First optocoupler isolation circuit; 42. First drive circuit; 43. First switch circuit; 50. Low-side drive circuit; 51. Second optocoupler isolation circuit; 52. Second drive circuit; 53. Second switch circuit; 60. Host computer; 70. First Hall sensor; 80. Brake pedal; 90. Second Hall sensor; 100. Wheel; 110. Signal processing circuit; 120. Temperature detection circuit; 130. Headlight drive circuit; 140. Headlight; 150. Hall current sensor; 160. Accessory board; 170. First drive module; 180. Second drive module; 190. Accelerator pedal.

[0050] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0052] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0053] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0054] Embedded systems, as specialized computer systems, are widely used in various fields such as industrial control, consumer electronics, communication equipment, and medical devices. With the rapid development of embedded technology, the number of companies engaged in embedded development has increased rapidly, covering the entire industry chain from chip design and hardware circuit development to embedded software programming. However, in the niche market of automotive embedded development teaching equipment, there are relatively few related companies and products.

[0055] Therefore, this utility model proposes an embedded experimental platform. In one embodiment, referring to... Figure 1 The embedded experimental platform includes:

[0056] 10 equipment stands;

[0057] Experimental board 20 includes a main control module 30, a high-side driving circuit 40, a low-side driving circuit 50, and multiple wiring holes. The main control module 30 is electrically connected to the controlled terminals of the high-side driving circuit 40 and the low-side driving circuit 50, respectively. The output terminals of the high-side driving circuit 40 and the low-side driving circuit 50 are used to connect to the experimental device through the wiring holes.

[0058] The host computer 60 is electrically connected to the experimental board 20. The host computer 60 is used to output corresponding control signals to the experimental board 20 according to the program code input by the input device, so that the main control module 30 controls the high-side drive circuit 40 and / or the low-side drive circuit 50 to work.

[0059] The experimental board 20 and the host computer 60 are both mounted on the equipment stand 10.

[0060] In this embodiment, the equipment stand 10 has mounting holes for mounting the host computer 60 and the experimental board 20, which allow the host computer 60 and the experimental board 20 to be mounted on the equipment stand 10 by bolts. This can prevent loosening or tipping caused by vibration, collision or movement, and ensure that the equipment remains stable during the experiment.

[0061] In this embodiment, the experimental board 20 is a circuit board for integrating various functional circuits. Each wiring hole corresponds to a certain functional circuit on the experimental board 20. Users can quickly connect the device to be tested to the corresponding circuit through the wiring hole.

[0062] In this embodiment, reference Figure 11 The experimental platform also includes one or more accessory boards 160, which are used to place the experimental devices so that users can directly take the required experimental devices from the accessory boards 160 when conducting experiments.

[0063] In this embodiment, the input device (such as a touch screen or keyboard) is used for user interaction with the programming software of the host computer 60. The user can write, edit, or input custom program code through the input device, and the host computer 60 compiles and burns the written program code into the main control module 30 of the experimental board 20. After running the burned program code, the main control module 30 can generate control signals according to the code logic, thereby driving the high-side drive circuit 40 or the low-side drive circuit 50 to work, ultimately realizing the control of the connected experimental device.

[0064] It should be noted that the lighting systems such as headlights, taillights, and turn signals in new energy vehicles, as well as cooling water pumps or radiator fans, are typically controlled by the high-side drive circuit 40. The window operation, ABS solenoid valve control, and wiper speed adjustment in new energy vehicles are typically controlled by the low-side drive circuit 50. The embedded experimental platform can connect these devices as experimental subjects to either the high-side drive circuit 40 or the low-side drive circuit 50, allowing users to deeply learn the working principles and typical application scenarios of the two drive methods, thereby mastering relevant technical knowledge and improving practical skills.

[0065] In this embodiment, the high-side drive circuit 40 can be implemented using at least one switching transistor. For example, the high-side drive circuit 40 uses a P-channel MOSFET (PMOS) as the switching element, with the source of the PMOS connected to the positive terminal of the power supply, the drain connected to the device under test, and the gate receiving a control signal. The high-side drive circuit 40 controls the connection between the device under test and the power supply to switch the device on and off. The low-side drive circuit 50 can also be implemented using at least one switching transistor. For example, the low-side drive circuit 50 uses an N-channel MOSFET (NMOS) as the switching element, with the drain of the NMOS connected to the device under test, the source grounded, and the gate receiving a control signal. The low-side drive circuit 50 controls the connection between the device under test and ground to switch the device on and off.

[0066] In this embodiment, the main control module 30 can be implemented using a main controller, such as an MCU (Microcontroller Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or a SOC (System On Chip).

[0067] In this embodiment, the host computer 60 can be implemented using any one of a general-purpose computer, an industrial tablet computer, or an embedded system.

[0068] With the above setup, in practical applications, users can connect the device under test to the output terminal of the high-side drive circuit 40 or the low-side drive circuit 50 through the wiring holes, thereby achieving electrical connection with the high-side drive circuit 40 or the low-side drive circuit 50. Custom program code can be written and input into the host computer 60 to control the main control module 30 to generate corresponding drive signals, thus controlling the high-side or low-side drive circuit 50 to operate and control the device under test. During the experiment, users not only gain a deeper understanding of the working principles of high-side and low-side drives and their application scenarios in automotive electronics, but also apply their theoretical knowledge to actual load control, cultivating their comprehensive practical abilities and laying a foundation for future work in related fields.

[0069] In one embodiment of this utility model, reference is made to Figure 2 The high-side driving circuit 40 includes:

[0070] The system comprises a first optocoupler isolation circuit 41, a first driving circuit 42, and a first switching circuit 43. The first optocoupler isolation circuit 41 includes a first input side circuit and a first output side circuit. The input terminal of the first input side circuit is connected to a first voltage, and the output terminal of the first input side circuit is electrically connected to the main control module 30.

[0071] The input terminal of the first driving circuit 42 is connected to a second voltage. The controlled terminal of the first driving circuit 42 is connected to the input terminal of the first output side circuit. The output terminal of the first output side circuit is grounded. The output terminal of the first driving circuit 42 is connected to the controlled terminal of the first switching circuit 43. The input terminal of the first switching circuit 43 is used to connect to the power supply terminal. The output terminal of the first switching circuit 43 is used to connect to the device under test.

[0072] The low-side driving circuit 50 includes:

[0073] The second optocoupler isolation circuit 51, the second driving circuit 52, and the second switching circuit 53 are provided. The second optocoupler isolation circuit 51 includes a second input side circuit and a second output side circuit. The input terminal of the second input side circuit is connected to a first voltage, and the output terminal of the second input side circuit is electrically connected to the main control module 30.

[0074] The controlled terminal of the second driving circuit 52 is connected to the output terminal of the second output side circuit. The input terminal of the second output side circuit is used to connect to the second voltage. The input terminal of the second driving circuit 52 is connected to the controlled terminal of the second switching circuit 53. The output terminal of the second driving circuit 52 is grounded. The input terminal of the second switching circuit 53 is used to connect to the power supply terminal. The output terminal of the second switching circuit 53 is used to connect to the device under test.

[0075] In this embodiment, the first optocoupler isolation circuit 41 can be implemented using at least one optocoupler. In a specific embodiment, refer to... Figure 3 The first optocoupler isolation circuit 41 includes a first optocoupler and a ninth resistor R9. The first input-side circuit consists of the light-emitting diode of the first optocoupler and the ninth resistor R9, and the first output-side circuit consists of the phototransistor of the first optocoupler. The second optocoupler isolation circuit 51 can be implemented using at least one optocoupler. In one specific embodiment, refer to... Figure 3 The second optocoupler isolation circuit 51 includes a second optocoupler and a tenth resistor R10. The second input side circuit is the light-emitting diode of the second optocoupler and the tenth resistor R10, and the second output side circuit is the phototransistor of the second optocoupler.

[0076] In this embodiment, the first switching circuit 43 and the second switching circuit 53 can be implemented using at least one switching transistor, such as a MOSFET, IGBT, thyristor, transistor, power transistor, etc., and / or using switching devices, such as contactors, circuit breakers and relays.

[0077] In this embodiment, when the main control module 30 sends a low-level signal to the output terminal of the first input-side circuit, the light-emitting diode in the first input-side circuit of the first optocoupler isolation circuit 41 is turned on and emits a light signal. The light signal is received by the photosensitive receiver in the first output-side circuit and converted into an electrical signal. After receiving the signal from the first output-side circuit, the controlled terminal of the first driving circuit 42 uses the second voltage to generate a driving signal suitable for the operation of the first switching circuit 43. After receiving the driving signal, the controlled terminal of the first switching circuit 43 connects the power supply terminal to the device under test to enable the device under test to operate. The operation process of the low-side driving circuit 50 is the same as that of the high-side driving circuit 40 described above, and will not be repeated here.

[0078] In this embodiment, the optocoupler isolation circuit achieves electrical isolation between the main control module 30 and the drive circuit through optocoupler coupling. Even if the drive circuit fails (such as high-voltage breakdown or surge), it will not affect the main control module 30 or the experimenters. This ensures that users do not need to worry about the main control module 30 burning out or the risk of electric shock due to operational errors (such as incorrect wiring) when conducting experiments with high-power loads (such as motors or solenoid valves).

[0079] In one specific embodiment, reference is made to Figure 3 The first driving circuit 42 includes: a first resistor R1, a second resistor R2 and a first switch Q1. The first end of the first resistor R1 and the first end of the second resistor R2 are both connected to the input terminal of the first output side. The first end of the first resistor R1 and the first end of the first switch Q1 are both connected to a second voltage. The second end of the second resistor R2 is connected to the controlled terminal of the first switch Q1.

[0080] The first switching circuit 43 includes: a first light-emitting diode D2, a third resistor R3, a fourth resistor R4, a first diode D1, a first relay K1, and a first single-pole double-throw switch S1. The anode of the first light-emitting diode D2, the cathode of the first diode D1, and the first end of the fourth resistor R4 are all connected to the output terminal of the first switching transistor Q1. The cathode of the first light-emitting diode D2 is connected to the first end of the third resistor R3. The second end of the third resistor R3 and the anode of the first diode D1 are both grounded. The second end of the fourth resistor R4 is connected to the first end of the first relay K1, and the second end of the first relay K1 is grounded. The first end of the first single-pole double-throw switch S1 is used to connect to the power supply terminal, the second end of the first single-pole double-throw switch S1 is grounded, and the third end of the first single-pole double-throw switch S1 is used to connect to the device under test. The first relay K1 is magnetically connected to the first single-pole double-throw switch S1.

[0081] The second driving circuit 52 includes: a fifth resistor R5, a sixth resistor R6, and a second switch Q2. The first ends of the fifth resistor R5 and the sixth resistor R6 are both connected to the output terminal of the second output side. The second end of the fifth resistor R5 is grounded. The controlled terminal of the second switch Q2 is connected to the second end of the sixth resistor R6. The output terminal of the second switch Q2 is grounded.

[0082] The second switching circuit 53 includes: a second light-emitting diode D4, a second diode D3, a seventh resistor R7, an eighth resistor R8, a second relay K2, and a second single-pole double-throw switch S2. The anode of the second light-emitting diode D4 is connected to the input terminal of the second output side, and the cathode of the second light-emitting diode D4 is connected to the first terminal of the seventh resistor R7. The cathode of the first diode D1 is used to connect to a second voltage. The anode of the second diode D3 is connected to the second terminal of the seventh resistor R7 and the input terminal of the second switch Q2. The first terminal of the second relay K2 is connected to the cathode of the second diode D3. The second terminal of the second relay K2 is connected to the second terminal of the eighth resistor R8. The first terminal of the eighth resistor R8 is connected to the input terminal of the second switch Q2. The first terminal of the second single-pole double-throw switch S2 is used to connect to the power supply terminal, the second terminal of the second single-pole double-throw switch S2 is grounded, and the third terminal of the second single-pole double-throw switch S2 is used to connect to the device under test. The second relay K2 is magnetically connected to the second single-pole double-throw switch S2.

[0083] In this embodiment, the first switch Q1 is a PMOS transistor, and the second switch Q2 is an NMOS transistor. When the main control module 30 sends a low-level signal to the output terminal of the first input-side circuit, the light-emitting diode in the first input-side circuit of the first optocoupler isolation circuit 41 turns on and emits a light signal. The light signal is received by the photosensitive receiver in the first output-side circuit and converted into a low-level signal. When the first switch Q1 receives the low-level signal, it opens the path between the second voltage and the first driving circuit 42, causing the first light-emitting diode D2 to light up, indicating that the user's input program code is correct. Under the action of the second voltage, the first relay K1 drives the first single-pole double-throw switch S1 to open the path between its first and third terminals, so that the path between the power supply terminal and the device under test is open, thereby driving the device under test to work.

[0084] When the main control module 30 sends a low-level signal to the output of the second input side circuit, the light-emitting diode in the second input side circuit of the second optocoupler isolation circuit 51 turns on and emits a light signal. The light signal is received by the photosensitive receiver in the second output side circuit and then turns on, causing the second switch Q2 to receive the second voltage. When the second switch Q2 receives the second voltage, it opens the path between the second voltage and the second drive circuit 52, causing the second light-emitting diode D4 to light up, indicating that the user-input program code is correct. Furthermore, under the action of the second voltage, the second relay K2 drives the second single-pole double-throw switch S2 to open, connecting its first and third terminals, thus connecting the power supply terminal to the device under test, thereby driving the device under test to operate.

[0085] In one embodiment of this utility model, reference is made to Figure 10 The experimental board 20 further includes:

[0086] The system comprises a first driving module 170, a second driving module 180, a third switch Q3, a fourth switch Q4, a fifth switch Q5, and a sixth switch Q6. The input terminals of the third switch Q3 and the fifth switch Q5 are both connected to a second voltage. The input terminal of the fourth switch Q4 is connected to the output terminal of the third switch Q3. The input terminal of the sixth switch Q6 is connected to the output terminal of the fifth switch Q5. The output terminals of the fourth switch Q4 and the sixth switch Q6 are both grounded.

[0087] The controlled terminals of the third switch Q3 and the fourth switch Q4 are both connected to the first drive circuit 42, the controlled terminals of the fifth switch Q5 and the sixth switch Q6 are both connected to the second drive circuit 52, and the first drive module 170 and the second drive module 180 are both connected to the main control module 30.

[0088] The embedded experimental platform also includes a motor, the first power supply terminal of which is connected to the output terminal of the third switch Q3, and the second power supply terminal of which is connected to the output terminal of the fifth switch Q5.

[0089] In this embodiment, the main control module 30 is used to generate a PWM control signal and send it to the first drive module 170 and the second drive module 180. The first drive module 170 and the second drive module 180 are used to boost the PWM control signal so that it is suitable for driving the switching transistor to work.

[0090] In this embodiment, an eleventh resistor R11 is connected in series between the controlled terminal of the third switch Q3 and the first drive module 170; a twelfth resistor R12 is connected in series between the controlled terminal of the fourth switch Q4 and the first drive module 170; a thirteenth resistor R13 is connected in series between the controlled terminal of the fifth switch Q5 and the second drive module 180; and a fourteenth resistor R14 is connected in series between the controlled terminal of the sixth switch Q6 and the first drive module 170. All of the above resistors are voltage limiting resistors to prevent the switch transistors from being damaged due to excessive voltage output by the drive module.

[0091] In this embodiment, the third switch Q3 and the fifth switch Q5 are used to regulate the motor speed, while the fourth switch Q4 and the sixth switch Q6 are used to control the motor direction. When the main control module 30 controls the third switch Q3 and the sixth switch Q6 to conduct, the first power supply terminal of the motor is connected to the second voltage, and the second power supply terminal is grounded. At this time, the current flows from the positive terminal of the power supply through the third switch Q3, the motor, and the sixth switch Q6 before returning to ground, thereby driving the motor to rotate forward. During this process, the main control module 30 controls the conduction time of the third switch Q3 by outputting a PWM signal, thereby adjusting the average current flowing through the motor and achieving precise control of the motor speed. At the same time, the main control module 30 also outputs another control signal to keep the sixth switch Q6 in a normally open state to ensure the stability of the current path and the normal operation of the motor. This design not only realizes the forward rotation function of the motor, but also provides flexible speed adjustment capability to meet diverse control needs.

[0092] When the main control module 30 controls the fourth switch Q4 and the fifth switch Q5 to conduct, the second power supply terminal of the motor is connected to the second voltage, and the first power supply terminal is grounded. At this time, the current flows from the positive terminal of the power supply through the fifth switch Q5, the motor, and the fourth switch Q4 before returning to ground, thereby driving the motor to reverse. During this process, the main control module 30 controls the conduction time of the fifth switch Q5 by outputting a PWM signal, thereby adjusting the average current flowing through the motor and achieving precise control of the motor speed. At the same time, the main control module 30 also outputs another control signal to keep the fourth switch Q4 in a normally open state to ensure the stability of the current path and the normal operation of the motor. This design not only realizes the motor reversal function but also provides flexible speed adjustment capability to meet diverse control needs.

[0093] By introducing the aforementioned circuit, this invention enables the embedded experimental platform to achieve functions such as forward and reverse rotation, speed regulation, and braking of the motor. Users can learn the working principle of the H-bridge circuit, basic motor control methods, and embedded programming and data processing techniques through experiments. This design not only closely aligns with real-world application scenarios but also provides users with ample practical opportunities, helping them better grasp the core knowledge of automotive electronics technology.

[0094] In one embodiment of this utility model, reference is made to Figure 4 The embedded experimental platform also includes:

[0095] An accelerator pedal 190 and a first Hall effect sensor 70 are provided. The first Hall effect sensor 70 is electrically connected to the accelerator pedal 190 and the main control module 30, respectively. The first Hall effect sensor is used to collect the voltage of the accelerator pedal and output a first detection signal.

[0096] The host computer 60 is used to output corresponding control signals to the experimental board 20 according to the program code input by the input device, so that the main control module 30 processes the first detection signal and outputs it to the host computer 60.

[0097] In this embodiment, the accelerator pedal 190 works in conjunction with the first Hall effect sensor 70 via a mechanical connection. The user changes the mechanical position of the pedal by pressing or releasing it. The movement of the pedal affects the magnetic field strength of the first Hall effect sensor 70 by changing the relative position of the magnet and the Hall element. Based on the change in magnetic field strength, the first Hall effect sensor 70 outputs a voltage signal (i.e., a first detection signal) that is linearly related to the position of the accelerator pedal 190. The main control module 30 determines the pressing depth of the accelerator pedal 190 based on the first detection signal and transmits the pressing depth parameter to the host computer 60. Upon receiving the pressing depth parameter, the host computer 60 displays it so that the user can understand the execution status of the program code they input.

[0098] It should be noted that the above process requires users to implement it according to their own program code. By introducing the accelerator pedal 190 and the first Hall sensor 70, the embedded experimental platform can simulate a real automotive throttle control system. Users can learn the working principle of Hall sensors, the design method of throttle control systems, and embedded programming and data processing techniques through experiments. This design not only closely resembles real-world application scenarios but also provides users with abundant practical opportunities, helping them better master the core knowledge of automotive electronics technology.

[0099] In addition, when the experimental board 20 also includes a first drive module 170, a second drive module 180, a third switch Q3, a fourth switch Q4, a fifth switch Q5, and a sixth switch Q6, and the embedded experimental platform also includes a motor, the main control module 30 is also used to generate corresponding PWM control signals based on the pressing depth of the accelerator pedal 190 to control the third switch Q3 / fifth switch Q5, thereby controlling the speed of the motor, which helps users understand the relationship between the accelerator pedal 190 and the motor speed.

[0100] In one embodiment of this utility model, reference is made to Figure 5 The embedded experimental platform also includes:

[0101] The brake pedal 80 and the second Hall sensor 90 are electrically connected to the brake pedal 80 and the main control module 30, respectively. The second Hall sensor 90 collects the pedal depth of the brake pedal 80 and outputs a corresponding second detection signal.

[0102] The host computer 60 is used to output corresponding control signals to the experimental board 20 according to the program code input by the input device, so that the main control module 30 processes the second detection signal and outputs it to the host computer 60.

[0103] In this embodiment, the brake pedal 80 works in conjunction with the second Hall effect sensor 90 via a mechanical connection. The user changes the mechanical position of the brake pedal 80 by pressing or releasing it. The movement of the pedal affects the magnetic field strength of the second Hall effect sensor 90 by changing the relative position of the magnet and the Hall element. Based on the change in magnetic field strength, the second Hall effect sensor 90 outputs a voltage signal (i.e., a second detection signal) that is linearly related to the position of the brake pedal 80. The main control module 30 determines the pedal depth based on the second detection signal and transmits the pedal depth parameter to the host computer 60. Upon receiving the pedal depth parameter, the host computer 60 displays it so that the user can understand the execution status of the program code they input.

[0104] It should be noted that the above process requires users to implement it according to their own program code. By introducing the brake pedal 80 and the second Hall sensor 90, the embedded experimental platform can simulate a real automotive braking control system. Users can learn the working principle of Hall sensors, the design methods of braking control systems, and embedded programming and data processing techniques through experiments. This design not only closely resembles real-world application scenarios but also provides users with abundant practical opportunities, helping them better master the core knowledge of automotive electronics technology.

[0105] In one embodiment of this utility model, reference is made to Figure 6 The experimental board 20 also includes a signal processing circuit 110, and the embedded experimental platform also includes a wheel 100. The wheel 100 is used to output a corresponding speed input signal when rotating. The signal processing circuit 110 is electrically connected to the wheel 100 and the main control module 30 respectively.

[0106] The host computer 60 is used to output corresponding control signals to the experimental board 20 according to the program code input by the input device, so that the main control module 30 controls the signal processing circuit 110 to process the speed input signal and output it to the host computer 60.

[0107] In this embodiment, the signal processing circuit 110 can amplify the rotation speed input signal using the amplification characteristics of a transistor, and can also shape it using the photoelectric conversion process of an optocoupler.

[0108] It should be noted that when the wheel 100 rotates, it outputs a speed input signal to the signal processing circuit 110. The signal processing circuit 110 amplifies and shapes the speed input signal before outputting it to the main control module 30. The main control module 30 determines the speed of the wheel 100 based on the processed signal from the signal processing circuit 110 and transmits the speed parameter of the wheel 100 to the host computer 60. After receiving the speed parameter, the host computer 60 displays it so that the user can understand the running status of the program code they input. Users can understand the importance of signal conditioning and master the basic methods of signal amplification and shaping through experiments.

[0109] In one embodiment of this utility model, reference is made to Figure 8 The embedded experimental platform also includes:

[0110] A temperature detection circuit 120 is electrically connected to the main control module 30. The host computer 60 is used to output corresponding control signals to the experimental board 20 according to the program code input by the input device. The temperature detection circuit 120 is used to detect the current room temperature and output corresponding temperature detection signals to the main control module 30. The main control module 30 is used to process the temperature detection signals and output them to the host computer 60.

[0111] In this embodiment, the main control module 30 determines the current room temperature based on the temperature detection signal and sends the temperature parameters to the host computer 60. The host computer 60 displays the received temperature parameters, allowing the user to analyze the program code's operation by observing the displayed temperature parameters. For example, if the temperature fails to reach the target value, it may be due to improper PID control parameter settings; or if the temperature fluctuates significantly, it may be due to an inadequate filtering algorithm.

[0112] In this embodiment, the temperature detection circuit 120 can be implemented in various ways, such as a thermistor, a digital temperature sensor, an analog temperature sensor, a thermocouple, or an integrated temperature chip.

[0113] In this embodiment, the user can write program code to control the main control module 30 to process the temperature detection signal, so that the main control module 30 can determine the current room temperature based on the temperature detection signal. This helps the user to understand the working principle of the temperature sensor and its application in embedded systems.

[0114] In one embodiment of this utility model, reference is made to Figure 7The experimental board 20 further includes a vehicle light driving circuit 130, and the embedded experimental platform further includes a vehicle light 140. The vehicle light driving circuit 130 is electrically connected to the main control module 30 and the vehicle light 140 respectively. The host computer 60 is used to output corresponding control signals to the experimental board 20 according to the program code input by the input device, so that the main control module 30 controls the vehicle light 140 driving module to drive the vehicle light 140 to light up.

[0115] In this embodiment, the headlight driving circuit 130 can be implemented using a P-channel MOSFET or a high-side driving circuit 40.

[0116] In this embodiment, the main control module 30 generates a corresponding PWM control signal to the headlight drive circuit 130 based on the input program code, so that the headlight drive circuit 130 controls the headlight 140 to turn on, off, or adjust its brightness according to the PWM control signal. Users can adjust the program code during the experiment to adjust the working state of the headlight 140. It should be noted that in new energy vehicles or traditional fuel vehicles, headlights 140 (such as headlights, taillights, turn signals, etc.) are important vehicle components. Through this experiment, students can simulate a real automotive lighting control system and learn how to use an embedded system to implement the switching, brightness adjustment, and dynamic effects of the headlight 140.

[0117] In one embodiment of this utility model, reference is made to Figure 9 The embedded experimental platform also includes a Hall current sensor 150, which detects the current of the circuit under test and outputs a corresponding current detection signal; the Hall current sensor 150 is electrically connected to the main control module 30; the host computer 60 is used to output a corresponding control signal to the experimental board 20 according to the program code input by the input device, so that the main control module can process the current detection signal.

[0118] In this embodiment, the user needs to input program code into the main control module 30 so that the main control module 30 processes the current detection signal based on the program code to determine the current of the circuit under test. The main control module 30 also sends the current parameters to the host computer 60, which displays the received current parameters for the user to analyze. Through the above experiment, the user can understand the working principle of the Hall current sensor 150 and its application in embedded systems.

[0119] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An embedded experimental platform, characterized in that, include: Equipment stand; The experimental board includes a main control module, a high-side driving circuit, a low-side driving circuit, and multiple wiring holes. The main control module is electrically connected to the controlled terminals of the high-side driving circuit and the low-side driving circuit, respectively. The output terminals of the high-side driving circuit and the low-side driving circuit are used to connect to the experimental device through the wiring holes. The host computer is electrically connected to the experimental board. The host computer is also used to connect to an input device. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module controls the high-side drive circuit and / or the low-side drive circuit to work. The experimental board and the host computer are both mounted on the equipment stand.

2. The embedded experimental platform as described in claim 1, characterized in that, The high-side driving circuit includes: The system comprises a first optocoupler isolation circuit, a first driving circuit, and a first switching circuit. The first optocoupler isolation circuit includes a first input-side circuit and a first output-side circuit. The input terminal of the first input-side circuit is connected to a first voltage, and the output terminal of the first input-side circuit is electrically connected to the main control module. The input terminal of the first driving circuit is connected to a second voltage. The controlled terminal of the first driving circuit is connected to the input terminal of the first output side circuit. The output terminal of the first output side circuit is grounded. The output terminal of the first driving circuit is connected to the controlled terminal of the first switching circuit. The input terminal of the first switching circuit is used to connect to the power supply terminal. The output terminal of the first switching circuit is used to connect to the device under test. The low-side driving circuit includes: The second optocoupler isolation circuit, the second driving circuit, and the second switching circuit are provided. The second optocoupler isolation circuit includes a second input side circuit and a second output side circuit. The input terminal of the second input side circuit is connected to a first voltage, and the output terminal of the second input side circuit is electrically connected to the main control module. The controlled terminal of the second driving circuit is connected to the output terminal of the second output side circuit. The input terminal of the second output side circuit is used to connect to the second voltage. The input terminal of the second driving circuit is connected to the controlled terminal of the second switching circuit. The output terminal of the second driving circuit is grounded. The input terminal of the second switching circuit is used to connect to the power supply terminal. The output terminal of the second switching circuit is used to connect to the device under test.

3. The embedded experimental platform as described in claim 2, characterized in that, The first driving circuit includes: a first resistor, a second resistor, and a first switching transistor. The first end of the first resistor and the first end of the second resistor are both connected to the input terminal of the first output side. The first end of the first resistor and the first end of the first switching transistor are both connected to a second voltage. The second end of the second resistor is connected to the controlled terminal of the first switching transistor. The first switching circuit includes: a first light-emitting diode (LED), a third resistor, a fourth resistor, a first diode, a first relay, and a first single-pole double-throw (SPDT) switch. The anode of the first LED, the cathode of the first LED, and the first terminal of the fourth resistor are all connected to the output terminal of the first switching transistor. The cathode of the first LED is connected to the first terminal of the third resistor. The second terminal of the third resistor and the anode of the first diode are both grounded. The second terminal of the fourth resistor is connected to the first terminal of the first relay, and the second terminal of the first relay is grounded. The first terminal of the first SPDT switch is used to connect to a power supply terminal, the second terminal of the first SPDT switch is grounded, and the third terminal of the first SPDT switch is used to connect to the device under test. The first relay is magnetically connected to the first SPDT switch. The second driving circuit includes: a fifth resistor, a sixth resistor, and a second switching transistor. The first ends of the fifth resistor and the sixth resistor are both connected to the output terminal of the second output side. The second end of the fifth resistor is grounded. The controlled terminal of the second switching transistor is connected to the second end of the sixth resistor. The output terminal of the second switching transistor is grounded. The second switching circuit includes: a second light-emitting diode (LED), a second diode, a seventh resistor, an eighth resistor, a second relay, and a second single-pole double-throw (SPDT) switch. The anode of the second LED is connected to the input terminal of the second output side, and the cathode of the second LED is connected to the first terminal of the seventh resistor. The cathode of the first diode is used to connect to a second voltage. The anode of the second diode is connected to the second terminal of the seventh resistor and the input terminal of the second switch, respectively. The first terminal of the second relay is connected to the cathode of the second diode, and the second terminal of the second relay is connected to the second terminal of the eighth resistor. The first terminal of the eighth resistor is connected to the input terminal of the second switch. The first terminal of the second SPDT switch is used to connect to a power supply terminal, and the second terminal of the second SPDT switch is grounded. The third terminal of the second SPDT switch is used to connect to the device under test. The second relay is magnetically connected to the second SPDT switch.

4. The embedded experimental platform as described in claim 2, characterized in that, The experimental board also includes: The system comprises a first driving module, a second driving module, a third switching transistor, a fourth switching transistor, a fifth switching transistor, and a sixth switching transistor. The input terminals of the third and fifth switching transistors are both connected to a second voltage. The input terminal of the fourth switching transistor is connected to the output terminal of the third switching transistor. The input terminal of the sixth switching transistor is connected to the output terminal of the fifth switching transistor. The output terminals of the fourth and sixth switching transistors are both grounded. The controlled terminals of the third and fourth switching transistors are both connected to the first driving circuit, the controlled terminals of the fifth and sixth switching transistors are both connected to the second driving circuit, and the first driving module and the second driving module are both connected to the main control module. The embedded experimental platform also includes a motor, the first power supply terminal of which is connected to the output terminal of the third switching transistor, and the second power supply terminal of which is connected to the output terminal of the fifth switching transistor.

5. The embedded experimental platform as described in claim 1 or 4, characterized in that, The embedded experimental platform also includes: An accelerator pedal and a first Hall effect sensor are included. The first Hall effect sensor is electrically connected to the accelerator pedal and the main control module, respectively. The first Hall effect sensor is used to collect the pressing depth of the accelerator pedal and output a first detection signal. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module processes the first detection signal and outputs it to the host computer.

6. The embedded experimental platform as described in claim 1 or 4, characterized in that, The embedded experimental platform also includes: The system includes a brake pedal and a second Hall effect sensor. The second Hall effect sensor is electrically connected to both the brake pedal and the main control module. The second Hall effect sensor is used to collect the pedal depth and output a corresponding second detection signal. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module processes the second detection signal and outputs it to the host computer.

7. The embedded experimental platform as described in claim 1 or 4, characterized in that, The experimental board also includes a signal processing circuit, and the embedded experimental platform also includes a wheel. The wheel is used to output a corresponding rotation speed input signal when rotating. The signal processing circuit is electrically connected to the wheel and the main control module respectively. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module controls the signal processing circuit to process the speed input signal and output it to the host computer.

8. The embedded experimental platform as described in claim 1, characterized in that, The embedded experimental platform also includes: A temperature detection circuit is electrically connected to the main control module; the host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device; the temperature detection circuit is used to detect the current room temperature and output corresponding temperature detection signals to the main control module; the main control module is used to process the temperature detection signals and output them to the host computer.

9. The embedded experimental platform as described in claim 1, characterized in that, The experimental board also includes a vehicle light driving circuit, and the embedded experimental platform also includes a vehicle light. The vehicle light driving circuit is electrically connected to the main control module and the vehicle light respectively. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module controls the vehicle light driving circuit to drive the vehicle light to light up.

10. The embedded experimental platform as described in claim 1, characterized in that, The embedded experimental platform also includes a Hall current sensor, which detects the current of the circuit under test and outputs a corresponding current detection signal; the Hall current sensor is electrically connected to the main control module. The host computer is used to output corresponding control signals to the experimental board according to the program code input by the input device, so that the main control module can process the current detection signal.

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