CN113489498B - Automatic switching system of high-voltage antenna - Google Patents
Automatic switching system of high-voltage antenna Download PDFInfo
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- CN113489498B CN113489498B CN202110824353.3A CN202110824353A CN113489498B CN 113489498 B CN113489498 B CN 113489498B CN 202110824353 A CN202110824353 A CN 202110824353A CN 113489498 B CN113489498 B CN 113489498B
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- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 10
- 229920001342 Bakelite® Polymers 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 5
- 239000004637 bakelite Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 238000005493 welding type Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 208000012868 Overgrowth Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0483—Transmitters with multiple parallel paths
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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Abstract
The invention provides an automatic switching system of a high-voltage antenna, which comprises the following components: a transmit signal selection and protection circuit: when two sets of medium wave navigation equipment share one pair of antennas, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, the normally closed ends of the first group of high-voltage vacuum relays are grounded in a lightning-protection mode, a second group of high-voltage vacuum relays have a transmitting signal selection function, and the normally closed ends of the second group of high-voltage vacuum relays are connected with a No. 1 machine by default; the third group of high-voltage vacuum relays have an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning protection mode, so that the antenna lightning protection function is realized when the third group of high-voltage vacuum relays are not used; the control circuit is used for controlling the closing of the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays, and the control signal input ends of the control circuit are on-off signals of the two sets of medium wave navigation equipment.
Description
Technical Field
The invention relates to the technical field of high-voltage antennas, in particular to an automatic switching system of a high-voltage antenna.
Background
Along with the development of scientific technology, the integration level of the medium wave navigation equipment is higher and higher, the remote control capability is diversified, meanwhile, due to the low price of the medium wave navigation equipment, an organic airport adopts a station to be provided with two sets of medium wave navigation equipment and a pair of medium wave navigation antennas, but due to the fact that an antenna feeder system of the medium wave navigation system is a high-voltage part, a general relay cannot complete a remote control switching function, and the medium wave navigation station cannot completely realize an unattended function.
Disclosure of Invention
The object of the present invention is to solve at least one of the technical drawbacks.
Therefore, the invention aims to provide an automatic switching system of a high-voltage antenna.
To achieve the above object, an embodiment of an aspect of the present invention provides an automatic switching system for a high voltage antenna, including:
the transmitting signal selecting and protecting circuit, the control circuit and the delay breaking circuit, wherein,
The transmit signal selection and protection circuit: when two sets of medium wave navigation equipment share one pair of antennas, a transmitting signal firstly passes through a first set of high-voltage vacuum relay, the normally closed end of the first set of high-voltage vacuum relay is grounded in a lightning manner, the second set of high-voltage vacuum relay has a transmitting signal selecting function, and the normally closed end of the second set of high-voltage vacuum relay is connected with a No. 1 machine by default; the third group of high-voltage vacuum relays have an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning protection mode, so that an antenna lightning protection function is achieved when the third group of high-voltage vacuum relays are not used;
The control circuit is used for controlling the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays to be closed, and the control signal input ends of the control circuit are on-off signals of two sets of medium wave navigation equipment, wherein the second group of high-voltage vacuum relays are controlled by on-off signals of a machine No. 2; the first group of high-voltage vacuum relays and the third group of high-voltage vacuum relays are controlled by the output of the on-off signals of the No. 1 and No. 2 machine through the exclusive OR gate, so that when two sets of medium wave navigation equipment are started at the same time, one set of equipment is prevented from burning out the equipment due to the fact that the antenna is not connected;
The delay breaking circuit: the method comprises the steps that self-checking is firstly carried out after the medium wave navigation equipment is started, after the self-checking is carried out, the power of a transmitter is gradually increased to a preset value, a high-voltage vacuum relay works, the relay has load capacity, and the relay is normally used in the starting stage; when the equipment is shut down, the high-voltage vacuum relay is turned off by the delay turn-off circuit for shutting down or stopping the power suddenly, so as to protect the equipment;
The working procedure is as follows:
(1) When the machines 1 and 2 are shut down, the first group and the third group of high-voltage vacuum relays do not act, and the normally closed end is grounded, so that equipment and an antenna are protected;
(2) When the machine 1 is started and the machine 2 is shut, the first group of relays and the third group of relays act, the second group of relays do not act, and the machine 1 transmits signals to the antenna;
(3) When the machine No. 2 is started and the machine No. 1 is shut, the first group, the second group and the third group of high-voltage vacuum relays act, and the machine No. 2 transmits signals to the antenna;
(4) When the machines 1 and 2 are started, the first group of high-voltage vacuum relays do not act, the machines 1 and 2 are grounded, the antenna tuner is not tuned at the moment, the standing wave ratio of the equipment is alarmed, the power output power is small at the moment, and the equipment is protected;
(5) If one of the devices needs to be debugged, the control cable on the device needing to be debugged is pulled down, and the voltage at the position is automatically changed into low voltage, so that the device is not started, and the normal use of the other device is not affected.
Furthermore, the high-voltage antenna automatic switching system fixes all devices by adopting an epoxy glass cloth plate, wherein the front surface of the high-voltage antenna automatic switching system is a high-voltage device, and the back surface of the high-voltage antenna automatic switching system is a low-voltage device.
Further, the front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, the radio frequency signal is welded through copper wires, the overlength of the copper wires is fixed through an insulating bracket, and the crossing of the copper wires is isolated by bakelite rods; the control circuit on the back side is welded on a printed board and is connected to the control end of each relay through a cable, wherein the front side and the back side are covered by two cover plates.
Further, the control circuit of the back side includes: the device comprises a printing plate, a first delay power-off relay, a second delay power-off relay, an adapter or an AC-DC module, wherein the adapter or the AC-DC module is connected with external 220V alternating current, the printing plate is respectively connected with a No. 1 machine control signal and a No. 2 machine control signal, and the printing plate is respectively connected with the first delay power-off relay and the second delay power-off relay.
Further, the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays correspond to the first group of high-voltage vacuum relays and the second group of high-voltage vacuum relays, the third group of high-voltage vacuum relays correspond to the selection of the No. 1 and No. 2 machines, the fifth high-voltage vacuum relay is connected with the protection antenna,
Further, the adapter adopts an adapter from 220V to 12V.
Further, the on-off interval of the two sets of equipment is more than the power-off delay relay time +2S.
Further, a delay relay is adopted, the relay policy is sucked, when the control signal disappears and the delay is delayed, the relay is disconnected and used for protecting equipment, and the delay time is adjustable;
A control logic circuit is selected for controlling the closing of three groups of high-voltage vacuum relays, the second group of high-voltage vacuum relays are protected by No. 2 machine, the delay time is adjustable, the adjustable range is selected for the control logic circuit
Further, the normally closed end of the relay and the transmitting signal selecting and protecting circuit, the core device of the antenna automatic converter is a ceramic high-voltage vacuum relay, the high-voltage vacuum relay is single-pole double-throw, and the vacuum relay can be effectively extinguished when disconnected under load; the wear-resistant tungsten contact is suitable for frequent load operation; and the flange type and the bolt type are adopted, and the bolt type or the welding type high-pressure connector is adopted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a front connection block diagram of a high voltage antenna automatic switching system according to an embodiment of the present invention;
fig. 2 is a reverse connection block diagram of a high voltage antenna automatic switching system according to an embodiment of the present invention;
fig. 3 is a functional block diagram of a high voltage antenna automatic switching system according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The invention provides an automatic high-voltage antenna switching system which is used for switching a medium-wave navigation antenna, medium-wave navigation equipment, lightning ground and the like.
As shown in fig. 1, a high voltage antenna automatic switching system according to an embodiment of the present invention includes: the device comprises a transmitting signal selecting and protecting circuit, a control circuit and a delay breaking circuit.
Specifically, the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one pair of antennas, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, and NC (normally closed end) of each relay is grounded in a lightning protection way, so that equipment damage caused by control circuit faults or mistaken starting of users is prevented, and the function of protecting the equipment is achieved; the second group of high-voltage vacuum relays have the function of selecting transmitting signals (number 1 and number 2), and the NC end is connected with the number 1 by default; the third group of high-voltage vacuum relays have the antenna protection function, and the NC terminal is grounded and plays a role in antenna lightning protection when not in use.
The control circuit is used for controlling the closing of the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays, the control part mainly controls the closing of the three groups of high-voltage vacuum relays, and the control signal input ends are on-off signals of the two sets of medium wave navigation equipment. The second group of high-voltage vacuum relays are controlled by on-off signals of the No. 2 machine. The first and the third groups of high-voltage vacuum relays are controlled by the on-off signals of the No. 1 and No. 2 machine through the output of the exclusive OR gate, so that when two sets of medium wave navigation equipment are started at the same time, one set of equipment is prevented from burning out the equipment due to the fact that the antenna is not connected.
A time delay disconnection circuit: the medium wave navigation equipment is self-checked firstly after being started, and after the self-check is correct, the transmitter (if the medium wave navigation equipment is started) gradually increases the power to a set value, at the moment, the high-voltage vacuum relay works and has a certain load carrying capacity, so that the medium wave navigation equipment can be normally used in the starting stage. When the equipment is shut down, because the capacitance in the equipment is more, certain power output still exists in a short time after the power failure, at the moment, if the high-voltage vacuum relay stops working, the possibility of damaging the equipment exists, so a delay breaking circuit is needed to be added for switching off the high-voltage vacuum relay in a delay manner when the equipment is shut down or suddenly powered off, and the function of protecting the equipment is achieved.
In summary, the high voltage relay is used for switching the signals transmitted by the two wave guide navigation machines, and the selected equipment radio frequency signals are sent to the antenna. The relay is a vacuum medium, can be effectively extinguished when disconnected under load, can instantly bear tens of thousands of volts, can be operated frequently, and has long service life. The invention selects a delay relay which is used for being disconnected when the control signal disappears and delays, thereby playing the role of protecting equipment and having adjustable delay time. The invention adopts a logic circuit, and only when one of the two devices is started and transmits, the antenna is connected, and the antenna is connected to the lightning protection ground at ordinary times. In addition, the invention adopts an epoxy glass cloth plate as a fixed plate, the front surface is a high-voltage device, and the back surface is a low-voltage device. The front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, is connected through copper wires, the copper wires are fixed through insulating supports, and the copper wire intersections are isolated through bakelite rods. The back control part is welded on a printed board and connected to the control ends of the relays through cables. The marks are added at the joints of the front and back surfaces, so that the identification is convenient.
In the embodiment of the invention, a high-voltage relay is selected, and the relay is a vacuum medium, and can be effectively extinguished when disconnected under load; the wear-resistant tungsten contact is suitable for frequent load operation; two alternative mounting modes, flange type and bolt type; the bolt type or welding type high-voltage connector is simple in wiring. And a delay relay is selected, the relay is normally attracted, but is disconnected when the control signal disappears and is used for protecting equipment, the delay time is adjustable, and the adjustable range is 0.1 s-100 h. A control logic circuit is selected to control the closing of three groups of high-voltage vacuum relays, the input ends of control signals are on-off signals of two sets of medium wave navigation equipment, and the second group of high-voltage vacuum relays are controlled by on-off signals of a No. 2 machine. The first group and the third group are controlled by the on-off signals of the No. 1 machine and the No. 2 machine after being output by the exclusive OR gate, so that when two sets of medium wave navigation equipment are started at the same time, one set of equipment is prevented from burning out the equipment due to the fact that the antenna is not connected. The converter is characterized in that each device is fixed by using an epoxy glass cloth plate, the front surface is a high-voltage device, and the back surface is a low-voltage device. The front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, radio frequency signals are welded through phi 3 copper wires, the overgrowth of the copper wires is fixed through the insulating support, and the crossing of the copper wires is isolated by bakelite rods. The back control part is welded on a printed board and connected to the control ends of the relays through cables. The front and back sides are covered by two cover plates, the front side is marked with an antenna automatic converter, and the joints of the front and back sides are added with marks.
The following describes the operation flow of the automatic switching system of high-voltage antenna according to the present invention:
(1) When the machines 1 and 2 are turned off, the first group of relays and the third group of relays do not act, the NC end is grounded, and the equipment and the antenna are protected.
(2) When the machine 1 is started and the machine 2 is shut down, the first group of relays and the third group of relays act, the second group of relays do not act, and the signal transmitted by the machine 1 is transmitted to the antenna.
(3) When the machine No.2 is started and the machine No. 1 is shut, the first, second and third groups of relays act, and the signal transmitted by the machine No.2 is transmitted to the antenna.
(4) When the number 1 machine and the number 2 machine are started (including the number 1 machine is connected with an antenna, the number 2 machine is connected with a load or the number 2 machine is connected with an antenna, the number 1 machine is connected with a load or the number 1 machine and the number 2 machine are connected with a load), the first group of relays do not act, the number 1 machine and the number 2 machine are grounded, at the moment, the antenna tuner is not tuned, the standing wave ratio of the equipment is alarmed, at the moment, the power output is very small, and the equipment is protected.
(5) If one of the devices needs to be debugged (connected with a load), the control cable on the device to be debugged can be pulled out, and the voltage at the position is automatically changed into low voltage, which means that the device is not started, and the normal use of the other device is not affected.
The device is self-checked when being started, and after the self-check is completed, the transmitter (such as the device is started) gradually increases the power to the set value, and at the moment, the high-voltage vacuum relay works and has a certain load capacity, so that the device can be normally used in the starting stage. When the equipment is shut down, because the capacitance in the equipment is more, certain power output still exists in a short time after the power failure, at the moment, if the high-voltage vacuum relay stops working, the possibility of damaging the equipment exists, so a delay disconnection relay is needed to be added for disconnecting the high-voltage vacuum relay in a delay manner when the equipment is shut down or suddenly powered off, and the function of protecting the equipment is achieved. The delay time of the delay relay is adjustable, the adjustable range is 0.1 s-100 h,
In the aspect of power supply, an external independent power supply is adopted to ensure the stability and the reliability of the equipment. An adapter or an AC/DC module (220V to 12V) can be selected to supply power to devices in the converter respectively.
Structurally, the converter is constructed by fixing the devices with an epoxy glass cloth plate (400 x 400), the layout is shown in fig. 1 and 2, the front side is a high-voltage device, and the back side is a low-voltage device. The front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, radio frequency signals are welded through phi 3 copper wires, the overgrowth of the copper wires is fixed through the insulating support, and the crossing of the copper wires is isolated by bakelite rods. The back control part is welded on a printed board and connected to the control ends of the relays through cables. The front and back sides are covered by two cover plates, and the front side is marked with an antenna automatic converter.
Referring to fig. 1 and 2, wherein the input: the radio frequency signals of the 2-path medium wave navigation transmitter, the control signals of the 2-path medium wave navigation transmitter and the 220V input of the 1-path commercial power. And an output end: the radio frequency signal output (1 path) is connected with the through-wall terminal, and the 1 path is connected with the lightning ground.
The antenna automatic converter core device is a ceramic high-voltage vacuum relay, and the relay has the following advantages:
① The vacuum medium is disconnected under load, so that effective arc extinction can be realized;
② The wear-resistant tungsten contact is suitable for frequent load operation;
③ Two alternative mounting modes, flange type and bolt type;
④ The bolt type or welding type high-voltage connector is simple in wiring.
The relay is single-pole double-throw, flange-type, welded, and has a maximum working voltage of 15kv, and can meet the signal output of 500W transmitter
Referring to fig. 3, 3 groups (4) of high-voltage vacuum relays are selected, 2 paths of emission signals firstly pass through a first group (2) of high-voltage vacuum relays, the group of relays are grounded in an NC terminal, equipment damage caused by control circuit faults or mistaken starting of users is prevented, the function of protecting equipment is achieved, the control signals are output signals after 2 paths of on-off signals pass through an exclusive-OR gate, the group of relays are conducted only when 1 path of equipment in the 2 paths of equipment is started, the emission signals enter the next relay, and the 2 paths of equipment are connected with the ground in an on-state or off-state. The second group (1) of high-voltage vacuum relays has the function of selecting emission signals (No. 1 and No. 2), the NC end is connected with the No. 1 machine by default, and the control signal is the on-off signal of the No. 2 machine. The third group (1) of high-voltage vacuum relays has an antenna protection function, the NC terminal is in lightning-protection, the NC terminal plays a role in antenna lightning-protection when not in use, a control signal is an output signal of 2 paths of switching signals after the switching signals pass through an exclusive-OR gate, the group of relays can be conducted only when 1 path of equipment in 2 paths of equipment is started, a transmitting signal is sent into an antenna, and the 2 paths of equipment are connected to the antenna lightning-protection ground when all the 2 paths of equipment are started or all the equipment are shut down.
According to the high-voltage antenna automatic switching system provided by the embodiment of the invention, the high-voltage relay is selected, and meanwhile, the on and off of each relay are controlled by taking two sets of equipment starting signals as control signals, so that the function of automatically connecting the antenna is realized.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An automatic switching system for a high voltage antenna, comprising: the transmitting signal selecting and protecting circuit, the control circuit and the delay breaking circuit, wherein,
The transmit signal selection and protection circuit: when two sets of medium wave navigation equipment share one pair of antennas, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, the normally closed ends of the first group of high-voltage vacuum relays are grounded in a lightning-protection manner, a second group of high-voltage vacuum relays have a transmitting signal selection function, and the normally closed ends of the second group of high-voltage vacuum relays are connected with a No. 1 machine by default; the third group of high-voltage vacuum relays have an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning protection mode, so that an antenna lightning protection function is achieved when the third group of high-voltage vacuum relays are not used; the number of the relays of the first group of high-voltage vacuum relays is 2, the number of the relays of the second group of high-voltage vacuum relays is 1, and the number of the relays of the third group of high-voltage vacuum relays is 1;
The control circuit is used for controlling the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays to be closed, and the control signal input ends of the control circuit are on-off signals of two sets of medium wave navigation equipment, wherein the second group of high-voltage vacuum relays are controlled by on-off signals of a machine No. 2; the first group of high-voltage vacuum relays and the third group of high-voltage vacuum relays are controlled by the output of the on-off signals of the No. 1 and No. 2 machine through the exclusive OR gate, so that when two sets of medium wave navigation equipment are started at the same time, one set of equipment is prevented from burning out the equipment due to the fact that the antenna is not connected;
The delay breaking circuit: the method comprises the steps that self-checking is firstly carried out after the medium wave navigation equipment is started, after the self-checking is carried out, the power of a transmitter is gradually increased to a preset value, a high-voltage vacuum relay works, the relay has load capacity, and the relay is normally used in the starting stage; when the equipment is shut down, the high-voltage vacuum relay is turned off by the delay turn-off circuit for shutting down or stopping the power suddenly, so as to protect the equipment;
The machine 1 refers to one set of medium wave navigation equipment in two sets of medium wave navigation equipment, and the machine 2 refers to the other set of medium wave navigation equipment in the two sets of medium wave navigation equipment;
The working procedure is as follows:
(1) When the machines 1 and 2 are shut down, the first group and the third group of high-voltage vacuum relays do not act, and the normally closed end is grounded, so that equipment and an antenna are protected;
(2) When the machine 1 is started and the machine 2 is shut, the first group of relays and the third group of relays act, the second group of relays do not act, and the machine 1 transmits signals to the antenna;
(3) When the machine No. 2 is started and the machine No. 1 is shut, the first group, the second group and the third group of high-voltage vacuum relays act, and the machine No. 2 transmits signals to the antenna;
(4) When the machines 1 and 2 are started, the first group of high-voltage vacuum relays do not act, the machines 1 and 2 are grounded, at the moment, the antenna tuner is not tuned, and the standing wave ratio of the equipment is alarmed;
(5) If one of the devices needs to be debugged, the control cable on the device needing to be debugged is pulled down, and the voltage at the position is automatically changed into low voltage, so that the device is not started, and the normal use of the other device is not affected.
2. The automatic high-voltage antenna switching system according to claim 1, wherein the automatic high-voltage antenna switching system fixes each device by using an epoxy glass cloth plate, and the front surface is a high-voltage device and the back surface is a low-voltage device.
3. The automatic switching system of high-voltage antenna according to claim 1, wherein the front ceramic high-voltage vacuum relay is fixed on the insulating plate by screws, the radio frequency signal is welded by copper wires, the copper wires are fixed by insulating brackets, and the copper wire intersections are isolated by bakelite rods; the control circuit on the back side is welded on a printed board and is connected to the control end of each relay through a cable, wherein the front side and the back side are covered by two cover plates.
4. The automatic switching system of high voltage antennas according to claim 1, wherein the on-off intervals of the two sets of equipment are more than +2s of the power-off delay relay time.
5. The automatic switching system of the high-voltage antenna according to claim 1, wherein the delay disconnection circuit adopts a delay relay, the delay relay is in attraction, and is disconnected when the control signal disappears, so as to protect equipment, and the delay time is adjustable;
The control circuit is used for controlling the closing of three groups of high-voltage vacuum relays, the second group of high-voltage vacuum relays are protection equipment of the No. 2 machine, the delay time is adjustable, the adjustable range is selected and used for controlling.
6. The automatic high-voltage antenna switching system according to claim 1, wherein the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays, and the third group of high-voltage vacuum relays are all ceramic high-voltage vacuum relays, and the high-voltage vacuum relays are single-pole double-throw; the ceramic high-voltage vacuum relay is provided with a wear-resistant tungsten contact; the ceramic high-voltage vacuum relay adopts two mounting modes of flange type or bolt type, and is provided with a bolt type or welding type high-voltage connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824353.3A CN113489498B (en) | 2021-07-21 | 2021-07-21 | Automatic switching system of high-voltage antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824353.3A CN113489498B (en) | 2021-07-21 | 2021-07-21 | Automatic switching system of high-voltage antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113489498A CN113489498A (en) | 2021-10-08 |
| CN113489498B true CN113489498B (en) | 2024-05-28 |
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| CN202110824353.3A Active CN113489498B (en) | 2021-07-21 | 2021-07-21 | Automatic switching system of high-voltage antenna |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB575462A (en) * | 1944-03-17 | 1946-02-19 | Standard Telephones Cables Ltd | Improvements in radio communication systems |
| CN202306219U (en) * | 2011-10-08 | 2012-07-04 | 重庆洪深现代视声技术有限公司 | Switching controller for transmitter antenna |
| CN207896969U (en) * | 2018-03-06 | 2018-09-21 | 广西电网有限责任公司来宾供电局 | A kind of one aerial signal selector of multiselect |
| CN208923355U (en) * | 2018-08-09 | 2019-05-31 | 咸阳直标机电设备有限公司 | A kind of medium wave transmitter antenna feeder line automation changeover apparatus |
| CN110429944A (en) * | 2019-07-15 | 2019-11-08 | 交通运输部北海航海保障中心天津通信中心 | A kind of antenna exchanger and system for intermediate frequency sender |
| CN213367631U (en) * | 2020-08-26 | 2021-06-04 | 北京动力源科技股份有限公司 | Industrial power supply on-off control circuit and control cabinet |
| CN217721162U (en) * | 2021-07-21 | 2022-11-01 | 天津七六四通信导航技术有限公司 | Automatic switching device for high-voltage antenna |
-
2021
- 2021-07-21 CN CN202110824353.3A patent/CN113489498B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB575462A (en) * | 1944-03-17 | 1946-02-19 | Standard Telephones Cables Ltd | Improvements in radio communication systems |
| CN202306219U (en) * | 2011-10-08 | 2012-07-04 | 重庆洪深现代视声技术有限公司 | Switching controller for transmitter antenna |
| CN207896969U (en) * | 2018-03-06 | 2018-09-21 | 广西电网有限责任公司来宾供电局 | A kind of one aerial signal selector of multiselect |
| CN208923355U (en) * | 2018-08-09 | 2019-05-31 | 咸阳直标机电设备有限公司 | A kind of medium wave transmitter antenna feeder line automation changeover apparatus |
| CN110429944A (en) * | 2019-07-15 | 2019-11-08 | 交通运输部北海航海保障中心天津通信中心 | A kind of antenna exchanger and system for intermediate frequency sender |
| CN213367631U (en) * | 2020-08-26 | 2021-06-04 | 北京动力源科技股份有限公司 | Industrial power supply on-off control circuit and control cabinet |
| CN217721162U (en) * | 2021-07-21 | 2022-11-01 | 天津七六四通信导航技术有限公司 | Automatic switching device for high-voltage antenna |
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| Publication number | Publication date |
|---|---|
| CN113489498A (en) | 2021-10-08 |
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