WO2022062730A1 - Rail vehicle collision test system - Google Patents

Abstract

A rail vehicle collision test system, comprising: a sensor connecting plate (10), a force measuring sensor group (20), a data acquisition system (30), and a control system (40). Each force measuring sensor in the force measuring sensor group (20) is mounted on a mounting hole of the sensor connecting plate (10) and is connected to a hardware channel of the data acquisition system (30); a sensor ID chip is provided in each force measuring sensor and is used for storing a sensor coefficient and a sensor number; the data acquisition system (30) obtains, by means of each hardware channel, a voltage signal outputted by each force measuring sensor in a rail vehicle collision test and amplifies the voltage signal to obtain a target voltage signal; the control system (40) determines, according to each target voltage signal, a target sensor number of the force measuring sensor corresponding to the corresponding hardware channel and determines, according to a corresponding relation between the sensor number and the sensor coefficient, a sensor coefficient corresponding to each target sensor number. Therefore, manual participation is not required for determination and recording of each sensor coefficient in the test.

Description

A rail vehicle crash test system technical field

This application claims the priority of the domestic application with the application number 202011022307.3 and the invention titled "A Crash Test System for Rail Vehicles" filed with the China Patent Office on September 25, 2020, the entire contents of which are incorporated into this application by reference.

Background technique

In order to protect the life safety of train members and avoid train collision accidents, the development of crash-resistant energy-absorbing trains has become the most important research direction in the world. In the process of train crash safety development test, in order to study and improve the crashworthiness of the vehicle body, it is necessary to measure the impact force distribution when the vehicle collides, so as to analyze the structure and stress condition of the impact part, so as to design the safety train body and improve the Optimizing the body structure provides a test basis.

At present, the rail vehicle crash test system is usually used to study the collision accident and to evaluate the safety of the energy-absorbing vehicle body. In the existing solution, the layout of each load cell in the rail vehicle crash test system needs to be adjusted accordingly according to different crash test requirements. However, due to the large number of load cells, the traditional technology cannot accurately and conveniently realize the hardware channel setting of load cells to adjust the system parameters. Therefore, a large amount of manual participation is usually required, and the layout of each crash test is determined and entered manually. The sensor coefficients of each load cell not only lead to low work efficiency, but also prone to incorrect system parameter settings.

SUMMARY OF THE INVENTION

In view of this, the present invention discloses a rail vehicle crash test system, so as to realize the self-identification function of the rail vehicle crash test system, and it is not necessary to manually determine and enter the sensor coefficients of each load cell arranged in each crash test, so as not only to Improve work efficiency and effectively avoid system parameter setting errors.

A rail vehicle crash test system, comprising: a sensor connection board, a force measuring sensor group, a data acquisition system and a control system;

The sensor connecting plate is provided with mounting holes;

The load cell group includes: N load cells, each of the load cells is installed on one of the mounting holes of the sensor connection board, and all the load cells installed on the sensor connection board The sensor forms a rail vehicle collision wall, wherein each of the load cells has a sensor ID chip, and the sensor ID chip stores a sensor coefficient and a sensor number representing a unique identification, and the sensor coefficient is used to represent the voltage value and the sensor force. The corresponding relationship of the value, N is a positive integer;

The number of hardware channels that the data acquisition system has is not less than the number of the load cells, each of the load cells is connected to one of the hardware channels, and the data acquisition system acquires through each of the hardware channels the voltage signal output by the corresponding load cell during the collision test of the rail vehicle, amplify the voltage signal to obtain a target voltage signal, and store the target voltage signal;

The control system obtains each of the target voltage signals from the data acquisition system, and determines the sensor number of the corresponding load cell based on the hardware channel corresponding to each of the target voltage signals, and records it as the target sensor number, from In the pre-stored correspondence between sensor numbers and sensor coefficients, the sensor coefficients corresponding to each of the target sensor numbers are determined.

Optionally, the data acquisition system includes: a master and multiple slaves, the master is connected to each of the slaves, the master generates a synchronous clock signal, and sends the synchronous clock signal to each of the slaves. The slave machine realizes the synchronization signal acquisition of the master machine and each of the slave machines.

Optionally, the host and each of the slaves are connected by synchronous optical fibers.

Optionally, the host and each slave include: an amplifier and a collector, and the amplifier and the collector are integrated to form a chassis;

The amplifier is used to amplify the voltage signal output by the load cell during the rail vehicle collision test to obtain the target voltage signal;

The collector is used for collecting and storing the target voltage signal.

Optionally, the host is configured with 2 acquisition cards with 16 hardware channels, which can realize the continuous acquisition of voltage signals of all 32 hardware channels;

Each of the slaves is configured with 3 acquisition cards with 16 hardware channels and 1 acquisition card with 8 hardware channels, which can realize the continuous acquisition of voltage signals of all 56 hardware channels.

Optionally, the control system includes: a switch and a host computer, the host computer is connected to the data acquisition system through the switch, and the host computer is used to obtain each target from the data acquisition system through the switch. voltage signal, and determine the sensor number of the corresponding load cell based on the hardware channel corresponding to each of the target voltage signals, and record it as the target sensor number. a sensor coefficient corresponding to the target sensor number.

Optionally, the upper computer is connected to the data acquisition system through the switch via Gigabit Ethernet.

Optionally, the data acquisition system is connected to the force measuring sensor group through a collection cable, and the collection cable is installed on the installation hole of the sensor connection plate.

Optionally, the data acquisition system is internally loaded with a solid-state hard disk, and the target voltage signal is stored through the solid-state hard disk.

As can be seen from the above technical solutions, the present invention discloses a rail vehicle crash test system, comprising: a sensor connection board, a force sensor group, a data acquisition system and a control system, each force sensor in the force sensor group is installed in a On one mounting hole of the sensor connection board, all load cells mounted on the sensor connection board form a rail vehicle collision wall. The present invention stores sensor coefficients and uniquely identified sensors by arranging a sensor ID chip in each load cell. number, and connect each load cell with a hardware channel of the data acquisition system. The data acquisition system obtains the voltage signal output by the corresponding load cell during the rail vehicle crash test through each hardware channel, and conducts the voltage signal analysis. Amplify the target voltage signal. During the collision test of the rail vehicle, the control system determines the target sensor number of the load cell corresponding to the corresponding hardware channel according to each target voltage signal stored in the data acquisition system, and selects the sensor number from the pre-stored sensor. In the corresponding relationship between the number and the sensor coefficient, the sensor coefficient corresponding to each target sensor number is determined. Compared with the traditional solution, the present invention realizes the self-identification function of the rail vehicle crash test system, and does not need to manually determine and input the sensor coefficients of each force measuring sensor laid out in each crash test, thereby not only improving the work efficiency, but also effectively avoiding The system parameter setting is wrong.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the disclosed drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a rail vehicle crash test system disclosed in an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiment of the present invention discloses a disclosed crash test system for rail vehicles, comprising: a sensor connection board, a force measurement sensor group, a data acquisition system and a control system, and each force measurement sensor in the force measurement sensor group is installed on the sensor connection board On one of the mounting holes, all the load cells installed on the sensor connection board form the collision wall of the rail vehicle. The present invention stores the sensor coefficient and the sensor number representing the unique identification by arranging the sensor ID chip in each load cell. Connect each load cell to a hardware channel of the data acquisition system. The data acquisition system obtains the voltage signal output by the corresponding load cell during the rail vehicle crash test through each hardware channel, and amplifies the voltage signal to obtain the target. Voltage signal, during the collision test of the rail vehicle, the control system determines the target sensor number of the load cell corresponding to the corresponding hardware channel according to each target voltage signal stored in the data acquisition system, and uses the pre-stored sensor number and sensor number to determine the target sensor number of the load cell. In the corresponding relationship of the coefficients, the sensor coefficient corresponding to each target sensor number is determined. Compared with the traditional solution, the present invention realizes the self-identification function of the rail vehicle crash test system, and does not need to manually determine and input the sensor coefficients of each force measuring sensor laid out in each crash test, thereby not only improving the work efficiency, but also effectively avoiding The system parameter setting is wrong.

Referring to FIG. 1 , a schematic structural diagram of a rail vehicle crash test system disclosed in an embodiment of the present invention includes: a sensor connection board 10 , a load cell group 20 , a data acquisition system 30 and a control system 40 .

in:

The sensor connection plate 10 is provided with installation holes, and the installation holes are used for arranging each load cell in the load cell group 20 and installing the acquisition cable and the like.

The load cell group 20 includes N load cells, each load cell is mounted on a mounting hole of the sensor connection plate 10 , and all load cells mounted on the sensor connection plate 10 form a rail vehicle collision wall.

Specifically, the load cell group 20 includes N load cells, such as the measurement sensor 1, the load cell 2, the load cell 3, the load cell 4, . . . , the load cell N shown in FIG. Each load cell has a sensor ID chip, and the sensor ID chip stores a sensor coefficient and a sensor number representing a unique identifier. The sensor coefficient is used to represent the corresponding relationship between the voltage value and the sensor force value, and N is a positive integer.

N is a positive integer, and the specific value is determined according to actual needs, which is not limited in the present invention.

It should be noted that, during the crash test of the rail vehicle, after each load cell in the load cell group 20 is installed on the sensor connection plate 10, the outgoing wires of each load cell are centrally arranged through the edge of the sensor connection plate 10. The port is connected to an external signal acquisition system.

The number of hardware channels in the data acquisition system 30 is not less than the number of load cells, and each load cell is connected to a hardware channel. When the output voltage signal is obtained, the target voltage signal is obtained by amplifying the voltage signal, and the target voltage signal is stored.

Optionally, the data acquisition system 30 is connected to the load cell group 20 through a collection cable, and the collection cable is installed on the installation hole of the sensor connection plate 10 .

It should be noted that the data acquisition system 30 can continuously record the voltage signal output by the load cell group 20 for a long time. The data acquisition system 30 has the characteristics of shock resistance, shock and moisture resistance, and high and low temperature resistance, can be placed in a complex electromagnetic environment, and has a relevant CE certification test report. The data acquisition system 30 is equipped with a solid-state hard disk. The solid-state hard disk is not afraid of the coupling vibration of strong noise, which can avoid data loss caused by the coupling vibration of strong noise during the test process, prolong the service life, and improve the measurement reliability.

Specifically, the data acquisition system 30 includes: a master 31 and a plurality of slaves 32, the master 31 is connected to each slave 32, the master 31 generates a synchronous clock signal, and sends the synchronous clock signal to each slave 32, The synchronization signal acquisition of the master 31 and each slave 32 is realized.

In practical applications, the master 31 and each slave 32 can be connected through a synchronization optical fiber, and the number of slaves 32 depends on the number of load cells included in the load cell group 20. For example, the number of slaves 32 is shown in FIG. 1 . The four shown in the present invention are not limited here.

It should be noted that the master 31 and each slave 32 can be connected in parallel using a dedicated master-slave synchronization board, and a synchronization optical fiber is used to transmit the synchronization clock signal to ensure that the physical clocks of the master 31 and each slave 32 are synchronized. Thereby improving the clock accuracy.

In this embodiment, both the host 31 and the slave 32 include: an amplifier and a collector, wherein the amplifier and the collector in the same host 31 or the same slave 32 are integrated to form a chassis.

The amplifier is used to amplify the voltage signal output by the load cell during the rail vehicle crash test to obtain the target voltage signal;

The collector is used to collect and store the target voltage signal.

The design of the collector mainly realizes multi-channel, high-speed and high-precision synchronous acquisition. In order to ensure high-speed multi-channel synchronous acquisition, the collector adopts the master-slave setting based on the PTP protocol to achieve highly synchronous acquisition accuracy. The built-in solid-state hard disk of the host is used for local storage, which can realize the data streaming capacity of 350MB/s for a single machine, thus getting rid of the resource limitation of PC and operating system, and meeting the application requirements of high-speed multi-channel acquisition.

Specifically, the data acquisition system 30 amplifies the voltage signal output by the load cell group 20 during the rail vehicle crash test through the amplifiers in the host 31 and the slave 32 to obtain the target voltage signal, and collects the target voltage signal through the collector. and stored in the collector's solid-state hard drive.

In practical applications, the host 31 can be configured with 2 acquisition cards with 16 hardware channels, which can realize the continuous acquisition of voltage signals of all 32 hardware channels and store them in the solid-state hard disk.

Each slave 32 can be configured with 3 acquisition cards with 16 hardware channels and 1 acquisition card with 8 hardware channels, which can realize the continuous acquisition of voltage signals of all 56 hardware channels and store them in the solid-state hard disk.

In the present invention, the data acquisition system 30 with 256 channels is preferentially selected according to the number of load cells included in the load cell group 20 .

The control system 40 obtains each target voltage signal from the data acquisition system 30, and determines the sensor number of the corresponding load cell based on the hardware channel corresponding to each target voltage signal, and records it as the target sensor number, from the pre-stored sensor number. In the corresponding relationship between the number and the sensor coefficient, the sensor coefficient corresponding to each target sensor number is determined.

It should be noted that, after the control system 40 determines the sensor coefficient corresponding to each target sensor number, it can determine the voltage output by the load cell corresponding to the target sensor number according to the corresponding relationship between the voltage value represented by the sensor coefficient and the sensor force value. The sensor force value after signal conversion.

Specifically, the control system 40 may include: a switch 41 and a host computer 42 , the host computer 42 is connected to the data acquisition system 30 through the switch 41 , and the host computer 42 is used to read each target from the solid-state hard disk of the data acquisition system 30 through the switch 41 voltage signal, and determine the sensor number of the corresponding load cell based on the hardware channel corresponding to each of the target voltage signals, and record it as the target sensor number. a sensor coefficient corresponding to the target sensor number.

Optionally, the host computer 42 is connected to the data acquisition system 30 through the switch 41 via a Gigabit Ethernet, and is specifically connected to a collector in the data acquisition system 30 .

To sum up, the present invention discloses a rail vehicle crash test system, comprising: a sensor connection board 10 , a load cell group 20 , a data acquisition system 30 and a control system 40 , each load cell in the load cell group 20 Installed on a mounting hole of the sensor connection board 10, all load cells installed on the sensor connection board 10 form a rail vehicle collision wall, the present invention stores sensor coefficients and representations by arranging a sensor ID chip in each load cell The uniquely identified sensor number, and each load cell is connected to a hardware channel of the data acquisition system 30, and the data acquisition system 30 obtains the voltage signal output by the corresponding load cell during the rail vehicle crash test through each hardware channel. , and amplify the voltage signal to obtain the target voltage signal. During the collision test of the rail vehicle, the control system 40 determines the target sensor of the load cell corresponding to the corresponding hardware channel according to each target voltage signal stored in the data acquisition system 30 number, and determine the sensor coefficient corresponding to each target sensor number from the pre-stored correspondence between the sensor number and the sensor coefficient. Compared with the traditional solution, the present invention realizes the self-identification function of the rail vehicle crash test system, and does not need to manually determine and input the sensor coefficients of each force measuring sensor laid out in each crash test, thereby not only improving the work efficiency, but also effectively avoiding The system parameter setting is wrong.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A rail vehicle crash test system is characterized by comprising: a sensor connection board, a force measuring sensor group, a data acquisition system and a control system;

   The sensor connecting plate is provided with mounting holes;

   The load cell group includes: N load cells, each of the load cells is installed on one of the mounting holes of the sensor connection board, and all the load cells installed on the sensor connection board The sensor forms a rail vehicle collision wall, wherein each of the load cells has a sensor ID chip, and the sensor ID chip stores a sensor coefficient and a sensor number representing a unique identification, and the sensor coefficient is used to represent the voltage value and the sensor force. The corresponding relationship of the value, N is a positive integer;

   The number of hardware channels that the data acquisition system has is not less than the number of the load cells, each of the load cells is connected to one of the hardware channels, and the data acquisition system acquires through each of the hardware channels the voltage signal output by the corresponding load cell during the collision test of the rail vehicle, amplify the voltage signal to obtain a target voltage signal, and store the target voltage signal;

   The control system obtains each of the target voltage signals from the data acquisition system, and determines the sensor number of the corresponding load cell based on the hardware channel corresponding to each of the target voltage signals, and records it as the target sensor number, from In the pre-stored correspondence between sensor numbers and sensor coefficients, the sensor coefficients corresponding to each of the target sensor numbers are determined.
2. The rail vehicle crash test system according to claim 1, wherein the data acquisition system comprises: a master and a plurality of slaves, the master is connected to each of the slaves, and the master generates a synchronous clock signal, and send the synchronization clock signal to each of the slaves, so as to realize the synchronization signal acquisition of the master and each of the slaves.
3. The rail vehicle crash test system according to claim 2, wherein the master and each of the slaves are connected by synchronous light.
4. The rail vehicle crash test system according to claim 2, wherein the host and each slave include: an amplifier and a collector, and the amplifier and the collector are integrated to form a chassis;

   The amplifier is used to amplify the voltage signal output by the load cell during the rail vehicle crash test to obtain the target voltage signal;

   The collector is used for collecting and storing the target voltage signal.
5. The rail vehicle crash test system according to claim 2, wherein the host is configured with 2 acquisition cards with 16 hardware channels, which can realize the continuous acquisition of voltage signals of all 32 hardware channels;

   Each of the slaves is configured with 3 acquisition cards with 16 hardware channels and 1 acquisition card with 8 hardware channels, which can realize the continuous acquisition of voltage signals of all 56 hardware channels.
6. The rail vehicle crash test system according to claim 1, wherein the control system comprises: a switch and a host computer, the host computer is connected to the data acquisition system through the switch, and the host computer is used for Obtain each target voltage signal from the data acquisition system through the switch, and determine the sensor number of the corresponding load cell based on the hardware channel corresponding to each target voltage signal, and record it as the target sensor number, from the pre-stored sensor number. In the corresponding relationship between the sensor number and the sensor coefficient, the sensor coefficient corresponding to each target sensor number is determined.
7. The rail vehicle crash test system according to claim 6, wherein the host computer is connected to the data acquisition system through the switch via Gigabit Ethernet.
8. The rail vehicle crash test system according to claim 1, characterized in that, the data acquisition system is connected with the load cell group through a collection cable, and the collection cable is installed on the sensor connection board. on the mounting hole.
9. The rail vehicle crash test system according to claim 1, wherein the data acquisition system is equipped with a solid-state hard disk, and the target voltage signal is stored by the solid-state hard disk.

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