CN112729747A

CN112729747A - Automobile environment wind tunnel process equipment control system

Info

Publication number: CN112729747A
Application number: CN202011613418.1A
Authority: CN
Inventors: 程益恒; 康永泰; 李跃; 石运军; 刘继月
Original assignee: China Academy of Aerospace Aerodynamics CAAA
Current assignee: China Academy of Aerospace Aerodynamics CAAA
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-30
Anticipated expiration: 2040-12-30
Also published as: CN112729747B

Abstract

The application discloses car environment wind tunnel process equipment control system, this system includes: the system comprises computer equipment, a control subsystem and a plurality of process equipment subsystems in an automobile environment wind tunnel, wherein the computer equipment is used for receiving operation data of each process equipment subsystem sent by the control subsystem and determining target configuration parameter information of each process equipment subsystem according to the operation data and a preset test flow; the control subsystem is used for receiving the target configuration parameter information and the operation data sent by each process equipment subsystem, sending the operation data to the computer equipment and generating a control instruction according to the target configuration parameter information and a preset control strategy; and each process equipment subsystem is used for receiving the control instruction and automatically controlling the operation of the process equipment subsystem according to the control instruction. The technical problems that in the prior art, the automation degree of a process equipment control system is poor, and the control efficiency is low are solved.

Description

Automobile environment wind tunnel process equipment control system

Technical Field

The application relates to the technical field of automobile environment wind tunnels, in particular to a system and a method for controlling automobile environment wind tunnel process equipment.

Background

An automobile environment wind tunnel is a large-scale special device used for carrying out environment tests on test vehicles and simulating various environmental conditions such as wind speed, temperature, humidity, rain, snow and the like, and generally comprises a fan, a chassis dynamometer, a sunlight simulation system, a process equipment system and the like, wherein the process equipment system generally comprises a compressed air subsystem, a cooling water system, a hot water system, a steam system, a brine temperature control system, a humidification system, a fresh air system, a tail exhaust system, a rain and snow simulation system and the like. The fan, the chassis dynamometer and the sunlight simulation system are mature series products, a control system of the system is generally matched with equipment, and a process equipment system has different designs in each wind tunnel due to the complexity of the process equipment system, so that the process equipment system is different for different automobile environment wind tunnels. The control of each process equipment system is an important link in the wind tunnel of the automobile environment.

At present, a set of process equipment control system is commonly adopted to control each process equipment system in an automobile environment wind tunnel to control a compressed air subsystem, a cooling water system, a hot water system, a steam system, a brine temperature control system, a humidification system, a fresh air system, a tail exhaust system, a rain and snow simulation system and the like, however, in the prior art, if a plurality of process equipment systems need to participate in the implementation of a demand simultaneously, an operator needs to respectively perform indication switching on the plurality of process equipment systems through the process equipment control system, namely, in the prior art, manual participation is too much when the plurality of process equipment systems are controlled through the process equipment control system, the automation degree of the prior art process equipment control system is poor, and the control efficiency is low.

Disclosure of Invention

The technical problem that this application was solved is: aiming at the problems of poor automation degree and low control efficiency of a process equipment control system in the prior art. The application provides an automobile environment wind tunnel process equipment control system, in the scheme that this application embodiment provided, give the target configuration parameter information of every process equipment subsystem through computer equipment, then control subsystem carries out automation according to target configuration parameter information and predetermine control strategy, overall generation control command, rethread control command is controlled every process equipment subsystem, the scheme that this application embodiment provided promptly through control subsystem automatic call, control relevant function module's parameter and chronogenesis, realize every process equipment subsystem automation, overall control, and then improved process equipment control system's degree of automation and control efficiency.

In a first aspect, an embodiment of the present application provides an automobile environment wind tunnel process equipment control system, which includes: computer equipment, a control subsystem and a plurality of process equipment subsystems in an automobile environment wind tunnel, wherein,

the computer equipment is used for receiving the operation data of each process equipment subsystem sent by the control subsystem and determining the target configuration parameter information of each process equipment subsystem according to the operation data and a preset test flow;

the control subsystem is used for receiving the target configuration parameter information and the operation data sent by each process equipment subsystem, sending the operation data to the computer equipment and generating a control instruction according to the target configuration parameter information and a preset control strategy;

and each process equipment subsystem is used for receiving the control instruction and automatically controlling the operation of the process equipment subsystem according to the control instruction.

In the scheme provided by the embodiment of the application, the target configuration parameter information of each process equipment subsystem is given through computer equipment, then the control subsystem automatically and integrally generates the control instruction according to the target configuration parameter information and the preset control strategy, and then each process equipment subsystem is controlled through the control instruction.

Optionally, the control subsystem includes: a process control subsystem, an environmental control subsystem, and a utility power control subsystem, wherein,

the process control subsystem is used for receiving the target configuration parameter information and the operation data, sending the operation data to the computer equipment and automatically controlling the movement of each moving part in the automobile environment wind tunnel according to the target configuration parameter information and the preset control strategy;

the environment control subsystem is used for automatically controlling and adjusting the temperature, the humidity, the fresh air quantity and the tail gas discharge quantity of the automobile environment wind tunnel or providing a rain and snow environment according to the target configuration parameter information and the preset control strategy;

and the public power control subsystem is used for automatically controlling the compressed air, cooling circulating water, thermal circulating water or steam provided for the automobile environment wind tunnel according to the target configuration parameter information and the preset control strategy.

Optionally, the automobile environment wind tunnel comprises a preparation mode, an air conditioning mode, a test mode and a shutdown mode;

the preset control strategy comprises the following steps:

if the shutdown mode is switched to the preparation mode, controlling the public power control subsystem to generate a first control instruction, wherein the first control instruction is used for controlling and adjusting the pressure of compressed air, the temperature of cooling water, the temperature of hot circulating water and the steam pressure;

if the automobile environment wind tunnel is in the preparation mode, controlling the process control subsystem to generate a second control instruction, wherein the second control instruction is used for controlling movement of each moving part in the automobile environment wind tunnel;

if the preparation mode is switched to the air-conditioning mode, controlling the environment control subsystem to generate a third control instruction and controlling the public power control subsystem to generate a fourth control instruction, wherein the third control instruction is used for controlling and adjusting the ambient temperature and humidity of the automobile ambient wind tunnel, and the fourth control instruction is used for controlling and providing compressed air, cooling circulating water, thermal circulating water or steam for the automobile ambient wind tunnel;

if the air conditioning mode is switched to the test mode, controlling the environment control subsystem to generate a fifth control instruction and controlling the public power control subsystem to generate a sixth control instruction, wherein the fifth control instruction is used for controlling and adjusting the environment temperature, the humidity, the injected fresh air, the tail exhaust air quantity, the rainfall or the snowfall quantity of the automobile environment wind tunnel, and the fourth control instruction is used for controlling and providing compressed air, cooling circulating water, hot circulating water or steam for the automobile environment wind tunnel;

and if the test mode is switched to the shutdown mode, stopping the control subsystem from generating the command.

Optionally, the environmental control subsystem includes: the system comprises a temperature control module, a fresh air and humidity control module, a tail row control module and a rain and snow control module;

the temperature control module is used for controlling and adjusting the temperature of the automobile environment wind tunnel according to the target configuration parameter information;

the fresh air and humidity control module is used for controlling and adjusting the fresh air volume of the automobile environment wind tunnel and the humidity of the humidifying system according to the target configuration parameter information;

the tail discharge control module is used for controlling and adjusting the discharge tail gas quantity of the automobile environment wind tunnel according to the target configuration parameter information;

and the rain and snow control module is used for controlling and adjusting the rain and snow simulation system in the automobile environment wind tunnel to provide a rain and snow environment according to the target configuration parameter information.

Optionally, the utility power control subsystem comprises: the system comprises a compressed air control module, a cooling water control module, a hot water control module and a steam control module; wherein the content of the first and second substances,

the compressed air control module is used for controlling and adjusting a compressed air subsystem to provide compressed air for the automobile environment wind tunnel according to the target configuration parameter information;

the cooling water control module is used for controlling and adjusting a cooling water system to provide cooling water for the automobile environment wind tunnel according to the target configuration parameter information;

the hot water control module is used for controlling and adjusting a hot water system to provide hot water for the automobile environment wind tunnel according to the target configuration parameter information;

and the steam control module is used for controlling and adjusting a steam system to provide steam for the automobile environment wind tunnel according to the target configuration parameter information.

Optionally, the temperature control module is specifically configured to:

determining a wind tunnel target temperature, a low-temperature refrigeration branch target temperature, a low-temperature variable-frequency water pump target frequency, a normal-temperature refrigeration branch target temperature, a heating branch target temperature, a wind tunnel heat exchange main path variable-frequency water pump target frequency, a normal-temperature variable-frequency water pump target frequency and a heating variable-frequency water pump target frequency according to the target configuration parameter information;

adjusting the frequency of the variable frequency water pump of the main wind tunnel heat exchange path according to the target frequency of the variable frequency water pump of the main wind tunnel heat exchange path, judging whether the target temperature of the wind tunnel is greater than the preset switching temperature of the refrigeration branch path to obtain a judgment result, and starting a normal-temperature refrigeration branch path or a low-temperature refrigeration branch path according to the judgment result;

if the target temperature of the wind tunnel is higher than the preset refrigeration branch switching temperature, starting the normal-temperature refrigeration branch, and modulating the frequency of the normal-temperature refrigeration branch and the cooling water temperature according to the target temperature of the normal-temperature refrigeration branch and the target frequency of the normal-temperature variable-frequency water pump;

if the target temperature of the wind tunnel is lower than the preset refrigeration branch switching temperature, starting the low-temperature refrigeration branch, and modulating the frequency of the low-temperature refrigeration branch and the cooling water temperature according to the target temperature of the low-temperature refrigeration branch and the target frequency of the low-temperature variable-frequency water pump;

and starting and adjusting the frequency of the heating branch and the temperature of cooling water according to the target temperature of the heating branch and the target frequency of the heating variable-frequency water pump.

In the scheme that this application embodiment provided, through temperature control module according to target configuration parameter information through control room temperature refrigeration branch or the start-up of low temperature refrigeration branch and the frequency and the cooling water temperature of adjusting room temperature refrigeration branch or low temperature refrigeration branch realize the control adjustment to the wind-tunnel temperature, realize carrying out the control adjustment that becomes more meticulous to the wind-tunnel temperature through temperature control module promptly.

Optionally, according to the normal temperature refrigeration branch road target temperature and the normal temperature variable frequency water pump target frequency modulation the frequency and the cooling water temperature of the normal temperature refrigeration branch road include:

judging whether the normal temperature refrigeration branch is closed or not;

if the frequency of the normal-temperature refrigeration branch cooling water side variable-frequency cooling water pump is closed, the normal-temperature refrigeration branch brine side normal-temperature variable-frequency cooling water pump and the normal-temperature refrigeration branch cooling water side normal-temperature variable-frequency cooling water pump are opened, the frequency value of the normal-temperature refrigeration branch cooling water side variable-frequency cooling water pump is adjusted to be the target frequency of the normal-temperature variable-frequency cooling water pump, and the frequency of the normal-temperature refrigeration branch brine side normal-temperature variable-frequency cooling water pump;

and adjusting a normal temperature control valve in the normal temperature refrigeration branch to adjust the temperature of the cooling water to the target temperature of the normal temperature refrigeration branch.

Optionally, the compressed air control module is specifically configured to:

judging whether the preset running time of the first compressor is less than the preset running time of the second compressor or not;

if the pressure of the first compressor is smaller than the pressure of the second compressor, setting configuration parameters of the first compressor and the second compressor, wherein the configuration parameters comprise an upper pressure limit and a lower pressure limit;

and determining the current pressure value of the automobile environment wind tunnel, selecting any compressor from the first compressor and the second compressor according to the current pressure value and the configuration parameters, and starting the any compressor until the current pressure value is greater than the upper pressure limit corresponding to the any compressor.

According to the scheme provided by the embodiment of the application, the started compressor is selected from the two compressors through the compressed air control module according to the target configuration parameter information and the current pressure value, the compressed air in the automobile environment wind tunnel is adjusted through the started compressor, and fine control and adjustment of the compressed air in the wind tunnel are achieved through the compressed air control module.

Optionally, the cooling water control module is specifically configured to:

determining the current cooling water temperature of the automobile environment wind tunnel and determining a target cooling water temperature, a temperature reduction rate and a maximum positive difference value between the current cooling water temperature and the target cooling water temperature according to the target configuration parameter information, wherein the maximum positive difference value comprises a first maximum positive difference value obtained by subtracting the target cooling water temperature from the current cooling water temperature, and a second maximum positive difference value obtained by subtracting the current cooling water temperature from the target cooling water temperature;

judging whether the difference value between the current cooling water temperature and the target cooling water temperature is not less than the first maximum positive difference value;

if the difference between the current cooling water temperature and the target cooling water temperature is not smaller than the first maximum positive difference, determining a plurality of cooling towers which do not operate and the first operation time of each cooling tower which does not operate, and selecting the first cooling tower with the shortest operation time according to the first operation time;

judging whether the temperature reduction rate is not less than the temperature reduction rate within a preset time;

if the temperature reduction rate is not less than the temperature reduction rate within the preset time, judging whether the difference value between the target cooling water temperature and the current cooling water temperature is not less than the second maximum positive difference value;

if the difference value between the target cooling water temperature and the current cooling water temperature is not smaller than the second maximum positive difference value, determining a plurality of operating cooling towers and a second operating time of each operating cooling tower, and selecting the second cooling tower with the longest operating time according to the second operating time;

judging whether to stop the automatic cooling water adjusting process;

if stopping, the process is ended; otherwise, whether the difference value between the current cooling water temperature and the target cooling water temperature is not less than the first maximum positive difference value is judged again.

According to the scheme provided by the embodiment of the application, the cooling water control module selects the started cooling tower from the plurality of cooling towers controlled by the cooling water control module according to the current cooling water temperature and the target configuration parameter information of the automobile environment wind tunnel, the temperature of the cooling water in the automobile environment wind tunnel is adjusted through the started cooling tower, and fine control and adjustment on the temperature of the cooling water in the wind tunnel are realized through the cooling water control module.

Optionally, the control subsystem further includes: a safety control subsystem; the safety control subsystem comprises: the system comprises a mode selection module, an emergency stop module, a gas detection monitoring module, a high-pressure fine water monitoring module and a safety matrix logic module;

the mode selection module is used for controlling mode switching in the automobile environment wind tunnel and generating a mode selection signal;

the emergency stop module is used for receiving emergency stop operation and reset operation input by an operator and generating an emergency stop signal and a reset signal;

the gas detection monitoring module is used for receiving a dangerous gas alarm signal sent by a gas detection system;

the high-pressure water mist monitoring module is used for receiving a fire alarm signal of the parking test vehicle, which is monitored by a fire probe of the high-pressure water mist system;

the safety matrix logic module is used for receiving the emergency stop and fault data of each process equipment subsystem and the state information of each door in the automobile environment wind tunnel, performing logic operation on the emergency stop and fault data, the state information, the mode selection signal, the emergency stop signal, the reset signal, the dangerous gas alarm signal and the fire alarm signal according to a preset safety matrix, and sending an operation result to each process equipment subsystem.

In the scheme provided by the embodiment of the application, the definition and the switching of various modes of the wind tunnel are realized by configuring the independent safety control subsystem, the safety state of the main equipment, the dangerous gas and the like are monitored according to the preset safety matrix, and the instructions with different safety levels are sent to the corresponding systems according to different risk levels, so that the independent safety state monitoring and the response are realized.

Drawings

Fig. 1 is a schematic structural diagram of a control system of an automotive environment wind tunnel process equipment according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an environmental control subsystem according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a utility power control subsystem provided in an embodiment of the present application;

fig. 4 is a schematic diagram illustrating control modes and operation timings of various systems in a control subsystem according to an embodiment of the present disclosure;

FIG. 5 is a schematic flow chart illustrating a wind tunnel temperature control and adjustment provided in an embodiment of the present application;

FIG. 6 is a schematic flow chart illustrating a controlled conditioning of compressed air according to an embodiment of the present disclosure;

fig. 7 is a schematic flow chart of a cooling water control regulation according to an embodiment of the present application.

Detailed Description

In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present application provides a control system for an automotive environment wind tunnel process device, where the system includes: computer equipment 1, a control subsystem 2 and a plurality of process equipment subsystems 3 in a wind tunnel of an automobile environment, wherein,

the computer device 1 is configured to receive the operation data of each process equipment subsystem 3 sent by the control subsystem 2, and determine target configuration parameter information of each process equipment subsystem 3 according to the operation data and a preset test flow;

the control subsystem 2 is configured to receive the target configuration parameter information and the operation data sent by each process equipment subsystem 3, send the operation data to the computer equipment 1, and generate a control instruction according to the target configuration parameter information and a preset control policy;

and each process equipment subsystem 3 is used for receiving the control instruction and automatically controlling the operation of the process equipment subsystem according to the control instruction.

In the solution provided in the embodiment of the present application, the plurality of process equipment subsystems 3 include, but are not limited to, a compressed air subsystem, a cooling water system, a hot water system, a steam system, a brine temperature control system, a humidification system, a fresh air system, a tail exhaust system, a rain and snow simulation system, and the like. The target configuration parameters include, but are not limited to, a target temperature, a target humidity, a target fresh air volume, a target tail discharge volume, a target rainfall and a target snowfall of the automobile environment wind tunnel.

It should be understood that, in the solution provided in the embodiment of the present application, the computer device 1, the control subsystem 2, and each process device subsystem 3 are respectively connected to their own switches, and then the switches are connected by optical fibers to form an optical fiber ring network together, so that the data information of the computer device 1, the control subsystem 2, and each process device subsystem 3 is transmitted in the network.

The computer device 1 includes a computer device used by an engineer and a computer device used by an operator. The computer device used by the engineer is used for receiving the program codes output by the engineer to realize the hardware configuration, control software writing and the like of the whole process equipment control system, for example, the engineer can write a computer device monitoring screen program used by a monitoring operator and a process control program of each subsystem through the computer device. The computer equipment used by an operator is used for downloading a monitoring picture program and control software from the computer equipment used by an engineer through an optical fiber ring network, monitoring parameters such as pressure, temperature and flow in each process equipment system and target parameters such as temperature and humidity of a wind tunnel according to the monitoring picture program, sending control parameters and control instructions to all subsystem modules, automatically loading parameter configuration combinations under corresponding temperature and humidity conditions according to a parameter configuration matrix after setting the target temperature and humidity, and issuing the parameter configuration combinations to each subsystem to serve as target parameter values for adjustment of each subsystem. The configured target parameters include: the common power control subsystem 23 is used for controlling the target temperature of cooling water of a cooling water control module, the target temperature of a low-temperature refrigeration branch circuit and the target frequency of a low-temperature variable-frequency water pump of a temperature control module of an environment control subsystem, the target temperature of a normal-temperature refrigeration branch circuit and the target frequency of a normal-temperature variable-frequency water pump, the target temperature of a heating branch circuit and the target frequency of a heating variable-frequency water pump, the target frequency of a main variable-frequency water pump of a wind tunnel heat exchange main circuit, the target air volume, the temperature and the humidity of fresh air of a fresh air and humidity.

Further, in the solution provided in the embodiment of the present application, the automobile environment wind tunnel process equipment control system further includes a database server, where the database server is used to store historical data and states, operation records, alarm records, and the like of the whole process equipment control system. The system comprises the temperature and the humidity of an environment wind tunnel body, the air volume, the temperature and the humidity of fresh air, tail exhaust suction air volume, compressed air pressure, cooling water temperature, hot water temperature, steam pressure, the position state of each moving part and the like.

Further, in a possible implementation manner, the control subsystem 2 includes: a process control subsystem 21, an environmental control subsystem 22, and a utility control subsystem 23, wherein,

the process control subsystem 21 is configured to receive the target configuration parameter information and the operation data, send the operation data to the computer device 1, and automatically control movement of each moving component in the automobile environment wind tunnel according to the target configuration parameter information and the preset control strategy;

the environment control subsystem 22 is configured to automatically control and adjust the temperature, the humidity, the fresh air volume, the exhaust air volume, or provide a rain and snow environment of the automobile environment wind tunnel according to the target configuration parameter information and the preset control strategy;

and the public power control subsystem 23 is configured to automatically control to provide compressed air, cooling circulating water, thermal circulating water or steam for the automobile environment wind tunnel according to the target configuration parameter information and the preset control strategy.

Further, in a possible implementation manner, the automobile environment wind tunnel comprises a preparation mode, an air conditioning mode, a test mode and a shutdown mode;

the preset control strategy comprises the following steps:

if the shutdown mode is switched to the preparation mode, controlling the public power control subsystem 23 to generate a first control command, wherein the first control command is used for controlling and adjusting the pressure of compressed air, the temperature of cooling water, the temperature of hot circulating water and the steam pressure;

if the automobile environment wind tunnel is in the preparation mode, controlling the process control subsystem 21 to generate a second control instruction, wherein the second control instruction is used for controlling movement of each moving part in the automobile environment wind tunnel;

if the preparation mode is switched to the air-conditioning mode, controlling the environment control subsystem 22 to generate a third control instruction and controlling the public power control subsystem 23 to generate a fourth control instruction, wherein the third control instruction is used for controlling and adjusting the ambient temperature and humidity of the automobile ambient wind tunnel, and the fourth control instruction is used for controlling and providing compressed air, cooling circulating water, hot circulating water or steam for the automobile ambient wind tunnel;

if the air-conditioning mode is switched to the test mode, controlling the environment control subsystem 22 to generate a fifth control instruction and controlling the public power control subsystem 23 to generate a sixth control instruction, wherein the fifth control instruction is used for controlling and adjusting the environment temperature and the humidity of the automobile environment wind tunnel, injecting fresh air, exhausting air volume at the tail, rainfall or snowfall, and the fourth control instruction is used for controlling and providing compressed air, cooling circulating water, hot circulating water or steam for the automobile environment wind tunnel;

and if the test mode is switched to the shutdown mode, stopping the control subsystem 2 from generating the instruction.

Further, referring to fig. 2, in one possible implementation, the environmental control subsystem 22 includes: a temperature control module 221, a fresh air and humidity control module 222, a tail row control module 223 and a rain and snow control module 224;

the temperature control module 221 is configured to control and adjust the temperature of the automobile environment wind tunnel according to the target configuration parameter information;

the fresh air and humidity control module 222 is configured to control and adjust fresh air volume of the automobile environment wind tunnel and humidity of the humidification system according to the target configuration parameter information;

the tail discharge control module 223 is configured to control and adjust the amount of tail gas discharged from the automobile environment wind tunnel according to the target configuration parameter information;

the rain and snow control module 224 is configured to control and adjust a rain and snow simulation system in the wind tunnel of the automobile environment to provide a rain and snow environment according to the target configuration parameter information.

Further, with reference to fig. 3, in one possible implementation, the utility control subsystem 23 includes: a compressed air control module 231, a cooling water control module 232, a hot water control module 233, and a steam control module 234; the compressed air control module 231 is configured to control and adjust a compressed air subsystem to provide compressed air for the automobile environment wind tunnel according to the target configuration parameter information; the cooling water control module 232 is configured to control and adjust a cooling water system to provide cooling water for the automobile environment wind tunnel according to the target configuration parameter information; the hot water control module 233 is configured to control and adjust a hot water system to provide hot water for the automobile environment wind tunnel according to the target configuration parameter information; the steam control module 234 is configured to control and adjust a steam system to provide steam for the automobile environment wind tunnel according to the target configuration parameter information.

Specifically, in the solution provided in the embodiment of the present application, the process control subsystem 21 includes a test flow communication module, a moving part control module, and an energy monitoring module. The automobile environment wind tunnel comprises a preparation mode, an air conditioning mode, a test mode and a shutdown mode, wherein the shutdown mode means that the operation permission of all equipment in the automobile wind tunnel is limited; the preparation mode is to prepare the wind tunnel public power energy and prepare a test vehicle and a test instrument; in the air conditioning mode, the temperature and the humidity of the wind tunnel are adjusted, and environmental conditions are prepared for formal tests of vehicles; under the test mode, the environment and the process conditions of temperature, humidity, rain, snow, fresh air, tail exhaust and the like meeting the requirements are provided for vehicle tests, and the vehicle environment tests under set working conditions are carried out.

Referring to fig. 4, a schematic diagram of control modes and operation timings of various systems in a control subsystem according to an embodiment of the present disclosure is provided. The operation of each system of the control subsystem is briefly described according to the timing sequence described in fig. 4.

Before the test, the process control subsystem 21 controls all moving parts to reach the test position, the public power control subsystem 23 controls and adjusts parameters of compressed air, cooling water, hot water and steam to reach the target pressure or temperature so as to provide public energy power for all equipment of the wind tunnel, and then the environment control subsystem 22 controls systems of temperature control, fresh air, humidity and the like so as to enable the wind tunnel to reach the temperature and humidity required by the environment test. In the test, the environmental control subsystem 23 controls the temperature control system, the fresh air system, the humidity system and the like to stabilize the wind tunnel at the current target temperature and humidity, simultaneously supply fresh air and discharge tail gas, and provide a rain and snow environment for part of the test. Specifically, the control process of the control subsystem 2 is as follows:

firstly, a shutdown mode is switched to a preparation mode, all modules of the public power control subsystem 23 start to operate, and the compressed air control module controls and adjusts the pressure of compressed air to provide compressed air meeting pressure requirements for a pneumatic three-way valve, a chassis dynamometer and the like of an environmental wind tunnel; the cooling water control module controls and adjusts the temperature of cooling water to provide cooling circulating water meeting the temperature requirement for a refrigerating unit of the environmental wind tunnel and the like; the hot water control module controls and adjusts the temperature of hot circulating water to provide hot circulating water meeting the temperature requirement for the wind tunnel hot water plate exchanger and the fresh air handling unit; the steam control module controls and adjusts steam pressure to provide steam meeting the pressure requirement for the wind tunnel humidifying device. The control and regulation provide all the required public energy power for the normal operation of the wind tunnel, and the public power control subsystem 23 continuously controls all the control modules to provide the public power energy for the wind tunnel in the air conditioning and test modes. Meanwhile, in the preparation mode, the moving part control module of the process control subsystem 21 controls each moving part to reach the position required by the test.

After the work is finished, the preparation mode is switched to the air conditioning mode, at the moment, the temperature control module of the environment control subsystem 22 realizes the temperature adjustment of the wind tunnel heat exchange main path through controlling the low-temperature refrigeration branch, the normal-temperature refrigeration branch and the heating branch, so that the air flow temperature of a wind tunnel runner, namely the temperature index of the whole wind tunnel, is adjusted, and the environment temperature meeting the vehicle test requirement is provided for the environment wind tunnel; the fresh air and humidity control module controls a fresh air system with a humidifying function to operate in a full return air mode, and controls and adjusts the airflow humidity of a wind tunnel flow channel, namely the humidity index of the whole wind tunnel, so as to provide the environmental humidity meeting the vehicle test requirement for the environmental wind tunnel; and finally, regulating the wind tunnel environment to the target temperature and humidity required by the vehicle test through the coordination of the temperature and the humidity.

Then, the test mode is switched to, the temperature control module of the environment control subsystem 22 continuously controls the low-temperature refrigeration branch, the normal-temperature refrigeration branch and the heating branch to realize the temperature regulation of the main heat exchange path of the wind tunnel, so that the air flow temperature of the flow channel of the wind tunnel is regulated, and the wind tunnel can be quickly and accurately stabilized near the target temperature no matter under the conditions of constant temperature and variable load or variable target temperature; the fresh air and humidity control module controls and switches the fresh air mode into a full fresh air mode, provides fresh air consistent with the ambient temperature and humidity of the wind tunnel, and is linked with the tail exhaust control module to realize the consistency of the fresh air injected into the wind tunnel and the tail exhaust air volume sucked out. Meanwhile, when the automobile environment tests such as rainfall and snowfall are carried out, the rainfall or the snow amount of the rainfall and the snowfall can be controlled and adjusted by the rain and snow simulation control module, so that the rain and snow environment with the corresponding grade can be provided. And after the test is finished, the test mode is switched to a shutdown mode, and the control and adjustment of all the modules are stopped.

Further, in the solution provided in the embodiment of the present application, in order to perform fine control on temperature regulation and control in an automobile wind tunnel environment, in a possible implementation manner, the temperature control module 221 is specifically configured to:

Further, in a possible implementation manner, modulating the frequency of the normal-temperature refrigeration branch and the cooling water temperature according to the target temperature of the normal-temperature refrigeration branch and the target frequency of the normal-temperature variable-frequency water pump includes:

judging whether the normal temperature refrigeration branch is closed or not;

In the scheme provided by the embodiment of the application, the temperature control module 221 needs to automatically switch the corresponding branch according to the target temperature, so as to automatically complete the adjustment of the wind tunnel temperature, wherein the branch comprises a refrigeration branch and a heating branch. Specifically, referring to fig. 5, the process of automatically switching the corresponding branch and automatically controlling and adjusting the temperature of the wind tunnel is as follows:

firstly, parameter setting and loading are carried out, and the parameter setting and loading comprises a wind tunnel target temperature, a low-temperature refrigeration branch target temperature and a low-temperature variable-frequency water pump target frequency, a normal-temperature refrigeration branch target temperature and a normal-temperature variable-frequency water pump target frequency, a heating branch target temperature and a heating variable-frequency water pump target frequency, and a wind tunnel heat exchange main circuit main variable-frequency water pump target frequency.

And secondly, starting a main frequency conversion water pump of the wind tunnel heat exchange main circuit to a set frequency.

And controlling the refrigerating branch and the heating branch simultaneously.

Specifically, for ease of understanding, the control processes of the cooling branch and the heating branch are briefly described below.

First, refrigeration branch

And judging whether the target temperature of the wind tunnel is greater than the switching temperature of the refrigeration branch, if so, starting the normal-temperature branch, and if not, starting the low-temperature branch. If the normal-temperature refrigeration branch is started, firstly judging whether the low-temperature refrigeration branch is closed, if not, closing the low-temperature refrigeration branch, if so, starting a cooling water side variable-frequency cooling water pump of the normal-temperature refrigeration branch to set frequency, adjusting the temperature of cooling water to a set value through a normal-temperature branch cooling water temperature control valve, and simultaneously starting a normal-temperature refrigeration branch saline water measurement normal-temperature variable-frequency water pump to set frequency; if the low-temperature refrigeration branch is started, firstly judging whether the normal-temperature refrigeration branch is closed, if not, closing the normal-temperature refrigeration branch, if so, starting the variable-frequency cooling water pump at the cooling water side of the low-temperature refrigeration branch to set frequency, adjusting the temperature of the cooling water to a set value through the temperature control valve of the cooling water of the low-temperature branch, and simultaneously starting the saline water of the low-temperature refrigeration branch to measure the normal-temperature variable-frequency water pump to the set frequency.

Two, heating branch

Starting a heating branch cooling water side variable frequency cooling water pump to a set frequency, adjusting the temperature of cooling water to a set value through a heating branch cooling water temperature control valve, and starting a heating branch brine measuring heating variable frequency water pump to the set frequency;

and fourthly, controlling and adjusting the temperature of the main heat exchange path of the wind tunnel through a main temperature control valve.

Judging whether the wind tunnel temperature reaches the target value, if so, continuing the step (c), and if not, returning to the step (d).

Sixthly, judging whether the test is finished or not, if so, finishing the whole process, and if not, skipping to the fifth step.

In the scheme that this application embodiment provided, control adjustment to the wind tunnel temperature is realized through the frequency and the cooling water temperature of control room temperature refrigeration branch road or low temperature refrigeration branch road start and adjustment room temperature refrigeration branch road or low temperature refrigeration branch road according to target configuration parameter information through temperature control module 221, realizes carrying out the control adjustment that becomes more meticulous to the wind tunnel temperature through temperature control module 221 promptly.

Further, in the solution provided in the embodiment of the present application, in order to perform fine control on compressed air in an automobile wind tunnel environment, in a possible implementation manner, the compressed air control module 231 is specifically configured to:

Specifically, in the scheme provided by the embodiment of the application, the compressed air subsystem serves as an important system to provide compressed air for the three-way valve, the chassis dynamometer and the like, and the reliability of temperature control and the reliability of pneumatic braking of the chassis dynamometer are directly related, so that a backup mode of two compressor sets is adopted. For the control of the compressed air subsystem, two aspects need to be considered, firstly, if a single set of compressed air system set can meet the air consumption requirement, then, if one set of compressed air system set breaks down, the other set of compressed air system set can be started in time to prevent the continuous reduction of the air source pressure caused by the fault, and secondly, if the single set of unit can not meet the air consumption requirement, then, the unit needs to intervene step by step. Meanwhile, the average running life of the two units is also considered, and the excessive use of a certain set of unit is prevented. Taking two compressor sets as a 1# compressor and a 2# compressor as an example, referring to fig. 6, the automatic flow of the compressed air control module is as follows:

1. and judging whether the running time of the 1# compressor is less than the running time of the 2# compressor, if so, selecting the step 2, and if not, selecting the step 3.

2. A compressor is selected.

a) Configuring parameters, setting a 1# compressor pressure upper limit pmax and a pressure lower limit pmin1, setting a 2# compressor pressure upper limit pmax and a pressure lower limit pmin2, wherein pmin1 is greater than pmin 2;

b) judging whether the current pressure p is smaller than pmin1, if so, continuing to the step c), and if not, jumping to the step f);

c) starting the 1# compressor;

d) judging whether the current pressure p is smaller than pmin2, if so, continuing to the step e), and if not, jumping to the step f);

e) starting the 2# compressor;

f) judging whether the current pressure p is larger than pmax or not, if so, jumping to the step 4, and if not, jumping to the step b);

3. a compressor is selected.

(a) Configuring parameters, setting a 2# compressor pressure upper limit pmax and a pressure lower limit pmin1, setting a 1# compressor pressure upper limit pmax and a pressure lower limit pmin2, wherein pmin1 is greater than pmin 2;

(b) judging whether the current pressure p is smaller than pmin1, if so, continuing the step (c), and if not, jumping to the step (f);

(c) starting the 2# compressor;

(d) judging whether the current pressure p is smaller than pmin2, if so, continuing the step (e), and if not, jumping to the step (f);

(e) starting the 1# compressor;

(f) judging whether the current pressure p is greater than pmax or not, if so, jumping to the step 4, and if not, jumping to the step (b);

4. all compressors are stopped.

5. And judging whether the automatic flow is stopped or not, if so, ending the flow, and if not, jumping back to 1.

In the scheme provided by the embodiment of the application, the started compressor is selected from the two compressors according to the target configuration parameter information and the current pressure value through the compressed air control module 231, the compressed air in the automobile environment wind tunnel is adjusted through the started compressor, namely, the compressed air in the wind tunnel is finely controlled and adjusted through the compressed air control module 231.

Further, in the solution provided in the embodiment of the present application, in order to perform fine control on the temperature of cooling water in the wind tunnel environment of the automobile, in a possible implementation manner, the cooling water control module 232 is specifically configured to:

judging whether to stop the automatic cooling water adjusting process;

Specifically, in the scheme that this application embodiment provided, cooling water control module 232 contains the control to a plurality of cooling towers, during control, need at first guarantee to cooling water temperature's accuracy, stable control, simultaneously, receive the influence of more test volume, automobile environment wind-tunnel and relevant equipment are in operating condition throughout the year, and equipment service life reaches two thirty years, consequently, for guaranteeing the life of cooling tower, need take turns to a plurality of cooling towers to use, guarantee that the operating time of a plurality of cooling towers is unanimous basically. Referring to fig. 7, the automatic control process for the cooling tower is as follows:

step 1, parameter setting and loading are carried out, wherein the parameter setting and loading comprises a target temperature Ta, a maximum positive difference value delta TH of the actual temperature minus the target temperature, a maximum positive difference value delta TL of the target temperature minus the actual temperature, a temperature drop rate dT, and the actual temperature is represented as T.

And 2, judging whether the T-Ta is more than or equal to the delta TH, if so, continuing to the step 3, and if not, skipping to the step 5.

And 3, sequencing the running time of each cooling tower which does not run, and starting the cooling tower with the shortest running time in the sequencing.

And 4, judging whether the actual temperature reduction rate in the fixed time is greater than or equal to dT, if so, continuing to the step 5, and if not, skipping back to the step 3.

And 5, judging whether the Ta-T is larger than or equal to the delta TL or not, if so, continuing to the step 6, and if not, skipping to the step 7.

And 6, sequencing the running time of each running cooling tower, and closing the cooling tower with the longest running time in the sequencing.

And 7, judging whether the automatic flow is stopped or not, if the automatic flow is stopped, ending the whole flow, and if the automatic flow is not stopped, jumping to the step 2.

In the scheme provided by the embodiment of the application, the cooling tower which is started is selected from a plurality of cooling towers controlled by the cooling water control module through the cooling water control module 232 according to the current cooling water temperature and the target configuration parameter information of the automobile environment wind tunnel, the cooling water temperature in the automobile environment wind tunnel is adjusted through the started cooling tower, and fine control and adjustment on the wind tunnel cooling water temperature are realized through the cooling water control module 232.

Further, in the solution provided in the embodiment of the present application, in order to perform mode switching, safety device status, and hazardous gas monitoring in an automobile wind tunnel environment, in a possible implementation manner, the control subsystem 2 further includes: a safety control subsystem 24; the safety control subsystem 24, comprising: a mode selection module 241, an emergency stop module 242, a gas detection monitoring module 243, a high pressure fine water monitoring module 244 and a safety matrix logic module 245;

the mode selection module 241 is configured to control mode switching in the automobile environment wind tunnel and generate a mode selection signal;

the emergency stop module 242 is configured to receive an emergency stop operation and a reset operation input by an operator, and generate an emergency stop signal and a reset signal;

the gas detection monitoring module 243 is configured to receive a hazardous gas alarm signal sent by a gas detection system;

the high-pressure water mist monitoring module 244 is used for receiving a fire alarm signal of the parking test vehicle, which is monitored by a fire probe of the high-pressure water mist system;

the safety matrix logic module 245 is configured to receive the emergency stop and fault data of each process equipment subsystem and the state information of each door in the automobile environment wind tunnel, perform logic operation on the emergency stop and fault data, the state information, the mode selection signal, the emergency stop signal, the reset signal, the hazardous gas alarm signal, and the fire alarm signal according to a preset safety matrix, and send an operation result to each process equipment subsystem.

Specifically, in the scheme provided in the embodiment of the present application, the mode selection module of the safety control subsystem 24 is configured to implement control switching of the wind tunnel operation modes, including switching of four modes, i.e., shutdown, preparation, air conditioning, and test. The emergency stop module 242 is provided with a plurality of emergency stop buttons and a reset button, the emergency stop buttons are respectively arranged near the control room operating console, the wind tunnel parking access door and the test vehicle, and emergency stop can be performed on the wind tunnel at each position when emergency occurs by a control room operator, a parking room test preparer and a test vehicle driver. When the sudden stop is cancelled, the sudden stop state needs to be reset by using a reset button. The gas detection monitoring module 243 is used for receiving various dangerous gas alarms sent by the gas detection system, and the high-pressure water mist monitoring module 244 is used for receiving a fire alarm signal of the parking test vehicle, which is monitored by a fire probe of the high-pressure water mist system. The safety matrix logic module 245 monitors various safety-related signals of the wind tunnel, and outputs an emergency stop signal to related equipment when emergency stop output exists according to a logic operation result of the safety matrix.

In various modes, the safety control subsystem 24 monitors the safety states of the wind tunnel, such as dangerous gas concentration alarm, fire alarm, emergency stop button, door opening and closing, and the like in real time according to the safety matrix logic, so as to ensure the operation safety of the wind tunnel. Meanwhile, a test flow communication module of the process control subsystem 21 communicates with the environment control subsystem 22, the public power control subsystem 23, the safety control subsystem 24 and the wind tunnel master control system in real time, control instructions are forwarded and parameter state feedback is carried out, and an energy monitoring module monitors, counts and records the power consumption of all equipment in real time.

In the scheme provided by the embodiment of the application, the definition and the switching of various modes of the wind tunnel are realized by configuring the independent safety control subsystem 24, the safety state of main equipment, dangerous gas and the like are monitored according to the preset safety matrix, and instructions with different safety levels are sent to corresponding systems according to different risk levels, so that the independent safety state monitoring and response are realized.

In the scheme provided by the embodiment of the application, the target configuration parameter information of each process equipment subsystem 3 is given through the computer equipment 1, then the control subsystem 2 automatically and integrally generates the control instruction according to the target configuration parameter information and the preset control strategy, and then each process equipment subsystem 3 is controlled through the control instruction, namely, the scheme provided by the embodiment of the application automatically calls and controls the parameters and the time sequence of the related function modules through the control subsystem, so that the automatic and integrally control of each process equipment subsystem 3 is realized, and further, the automation degree and the control efficiency of the process equipment control system are improved.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A control system for automobile environment wind tunnel process equipment is characterized by comprising the following components: computer equipment, a control subsystem and a plurality of process equipment subsystems in an automobile environment wind tunnel, wherein,

2. The system of claim 1, wherein the control subsystem comprises: a process control subsystem, an environmental control subsystem, and a utility power control subsystem, wherein,

3. The system of claim 2, wherein the automotive environmental wind tunnel comprises a ready mode, an air conditioning mode, a test mode, and a shutdown mode;

the preset control strategy comprises the following steps:

4. The system of claim 3, wherein the environmental control subsystem comprises: the system comprises a temperature control module, a fresh air and humidity control module, a tail row control module and a rain and snow control module;

5. The system of claim 4, wherein the utility control subsystem comprises: the system comprises a compressed air control module, a cooling water control module, a hot water control module and a steam control module; wherein the content of the first and second substances,

6. The system of any one of claims 2 to 5, wherein the temperature control module is specifically configured to:

7. The system as claimed in claim 6, wherein modulating the frequency of the normal temperature refrigeration branch and the cooling water temperature according to the target temperature of the normal temperature refrigeration branch and the target frequency of the normal temperature variable frequency water pump comprises:

judging whether the normal temperature refrigeration branch is closed or not;

8. The system of any one of claims 2 to 5, wherein the compressed air control module is specifically configured to:

9. The system of claim 8, wherein the cooling water control module is specifically configured to:

judging whether to stop the automatic cooling water adjusting process;

10. The system of any one of claims 3 to 5, wherein the control subsystem further comprises: a safety control subsystem; the safety control subsystem comprises: the system comprises a mode selection module, an emergency stop module, a gas detection monitoring module, a high-pressure fine water monitoring module and a safety matrix logic module;