CN112822805A - Windshield glass electric heating control circuit, control method and system - Google Patents
Windshield glass electric heating control circuit, control method and system Download PDFInfo
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- CN112822805A CN112822805A CN201911116990.4A CN201911116990A CN112822805A CN 112822805 A CN112822805 A CN 112822805A CN 201911116990 A CN201911116990 A CN 201911116990A CN 112822805 A CN112822805 A CN 112822805A
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- China
- Prior art keywords
- windshield glass
- heating
- windshield
- command relay
- temperature
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
- H05B3/845—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields specially adapted for reflecting surfaces, e.g. bathroom - or rearview mirrors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
Abstract
A windshield glass electric heating control circuit, control method and system comprises: when the environmental temperature is lower than a preset temperature threshold value, the windshield glass heating command relay is closed, and a normally open contact of the windshield glass heating command relay is closed; when the ambient temperature is lower than a preset first threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environmental temperature is higher than a preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected; when the ambient temperature is higher than a preset second threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated. By adopting the scheme in the application, the temperature threshold value of the electric heating of the windshield glass can be adjusted according to the climate and the season of the place where the rail vehicle runs, and the windshield glass or the overheat protection device of the windshield glass does not need to be replaced.
Description
Technical Field
The application relates to a railway vehicle technology, in particular to a windshield glass electric heating control circuit, a control method and a system.
Background
The electric heating glass is an optical transparent material which has certain light transmittance and can realize heating after being electrified. Its main function is under the prerequisite that guarantees that the driver has good field of vision, realizes can deicing, defrosting, defogging under adverse circumstances, provides good sight for the driver to observe information such as signal and road conditions, thereby the guarantee safety of traveling. The electrical heating performance is an important index affecting the function, reliability and service life of the windshield.
The traditional control mode is that a switch is arranged to control the heating of the glass, when the switch is turned to an 'on' gear, the windshield glass starts to be heated, and during the heating period, the glass automatically cuts off or switches on the electric heating according to the heating temperature range; and when the gear is turned to the 'off' position, the windshield glass stops heating.
Problems existing in the prior art:
the traditional control mode only controls the on/off of the electric heating of the windshield glass, and cannot control the temperature range of the glass heating.
Disclosure of Invention
The embodiment of the application provides a windshield glass electric heating control circuit, a control method and a system, so as to solve the technical problems.
According to a first aspect of embodiments of the present application there is provided a windscreen electrical heating control circuit comprising: an electric heating glass control circuit breaker, a windshield glass heating command relay, a windshield glass overheating protection device, a windshield glass heating switch and a windshield glass heating contactor, wherein the electric heating glass control circuit breaker, the windshield glass heating command relay, the windshield glass overheating protection device, the windshield glass heating switch and the windshield glass heating contactor are connected in series in sequence, wherein,
when the environmental temperature is lower than a preset temperature threshold value, the windshield glass heating command relay is closed, and a normally open contact of the windshield glass heating command relay is closed; when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated;
when the environmental temperature is higher than the preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
According to a second aspect of the embodiments of the present application, there is provided a windshield glass electrical heating control method, including:
monitoring the ambient temperature;
when the environmental temperature is lower than a preset temperature threshold value, controlling the windshield glass heating command relay to be closed, and controlling the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is lower than the preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated;
when the environmental temperature is higher than the preset temperature threshold value, controlling the windshield glass heating command relay not to be attracted and the normally open contact of the windshield glass heating command relay to be disconnected; when the environmental temperature is higher than the preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is not attracted, and the windshield glass is not heated;
wherein the windshield heating command relay is connected in series in the windshield heating control circuit.
According to a third aspect of embodiments of the present application there is provided a windscreen electrical heating control system comprising: the air conditioning system comprises an air conditioning unit and a temperature sensor, wherein the temperature sensor is used for monitoring the ambient temperature, the air conditioning system comprises a windshield glass heating command relay, and a normally open contact of the windshield glass heating command relay is connected in series with a windshield glass overheating protection device, a windshield glass heating switch and a windshield glass heating contactor of the windshield glass electric heating control circuit;
when the environmental temperature is lower than a preset temperature threshold value, the air conditioning system controls the windshield glass heating command relay to be closed and the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is higher than the preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected;
when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
According to a fourth aspect of embodiments herein there is provided a windscreen electrical heating control system comprising: the train control and management system TCMS, the air conditioning system and the electric heating control circuit of the windshield glass, the electric heating control circuit of the windshield glass comprises an electric heating glass control circuit breaker, a heating command relay of the windshield glass, an overheating protection device of the windshield glass, a heating switch of the windshield glass and a heating contactor of the windshield glass which are connected in series; the windshield glass heating command relay is connected with a DO port of the TCMS; the air conditioning system comprises an air conditioning unit and a temperature sensor, wherein the temperature sensor is used for monitoring the ambient temperature; the air conditioning system is used for transmitting the ambient temperature to the TCMS through a network;
the TCMS is used for controlling a DO port to output a first level when the environmental temperature is lower than a preset temperature threshold value, and further controlling the windshield glass heating command relay to be closed and the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is higher than a preset temperature threshold value, controlling a DO port to output a second level, and further controlling the windshield glass heating command relay not to be attracted and the normally open contact of the windshield glass heating command relay to be disconnected;
when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
By adopting the windshield glass electric heating control circuit, the method and the system provided by the embodiment of the application, an environment temperature signal is introduced into the windshield glass heating control circuit, the windshield glass heating command relay is added, the windshield glass heating command relay controls the windshield glass to work according to the environment temperature and the preset temperature threshold value, the temperature threshold value of the windshield glass electric heating can be adjusted according to the climate and the season of the place where the rail vehicle runs, and the windshield glass or the overheat protection device of the windshield glass does not need to be replaced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 shows a schematic of a heating control circuit for a prior art electrical heating control scheme for a windshield;
FIG. 2 shows a schematic diagram of a heating main power supply circuit for a prior art electrical heating control scheme for a windshield;
FIG. 3 shows a schematic diagram of a prior art electrical heating workflow for a windshield;
FIG. 4 is a schematic diagram illustrating an electrical heating control circuit for a windshield of an embodiment of the present application;
FIG. 5 is a flow chart illustrating an implementation of the electric heating control method for windshield glass in the second embodiment of the present application;
FIG. 6 is a schematic circuit diagram of a part of an air conditioning system in the third embodiment of the present application;
FIG. 7 is a schematic circuit diagram of an electric heating control system for windshield glass in the third embodiment of the present application;
fig. 8 is a schematic circuit diagram of a part of a network system according to a fourth embodiment of the present application;
fig. 9 shows a schematic circuit diagram of an electric heating control system for windshield glass in the fourth embodiment of the present application.
Detailed Description
In the process of implementing the present application, the inventors found that:
the electrical heating of the windscreen involves a temperature range and an overheating protection device:
(1) temperature range: the electrically heated windshield has a temperature range that does not change once the temperature range is determined for the same electrically heated windshield.
(2) An overheating protection device: the electrically heated windscreen is provided with an overheat protection device for controlling the heating of the windscreen, which overheat protection device can be integrated in the windscreen or separate from the windscreen. During the heating process of the windshield, the functions of the overheating protection device are as follows: when the glass temperature reaches 44 ℃, the normally closed contact of the overheating protection device is disconnected, the windshield glass heating contactor is 64-Q01 not attracted, the main contact of 64-Q01 is disconnected, and the electric heating stops working; when the glass temperature is reduced to below 32 ℃, the normally closed contact of the overheating protection device is closed, the windshield glass heating contactor is switched on at 64-Q01, the main contact at 64-Q01 is closed, and the electric heating starts to heat again.
Figure 1 shows a schematic of the heating control circuit of a prior art electrical heating control scheme for a windscreen.
As shown in the figure, the circuit is a dc voltage supply and comprises a windscreen heating button/switch (with a light button), a windscreen overheating protection device, and a windscreen heating contactor, wherein one end of the windscreen overheating protection device is connected with an electric heating glass control circuit breaker, the other end of the windscreen overheating protection device is connected with the windscreen heating switch, and the other end of the windscreen heating switch is connected with the windscreen heating contactor.
Figure 2 shows a schematic diagram of the heating main power supply circuit of a prior art electrical heating control scheme for a windscreen.
As shown in the figure, the circuit is supplied by alternating voltage, one end of the windshield glass heating contactor is connected with the electric heating glass power supply circuit breaker, and the other end of the windshield glass heating contactor is connected with the windshield glass.
Figure 3 shows a schematic diagram of the electrical heating workflow of a prior art windshield.
As shown, the windshield heating button/switch is pressed, the windshield is heated according to the flow shown in fig. 3, the windshield button is reset, and electrical heating is not active.
As can be seen from fig. 3, the temperature range of the overheating protection device is a key influence factor of glass heating, the windshield glass works in the temperature range of 32 ℃ to 44 ℃, when the temperature of the glass reaches 44 ℃, the normally closed contact of the overheating protection device is disconnected, and the electric heating stops working; when the glass temperature drops below 32 ℃, the normally closed contact of the overheating protection device is closed, and the electric heating restarts heating.
For electrical heating of the windscreen, its temperature range cannot be changed once it has been determined. If one wants to change the temperature range in which the windscreen is electrically heated, for example, changing the temperature range from 32 ℃ to 44 ℃ to 22 ℃ to 44 ℃ (changing the lower limit temperature value, not changing the upper limit temperature value, since the windscreen has already been heated to a state of defogging, frost, etc.) it is necessary to replace the overheating protection device (in the case where the overheating protection device is mounted separately from the windscreen) or the entire windscreen (in the case where the overheating protection device is integrated with the windscreen).
For the electric heating of the windshield glass, the working temperature range of the windshield glass sometimes needs to be set according to seasons and environments, and the working temperature range of the windshield glass cannot be changed by the existing electric heating control scheme of the windshield glass.
The temperature range of the existing windshield glass for electric heating cannot be changed, if the temperature range is required to be changed, only an overheat protection device or a whole piece of windshield glass can be replaced, the cost for changing the temperature range is high, and the windshield glass which is loaded on a vehicle also relates to dismounting, so that the influence on vehicle production is large.
In view of the above problems, embodiments of the present application provide a control circuit, method, and system for electrically heating a windshield glass, in which an air conditioning system and a network system control a relay according to a temperature detected by a temperature sensor of the air conditioning system, so as to control the operation of an electric heating glass, and change the operating temperature range of the electrically heated windshield glass is achieved without replacing an overheat protection device or the windshield glass.
The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example one
Fig. 4 shows a schematic structural diagram of an electric heating control circuit of a windshield glass in an embodiment of the present application.
As shown, the electrical windshield heating control circuit comprises: an electric heating glass control circuit breaker, a windshield glass heating command relay, a windshield glass overheating protection device, a windshield glass heating switch and a windshield glass heating contactor, wherein the electric heating glass control circuit breaker, the windshield glass heating command relay, the windshield glass overheating protection device, the windshield glass heating switch and the windshield glass heating contactor are connected in series in sequence, wherein,
when the environmental temperature is lower than a preset temperature threshold value, the windshield glass heating command relay is closed, and a normally open contact of the windshield glass heating command relay is closed; when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated;
when the environmental temperature is higher than the preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
The embodiment of the application introduces the environmental temperature into a control loop of the windshield glass, so that the working temperature range of the windshield glass is adjusted, the working temperature range of the electrical heating of the windshield glass is adjusted according to the climate and the season of the place where the rail vehicle runs, the overheat protection device of the windshield glass or the windshield glass does not need to be replaced, only the software of an air conditioning system or a vehicle network system needs to be changed, the lower limit value of the working temperature of the electrical heating of the windshield glass is flexibly changed, and the working temperature range of the electrical heating of the windshield glass can be flexibly adjusted according to the running environment of the vehicle.
In one embodiment, the windshield glass heating command relay is controlled by an air conditioning system, a normally open contact of the windshield glass heating command relay is a windshield glass heating command signal of the air conditioning system, the air conditioning system monitors an ambient temperature according to a temperature sensor, and the air conditioning system outputs a normally open contact closing command signal when the ambient temperature is lower than a preset temperature threshold; and when the ambient temperature is higher than a preset temperature threshold value, the air conditioning system outputs a normally open contact opening command signal.
In one embodiment, the windshield heating command relay is controlled by a DO port of a TCMS of a train control and management system, the windshield heating command relay is closed when the DO port of the TCMS outputs a first level, the windshield heating command relay is not closed when the DO port of the TCMS outputs a second level, the TCMS obtains an ambient temperature according to feedback of a temperature sensor of an air conditioning system, and the DO port of the TCMS outputs the first level when the ambient temperature is lower than a preset temperature threshold; and when the environment temperature is higher than the preset temperature threshold, the DO port of the TCMS outputs a second level.
In one embodiment, the air conditioning system or TCMS receives an instruction to change a temperature threshold and modifies the temperature threshold based on the instruction.
In one embodiment, the first level is a high level; the second level is a low level.
Example two
Based on the same inventive concept, the embodiment of the application provides a windshield glass electric heating control method.
Fig. 5 is a flow chart illustrating an implementation of the electric heating control method for windshield glass in the second embodiment of the present application.
As shown, the windshield electrical heating control method comprises:
wherein the windshield heating command relay is connected in series in the windshield heating control circuit.
According to the embodiment of the application, the environmental temperature is introduced into the control circuit of the windshield glass, so that the working temperature range of the windshield glass is adjusted, the working temperature range of the electrical heating of the windshield glass is adjusted according to the climate and the season of the place where the rail vehicle runs, the overheat protection device of the windshield glass or the windshield glass does not need to be replaced, only the software of an air conditioning system or a vehicle network system needs to be changed, the lower limit value of the working temperature of the electrical heating of the windshield glass is flexibly changed, and the working temperature range of the electrical heating of the windshield glass can be flexibly adjusted according to the running environment of the vehicle.
In one embodiment, the windshield glass heating command relay is controlled by an air conditioning system, a normally open contact of the windshield glass heating command relay is a windshield glass heating command signal of the air conditioning system, the air conditioning system monitors an ambient temperature according to a temperature sensor, and the air conditioning system outputs a normally open contact closing command signal when the ambient temperature is lower than a preset temperature threshold; and when the ambient temperature is higher than a preset temperature threshold value, the air conditioning system outputs a normally open contact opening command signal.
In one embodiment, the windshield heating command relay is controlled by a DO port of a TCMS of a train control and management system, the windshield heating command relay is closed when the DO port of the TCMS outputs a first level, the windshield heating command relay is not closed when the DO port of the TCMS outputs a second level, the TCMS obtains an ambient temperature according to feedback of a temperature sensor of an air conditioning system, and the DO port of the TCMS outputs the first level when the ambient temperature is lower than a preset temperature threshold; and when the environment temperature is higher than the preset temperature threshold, the DO port of the TCMS outputs a second level.
In one embodiment, further comprising:
and receiving a temperature threshold changing instruction issued by the air conditioning system or the TCMS, and modifying the temperature threshold according to the instruction.
In one embodiment, the first level is a high level; the second level is a low level.
In one embodiment, the temperature threshold is a lower temperature limit at which the windshield is operating.
EXAMPLE III
Based on the same inventive concept, the embodiment of the present application further provides an electric heating control system for a windshield, which is described below.
FIG. 6 is a schematic circuit diagram of a part of an air conditioning system in the third embodiment of the present application;
fig. 7 shows a schematic circuit diagram of an electric heating control system for windshield glass in the third embodiment of the present application.
As shown, the electrical windshield heating control system comprises: the air conditioning system comprises an air conditioning unit and a temperature sensor, wherein the temperature sensor is used for monitoring the ambient temperature, the air conditioning system comprises a windshield glass heating command relay, and a normally open contact of the windshield glass heating command relay is connected in series with a windshield glass overheating protection device, a windshield glass heating switch and a windshield glass heating contactor of the windshield glass electric heating control circuit;
when the environmental temperature is lower than a preset temperature threshold value, the air conditioning system controls the windshield glass heating command relay to be closed and the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is higher than the preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected;
when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
During specific implementation, a temperature sensor can be arranged at a fresh air inlet of the air conditioning unit, so that the ambient temperature outside the vehicle can be monitored in real time and fed back to the air conditioning unit. A relay (windshield glass heating command relay) is added in a control circuit of the air conditioning unit, when the ambient temperature is lower than a set temperature value, the relay is closed, and a normally open contact of the relay is closed. When the ambient temperature is higher than the set temperature value, the relay is not attracted, and the normally open contact is disconnected. For the temperature set value, only the software of the air conditioning system needs to be changed.
The 'windshield glass heating command' signal of the air conditioning system is the normally open contact of the windshield glass heating command relay, and the normally open contact is added into the windshield glass heating control circuit in the embodiment of the application.
Point N/P of 61-E01 in fig. 7 is a set of normally open contacts of the windshield heating command relay in fig. 6; in comparison to fig. 1, fig. 7 adds a set of normally open contacts to the windshield heating command relay.
In specific implementation, assuming that the temperature range of the windshield glass is required to be changed from 32 ℃ to 44 ℃ to 22 ℃ to 44 ℃, air conditioning system software is set, and the temperature threshold is set to 22 ℃:
when the ambient temperature is lower than 22 ℃, an air conditioner control activation relay is 61-K01, a normally open contact of the relay is closed, at the moment, a windshield glass heating switch is pressed, a heating contactor is 64-Q01 for attraction, and the windshield glass starts to be heated;
when the ambient temperature is higher than 22 ℃, the air conditioner control does not activate the relay 61-K01, the normally open contact is disconnected, the windshield glass heating switch is pressed, the heating contactor 64-Q01 does not attract, and the windshield glass is not heated.
In conclusion, the working temperature of the windshield glass is changed from 32-44 ℃ to 22-44 ℃, and 22 ℃ is the lower line value of the working temperature of the windshield glass.
Example four
Based on the same inventive concept, the embodiment of the present application further provides an electric heating control system for a windshield, which is described below.
Fig. 8 is a schematic circuit diagram of a part of a network system according to a fourth embodiment of the present application;
fig. 9 shows a schematic circuit diagram of an electric heating control system for windshield glass in the fourth embodiment of the present application.
As shown, the electrical windshield heating control system comprises: the train control and management system TCMS, the air conditioning system and the electric heating control circuit of the windshield glass, the electric heating control circuit of the windshield glass comprises an electric heating glass control circuit breaker, a heating command relay of the windshield glass, an overheating protection device of the windshield glass, a heating switch of the windshield glass and a heating contactor of the windshield glass which are connected in series; the windshield glass heating command relay is connected with a DO port of the TCMS; the air conditioning system comprises an air conditioning unit and a temperature sensor, wherein the temperature sensor is used for monitoring the ambient temperature; the air conditioning system is used for transmitting the ambient temperature to the TCMS through a network;
the TCMS is used for controlling a DO port to output a first level when the environmental temperature is lower than a preset temperature threshold value, and further controlling the windshield glass heating command relay to be closed and the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is higher than a preset temperature threshold value, controlling a DO port to output a second level, and further controlling the windshield glass heating command relay not to be attracted and the normally open contact of the windshield glass heating command relay to be disconnected;
when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
During specific implementation, the temperature sensor at the fresh air port of the air conditioning unit can detect the ambient temperature outside the vehicle, and the air conditioning system transmits the detected ambient temperature outside the vehicle to the vehicle TCMS system through the network. A relay is added to the windshield glass heating control circuit and is controlled by a DO port of the TCMS. When the environment temperature outside the vehicle is lower than a set temperature value, a DO port of the TCMS outputs a high level, the relay is closed, and a normally open contact of the relay is closed; when the ambient temperature outside the vehicle is higher than the set temperature value, the DO port of the TCMS has low level output, the relay does not attract at the moment, and the normally open contact of the relay is disconnected. For the temperature set point, only the software of the TCMS system needs to be changed.
The 'windshield glass heating command' signal of the network system is the normally open contact of the relay driven by the network DO, and the normally open contact of the relay is added into the windshield glass heating control circuit in the embodiment of the application.
DO in fig. 8 is a level signal sent by the vehicle TCMS system, and the normally open contact 61-K02 in fig. 9 is a set of normally open contacts 61-K02 in the relay in fig. 8; compared with fig. 1, fig. 9 adds a set of normally open contacts of the relay 61-K02.
In specific implementation, assuming that the temperature range of the windshield glass is required to be changed from 32 ℃ to 44 ℃ to 22 ℃ to 44 ℃, setting network system software, and setting a temperature threshold value to 22 ℃:
when the environment temperature is lower than 22 ℃, a DO port of the TCMS outputs high level, a relay is 61-K02 attracted, a normally open contact of the relay is closed, at the moment, a windshield glass heating switch is pressed, a heating contactor is 64-Q01 attracted, and the windshield glass starts to be heated;
when the ambient temperature is higher than 22 ℃, the DO port of the TCMS outputs low level, the relay is 61-K02 is not attracted, the normally open contact of the relay is disconnected, the windshield glass heating switch is pressed, the heating contactor is 64-Q01 is not attracted, and the windshield glass is not heated.
In conclusion, the working temperature of the windshield glass is changed from 32-44 ℃ to 22-44 ℃, and 22 ℃ is the lower line value of the working temperature of the windshield glass.
According to the temperature detected by the temperature sensor of the air conditioning system, the air conditioning system and the network system can control the relay by using the temperature value to control the work of the electric heating glass; the embodiment of the application can be applied to the existing equipment of the vehicle, namely a temperature sensor of an air conditioning system, and the electric heating working temperature range of the windshield glass can be flexibly adjusted according to the running environment of the vehicle.
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, CD-ROM, 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.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
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 (10)
1. An electrical heating control circuit for a windshield, comprising: an electric heating glass control circuit breaker, a windshield glass heating command relay, a windshield glass overheating protection device, a windshield glass heating switch and a windshield glass heating contactor, wherein the electric heating glass control circuit breaker, the windshield glass heating command relay, the windshield glass overheating protection device, the windshield glass heating switch and the windshield glass heating contactor are connected in series in sequence, wherein,
when the environmental temperature is lower than a preset temperature threshold value, the windshield glass heating command relay is closed, and a normally open contact of the windshield glass heating command relay is closed; when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated;
when the environmental temperature is higher than the preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
2. The circuit of claim 1, wherein the windshield heating command relay is controlled by an air conditioning system, the normally open contact of the windshield heating command relay is a windshield heating command signal of the air conditioning system, the air conditioning system monitors an ambient temperature according to a temperature sensor, and the air conditioning system outputs a normally open contact closing command signal when the ambient temperature is lower than a preset temperature threshold; and when the ambient temperature is higher than a preset temperature threshold value, the air conditioning system outputs a normally open contact opening command signal.
3. The circuit of claim 1 wherein said windshield heating command relay is controlled by a DO port of a TCMS of the train control and management system, said windshield heating command relay being engaged when the DO port of the TCMS outputs a first level and not engaged when the DO port of the TCMS outputs a second level, said TCMS deriving an ambient temperature from feedback from a temperature sensor of the air conditioning system, said ambient temperature being less than a predetermined temperature threshold and the DO port of the TCMS outputting the first level; and when the environment temperature is higher than the preset temperature threshold, the DO port of the TCMS outputs a second level.
4. The circuit of claim 2 or 3, wherein the air conditioning system or TCMS receives an instruction to change a temperature threshold and modifies the temperature threshold in accordance with the instruction.
5. The circuit of claim 3, wherein the first level is a high level; the second level is a low level.
6. A method of controlling by means of an electrical heating control circuit for a windscreen according to any of the preceding claims 1 through 5, comprising:
monitoring the ambient temperature;
when the environmental temperature is lower than a preset temperature threshold value, controlling the windshield glass heating command relay to be closed, and controlling the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is lower than the preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated;
when the environmental temperature is higher than the preset temperature threshold value, controlling the windshield glass heating command relay not to be attracted and the normally open contact of the windshield glass heating command relay to be disconnected; when the environmental temperature is higher than the preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is not attracted, and the windshield glass is not heated;
wherein the windshield heating command relay is connected in series in the windshield heating control circuit.
7. The method of claim 6, further comprising:
and receiving a temperature threshold changing instruction issued by an air conditioning system or TCMS, and modifying the temperature threshold according to the instruction.
8. The method of claim 6, wherein the temperature threshold is a lower temperature limit at which the windshield is operating.
9. An electrical windshield heating control system, comprising: the air conditioning system comprises an air conditioning unit and a temperature sensor, wherein the temperature sensor is used for monitoring the ambient temperature, the air conditioning system comprises a windshield glass heating command relay, and a normally open contact of the windshield glass heating command relay is connected in series with a windshield glass overheating protection device, a windshield glass heating switch and a windshield glass heating contactor of the windshield glass electric heating control circuit;
when the environmental temperature is lower than a preset temperature threshold value, the air conditioning system controls the windshield glass heating command relay to be closed and the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is higher than the preset temperature threshold value, the windshield glass heating command relay does not attract, and a normally open contact of the windshield glass heating command relay is disconnected;
when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
10. An electrical windshield heating control system, comprising: the train control and management system TCMS, the air conditioning system and the electric heating control circuit of the windshield glass, the electric heating control circuit of the windshield glass comprises an electric heating glass control circuit breaker, a heating command relay of the windshield glass, an overheating protection device of the windshield glass, a heating switch of the windshield glass and a heating contactor of the windshield glass which are connected in series; the windshield glass heating command relay is connected with a DO port of the TCMS; the air conditioning system comprises an air conditioning unit and a temperature sensor, wherein the temperature sensor is used for monitoring the ambient temperature; the air conditioning system is used for transmitting the ambient temperature to the TCMS through a network;
the TCMS is used for controlling a DO port to output a first level when the environmental temperature is lower than a preset temperature threshold value, and further controlling the windshield glass heating command relay to be closed and the normally open contact of the windshield glass heating command relay to be closed; when the environmental temperature is higher than a preset temperature threshold value, controlling a DO port to output a second level, and further controlling the windshield glass heating command relay not to be attracted and the normally open contact of the windshield glass heating command relay to be disconnected;
when the environment temperature is lower than a preset temperature threshold value and the windshield glass heating switch is switched on, the windshield glass heating contactor is closed, and the windshield glass starts to be heated; when the environment temperature is higher than the preset temperature threshold value and the windshield heating switch is switched on, the windshield heating contactor is not attracted, and the windshield is not heated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116990.4A CN112822805B (en) | 2019-11-15 | 2019-11-15 | Windshield glass electric heating control circuit, control method and system |
| PCT/CN2019/125375 WO2021093077A1 (en) | 2019-11-15 | 2019-12-13 | Windshield glass electric heating control circuit, control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116990.4A CN112822805B (en) | 2019-11-15 | 2019-11-15 | Windshield glass electric heating control circuit, control method and system |
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| Publication Number | Publication Date |
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| CN112822805A true CN112822805A (en) | 2021-05-18 |
| CN112822805B CN112822805B (en) | 2022-05-17 |
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| CN201911116990.4A Active CN112822805B (en) | 2019-11-15 | 2019-11-15 | Windshield glass electric heating control circuit, control method and system |
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| CN (1) | CN112822805B (en) |
| WO (1) | WO2021093077A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114056581A (en) * | 2021-12-20 | 2022-02-18 | 中国航空工业集团公司西安飞机设计研究所 | Windshield glass heating control method and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117061859B (en) * | 2023-10-12 | 2023-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel test camera monitoring system and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112822805B (en) | 2022-05-17 |
| WO2021093077A1 (en) | 2021-05-20 |
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