A positioning circuit for C3200 camera

Abstract

The present invention belongs to the technical field of industrial cameras, and particularly relates to a positioning circuit for a C3200 camera. The circuit comprises a first infrared sensing module, a second infrared sensing module, a third infrared sensing module, a main controller, and a motor control chip. The first infrared sensing module, the second infrared sensing module, and the third infrared sensing module are each provided with a first input end and a first output end. The main controller is provided with multiple second input ends and multiple second output ends. The first input end is connected to the multiple second output ends, and the first output end is connected to the multiple second input ends. The main controller is also provided with a first motor input end and a second motor input end. The motor control chip is provided with a first motor output end and a second motor output end. The provision of the first infrared sensing module, the second infrared sensing module, the third infrared sensing module, the main controller, and the motor control chip facilitates improving the control accuracy of electronic positioning.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial cameras, and in particular relates to a positioning circuit for a C3200 camera. Background Art

[0002] Industrial cameras, also commonly known as video cameras, have higher image stability, higher transmission capabilities, and higher anti-interference capabilities compared to traditional civilian cameras (video cameras). Most industrial cameras on the market are based on CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) chips.

[0003] Most existing industrial cameras use electronic positioning technology. Electronic positioning: When the motor drives the wheel to rotate (the rest of the wheel is black, and the position corresponding to the wheel positioning point is a through hole), the circuit board is positioned through three infrared sensors. When the light emitted by the infrared sensor reaches the through hole position on the wheel, the through hole position will reflect the light, and the remaining black positions will absorb the light. The feedback signal to the circuit board changes, and the circuit board controls the stepper motor to stop rotating and reach the specified position. Existing electronic positioning devices have the problem of inaccurate control. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the present invention provides a positioning circuit for a C3200 camera with precise control.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] A positioning circuit for a C3200 camera includes a first infrared sensing module, a second infrared sensing module, a third infrared sensing module, a main controller, and a motor control chip. The first infrared sensing module, the second infrared sensing module, and the third infrared sensing module are each provided with a first input terminal and a first output terminal. The main controller is provided with three second input terminals and three second output terminals. Each first input terminal is connected to a corresponding second input terminal.

[0009] The main controller is further provided with a first motor input terminal and a second motor input terminal, the motor control chip is provided with a first motor output terminal and a second motor output terminal, the first motor input terminal is connected to the first motor output terminal, and the second motor input terminal is connected to the second motor output terminal, and the first infrared sensing module, the second infrared sensing module and the third infrared sensing module are each provided with a first test point, a first resistor, a second resistor, a first capacitor, a first power supply, a first MOS tube, a third resistor, a fourth resistor, a first magnetic bead, a second capacitor, a first sensor, a fifth resistor, a sixth resistor, a seventh resistor and a third capacitor;

[0010] One end of the first resistor and one end of the first test point are both connected to the first input end, one end of the second resistor and the gate of the first MOS transistor are both connected to the other end of the first resistor, the other end of the second resistor and the source of the first MOS transistor are both connected to one end of the first capacitor, the other end of the first capacitor is grounded, the first power supply is respectively connected to one end of the first capacitor, the other end of the second resistor, and the source of the first MOS transistor, one end of the third resistor, one end of the fourth resistor, and one end of the first magnetic bead are all connected to the drain of the first MOS transistor, the other end of the first magnetic bead is connected to the first power supply, the other end of the third resistor and the other end of the fourth resistor are connected to one end of the second capacitor, the other end of the second capacitor is grounded, the AN pin on the first sensor is connected to the other end of the fourth resistor, and one end of the fifth resistor and one end of the sixth resistor are connected to the first power supply, and The first sensor is connected to one end of the third capacitor, the other end of the fifth resistor and the other end of the sixth resistor are connected to one end of the seventh resistor, the other end of the third capacitor and the other end of the seventh resistor are grounded, the CO pin of the first sensor is connected to the other end of the sixth resistor, the three second output ends include a fifteenth pin, a fourteenth pin and a sixteenth pin, the three second input ends include a thirteenth pin, a twelfth pin and a seventeenth pin, the fifteenth pin is connected to the first input end of the first infrared sensing module, the fourteenth pin is connected to the first input end of the second infrared sensing module, the sixteenth pin is connected to the first input end of the third infrared sensing module, the thirteenth pin is connected to the first output end of the first infrared sensing module, the twelfth pin is connected to the first output end of the second infrared sensing module, and the seventeenth pin is connected to the first output end of the third infrared sensing module.

[0011] The above-mentioned positioning circuit for the C3200 camera also includes a stepper motor. The first motor input terminal on the main controller is the tenth pin, the second motor input terminal on the main controller is the forty-fifth pin, the first motor output terminal on the motor control chip is the nineteenth pin, and the second motor output terminal on the motor control chip is the third pin. The tenth pin is connected to the nineteenth pin, and the third pin is connected to the forty-fifth pin. The motor control chip is also provided with a fourth pin, an eleventh pin, an eighteenth pin and a twenty-fifth pin, and the fourth pin, the eleventh pin, the eighteenth pin and the twenty-fifth pin are all connected to the stepper motor.

[0012] The positioning circuit for the C3200 camera further includes a buzzer circuit module. The main controller is provided with a twenty-ninth pin, and the buzzer circuit module is connected to the twenty-ninth pin.

[0013] The positioning circuit for the C3200 camera further includes a thermistor. The main controller is also provided with an eleventh pin of the main controller, and the thermistor is connected to the eleventh pin of the main controller.

[0014] In the above-mentioned positioning circuit for C3200 camera, the main controller adopts STM32F103CBT6 chip.

[0015] In the positioning circuit for the C3200 camera, the motor control chip adopts the A3980 chip.

[0016] In the above-mentioned positioning circuit for the C3200 camera, the first sensor is an infrared sensor SFH9201.

[0017] In the above-mentioned positioning circuit for the C3200 camera, the first MOS tube is SI2333 type.

[0018] (3) Beneficial effects

[0019] The beneficial effect of the present invention is that the control accuracy of electronic positioning is improved by arranging the first infrared sensing module, the second infrared sensing module, the third infrared sensing module, the main controller and the motor control chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a first infrared sensing module of a positioning circuit for a C3200 camera according to the present invention;

[0021] Figure 2 This is a schematic structural diagram of a second infrared sensing module used in a positioning circuit of a C3200 camera according to the present invention;

[0022] Figure 3 Schematic diagram of the structure of the third infrared sensing module of the positioning circuit for a C3200 camera according to the present invention;

[0023] Figure 4 This is a schematic structural diagram of a main controller of a positioning circuit for a C3200 camera according to the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the motor control chip used in the positioning circuit of the C3200 camera of the present invention;

[0025] Figure 6 This is a schematic structural diagram of a buzzer circuit module used in a positioning circuit of a C3200 camera according to the present invention;

[0026] Figure 7 Schematic diagram of the circuit structure of the thermistor used in the positioning circuit of the C3200 camera of the present invention;

[0027] Figure 8 The figure is a schematic diagram of the circuit structure of the fan of the positioning circuit for the C3200 camera according to the present invention.

[0028] [Description of Reference Numerals]

[0029] 1: The first infrared sensing module;

[0030] 2: Second infrared sensing module;

[0031] 3: The third infrared sensing module;

[0032] 4: Main controller;

[0033] 5: Motor control chip;

[0034] 6: First input terminal;

[0035] 7: First output terminal;

[0036] 8: three second input terminals;

[0037] 9: three second output terminals;

[0038] 10: First motor input terminal;

[0039] 11: Second motor input terminal;

[0040] 12: First motor output terminal;

[0041] 13: Second motor output terminal;

[0042] 14: First test point;

[0043] 15: first resistor;

[0044] 16: Second resistor;

[0045] 17: first capacitor;

[0046] 18: First power supply;

[0047] 19: First MOS tube;

[0048] 20: The third resistor;

[0049] 21: the fourth resistor;

[0050] 22: first magnetic bead;

[0051] 23: Second capacitor;

[0052] 24: First sensor;

[0053] 25: fifth resistor;

[0054] 26: sixth resistor;

[0055] 27: seventh resistor;

[0056] 28: The third capacitor;

[0057] 29: 15th pin;

[0058] 30: 14th pin;

[0059] 31: 16th pin;

[0060] 32: 13th pin;

[0061] 33: 12th pin;

[0062] 34: 17th pin;

[0063] 35: Tenth pin;

[0064] 36: 45th pin;

[0065] 37: 19th pin;

[0066] 38: The third pin;

[0067] 39: fourth pin;

[0068] 40: 11th pin;

[0069] 41: 18th pin;

[0070] 42: 25th pin;

[0071] 43: Buzzer circuit module;

[0072] 44: 29th pin;

[0073] 45: thermistor;

[0074] 46: Pin 11 of the main controller;

[0075] 47: Fan circuit. DETAILED DESCRIPTION

[0076] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0077] The key concept of the present invention is to provide a first infrared sensing module, a second infrared sensing module, a third infrared sensing module, a main controller and a motor control chip.

[0078] Please refer to Figures 1 to 8 As shown, a positioning circuit for a C3200 camera,

[0079] The invention comprises a first infrared sensing module, a second infrared sensing module, a third infrared sensing module, a main controller and a motor control chip. The first infrared sensing module, the second infrared sensing module and the third infrared sensing module are each provided with a first input terminal and a first output terminal. The main controller is provided with three second input terminals and three second output terminals. Each first input terminal is connected to a corresponding second input terminal.

[0080] The main controller is further provided with a first motor input terminal and a second motor input terminal, the motor control chip is provided with a first motor output terminal and a second motor output terminal, the first motor input terminal is connected to the first motor output terminal, and the second motor input terminal is connected to the second motor output terminal, and the first infrared sensing module, the second infrared sensing module and the third infrared sensing module are each provided with a first test point, a first resistor, a second resistor, a first capacitor, a first power supply, a first MOS tube, a third resistor, a fourth resistor, a first magnetic bead, a second capacitor, a first sensor, a fifth resistor, a sixth resistor, a seventh resistor and a third capacitor;

[0081] One end of the first resistor and one end of the first test point are both connected to the first input end, one end of the second resistor and the gate of the first MOS transistor are both connected to the other end of the first resistor, the other end of the second resistor and the source of the first MOS transistor are both connected to one end of the first capacitor, the other end of the first capacitor is grounded, the first power supply is respectively connected to one end of the first capacitor, the other end of the second resistor, and the source of the first MOS transistor, one end of the third resistor, one end of the fourth resistor, and one end of the first magnetic bead are all connected to the drain of the first MOS transistor, the other end of the first magnetic bead is connected to the first power supply, the other end of the third resistor and the other end of the fourth resistor are connected to one end of the second capacitor, the other end of the second capacitor is grounded, the AN pin on the first sensor is connected to the other end of the fourth resistor, and one end of the fifth resistor and one end of the sixth resistor are connected to the first power supply, and The first sensor is connected to one end of the third capacitor, the other end of the fifth resistor and the other end of the sixth resistor are connected to one end of the seventh resistor, the other end of the third capacitor and the other end of the seventh resistor are grounded, the CO pin of the first sensor is connected to the other end of the sixth resistor, the three second output ends include a fifteenth pin, a fourteenth pin and a sixteenth pin, the three second input ends include a thirteenth pin, a twelfth pin and a seventeenth pin, the fifteenth pin is connected to the first input end of the first infrared sensing module, the fourteenth pin is connected to the first input end of the second infrared sensing module, the sixteenth pin is connected to the first input end of the third infrared sensing module, the thirteenth pin is connected to the first output end of the first infrared sensing module, the twelfth pin is connected to the first output end of the second infrared sensing module, and the seventeenth pin is connected to the first output end of the third infrared sensing module.

[0082] The working principle of the positioning circuit for a C3200 camera described in the present invention is as follows: when the first sensor in the first infrared sensing module, the second infrared sensing module, and the third infrared sensing module passes through the through hole on the back of the rotating wheel, the intensity of the reflected light received is different. The first sensor will send a signal to the main controller, which will convert the optical signal into an electrical signal. The electrical signal is transmitted to the thirteenth and fifteenth pins of the main controller, and the ADC value is read. The position is determined based on the ADC (digital-to-analog conversion) value. After the signal processing is completed, the main controller will feed back the signal to the motor control chip, which then drives the stepping motor to start rotating.

[0083] From the above description, it can be seen that the beneficial effect of the present invention is that by setting the first infrared sensing module, the second infrared sensing module, the third infrared sensing module, the main controller and the motor control chip, it is beneficial to improve the control accuracy of electronic positioning.

[0084] Furthermore, it also includes a stepper motor, the first motor input terminal on the main controller is the tenth pin, the second motor input terminal on the main controller is the forty-fifth pin, the first motor output terminal on the motor control chip is the nineteenth pin, the second motor output terminal on the motor control chip is the third pin, the tenth pin is connected to the nineteenth pin, the third pin is connected to the forty-fifth pin, and the motor control chip is also provided with a fourth pin, an eleventh pin, an eighteenth pin and a twenty-fifth pin, and the fourth pin, the eleventh pin, the eighteenth pin and the twenty-fifth pin are all connected to the stepper motor.

[0085] From the above description, it can be seen that by also including a stepper motor, the first motor input terminal on the main controller is the tenth pin, the second motor input terminal on the main controller is the forty-fifth pin, the first motor output terminal on the motor control chip is the nineteenth pin, the second motor output terminal on the motor control chip is the third pin, the tenth pin is connected to the nineteenth pin, and the third pin is connected to the forty-fifth pin. The motor control chip is also provided with a fourth pin, an eleventh pin, an eighteenth pin and a twenty-fifth pin, and the fourth pin, the eleventh pin, the eighteenth pin and the twenty-fifth pin are all connected to the stepper motor, which is conducive to controlling the working state of the stepper motor.

[0086] Furthermore, it also includes a buzzer circuit module. The main controller is provided with a twenty-ninth pin, and the buzzer circuit module is connected to the twenty-ninth pin.

[0087] From the above description, it can be seen that by further including a buzzer circuit module, a twenty-ninth pin is provided on the main controller, and the buzzer circuit module is connected to the twenty-ninth pin, which is beneficial to improving the safety of the circuit structure.

[0088] Furthermore, it also includes a thermistor. The main controller is also provided with an eleventh pin of the main controller, and the thermistor is connected to the eleventh pin of the main controller.

[0089] As can be seen from the above description, by further including a thermistor, the main controller is also provided with an eleventh pin, and the thermistor is connected to the eleventh pin, which is beneficial to improving the heat dissipation of the circuit device.

[0090] Furthermore, the main controller adopts STM32F103CBT6 chip.

[0091] From the above description, it can be seen that the use of the STM32F103CBT6 chip in the main controller is conducive to improving the control accuracy of the circuit device.

[0092] Furthermore, the motor control chip adopts A3980 chip.

[0093] From the above description, it can be seen that the use of the A3980 chip as the motor control chip is conducive to controlling the working state of the stepper motor.

[0094] Furthermore, the first sensor is an infrared sensor SFH9201.

[0095] From the above description, it can be seen that the use of the infrared sensor SFH9201 as the first sensor is conducive to further improving the positioning accuracy.

[0096] Furthermore, the first MOS transistor is of SI2333 type.

[0097] As can be seen from the above description, the use of SI2333 type as the first MOS tube is beneficial to improving the usability of the switch.

[0098] Please refer to Figures 1 to 8 As shown, the first embodiment of the present invention is:

[0099] A positioning circuit for a C3200 camera includes a first infrared sensing module 1, a second infrared sensing module 2, a third infrared sensing module 3, a main controller 4, and a motor control chip 5. The first infrared sensing module 1, the second infrared sensing module 2, and the third infrared sensing module 3 are each provided with a first input terminal 6 and a first output terminal 7. The main controller 4 is provided with three second input terminals 8 and three second output terminals 9. Each first input terminal 6 is connected to a corresponding second input terminal 8.

[0100] The main controller 4 is further provided with a first motor input terminal 10 and a second motor input terminal 11, and the motor control chip 5 is provided with a first motor output terminal 12 and a second motor output terminal 13, wherein the first motor input terminal 10 is connected to the first motor output terminal 12, and the second motor input terminal 11 is connected to the second motor output terminal 13.

[0101] The first infrared sensing module 1, the second infrared sensing module 2 and the third infrared sensing module 3 are each provided with a first test point 14, a first resistor 15, a second resistor 16, a first capacitor 17, a first power supply 18, a first MOS transistor 19, a third resistor 20, a fourth resistor 21, a first magnetic bead 22, a second capacitor 23, a first sensor 24, a fifth resistor 25, a sixth resistor 26, a seventh resistor 27 and a third capacitor 28;

[0102] One end of the first resistor 15 and one end of the first test point 14 are both connected to the first input terminal 6, one end of the second resistor 16 and the gate of the first MOS transistor 19 are both connected to the other end of the first resistor 15, the other end of the second resistor 16 and the source of the first MOS transistor 19 are both connected to one end of the first capacitor 17, the other end of the first capacitor 17 is grounded, the first power supply 18 is respectively connected to one end of the first capacitor 17, the other end of the second resistor 16 and the source of the first MOS transistor 19, one end of the third resistor 20, one end of the fourth resistor 21 and one end of the first magnetic bead 22 are all connected to the drain of the first MOS transistor 19, the other end of the first magnetic bead 22 is connected to the drain of the first MOS transistor 19. The first terminal of the first sensor 24 is connected to the first power supply 18, the other end of the third resistor 20 and the other end of the fourth resistor 21 are connected to one end of the second capacitor 23, the other end of the second capacitor 23 is grounded, the AN pin on the first sensor 24 is connected to the other end of the fourth resistor 21, one end of the fifth resistor 25 and one end of the sixth resistor 26 are connected to the first power supply 18 and to one end of the third capacitor 28, the other end of the fifth resistor 25 and the other end of the sixth resistor 26 are connected to one end of the seventh resistor 27, the other end of the third capacitor 28 and the other end of the seventh resistor 27 are grounded, and the CO pin of the first sensor 24 is connected to the other end of the sixth resistor 26.

[0103] The three second output terminals 8 include a fifteenth pin 29, a fourteenth pin 30, and a sixteenth pin 31. The three second input terminals 9 include a thirteenth pin 32, a twelfth pin 33, and a seventeenth pin 34. The fifteenth pin 29 is connected to the first input terminal 6 of the first infrared sensing module 1, the fourteenth pin 30 is connected to the first input terminal 7 of the second infrared sensing module 2, the sixteenth pin 31 is connected to the first input 7 of the third infrared sensing module 3, the thirteenth pin 32 is connected to the first output terminal 6 of the first infrared sensing module 1, the twelfth pin 33 is connected to the first output terminal 6 of the second infrared sensing module 2, and the seventeenth pin 34 is connected to the first output terminal 6 of the third infrared sensing module 3;

[0104] It also includes a stepper motor, the first motor input terminal 10 on the main controller 4 is the tenth pin 35, the second motor input terminal 11 on the main controller 4 is the forty-fifth pin 36, the first motor output terminal 12 on the motor control chip 5 is the nineteenth pin 37, the second motor output terminal 13 on the motor control chip 5 is the third pin 38, the tenth pin 35 is connected to the nineteenth pin 37, the third pin 38 is connected to the forty-fifth pin 36, and the motor control chip 5 is also provided with a fourth pin 39, an eleventh pin 40, an eighteenth pin 41 and a twenty-fifth pin 42, and the fourth pin 39, the eleventh pin 40, the eighteenth pin 41 and the twenty-fifth pin 42 are all connected to the stepper motor.

[0105] It also includes a buzzer circuit module 43. The main controller 4 is provided with a twenty-ninth pin 44, and the buzzer circuit module 43 is connected to the twenty-ninth pin 44. It also includes a thermistor 45. The main controller 4 is also provided with an eleventh pin 46 of the main controller, and the thermistor 45 is connected to the eleventh pin 46 of the main controller. The main controller 4 adopts the STM32F103CBT6 chip, the motor control chip 5 adopts the A3980 chip, the first sensor 24 adopts the infrared sensor SFH9201 type, and the first MOS tube 19 adopts the SI2333 type.

[0106] The first sensor 24 uses an infrared sensor SFH9201, which can convert the intensity of light into changes in electrical signals. Therefore, when the first sensor 24 passes through the through hole on the back of the wheel, the intensity of the reflected light received is different. At this time, a signal is sent to the main controller 4, and the main controller 4 performs the next step.

[0107] The CO pin of the first sensor 24 is connected to the Figure 1 When the first sensor 24 passes through the through hole, the main controller 4 reads the ADC value, determines the position according to the ADC value, and completes the detection; the AN pin of the first sensor 24 is connected to the attached Figure 1 The first MOS tube 19 is an S12333 type MOS tube. The first MOS tube 19 is used as a switch. When the CO pin of the first sensor 24 detects, the AN pin sends a signal. According to the information fed back from different positions, it is determined whether the required position has been reached. If it is the required position, the motor is controlled to stop rotating. If not, it continues to rotate.

[0108] Attachment Figure 2 and attached Figure 3 The wiring method in the Figure 1 Stay consistent, attach Figure 1 , Attachment Figure 2 and attached Figure 3 TP8 in the figure can be understood as TestPoint. The function of the test point is to detect whether the components are correct and whether the circuit has a short circuit or an open circuit, which is convenient for debugging. The first magnetic bead 22 can be used to suppress high-frequency noise and spike interference on the power line and the signal line. A3V3 in the figure is the power supply, GND is the ground, the R element is the resistor, and the C element is the capacitor. After receiving the signal sent by the first sensor 24, the main controller 4 controls the stepper motor through the code to stop rotating and let it stop and reach the specified position.

[0109] Assume that when the first sensor 24 receives changes in external reflected light, the signal is converted from an optical signal to an electrical signal, and the electrical signal is transmitted to the thirteenth pin 32 and the fifteenth pin 29 of the main controller 4, and the size of the ADC value is read, and the position is determined according to the size of the ADC value; similarly, the signals sent by the other two infrared sensing modules are respectively transmitted to the twelfth pin 33 and the fourteenth pin 30, and the sixteenth pin 31 and the seventeenth pin 34 (ADC-digital-to-analog conversion) of the main controller 4.

[0110] When the required position is selected, the tenth pin 35 of the main controller 4 is connected to the nineteenth pin 37 of the motor control chip 5. The nineteenth pin 37 on the motor control chip 5 is a pulse input terminal. The size of the pulse determines how many steps the motor can take. Then the stepper motor is connected to OUT1A, OUT2A, OUT1B and OUT2B of the motor control chip 5 (that is, the fourth pin 39, the eleventh pin 40, the eighteenth pin 41 and the twenty-fifth pin 42 of the motor control chip 5), and the motor rotates.

[0111] The third pin 38 of the motor control chip 5 is connected to the forty-fifth pin 36 of the main controller 4, which can control the direction of the motor. MS1 and MS2 are the control ends of the stepping direction of the stepper motor. When the values ​​of the two pins are 00, 01, 10, and 11 respectively, the step distance of the stepper motor is controlled to be 1, 2, 1 / 8, and 1 / 16 respectively.

[0112] The circuit structure of the buzzer circuit module 43 is shown in the attached figure. Figure 6 As shown, the buzzer is set in three states. When the buzzer sounds long (on for 3 seconds and off for 1 second), the camera DC power supply voltage is abnormal; when the buzzer sounds short (on for 1 second and off for 1 second), the internal temperature of the camera is too high. For the internal electronic components, it has exceeded the maximum recommended operating temperature of 40°C; when the buzzer sounds long and short repeatedly (on for 1 second and off for 1 second, on for 3 seconds and off for 1 second in a cycle), there is a problem with the filter and it stops running. The camera can still operate, but the filter wheel is not rotating. At this time, the filter wheel may be in any position. The camera power must be turned off and the filter wheel must be restarted. The twenty-ninth pin 44 of the main controller 4 is connected to the external circuit to control the state of the buzzer.

[0113] The circuit structure of thermistor 45 is shown in the attached figure. Figure 7 As shown in the figure, R34 and R35 are NTC resistors (thermistors 45), which are resistors whose resistance decreases as the temperature increases. The NTC_VIN terminal in the figure is connected to the eleventh pin 46 of the main controller of the main controller 4. By reading the value sampled by the ADC, the temperature can be estimated. If the read temperature is higher than the set temperature, the twenty-first pin (FAN_EN) of the main controller 4 is connected to the ADC. Figure 8 The fan circuit 47 is connected, and finally VCC_FAN is connected to the 2pin terminal and connected to the fan to achieve the purpose of heat dissipation.

[0114] The numbers in the attached figure explain 56K / 0603 / 1%, where 56K is the resistance value of the resistor, 0603 is the name of the resistor package, and 1% is the accuracy error of the resistor.

[0115] In summary, the positioning circuit for a C3200 camera provided by the present invention is beneficial to improving the control accuracy of electronic positioning by setting a first infrared sensing module, a second infrared sensing module, a third infrared sensing module, a main controller and a motor control chip.

[0116] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A positioning circuit for a C3200 camera, characterized in that: It includes a first infrared sensing module, a second infrared sensing module, a third infrared sensing module, a main controller and a motor control chip, wherein the first infrared sensing module, the second infrared sensing module and the third infrared sensing module are each provided with a first input terminal and a first output terminal, and the main controller is provided with three second input terminals and three second output terminals; The main controller is further provided with a first motor input terminal and a second motor input terminal, the motor control chip is provided with a first motor output terminal and a second motor output terminal, the first motor input terminal is connected to the first motor output terminal, and the second motor input terminal is connected to the second motor output terminal, and the first infrared sensing module, the second infrared sensing module and the third infrared sensing module are each provided with a first test point, a first resistor, a second resistor, a first capacitor, a first power supply, a first MOS tube, a third resistor, a fourth resistor, a first magnetic bead, a second capacitor, a first sensor, a fifth resistor, a sixth resistor, a seventh resistor and a third capacitor; One end of the first resistor and one end of the first test point are both connected to the first input end, one end of the second resistor and the gate of the first MOS transistor are both connected to the other end of the first resistor, the other end of the second resistor and the source of the first MOS transistor are both connected to one end of the first capacitor, the other end of the first capacitor is grounded, the first power supply is respectively connected to one end of the first capacitor, the other end of the second resistor, and the source of the first MOS transistor, one end of the third resistor, one end of the fourth resistor, and one end of the first magnetic bead are all connected to the drain of the first MOS transistor, the other end of the first magnetic bead is connected to the first power supply, the other end of the third resistor and the other end of the fourth resistor are connected to one end of the second capacitor, the other end of the second capacitor is grounded, the AN pin on the first sensor is connected to the other end of the fourth resistor, and one end of the fifth resistor and one end of the sixth resistor are connected to the first power supply, and The first sensor is connected to one end of the third capacitor, the other end of the fifth resistor and the other end of the sixth resistor are connected to one end of the seventh resistor, the other end of the third capacitor and the other end of the seventh resistor are grounded, the CO pin of the first sensor is connected to the other end of the sixth resistor, the three second output ends include a fifteenth pin, a fourteenth pin and a sixteenth pin, the three second input ends include a thirteenth pin, a twelfth pin and a seventeenth pin, the fifteenth pin is connected to the first input end of the first infrared sensing module, the fourteenth pin is connected to the first input end of the second infrared sensing module, the sixteenth pin is connected to the first input end of the third infrared sensing module, the thirteenth pin is connected to the first output end of the first infrared sensing module, the twelfth pin is connected to the first output end of the second infrared sensing module, and the seventeenth pin is connected to the first output end of the third infrared sensing module.

2. The positioning circuit for a C3200 camera according to claim 1, characterized in that: It also includes a stepper motor, the first motor input terminal on the main controller is the tenth pin, the second motor input terminal on the main controller is the forty-fifth pin, the first motor output terminal on the motor control chip is the nineteenth pin, the second motor output terminal on the motor control chip is the third pin, the tenth pin is connected to the nineteenth pin, and the third pin is connected to the forty-fifth pin. The motor control chip is also provided with a fourth pin, an eleventh pin, an eighteenth pin and a twenty-fifth pin, and the fourth pin, the eleventh pin, the eighteenth pin and the twenty-fifth pin are all connected to the stepper motor.

3. The positioning circuit for a C3200 camera according to claim 1, characterized in that: It also includes a buzzer circuit module. The main controller is provided with a twenty-ninth pin, and the buzzer circuit module is connected to the twenty-ninth pin.

4. The positioning circuit for a C3200 camera according to claim 1, characterized in that: It also includes a thermistor. The main controller is also provided with an eleventh pin of the main controller, and the thermistor is connected to the eleventh pin of the main controller.

5. The positioning circuit for a C3200 camera according to claim 1, characterized in that: The main controller adopts STM32F103CBT6 chip.

6. The positioning circuit for a C3200 camera according to claim 1, characterized in that: The motor control chip adopts A3980 chip.

7. The positioning circuit for a C3200 camera according to claim 1, characterized in that: The first sensor is an infrared sensor SFH9201.

8. The positioning circuit for a C3200 camera according to claim 1, characterized in that: The first MOS tube is of SI2333 type.

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