A road test system for pneumatic brake performance of semi-trailer

Abstract

The present invention provides a semi-trailer pneumatic brake performance road test system, a manual brake trigger module, a data acquisition module, a data operator and a data display; the manual brake trigger module is between the tractor and the trailer, and is connected in series in the control pipeline, the data acquisition module is connected to the data operator, and the data operator is connected to the data display. The pneumatic brake performance road test system of the present invention, in conjunction with the manual brake trigger module, the data acquisition module, the data operator and the data display, can realize the braking performance road test of trailer products of all pneumatic brake systems. The test system is powerful and has various applications, and can be expanded to be used for related tests such as the power performance and braking performance of automobiles and trains.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle pneumatic brake performance testing, and in particular relates to a semitrailer pneumatic brake performance road testing system. Background Art

[0002] Semi-trailers are an important part of the road drop-and-hook transport system. Due to the long body and large transport mass of trailers, their braking performance is one of the key factors affecting road traffic safety. Semi-trailers mostly use pneumatic brake systems, so the pneumatic brake performance of semi-trailers needs to be tested on the road. The United Nations Economic Commission for Europe Automobile Regulation ECE No. 13 and China's national mandatory standard GB12676 "Technical Requirements and Test Methods for Braking Systems of Commercial Vehicles and Trailers" both clearly stipulate the performance of the braking system of semi-trailers.

[0003] At present, the traditional semi-trailer road test system is composed of a vehicle-mounted five-wheel instrument and an optoelectronic data acquisition calculator. However, the road test system is large in size and inconvenient to carry and install. In addition, the subsequent data processing operation is cumbersome and time-consuming, which seriously affects the test efficiency of the road test.

[0004] Therefore, a new road test system that is easy to carry, simple to operate and highly efficient is urgently needed in the market. Summary of the invention

[0005] In view of this, the present invention aims to propose a semi-trailer pneumatic brake performance road test system to realize the braking performance road test of all trailer products with pneumatic brake systems. The test system is powerful and has diverse applications, and can be expanded to related tests such as power performance and braking performance of any vehicle.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A semitrailer pneumatic brake performance road test system comprises: a manually controlled brake trigger module, comprising a shuttle valve, a pressure gauge, and a pressure flow manual valve, wherein two air inlets of the shuttle valve are respectively used to connect a control pipeline and an air storage cylinder of a tractor, an air outlet of the shuttle valve is used to connect with an air inlet of the pressure gauge, an air outlet of the pressure gauge is used to connect with an air inlet of a pressure flow manual valve, and an air outlet of the pressure flow manual valve is used to be connected in series in a control pipeline and connected to a semitrailer; a data acquisition module, comprising an air pressure sensor and a GPS collector, respectively used to collect air pressure signals and vehicle speed signals of the semitrailer; a data operator, connected to the data acquisition module by signal, receiving air pressure signals and vehicle speed signals and performing calculations; and a data display, connected to the data operator by signal, used to display data.

[0008] Furthermore, a first control switch is provided on the data channel connecting the data operator and the signal output end of the air pressure sensor, and a second control switch is provided on the data channel connecting the data operator and the signal output end of the GPS collector.

[0009] Furthermore, the data operator selects DEWE-43A data collector, which is connected to the signal output end of the air pressure sensor through an analog channel, connected to the signal output end of the GPS collector through a CAN channel, and connected to a data display through a USB channel.

[0010] Furthermore, the data display is a tablet computer.

[0011] Furthermore, during the test, the data operator and the data display are fixed on the upper part of the dashboard of the cab, the air pressure sensor is fixed on the air reservoir and the brake air chamber, and the GPS antenna receiver of the GPS collector is fixed on the top of the vehicle.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) The pneumatic brake performance road test system of the present invention, in combination with a manual brake trigger module, a data acquisition module, a data operator and a data display, can realize the brake performance road test of all trailer products with pneumatic brake systems.

[0014] (2) The test system is powerful and has a variety of applications. It can be expanded to test items such as the power performance and braking performance of automobiles and trains, as well as the power performance, sliding performance, maximum speed performance and steep slope climbing performance of other vehicles. At the same time, the test results can be processed conveniently and quickly, and it is easy to operate, disassemble and carry, which can effectively improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 The figure is a test principle block diagram of the test system described in the embodiment of the present invention.

[0017] Description of reference numerals:

[0018] 1- shuttle valve; 11- pressure gauge; 12- air pressure flow manual valve; 2- air pressure signal; 21- air pressure sensor; 22- analog channel; 23- first control switch; 3- vehicle speed signal; 31- GPS collector; 32- CAN channel; 33- second control switch; 4- data operator; 5- USB channel; 6- data display. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] A semi-trailer pneumatic brake performance road test system, such as Figure 1 As shown, it includes a manual braking trigger module, a data acquisition module, a data operator 4 and a data display 6.

[0024] The manual brake trigger module is located between the tractor and the tested trailer and is connected in series in the control pipeline; specifically, the manual brake trigger module includes a shuttle valve 1, a pressure gauge 11, and a pressure flow manual valve 12. The two air inlets of the shuttle valve 1 are respectively used to connect the control pipeline and the air storage cylinder of the tractor, the air outlet of the shuttle valve 1 is used to connect with the air inlet of the pressure gauge 11, the air outlet of the pressure gauge 11 is used to connect with the air inlet of the pressure flow manual valve 12, and the air outlet of the pressure flow manual valve 12 is used to be connected in series in the control pipeline and connected to the semi-trailer;

[0025] The data acquisition module includes an air pressure sensor 21 and a GPS collector 31, which are respectively used to collect the air pressure signal and the vehicle speed signal of the semi-trailer; the data operator 4 is connected to the data acquisition module signal, receives the air pressure signal and the vehicle speed signal and performs calculations; the data display 6 is a tablet computer, which is connected to the data operator 4 signal and is used for data display.

[0026] A first control switch 23 is provided on the data channel connecting the data operator 4 with the signal output end of the air pressure sensor 21 , and a second control switch 33 is provided on the data channel connecting the data operator 4 with the signal output end of the GPS collector 31 .

[0027] The new semi-trailer pneumatic brake performance road test system tested in this embodiment requires a total of 1 shuttle valve 1, 1 air pressure gauge 11, 1 manual flow control valve 12, 12 air pressure sensors 21, 1 GPS collector 31, 1 data operator 4, a data display 6, 12 related power and signal connection lines, and several air pressure pipelines. All equipment can be placed in a 800×600×250mm movable pull rod tool box, which takes up little space and is easy to carry.

[0028] During the test, the data operator 4 and the data display 6 are fixed on the upper part of the dashboard of the cab, the air pressure sensor 21 is fixed on the air reservoir and the brake air chamber, and the GPS antenna receiver of the GPS collector 31 is fixed on the top of the vehicle.

[0029] In the practical application of the present invention, the manual brake trigger module is used to manually trigger the brake signal to brake the semi-trailer separately; the shuttle valve 1 takes air from the control pipeline and the air tank of the tractor respectively, the barometer 11 displays the air pressure value passing through, and the air pressure flow manual valve 12 controls the opening size of the air pressure flow valve; the data acquisition module is used to collect the air pressure signal 2 and the vehicle speed signal 3, and is connected to the data operator 4; the air pressure sensor 21 provided in the air tank and the brake air chamber processes the received air pressure data and is connected to the data operator 4; the GPS collector 31 provided on the top of the vehicle processes the received GPS data and is connected to the data operator 4; the data operator 4 is used to collect and process the air pressure signal 2 sent by the air pressure sensor 21 and the vehicle speed signal 3 sent by the GPS collector 31, and is connected to the data display 6. The processing software of the data display 6 displays the data and finally obtains the trailer braking performance test result.

[0030] In order to realize efficient and convenient data collection and data operation and analysis and unified integrated data processing, the data operator 4 of the test system uses the DEWE-43A data collector for data integration and operation processing, which belongs to conventional technology. The DEWE-43A data collector is a modular data acquisition and signal analysis instrument, which is equipped with analog input / output channels, digital input / output channels, CAN bus channels, USB channels, etc., collects and analyzes all test transmission signals, and transmits them to the data display 6 in real time and stores them. The instrument is compact, small and flexible. The DEWE-43A data collector is connected to the signal output end of the air pressure sensor 21 through the analog channel 22, connected to the signal output end of the GPS collector 31 through the CAN channel 32, and connected to the data display 6 through the USB channel 5.

[0031] In practical applications, this embodiment is not limited to the data acquisition and signal analyzer DEWE-43A. For example, a test system based on GPS signals and a non-contact speed measurement system based on photoelectric principles and a multi-expansion analog channel and digital channel signal test system can all be applied here.

[0032] The data display 6 uses a Microsoft Surface tablet computer, which has the characteristics of long battery life, small size, easy to carry, simple and fast operation, etc. The Surface tablet computer is connected to the data operator 4 via a USB bus serial interface. The professional DEWESOFT X post-processing software installed on the tablet computer processes the signal sent by the data operator 4 in real time, which is a conventional method.

[0033] Embodiment 1: Turn on the first control switch 23 and turn on the second control switch 33. At this time, the semi-trailer braking performance road test system can perform a braking test on the semi-trailer. The test vehicle is tested in accordance with the test method and test procedures specified in the standard GB12676. When the vehicle is at a specified speed, adjust the manual flow control valve 12 to an appropriate position, operate the shuttle valve 1, and brake the semi-trailer alone to a stop. During this period, the data operator 4 integrates and comprehensively calculates the air pressure data sent by the air pressure sensor 21 and the vehicle speed signal sent by the GPS collector 31, and transmits the results of the braking test, such as braking speed, braking distance, braking deceleration, brake line pressure, and air tank pressure change, to the data display 6 for storage and reading and analysis.

[0034] Embodiment 2: The first control switch 23 is turned off, and the second control switch 33 is turned on. The driver drives the vehicle to perform the test according to GB / T12543 "Automobile Acceleration Performance Test Method". At this time, the GPS collector 31 sends the vehicle speed signal to the data operator 4, and the measured values ​​such as speed and time are displayed on the data display 6, completing the dynamic performance test of the vehicle train. In this implementation, the road test of the vehicle sliding (GB / T 12536) performance, the maximum vehicle speed (GB / T 12536) performance and the steep slope climbing (GB / T 12539) performance can also be expanded.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A semi-trailer pneumatic brake performance road test system, characterized in that include: A manual brake trigger module comprises a shuttle valve (1), a pressure gauge (11), and a pressure flow manual control valve (12); the two air inlets of the shuttle valve (1) are respectively used to connect the control pipeline and the air storage cylinder of the tractor; the air outlet of the shuttle valve (1) is used to connect with the air inlet of the pressure gauge (11); the air outlet of the pressure gauge (11) is used to connect with the air inlet of the pressure flow manual control valve (12); and the air outlet of the pressure flow manual control valve (12) is used to be connected in series in the control pipeline and connected to the semi-trailer; The data acquisition module includes an air pressure sensor (21) and a GPS collector (31), which are used to collect air pressure signals and vehicle speed signals of the semi-trailer respectively; A data operator (4) is connected to the data acquisition module signal, receives the air pressure signal and the vehicle speed signal and performs calculations; A data display (6) is connected to the data operator (4) by signal and is used for data display; A first control switch (23) is provided on a data channel connecting the data operator (4) and the signal output end of the air pressure sensor (21), and a second control switch (33) is provided on a data channel connecting the data operator (4) and the signal output end of the GPS collector (31); The data operator (4) is a DEWE-43A data collector, connected to the signal output end of the air pressure sensor (21) through an analog channel (22), connected to the signal output end of the GPS collector (31) through a CAN channel (32), and connected to a data display (6) through a USB channel (5); During the test, the data operator (4) and the data display (6) are fixed on the upper part of the dashboard of the cab, the air pressure sensor (21) is fixed on the air reservoir and the brake air chamber, and the GPS antenna receiver of the GPS collector (31) is fixed on the top of the vehicle.

2. A semi-trailer pneumatic brake performance road test system according to claim 1, characterized in that: The data display (6) is a tablet computer.

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