Heating control system for controlling windshields with different heating control rates

Abstract

The invention discloses a heating control system for controlling windshields with different heating control rates, which is characterized in that in a power supply input module of the system, power is supplied to a windshield heating control box through a direct-current power supply input unit; the alternating current power supply input unit is connected to a heating cable of an electric heating conductive film of the transparent bulletproof windshield glass through the windshield heating control box, so that the on-off state of the alternating current power supply input unit is controlled through the windshield heating control box; the electric heating conductive film in the transparent bulletproof windshield glass is plated on the inner side of the sapphire layer or the inner side of the inorganic glass layer; the windshield heating control box obtains the coating film type of the transparent bulletproof windshield glass through the windshield type input module, and the processor selects the corresponding control circuit to conduct heating control on the transparent bulletproof windshield glass according to the coating film type. According to the technical scheme provided by the invention, heating control can be carried out on the transparent bulletproof windshield glass with two different configurations by adopting different heating control rates through one heating control box.

Description

Technical Field

[0001] The present invention relates to the field of but not limited to the technical field of helicopter electrically heated transparent bulletproof windshield glass structure design, and in particular to a heating control system for controlling windshields with different heating control rates. Background Art

[0002] The electrically heated transparent bulletproof windshield is installed on the front fuselage of the helicopter as a structural component of the helicopter cockpit. It is an important area for the pilot to observe the outside world and for bulletproof protection. The windshield heating control box is used in conjunction with the transparent bulletproof windshield. The pilot switches the anti-icing switch position of the windshield according to the anti-icing needs. The windshield heating control box makes a judgment based on the temperature signal collected from the built-in temperature sensor of the windshield. By connecting or disconnecting the power supply of the heating element in the glass, the purpose of automatically controlling the temperature of the windshield is achieved, so that the temperature of the windshield is kept within the specified range, the "anti-icing" function of the windshield is realized, and sufficient visibility of the windshield is ensured within the flight envelope.

[0003] Since the transparent bulletproof windshield is composed of more than four layers of materials with greatly different properties, including sapphire transparent ceramics, inorganic glass, organic glass, polycarbonate, etc., the heating conductive film of the transparent bulletproof windshield is usually plated at the following positions: the conductive film is plated on the outermost sapphire, or the conductive film is plated on the inner inorganic glass. Since the control temperature and heating power of the conductive films at the above two different plating positions are different, the heating control rate is different, resulting in one heating control box being unable to control two types of transparent bulletproof windshields, and unable to achieve the field replaceable unit level (LRU level) maintenance during the use and maintenance of the helicopter. Summary of the invention

[0004] The purpose of the present invention is: in response to the above-mentioned technical problems, an embodiment of the present invention provides a heating control system for controlling windshields with different heating control rates, so as to solve the problem that in the existing windshield heating system, since one heating control box can only control one type of transparent bulletproof windshield glass, it is difficult to achieve LRU-level maintenance during the use and maintenance of the helicopter, and the cost of field spare parts is increased.

[0005] The technical solution of the present invention is as follows: the embodiment of the present invention provides a heating control system for controlling windshields with different heating control rates, comprising: a power input module, a windshield heating control box and a transparent bulletproof windshield glass;

[0006] Wherein, the power input module includes: a DC power input unit and an AC power input unit, which is used to supply power to the windshield heating control box through the DC power input unit;

[0007] The AC power input unit is connected to the heating cable of the electric heating conductive film of the transparent bulletproof windshield through the windshield heating control box, so as to control the on and off state of the AC power input unit through the windshield heating control box;

[0008] The transparent bulletproof windshield glass comprises: a plurality of material layers, an electrically heated conductive film and a temperature sensor plated on one of the material layers; wherein the plurality of material layers comprises a sapphire layer, an inorganic glass layer, an organic glass layer and a polycarbonate layer arranged in sequence from the outside to the inside, and the electrically heated conductive film is plated on the inside of the sapphire layer or on the inside of the inorganic glass layer;

[0009] The windshield heating control box includes: an electrically connected windshield type input module and a processor, wherein the windshield type input module is electrically connected to a heating cable of the transparent bulletproof windshield glass; the windshield heating control box is used to obtain the coating type of the transparent bulletproof windshield glass through the windshield type input module, and the processor selects a corresponding control circuit according to the coating type to perform heating control on the transparent bulletproof windshield glass.

[0010] Optionally, in the heating control system for controlling windshields with different heating control rates as described above,

[0011] For the first configuration transparent bulletproof windshield glass having an electrically heated conductive film coated on a sapphire layer, and the second configuration transparent bulletproof windshield glass having an electrically heated conductive film coated on an inorganic glass layer, the anti-icing control temperature and the heating power are different.

[0012] Optionally, in the heating control system for controlling windshields with different heating control rates as described above, the windshield heating control box further includes: a temperature acquisition module;

[0013] The input end of the temperature acquisition and processing module is connected to the temperature sensor of the transparent bulletproof windshield, and the output end is connected to the processor;

[0014] The windshield heating control box is also used to collect the temperature of the transparent bulletproof windshield glass in real time through the temperature collection module and feed it back to the processor. When the fed-back temperature is lower than the lower limit of the heating temperature threshold, heating is started, and when it is higher than the upper limit of the heating temperature threshold, heating is stopped. When the fed-back temperature is higher than the over-limit temperature threshold, a fault alarm signal is output through the processor to stop the heating work.

[0015] Optionally, in the heating control system for controlling windshields with different heating control rates as described above, the windshield heating control box further includes: a power-on self-test module;

[0016] The first input end of the power-on self-test module is connected to the path between the temperature acquisition module and the temperature sensor, the second input end is connected to the path between the AC power input unit and the electric heating conductive film, and the output end is connected to the path between the temperature acquisition module and the processor;

[0017] The windshield heating control box is also used to detect the path formed between the temperature sensor and the temperature acquisition module in the transparent bulletproof windshield glass, and to detect the heating current of the path formed between the AC power input unit and the electric heating conductive film. When a path fault is detected, the heating function is stopped.

[0018] Optionally, in the heating control system for controlling windshields with different heating control rates as described above,

[0019] A loop cable is arranged on the heating cable of the transparent bulletproof windshield of the first configuration, and a disconnect cable is arranged on the heating cable of the transparent bulletproof windshield of the second configuration; or,

[0020] A disconnect cable is provided on the heating cable of the transparent bulletproof windshield of the first configuration, and a loop cable is provided on the heating cable of the transparent bulletproof windshield of the second configuration;

[0021] Among them, the loop cable or the disconnect cable is respectively connected to the electrically connected windshield type input module, one end of the loop cable or the disconnect cable is grounded through the electrically connected windshield type input module, and the other end is connected to the processor through the electrically connected windshield type input module.

[0022] Optionally, in the heating control system for controlling windshields with different heating control rates as described above,

[0023] The windshield heating control box obtains the coating type of the transparent bulletproof windshield glass through the windshield type input module in the following manner:

[0024] Before the transparent bulletproof windshield starts to perform heating control, the loop cable or the broken cable set on the transparent bulletproof windshield is detected through the windshield type input module to form a 0 / 1 discrete signal input to the processor MCU. The loop cable is signal 0, indicating the heating control rate of a windshield of one configuration, and the broken cable is signal 1, indicating the heating control rate of another configuration of the windshield.

[0025] Optionally, in the heating control system for controlling windshields with different heating control rates as described above,

[0026] The processor includes two control circuits, which determine the configuration of the windshield according to the discrete quantity signal input from the windshield type input module, select the corresponding control circuit for heating control, and the anti-icing control temperature and heating power of different control circuits are different.

[0027] Optionally, in the heating control system for controlling windshields with different heating control rates as described above,

[0028] The resistance value of the electrically heated conductive film in the second-configuration transparent bullet-proof windshield is much lower than the resistance value of the electrically heated conductive film in the first-configuration transparent bullet-proof windshield.

[0029] Optionally, in the heating control system for controlling windshields with different heating control rates as described above, the AC power input unit adopts a three-phase AC 115V power input unit;

[0030] The electric heating conductive film includes a three-phase heating resistor, which is connected to a three-phase AC 115V power input unit in a delta connection form.

[0031] The three-phase cable of the AC power input unit in the power input module is divided into two cables at the output end of the internal relay of the windshield heating control box, forming a total of 6 cables; the 6 cables are connected to the three-phase heating resistor in a triangle connection, wherein a line voltage is formed between A1 and B1, a line voltage is formed between B2 and C2, and a line voltage is formed between C1 and A2.

[0032] Optionally, in the heating control system for controlling windshields with different heating control rates as described above,

[0033] For the transparent bulletproof windshield glass of the first configuration in which the electric heating conductive film is plated on the sapphire layer, the temperature sensor is arranged on the electric heating conductive film on the outermost sapphire layer of the transparent bulletproof windshield glass;

[0034] For the second configuration transparent bulletproof windshield glass having an electrically heated conductive film plated on an inorganic glass layer, the temperature sensor is arranged on the electrically heated conductive film of the inorganic glass layer of the inner layer of the transparent bulletproof windshield glass;

[0035] The upper and lower limits of the heating temperature threshold in the second configuration transparent bullet-proof windshield are both higher than the upper and lower limits of the heating temperature threshold in the first configuration transparent bullet-proof windshield.

[0036] The beneficial technical effects of the present invention are as follows: a heating control system for controlling a windshield with different heating control rates proposed in an embodiment of the present invention comprises a power input module, a windshield heating control box and a transparent bulletproof windshield; wherein the power input module comprises: a DC power input unit and an AC power input unit, power is supplied to the windshield heating control box through the DC power input unit; the AC power input unit is connected to a heating cable of an electrically heated conductive film of the transparent bulletproof windshield through the windshield heating control box, so as to control the on / off state of the AC power input unit through the windshield heating control box; in addition, the electrically heated conductive film in the transparent bulletproof windshield is plated on the inside of a sapphire layer or on the inside of an inorganic glass layer; the windshield type input module in the windshield heating control box is electrically connected to the heating cable of the transparent bulletproof windshield; the windshield heating control box is used to obtain the coating type of the transparent bulletproof windshield through the windshield type input module, and the processor selects a corresponding control circuit according to the coating type to perform heating control on the transparent bulletproof windshield. The heating control system adopting this structural form can realize control of different heating control rates for transparent bulletproof windshields of different configurations; it not only realizes the electric heating function of the transparent bulletproof windshield, but also realizes the use of one heating control box to perform heating control on two transparent bulletproof windshields of different configurations with different heating control rates, thereby achieving LRU-level replacement of the heating control system during field use, greatly reducing the field spare parts cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0038] Figure 1 A schematic diagram of the overall structure of a heating control system for controlling windshields with different heating control rates provided by an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the connection between the windshield type input module and the loop cable of the transparent bulletproof windshield glass which are electrically connected in the heating control system for controlling windshields with different heating control rates provided by an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the connection between the electrically connected windshield type input module and the disconnect cable of the transparent bulletproof windshield glass in a heating control system for controlling windshields with different heating control rates provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0042] The above background technology has already explained the importance of electrically heated transparent bulletproof windshield glass in helicopter structures. In the existing windshield heating system, since one heating control box can only control one type of transparent bulletproof windshield glass, it is difficult to achieve LRU-level maintenance during the use and maintenance of the helicopter, and the cost of field spare parts is increased.

[0043] In response to the above problems, an embodiment of the present invention provides a heating control system for controlling windshields with different heating control rates, which enables anti-icing control of two windshields with different configurations by using one heating control box, achieves LRU-level maintenance of the windshield heating system during field use, and greatly reduces the cost of field spare parts.

[0044] The present invention provides the following specific embodiments which can be combined with each other. The same or similar concepts or processes may not be described in detail in some embodiments.

[0045] Figure 1 The overall structure diagram of a heating control system for controlling windshields with different heating control rates provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the components of the heating control system for controlling a windshield with different heating control rates provided by the embodiment of the present invention include: a power input module, a windshield heating control box and a transparent bulletproof windshield glass.

[0046] like Figure 1 In the heating control system shown, the power input module includes: a DC power input unit and an AC power input unit, which is used to supply power to the windshield heating control box through the DC power input unit.

[0047] The AC power input unit in the embodiment of the present invention is connected to the electric heating conductive film heating cable of the transparent bulletproof windshield through the windshield heating control box, so that the on and off state of the AC power input unit can be controlled by the windshield heating control box.

[0048] The transparent bulletproof windshield in the embodiment of the present invention includes: a multi-layer material layer, an electric heating conductive film and a temperature sensor coated on one of the material layers; wherein the multi-layer material layer includes a sapphire layer, an inorganic glass layer, an organic glass layer and a polycarbonate layer arranged in sequence from the outside to the inside, and the electric heating conductive film can be coated on the inside of the sapphire layer or on the inside of the inorganic glass layer.

[0049] The windshield heating control box in the embodiment of the present invention includes: an electrically connected windshield type input module and a processor, the windshield type input module is electrically connected to the heating cable of the transparent bulletproof windshield glass; the windshield heating control box is used to obtain the coating type of the transparent bulletproof windshield glass through the windshield type input module, and the processor selects the corresponding control circuit according to the coating type to control the heating of the transparent bulletproof windshield glass.

[0050] In one implementation of an embodiment of the present invention, for a first configuration transparent bulletproof windshield glass having an electric heating conductive film coated on a sapphire layer, and a second configuration transparent bulletproof windshield glass having an electric heating conductive film coated on an inorganic glass layer; since the thermal conductivity of inorganic glass is much lower than the thermal conductivity of sapphire material, the anti-icing control temperature and heating power of the transparent bulletproof windshield glasses of the above two configurations are different.

[0051] In one implementation of the embodiment of the present invention, Figure 1 The windshield heating control box may also include: a temperature acquisition module; the input end of the temperature acquisition processing module is connected to the temperature sensor of the transparent bulletproof windshield glass, and the output end is connected to the processor; the temperature acquisition processing module can realize the automatic heating control function and the overheating protection function.

[0052] In this implementation, the windshield heating control box can collect the temperature of the transparent bulletproof windshield glass in real time through the temperature acquisition module and feed it back to the processor. When the feedback temperature is lower than the lower limit of the heating temperature threshold, heating starts, and when it is higher than the upper limit of the heating temperature threshold, heating stops. When the feedback temperature is higher than the over-limit temperature threshold, a fault alarm signal is output through the processor, that is, the high temperature over-limit function is realized to stop the heating work.

[0053] In one implementation of the embodiment of the present invention, Figure 1 The windshield heating control box may further include: a power-on self-test module; a first input end of the power-on self-test module is connected to the path between the temperature acquisition module and the temperature sensor, a second input end is connected to the path between the AC power input unit and the electric heating conductive film, and an output end is connected to the path between the temperature acquisition module and the processor;

[0054] In this implementation, the windshield heating control box is also used to detect the path formed between the temperature sensor and the temperature acquisition module in the transparent bulletproof windshield glass, and to detect the heating current of the path formed between the AC power input unit and the electric heating conductive film. When a path fault is detected, the fault is fed back to the processor, thereby stopping the heating function through processor control, that is, the processor disconnects the path between the AC power input unit and the electric heating conductive film.

[0055] In an optional implementation of an embodiment of the present invention, a loop cable is provided on the heating cable of a first-configuration transparent bulletproof windshield glass, and a disconnecting cable is provided on the heating cable of a second-configuration transparent bulletproof windshield glass; in another optional implementation of an embodiment of the present invention, a disconnecting cable is provided on the heating cable of a first-configuration transparent bulletproof windshield glass, and a loop cable is provided on the heating cable of a second-configuration transparent bulletproof windshield glass.

[0056] like Figure 2 As shown, it is a schematic diagram of the connection between the windshield type input module electrically connected in the heating control system for controlling windshields with different heating control rates provided by an embodiment of the present invention and the loop cable of the transparent bulletproof windshield glass; Figure 3 , which is a schematic diagram of the connection between the electrically connected windshield type input module and the disconnecting cable of the transparent bulletproof windshield glass in the heating control system for controlling windshields with different heating control rates provided by an embodiment of the present invention.

[0057] In this implementation, the loop cable or the disconnect cable is respectively connected to the electrically connected windshield type input module, one end of the loop cable or the disconnect cable is grounded through the electrically connected windshield type input module, and the other end is connected to the processor through the electrically connected windshield type input module.

[0058] Since the anti-icing control temperature and heating power of windshields of different configurations are different, the corresponding control modes of the two configurations of transparent bulletproof windshields are judged and the correct heating control rate is selected by setting the connection form of the loop cable or the disconnect cable.

[0059] In one implementation of the embodiment of the present invention, the windshield heating control box obtains the coating type of the transparent bulletproof windshield glass through the windshield type input module in the following manner:

[0060] Before the transparent bulletproof windshield starts to perform heating control, the loop cable or the broken cable set on the transparent bulletproof windshield is detected through the windshield type input module to form a 0 / 1 discrete signal input to the processor MCU. The loop cable is signal 0, indicating the heating control rate of a windshield of one configuration, and the broken cable is signal 1, indicating the heating control rate of another configuration of the windshield.

[0061] Corresponding to the different heating control rates of the two types of transparent bulletproof windshields mentioned above, the processor includes two control circuits, which determine the configuration of the windshield according to the discrete quantity signal input from the windshield type input module, select the corresponding control circuit for heating control, and the anti-icing control temperature and heating power of different control circuits are different.

[0062] It should be noted that, in the embodiment of the present invention, the resistance value of the electrically heated conductive film in the second configuration transparent bulletproof windshield glass needs to be much lower than the resistance value of the electrically heated conductive film in the first configuration transparent bulletproof windshield glass.

[0063] Since the thermal conductivity of inorganic glass is much lower than that of sapphire, when the electric heating film is plated on inorganic glass, its resistance value needs to be much lower than that plated on sapphire in order to increase the heating power.

[0064] In an implementation of the embodiment of the present invention, the AC power input unit is, for example, a three-phase AC 115V power input unit.

[0065] In this implementation, the electric heating conductive film includes a three-phase heating resistor, which is connected to the three-phase AC 115V power input unit in a triangle form; the resistance values ​​of the three-phase heating resistors in the electric heating conductive film are equivalent, which is conducive to increasing the line voltage. Under the condition of constant power, the heating resistor can be increased and the thickness of the heating resistor can be reduced, thereby improving the transmittance.

[0066] like Figure 1 As shown, the three-phase cable of the AC power input unit in the power input module is divided into two cables at the output end of the internal relay of the windshield heating control box, forming a total of 6 cables; the 6 cables are connected to the three-phase heating resistor in a triangle connection form, wherein a line voltage is formed between A1 and B1, a line voltage is formed between B2 and C2, and a line voltage is formed between C1 and A2.

[0067] Since the three-phase cable of the AC power input unit and the three-phase heating resistor are connected in a triangle, the line voltage value U=√3×115V≈199.2V, which greatly increases the line voltage. Under the condition of constant power, the resistance value R on the transparent bulletproof windshield is calculated by the following formula:

[0068] R=U 2 / P;

[0069] According to the formula, when the power P is constant, the resistance value R on the transparent bulletproof windshield can be increased by increasing the line voltage U, thereby reducing the thickness of the heating resistor and achieving the purpose of improving the transmittance.

[0070] In one implementation of the embodiment of the present invention, for a transparent bullet-proof windshield of the first configuration in which an electrically heated conductive film is plated on a sapphire layer, a temperature sensor is disposed on the electrically heated conductive film of the outermost sapphire layer of the transparent bullet-proof windshield. In addition, for a transparent bullet-proof windshield of the second configuration in which an electrically heated conductive film is plated on an inorganic glass layer, a temperature sensor is disposed on the electrically heated conductive film of the inorganic glass layer of the inner layer of the transparent bullet-proof windshield.

[0071] It should be noted that the upper and lower limits of the heating temperature threshold in the second configuration transparent bullet-proof windshield are both higher than the upper and lower limits of the heating temperature threshold in the first configuration transparent bullet-proof windshield.

[0072] The heating control system for controlling a windshield with different heating control rates provided in an embodiment of the present invention comprises a power input module, a windshield heating control box and a transparent bulletproof windshield; wherein the power input module comprises: a DC power input unit and an AC power input unit, and power is supplied to the windshield heating control box through the DC power input unit; the AC power input unit is connected to a heating cable of an electrically heated conductive film of the transparent bulletproof windshield through the windshield heating control box, so as to control the on / off state of the AC power input unit through the windshield heating control box; in addition, the electrically heated conductive film in the transparent bulletproof windshield is plated on the inner side of a sapphire layer or on the inner side of an inorganic glass layer; the windshield type input module in the windshield heating control box is electrically connected to the heating cable of the transparent bulletproof windshield; the windshield heating control box is used to obtain the coating type of the transparent bulletproof windshield through the windshield type input module, and the processor selects a corresponding control circuit according to the coating type to perform heating control on the transparent bulletproof windshield. The heating control system adopting this structural form can realize control of different heating control rates for transparent bulletproof windshields of different configurations; it not only realizes the electric heating function of the transparent bulletproof windshield, but also realizes the use of one heating control box to perform heating control on two transparent bulletproof windshields of different configurations with different heating control rates, thereby achieving LRU-level replacement of the heating control system during field use, greatly reducing the field spare parts cost. Specific embodiment:

[0074] Reference Figure 1 The structure of the heating control system shown includes: a power input module, a windshield heating control box and a transparent bulletproof windshield glass. The power input module includes: a DC 28V power input unit and a three-phase AC 115V power input unit, and the windshield heating control box can be powered by the DC 28V power input unit.

[0075] In this embodiment, the three-phase AC 115V power input unit is connected to the electrically heated conductive film of the transparent bulletproof windshield through the windshield heating control box, so that the on and off state of the AC power input unit is controlled by the windshield heating control box. In a specific implementation, the DC 28V power input unit controls the relay switch on the three-phase AC line of the three-phase AC 115V power input unit through the processor MCU in the heating control box, thereby realizing the control of the heating function of the transparent bulletproof windshield.

[0076] In this embodiment, the windshield heating control box is internally provided with an electrically connected windshield type input module and a processor MCU, a temperature acquisition module, a power-on self-test module, and a judgment system for the heating cables of the two types of windshields.

[0077] The temperature acquisition module of the windshield heating control box is provided with heating temperature feedback, automatic heating control function and overheating protection function. The temperature acquisition module can collect the temperature of the transparent bulletproof windshield in real time and feed it back to the processor. When the temperature feedback from the temperature acquisition module is lower than the lower limit of the heating temperature threshold, heating starts, and when it is higher than the upper limit of the heating temperature threshold, heating stops. When the temperature feedback from the temperature acquisition module is higher than the over-limit temperature threshold, the heating control box gives a fault alarm signal, that is, prompts that the high temperature exceeds the limit, so as to stop the heating work.

[0078] The windshield heating control box is provided with a loop cable and a disconnect cable on two windshield heating cables with different heating control rates, wherein one windshield heating cable is provided with a loop cable, and the other windshield heating cable is provided with a disconnect cable. Before the transparent bulletproof windshield starts heating control, the loop cable or disconnect cable provided on the transparent bulletproof windshield is detected by the windshield type input module, and a 0 / 1 discrete quantity signal is formed and input to the processor MCU, wherein the loop cable is a signal 0, indicating a heating control rate of a windshield of one configuration, and the disconnect cable is a signal 1, indicating a heating control rate of a windshield of another configuration.

[0079] In this embodiment, two control circuits are provided in the processor MCU, and during heating, a correct heating control rate is selected according to a discrete quantity signal input from the windshield type input module.

[0080] In this embodiment, a power-on self-test module is provided inside the heating control box. The power-on self-test module can detect the circuit of the temperature acquisition module on the one hand, and the heating current on the other hand. If there is a fault, the heating function is stopped.

[0081] In this embodiment, an electric heating conductive film and a temperature sensor are arranged inside the transparent bulletproof windshield. One of the electric heating conductive films is plated on the outermost sapphire material, and the other is plated on the inner inorganic glass. The temperature sensor is arranged on the electric heating conductive film.

[0082] It should be noted that since the thermal conductivity of inorganic glass is much lower than that of sapphire material, when the electric heating film is plated on inorganic glass, its resistance value must be much lower than that plated on sapphire, in order to increase the heating power.

[0083] In this embodiment, three areas with equivalent resistance values ​​can be set on the electric heating conductive film, including three-phase heating resistors, which are connected in a triangle with a 115V three-phase AC power supply, which is beneficial to increasing the line voltage. Under the condition of constant power, the heating resistor can be increased and the thickness of the heating resistor can be reduced, thereby improving the transmittance.

[0084] In this embodiment, one type of temperature sensor is arranged on the sapphire electric heating film on the outermost side of the transparent bulletproof windshield glass laminate structure, and the other type is arranged on the inorganic glass electric heating film on the inner layer of the transparent bulletproof windshield glass laminate structure. In order to ensure the anti-icing temperature on the outermost side of the windshield, the temperature control points of the two structures are different. The temperature control point of the temperature sensor arranged on the inorganic glass needs to be higher than the temperature control point arranged on the sapphire.

[0085] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A heating control system for controlling windshields with different heating control rates, characterized in that: include: Power input module, windshield heating control box and transparent bulletproof windshield; Wherein, the power input module includes: a DC power input unit and an AC power input unit, which is used to supply power to the windshield heating control box through the DC power input unit; The AC power input unit is connected to the heating cable of the electric heating conductive film of the transparent bulletproof windshield through the windshield heating control box, so as to control the on and off state of the AC power input unit through the windshield heating control box; The transparent bulletproof windshield glass comprises: a plurality of material layers, an electrically heated conductive film and a temperature sensor plated on one of the material layers; wherein the plurality of material layers comprises a sapphire layer, an inorganic glass layer, an organic glass layer and a polycarbonate layer arranged in sequence from the outside to the inside, and the electrically heated conductive film is plated on the inside of the sapphire layer or on the inside of the inorganic glass layer; The windshield heating control box includes: an electrically connected windshield type input module and a processor, wherein the windshield type input module is electrically connected to a heating cable of the transparent bulletproof windshield glass; the windshield heating control box is used to obtain the coating type of the transparent bulletproof windshield glass through the windshield type input module, and the processor selects a corresponding control circuit according to the coating type to perform heating control on the transparent bulletproof windshield glass.

2. The heating control system for controlling windshields with different heating control rates according to claim 1, characterized in that: For the first configuration transparent bulletproof windshield glass having an electrically heated conductive film coated on a sapphire layer, and the second configuration transparent bulletproof windshield glass having an electrically heated conductive film coated on an inorganic glass layer, the anti-icing control temperature and the heating power are different.

3. The heating control system for controlling windshields with different heating control rates according to claim 2, characterized in that: The windshield heating control box further includes: a temperature acquisition module; The input end of the temperature acquisition and processing module is connected to the temperature sensor of the transparent bulletproof windshield, and the output end is connected to the processor; The windshield heating control box is also used to collect the temperature of the transparent bulletproof windshield glass in real time through the temperature collection module and feed it back to the processor. When the fed-back temperature is lower than the lower limit of the heating temperature threshold, heating is started, and when it is higher than the upper limit of the heating temperature threshold, heating is stopped. When the fed-back temperature is higher than the over-limit temperature threshold, a fault alarm signal is output through the processor to stop the heating work.

4. The heating control system for controlling windshields with different heating control rates according to claim 3, characterized in that: The windshield heating control box further includes: a power-on self-test module; The first input end of the power-on self-test module is connected to the path between the temperature acquisition module and the temperature sensor, the second input end is connected to the path between the AC power input unit and the electric heating conductive film, and the output end is connected to the path between the temperature acquisition module and the processor; The windshield heating control box is also used to detect the path formed between the temperature sensor and the temperature acquisition module in the transparent bulletproof windshield glass, and to detect the heating current of the path formed between the AC power input unit and the electric heating conductive film. When a path fault is detected, the heating function is stopped.

5. The heating control system for controlling windshields with different heating control rates according to claim 4, characterized in that: A loop cable is arranged on the heating cable of the transparent bulletproof windshield of the first configuration, and a disconnect cable is arranged on the heating cable of the transparent bulletproof windshield of the second configuration; or, A disconnect cable is provided on the heating cable of the transparent bulletproof windshield of the first configuration, and a loop cable is provided on the heating cable of the transparent bulletproof windshield of the second configuration; Among them, the loop cable or the disconnect cable is respectively connected to the electrically connected windshield type input module, one end of the loop cable or the disconnect cable is grounded through the electrically connected windshield type input module, and the other end is connected to the processor through the electrically connected windshield type input module.

6. The heating control system for controlling windshields with different heating control rates according to claim 5, characterized in that: The windshield heating control box obtains the coating type of the transparent bulletproof windshield glass through the windshield type input module in the following manner: Before the transparent bulletproof windshield starts to perform heating control, the loop cable or the broken cable set on the transparent bulletproof windshield is detected through the windshield type input module to form a 0 / 1 discrete signal input to the processor MCU. The loop cable is signal 0, indicating the heating control rate of a windshield of one configuration, and the broken cable is signal 1, indicating the heating control rate of another configuration of the windshield.

7. The heating control system for controlling windshields with different heating control rates according to claim 5, characterized in that: The processor includes two control circuits, which determine the configuration of the windshield according to the discrete quantity signal input from the windshield type input module, select the corresponding control circuit for heating control, and the anti-icing control temperature and heating power of different control circuits are different.

8. The heating control system for controlling windshields with different heating control rates according to claim 2, characterized in that: The resistance value of the electrically heated conductive film in the second-configuration transparent bullet-proof windshield is much lower than the resistance value of the electrically heated conductive film in the first-configuration transparent bullet-proof windshield.

9. The heating control system for controlling windshields with different heating control rates according to any one of claims 1 to 8, characterized in that: The AC power input unit adopts a three-phase AC 115V power input unit; The electric heating conductive film includes a three-phase heating resistor, which is connected to a three-phase AC 115V power input unit in a delta connection form. The three-phase cable of the AC power input unit in the power input module is divided into two cables at the output end of the internal relay of the windshield heating control box, forming a total of 6 cables; the 6 cables are connected to the three-phase heating resistor in a triangle connection, wherein a line voltage is formed between A1 and B1, a line voltage is formed between B2 and C2, and a line voltage is formed between C1 and A2.

10. The heating control system for controlling windshields with different heating control rates according to any one of claims 2 to 8, characterized in that: For the transparent bulletproof windshield glass of the first configuration in which the electric heating conductive film is plated on the sapphire layer, the temperature sensor is arranged on the electric heating conductive film on the outermost sapphire layer of the transparent bulletproof windshield glass; For the second configuration transparent bulletproof windshield glass having an electrically heated conductive film plated on an inorganic glass layer, the temperature sensor is arranged on the electrically heated conductive film of the inorganic glass layer of the inner layer of the transparent bulletproof windshield glass; The upper limit and lower limit of the heating temperature threshold in the second configuration transparent bullet-proof windshield are both higher than the upper limit and lower limit of the heating temperature threshold in the first configuration transparent bullet-proof windshield.

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