阅读说明：本技术 一种热行为数学模型的建立系统 (Thermal behavior mathematical model establishing system ) 是由 谢雪松 黄坤昆 郭海霞 王群 张小玲 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种热行为数学模型的建立系统,针对于待测滑槽机箱,本申请可以通过热源模拟装置进行热源模拟,并通过温度采集装置采集待测滑槽机箱内部多个指定位置的温度数据,最后控制装置便可以根据温度数据构建待测滑槽机箱的热行为数学模型,热行为数学模型可以在解决滑槽机箱散热问题时提供数据和理论支持,从而降低滑槽机箱内车载电子系统的故障率,并且由于可以通过热源模拟装置进行热源类型的指定,从而提高了建立的热行为数学模型的准确性。(The invention discloses a system for establishing a thermal behavior mathematical model, which aims at a chute case to be tested, can perform heat source simulation through a heat source simulation device, and acquire temperature data of a plurality of specified positions in the chute case to be tested through a temperature acquisition device, and finally a control device can establish the thermal behavior mathematical model of the chute case to be tested according to the temperature data.)

1. A system for building a mathematical model of thermal behavior, comprising:

a chute case to be tested;

the heat source simulation device is arranged in the sliding groove box to be tested and used for providing at least one heat source of a specified type;

the temperature acquisition device is arranged in the chute case to be detected and is used for acquiring temperature data of a plurality of specified positions in the chute case to be detected;

and the control device is connected with the temperature acquisition device and used for constructing a thermal behavior mathematical model of the to-be-detected chute case corresponding to the specified type of heat source according to the temperature data.

2. The system for creating a mathematical model of thermal behavior according to claim 1, wherein the heat source simulation means comprises:

a conduction heat source for providing a conduction type heat source in the chute box to be tested through the conduction heat source;

the convection heat source is used for providing a convection type heat source in the chute box to be tested;

a radiant heat source for providing a radiant type heat source through the radiant heat source in the chute box to be tested;

and the wind direction of a cross-flow fan in the sliding chute box to be tested faces the convection heat source.

3. The system for building a mathematical model of thermal behavior according to claim 2, wherein the conductive heat source and the convective heat source comprise a power source, a first switch, a second switch, a temperature controller, a third switch, a conductive heat generating device, a fourth switch, and a convective heat generating device;

the first end of the first switch and the first end of the second switch are both connected with the power supply, the second end of the first switch is connected with the control end of the temperature controller, the temperature controller is respectively connected with the power supply, the controlled end of the third switch and the controlled end of the fourth switch, the second end of the second switch is respectively connected with the first end of the third switch and the first end of the fourth switch, the second end of the third switch is connected with the anode of the conduction heating device, the cathode of the conduction heating device is connected with the cathode of the power supply, the second end of the fourth switch is connected with the anode of the convection heating device, and the cathode of the convection heating device is connected with the cathode of the power supply;

the temperature controller is used for controlling the actual temperature in the sliding chute box to be measured to be the target temperature by controlling the third switch and the fourth switch when the first switch is closed;

wherein the states of the first switch and the second switch are mutually exclusive.

4. The system for building a mathematical model of thermal behavior according to claim 3, wherein the radiant heat source comprises a fifth switch, a voltage regulator, and a radiant heat generating device;

the first end of the fifth switch is connected with the anode of the power supply, the second end of the fifth switch is connected with the anode of the voltage regulator, the control end of the voltage regulator is connected with the radiation heating device, and the cathode of the voltage regulator is connected with the cathode of the power supply;

the voltage regulator is used for regulating the working power of the radiation heating device.

5. The system for building a mathematical model of thermal behavior according to claim 4, further comprising a control panel;

the manual control end of first switch the manual control end of second switch the manual control end of third switch the manual control end of fourth switch the manual control end of fifth switch the manual control end of power the target temperature of thermostat sets for the end and the manual control end of voltage regulator all set up in control panel is last.

6. The system for building a mathematical model of thermal behavior according to claim 3, wherein the conductive heating device is an electric hot plate;

the convection heating device is a positive temperature coefficient thermistor PTC electric heater.

7. The system for building a mathematical model of thermal behavior according to claim 1, wherein the temperature acquisition device comprises:

the analog-to-digital converter is connected with the control device and is used for performing analog-to-digital conversion;

the temperature sensors are respectively arranged at designated space points inside the sliding chute case to be measured, connected with the analog-to-digital converter and used for acquiring temperature data of the space points where the temperature sensors are located.

8. The system for building a mathematical model of thermal behavior according to claim 1, further comprising:

and the display is connected with the control device and used for displaying the thermal behavior mathematical model under the control of the control device.

9. The system for building a mathematical model of thermal behavior according to claim 1, wherein the chute chassis under test is a simulated chute chassis.

10. The system for creating a mathematical model of thermal behavior according to any one of claims 1 to 9, further comprising:

and the shape-walking fan is connected with the control device and used for blowing air to the outside of the sliding chute case to be tested under the control of the control device so as to simulate running air of the train.

Technical Field

The invention relates to the field of thermal behavior mathematical models, in particular to a system for establishing a thermal behavior mathematical model.

Background

The development of high density, high integration and miniaturization of components in a high-speed magnetic suspension traffic system is an irreversible trend, the rapid increase of power density and heat flux density is accompanied, meanwhile, because the complexity of the operating environment needs to carry out closed processing on a chute case of a vehicle-mounted electronic system, the contradiction between heat production and heat dissipation is aggravated, if the vehicle-mounted electronic system cannot be effectively controlled and managed, faults are easily caused, therefore, a thermal behavior mathematical model of a typical chute case is established, and data and theoretical support can be provided for solving the problem of heat dissipation of the chute case.

However, a mature method for establishing a thermal behavior mathematical model of the chute case is lacked in the prior art, so that the heat dissipation problem of the chute case cannot be solved well, and the failure rate of a vehicle-mounted electronic system in the chute case is high.

Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a system for establishing a thermal behavior mathematical model, which is beneficial to reducing the failure rate of an on-vehicle electronic system in a chute case, and can improve the accuracy of the established thermal behavior mathematical model due to the fact that the heat source type can be specified through a heat source simulation device.

In order to solve the above technical problem, the present invention provides a system for establishing a mathematical model of thermal behavior, comprising:

a chute case to be tested;

the heat source simulation device is arranged in the sliding groove box to be tested and used for providing at least one heat source of a specified type;

the temperature acquisition device is arranged in the chute case to be detected and is used for acquiring temperature data of a plurality of specified positions in the chute case to be detected;

and the control device is connected with the temperature acquisition device and used for constructing a thermal behavior mathematical model of the to-be-detected chute case corresponding to the specified type of heat source according to the temperature data.

Preferably, the heat source simulation apparatus includes:

a conduction heat source for providing a conduction type heat source in the chute box to be tested through the conduction heat source;

the convection heat source is used for providing a convection type heat source in the chute box to be tested;

a radiant heat source for providing a radiant type heat source through the radiant heat source in the chute box to be tested;

and the wind direction of a cross-flow fan in the sliding chute box to be tested faces the convection heat source.

Preferably, the conduction heat source and the convection heat source comprise a power supply, a first switch, a second switch, a temperature controller, a third switch, a conduction heating device, a fourth switch and a convection heating device;

the first end of the first switch and the first end of the second switch are both connected with the power supply, the second end of the first switch is connected with the control end of the temperature controller, the temperature controller is respectively connected with the power supply, the controlled end of the third switch and the controlled end of the fourth switch, the second end of the second switch is respectively connected with the first end of the third switch and the first end of the fourth switch, the second end of the third switch is connected with the anode of the conduction heating device, the cathode of the conduction heating device is connected with the cathode of the power supply, the second end of the fourth switch is connected with the anode of the convection heating device, and the cathode of the convection heating device is connected with the cathode of the power supply;

the temperature controller is used for controlling the actual temperature in the sliding chute box to be measured to be the target temperature by controlling the third switch and the fourth switch when the first switch is closed;

wherein the states of the first switch and the second switch are mutually exclusive.

Preferably, the radiant heat source comprises a fifth switch, a voltage regulator and a radiant heat generating device;

the first end of the fifth switch is connected with the anode of the power supply, the second end of the fifth switch is connected with the anode of the voltage regulator, the control end of the voltage regulator is connected with the radiation heating device, and the cathode of the voltage regulator is connected with the cathode of the power supply;

the voltage regulator is used for regulating the working power of the radiation heating device.

Preferably, the system for establishing the thermal behavior mathematical model further comprises a control panel;

the manual control end of first switch the manual control end of second switch the manual control end of third switch the manual control end of fourth switch the manual control end of fifth switch the manual control end of power the target temperature of thermostat sets for the end and the manual control end of voltage regulator all set up in control panel is last.

Preferably, the conduction heating device is an electric hot plate;

the convection heating device is a positive temperature coefficient thermistor PTC electric heater.

Preferably, the temperature acquisition device includes:

the analog-to-digital converter is connected with the control device and is used for performing analog-to-digital conversion;

the temperature sensors are respectively arranged at designated space points inside the sliding chute case to be measured, connected with the analog-to-digital converter and used for acquiring temperature data of the space points where the temperature sensors are located.

Preferably, the system for establishing the mathematical model of thermal behavior further comprises:

and the display is connected with the control device and used for displaying the thermal behavior mathematical model under the control of the control device.

Preferably, the chute case to be tested is a simulated chute case.

Preferably, the system for establishing the mathematical model of thermal behavior further comprises:

and the shape-walking fan is connected with the control device and used for blowing air to the outside of the sliding chute case to be tested under the control of the control device so as to simulate running air of the train.

The invention provides a system for establishing a thermal behavior mathematical model, which aims at a chute case to be tested, can perform heat source simulation through a heat source simulation device, and acquire temperature data of a plurality of specified positions in the chute case to be tested through a temperature acquisition device, and finally a control device can establish the thermal behavior mathematical model of the chute case to be tested according to the temperature data.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a system for building a mathematical model of thermal behavior according to the present invention;

FIG. 2 is a schematic structural diagram of another thermal behavior mathematical model building system provided by the present invention;

FIG. 3 is a schematic structural diagram of a heat source simulation apparatus according to the present invention;

fig. 4 is a schematic structural diagram of a temperature acquisition device provided by the present invention.

Detailed Description

The core of the invention is to provide a system for establishing the thermal behavior mathematical model, which is beneficial to reducing the failure rate of the vehicle-mounted electronic system in the chute case, and the accuracy of the established thermal behavior mathematical model is improved because the heat source type can be specified by the heat source simulation device.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a system for building a mathematical thermal behavior model according to the present invention, where the system for building a mathematical thermal behavior model includes:

a chute case 1 to be tested;

the heat source simulation device 2 is arranged in the chute case 1 to be tested and is used for providing at least one heat source of a specified type;

the temperature acquisition device 3 is arranged in the chute case 1 to be detected and is used for acquiring temperature data of a plurality of specified positions in the chute case 1 to be detected;

and the control device 4 is connected with the temperature acquisition device 3 and is used for constructing a thermal behavior mathematical model of the to-be-detected chute case 1 corresponding to the specified type of heat source according to the temperature data.

Specifically, in view of the technical problems in the background art, in order to analyze the temperature condition in the chute case 1 to be tested, and thus perform effective thermal control and management on the vehicle-mounted electronic system in the chute case, the embodiment of the invention provides a set of mature thermal behavior mathematical model establishing system, and the thermal behavior mathematical model of the chute case 1 to be tested can be established through the system, so that the temperature condition of the chute case 1 to be tested can be predicted, a heat dissipation scheme can be correspondingly designed, and the failure rate of the vehicle-mounted electronic system can be reduced.

Specifically, the chute case 1 to be tested may be of various types, and the applicant considers that the types of the heat sources in the chute case are of various multi-phases, for example, the heat sources may include at least one of a conduction heat source, a convection heat source and a radiation heat source, and under the excitation of the heat sources of different types, the temperature change reflected by the chute case 1 to be tested inevitably differs, so in order to more accurately construct a mathematical model of thermal behavior for the chute case 1 to be tested, the heat source simulation device 2 in the present application may provide at least one heat source of a specified type, so that the mathematical model of thermal behavior constructed by the control device 4 according to the temperature data corresponds to a model corresponding to the "chute case with a heat source of a specific type", and the mathematical model of thermal behavior may be used to analyze the temperature condition of the "chute case with a heat source of a specific type" and design a corresponding heat dissipation scheme, that is to say, the accuracy of the thermal behavior mathematical model is improved, and the fault rate of the vehicle-mounted electronic system is further reduced.

The type and number of the heat sources provided by the heat source simulator 2 may be set independently, for example, at least one of a conduction heat source, a convection heat source, and a radiation heat source may be provided, and the embodiment of the present invention is not limited herein.

Specifically, the designated position acquired by the temperature acquisition device 3 may be set autonomously, which is beneficial to establishing a mathematical model of thermal behavior, and the embodiment of the present invention is not limited herein.

The specific manner of constructing the thermal behavior mathematical model through the temperature data may be various, for example, the three-dimensional temperature distribution field of the chute chassis 1 to be measured may be drawn according to the temperature data, and then the thermal behavior mathematical model may be constructed according to the three-dimensional temperature distribution field, the ambient temperature, and the heat source power.

The invention provides a system for establishing a thermal behavior mathematical model, which aims at a chute case to be tested, can perform heat source simulation through a heat source simulation device, and acquire temperature data of a plurality of specified positions in the chute case to be tested through a temperature acquisition device, and finally a control device can establish the thermal behavior mathematical model of the chute case to be tested according to the temperature data.

For better explaining the embodiment of the present invention, please refer to fig. 2, fig. 2 is a schematic structural diagram of another system for establishing a mathematical model of thermal behavior according to the present invention, and on the basis of the above embodiment:

as a preferred embodiment, the heat source simulation apparatus 2 includes:

the conduction heat source is used for providing a conduction type heat source in the chute case 1 to be tested through the conduction heat source;

the convection heat source is used for providing a convection type heat source in the chute case 1 to be tested through the convection heat source;

a radiant heat source for providing a radiant type heat source in the chute case 1 to be measured therethrough;

wherein, the wind direction of the cross flow fan in the chute case 1 to be tested faces the convection heat source.

Specifically, each heat source can be actively switched on and off and power-regulated, so that the type, the number of types and the heating power provided by each type of heat source can be controlled.

The three heat sources are common three heat sources in the chute case, and are representative.

Of course, the types of heat sources that can be provided by the heat source simulation device 2 may include other types besides the three heat sources, and the embodiment of the present invention is not limited herein.

The convection heat source needs to be correspondingly arranged in the wind direction of the cross flow fan, so that a convection type heat source form is realized.

For better explaining the embodiment of the present invention, please refer to fig. 3, fig. 3 is a schematic structural diagram of a heat source simulation apparatus according to the present invention, and as a preferred embodiment, the conduction heat source and the convection heat source include a power supply AC, a first switch SPST1, a second switch SPST2, a temperature controller Z2, a third switch SPST3, a conduction heat-generating device 21, a fourth switch SPST4 and a convection heat-generating device 22;

a first end of a first switch SPST1 and a first end of a second switch SPST2 are both connected with a power supply AC, a second end of the first switch SPST1 is connected with a control end of a temperature controller Z2, the temperature controller Z2 is respectively connected with the power supply AC, a controlled end of a third switch SPST3 and a controlled end of a fourth switch SPST4, a second end of the second switch SPST2 is respectively connected with a first end of the third switch SPST3 and a first end of a fourth switch SPST4, a second end of the third switch SPST3 is connected with a positive electrode of a conduction heating device 21, a negative electrode of the conduction heating device 21 is connected with a negative electrode of the power supply AC, a second end of the fourth switch SPST4 is connected with a positive electrode of a convection heating device 22, and a negative electrode of the convection heating device 22 is connected with a negative electrode of the power supply AC;

the temperature controller Z2 is used for controlling the actual temperature in the chute chassis 1 to be tested to be the target temperature by controlling the third switch SPST3 and the fourth switch SPST4 when the first switch SPST1 is closed;

the states of the first switch SPST1 and the second switch SPST2 are mutually exclusive.

Specifically, in fig. 3, the DPST1 is a power supply AC switch, the Z1 is a fan in the chassis, that is, a cross-flow fan, the SPST6 is a control switch of the cross-flow fan, and the R1 is a temperature collecting resistor of the temperature controller Z2, and is used for collecting an actual temperature in the chute chassis 1 to be measured.

Specifically, the conduction heating device 21 may be disposed on a side wall inside the chute chassis, so as to implement a conduction heat source, and the convection heating device 22 may be disposed in a wind direction of the cross flow fan, so as to implement a convection heat source.

When the first switch SPST1 is closed, the thermostat Z2 detects an electrical signal sent to the first switch SPST1, so as to start the operation of automatically controlling the temperature (the actual temperature in the chute chassis 1 to be measured is controlled to be the target temperature by controlling the third switch SPST3 and the fourth switch SPST 4), and when the second switch SPST2 is closed, the operator can control the type of the heat source of the operation by manually controlling the third switch SPST3 and the fourth switch SPST4, or of course, the temperature can be indirectly controlled.

Specifically, the circuit in the embodiment of the invention has the advantages of simple structure, low cost, long service life and the like.

Of course, besides this configuration, the configurations of the conduction heat source and the convection heat source may also be other various types, and the embodiment of the present invention is not limited herein.

The first switch SPST1 and the second switch SPST2 may be manually controlled, and the third switch SPST3 and the fourth switch SPST4 may be manually controlled, or may be automatically controlled by the thermostat Z2 when the first switch SPST1 is closed, and the specific types of the switches may be various, which is not limited herein.

As a preferred embodiment, the radiant heat source includes a fifth switch SPST5, a voltage regulator Z3, and a radiant heat generating device 23;

a first end of the fifth switch SPST5 is connected with the positive electrode of the power supply AC, a second end of the fifth switch SPST5 is connected with the positive electrode of the voltage regulator Z3, a control end of the voltage regulator Z3 is connected with the radiant heating device 23, and a negative electrode of the voltage regulator Z3 is connected with the negative electrode of the power supply AC;

a voltage regulator Z3 for regulating the operating power of the radiant heating device 23 by it.

Specifically, the specific configuration of the radiant heat source in the embodiment of the present invention has the advantages of simple structure and low cost.

The radiation heating device 23 may be of various types, such as an infrared heating lamp, and has the advantages of small size, low cost, and long service life, and the embodiment of the invention is not limited herein.

Of course, the radiant heat source may be of other types besides this specific configuration, and embodiments of the present invention are not limited thereto.

As a preferred embodiment, the system for establishing the thermal behavior mathematical model further comprises a control panel;

the manual control end of the first switch SPST1, the manual control end of the second switch SPST2, the manual control end of the third switch SPST3, the manual control end of the fourth switch SPST4, the manual control end of the fifth switch SPST5, the manual control end of the power supply AC, the target temperature setting end of the temperature controller Z2 and the manual control end of the voltage regulator Z3 are all arranged on the control panel.

Specifically, all manual control ends are arranged on the control panel, so that the workers can conveniently perform centralized control, the operation difficulty is reduced, and the working efficiency is improved.

Of course, besides this setting manner, each manual control end may be set at other positions, and the embodiment of the present invention is not limited herein.

As a preferred embodiment, the conduction heating means 21 is an electric hot plate;

the convection heating device 22 is a positive temperature coefficient thermistor PTC electric heater.

Specifically, the electric heating plate and the PTC (Positive Temperature Coefficient) electric heater both have the advantages of small volume, low cost, long service life and the like.

Of course, the conduction heating unit 21 and the convection heating unit 22 may be of various types other than the electric heating plate and the PTC heater, and the embodiment of the present invention is not limited thereto.

For better explaining the embodiment of the present invention, please refer to fig. 4, fig. 4 is a schematic structural diagram of a temperature acquisition device provided in the present invention, and as a preferred embodiment, the temperature acquisition device 3 includes:

the analog-to-digital converter is connected with the control device 4 and is used for performing analog-to-digital conversion;

the temperature sensors are respectively arranged at designated space points in the sliding chute case 1 to be measured, and are connected with the analog-to-digital converter and used for acquiring temperature data of the space points where the temperature sensors are located.

Specifically, the analog-to-digital converter may convert the analog quantity into a digital quantity and provide the digital quantity to the control device 4, so that the control device 4 can directly perform data processing.

The analog-to-digital converter may be of various types, for example, may be a JY-DAM-DS08 acquisition card, and the embodiment of the present invention is not limited herein.

Specifically, the temperature sensors may be of various types, for example, 8-way DS18B20 temperature sensor arrays may be used, two temperature sensor arrays may be adopted in the embodiment of the present invention, and each 8-way DS18B20 temperature sensor array may correspondingly use one JY-DAM-DS08 acquisition card, so that temperature data acquisition of 16 spatial points is realized in total, which is not limited herein in the embodiment of the present invention.

As a preferred embodiment, the system for establishing a mathematical model of thermal behavior further comprises:

a display 5 connected to the control device 4 for displaying the mathematical model of thermal behaviour under the control of the control device 4.

Specifically, in order to facilitate the staff to clearly and accurately know the thermal behavior mathematical model at the first time, the control device 4 in the embodiment of the present invention may control the display 5 to display the thermal behavior mathematical model, which is beneficial to improving the working efficiency.

As a preferred embodiment, the chute chassis 1 to be tested is a simulated chute chassis.

Specifically, the simulated chute case can be used for realizing the construction of a thermal behavior mathematical model at any place, experiments on a train are not needed, and the cost is greatly reduced compared with that of a real chute case.

Specifically, the size of the simulated chute chassis may be L × W × H, which is 100cm × 100cm × 20 cm.

Of course, the chute chassis 1 to be tested may be a real chute chassis besides the simulated chute chassis, and the embodiment of the present invention is not limited herein.

As a preferred embodiment, the control device 4 is a computer.

Specifically, the computer has the advantages of high maturity, excellent performance, strong stability and the like.

Of course, the control device 4 may be of various types other than a computer, and the embodiment of the present invention is not limited herein.

As a preferred embodiment, the system for establishing a mathematical model of thermal behavior further comprises:

and the shape-walking fan is connected with the control device 4 and used for blowing air to the outside of the chute case 1 to be tested under the control of the control device 4 so as to simulate running air of the train.

Specifically, considering that in an actual application scene, running wind generated by train operation acts on the chute case to influence the internal temperature of the chute case, in the embodiment of the invention, in order to further improve the accuracy of the thermal behavior mathematical model, the running fan 6 is arranged to simulate the running wind of the train.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable 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 applied to 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.