Driving control circuit of electric toy car

Abstract

The invention discloses an electric toy car driving control circuit which comprises a second resistor, a third resistor, a fourth resistor, a first operational amplifier, a second operational amplifier, a first connector, a second connector and a first potentiometer. The output end of the first operational amplifier is connected with the other end of the first potentiometer and one end of the third resistor, and the other end of the third resistor is connected with one end of the fourth resistor and the inverting end of the second operational amplifier. The output end of the second operational amplifier is connected with the other end of the fourth resistor and the second connector, and the in-phase end of the first operational amplifier and the in-phase end of the second operational amplifier are connected with the grounding end.

Description

Technical Field

[0001] The present invention relates to the technical field of electric toys, and in particular to a driving control circuit for an electric toy car. Background Art

[0002] Electric toy cars not only help children develop their sense of control, directional judgment, and ability to react to obstacles, but also help them understand and adapt to modern transportation early on. This type of electric car training enriches children's lives. However, existing toy cars cannot control their speed, and their load capacity varies depending on the number of people riding. This results in excessive speed limits at the factory, resulting in a poor user experience, while unrestricted speeds can create safety risks. Summary of the Invention

[0003] In response to the above technical problems, the object of the present invention is to provide an electric toy car drive control circuit, comprising a second resistor R2, a third resistor R3, a fourth resistor R4, a first operational amplifier U1, a second operational amplifier U2, a first connector P1, a second connector P2, and a first potentiometer RV1, wherein one end of the second resistor R2 is connected to the first connector P1, the other end of the second resistor R2 is connected to the inverting end of the first operational amplifier U1, one end of the first potentiometer RV1, and the tap end of the first potentiometer RV1, the output end of the first operational amplifier U1 is connected to the other end of the first potentiometer RV1 and one end of the third resistor R3, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the inverting end of the second operational amplifier U2, the output end of the second operational amplifier U2 is connected to the other end of the fourth resistor R4 and the second connector P2, and the non-inverting end of the first operational amplifier U1, the non-inverting end of the second operational amplifier U2 and the ground end are connected.

[0004] Furthermore, it also includes a first resistor R1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a sixteenth resistor R16, a third digital potentiometer U3, a fourth operational amplifier U4, a fifth operational amplifier U5, a sixth operational amplifier U6, a seventh trigger U7, an eighth AND gate U8, a first transistor Q1, a second MOS tube Q2, a first diode D1, a third connector P3, a fourth connector P4, a first relay RL1, a drain of the second MOS tube Q2, a first pin of the third digital potentiometer U3, a first pin of the seventh trigger U7 The first pin, one end of the seventh resistor R7, one end of the sixteenth resistor R16 are connected to the power supply, one end of the first relay RL1 is connected to the fourth connector P4, the other end of the first relay RL1 is connected to the output end of the sixth operational amplifier U6, one end of the tenth resistor R10, and one end of the eleventh resistor R11, the inverting end of the sixth operational amplifier U6 is connected to the other end of the tenth resistor R10, the non-inverting end of the sixth operational amplifier U6 is connected to one end of the fifth resistor R5, one end of the ninth resistor R9, the other end of the fifth resistor R5 is connected to the second connector P2, the other end of the ninth resistor R9 is connected to the other end of the seventh resistor R7, the third pin of the third digital potentiometer U3, the fifth pin of the third digital potentiometer U3, and the inverting end of the fifth operational amplifier U5, and the fifth operational amplifier U5 are connected. The non-inverting end of U5 is connected to the output end of the fourth operational amplifier U4 and one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to one end of the first resistor R1 and the inverting end of the fourth operational amplifier U4. The non-inverting end of the fourth operational amplifier U4 is connected to the third connector P3. The output end of the fifth operational amplifier U5 is connected to the second pin of the third digital potentiometer U3, the third pin of the seventh trigger U7, and one end of the eighth resistor R8. The seventh pin of the third digital potentiometer U3 is connected to the fifth pin of the seventh trigger U7, the first connection end of the eighth AND gate U8, and one end of the twelfth resistor R12. The second connection end of the eighth AND gate U8 is connected to the source of the second MOS tube Q2 and one end of the thirteenth resistor R13. The output end of the eighth AND gate U8 is connected to the coil of the first relay RL1. The first end of the first relay RL1 is connected to the ground, the second pin of the seventh trigger U7, the sixth pin of the seventh trigger U7 and the anode of the first diode D1 are connected, the cathode of the first diode D1 and the fourth pin of the seventh trigger U7 and one end of the fourteenth resistor R14 are connected, the gate of the second MOS tube Q2 and the emitter of the first transistor Q1 are connected, the collector of the first transistor Q1 and the other end of the sixteenth resistor R16 are connected, the base of the first transistor Q1 and the first connector P1 are connected, the other end of the coil of the first relay RL1, the sixth pin of the third digital potentiometer U3, the other end of the first resistor R1, the other end of the eighth resistor R8, the other end of the eleventh resistor R11, the other end of the twelfth resistor R12, the other end of the thirteenth resistor R13, the other end of the fourteenth resistor R14 and the ground are connected.

[0005] Furthermore, it also includes a second diode D2, a third diode D3, and a fifth connector P5, the anode of the second diode D2, the anode of the third diode D3 and the fifth connector P5 are connected, the cathode of the second diode D2 is connected to the third pin of the seventh trigger U7, and the cathode of the third diode D3 is connected to the fourth pin of the seventh trigger U7.

[0006] Furthermore, a seventeenth resistor R17 is included. One end of the seventeenth resistor R17 is connected to the emitter of the first transistor Q1, and the other end of the seventeenth resistor R17 is connected to the ground.

[0007] Furthermore, it includes a fifth light emitting diode D5, wherein the anode of the fifth light emitting diode D5 is connected to the output end of the eighth AND gate U8, and the cathode of the fifth light emitting diode D5 is connected to the ground end.

[0008] Furthermore, a fourth light emitting diode D4 is included, wherein the anode of the fourth light emitting diode D4 is connected to the first connection end of the eighth AND gate U8, and the cathode of the fourth light emitting diode D4 is connected to the ground end.

[0009] Furthermore, the device further includes a first switch SW1 , one end of which is connected to the power supply, and the other end of which is connected to the fifth connector P5 .

[0010] The beneficial effects of the present invention compared with the prior art are: The present invention can limit and adjust the vehicle speed to avoid potential safety hazards. It can adjust the deviation of the actual driving speed according to the vehicle load, and avoid the compensation changes caused by bumps during driving and a series of control problems caused by compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction is given below to the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a structural diagram of the drive control circuit provided by the present invention. DETAILED DESCRIPTION

[0013] In order to make the objects and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the embodiments. It should be understood that the following text is only used to describe one or several specific implementation methods of the present invention and does not strictly limit the scope of protection specifically requested by the present invention.

[0014] The present invention discloses a drive control circuit for an electric toy car, comprising a second resistor R2, a third resistor R3, a fourth resistor R4, a first operational amplifier U1, a second operational amplifier U2, a first connector P1, a second connector P2, and a first potentiometer RV1, wherein one end of the second resistor R2 is connected to the first connector P1, the other end of the second resistor R2 is connected to an inverting end of the first operational amplifier U1, one end of the first potentiometer RV1, and a tap end of the first potentiometer RV1, the output end of the first operational amplifier U1 is connected to the other end of the first potentiometer RV1 and one end of the third resistor R3, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the inverting end of the second operational amplifier U2, the output end of the second operational amplifier U2 is connected to the other end of the fourth resistor R4 and the second connector P2, and the non-inverting end of the first operational amplifier U1, the non-inverting end of the second operational amplifier U2, and the ground end are connected.

[0015] Specifically, it also includes a first resistor R1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a sixteenth resistor R16, a third digital potentiometer U3, a fourth operational amplifier U4, a fifth operational amplifier U5, a sixth operational amplifier U6, a seventh trigger U7, an eighth AND gate U8, a first transistor Q1, a second MOS transistor Q2, a first diode D1, a third connector P3, a fourth connector P4, a first relay RL1, a drain of the second MOS transistor Q2, a first pin of the third digital potentiometer U3, and a first pin of the seventh trigger U7. , one end of the seventh resistor R7, one end of the sixteenth resistor R16 are connected to the power supply, one end of the first relay RL1 is connected to the fourth connector P4, the other end of the first relay RL1 is connected to the output end of the sixth operational amplifier U6, one end of the tenth resistor R10, and one end of the eleventh resistor R11, the inverting end of the sixth operational amplifier U6 is connected to the other end of the tenth resistor R10, the non-inverting end of the sixth operational amplifier U6 is connected to one end of the fifth resistor R5, one end of the ninth resistor R9, the other end of the fifth resistor R5 is connected to the second connector P2, the other end of the ninth resistor R9 is connected to the other end of the seventh resistor R7, the third pin of the third digital potentiometer U3, the fifth pin of the third digital potentiometer U3, and the inverting end of the fifth operational amplifier U5, and the fifth operational amplifier U The non-inverting end of the fifth operational amplifier U5 is connected to the output end of the fourth operational amplifier U4 and one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to one end of the first resistor R1 and the inverting end of the fourth operational amplifier U4. The non-inverting end of the fourth operational amplifier U4 is connected to the third connector P3. The output end of the fifth operational amplifier U5 is connected to the second pin of the third digital potentiometer U3, the third pin of the seventh trigger U7, and one end of the eighth resistor R8. The seventh pin of the third digital potentiometer U3 is connected to the fifth pin of the seventh trigger U7, the first connection end of the eighth AND gate U8, and one end of the twelfth resistor R12. The second connection end of the eighth AND gate U8 is connected to the source of the second MOS tube Q2 and one end of the thirteenth resistor R13. The output end of the eighth AND gate U8 is connected to one end of the coil of the first relay RL1. The second pin of the seventh trigger U7, the sixth pin of the seventh trigger U7 and the anode of the first diode D1 are connected, the cathode of the first diode D1 and the fourth pin of the seventh trigger U7 and one end of the fourteenth resistor R14 are connected, the gate of the second MOS tube Q2 and the emitter of the first transistor Q1 are connected, the collector of the first transistor Q1 and the other end of the sixteenth resistor R16 are connected, the base of the first transistor Q1 and the first connector P1 are connected, the other end of the coil of the first relay RL1, the sixth pin of the third digital potentiometer U3, the other end of the first resistor R1, the other end of the eighth resistor R8, the other end of the eleventh resistor R11, the other end of the twelfth resistor R12, the other end of the thirteenth resistor R13, the other end of the fourteenth resistor R14 and the ground are connected.

[0016] Specifically, it also includes a second diode D2, a third diode D3, and a fifth connector P5. The anode of the second diode D2, the anode of the third diode D3 and the fifth connector P5 are connected, the cathode of the second diode D2 and the third pin of the seventh trigger U7 are connected, and the cathode of the third diode D3 and the fourth pin of the seventh trigger U7 are connected.

[0017] Specifically, a seventeenth resistor R17 is further included. One end of the seventeenth resistor R17 is connected to the emitter of the first transistor Q1 , and the other end of the seventeenth resistor R17 is connected to the ground.

[0018] Specifically, a fifth light emitting diode D5 is further included, wherein the anode of the fifth light emitting diode D5 is connected to the output end of the eighth AND gate U8, and the cathode of the fifth light emitting diode D5 is connected to the ground end.

[0019] Specifically, a fourth light emitting diode D4 is further included, wherein the anode of the fourth light emitting diode D4 is connected to the first connection end of the eighth AND gate U8, and the cathode of the fourth light emitting diode D4 is connected to the ground end.

[0020] Specifically, it further includes a first switch SW1 , one end of the first switch SW1 is connected to the power supply, and the other end of the first switch SW1 is connected to the fifth connector P5 .

[0021] In the first embodiment, the first connector P1 is used to input a drive signal, the first potentiometer RV1 is used for speed limit adjustment, and the second connector P2 outputs an actual drive signal. The signal of the first connector P1 is input to the inverting terminal of the first operational amplifier U1 through the second resistor R2. The resistance ratio of the first potentiometer RV1 and the second resistor R2 is adjusted to control the maximum multiple range of the output of the first operational amplifier U1. The resistance value of the second resistor R2 is rounded, and the first potentiometer RV1 is a multiple. The output signal of the first operational amplifier U1 is input to the inverting terminal of the second operational amplifier U2 through the third resistor R3. The output signal of the second operational amplifier U2 is inverted through the fourth resistor R4 and the inverting terminal of the second operational amplifier U2 and then input to the second connector P2. The second connector P2 outputs the actual drive signal to the motor drive amplifier circuit with a constant drive current to complete speed limit and adjustment.

[0022] Taking into account the speed limit deviation compensation caused by different loads, and the series of control problems that arise after compensation, in this embodiment, the actual drive signal originally output by the second connector P2 is changed to the output of the fourth connector P4, the output of the second operational amplifier U2 is input to the non-inverting terminal of the sixth operational amplifier U6 through the fifth resistor R5, and the weight signal is input to the third connector P3. The output of the fourth operational amplifier U4 passes through the sixth resistor R6 and the first resistor R1 loop, and the voltage at the end of the sixth resistor R6 is fed back to the inverting terminal of the fourth operational amplifier U4. The drive signal at the output end of the fourth operational amplifier U4 is then input to the non-inverting terminal of the fifth operational amplifier U5, and the sampling pair of the inverting terminal of the fifth operational amplifier U5 is obtained. In response to the voltage at the connection terminal of the seventh resistor R7 and the third pin of the third digital potentiometer U3, the output terminal signal of the fifth operational amplifier U5 is fed back to the second pin of the third digital potentiometer U3. The third digital potentiometer U3 is adjusted upward to pull up the terminal voltage of the seventh resistor R7 and then fed back to the non-inverting terminal of the sixth operational amplifier U6 through the ninth resistor R9. The sixth operational amplifier U6 superimposes the terminal voltage of the ninth resistor R9 and the terminal voltage of the fifth resistor R5 and outputs it. At the same time, the fifth operational amplifier U5 outputs a signal to the third pin of the seventh trigger U7. The sixth pin of the seventh trigger U7 is cut off, and the fourth pin is pulled down through the fourteenth resistor R14. The fifth pin of the seventh trigger U7 outputs a signal to the third digital potentiometer U3. The seventh pin of the digital potentiometer U3 and the first pin of the eighth AND gate U8, the third digital potentiometer U3 is cut off, and the adjustment of the fifth operational amplifier U5 is stopped. This is to prevent the actual output drive signal from changing with the compensation signal when the weight changes after the vehicle is bumped during driving. When the first connector P1 inputs a signal, it is input to the gate of the second MOS tube Q2 through the base of the first transistor Q1. The second MOS tube Q2 is turned on, and the power supply is input to the eighth AND gate U8 through the second MOS tube Q2. The eighth AND gate U8 outputs to the coil of the first relay RL1. The first Relay RL1 is closed and then outputs the actual drive signal through the fourth connector P4. This prevents the compensation signal fed back from the seventh resistor R7 from causing the sixth operational amplifier U6 to directly output the drive signal when the vehicle drive signal is not input from the first connector P1, that is, when the pedal is not depressed. The series connection of the first transistor Q1 eliminates the conduction voltage difference of the second MOS transistor Q2, preventing the second MOS transistor Q2 from being cut off when the drive signal is low. The sixteenth resistor R16 is used for current limiting, and the seventeenth resistor R17 is used to increase the response speed of the second MOS transistor Q2. The fourth light-emitting diode D4 is used to indicate the current pedal usage status, and the fifth light-emitting diode D5 indicates the current pedal usability status.

[0023] Considering the compensation reset when personnel are replaced, the fifth connector P5 is used to input the vehicle power-off signal, and the first switch SW1 is used to update the weight compensation when personnel are replaced. During the update, the input signal of the first connector P1 will not cause the vehicle to move. When the power-off signal and the first switch SW1 are closed, the signal is input to the fourth pin of the seventh trigger U7 through the third diode D3 in one path, and is input to the third pin of the seventh trigger U7 through the second diode D2 in the other path. The fifth pin of the seventh trigger U7 is cut off, and the output of the fifth operational amplifier U5 is adjusted again by the third digital potentiometer U3 to complete the update.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An electric toy car drive control circuit, characterized in that: The invention comprises a second resistor, a third resistor, a fourth resistor, a first operational amplifier, a second operational amplifier, a first connector, a second connector, and a first potentiometer, wherein one end of the second resistor is connected to the first connector, the other end of the second resistor is connected to the inverting end of the first operational amplifier, one end of the first potentiometer, and the tap end of the first potentiometer, the output end of the first operational amplifier is connected to the other end of the first potentiometer and one end of the third resistor, the other end of the third resistor is connected to one end of the fourth resistor and the inverting end of the second operational amplifier, the output end of the second operational amplifier is connected to the other end of the fourth resistor and the second connector, and the non-inverting end of the first operational amplifier, the non-inverting end of the second operational amplifier, and the ground end are connected.

2. The electric toy car drive control circuit according to claim 1, characterized in that: The device further includes a first resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a sixteenth resistor, a third digital potentiometer, a fourth operational amplifier, a fifth operational amplifier, a sixth operational amplifier, a seventh trigger, an eighth AND gate, a first transistor, a second MOS transistor, a first diode, a third connector, a fourth connector, and a first relay. The drain of the second MOS transistor, the first pin of the third digital potentiometer, the first pin of the seventh trigger, one end of the seventh resistor, and one end of the sixteenth resistor are connected to the power supply. One end of the first relay is connected to the fourth connector. The other end of the first relay is connected to the output end of the sixth operational amplifier, one end of the tenth resistor, and one end of the eleventh resistor. The inverting end of the sixth operational amplifier is connected to the other end of the tenth resistor. The non-inverting end of the sixth operational amplifier is connected to one end of the fifth resistor and one end of the ninth resistor. The other end of the fifth resistor is connected to the second connector. The other end of the ninth resistor is connected to the other end of the seventh resistor, the third pin of the third digital potentiometer, the fifth pin of the third digital potentiometer, and the inverting end of the fifth operational amplifier are connected. The non-inverting end of the fifth operational amplifier is connected to the fourth operational amplifier. The output end of the fifth operational amplifier is connected to the second pin of the third digital potentiometer, the third pin of the seventh trigger, and one end of the eighth resistor. The seventh pin of the third digital potentiometer is connected to the fifth pin of the seventh trigger, the first connection end of the eighth AND gate, and one end of the twelfth resistor. The second connection end of the eighth AND gate is connected to the source of the second MOS transistor and one end of the thirteenth resistor. The output end of the eighth AND gate is connected to one end of the first relay coil. The second pin of the seventh trigger, the sixth pin of the seventh trigger, and the anode of the first diode are connected. The cathode of the first diode is connected to the fourth pin of the seventh trigger and one end of the fourteenth resistor. The gate of the second MOS transistor is connected to the emitter of the first transistor. The collector of the first transistor is connected to the other end of the sixteenth resistor. The base of the first transistor is connected to the first connector. The other end of the first relay coil, the sixth pin of the third digital potentiometer, the other end of the first resistor, the other end of the eighth resistor, the other end of the eleventh resistor, the other end of the twelfth resistor, the other end of the thirteenth resistor, the other end of the fourteenth resistor, and ground are connected.

3. The electric toy car drive control circuit according to claim 2, characterized in that: It also includes a second diode, a third diode, and a fifth connector. The anode of the second diode, the anode of the third diode and the fifth connector are connected. The cathode of the second diode is connected to the third pin of the seventh trigger. The cathode of the third diode is connected to the fourth pin of the seventh trigger.

4. The electric toy car drive control circuit according to claim 2, characterized in that: It also includes a seventeenth resistor, one end of the seventeenth resistor is connected to the emitter of the first transistor, and the other end of the seventeenth resistor is connected to the ground end.

5. The electric toy car drive control circuit according to claim 2, characterized in that: It also includes a fifth light emitting diode, wherein the anode of the fifth light emitting diode is connected to the output terminal of the eighth AND gate, and the cathode of the fifth light emitting diode is connected to the ground terminal.

6. The electric toy car drive control circuit according to claim 2, characterized in that: It also includes a fourth light emitting diode, wherein the anode of the fourth light emitting diode is connected to the first connection end of the eighth AND gate, and the cathode of the fourth light emitting diode is connected to the ground end.

7. The electric toy car drive control circuit according to claim 3, characterized in that: The device further includes a first switch, one end of which is connected to the power supply, and the other end of which is connected to the fifth connector.

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