CN200968988Y - 144MHz wave band radio direction finding machine - Google Patents
144MHz wave band radio direction finding machine Download PDFInfo
- Publication number
- CN200968988Y CN200968988Y CN 200620159200 CN200620159200U CN200968988Y CN 200968988 Y CN200968988 Y CN 200968988Y CN 200620159200 CN200620159200 CN 200620159200 CN 200620159200 U CN200620159200 U CN 200620159200U CN 200968988 Y CN200968988 Y CN 200968988Y
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- circuit
- 144mhz
- wave band
- antenna
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Abstract
The utility model discloses a radio direction finder set with wave band of 144 MHz which comprises an antenna wave director, a Hertz antenna and a reflector. The antenna wave director is connected with a wave directing pole which is fixed on the top of a shell. The shell is provided with a circuit cabin, a power cabin and a swallowtail. The head end of the shell is connected with the Hertz antenna. The swallowtail is connected with the reflector. The circuit cabin is provided with receiving circuit. The shell is also provided with a frequency modulating button connected with the receiving circuit, a volume adjusting button and an earphone jack. The power cabin is provided with a power flexibly. The earphone jack has an earphone which can be inserted in the earphone jack. The antenna wave director, the Hertz antenna and the reflector are mainly composed of a soft steel belt of a screwing hoop with inner thread at one end. The soft steel belt is also provided with a waterproof course at the outer side. The utility model is of small size, light weight, firmness, legerity, convenient installation and disassembling, high detecting sensitivity. The design of the antenna wave director, the Hertz antenna, the reflector and the set body solves the problem of easily snapping caused by collision when running, and has the functions of water proofing, prolonging the service life and so on.
Description
Technical field:
The utility model relates to a kind of scientific and technological athletic sports appliance, the direction-finder set that specifically a kind of radio direction finding (RDF) is used.
Background technology:
Radio direction finding (RDF) is one of athletics sports project, also is the main contents of ham radio activity.It is seek can emitting radio wave small-sized signal source be target, be modern radio communication science and technology and the combining of sports.Roughly process is: in graceful physical environment such as the jungle of wilderness, massif or the suburbs, park, hide good several signal sources in advance, regularly send the telegraphic signal of regulation.Participator's held radio direction-finder set is measured the place direction in hidden radio station, adopts mode on foot, and the certain distance of running is sought out these signal sources rapidly, exactly one by one.With at the appointed time, look for full appointment platform number, the few person of utility time for winning.In this motion, finding signal source exactly is key point, and the utensil of searching signal source is exactly a direction-finder set, so the attributes such as ability in the precision of direction-finder set, weight and adaptation field are most important to direction-finder set.Early stage channels watcher applying electronic pipe manufacturer, the volume heaviness is used very inconveniently, excessively arrives transistor afterwards, and is still heavy although volume reduces to some extent, poor sensitivity; Though and some professional direction-finder set frequency bands are very wide, as notification number is that the Chinese patent of CN2816831 discloses a kind of " hand-held radio direction-finding device ", possess wide, the direction finder sensitivity advantages of higher of direction finding frequency range, but involve great expense, be unfavorable in teenager's motion, promoting.
Summary of the invention:
Technical problem to be solved in the utility model just provides a kind of 144MHz wave band channels watcher, and this direction-finder set has that volume is little, in light weight, easy accessibility, highly sensitive, low price, be easy to characteristics such as popularization in the radio direction finding (RDF) campaign.
Technical solution adopted in the utility model is:
A kind of 144MHz wave band channels watcher, comprise sender, Hertz antenna and reverberator, it is characterized in that: sender is connected guides on the bar, guide bar into and be fixed on the casing top, have circuit storehouse, power storehouse and dovetail on the casing, the head end of casing is connected with Hertz antenna, dovetail connects reverberator, circuit has receiving circuit in the storehouse, also have the frequency adjustment knob, volume adjustment knob and the earphone jack that are connected with receiving circuit on the casing, be provided with dismountable power supply in the power storehouse, activity is plugged with earphone in the earphone jack.
Described sender, Hertz antenna and reverberator mainly are made of the mild steel band that an end has a spiral hoop of internal thread, and the outside of mild steel band also has water barrier.
Described sender connects by the director joint pin guides on the bar, and the director joint pin is fixed in by screw and guides on the bar, and sender is connected on the director joint pin by the spiral hoop screw-casing.
The described bar of guiding into is connected with casing with flange nut by the ring flange with automatic fastening function, and ring flange is fixed in the casing top by screw, guides bar into and is plugged in the ring flange, and flange nut is socketed in guides on the bar and screw-casing is connected on the ring flange upper end.
The head end of described casing has the oscillator joint pin, and the oscillator joint pin is connected to Hertz antenna by the spiral hoop thread bush, and Hertz antenna also is connected with receiving circuit.
Also have regularly reminder settings button and far away, proximity switch on the described casing, regularly the reminder settings button is connected with receiving circuit with far away, proximity switch.
Described casing adopts aluminum alloy materials to make, and has the casing backing plate in the casing, is beneficial to casing and shell snapping, and the design screw is connected with the shell screw.
Described dovetail has the reverberator joint pin, and the reverberator joint pin is connected to upper reflector by the spiral hoop thread bush.
Described receiving circuit comprises High Amplifier Circuit, mixting circuit and intermediate level circuit, and the transistor VT3 of the transistor VT1 in the High Amplifier Circuit, the transistor VT2 of mixting circuit and intermediate level circuit is N channel enhancement metal-oxide-semiconductor.
Described receiving circuit also comprises filtering circuit, has quartz-crystal filter JTLF in the filtering circuit.
The beneficial effect that the utility model can reach is:
1, the utility model places receiving circuit in the casing that aluminum alloy materials makes, and sender, Hertz antenna, reverberator and guide bar, casing into and flexibly connect, make full machine become as a whole, have advantages such as volume is little, in light weight, firm, light and handy, easy accessibility.
2, the utility model adopts metal-oxide-semiconductor to replace transistor, quartz filter to replace the conventional ceramic wave filter, has effectively filtered undesired signal, and the signal amplifying function of useful signal is significantly improved, and detection sensitivity greatly increases.
3, sender of the present utility model, Hertz antenna and reverberator mainly are made of the mild steel band, the outside of mild steel band also has water barrier, the extension that has solved first when running in the dense woods bumps the frangibility problem, has second reached effects such as waterproof, long service life.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the logic block-diagram of receiving circuit.
Fig. 3 is the circuit theory diagrams of receiving circuit.
Embodiment:
The utility model will be further described below in conjunction with accompanying drawing:
As Fig. 1, Fig. 2, shown in Figure 3: the 144MHz wave band channels watcher of the VHF frequency range that this radio direction finding (RDF) training and contest are used, comprise sender 1, Hertz antenna 7 and reverberator 23, sender 1, Hertz antenna 7 and reverberator 23 mainly are made of the mild steel band 3 that is connected with the spiral hoop with internal thread, the outside of mild steel band 3 also has the water barrier that the PVC heat-shrink tube is made, the extension that has solved so first when running in the dense woods bumps the frangibility problem, has second reached effects such as waterproof, elasticity are strong, long service life; Wherein sender 1 is guided on the bar 4 by 2 connections of director joint pin, and director joint pin 2 is fixed in by screw and guides on the bar 4, and sender 1 is connected on the director joint pin 2 by the spiral hoop screw-casing; Guiding bar 4 into adopts in light weight and aluminium-alloy pipe that intensity is high makes, guiding bar 4 into is connected on the casing 17 by ring flange 6 and flange nut 5, ring flange 6 is fixed in casing 17 tops by screw, guide bar 4 into and be plugged in the ring flange 6, flange nut 5 is socketed in guides on the bar 4 and screw-casing is connected on ring flange 6 upper ends; Has circuit storehouse 14 on the casing 17, power storehouse 18 and dovetail 21, the head end of casing 17 has oscillator joint pin 8, oscillator joint pin 8 is connected to Hertz antenna 7 by the spiral hoop thread bush, Hertz antenna 7 also is connected with receiving circuit 16, the tail end of casing 17 has dovetail 21, dovetail 21 has reverberator joint pin 19, reverberator joint pin 19 is connected to upper reflector 23 by the spiral hoop thread bush, has receiving circuit 16 in the circuit storehouse 14, also has the frequency adjustment knob 11 that is connected with receiving circuit 16 on the casing 17, volume adjustment knob 13, earphone jack 20, regularly reminder settings button 10 is with far away, proximity switch 15, be provided with four joint dry cells in the power storehouse 18, the head end of power storehouse 18 also is connected with power switch 22, activity is plugged with earphone 24 in the earphone jack 20, in order to make fuselage reach waterproof, shockproof, high reliability such as anticollision and be convenient to dismounting, requirement easy to maintenance, casing 17 adopts aluminum alloy materials to make, has casing backing plate 9 in the casing 17, be beneficial to casing 17 and shell 12 snappings, and design has screw to be connected with the shell screw, and can like according to people, casing 17 is sprayed into shades of colour with shell 12.Receiving circuit 16 is improved on the basis of common superheterodyne circuit, improved place has: the front end of receiving circuit 16 uses single magnetic ring coil balance adaptation, finish sender 1, Hertz antenna 7, the impedance matching of reverberator 23 and input circuit, transistor VT1 in the High Amplifier Circuit, the transistor VT2 of mixting circuit and the transistor VT3 of intermediate level circuit adopt N channel enhancement metal-oxide-semiconductor, because this metal-oxide-semiconductor has input, the output impedance height, dynamic range is big, noise is low, gain is high, characteristics such as working stability make its enlarging function have increased significantly; Adopt three end quartz-crystal filter JTLF in the filtering circuit, compressed intermediate-frequency bandwidth, reduced and inserted decay, make that the selectivity of this circuit is very good, each transmitting station spacing frequency only is the mixed platform problem that 100KHz caused when having solved contest, regularly reminder settings button 10 is set 60 seconds regularly, reminded once in per 60 seconds, far, proximity switch 15 carries out the former short range control of manual gain, every this programme technical indicator is good and multiple functional, be not only applicable to China and in the world on the training and the contest of the radio direction finding (RDF) sports events of carrying out, and be applicable to out-of-home entertainment stress-relieving activity and wild animal of a mass character, national defence, public security, the instrument that radio control department is used for radio monitoring uses.
Claims (10)
1, a kind of 144MHz wave band channels watcher, comprise sender (1), Hertz antenna (7) and reverberator (23), it is characterized in that: sender (1) is connected guides on the bar (4), guide bar (4) into and be fixed on casing (17) top, has circuit storehouse (14) on the casing (17), power storehouse (18) and dovetail (21), the head end of casing (17) is connected with Hertz antenna (7), dovetail (21) connects reverberator (23), has receiving circuit (16) in the circuit storehouse (14), also has the frequency adjustment knob (11) that is connected with receiving circuit (16) on the casing (14), volume adjustment knob (13) and earphone jack (20), power storehouse is provided with detachable power supply in (18), and the interior activity of earphone jack (20) is plugged with earphone (24).
2,144MHz wave band channels watcher as claimed in claim 1, it is characterized in that: sender (1), Hertz antenna (7) and reverberator (23) mainly by an end with have mild steel band (3) formation that the internal thread spiral hoop is connected, the outside of mild steel band (3) also is provided with water barrier.
3,144MHz wave band channels watcher as claimed in claim 1 or 2, it is characterized in that: sender (1) is connected by director joint pin (2) and guides on the bar (4), director joint pin (2) is fixed in guides on the bar (4), and sender (1) is connected on the director joint pin (2) by the spiral hoop screw-casing.
4,144MHz wave band channels watcher as claimed in claim 1, it is characterized in that: guide bar (4) into and be connected on the casing (17) by having the ring flange (6) and the flange nut (5) that tighten function automatically, ring flange (6) is fixed in casing (17) top by screw, guide bar (4) into and be plugged in the ring flange (6), flange nut (5) is socketed in guides that bar (4) is gone up and screw-casing is connected on ring flange (6) upper end into.
5,144MHz wave band channels watcher as claimed in claim 1 or 2, it is characterized in that: the head end of casing (17) has oscillator joint pin (8), oscillator joint pin (8) is connected to Hertz antenna (7) by the spiral hoop thread bush, and Hertz antenna (7) also is connected with receiving circuit (16).
6,144MHz wave band channels watcher as claimed in claim 1, it is characterized in that: also have regularly reminder settings button (10) and far away, proximity switch (15) on the casing (17), regularly reminder settings button (10) is connected with receiving circuit (16) with far away, proximity switch (15).
7,144MHz wave band channels watcher as claimed in claim 1 is characterized in that: casing (17) adopts aluminum alloy materials to make, and has casing backing plate (9) in the casing (17), and casing (17) passes through casing backing plate (9) snapping with shell (12).
8,144MHz wave band channels watcher as claimed in claim 1 or 2, it is characterized in that: dovetail (21) has reverberator joint pin (19), and reverberator joint pin (19) is connected to reverberator (23) by the spiral hoop thread bush.
9,144MHz wave band channels watcher as claimed in claim 1, it is characterized in that: receiving circuit (16) comprises High Amplifier Circuit, mixting circuit and intermediate level circuit, and the transistor (VT2) of the transistor in the High Amplifier Circuit (VT1), mixting circuit and the transistor (VT3) of intermediate level circuit are N channel enhancement metal-oxide-semiconductor.
10, as claim 1 or 9 described 144MHz wave band channels watchers, it is characterized in that: receiving circuit also comprises filtering circuit in (16), has quartz-crystal filter (JTLF) in the filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159200 CN200968988Y (en) | 2006-01-10 | 2006-11-23 | 144MHz wave band radio direction finding machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620029762.5 | 2006-01-10 | ||
| CN200620029762 | 2006-01-10 | ||
| CN 200620159200 CN200968988Y (en) | 2006-01-10 | 2006-11-23 | 144MHz wave band radio direction finding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200968988Y true CN200968988Y (en) | 2007-10-31 |
Family
ID=38968558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620159200 Expired - Fee Related CN200968988Y (en) | 2006-01-10 | 2006-11-23 | 144MHz wave band radio direction finding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200968988Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101012A (en) * | 2015-06-18 | 2015-11-25 | 鲁晓阳 | Short-distance 3.5MHz radio direction finder |
-
2006
- 2006-11-23 CN CN 200620159200 patent/CN200968988Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101012A (en) * | 2015-06-18 | 2015-11-25 | 鲁晓阳 | Short-distance 3.5MHz radio direction finder |
| CN105101012B (en) * | 2015-06-18 | 2018-07-31 | 鲁晓阳 | Short distance 3.5MHz channels watchers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 Termination date: 20091223 |