A power protection device of a vehicle-mounted driving test host

Abstract

The utility model provides a kind of power protection device of vehicle-mounted driving test host, belong to driving test technical field, including power input and power output, parallelly connected between the power input and power output is provided with storage circuit, the super farad capacitor is connected in series on the storage circuit;Power input is energized, storage circuit uses the feature of super farad capacitor to store electricity, power output is used as power terminal, when power input stops power supply or circuit breaking for a short time, super farad capacitor discharges quickly, maintains the voltage stability of power output.

Description

Technical Field

[0001] This utility model relates to the field of clutch technology, and more specifically, to a power protection device for an on-board driver's test host. Background Technology

[0002] Among them, the on-site driving skills test and the road driving skills and safe and civilized driving knowledge test require driving a vehicle on the road. The current vehicle-mounted driving test host integrates industrial control tablet, audio and video acquisition, vehicle signal acquisition, RTK positioning and LED warning lights, etc. The overall power of the equipment reaches 40-60W. Because a lot of current is consumed when the car is started, the voltage of the vehicle-mounted driving test host needs to be maintained at this time. The voltage of the test vehicle's battery will be pulled down to 9V. Such voltage and current supply to the vehicle-mounted driving test host may cause some devices in the driving test host to malfunction, such as industrial control computer screen flickering, RTK differential instability, audio and video stuttering, network packet loss, etc.

[0003] To address these issues, a reverse polarity protection diode is typically added in parallel to the rear of the original test vehicle's battery, along with the battery itself and a wide-voltage input voltage regulator module added to the front of the driving test host system. This ensures that the entire driving test host system operates normally without being affected when the test vehicle is started. However, due to limited space for equipment installation in test vehicles and the relatively low power generation capacity of some models, there are problems such as inconvenient battery installation, difficulty in ensuring the battery is charged, and risks associated with adding a battery.

[0004] Therefore, there is an urgent need for a device that can ensure the normal operation of the on-board driving test host during the driving test process. Utility Model Content

[0005] In view of this, this utility model proposes a device that uses a supercapacitor to store charge and integrates peripheral circuits such as a first diode, a current-limiting resistor, and a switch. When the voltage and current of the vehicle battery fluctuate due to ignition or other reasons during driving tests, this device can stabilize the voltage and current output and ensure the stable operation of the driving test host.

[0006] The technical solution of this utility model is implemented as follows: a power protection device for a vehicle-mounted driving test host includes a power input terminal and a power output terminal, wherein a storage circuit is connected in parallel between the power input terminal and the power output terminal, and a supercapacitor is connected in series in the storage circuit.

[0007] Based on the above technical solutions, preferably, a warning circuit is also connected in parallel between the energy storage circuit and the power output terminal, and an LED light is connected to the warning circuit.

[0008] Based on the above technical solutions, preferably, a switch SW is provided between the energy storage circuit and the warning circuit.

[0009] Based on the above technical solutions, preferably, the power input terminal is electrically connected to a vehicle battery. The power input terminal includes a main input terminal and a secondary input terminal. The vehicle battery is provided with a first terminal and a second terminal. The main input terminal is electrically connected to the first terminal, and the secondary input terminal is electrically connected to the second terminal.

[0010] Based on the above technical solutions, preferably, a first diode is also provided on the main input terminal.

[0011] Based on the above technical solution, preferably, the energy storage circuit is further connected in series with a resistor R and a second diode. The resistor R32 is close to the main input terminal, and the second diode is connected in parallel with the resistor R. The diode is close to the switch SW.

[0012] Based on the above technical solutions, preferably, the power output terminal is electrically connected to the driving test host, the power output terminal includes a main output terminal and a secondary output terminal, the driving test host is provided with a third terminal and a fourth terminal, the main output terminal is electrically connected to the third terminal, and the secondary output terminal is electrically connected to the fourth terminal.

[0013] Based on the above technical solutions, preferably, the system also includes a housing, in which the energy storage circuit, the warning circuit, and the switch SW are all housed.

[0014] Based on the above technical solutions, preferably, one end of the power input terminal extends into the housing and is electrically connected to the energy storage circuit, and one end of the power output terminal extends into the housing and is electrically connected to the warning circuit.

[0015] The power protection device for a vehicle-mounted driver's license test host of this utility model has the following advantages over the prior art: After the power input terminal is powered on, the energy storage circuit uses the characteristics of supercapacitors to store energy. The power output terminal is the power consumption terminal. When the power input terminal stops supplying power for a short time or is disconnected, the supercapacitors discharge rapidly to maintain the voltage stability of the power output terminal. 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 a power protection device for a vehicle-mounted driver's license test host according to the present invention. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 As shown, a power protection device for a vehicle-mounted driving test host includes a power input terminal 1 and a power output terminal 2. A storage circuit 3 is connected in parallel between the power input terminal 1 and the power output terminal 2, and a supercapacitor 31 is connected in series in the storage circuit 3. The supercapacitor has specifications of 16V and 8.3F. Using the formula Farad = Ampere-hour * 3600 / Voltage, it is converted to 0.037AH, which can power the driving test host for 15-20 seconds of normal operation. Normal ignition typically takes 2 seconds. After the power input terminal 1 is powered on, the storage circuit 3 utilizes the characteristics of the supercapacitor 31 to store electricity. The power output terminal 2 serves as the power consumption terminal. When the power input terminal 1 experiences a short-term power outage or a circuit break, the supercapacitor 31 discharges rapidly, maintaining the voltage stability of the power output terminal 2.

[0020] An alarm circuit 5 is also connected in parallel between the energy storage circuit 3 and the power output terminal 2. An LED light 51 is connected to the power supply circuit 5. The LED light 51 is used to display the status of the power input terminal, allowing for a more intuitive view of the circuit's continuity.

[0021] A switch SW6 is provided between the energy storage circuit 3 and the warning circuit 5. When the switch SW6 is open, the supercapacitor 31 is charged.

[0022] The power input terminal 1 is electrically connected to the vehicle battery 4. The power input terminal 1 includes a main input terminal 11 and a secondary input terminal 12. The vehicle battery 4 is provided with a first terminal 41 and a second terminal 42. The main input terminal 11 is electrically connected to the first terminal 41, and the secondary input terminal 12 is electrically connected to the second terminal 42.

[0023] A first diode 8 is also provided on the main input terminal 11. The first diode 8 is a Schottky diode, which serves as a reverse protection and rectification function. A resistor R32 and a second diode 9 are connected in series on the energy storage circuit 3. The resistor R32 is close to the main input terminal 11, and the second diode 9 is connected in parallel with the resistor R32, with the diode close to the switch SW6. The resistor R32 is a high-power current-limiting resistor to protect the subsequent circuits; the second diode 9 is a Schottky diode, which serves as a voltage output clamping function to ensure that the voltage drop when the output voltage passes through the resistor R32 is not affected by the current magnitude.

[0024] The power output terminal 2 is electrically connected to the driving test host 7. The power output terminal 2 includes a main output terminal 21 and a secondary output terminal 22. The driving test host 7 is provided with a third terminal 71 and a fourth terminal 72. The main output terminal 21 is electrically connected to the third terminal 71, and the secondary output terminal 22 is electrically connected to the fourth terminal 72.

[0025] It also includes a housing, in which the energy storage circuit 3, the warning circuit 5 and the switch SW6 are all housed. The housing can protect the entire device, preventing external influences from causing short circuits or open circuits in the entire circuit, which would affect the performance and reliability of the device. It can also provide waterproofing.

[0026] One end of the power input terminal 1 extends into the housing and is electrically connected to the energy storage circuit 3, and one end of the power output terminal 2 extends into the housing and is electrically connected to the warning circuit 5.

[0027] When the vehicle power is turned on, the device is in charging mode. The vehicle battery 4 first rectifies through the first diode 8, and after protection by resistor R32, it supplies power to the supercapacitor 31. The supercapacitor 31 has a capacity of only 0.037AH, while the vehicle battery 4 typically has a capacity of 48-60AH. Charging the supercapacitor 31 will not affect the operation of the vehicle battery 4. Furthermore, after the supercapacitor 31 is fully charged, the energy storage circuit 3 is essentially in an open circuit state. At this time, the switch SW6 is in the open state, which means that the entire device is in an open circuit state.

[0028] When switch SW6 is closed, the vehicle battery 4 supplies power to the driving test host 7, and the driving test host 7 begins to work. At this time, the supercapacitor 31 is fully charged, and the energy storage circuit 3 is essentially in an open circuit state. This means that the vehicle battery 4 supplies power to the driving test host 7 after rectification by the first diode 8, and the driving test host 7 is now working normally.

[0029] When the test vehicle is started, the starter motor consumes a lot of current, and the driving test host 7 also consumes a lot of current. At this time, the supply voltage of the vehicle battery 4 drops to 9V. The voltage of the supercapacitor 31 is higher than the output voltage of the vehicle battery 4. The supercapacitor 31 starts to discharge to stabilize the voltage and current. Due to the reverse protection effect of the first diode 8, the discharge current is output in one direction, which only maintains the operation of the driving test host 7. At this time, the driving test host 7 is working normally.

[0030] The vehicle ignition time is generally 2 seconds. Once the ignition is complete, the onboard alternator starts working, the voltage of the onboard battery 4 is restored, and the driving test host 7 is powered by the onboard battery 4. After the supercapacitor 31 is fully charged, its branch is disconnected, waiting for the next voltage fluctuation to discharge and stabilize the voltage and current.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power protection device for a vehicle-mounted driving test host, comprising a power input terminal (1) and a power output terminal (2), characterized in that: A power storage circuit (3) is connected in parallel between the power input terminal (1) and the power output terminal (2), and a supercapacitor (31) is connected in series on the power storage circuit (3).

2. The power protection device for an on-board driver's license test host as described in claim 1, characterized in that: An alarm circuit (5) is also connected in parallel between the energy storage circuit (3) and the power output terminal (2), and an LED light (51) is connected to the alarm circuit (5).

3. The power protection device for an on-board driver's license test host as described in claim 2, characterized in that: A switch SW (6) is provided between the energy storage circuit (3) and the warning circuit (5).

4. The power protection device for an on-board driver's license test host as described in claim 2, characterized in that: The power input terminal (1) is electrically connected to the vehicle battery (4). The power input terminal (1) includes a main input terminal (11) and a secondary input terminal (12). The vehicle battery (4) is provided with a first terminal (41) and a second terminal (42). The main input terminal (11) is electrically connected to the first terminal (41), and the secondary input terminal (12) is electrically connected to the second terminal (42).

5. The power protection device for an on-board driver's license test host as described in claim 4, characterized in that: A first diode (8) is also provided on the main input terminal (11).

6. The power protection device for an on-board driver's license test host as described in claim 4, characterized in that: The energy storage circuit (3) is also connected in series with a resistor R (32) and a second diode (9). The resistor R (32) is close to the main input terminal (11), and the second diode (9) is connected in parallel with the resistor R (32). The diode is close to the switch SW (6).

7. The power protection device for an on-board driver's license test host as described in claim 1, characterized in that: The power output terminal (2) is electrically connected to the driving test host (7). The power output terminal (2) includes a main output terminal (21) and a secondary output terminal (22). The driving test host (7) is provided with a third terminal (71) and a fourth terminal (72). The main output terminal (21) is electrically connected to the third terminal (71), and the secondary output terminal (22) is electrically connected to the fourth terminal (72).

8. The power protection device for an on-board driver's license test host as described in claim 3, characterized in that: It also includes a housing, and the energy storage circuit (3), warning circuit (5) and switch SW (6) are all located inside the housing.

9. The power protection device for an on-board driver's license test host as described in claim 3, characterized in that: One end of the power input terminal (1) extends into the housing and is electrically connected to the energy storage circuit (3), and one end of the power output terminal (2) extends into the housing and is electrically connected to the warning circuit (5).

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