CN107818683B - Wireless control switch device and system - Google Patents
Wireless control switch device and system Download PDFInfo
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- CN107818683B CN107818683B CN201711218392.9A CN201711218392A CN107818683B CN 107818683 B CN107818683 B CN 107818683B CN 201711218392 A CN201711218392 A CN 201711218392A CN 107818683 B CN107818683 B CN 107818683B
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- switch
- piezoelectric
- wireless control
- control
- capacitor
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 2
- 239000011241 protective layer Substances 0.000 claims 2
- 238000003306 harvesting Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 12
- 238000005034 decoration Methods 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010926 waste battery Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/181—Circuits; Control arrangements or methods
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
Abstract
The invention discloses a wireless control switch device, which comprises a switch panel, a lithium battery, a signal transmitting module and further comprises: a piezoelectric energy supply device connected with the lithium battery; the piezoelectric energy supply device is used for generating deformation through control operation of the switch panel, so that electric energy is generated and stored in the lithium battery through the charging control module; the lithium battery is used for supplying power to the signal transmitting module. The wireless control switch device can provide a wireless long-term energy supply control switch for household appliances. The invention also discloses a wireless control switch system which has the beneficial effects.
Description
Technical Field
The invention relates to the field of energy collection engineering realization, in particular to a wireless control switch device and a system.
Background
When the household decoration is performed, the panel switch is used for controlling the opening and closing of various electric appliances. Under the existing condition, the household appliances and the panel switch are connected in a wired connection mode. Therefore, the wiring problem between the household appliance and the panel switch not only affects the aesthetic feeling of the overall design of the household, but also has the potential safety hazard of causing electric leakage due to the long-term embedded electric wire. Accordingly, a method of controlling a home appliance using a wireless switch has been proposed.
However, since existing wireless switches are typically battery powered, they cannot be powered for long periods of time. In addition, disposal of the waste batteries is itself a significant environmental problem.
From the above, it can be seen how to increase the power supply duration of the wireless control switch battery is a problem to be solved at present.
Disclosure of Invention
The invention aims to provide a wireless control switch device, which solves the problem that the power supply time of a wireless control switch battery is too short in the prior art; the invention also provides a wireless control switch device which has the beneficial effects.
In order to solve the technical problems, the invention provides a wireless control switch device, which comprises a switch panel, a lithium battery, a signal transmitting module and further comprises: a piezoelectric energy supply device connected with the lithium battery; the piezoelectric energy supply device is used for generating deformation through control operation of the switch panel, so that electric energy is generated and stored in the lithium battery through the charging control module; the lithium battery is used for supplying power to the signal transmitting module.
Wherein, the piezoelectric energy supply device is a piezoelectric device made of piezoelectric ceramics.
The charging control module is connected with the lithium battery through an electric energy collecting/converting unit so as to collect/convert electric energy generated by the piezoelectric energy supply device into required electric energy to be stored in the lithium battery.
The signal transmitting module comprises an infrared signal transmitting unit, and the infrared signal transmitting unit is used for converting a switching instruction sent by the switch panel into an infrared signal to be transmitted.
The wireless control switch device further comprises a movable switch box, and a user selectively fixes the wireless control switch device by using a repeatable fixing device on the movable switch box.
The switch panel further comprises an LED lamp so as to display the working state of the infrared signal transmitting circuit.
The piezoelectric power supply device is arranged on two sides of the switch panel and connected with the switch panel through a compression spring.
The switch panel comprises a key switch, a compression spring is arranged at the bottom of the key switch, and the other end of the compression spring is connected with the piezoelectric energy supply device.
The invention also provides a wireless control switch system, which comprises a wireless control switch device, a signal receiving control device and a silicon controlled rectifier control device;
the signal receiving control device is used for receiving a switching signal transmitted by the signal transmitting device of the wireless control switching device and transmitting a driving signal to the silicon controlled rectifier control device according to the switching signal; the controllable silicon control device is used for receiving the driving signal sent by the signal receiving device so as to control the switch of the user electrical appliance.
The signal receiving unit comprises an infrared signal sensing unit, a control unit and an infrared signal receiving unit;
the infrared signal sensing unit is used for sensing the switching signal received by the infrared signal receiving unit and sending a control signal to the control unit according to the sensing result, so that the control unit can control whether the infrared signal receiving unit sends a driving signal to the silicon controlled rectifier control device or not.
The invention provides a wireless control switch device, comprising: the lithium battery signal transmission device comprises a switch panel, a lithium battery and a piezoelectric energy supply device connected with the lithium battery. When a user performs control operation through the switch panel, the piezoelectric energy supply device is deformed; the piezoelectric energy supply device converts the pressure deformation into electric energy and stores the generated electric energy into the lithium battery; the lithium battery supplies power to the signal transmitting device so that the signal transmitting device transmits control signals to the user electrical appliance. Therefore, the wireless switching device solves the problems of inconvenience and potential safety hazards caused by wired connection of the electric appliance and the panel switch in the prior art, and simultaneously collects and converts energy generated when a user performs control operation on the electric appliance through the switch panel by the piezoelectric power supply device, namely pressure deformation is converted into electric energy required by the lithium battery, so that the problem of short power supply duration of the wireless control switch battery in the prior art is solved.
Drawings
For a clearer description of embodiments of the invention or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a wireless control switch device according to an embodiment of the present invention;
FIG. 2 is a block diagram of a switch panel;
FIG. 3 is a schematic diagram of a piezoelectric power supply;
FIG. 4 is a flow chart of a charge control module;
FIG. 5 is a schematic circuit diagram of a charge control module;
fig. 6 is a schematic diagram of another wireless control switch device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a wireless control switch device according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a wireless control switch device which can increase the time length of battery power supply; the invention also provides a wireless control switch system which has the beneficial effects and is not repeated here.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
When the household decoration is carried out, most household appliances are connected with the panel switch in a wired connection mode. But the wiring between the household appliance and the panel switch not only affects the aesthetic feeling of the overall design of the decoration, but also has potential safety hazards such as electric leakage and the like caused by the wire embedded for a long time. Based on the above problems, a wireless switch for wirelessly controlling the operation and closing of an electric appliance is proposed, and the existing wireless switch is generally powered by a battery and cannot be powered for a long time.
The piezoelectric effect refers to the phenomenon that when some dielectrics are deformed by external force in a certain direction, polarization is generated inside the dielectrics, and opposite charges are generated on two opposite surfaces of the dielectrics. The piezoelectric device is a device made of piezoelectric effect of materials, and the piezoelectric device converts energy collected based on the piezoelectric effect and stores the converted energy in a lithium battery, so that the design of a wireless long-term energy supply control switch is provided.
Referring to fig. 1, fig. 1 is a schematic diagram of a wireless control switch device according to an embodiment of the invention.
In this embodiment, the wireless control switch device 1 may include a switch panel 10, a panel bearing 11, a charging control module 12, a lithium battery connection wire 13, a first compression spring 14, a second compression spring 15, a piezoelectric power supply device 16, and a lithium battery 17.
Referring to fig. 1 and 2, fig. 2 is a structural diagram of a switch panel; the switch panel 100 may include a first panel 101 and a second panel 102; the switch panel may have a square shape. The panel bearing 11 is installed at the middle position of the bottom of the switch panel. The bottom surfaces of the first layout 101 and the second layout 102 are respectively connected with a first compression spring 14 and a second compression spring 15, the bottoms of the first compression spring 14 and the second compression spring 15 are connected with the piezoelectric energy supply device 16, and when the first layout 101 or the second layout 102 is pressed down, the first compression spring 14 or the second compression spring 15 is pressed, so that the piezoelectric energy supply device 16 is deformed under pressure, and electric energy is generated.
To protect the piezoelectric power supply 16, a buffer plastic plate 18 may be mounted on the connection surface of the piezoelectric power supply 16 with the first compression spring 14 and the second compression spring 15.
Referring to fig. 1 and 3, fig. 3 is a schematic structural diagram of a piezoelectric power supply device. The piezoelectric energizing means 16 may be a square sheet, mounted in a position parallel to the switch panel 10. The piezoelectric power supply apparatus may include an upper rubber protection layer 161, a piezoelectric ceramic block 162, a metal positive electrode 163 and a metal negative electrode 164 connected to the piezoelectric ceramic block 162, and a lower rubber protection layer 165.
It should be noted that, the piezoelectric energy supply device may be in a thin plate shape or may be in a shape, and in this embodiment, the piezoelectric energy supply device is preferably configured in a thin plate shape, so that the volume of the wireless control switch may be reduced, the installation is more convenient, and the cost is reduced.
It should be noted that, the piezoelectric ceramic block 162 may also be a piezoelectric crystal block, and a piezoelectric device made of a ceramic material is preferred in this embodiment, because the control electric signal is generated by a pressing action of a finger of a user by using a high-efficiency piezoelectric ceramic material, so that the wireless control switch device 10 has a simple structure, a small size, a greatly reduced manufacturing cost, and a convenient use.
The metal positive electrode 163 and the metal negative electrode 164 may be selectively mounted on any position on the outer ring of the piezoelectric ceramic block 162, but for the sake of simple overall mounting structure of the wireless control switch device 10, the metal positive electrode 163 and the metal negative electrode 164 are mounted on the same short side length position of the piezoelectric ceramic block 162.
After receiving the pressure deformation, the piezoelectric energy supply device 16 collects/converts the electric energy generated by the piezoelectric energy supply device 16 into the required electric energy through the charging control module 12, and stores the required electric energy into the lithium battery 17. The signal transmitting module 20 includes an infrared signal transmitting circuit for converting the switching instruction sent by the switch panel 10 into an infrared signal for transmission.
Referring to fig. 4 and 5, fig. 4 is a flowchart of a charging control module, and fig. 5 is a schematic circuit diagram of the charging control module; the metal positive electrode 163 and the resistor R of the piezoelectric energy supply device 16 1 Is connected with the first end of the resistor R 1 Second terminal of (2) and resistor R 2 First end, capacitor C 1 The first end is connected with the resistor R 2 And a resistor R 3 Is a first terminal of (C) a capacitor 2 A first terminal of an operational amplifier OPA2277UA, a first pin of a capacitor C 3 Is connected to the first end of the capacitor C 1 A second terminal of (C) and a capacitor C 3 A second terminal of the operational amplifier OPA2277UA is connected with the resistor R 3 A second terminal of (C) a capacitor 2 A second end of the energy collection chip LTC3105EMS is connected with a first pin of the capacitor C 3 And capacitor C 4 A first end of the capacitor C is connected with a fourth pin of the energy collection chip LTC3105EMS 4 Is connected with a third pin of the energy collecting chip LTC3105EMS, and a sixth pin of the energy collecting chip LTC3105EMS is connected with the inductor L 1 Is connected with the first end of the inductor L 1 A second terminal of (C) and a capacitor C 5 Is a first end of a power supply S 1 Positive electrode connection of capacitor C 5 The second end of the power supply S is connected with the seventh pin of the energy collection chip LTC3105EMS and the ground wire, and the eighth pin of the energy collection chip LTC3105EMS is connected with the power supply S 1 Is connected with the negative pole and the ground wire, and is provided with a power supply S 1 The anode and the cathode of the infrared signal transmitting circuit are connected with the infrared signal transmitting circuit.
An LED display lamp may be further provided on the switch panel 10 of the present embodiment so as to display the operation state of the infrared signal transmitting circuit.
In this embodiment, the switch box of the wireless control switch device may be constructed in the form of a wall switch box and fixed to a desired position of an indoor wall; and can also be configured as a movable switch and can be selectively secured to a desired location on the indoor presentation. The fixing surface of the movable switch box can be provided with a repeatable fixing device, and the repeatable fixing device is preferably a repeatable adhesive rubber or a magnet.
In this embodiment, the user transmits a switching signal using a switching panel of the wireless control switching device; the piezoelectric energy supply device generates electric energy by utilizing deformation generated by key operation of a user, and the electric energy is collected/converted into electric energy required by a lithium battery through a charging control circuit; the lithium battery supplies power for the infrared signal transmitting circuit, and the infrared signal transmitting circuit converts a switching signal of the switch panel into an infrared signal to be transmitted. The wireless control switch provided by the embodiment can collect energy generated by key operation of a user and convert the energy into electric energy required by the lithium battery, so that long-time energy supply of the wireless control switch is realized.
Referring to fig. 6, fig. 6 is a schematic diagram of another wireless control switch device according to an embodiment of the invention. In another embodiment of the present invention, the switch panel of the wireless control switch device may be provided as a slide switch member 20.
In the present embodiment, the piezoelectric power supply device 21 and the piezoelectric power supply device 22 are included, and the two piezoelectric power supply devices are respectively mounted on both sides of the slide switch member 20 and are respectively connected with the slide switch member 20 through the compression spring 23 and the compression spring 24. When the user moves the sliding switch piece 20 left and right, the piezoelectric power supply devices positioned at both sides of the sliding switch piece 20 are pressed to generate deformation, thereby generating electric power. The piezoelectric power supply device is connected to the lithium battery 25 through a charge control wire 26. The connection relationship between other components in this embodiment may refer to the previous embodiment, and will not be described herein.
Referring to fig. 7, fig. 7 is a schematic diagram of a wireless control switch device according to an embodiment of the invention.
The wireless control switch system provided by the embodiment comprises the wireless control switch device, the signal receiving control device and the silicon controlled rectifier control device provided by the embodiment;
the signal receiving control device is used for receiving a switching signal transmitted by the signal transmitting device of the wireless control switching device and transmitting a driving signal to the silicon controlled rectifier control device according to the switching signal; the controllable silicon control device is used for receiving the driving signal sent by the signal receiving device so as to control the switch of the user electrical appliance. The main loop switch control unit of the user electrical appliance opens or closes the circuit of the corresponding user electrical appliance in response to the switching signal transmitted by the wireless control switch.
The switch of the wireless control switch system provided by the embodiment can realize the wireless control switch operation of the user electric appliance, and the switch can automatically perform long-time energy supply operation, so that the problems of unattractive appearance and potential safety hazard caused by wired connection between a panel switch and the household electric appliance in the existing home decoration are solved.
The wireless control switch device and the wireless control switch control system provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (8)
1. The utility model provides a wireless control switching device, includes switch panel, lithium cell, signal transmission module, its characterized in that still includes: the piezoelectric energy supply device is connected with the lithium battery, and the charging control module is used for controlling the charging of the lithium battery;
the piezoelectric energy supply device is used for generating deformation through control operation of the switch panel, so that electric energy is generated and stored in the lithium battery through the charging control module; the lithium battery is used for supplying power to the signal transmitting module; the piezoelectric energy supply device is a thin plate-shaped piezoelectric device made of piezoelectric ceramics, and the piezoelectric energy supply device comprises: an upper rubber protective layer, a lower rubber protective layer, a metal positive electrode and a metal negative electrode; the metal positive electrode and the metal negative electrode are arranged on the same side of the piezoelectric energy supply device, the upper rubber protection layer is arranged on the upper surface of the piezoelectric energy supply device, and the lower rubber protection layer is arranged on the lower surface of the piezoelectric energy supply device;
the charging control module is connected with the lithium battery through an electric energy collecting/converting unit so as to collect/convert electric energy generated by the piezoelectric energy supply device into required electric energy to be stored in the lithium battery;
the charge control module includes: resistor R 1 Resistance R 2 Resistance R 3 Capacitance C 1 Capacitance C 2 Capacitance C 3 Capacitance C 4 Capacitance C 5 Operational amplifier, inductance L 1 Energy harvesting chip, power supply S 1 ；
The resistor R 1 Is connected to the piezoelectric energizing means, the resistor R 1 And the resistor R 2 Is connected with the first end of the capacitor C 1 The first ends are all connected with the resistor R 2 And the resistor R 3 Is connected with the first end of the capacitor C 2 A first terminal of the operational amplifier, a first pin of the operational amplifier, and the capacitor C 3 Is connected to the first end of the capacitor C 1 And said capacitor C 3 The second end of the operational amplifier is connected with the piezoelectric energy supply device, and the second pin of the operational amplifier is connected with the resistor R 3 The second end of the capacitor C 2 The second end of the energy collecting chip and the first pin of the energy collecting chip are connected, and the capacitor C 3 And the capacitor C 4 A fourth pin connected to the energy collecting chip, and a capacitor C 4 Is connected with the third pin of the energy collecting chip, and the sixth pin of the energy collecting chip is connected with the inductor L 1 Is connected with the first end of the inductor L 1 And the capacitor C 5 Is connected with the first end of the power supply S 1 The positive electrodes of the capacitor C are all connected 5 The second end of the energy collection chip is connected with the seventh pin of the energy collection chip and then grounded, and the eighth pin of the energy collection chip is connected with the power supply S 1 Is grounded after being connected to the negative electrode of the battery.
2. The wireless control switching device according to claim 1, wherein the signal transmitting module includes an infrared signal transmitting unit for converting a switching instruction issued by the switching panel into an infrared signal for transmission.
3. The wireless control switch device of claim 1, further comprising a removable switch box, wherein a user selectively secures the wireless control switch device using a repeatable fixture on the removable switch box.
4. The wireless control switch device of claim 1, wherein the switch panel further comprises an LED light to display the operating state of the infrared signal transmitting circuit.
5. The wireless control switch device of any one of claims 1 to 4, wherein the piezoelectric power supply device is installed at both sides of the switch panel and connected to the switch panel by a compression spring.
6. The wireless control switch device of any one of claims 1 to 4, wherein the switch panel comprises a push-button switch, a compression spring is mounted at the bottom of the push-button switch, and the other end of the compression spring is connected with the piezoelectric power supply device.
7. A wireless control switch system, characterized by comprising the wireless control switch device, signal reception control device, and thyristor control device according to any one of claims 1 to 6;
the signal receiving control device is used for receiving a switching signal transmitted by the signal transmitting device of the wireless control switching device and transmitting a driving signal to the silicon controlled rectifier control device according to the switching signal;
the controllable silicon control device is used for receiving the driving signal sent by the signal receiving device so as to control the switch of the user electrical appliance.
8. The wireless control switch system of claim 7, wherein said signal receiving unit comprises an infrared signal sensing unit, a control unit, and an infrared signal receiving unit;
the infrared signal sensing unit is used for sensing the switching signal received by the infrared signal receiving unit and sending a control signal to the control unit according to the sensing result, so that the control unit can control whether the infrared signal receiving unit sends a driving signal to the silicon controlled rectifier control device or not.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711218392.9A CN107818683B (en) | 2017-11-28 | 2017-11-28 | Wireless control switch device and system |
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|---|---|---|---|
| CN201711218392.9A CN107818683B (en) | 2017-11-28 | 2017-11-28 | Wireless control switch device and system |
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| CN107818683A CN107818683A (en) | 2018-03-20 |
| CN107818683B true CN107818683B (en) | 2024-03-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111436722A (en) * | 2020-05-15 | 2020-07-24 | 安徽师范大学 | Bracelet with remote communication and automatic energy supplement functions |
| CN111901941B (en) * | 2020-06-30 | 2023-02-28 | 中铁第一勘察设计院集团有限公司 | Signal generation method of passive self-generating lighting control switch |
| CN111918465B (en) * | 2020-06-30 | 2022-12-16 | 中铁第一勘察设计院集团有限公司 | Passive self-generating lighting control switch and circuit thereof |
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