CN114710008B - Explosion-proof subassembly and head-mounted display device based on power split - Google Patents
Explosion-proof subassembly and head-mounted display device based on power split Download PDFInfo
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- CN114710008B CN114710008B CN202210627051.1A CN202210627051A CN114710008B CN 114710008 B CN114710008 B CN 114710008B CN 202210627051 A CN202210627051 A CN 202210627051A CN 114710008 B CN114710008 B CN 114710008B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
Abstract
The embodiment of the disclosure discloses an explosion-proof assembly based on power splitting and a head-mounted display device. The specific implementation mode of the explosion-proof assembly based on power splitting comprises a circuit board, wherein a power module and at least one splitting power module are arranged on the circuit board, each splitting power module in the at least one splitting power module is connected with the power module, and the power corresponding to each splitting power module in the at least one splitting power module is smaller than the target power. Each split power module in the at least one split power module comprises a power device, a switch device and at least one power detection device, wherein the switch device is configured to cut off the connection between the split power module and the power module in response to the detection that the power corresponding to the power device is greater than or equal to a preset power threshold value by any one power detection device. The explosion-proof assembly based on power splitting can prevent equipment from igniting combustible gas and prevent the equipment from exploding.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of circuit explosion prevention, in particular to an explosion-proof assembly based on power splitting and a head-mounted display device.
Background
The head-mounted display equipment comprises AR equipment such as AR glasses and the like which can be worn on the head, and an optical display system of the AR equipment generally comprises a micro display screen and an optical element, so that preset display content can be displayed in a real environment in a superposed mode through an optical path design on the basis that the real environment is not shielded, and interactive feedback can be performed; therefore, the industrial productivity can be improved, the method is widely applied to the fields of security inspection, petrochemical industry, energy, building traffic and the like, the operation efficiency and safety are obviously improved by overlapping displayed contents and a brand new operation mode, the hands of a user are liberated, and the limitation of distance and position is eliminated.
Due to the special working environment of the energy source, the electric power, the petrochemical industry and other scenes, explosive gas or combustible particulate matters can be contacted in the use environment, so that the safety of the equipment is considered to be safer and more rigorous, and the explosion-proof performance of the equipment used in the environment is regulated to be stricter. According to the explosion-proof standard, under normal operation and prescribed fault conditions, any spark or any thermal effect generated by circuitry in a device (e.g., a head-mounted display device) cannot ignite a prescribed explosive gas environment. Conventional head-mounted display equipment is mostly high-power equipment due to complex structure and more electronic components.
However, when the above-described high-power device is used, there are often technical problems as follows:
the high power equipment corresponds to high power, and the temperature of the surface contacting with air is easily caused to exceed the allowed maximum value, so that the temperature reaches the ignition point of combustible gas, and the equipment ignites the combustible gas and even explodes.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Some embodiments of the present disclosure propose explosion-proof assemblies and head-mounted display devices based on power splitting to address one or more of the technical problems mentioned in the background section above.
In a first aspect, some embodiments of the present disclosure provide an explosion-proof assembly based on power splitting, where the explosion-proof assembly based on power splitting includes a circuit board, the circuit board is provided with a power module and at least one split power module, each split power module in the at least one split power module is connected to the power module, and a power corresponding to each split power module in the at least one split power module is smaller than a target power; each split power module of the at least one split power module includes a power device, a switching device, and at least one power detection device, where the switching device is configured to disconnect the split power module from the power supply module in response to any one of the power detection devices detecting that power corresponding to the power device is greater than or equal to a preset power threshold.
Optionally, the circuit board is further provided with at least one diode unit, each diode unit in the at least one diode unit is connected between the power module and the corresponding split power module, and the diode units in the at least one diode unit are connected with the split power modules in the at least one split power module in a one-to-one correspondence manner.
Optionally, a buck-boost converter is further disposed on the circuit board, and each split power module is connected to the power module through the buck-boost converter.
Optionally, the circuit board is provided with at least two split power modules, and each split power module of the at least two split power modules is connected in parallel.
Optionally, at least one isolated communication component is further disposed on the circuit board, and any one isolated communication component in the at least one isolated communication component is connected to the two split power modules to isolate communications between all the split power modules.
Optionally, each of the at least one isolated communication component comprises a resistor and a capacitor, the resistor and the capacitor being connected in parallel.
Optionally, the at least one split power module includes a split power module corresponding to the main chip.
Optionally, the at least one split power module includes a split power module corresponding to the wireless communication chip.
In a second aspect, some embodiments of the present disclosure provide a head-mounted display device including: as above-mentioned first aspect's explosion-proof subassembly and head-mounted display device body based on power split, above-mentioned explosion-proof subassembly sets up the inside at above-mentioned head-mounted display device body, and above-mentioned head-mounted display device body includes display module assembly.
Optionally, the head-mounted display device body further includes a power interface, and the power interface is electrically connected to the power module.
The above embodiments of the present disclosure have the following beneficial effects: through the explosion-proof assembly based on power splitting of some embodiments of this disclosure, equipment can be avoided lighting combustible gas and equipment explosion. In particular, the reasons for the ignition of combustible gases and even the explosion of the equipment are: the high power devices are relatively powerful and tend to cause the surface temperature in contact with air to exceed the maximum allowable value, so that the temperature reaches the ignition point of the combustible gas. Based on this, the explosion-proof component based on power split of some embodiments of the present disclosure includes a circuit board, on which a power module and at least one split power module are disposed, and each split power module in the at least one split power module is connected to the power module, where power corresponding to each split power module in the at least one split power module is smaller than a target power. Each split power module of the at least one split power module includes a power device, a switching device, and at least one power detection device, where the switching device is configured to disconnect the split power module from the power supply module in response to any one of the power detection devices detecting that power corresponding to the power device is greater than or equal to a preset power threshold. Because the power corresponding to each split power module is less than the target power, it is possible to avoid the surface temperature in contact with air from exceeding the maximum allowed value. And the switch device is configured to disconnect the split power module from the power module in response to any one of the power detection devices detecting that the power corresponding to the power device is greater than or equal to a preset power threshold. And further the temperature can be prevented from reaching the ignition point of the combustible gas. Therefore, the explosion-proof assembly based on power splitting can prevent the equipment from igniting combustible gas and prevent the equipment from exploding.
Drawings
The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It should be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of some embodiments of a power split based explosion proof assembly according to the present disclosure;
FIG. 2 is a schematic structural diagram of further embodiments of a power split based explosion proof assembly according to the present disclosure;
fig. 3 is a schematic structural diagram of some embodiments of a head mounted display device according to the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.
In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
It should be further noted that, for the convenience of description, only the portions relevant to the related disclosure are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a" or "an" in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will appreciate that references to "one or more" are intended to be exemplary and not limiting unless the context clearly indicates otherwise.
The names of messages or information exchanged between devices in the embodiments of the present disclosure are for illustrative purposes only, and are not intended to limit the scope of the messages or information.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a schematic structural diagram of some embodiments of a power split based explosion proof assembly according to the present disclosure. Fig. 1 includes a power module 1 and a split power module 2. The split power module 2 includes a power device 21, a switching device 22, and a power detection device 23.
In some embodiments, the explosion-proof assembly based on power splitting includes a circuit board, on which a power module 1 and at least one split power module (for example, a split power module 2) are disposed, where each split power module of the at least one split power module is connected to the power module 1, and a power corresponding to each split power module of the at least one split power module is smaller than a target power. The at least one split power module may be a small power module split from a larger power module. As an example, the at least one split power module may include, but is not limited to, at least one of: microphone module, speaker module, display module, sensor module and camera module. The power of the small power module may be less than the target power. The target power can be set according to the explosion-proof requirement of a specific standard. As an example, when the power demand of the explosion-proof requirement specifying module is less than 4W, the above-mentioned target power may be less than or equal to 4W.
In some embodiments, each split power module (e.g., split power module 2) of the at least one split power module includes a power device (e.g., power device 21), a switching device (e.g., switching device 22), and at least one power detection device (e.g., power detection device 23), where the switching device is configured to disconnect the split power module from the power module 1 in response to any one of the power detection devices detecting that the power corresponding to the power device is greater than or equal to a preset power threshold. The power device may be an electronic component capable of outputting power. For example, the power device may be a resistor, an inductor, a diode, a transistor, or the like. The power detection device may be a device for detecting an output power of the power device. As an example, the power detection device may be an integrated circuit. For example, the power detection device may be LTC 6101. When each split power device includes at least two power detection devices, every two adjacent power detection devices of the at least two power devices are connected in series. The switching device may be a device for disconnecting the split power module from the power module 1. For example, the switching device may be a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor).
Optionally, the at least one split power module includes a split power module corresponding to the main chip. The main chip may be a microchip for controlling the respective modules in the circuit board. For example, the main Chip may be an SoC (System on Chip). The main chip may also be an MCU (micro controller Unit).
Optionally, the at least one split power module includes a split power module corresponding to the wireless communication chip. The wireless communication chip may be a microchip for wireless communication with other devices. For example, the wireless communication chip may include, but is not limited to, at least one of: 5G chip, 4G chip, wifi chip.
The above embodiments of the present disclosure have the following advantages: through the explosion-proof assembly based on power splitting of some embodiments of the present disclosure, the ignition of combustible gas by equipment and the explosion of equipment can be avoided. In particular, the reasons for the ignition of combustible gases and even the explosion of the equipment are: the high power devices correspond to a high power which tends to cause the temperature of the surface in contact with the air to exceed the maximum value allowed, so that the temperature reaches the ignition point of the combustible gas. Based on this, the explosion-proof subassembly based on power split of some embodiments of this disclosure includes the circuit board, is provided with power module and at least one split power module on the above-mentioned circuit board, and every split power module in above-mentioned at least one split power module all is connected with above-mentioned power module, and wherein, the power that every split power module in above-mentioned at least one split power module corresponds is less than the target power. Each split power module in the at least one split power module includes a power device, a switching device, and at least one power detection device, where the switching device is configured to disconnect the split power module from the power module in response to any one of the power detection devices detecting that power corresponding to the power device is greater than or equal to a preset power threshold. Because the power corresponding to each split power module is less than the target power, it is possible to avoid the surface temperature in contact with air from exceeding the maximum allowed value. And the switch device is configured to disconnect the split power module from the power module in response to any one of the power detection devices detecting that the power corresponding to the power device is greater than or equal to a preset power threshold. Thereby further preventing the temperature from reaching the ignition point of the combustible gas. Therefore, the explosion-proof assembly based on power splitting can prevent the equipment from igniting combustible gas and prevent the equipment from exploding.
Fig. 2 is a schematic structural diagram of further embodiments of a power split based explosion proof assembly according to the present disclosure. Fig. 2 includes a power module 1, a split power module 2, a split power module 3, a diode unit 4, a diode unit 5, a buck-boost converter 6, and an isolated communication component 7.
In some embodiments, at least one diode unit (e.g., diode unit 4 and diode unit 5) may be further disposed on the circuit board. Each of the at least one diode unit may be connected between the power module 1 and a corresponding split power module. The diode units in the at least one diode unit may be connected to the split power modules in the at least one split power module in a one-to-one correspondence manner. It will be appreciated that each split power module may be connected in series with the power supply module 1 described above by means of a diode unit. The diode unit may include at least one diode. Here, the number of diodes may be set according to different security levels. The diodes included in the diode unit may be connected in series. One diode of each diode unit, which is close to the power module 1, is in forward conduction connection with the power module 1. As an example, the diode may be an ideal diode, and the ideal diode may include a diode chip and a MOS transistor.
In some embodiments, a buck-boost converter 6 may be further disposed on the circuit board. Each split power module can be connected to the power module 1 via the buck-boost converter 6. The buck-boost converter 6 may be a circuit whose output voltage may be lower or higher than the input voltage. For example, the step-up/step-down converter 6 may be a step-down/step-up converter.
In some embodiments, at least two split power modules (e.g., split power module 2 and split power module 3) may be disposed on the circuit board. Each of the at least two split power modules may be connected in parallel.
In some embodiments, at least one isolated communication component (e.g., isolated communication component 7) may also be disposed on the circuit board. Any of the at least one isolated communication assembly may be connected to both split power modules to isolate communications between all of the split power modules. Specifically, the two split power modules may be two split power modules that need to communicate through the isolation communication component isolation circuit in the at least one split power module. The isolated communication component described above may be a component for isolating communications between split power modules. For example, the isolated communication component may include a resistor or a capacitor.
Optionally, each of the at least one isolated communication component may include a resistor and a capacitor. The resistor and the capacitor may be connected in parallel. The resistor is used for transmitting common signals, and the capacitor is used for transmitting high-speed signals. The resistance value of the resistor may be set to 10-1000 ohms. The capacitor may be an N-fold capacitor connected in series. N is an integer of 1 or more. For example, N may be 2. The series connected N capacitors may be 2 capacitors in series. The capacitance of the capacitor may be 10pF or more and 10uF or less.
As can be seen from fig. 2, compared with the description of some embodiments corresponding to fig. 1, the explosion-proof assembly based on power splitting in some embodiments corresponding to fig. 2 further includes a diode unit, a buck-boost converter and an isolation communication assembly. Therefore, the diode unit can realize forward conduction connection and reverse cut-off with the power supply module. The buck-boost converter can realize that the output voltage can be lower than or higher than the input voltage. The circuit communication of different split power modules can be classified and isolated through the isolation communication assembly, so that common signals can be transmitted through the resistor, and high-speed signals can be transmitted through the capacitor.
Fig. 3 illustrates a structural schematic diagram of some embodiments of a head mounted display device according to the present disclosure. Fig. 3 includes a power split based explosion proof assembly 8 and a head mounted display device body 9. Wherein, the head-mounted display device body 9 includes a display module 91.
In some embodiments, the head mounted display device comprises: as the power splitting based explosion-proof assembly 8 and the head-mounted display device body 9 described in the embodiments corresponding to fig. 1 or fig. 2, the power splitting based explosion-proof assembly 8 may be disposed inside the head-mounted display device body 9. The head-mounted display apparatus body 9 may include a display module 91. It is to be understood that the head-mounted display apparatus body 9 may be a head-mounted display. For example, the head-mounted display device body may be AR (Augmented Reality) glasses. The head-mounted display device body may also be MR (media Reality) glasses. The head-mounted display device body can also be an MR head ring. The display module 91 may be an optical display system for supporting display. The optical display system may be composed of a micro display screen and an optical element. The optical element includes, but is not limited to, at least one of the following: prism, free-form surface, coaxial air guide, optical waveguide.
Optionally, the head-mounted display device body 9 may further include a power interface, and the power interface may be electrically connected to the power module. The power supply interface may be an interface for connecting an external power supply. The external power supply can be a charger or a charger connected with a power supply. Therefore, the head-mounted display equipment can be supplied with power for a long time by connecting the power interface with an external power supply.
The above embodiments of the present disclosure have the following beneficial effects: with the head-mounted display device of some embodiments of the present disclosure, it is possible to prevent the device from igniting combustible gas and to prevent the device from exploding. In particular, the reasons for the ignition of combustible gases and even the explosion of the equipment are: the high power devices correspond to a high power which tends to cause the temperature of the surface in contact with the air to exceed the maximum value allowed, so that the temperature reaches the ignition point of the combustible gas. Based on this, the head mounted display device of some embodiments of the present disclosure includes: the explosion-proof assembly based on power splitting and the head-mounted display device body are as described in the embodiments corresponding to fig. 1 or fig. 2, and the explosion-proof assembly based on power splitting can be arranged inside the head-mounted display device body. The head-mounted display device body can comprise a display module. Because the power corresponding to each split power module in the explosion-proof assembly based on power splitting is smaller than the target power, the surface temperature in contact with air can be prevented from exceeding the allowable maximum value. And then adopt this explosion-proof subassembly's based on power split head-mounted display equipment can avoid equipment to ignite combustible gas to and avoid equipment to explode.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure in the embodiments of the present disclosure is not limited to the particular combination of the above-described features, but also encompasses other embodiments in which any combination of the above-described features or their equivalents is possible without departing from the scope of the present disclosure. For example, the above features and (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.
Claims (7)
1. An explosion-proof assembly based on power splitting, comprising: a circuit board;
the circuit board is provided with a power supply module and at least two split power modules, the at least two split power modules comprise split power modules with different functions, each split power module of the at least two split power modules is connected in parallel, each split power module of the at least two split power modules is connected with the power supply module, and the power corresponding to each split power module of the at least two split power modules is smaller than a target power;
each split power module of the at least two split power modules comprises a power device, a switch device and at least one power detection device, the power device is an electronic component capable of outputting power, each power detection device of the at least one power detection device is a device for detecting the output power of the power device, and the switch device is configured to cut off the connection between the split power module and the power module in response to any power detection device detecting that the power corresponding to the power device is greater than or equal to a preset power threshold;
the circuit board is further provided with at least one isolation communication assembly, any one isolation communication assembly in the at least one isolation communication assembly is connected with the two split power modules so as to isolate communication between all the split power modules, each isolation communication assembly in the at least one isolation communication assembly comprises a resistor and a capacitor, the resistor is connected with the capacitor in parallel, the resistor is used for transmitting common signals, and the capacitor is used for transmitting high-speed signals.
2. The explosion-proof assembly based on power splitting of claim 1, wherein at least one diode unit is further disposed on the circuit board, each diode unit of the at least one diode unit is connected between the power module and a corresponding split power module, and the diode unit of the at least one diode unit is connected with the split power module of the at least two split power modules in a one-to-one correspondence.
3. The power split based explosion-proof assembly of claim 1, wherein a buck-boost converter is further disposed on the circuit board, each split power module being connected to the power module through the buck-boost converter.
4. The power split based explosion-proof assembly of any one of claims 1 to 3, wherein the at least two split power modules comprise split power modules of a corresponding primary chip.
5. The power split based explosion-proof assembly of any one of claims 1 to 3, wherein the at least two split power modules comprise split power modules of a corresponding wireless communication chip.
6. A head-mounted display apparatus, wherein the head-mounted display apparatus comprises the power split based explosion-proof assembly according to any one of claims 1 to 5 and a head-mounted display apparatus body, the explosion-proof assembly being disposed inside the head-mounted display apparatus body, and the head-mounted display apparatus body comprising a display module.
7. The head mounted display device of claim 6, wherein the head mounted display device body further comprises a power interface electrically connected with the power module.
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| CN208271500U (en) * | 2018-06-08 | 2018-12-21 | 深圳市拓控科技有限公司 | A kind of anti-explosion display |
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| EP1811639A1 (en) * | 2006-01-23 | 2007-07-25 | Thomson Licensing S.A. | Overpower-protection circuit and power supply apparatus having the same |
| US7719809B2 (en) * | 2006-09-12 | 2010-05-18 | Hewlett-Packard Development Company, L.P. | Method and apparatus for distributing electrical power |
| CN101917125B (en) * | 2010-07-07 | 2012-12-05 | 山西科达自控工程技术有限公司 | Detachable underground high-voltage explosion-proof frequency converter |
| KR101350608B1 (en) * | 2011-12-22 | 2014-01-13 | 삼성전기주식회사 | Power module and multi power supplying apparatus having thereof |
| DE102016106798A1 (en) * | 2016-04-13 | 2017-10-19 | R. Stahl Schaltgeräte GmbH | Module for providing an intrinsically safe electrical output cable and explosion-proof luminaire |
| DE102016222173A1 (en) * | 2016-11-11 | 2018-05-17 | Leoni Bordnetz-Systeme Gmbh | Power distributor and electrical system with several power distributors |
| CN106711991A (en) * | 2016-12-23 | 2017-05-24 | 长园深瑞继保自动化有限公司 | Power supply module and distribution method for distributing power freely |
| CN108347166B (en) * | 2017-01-24 | 2019-11-05 | 台达电子企业管理（上海）有限公司 | Power module train |
| CN113030915B (en) * | 2021-03-02 | 2024-03-15 | 中煤科工集团重庆研究院有限公司 | Multi-interface intrinsic safety explosion-proof laser radar sensor |
| CN113030988B (en) * | 2021-03-02 | 2024-03-15 | 中煤科工集团重庆研究院有限公司 | Single-interface intrinsic safety explosion-proof laser radar sensor |
| CN113725820A (en) * | 2021-05-31 | 2021-11-30 | 杰华特微电子股份有限公司 | Over-power protection method and protection circuit of flyback converter and flyback converter |
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| CN208271500U (en) * | 2018-06-08 | 2018-12-21 | 深圳市拓控科技有限公司 | A kind of anti-explosion display |
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