ECAS height calibration auxiliary device based on TOF distance measurement

Abstract

The utility model discloses an ECAS height calibration auxiliary device based on TOF distance measurement. The ECAS height calibration auxiliary device comprises a left front distance detection device, a right front distance detection device, a left rear distance detection device, a right rear distance detection device and a main controller. An automobile is parked on a supporting face, the left front distance detection device is installed on a front axle in the automobile and close to a left front wheel, and the left front distance detection device is used for detecting the distance between the position where the left front distance detection device is located and the supporting face. The right front distance detection device is installed on a front axle in the automobile and close to a right front wheel, and the right front distance detection device is used for detecting the distance from the position where the right front distance detection device is located to the supporting face. The left rear distance detection device is installed on a middle rear axle of the automobile and close to a left rear wheel. The ECAS height calibration auxiliary device based on TOF distance measurement solves the problem that in the prior art, the distance between the axis of a left front wheel, the axis of a right front wheel, the axis of a left rear wheel and the axis of a right rear wheel and the supporting face of an automobile cannot be detected.

Description

Technical Field

[0001] This utility model relates to the field of automobile inspection, specifically to an ECAS height calibration auxiliary device based on TOF ranging. Background Technology

[0002] ECAS stands for Electronically Controlled Air Suspension System, and TOF stands for Time of Flight Distance Measurement.

[0003] The car suspension system includes a front axle and a rear axle. The left front wheel, which can rotate, is mounted on the left end of the front axle, and the right front wheel, which can rotate, is mounted on the right end of the front axle. The left rear wheel, which can rotate, is mounted on the left end of the rear axle, and the right rear wheel, which can rotate, is mounted on the right end of the rear axle.

[0004] To ensure vehicle stability, the axle centers of the left front wheel, right front wheel, left rear wheel, and right rear wheel must all be on the same plane. Before leaving the factory, manufacturers typically adjust these axle centers to be aligned. However, after maintenance, it's necessary to continuously measure the distance from the axle centers of these wheels to the vehicle's support surface. This provides a basis for judging the maintenance quality and facilitates multiple maintenance adjustments based on the test results. Therefore, how to measure the distance between the axle centers of these wheels and the vehicle's support surface is a problem that urgently needs to be solved. Utility Model Content

[0005] This utility model aims to provide an ECAS height calibration auxiliary device based on TOF distance measurement, which solves the problem in the prior art that it cannot detect the distance between the center lines of the left front wheel, right front wheel, left rear wheel, and right rear wheel and the vehicle support surface.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model discloses an ECAS height calibration auxiliary device based on TOF ranging, comprising: a left front distance detection device, a right front distance detection device, a left rear distance detection device, a right rear distance detection device, and a main controller; the car is parked on a supporting surface, the left front distance detection device is installed on the front axle of the car and near the left front wheel, and is used to detect the distance from the location of the left front distance detection device to the supporting surface; the right front distance detection device is installed on the front axle of the car and near the right front wheel, and is used to detect the distance from the location of the right front distance detection device to the supporting surface; the left rear distance detection device is installed on the rear axle of the car and near the left rear wheel, and is used to detect the distance from the location of the left rear distance sensor to the supporting surface; the right rear distance detection device is installed on the rear axle of the car and near the right rear wheel, and is used to detect the distance from the location of the right rear distance sensor to the supporting surface; the left front distance detection device, the right front distance detection device, the left rear distance detection device, and the right rear distance detection device are all communicatively connected to the main controller.

[0008] Preferably, the ECAS altitude calibration auxiliary device based on TOF ranging further includes a rechargeable power supply module, which powers the left front distance detection device, the right front distance detection device, the left rear distance detection device, the right rear distance detection device, and the main controller.

[0009] Preferably, the rechargeable power supply module includes: a DC input power supply, a rechargeable battery, a voltage regulator conversion module, and a charging management module. The output terminal of the DC input power supply is connected to the input terminal of the charging management module, and the output terminal of the charging management module is connected to the positive terminal of the rechargeable battery. The DC input power supply powers the first input terminal of the voltage regulator conversion module, and the positive terminal of the rechargeable battery powers the second input terminal of the voltage regulator conversion module. The voltage regulator conversion module is used to convert the output voltage of the DC input power supply or the output voltage of the rechargeable battery to a specified voltage value. The voltage regulator conversion module powers the main controller's power supply terminal.

[0010] Preferably, the rechargeable power supply module further includes: a battery voltage sampling module and a charging indicator sampling module. The input terminal of the battery voltage sampling module is connected to the positive terminal of the rechargeable battery, the output terminal of the battery voltage sampling module is connected to the first input terminal of the main controller, the output terminal of the DC power supply is connected to the input terminal of the charging indicator sampling module, and the output terminal of the charging indicator sampling module is connected to the second input terminal of the main controller.

[0011] Preferably, the rechargeable power supply module further includes: a controllable power supply switching circuit, wherein the DC input power supply output terminal and the positive terminal of the rechargeable battery are both connected to the voltage regulator conversion module through the controllable power supply switching circuit, the first input terminal of the controllable power supply switching circuit is connected to the DC input power supply output terminal, the second input terminal of the controllable power supply switching circuit is connected to the positive terminal of the rechargeable battery, the output terminal of the controllable power supply switching circuit is connected to the input terminal of the voltage regulator conversion module, and the control terminal of the controllable power supply switching circuit is connected to the output terminal of the main controller.

[0012] Preferably, the rechargeable power supply module further includes: a controllable power supply switching circuit, wherein the DC input power supply output terminal and the positive terminal of the rechargeable battery are both connected to the voltage regulator conversion module through the controllable power supply switching circuit, the first input terminal of the controllable power supply switching circuit is connected to the DC input power supply output terminal, the second input terminal of the controllable power supply switching circuit is connected to the positive terminal of the rechargeable battery, the output terminal of the controllable power supply switching circuit is connected to the input terminal of the voltage regulator conversion module, and the control terminal of the controllable power supply switching circuit is connected to the output terminal of the main controller.

[0013] Preferably, the controlled power supply switching circuit includes: a PMOS transistor Q1, a diode D1, and a resistor R3. The gate of the PMOS transistor Q1 is the first input terminal of the controlled power supply switching circuit, the drain of the PMOS transistor Q1 is the second input terminal of the controlled power supply switching circuit, the first terminal of the resistor R3 is grounded, the second terminal of the resistor R3 is connected to the anode of the diode D1 and the gate of the PMOS transistor Q1, and the cathode of the diode D1 is the output terminal of the controlled power supply switching circuit.

[0014] Preferably, the source of the PMOS transistor Q1 is connected to the anode of the body diode, and the drain of the PMOS transistor Q1 is connected to the cathode of the body diode. When the DC power supply is connected to a 5V voltage, the body diode has the function of limiting the current flow to the positive terminal of the rechargeable battery, so as to avoid affecting the charging of the rechargeable battery.

[0015] 8. The ECAS altitude calibration auxiliary device based on TOF ranging, characterized in that the voltage regulator conversion module includes: capacitor C1, capacitor C2 and buck regulator chip U1, wherein the ground terminal of buck regulator chip U1, the negative terminal of capacitor C1 and the negative terminal of capacitor C2 are all grounded, the input terminal of buck regulator chip U1 is the voltage regulator conversion module, the input terminal of buck regulator chip U1 is connected to the positive terminal of capacitor C1, the output terminal of buck regulator chip U1 is connected to the positive terminal of capacitor C2, and the output terminal of buck regulator chip U1 is the output terminal of the voltage regulator conversion module.

[0016] Preferably, the charging management module includes: resistor R4, resistor R5, capacitor C3, capacitor C4, capacitor C5, diode D2, and charging management chip U2. The DC input power output terminal is connected to the anode of diode D2, the voltage input terminal VCC of charging management chip U2, and the positive terminal of capacitor C3. The cathode of diode D2 is connected to the first terminal of resistor R5. The second terminal of resistor R5 is connected to the CHRG port of charging management chip U2. The first terminal of resistor R4 is connected to the PROG port of charging management chip U2. The negative terminal of capacitor C3, the second terminal of resistor R4, the cathode of capacitor C4, the cathode of capacitor C3, and the cathode of capacitor C5 are all grounded. The BAT terminal of charging management chip U2 is connected to the positive terminal of capacitor C5. The BAT terminal of charging management chip U2 is the output terminal of charging management module.

[0017] Preferably, the battery voltage sampling module includes: resistor R6, resistor R7 and capacitor C6. The positive terminal of the rechargeable battery is connected to the first end of resistor R6, which is the input terminal of the battery voltage sampling module. The second end of resistor R6 is connected to the first end of resistor R7 and the anode of capacitor C6. The second end of resistor R7 and the cathode of capacitor C6 are grounded. The anode of capacitor C6 is the output terminal of the battery voltage sampling module.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In this application, a left front distance detection device detects the distance d1 from its location to the support surface, a right front distance detection device detects the distance d2 from its location to the support surface, a left rear distance detection device detects the distance d3 from its location to the support surface, and a right rear distance detection device detects the distance d4 from its location to the support surface. Thus, the distances d1, d2, d3, and d4 are used to determine the location of the left front wheel, right front wheel, and rear rear wheel. Check if the distances between the center lines of the left and right rear wheels and the vehicle's support surface are consistent. When d1, d2, d3, and d4 are equal, the center lines of the left front wheel, right front wheel, left rear wheel, and right rear wheel have been maintained and corrected to the required position. When d1, d2, d3, and d4 are not equal, the distances between the center lines of the left front wheel, right front wheel, left rear wheel, and right rear wheel and the vehicle's support surface are not equal, and maintenance and correction of the center lines of the left front wheel, right front wheel, left rear wheel, and right rear wheel are required.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a circuit block diagram of an ECAS height calibration auxiliary device based on TOF ranging.

[0022] Figure 2 This is a circuit diagram for the left front distance detection device, right front distance detection device, left rear distance detection device, or right rear distance detection device.

[0023] Figure 3 This is a circuit block diagram of a rechargeable power supply module.

[0024] Figure 4 This is a circuit diagram of the voltage regulator conversion module and the controlled power supply switching circuit.

[0025] Figure 5 This is the circuit diagram for the charging management module.

[0026] Figure 6 This is the circuit diagram for the battery voltage sampling module.

[0027] Figure 7 The circuit diagram for the charging indicator sampling module. Detailed Implementation

[0028] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] like Figure 1 As shown, this utility model discloses an ECAS height calibration auxiliary device based on TOF ranging, including: a left front distance detection device, a right front distance detection device, a left rear distance detection device, a right rear distance detection device, and a main controller; the car is parked on a supporting surface, the left front distance detection device is installed on the front axle of the car and near the left front wheel, and the left front distance detection device is used to detect the distance from the location of the left front distance detection device to the supporting surface; the right front distance detection device is installed on the front axle of the car and near the right front wheel, and the right front distance detection device is used to detect the distance from the location of the right front distance detection device to the supporting surface; the left rear distance detection device is installed on the rear axle of the car and near the left rear wheel, and the left rear distance detection device is used to detect the distance from the location of the left rear distance sensor to the supporting surface; the right rear distance detection device is installed on the rear axle of the car and near the right rear wheel, and the right rear distance detection device is used to detect the distance from the location of the right rear distance detection device to the supporting surface; the left front distance detection device, the right front distance detection device, the left rear distance detection device, and the right rear distance detection device are all communicatively connected to the main controller.

[0030] In this application, the left front distance detection device, the right front distance detection device, the left rear distance detection device, and the right rear distance detection device all include a ranging chip U3 and a slave controller, such as Figure 2As shown, the output terminals (SCL and SDA pins) of the ranging chip U3 are connected to the input terminals of the slave controller for communication, and the slave controller communicates with the master controller. The ranging chip U3 uses the VL53L0CXV0DH / 1 model chip, but other chips with ranging functions can also be used for the ranging chip U3.

[0031] Since both the controller and the main controller use the ESP32-C3 chip with wireless Wi-Fi and Bluetooth communication modules, wireless communication can be achieved between the front distance detection device, the right front distance detection device, the left rear distance detection device, and the right rear distance detection device and the main controller, making it convenient to obtain the collected distance data.

[0032] like Figure 3 As shown, the ECAS altitude calibration auxiliary device based on TOF ranging further includes a rechargeable power supply module, which powers the left front distance detection device, right front distance detection device, left rear distance detection device, right rear distance detection device, and main controller. The left front distance detection device, right front distance detection device, left rear distance detection device, right rear distance detection device, and main controller all require power.

[0033] The rechargeable power supply module includes: a DC power supply, a rechargeable battery, a voltage regulator conversion module, and a charging management module. The DC power supply output terminal (VIN_5V) is connected to the input terminal of the charging management module. The output terminal of the charging management module is connected to the positive terminal of the rechargeable battery. The DC power supply powers the first input terminal of the voltage regulator conversion module, and the positive terminal of the rechargeable battery powers the second input terminal of the voltage regulator conversion module. The voltage regulator conversion module converts the output voltage of the DC power supply or the output voltage of the rechargeable battery to a specified voltage value. The voltage regulator conversion module powers the main controller. The output terminal of the voltage regulator conversion module is marked as 3V3.

[0034] In this application, the DC power supply is connected via a USB connector. When in use, the USB connector is plugged into a computer's USB port, and one line outputs a 5V DC power supply voltage. This ensures that the DC power supply outputs voltage when the USB connector is plugged into the computer's USB port. The DC power supply then powers the rechargeable battery through the charging management module, enabling battery charging. The voltage regulator module converts the output voltage of the DC power supply or the rechargeable battery output voltage to 3.3V, which powers the slave controller, the main controller, and the ranging chip U3.

[0035] The rechargeable power supply module also includes a battery voltage sampling module and a charging indicator sampling module. The input terminal of the battery voltage sampling module is connected to the positive terminal of the rechargeable battery, and the output terminal is connected to the first input terminal of the main controller. The DC power input output terminal VIN_5V is connected to the input terminal of the charging indicator sampling module, and the output terminal of the charging indicator sampling module is connected to the second input terminal of the main controller. The battery voltage sampling module and the charging indicator sampling module respectively sample the output terminals of the rechargeable battery and the main controller, providing feedback to the main controller.

[0036] The rechargeable power supply module also includes a controlled power supply switching circuit. Both the DC power input output (VIN_5V) and the positive terminal of the rechargeable battery are connected to the voltage regulator module via this circuit. The first input of the controlled power supply switching circuit is connected to the DC power input output (VIN_5V), the second input is connected to the positive terminal of the rechargeable battery, the output is connected to the input of the voltage regulator module, and the control terminal is connected to the output of the main controller. Since both the DC power input and the rechargeable battery supply power to the voltage regulator module, a controlled power supply switching circuit is designed to prevent their influence on the module. This circuit automatically disconnects the positive terminal of the rechargeable battery from the input of the voltage regulator module when DC power is available.

[0037] like Figure 4 As shown, the controlled power supply switching circuit includes: a PMOS transistor Q1, a diode D1, and a resistor R3. The gate of the PMOS transistor Q1 is the first input terminal of the controlled power supply switching circuit, and the drain of the PMOS transistor Q1 is the second input terminal. The first terminal of the resistor R3 is grounded, and the second terminal of the resistor R3 is connected to the anode of the diode D1 and the gate of the PMOS transistor Q1. The cathode of the diode D1 is the output terminal of the controlled power supply switching circuit. Using the PMOS transistor Q1, when the DC power supply outputs 5V, the gate of the PMOS transistor Q1 is at a high level. At this time, the source and drain of the PMOS transistor Q1 are not connected, and the positive terminal of the rechargeable battery cannot be connected to the cathode of the diode D1. In this case, the output terminal VIN_5V of the DC power supply powers the input terminal of the voltage regulator conversion module through the diode D1. When the DC power supply is not connected, the gate of the PMOS transistor Q1 is at a low level. At this time, the source and drain of the PMOS transistor Q1 are connected, and the positive terminal of the rechargeable battery powers the input terminal of the voltage regulator conversion module through the PMOS transistor Q1. The above process enables automatic connection to the positive terminal of a rechargeable battery for power supply after the DC power supply is interrupted.

[0038] In this application, the source of the PMOS transistor Q1 is connected to the anode of the body diode, and the drain of the PMOS transistor Q1 is connected to the cathode of the body diode. When the DC power supply is connected to a 5V voltage, the body diode has the function of limiting the current flow to the positive terminal of the rechargeable battery, so as to avoid affecting the charging of the rechargeable battery.

[0039] like Figure 4 As shown, the voltage regulator conversion module includes capacitors C1 and C2, and a buck regulator chip U1. The ground terminal of buck regulator chip U1, the negative terminal of capacitor C1, and the negative terminal of capacitor C2 are all grounded. The input terminal of buck regulator chip U1 is connected to the voltage regulator conversion module, and the input terminal of buck regulator chip U1 is connected to the positive terminal of capacitor C1. The output terminal of buck regulator chip U1 is connected to the positive terminal of capacitor C2, and the output terminal of buck regulator chip U1 is the output terminal of the voltage regulator conversion module. The buck regulator chip U1 uses the ME6210A33M3G model, but other models can also be used, as long as it can reduce the voltage from 5V to 3.3V.

[0040] The charging management module includes: resistors R4 and R5, capacitors C3, C4, and C5, diode D2, and charging management chip U2. The DC input power output terminal VIN_5V is connected to the anode of diode D2, the voltage input terminal VCC of charging management chip U2, and the positive terminal of capacitor C3. The cathode of diode D2 is connected to the first terminal of resistor R5, and the second terminal of resistor R5 is connected to the CHRG port of charging management chip U2. The first terminal of resistor R4 is connected to the PROG port of charging management chip U2. The GND pin of charging management chip U2, the negative terminal of capacitor C3, the second terminal of resistor R4, the cathodes of capacitors C4, C3, and C5 are all grounded. The BAT terminal of charging management chip U2 is connected to the positive terminal of capacitor C5. The BAT terminal of charging management chip U2 is the output terminal of the charging management module. Charging management chip U2 uses the TP4054 model. The charging management module is designed to stabilize the voltage supplied to the positive terminal BAT+ of the rechargeable battery, extending the battery's lifespan.

[0041] The battery voltage sampling module includes resistors R6 and R7, and capacitor C6. The positive terminal of the rechargeable battery is connected to the first end of resistor R6, which is the input terminal of the battery voltage sampling module. The second end of resistor R6 is connected to the first end of resistor R7 and the anode of capacitor C6. The second end of resistor R7 and the cathode of capacitor C6 are grounded. The anode of capacitor C6 is the output terminal of the battery voltage sampling module. Resistors R6 and R7 act as a voltage divider, and capacitor C6 acts as a voltage regulator, enabling the main controller to obtain the positive terminal voltage of the rechargeable battery.

[0042] The charging indicator sampling module includes: diode D3, resistor R8, and capacitor R7. The anode of diode D3 is the input terminal of the charging indicator sampling module. The cathode of diode D3 is connected to the first terminal of resistor R8. The second terminal of resistor R8 is connected to the cathode and anode of capacitor C7. The anode of capacitor C7 is the output terminal of the charging indicator sampling module. Diode D3 limits the current direction, and resistor R8 and capacitor R7 provide voltage regulation, enabling the main controller to determine whether the DC power supply outputs 5V.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An ECAS height calibration aid based on TOF ranging, characterized in that, Comprise: Left front distance detection device, right front distance detection device, left rear distance detection device, right rear distance detection device and main controller; The car is parked on a support surface, the left front distance detection device is installed on the front axle of the car and close to the left front wheel position, the left front distance detection device is used to detect the distance from the position of the left front distance detection device to the support surface; The right front distance detection device is installed on the front axle of the car and close to the right front wheel position, the right front distance detection device is used to detect the distance from the position of the right front distance detection device to the support surface; The left rear distance detection device is installed on the rear axle of the car and close to the left rear wheel position, the left rear distance detection device is used to detect the distance from the position of the left rear distance sensor to the support surface; The right rear distance detection device is installed on the rear axle of the car and close to the right rear wheel position, the right rear distance detection device is used to detect the distance from the position of the right rear distance detection device to the support surface; The left front distance detection device, the right front distance detection device, the left rear distance detection device and the right rear distance detection device are all connected to the main controller.

2. The ECAS altitude calibration aid based on TOF ranging according to claim 1, characterized in that, Also include: The rechargeable power supply module supplies power to the left front distance detection device, the right front distance detection device, the left rear distance detection device, the right rear distance detection device and the main controller.

3. The ECAS altitude calibration aid based on TOF ranging according to claim 2, characterized in that, The rechargeable power supply module includes: a DC input power supply, a rechargeable battery, a voltage stabilizing power conversion module and a charging management module, the output end of the DC input power supply is connected to the input end of the charging management module, the output end of the charging management module is connected to the positive electrode of the rechargeable battery, the DC input power supply supplies power to the first input end of the voltage stabilizing power conversion module, the positive electrode of the rechargeable battery supplies power to the second input end of the voltage stabilizing power conversion module, the voltage stabilizing power conversion module is used to convert the output voltage of the DC input power supply or the output voltage of the rechargeable battery to a specified voltage value, and the voltage stabilizing power conversion module supplies power to the power supply end of the main controller.

4. The ECAS altitude calibration aid based on TOF ranging according to claim 3, characterized in that, The rechargeable power supply module further comprises a battery voltage sampling module and a charging indication sampling module, the input end of the battery voltage sampling module is connected to the positive electrode of the rechargeable battery, the output end of the battery voltage sampling module is connected to the first input end of the main controller, the output end of the DC input power supply is connected to the input end of the charging indication sampling module, and the output end of the charging indication sampling module is connected to the second input end of the main controller.

5. The ECAS altitude calibration aid based on TOF ranging according to claim 4, characterized in that, The rechargeable power supply module further comprises a control type power supply switching circuit, the output end of the DC input power supply and the positive electrode of the rechargeable battery are both connected to the voltage stabilizing power conversion module through the control type power supply switching circuit, the first input end of the control type power supply switching circuit is connected to the output end of the DC input power supply, the second input end of the control type power supply switching circuit is connected to the positive electrode of the rechargeable battery, the output end of the control type power supply switching circuit is connected to the input end of the voltage stabilizing power conversion module, and the control end of the control type power supply switching circuit is connected to the output end of the main controller.

6. The ECAS altitude calibration aid based on TOF ranging according to claim 5, characterized in that, The control type power supply switching circuit comprises a P-MOS transistor Q1, a diode D1 and a resistor R3, the gate of the P-MOS transistor Q1 is the first input end of the control type power supply switching circuit, the drain of the P-MOS transistor Q1 is the second input end of the control type power supply switching circuit, the first end of the resistor R3 is grounded, the second end of the resistor R3 is connected to the anode of the diode D1 and the gate of the P-MOS transistor Q1, and the cathode of the diode D1 is the output end of the control type power supply switching circuit.

7. The ECAS altitude calibration aid based on TOF ranging according to claim 6, characterized in that, The source of the P-MOS transistor Q1 is connected to the anode of the body diode, the drain of the P-MOS transistor Q1 is connected to the cathode of the body diode, when the direct current input power supply inputs a 5V voltage, the body diode limits the current flowing to the positive electrode of the rechargeable battery, thereby avoiding affecting the charging of the rechargeable battery.

8. The ECAS altitude calibration aid based on TOF ranging according to claim 7, characterized in that, The voltage stabilizing power supply conversion module comprises a capacitor C1, a capacitor C2 and a voltage reduction and voltage stabilization chip U1, the ground end of the voltage reduction and voltage stabilization chip U1, the negative electrode of the capacitor C1 and the negative electrode of the capacitor C2 are all grounded, the input end of the voltage reduction and voltage stabilization chip U1 is the voltage stabilizing power supply conversion module, the input end of the voltage reduction and voltage stabilization chip U1 is connected to the positive electrode of the capacitor C1, the output end of the voltage reduction and voltage stabilization chip U1 is connected to the positive electrode of the capacitor C2, and the output end of the voltage reduction and voltage stabilization chip U1 is the output end of the voltage stabilizing power supply conversion module.

9. The ECAS altitude calibration aid based on TOF ranging according to claim 8, characterized in that, The charging management module comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C4, a capacitor C5, a diode D2 and a charging management chip U2, the direct current input power supply output end is connected to the anode of the diode D2, the voltage input end VCC of the charging management chip U2 and the positive electrode of the capacitor C3, the cathode of the diode D2 is connected to the first end of the resistor R5, the second end of the resistor R5 is connected to the CHRG port of the charging management chip U2, the first end of the resistor R4 is connected to the PROG port of the charging management chip U2, the negative electrode of the capacitor C3, the second end of the resistor R4, the cathode of the capacitor C4, the cathode of the capacitor C3 and the cathode of the capacitor C5 are all grounded, the BAT end in the charging management chip U2 is connected to the positive electrode of the capacitor C5, and the BAT end in the charging management chip U2 is the output end of the charging management module.

10. The TOF ranging based ECAS altitude calibration aid device of claim 9, wherein, The battery voltage sampling module comprises a resistor R6, a resistor R7 and a capacitor C6, the positive electrode of the rechargeable battery is connected to the first end of the resistor R6, the first end of the resistor R6 is the input end of the battery voltage sampling module, the second end of the resistor R6 is connected to the first end of the resistor R7 and the anode of the capacitor C6, the second end of the resistor R7 and the cathode of the capacitor C6 are grounded, and the anode of the capacitor C6 is the output end of the battery voltage sampling module.

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