CN218297594U - Vehicle dynamic braking performance tester - Google Patents

Abstract

The utility model discloses a vehicle dynamic braking capability test appearance, it includes: the MCU is used for processing and storing data output by each sensor; the pedal force sensor is arranged on a vehicle brake pedal, is in communication connection with the MCU through a cable and is used for calculating a numerical value of applied pedal force when the vehicle brakes; the gyroscope and the GPS sensor are in communication connection with the MCU through an interface circuit, and the gyroscope is used for acquiring vehicle acceleration and angle information; the GPS sensor is used for providing real-time high-precision vehicle positioning information and realizing GPS vehicle speed measurement; and the display screen is electrically connected with the MCU and is used for numerical value display and interface operation. The utility model provides a single axis type acceleration sensor easily receive the instrument installation angle influence and produce the error among the prior art, to the technical problem that the test result produced the influence, applicable again in judicial appraisal application and satisfy the demand of appraisal management.

Description

Vehicle dynamic braking performance tester

Technical Field

The utility model relates to an automobile inspection field, concretely relates to vehicle dynamic braking capability test appearance.

Background

In the technical field of judicial identification, dynamic inspection needs to be carried out on accident-involved vehicles, the braking performance of the accident-involved vehicles, including braking distance, braking coordination time, MFDD and the like, is detected, and based on the dynamic inspection, the braking performance of the vehicles is preliminarily judged, and accident causes are analyzed. The detection of the braking performance of the vehicle mainly depends on a vehicle braking performance detector, the vehicle braking performance detector is required to have good speed and acceleration response characteristics, and the braking distance from braking to stopping, the braking coordination time and the like of the vehicle can be accurately calculated. However, the displacement and speed of the vehicle calculated by the acceleration sensor only cause errors in the calculated data due to the installation of the instrument, and influence the test result.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model provides a vehicle dynamic braking capability test appearance, the technical problem that solve are that single-axis type acceleration sensor easily receives the instrument installation angle influence and produces the error, produces the influence to the test result.

The adopted technical scheme is as follows:

a vehicle dynamic braking performance tester, comprising:

the MCU is used for processing and storing data output by each sensor;

the pedal force sensor is arranged on a vehicle brake pedal, is in communication connection with the MCU through a cable, and is used for calculating a numerical value of applied pedal force when the vehicle brakes;

the gyroscope and the GPS sensor are in communication connection with the MCU through an interface circuit, and the gyroscope is used for acquiring vehicle acceleration and angle information; the GPS sensor is used for providing real-time high-precision vehicle positioning information and realizing GPS vehicle speed measurement;

and the display screen is electrically connected with the MCU and is used for numerical value display and interface operation.

Further, the GPS sensor is a GPS module using 20 Hz.

Furthermore, the display screen is an LED liquid crystal display module.

Further, the vehicle dynamic braking performance tester further comprises:

and the SD memory card is electrically connected with the MCU and used for storing test data.

Further, the vehicle dynamic braking performance tester further comprises:

and the wireless external printing module is electrically connected with the MCU and used for printing the test report.

Further, the vehicle dynamic braking performance tester further comprises:

and the built-in battery is electrically connected with the MCU and used for supplying power.

The beneficial effects of the utility model reside in that:

the utility model discloses a vehicle dynamic braking capability tester is owing to introduce gyroscope and GPS sensor, thereby required speed and displacement can be calculated through the acceleration integral of gyroscope and the locating information two kinds of modes of GPS sensor and obtain, can check up the output result between two sets of data, guarantee the accuracy of data, simultaneously because integrated GPS sensor can additionally export GPS time service and vehicle orbit curve, carry out the accurate record to information such as check-out time, detection site, testing result, satisfy the requirement of appraisal management better; therefore, the technical problems that the single-axis acceleration sensor in the prior art is easily influenced by the installation angle of the instrument to generate errors and influence a test result are solved, and the method is applicable to judicial identification application and meets the requirements of identification management.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a vehicle dynamic braking performance tester according to embodiment 1.

Fig. 2 is a schematic structural diagram of a vehicle dynamic braking performance tester according to embodiment 2.

Fig. 3 is a schematic structural diagram of a vehicle dynamic braking performance tester according to embodiment 3.

Fig. 4 is a schematic structural diagram of a vehicle dynamic braking performance tester according to embodiment 4.

The mark in the figure is:

1. MCU; 2. a pedal force sensor; 3. a display screen; 4. a gyroscope; 5. a GPS sensor; 6. an interface circuit; 7. an SD memory card; 8. a wireless external printing module; 9. a battery is built in.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, the vehicle dynamic braking performance tester includes an MCU1, a pedal force sensor 2, a display screen 3, a gyroscope 4, and a GPS sensor 5.

The MCU1 is used for processing and storing data output by each sensor; the sensors include a pedal force sensor, a gyroscope, and a GPS sensor. MCU is little the control unit, can adopt the STM singlechip.

And the pedal force sensor 2 is arranged on a brake pedal of the vehicle, is in communication connection with the MCU1 through a cable, and is used for calculating a numerical value of applied pedal force when the vehicle brakes.

The gyroscope 4 and the GPS sensor 5 are in communication connection with the MCU1 through an interface circuit 6, the gyroscope is provided with 3 axial sensors and 6 parameter sensors, can output high-precision acceleration, angular velocity and angle information in real time, and is mainly used for collecting the acceleration and angle information of the vehicle. The GPS sensor is used for providing real-time high-precision vehicle positioning information and realizing GPS vehicle speed measurement. The GPS sensor may preferably employ a 20Hz GPS module.

And the display screen 3 is electrically connected with the MCU1 and is used for numerical value display and interface operation. The display screen can be preferably an LED liquid crystal display module, and further can be a 7-inch touch RGB liquid crystal display screen.

During the use, the pedal force sensor passes through the bolt and installs on vehicle brake pedal, and this vehicle dynamic braking performance tester passes through the sucking disc to be fixed at vehicle cockpit front portion, and the antenna head of GPS sensor is fixed to be placed outside the car, and the intercommunication power inputs vehicle information through LED liquid crystal display module to the test item of selection is experimental, and accessible LED liquid crystal display module shows the test result. The brake performance tester can further increase the test items such as the highest vehicle speed, the friction coefficient, the sliding test and the like besides the test items of the brake performance.

The dynamic braking performance tester of the vehicle is introduced with the gyroscope and the GPS sensor which are used as acquisition elements, and the error caused by the installation of the tester is avoided by acquiring three axial accelerations, three axial angular velocities and GPS positioning information, so that the required speed and displacement can be calculated by two modes of acceleration integral of the gyroscope and positioning information of the GPS sensor, an output result can be verified between two groups of data, and the accuracy of the data is ensured; therefore, the technical problems that the single-axis acceleration sensor in the prior art is easily influenced by the installation angle of the instrument to generate errors and influence a test result are solved, and the method is applicable to judicial identification application and meets the requirements of identification management.

Example 2

Referring to embodiment 1, on the basis of embodiment 1, referring to fig. 2, the vehicle dynamic braking performance tester of this embodiment further includes: and the SD memory card 7 is electrically connected with the MCU1 and is used for storing test data. Thus, after the test or the test is finished, the stored test data can be operated off line through the SD memory card 7.

Example 3

Referring to embodiment 2, on the basis of embodiment 2, referring to fig. 3, the vehicle dynamic braking performance tester of this embodiment further includes: and the wireless external printing module 8 is electrically connected with the MCU1 and is used for printing a test report. Therefore, after the test or the test is finished, the test report can be printed through the wireless external printing module, and the stored test data can be printed through offline operation of the SD memory card 7.

Example 4

Referring to embodiment 2, on the basis of embodiment 2, referring to fig. 4, the vehicle dynamic braking performance tester of this embodiment further includes: and the built-in battery 9 is electrically connected with the MCU1 and used for supplying power, namely used for supplying power for the whole vehicle dynamic braking performance tester, including supplying power for each module in the whole vehicle dynamic braking performance tester. With the built-in battery, the vehicle dynamic braking performance tester can work by the power supply of the built-in battery without being connected with a vehicle-mounted power supply.

The vehicle dynamic braking performance tester of this embodiment is on the basis of guaranteeing the function, integrates each part of figure 4 in vehicle dynamic braking performance tester, optimizes the volume, reduces the volume, portable.

The above detailed description is only for the purpose of illustrating the practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A vehicle dynamic braking performance tester is characterized by comprising:

the MCU is used for processing and storing data output by each sensor;

the pedal force sensor is arranged on a vehicle brake pedal, is in communication connection with the MCU through a cable and is used for calculating a numerical value of applied pedal force when the vehicle brakes;

the gyroscope and the GPS sensor are in communication connection with the MCU through an interface circuit, and the gyroscope is used for acquiring vehicle acceleration and angle information; the GPS sensor is used for providing real-time high-precision vehicle positioning information and realizing GPS vehicle speed measurement;

and the display screen is electrically connected with the MCU and is used for numerical value display and interface operation.

2. The vehicle dynamic braking performance tester of claim 1, wherein the GPS sensor is a GPS module using 20 Hz.

3. The vehicle dynamic braking performance tester according to claim 1, wherein the display screen is an LED liquid crystal display module.

4. The vehicle dynamic braking performance tester according to claim 1, further comprising:

and the SD memory card is electrically connected with the MCU and used for storing test data.

5. The vehicle dynamic braking performance tester of claim 1, further comprising:

and the wireless external printing module is electrically connected with the MCU and used for printing the test report.

6. The vehicle dynamic braking performance tester of claim 1, further comprising:

and the built-in battery is electrically connected with the MCU and used for supplying power.

Images