CN113489498A - Automatic switching system of high-voltage antenna - Google Patents
Automatic switching system of high-voltage antenna Download PDFInfo
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- CN113489498A CN113489498A CN202110824353.3A CN202110824353A CN113489498A CN 113489498 A CN113489498 A CN 113489498A CN 202110824353 A CN202110824353 A CN 202110824353A CN 113489498 A CN113489498 A CN 113489498A
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- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 229920001342 Bakelite® Polymers 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 5
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- 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
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- 230000003111 delayed effect Effects 0.000 claims 1
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- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
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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: emission signal selection and protection circuit: when the two sets of medium wave navigation equipment share one antenna, 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 connected with a lightning ground, 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 has an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning-protection manner, so that the third group of high-voltage vacuum relays play a lightning-protection role when 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 input ends of control signals 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
With the development of science and technology, the integration level of medium wave navigation equipment is higher and higher, the remote control capability is diversified, meanwhile, because the medium wave navigation equipment is low in price, some airports adopt a station to be equipped with two sets of medium wave navigation equipment and a set of medium wave navigation antenna, but because an antenna feed system of the medium wave navigation system is a high-voltage part, a common relay cannot complete the remote control switching function, and the medium wave navigation station cannot completely realize the unattended function.
Disclosure of Invention
The object of the present invention is to solve at least one of the technical drawbacks mentioned.
Therefore, the invention aims to provide an automatic switching system of a high-voltage antenna.
In order 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:
a transmission signal selection and protection circuit, a control circuit and a time delay disconnection circuit, wherein,
the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one antenna, 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 connected with a lightning ground, the 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 has an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning-proof manner, so that the third group of high-voltage vacuum relays play a lightning-proof role of the antenna when not in use;
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 the on-off signals of the No. 2 machine; the first group of high-voltage vacuum relays and the third group of high-voltage vacuum relays are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through an exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that an antenna is not connected;
the delay disconnection circuit: the medium wave navigation equipment is self-checked after being started, after the self-check is correct, the transmitter gradually increases the power to a preset value, the high-voltage vacuum relay works and has loading capacity, and the high-voltage vacuum relay is normally used in a starting stage; when the equipment is shut down, the delay disconnection circuit is used for delaying the disconnection of the high-voltage vacuum relay when the equipment is shut down or is suddenly powered off, so that the function of protecting the equipment is achieved;
the working process 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 ends are grounded, so that equipment and an 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 sent to the antenna;
(3) when the machine No. 2 is started and the machine No. 1 is shut down, the first group, the second group and the third group of high-voltage vacuum relays all act, and the machine No. 2 transmits a signal 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 cannot be tuned at the moment, the standing-wave ratio of the equipment alarms, the power output power is low at the moment, and the equipment is protected;
(5) if one device needs debugging, the control cable on the device needing debugging is pulled down, the voltage at the position is automatically changed into low voltage, and the device is not started and the normal use of the other device is not influenced.
Furthermore, the high-voltage antenna automatic switching system adopts an epoxy glass cloth plate to fix all devices, and the front side of the high-voltage antenna automatic switching system is a high-voltage device, and the back side of the high-voltage antenna automatic switching system is a low-voltage device.
Further, the front ceramic high-voltage vacuum relay is fixed on an insulating plate through screws, radio-frequency signals are welded through copper wires, the position where the copper wires pass is fixed through an insulating support, and the cross positions of the copper wires are isolated by bakelite rods; and 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, and the front side and the back side of the printed board are covered by two cover plates.
Further, the control circuit of the reverse side includes: the adapter or the AC-DC module is connected with external 220V alternating current, the printed board is respectively connected with a No. 1 machine control signal and a No. 2 machine control signal, and the printed board is respectively connected with the first delay power-off relay and the second delay power-off relay.
Furthermore, a first group of high-voltage vacuum relays, a second group of high-voltage vacuum relays, a third group of high-voltage vacuum relays, protective equipment, a protection antenna, a third group of high-voltage vacuum relays and a protection antenna, wherein the third group of high-voltage vacuum relays correspond to the selection of the No. 1 machine and the No. 2 machine,
further, the adapter adopts an adapter of 220V to 12V.
Furthermore, the on-off interval of the two sets of equipment is more than +2S of the power-off delay relay time.
Furthermore, a delay relay is adopted, the relay is actuated according to a policy, and is disconnected when the control signal disappears and delays, so that the relay is used for protecting equipment, and the delay time is adjustable;
the control logic circuit is selected to control the closing of the three groups of high-voltage vacuum relays, the second group of high-voltage vacuum relays is a protective device of a No. 2 machine, the delay time is adjustable, the range is adjustable, and the control logic circuit is selected
Furthermore, a normally closed end of the relay and a transmission signal selection and protection circuit are adopted, a 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 arc can be effectively extinguished when a vacuum medium is disconnected under a load; wear-resistant tungsten contacts suitable for frequent load operations; the method adopts two mounting modes of a flange type and a bolt type, namely a bolt type or a welding type high-pressure joint.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of 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 the automatic switching system of the high-voltage antenna according to the embodiment of the invention;
fig. 3 is a schematic block diagram of an automatic switching system for high-voltage antennas according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides an automatic switching system of a high-voltage antenna, which is used for switching a medium-wave navigation antenna, medium-wave navigation equipment, a lightning ground and the like.
As shown in fig. 1, the automatic switching system for high-voltage antenna according to the embodiment of the present invention includes: the device comprises a transmitting signal selection and protection circuit, a control circuit and a time delay disconnection circuit.
Specifically, the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one antenna, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, and an NC (normally closed end) of each relay is connected with a lightning ground, so that the equipment is prevented from being damaged due to the fault of a control circuit or the mistaken start of a user, and the function of protecting the equipment is achieved; the second group of high-voltage vacuum relays have the function of transmitting signals (No. 1 and No. 2 machines) selection, and the NC end is connected with the No. 1 machine by default; the third group of high-voltage vacuum relays has an antenna protection function, and the NC end is connected with a lightning ground, so that the lightning protection function of the antenna is achieved when the vacuum relay is 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, the control part mainly controls the closing of the three groups of high-voltage vacuum relays, and the input ends of control signals are on-off signals of the two sets of medium wave navigation equipment. Wherein, the second group of high-voltage vacuum relays are controlled by the on-off signal of the No. 2 machine. The first and third groups of high-voltage vacuum relays are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through the exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that the antenna is not connected.
The time-delay disconnection circuit: the medium wave navigation equipment is started and then self-checked, after the self-check is correct, the transmitter (if started) gradually increases the power to a set value, at the moment, the high-voltage vacuum relay works and the relay has certain loading capacity, so the high-voltage vacuum relay 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 power failure, and if the high-voltage vacuum relay stops working at the moment, the equipment can be damaged, so a delay disconnection circuit is required to be added for delaying the disconnection of the high-voltage vacuum relay when the equipment is shut down or power failure suddenly, 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 medium-voltage wave-guided navigation devices and sending the selected radio-frequency signals of the equipment to the antenna. The relay is a vacuum medium, can effectively extinguish arc when being disconnected under load, can instantaneously bear the voltage of tens of thousands of volts, can be frequently operated and has long service life. The invention selects a delay relay for disconnection 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, only when one of the two devices is started and transmits, the antenna is switched on, and the antenna is normally connected to the lightning ground. In addition, the invention adopts an epoxy glass cloth plate as a fixing plate, the front side is a high-voltage device, and the back side is a low-voltage device. The ceramic high-voltage vacuum relay on the front side is fixed on the insulating plate through screws and connected through copper wires, the copper wires are fixed by an insulating support, and the copper wire intersections are isolated by bakelite rods. The reverse control part is welded on a printed board and is connected to the control ends of the relays through cables. Marks are added at the joints of the front surface and the back surface, so that the identification is convenient.
In the embodiment of the invention, a high-voltage relay is selected, the relay is a vacuum medium, and arc can be effectively extinguished when the relay is disconnected under a load; wear-resistant tungsten contacts suitable for frequent load operations; two optional mounting modes, namely a flange mode and a bolt mode; the bolt type or welding type high-pressure joint has simple wiring. And (3) selecting a delay relay, normally closing the relay, disconnecting the relay when the control signal disappears and delaying for protecting equipment, wherein the delay time is adjustable and is in an adjustable range of 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 the on-off signals of No. 2 machine. The first group and the third group are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through an exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that the antenna is not connected. The converter fixes all devices by using an epoxy glass cloth plate, wherein 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, a radio-frequency signal is welded through phi 3 copper wires, the position where the copper wires pass through is fixed through an insulating support, and the cross position of the copper wires is isolated through a bakelite rod. The reverse control part is welded on a printed board and is connected to the control ends of the relays through cables. The front and back surfaces are covered by two cover plates, the front surface is marked with an 'antenna automatic converter', and marks are added at the joints of the front and back surfaces.
The following describes the working process of the automatic switching system for high-voltage antenna according to the present invention:
(1) when the machines 1 and 2 are shut down, the first and third groups of relays do not act, the NC ends are grounded, and the equipment and the antenna are protected.
(2) When the No. 1 machine is started and the No. 2 machine 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 No. 1 machine transmits signals to the antenna.
(3) When the machine No. 2 is started and the machine No. 1 is shut down, the first, the second and the third groups of relays act, and the signal transmitted by the machine No. 2 is sent to the antenna.
(4) When the number 1 and the number 2 machines are both started (including the number 1 machine connected with the antenna, the number 2 machine connected with the load or the number 2 machine connected with the antenna, the number 1 machine connected with the load or the number 1 and the number 2 machines connected with the load), the first group of relays do not act, the number 1 and the number 2 machines are both grounded, the antenna tuner is not tuned at the moment, the standing-wave ratio of the equipment alarms, the power output is very small at the moment, 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 down, the voltage at the position is automatically changed into low voltage, which represents that the device is not started, and the normal use of the other device is not influenced at the moment.
The high-voltage vacuum relay works and has certain loading capacity, so that the equipment can be normally used in the starting-up 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 power failure, if the high-voltage vacuum relay stops working at this moment, the equipment can be damaged, so a delay disconnection relay needs to be added for delaying the disconnection of the high-voltage vacuum relay when the equipment is shut down or power failure suddenly, and the function of protecting the equipment is played. The delay relay has adjustable delay time within 0.1 s-100 h,
in the aspect of power supply, an external independent power supply is adopted to ensure the stability and reliability of the equipment. An adapter or an AC/DC module (220V to 12V) can be selected for supplying power to the devices in the converter respectively.
Structurally, the transducer is constructed by mounting the devices in a single epoxy glass cloth plate (400 x 400) having a high voltage device on the front side and a low voltage device on the back side, as shown in fig. 1 and 2. The front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, a radio-frequency signal is welded through phi 3 copper wires, the position where the copper wires pass through is fixed through an insulating support, and the cross position of the copper wires is isolated through a bakelite rod. The reverse control part is welded on a printed board and is 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 terminal: 2-path medium wave navigation transmitter radio frequency signals, 2-path medium wave navigation transmitter control signals and 1-path commercial power 220V input. Output end: the radio frequency signal output (1 path) is connected with a through wall terminal, and the 1 path is connected with a lightning ground.
The core device of the antenna automatic converter is a ceramic high-voltage vacuum relay, and the relay has the following advantages:
firstly, vacuum medium is cut off under load, so that arc can be effectively extinguished;
secondly, the wear-resistant tungsten contact is suitable for frequent load operation;
two optional mounting modes, namely a flange type and a bolt type;
bolt type or welding type high-pressure joint, the wiring is simple.
The relay is single-pole double-throw, flange-type installation and welding, the maximum working voltage is 15kv, and the signal output of a 500W transmitter can be met
Referring to fig. 3, 3 sets (4) of high-voltage vacuum relays are selected, 2 paths of emission signals firstly pass through the first set (2) of high-voltage vacuum relays, the NC end of the set of relays is connected with a lightning protection ground, the device damage caused by the fault of a control circuit or the error starting of a user is prevented, the device is protected, the control signal is an output signal of 2 paths of on-off signals passing through an exclusive or gate, the set of relays are conducted only when 1 path of devices in 2 paths of devices are started, the emission signals enter the next relay, and the 2 paths of devices are connected into the lightning protection ground when the devices are started or shut down. The second group (1) of high-voltage vacuum relays have the functions of transmitting signals (1 and 2 machines) and selecting, the NC end is connected with the 1 machine by default, and the control signal is the on-off signal of the 2 machine. The third group (1) of high-voltage vacuum relays have an antenna protection function, an NC end is connected with a lightning ground, the lightning protection function of the antenna is achieved when the high-voltage vacuum relays are not used, the control signal is an output signal of 2 paths of on-off signals after passing through an XOR gate, the group of relays are switched on only when 1 path of equipment in 2 paths of equipment is started, the transmitting signal is sent to the antenna, and the high-voltage vacuum relays are switched in the lightning ground of the antenna when 2 paths of equipment are started or all are shut down.
According to the automatic switching system of the high-voltage antenna, the high-voltage relay is selected, and meanwhile, the on and off of each relay are controlled by taking the starting signals of two sets of equipment as control signals, so that the function of automatically connecting the antenna is realized.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. An automatic switching system for high voltage antenna, comprising: a transmission signal selection and protection circuit, a control circuit and a time delay disconnection circuit, wherein,
the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one antenna, 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 connected with a lightning ground, the 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 has an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning-proof manner, so that the third group of high-voltage vacuum relays play a lightning-proof role of the antenna when not in use;
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 the on-off signals of the No. 2 machine; the first group of high-voltage vacuum relays and the third group of high-voltage vacuum relays are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through an exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that an antenna is not connected;
the delay disconnection circuit: the medium wave navigation equipment is self-checked after being started, after the self-check is correct, the transmitter gradually increases the power to a preset value, the high-voltage vacuum relay works and has loading capacity, and the high-voltage vacuum relay is normally used in a starting stage; when the equipment is shut down, the delay disconnection circuit is used for delaying the disconnection of the high-voltage vacuum relay when the equipment is shut down or is suddenly powered off, so that the function of protecting the equipment is achieved;
the working process 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 ends are grounded, so that equipment and an 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 sent to the antenna;
(3) when the machine No. 2 is started and the machine No. 1 is shut down, the first group, the second group and the third group of high-voltage vacuum relays all act, and the machine No. 2 transmits a signal 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 cannot be tuned at the moment, the standing-wave ratio of the equipment alarms, the power output power is low at the moment, and the equipment is protected;
(5) if one device needs debugging, the control cable on the device needing debugging is pulled down, the voltage at the position is automatically changed into low voltage, and the device is not started and the normal use of the other device is not influenced.
2. The automatic switching system for high voltage antenna of claim 1, wherein the automatic switching system for high voltage antenna is formed by fixing each device by using a glass cloth plate with epoxy, and the front side is a high voltage device and the back side is a low voltage device.
3. The automatic switching system of 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 over-length of the copper wires is fixed by an insulating bracket, and the crossing of the copper wires is isolated by bakelite rods; and 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, and the front side and the back side of the printed board are covered by two cover plates.
4. The automatic switching system for high voltage antenna of claim 1, wherein the control circuit of the reverse side comprises: the adapter or the AC-DC module is connected with external 220V alternating current, the printed board is respectively connected with a No. 1 machine control signal and a No. 2 machine control signal, and the printed board is respectively connected with the first delay power-off relay and the second delay power-off relay.
5. The automatic switching system of high voltage antenna as claimed in claim 1, wherein the protection device corresponds to the first set of high voltage vacuum relay and the second set of high voltage vacuum relay, the third set of high voltage vacuum relay corresponds to the selection of the number 1 and 2 machines, and the fifth high voltage vacuum relay is connected with the protection antenna.
6. The automatic switching system for high-voltage antenna according to claim 1, wherein said adapter is an adapter converting 220V to 12V.
7. The automatic switching system for high-voltage antennas of claim 1, wherein the on/off interval of two sets of equipment is more than +2S of the power-off delay relay time.
8. The automatic switching system of high-voltage antenna according to claim 1, wherein a delay relay is adopted, the relay is switched on and off when the control signal disappears and the delay is delayed, so that the delay time is adjustable and used for protecting the equipment;
the control logic circuit is selected to control the closing of the three groups of high-voltage vacuum relays, and the second group of high-voltage vacuum relays is controlled by the protection equipment of the No. 2 machine, and has adjustable delay time and adjustable range.
9. The automatic switching system for high-voltage antenna according to claim 1, wherein the normally closed end of the relay and the transmission signal selection and protection circuit, the core device of the automatic antenna switching system is a ceramic high-voltage vacuum relay, the high-voltage vacuum relay is single-pole double-throw, and for vacuum medium, the switching-off under load can effectively extinguish arc; wear-resistant tungsten contacts suitable for frequent load operations; the method adopts two mounting modes of a flange type and a bolt type, namely a bolt type or a welding type high-pressure joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824353.3A CN113489498B (en) | 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 | Automatic switching system of high-voltage antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113489498A true CN113489498A (en) | 2021-10-08 |
| CN113489498B CN113489498B (en) | 2024-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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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