LORA integrated low-power-consumption controller

Abstract

The LORA integrated low-power-consumption controller comprises a power supply circuit, a main control circuit and a communication circuit, the power supply circuit is respectively connected with the main control circuit and the communication circuit, and the main control circuit is connected with the communication circuit; the main control circuit comprises a main control chip U2, and a VCC pin of the main control chip U2 is connected with the lithium battery through the power supply circuit; a PB6 pin and a PA2 pin of the main control chip U2 are connected with a first sensor through a first connector H1, a PB5 pin and a PB4 pin of the main control chip U2 are connected with a second sensor through a second connector H5, and a PA7 pin and a PA6 pin of the main control chip U2 are connected with a third sensor through a third connector H6; and a PA4 pin, a PA1 pin, a PA0 pin, a PB0 pin, a PB1 pin, a PB2 pin and a PB3 pin of the main control chip U2 are all connected with the communication circuit.

Description

Technical Field

[0001] This utility model relates to the field of controllers, and more particularly to a LORA integrated low-power controller. Background Technology

[0002] A laser transmitter is a device that uses laser light to effectively transmit information and can be applied in a variety of fields. Patent No. ZL201020244176.9 discloses a semiconductor laser module with multiple detection sensors and protection devices. This laser system is equipped with multiple sensors. Since each sensor is an independent system without the participation of a management chip, it does not have a standby mode when not in use, resulting in high power consumption and high battery capacity requirements. Furthermore, its system response time is relatively long, the communication data structure is complex, and the reliability is poor, so it is necessary to improve it. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a LORA integrated low-power controller with a simple structure and low power consumption.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A LoRa integrated low-power controller includes a power supply circuit, a main control circuit, and a communication circuit. The power supply circuit is connected to both the main control circuit and the communication circuit, and the main control circuit is connected to the communication circuit. The main control circuit includes a main control chip U2. The VCC pin of the main control chip U2 is connected to a lithium battery via the power supply circuit. The PB6 and PA2 pins of the main control chip U2 are connected to a first sensor via a first connector H1. The PB5 and PB4 pins of the main control chip U2 are connected to a second sensor via a second connector H5. The PA7 and PA6 pins of the main control chip U2 are connected to a third sensor via a third connector H6. The PA4, PA1, PA0, PB0, PB1, PB2, and PB3 pins of the main control chip U2 are all connected to the communication circuit.

[0006] Furthermore, the power supply circuit includes a power chip U3. The IN pin of the power chip U3 is connected to one end of resistor R8, one end of capacitor C7, one end of capacitor C6, and one end of resistor R12. The other end of resistor R8 is connected to the EN pin of the power chip U3. The other ends of capacitors C7 and C6 are both grounded. The other end of resistor R12 is connected to one end of resistor R11 and the gate of MOSFET Q2. The other end of resistor R11 and the source of MOSFET Q2 are both grounded. The drain of MOSFET Q2 is connected to the lithium battery through one end of power connector CN1. The SW pin of the power chip U3 is connected to one end of inductor L1 and one end of capacitor C5, respectively. The other end of capacitor C5 is connected to the BS pin of the power chip U3. The other end of inductor L1 is connected to one end of capacitor C8 and capacitor E2, respectively. The other ends of capacitor C8 and capacitor E2 are both grounded. The GND pin of the power chip U3 is grounded. The FB pin of the power chip U3 is connected to one end of resistor R9 and one end of resistor R10, respectively. The other end of resistor R10 is grounded. The other end of resistor R9 is connected to the first voltage regulator circuit and the second voltage regulator circuit, respectively.

[0007] Furthermore, the first voltage regulator circuit includes a voltage regulator chip U1. The VIN pin of the voltage regulator chip U1 is connected to one end of the resistor R9 and one end of the capacitor C3, respectively. The other end of the capacitor C3 and the GND pin of the voltage regulator chip U1 are both grounded. The VOUT pin of the voltage regulator chip U1 is connected to one end of the capacitor C4, the VCC pin of the main control chip U2, the communication circuit, the first connector H1, and the third connector H6, respectively. The other end of the capacitor C4 is grounded.

[0008] Furthermore, the second voltage regulator circuit includes a resistor R1 and a MOSFET Q1. One end of the resistor R1 is connected to one end of the resistor R9, and the other end of the resistor R1 is connected to one end of the resistor R4 and the source of the MOSFET Q1. The gate of the MOSFET Q1 and the other end of the resistor R4 are both connected to one end of the resistor R5. The other end of the resistor R5 is connected to the PB7 pin of the main control chip U2, and the drain of the MOSFET Q1 is connected to the second connector H5.

[0009] Furthermore, the communication circuit includes a wireless module U4. The VCC pin of the wireless module U4 is connected to one end of capacitor C10, one end of capacitor C9, and the VOUT pin of the voltage regulator chip U1, respectively. The other ends of capacitors C10 and C9 are both grounded. The DIO2 pin of the wireless module U4 is connected to one end of resistor R13, and the other end of resistor R13 is connected to the TXEN pin of the wireless module U4. The ANT pin of the wireless module U4 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the wireless antenna. The RXEN pin of the wireless module U4 is connected to the main control chip. Connect the PA4 pin of the wireless module U2 to the main control chip U2. Connect the NSS pin of the wireless module U4 to the PB3 pin of the main control chip U2. Connect the SCK pin of the wireless module U4 to the PB2 pin of the main control chip U2. Connect the MOSI pin of the wireless module U4 to the PB1 pin of the main control chip U2. Connect the MISO pin of the wireless module U4 to the PB0 pin of the main control chip U2. Connect the NRST pin of the wireless module U4 to the PA0 pin of the main control chip U2. Connect the BUSY pin of the wireless module U4 to the PA1 pin of the main control chip U2. Connect the GND pin of the wireless module U4 to ground.

[0010] Furthermore, the main control circuit also includes an indicator light LED1. One end of the indicator light LED1 is connected to the PC1 pin of the main control chip U2, and the other end of the indicator light LED1 is connected to one end of the resistor R6, with the other end of the resistor R6 grounded.

[0011] Furthermore, the main control chip U2 is model PY32F002BF15P6TU; the power supply chip U3 is model MT2492; the voltage regulator chip U1 is model HT7333-A; and the wireless module U4 is model E22-400M22S.

[0012] Furthermore, the MOSFET Q1 is model AO3401A; the MOSFET Q2 is model AO3400A.

[0013] Furthermore, the first and third sensors are distance sensors or tilt sensors; the second sensor is a laser sensor.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are:

[0015] This invention, by incorporating a main control chip in the main control circuit, allows the main control chip to separately control the sensors connected to the first, second, and third connectors during operation. This enables different sensors to operate at different times, reducing the controller's power consumption, shortening its response time, simplifying its communication data structure, and improving the controller's reliability. Furthermore, this invention can control the on / off state of the laser sensor connected to the second connector using a MOSFET Q1. When the laser sensor is not working, the MOSFET Q1 cuts off the laser sensor's input current, effectively reducing the controller's power consumption and energy loss. It can power the controller without a large-capacity battery, further improving the effectiveness of this invention. Attached Figure Description

[0016] 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 these drawings without creative effort.

[0017] Figure 1 This is a circuit diagram of the power supply circuit;

[0018] Figure 2 This is the circuit structure diagram of the first voltage regulator circuit;

[0019] Figure 3 The connection circuit diagram of the main control chip;

[0020] Figure 4 This is a circuit structure diagram of a communication circuit;

[0021] Figure 5 This is the circuit structure diagram of the second voltage regulator circuit;

[0022] Figure 6 This is the connection circuit diagram for the third connector. Detailed Implementation

[0023] 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, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of the present utility model.

[0024] like Figures 1 to 6As shown, this embodiment discloses a LORA integrated low-power controller, including a power supply circuit, a main control circuit, and a communication circuit. The power supply circuit is connected to the main control circuit and the communication circuit, respectively, and the main control circuit is connected to the communication circuit.

[0025] The main control circuit includes a main control chip U2, model number PY32F002BF15P6TU; the VCC pin of the main control chip U2 is connected to the lithium battery via a power supply circuit; the PB6 and PA2 pins of the main control chip U2 are connected to the first sensor via a first connector H1; the PB5 and PB4 pins of the main control chip U2 are connected to the second sensor via a second connector H5; the PA7 and PA6 pins of the main control chip U2 are connected to the third sensor via a third connector H6; the PA4, PA1, PA0, PB0, PB1, PB2, and PB3 pins of the main control chip U2 are all connected to the communication circuit.

[0026] The first and third sensors are distance sensors or tilt sensors; the second sensor is a laser sensor.

[0027] The main control circuit also includes an indicator light LED1. One end of the indicator light LED1 is connected to the PC1 pin of the main control chip U2, and the other end of the indicator light LED1 is connected to one end of the resistor R6, and the other end of the resistor R6 is grounded.

[0028] In the main control circuit, the main control chip U2 is connected to the LORA communication circuit via SPI, and communicates with the laser and tilt sensors via TTL level UART. In order to reduce power consumption and save system resources, the main control chip U2 can perform variable serial port I / O. When the LORA communication circuit receives information during operation, it turns on the laser to measure distance, and the tilt sensor performs measurement when idle. It controls three different sensors in a time-division manner, which makes the device consume less power, reduce resources, and make the overall size smaller.

[0029] Temperature and sunlight both affect the measurement accuracy in 905nm infrared laser measurement. In practical applications, temperature is obtained from the main control chip U2 for compensation, and sunlight data is compensated based on the time in the server.

[0030] The power supply circuit includes a power chip U3, model MT2492. The IN pin of power chip U3 is connected to one end of resistor R8, one end of capacitor C7, one end of capacitor C6, and one end of resistor R12. The other end of resistor R8 is connected to the EN pin of power chip U3. The other ends of capacitors C7 and C6 are grounded. The other end of resistor R12 is connected to one end of resistor R11 and the gate of MOSFET Q2. The other end of resistor R11 and the source of MOSFET Q2 are grounded. The drain of MOSFET Q2 is connected to the lithium battery via one end of power connector CN1. The S-tube Q2 is model AO3400A; the SW pin of the power chip U3 is connected to one end of inductor L1 and one end of capacitor C5 respectively, the other end of capacitor C5 is connected to the BS pin of power chip U3, the other end of inductor L1 is connected to one end of capacitor C8 and capacitor E2 respectively, and the other ends of capacitor C8 and capacitor E2 are both grounded; the GND pin of the power chip U3 is grounded, the FB pin of the power chip U3 is connected to one end of resistor R9 and one end of resistor R10 respectively, the other end of resistor R10 is grounded, and the other end of resistor R9 is connected to the first voltage regulator circuit and the second voltage regulator circuit respectively.

[0031] The first voltage regulator circuit includes a voltage regulator chip U1, model HT7333-A; the VIN pin of the voltage regulator chip U1 is connected to one end of resistor R9 and one end of capacitor C3 respectively, the other end of capacitor C3 and the GND pin of voltage regulator chip U1 are grounded, the VOUT pin of voltage regulator chip U1 is connected to one end of capacitor C4, the VCC pin of main control chip U2, the communication circuit, the first connector H1 and the third connector H6 respectively; the other end of capacitor C4 is grounded.

[0032] This invention uses MOSFET Q2 as reverse connection protection, which has very low on-resistance and requires no heat dissipation treatment.

[0033] The power supply circuit and the first voltage regulator circuit use a switching power supply + LDO configuration, which has high conversion efficiency and low ripple, ensuring stable operation of the laser and the LORA wireless module. The power chip U3 can output 1A of current, and the voltage regulator chip U1 can output 300mA of current, which can guarantee the instantaneous transmission current (100mA) of the LORA wireless module.

[0034] The second voltage regulator circuit includes a resistor R1 and a MOSFET Q1, the MOSFET Q1 being an AO3401A. One end of the resistor R1 is connected to one end of the resistor R9, and the other end of the resistor R1 is connected to one end of the resistor R4 and the source of the MOSFET Q1. The gate of the MOSFET Q1 and the other end of the resistor R4 are both connected to one end of the resistor R5. The other end of the resistor R5 is connected to the PB7 pin of the main control chip U2, and the drain of the MOSFET Q1 is connected to the second connector H5.

[0035] The second connector H5 is used to connect the laser sensor. To reduce power consumption, the laser sensor is turned off when not in use via MOSFET Q1. Actual test results show that the standby current is <10mA, which significantly reduces power consumption and energy consumption.

[0036] The communication circuit includes a wireless module U4, model E22-400M22S. The VCC pin of the wireless module U4 is connected to one end of capacitor C10, one end of capacitor C9, and the VOUT pin of the voltage regulator chip U1. The other ends of capacitors C10 and C9 are grounded. The DIO2 pin of the wireless module U4 is connected to one end of resistor R13, and the other end of resistor R13 is connected to the TXEN pin of the wireless module U4. The ANT pin of the wireless module U4 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the wireless antenna. The XEN pin is connected to the PA4 pin of the main control chip U2. The NSS pin of the wireless module U4 is connected to the PB3 pin of the main control chip U2. The SCK pin of the wireless module U4 is connected to the PB2 pin of the main control chip U2. The MOSI pin of the wireless module U4 is connected to the PB1 pin of the main control chip U2. The MISO pin of the wireless module U4 is connected to the PB0 pin of the main control chip U2. The NRST pin of the wireless module U4 is connected to the PA0 pin of the main control chip U2. The BUSY pin of the wireless module U4 is connected to the PA1 pin of the main control chip U2. The GND pin of the wireless module U4 is grounded.

[0037] To improve responsiveness, the laser acquisition method was adjusted in the program, with each communication using the prepared laser distance. After the laser measurement data is obtained, the power is promptly turned off to reduce power consumption. To further reduce power consumption and facilitate production applications, an address learning function was designed for communication. A dedicated address is registered during laser installation; after communication, the machine obtains the address upon laser response. Communication will only resume if the address is correct during subsequent laser measurements.

[0038] This invention, by incorporating a main control chip in the main control circuit, allows the main control chip to separately control the sensors connected to the first, second, and third connectors during operation. This enables different sensors to operate at different times, reducing the controller's power consumption, shortening its response time, simplifying its communication data structure, and improving the controller's reliability. Furthermore, this invention can control the on / off state of the laser sensor connected to the second connector using a MOSFET Q1. When the laser sensor is not working, the MOSFET Q1 cuts off the laser sensor's input current, effectively reducing the controller's power consumption and energy loss. It can power the controller without a large-capacity battery, further improving the effectiveness of this invention.

Claims

1. A LoRa integrated low-power controller, characterized in that: The LORA integrated low-power controller includes a power supply circuit, a main control circuit, and a communication circuit. The power supply circuit is connected to both the main control circuit and the communication circuit, and the main control circuit is connected to the communication circuit. The main control circuit includes a main control chip U2. The VCC pin of the main control chip U2 is connected to a lithium battery via the power supply circuit. The PB6 and PA2 pins of the main control chip U2 are connected to a first sensor via a first connector H1. The PB5 and PB4 pins of the main control chip U2 are connected to a second sensor via a second connector H5. The PA7 and PA6 pins of the main control chip U2 are connected to a third sensor via a third connector H6. The PA4, PA1, PA0, PB0, PB1, PB2, and PB3 pins of the main control chip U2 are all connected to the communication circuit.

2. The LoRa integrated low-power controller as described in claim 1, characterized in that: The power supply circuit includes a power chip U3. The IN pin of the power chip U3 is connected to one end of resistor R8, one end of capacitor C7, one end of capacitor C6, and one end of resistor R12. The other end of resistor R8 is connected to the EN pin of the power chip U3. The other ends of capacitors C7 and C6 are both grounded. The other end of resistor R12 is connected to one end of resistor R11 and the gate of MOSFET Q2. The other end of resistor R11 and the source of MOSFET Q2 are both grounded. The drain of MOSFET Q2 is connected to the lithium battery via one end of power connector CN1. The SW pin of power chip U3 is connected to one end of inductor L1 and one end of capacitor C5, respectively. The other end of capacitor C5 is connected to the BS pin of power chip U3. The other end of inductor L1 is connected to one end of capacitor C8 and capacitor E2, respectively. The other ends of capacitor C8 and capacitor E2 are both grounded. The GND pin of power chip U3 is grounded. The FB pin of power chip U3 is connected to one end of resistor R9 and one end of resistor R10, respectively. The other end of resistor R10 is grounded. The other end of resistor R9 is connected to the first voltage regulator circuit and the second voltage regulator circuit, respectively.

3. The LoRa integrated low-power controller as described in claim 2, characterized in that: The first voltage regulator circuit includes a voltage regulator chip U1. The VIN pin of the voltage regulator chip U1 is connected to one end of the resistor R9 and one end of the capacitor C3, respectively. The other end of the capacitor C3 and the GND pin of the voltage regulator chip U1 are grounded. The VOUT pin of the voltage regulator chip U1 is connected to one end of the capacitor C4, the VCC pin of the main control chip U2, the communication circuit, the first connector H1, and the third connector H6, respectively. The other end of the capacitor C4 is grounded.

4. The LoRa integrated low-power controller as described in claim 3, characterized in that: The second voltage regulator circuit includes a resistor R1 and a MOSFET Q1. One end of the resistor R1 is connected to one end of the resistor R9. The other end of the resistor R1 is connected to one end of the resistor R4 and the source of the MOSFET Q1. The gate of the MOSFET Q1 and the other end of the resistor R4 are both connected to one end of the resistor R5. The other end of the resistor R5 is connected to the PB7 pin of the main control chip U2. The drain of the MOSFET Q1 is connected to the second connector H5.

5. The LoRa integrated low-power controller as described in claim 4, characterized in that: The communication circuit includes a wireless module U4. The VCC pin of the wireless module U4 is connected to one end of capacitor C10, one end of capacitor C9, and the VOUT pin of the voltage regulator chip U1. The other ends of capacitors C10 and C9 are grounded. The DIO2 pin of the wireless module U4 is connected to one end of resistor R13, and the other end of resistor R13 is connected to the TXEN pin of the wireless module U4. The ANT pin of the wireless module U4 is connected to one end of resistor R14, and the other end of resistor R14 is connected to the wireless antenna. The RXEN pin of the wireless module U4 is connected to the main control chip U1. Connect the PA4 pin of the wireless module U4 to the PB3 pin of the main control chip U2, connect the SCK pin of the wireless module U4 to the PB2 pin of the main control chip U2, connect the MOSI pin of the wireless module U4 to the PB1 pin of the main control chip U2, connect the MISO pin of the wireless module U4 to the PB0 pin of the main control chip U2, connect the NRST pin of the wireless module U4 to the PA0 pin of the main control chip U2, connect the BUSY pin of the wireless module U4 to the PA1 pin of the main control chip U2, and ground the GND pin of the wireless module U4.

6. The LoRa integrated low-power controller as described in claim 5, characterized in that: The main control circuit also includes an indicator light LED1. One end of the indicator light LED1 is connected to the PC1 pin of the main control chip U2, and the other end of the indicator light LED1 is connected to one end of the resistor R6, and the other end of the resistor R6 is grounded.

7. The LoRa integrated low-power controller as described in claim 6, characterized in that: The main control chip U2 is model PY32F002BF15P6TU; the power supply chip U3 is model MT2492; the voltage regulator chip U1 is model HT7333-A; and the wireless module U4 is model E22-400M22S.

8. The LoRa integrated low-power controller as described in claim 7, characterized in that: The MOSFET Q1 is model AO3401A; the MOSFET Q2 is model AO3400A.

9. The LoRa integrated low-power controller as described in claim 8, characterized in that: The first and third sensors are distance sensors or tilt sensors; the second sensor is a laser sensor.

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