CN2329121Y - Ground wave broadcast equipment of very-low frequency transistor electronic tube - Google Patents
Ground wave broadcast equipment of very-low frequency transistor electronic tube Download PDFInfo
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- CN2329121Y CN2329121Y CN 98229055 CN98229055U CN2329121Y CN 2329121 Y CN2329121 Y CN 2329121Y CN 98229055 CN98229055 CN 98229055 CN 98229055 U CN98229055 U CN 98229055U CN 2329121 Y CN2329121 Y CN 2329121Y
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Abstract
The utility model relates to a very-low frequency transistor and electronic tube ground wave broadcasting device which comprises a transmitter, a ground coupling transmitting network, and a user receiver. The transmitter is connected with a low pass filter by a frequency synthesizer, the low pass filter and an audio amplifier are together connected with a modulator which is connected with an isolating amplifier, and the isolating amplifier is connected with a carrier wave preamplifier, then a transistor power preamplifier, and finally an electronic tube power amplifier. The utility model has the advantages that broadcasting signal transmission is free from day and night and landforms and of stable and reliable signals, wide transmission covering surface, no need for special posts and wires, etc.
Description
The utility model belongs to the broadcast communication field, is specifically related to a kind of very low frequency transistor electron tube ground wave broadcast equipment.
At present, main wired broadcasting equipment and the wireless frequency modulation broadcasting equipment of adopting of China rural area broadcasting.Wired broadcasting equipment must set up special bar special line, and broadcast singal is delivered to the user.The networking of this wired broadcasting mode expends a large amount of human and material resources, financial resources, builds up the expensive hundreds thousand of units of a villages (towns) radio network, and is subject to natural force and artificial destruction after the networking, and outside line maintenance and repair difficulty is big, and net easily collapses.Wireless frequency modulation broadcasting has the advantage that hack lever line is not saved fund, but the sky wave straight line transmits, and is easily blocked by high mountain gorge, and the blind area is many, and networking coverage rate in rural area is very low in the mountain area; And the modulation frequency resource is very limited, even in the plains region, also must planning use in right amount, can not all build FM broadcasting in each villages (towns) village, otherwise will cause air access channel crowded, serious mutually interference.Carrier signal is drawn from transmitter with the transmission line of two weak points in disclosed patented technology " a kind of method of wired broadcasting and system thereof " (patent No. ZL911041885), wherein draw directly ground connection of back from transmitter for one, after another root is built on stilts earlier again ground connection or directly and " 0 " line in the low-tension network be connected after ground connection again, utilize the earth soil to constitute the transmission loop, because this method utilizes " 0 " in the power line as transmission line, burn user's loudspeaker easily, bring danger also can for simultaneously user's life safety; And because it utilizes the earth soil to constitute the transmission loop, and the carrier signal attenuation losses is very serious, and transmission range is very short, no practical value, still none according to said method implements successful small towns broadcasting networking illustration so far.
The utility model is at the prior art above shortcomings, and purpose is to propagate the very low frequency transistor electron tube ground wave broadcast equipment of broadcast singal in the mode of surface wave for the broadcasting of villages (towns) village provides a kind of 30-300KHz of selecting for use very low frequency frequency range.
The novel purpose of this reality realizes with following technical proposal:
Very low frequency transistor electron tube ground wave broadcast equipment comprises that transmitter, ground connection coupling send network, receiver user and power supply, transmitter is transistor, the hybrid transmitter of electron tube, is made up of frequency synthesizer, low pass filter, audio frequency amplifier, accent spoke degree wave detector, modulator, isolated amplifier, carrier wave preamplifier, transistor power preamplifier, electron tube power amplifier; Its annexation is: frequency synthesizer output connects low pass filter, low pass filter output connects modulator with audio frequency amplifier output, modulator output connects isolated amplifier, the ripple preamplifier is carried in isolated amplifier output, preamplifier output connects transistor power preamplifier, and the output of transistor power preamplifier connects electron tube power amplifier.The ground connection coupling sends network by feed line, safe isolating coupler, transmission antenna, 10KV high-tension electricity transmission line, grounding electrode network I, grounding electrode network II constitute, its annexation is that feed line output connects safe isolating coupler, the output of safe isolating coupler connects grounding electrode network I and transmission antenna, and transmission antenna output connects grounding electrode network II.Receiver user is by high-frequency amplifier circuit, single-chip microcomputer integrated circuit LM2204, automatic switching circuit and loud speaker constitute, and its annexation is that high-frequency amplifier circuit output meets single-chip microcomputer integrated circuit LM2204, and the output of single-chip microcomputer integrated circuit LM2204 power amplifier connects loud speaker.
The frequency synthesizer of transmitter is by nine binary system frequency preset K switch 1, reference source 1024KHz crystal X3, frequency synthesizer integrated circuit MC145106, the voltage-controlled pinane device integrated circuit MD4046 that shakes, resistance R 1-R5, R34, capacitor C 1-C4, C6-C11, C30, C56, C55, three terminal regulator N2, inductance L 2 is formed ... low pass filter is by resistance R 6-R12, R16, capacitor C 48, C52-C54, operational amplifier N1 forms; Audio frequency amplifier is by capacitor C 49-C51, C47, and C44, C43, C16, resistance R 18, R22, R33, R35, operational amplifier N3A, socket X2 forms.The modulation detection is by capacitor C 13-C15, C62, and resistance R 23, potentiometer R36, diode V1, V2, operational amplifier N3B, socket X4 forms; Modulator is by potentiometer R13, R24, and capacitor C 12, C41, C42, C46, C45, C5, inductance L 1 is formed; Isolated amplifier is by capacitor C 17, C18, and resistance R 14, R17, R37, potentiometer R15, operational amplifier N4B forms; The carrier wave preamplifier is by capacitor C 19-C26, C29, and C32, C33, resistance 25-R27, R29, integrated amplifier N6 forms; Electron tube power amplifier is by high-power transmitting tube VE1, jack CK1-CK6, and inductance L 1, transformer T1-T5, capacitor C 1-C32, resistance R 1-R7, R10, R11, R13, R16, rectification full-bridge B1-B5, choking coil ZL1-ZL2, relay J 2 is formed.The automatic switch of receiver is by resistance R 10-R14, potentiometer W2, and triode V59013, operational amplifier N2LM358 forms.Safe isolating coupler in the ground connection coupling transmission network is wound on hollow insulating material or the magnetic material skeleton with insulated conductor and constitutes; Grounding electrode network I is horizontally embedded in underground moist place by naked metal wire, and resistance to earth is less than 4 ohm; Grounding electrode network II, the insulated conductor of having used through water-proofing treatment is netted horizontally embedded in underground damp place, and resistance to earth is worked energetically 500 megohms; Transmission antenna is a plain conductor, and along parallel the setting up of 10KV high-tension electricity transmission line (or low-voltage power line).The reception antenna of receiver user is sagging earthward and can insert in underground moist earth and the water enhancing received signal.
The utility model very low frequency transistor electron tube ground wave broadcast equipment is characterized in that the 30-300KHz very low frequency electromagnetic wave of transmitter output is after transmission antenna and the radiation of grounding electrode network, between the power line network ground surface, with the conversion regime of horizontal magnetic and transverse electric skin mould along the face of land form with surface wave propagate forward, receiver user can be from ground space or the underground carrier signal of obtaining.Therefore the utility model and existing broadcasting equipment relatively have following outstanding advantage:
1. the utility model is selected 30-300KHz very low frequency frequency range for use, mode with surface wave is propagated broadcast singal, avoided crowded interference with the on-air radio electric wave, the broadcast communication frequency resource that exploitation makes new advances, alleviated when the information age, China greatly developed rural broadcast communication the situation of aerial wave frequency resource anxiety.
2. the utility model is built villages (towns) village radio network, does not need vertical rod to establish line, and no outside line maintenance maintenance is saved a large amount of human and material resources, financial resources, compares with wired broadcasting and saves the networking expense more than 85%.Small investment, effective, for economics of underdevelopment always, less, the development of border district district rural area broadcasting industry, opened up a practicable new road.
3. very low frequency carrier transmission broadcast communication signal of the present utility model is not influenced by the upset of layer height variation round the clock, has good time difference stability, and signal stabilization is reliable.
4. the utility model is propagated broadcast singal forward in the surface wave mode, and therefore, it can be crossed over mountain after mountain, and can enter road, hole (tunnel), not limited to by topography and geomorphology, not intercepted by high mountain gorge, and non-blind area is suitable for the foundation of villages (towns), mountain area radio network especially.
5. the utility model equipment performance is stable, and is safe and reliable, can be struck by lightning, and is not subject to natural force and artificial destruction.
6. the utility model long distance of signal transmission, radius can be at tens of kilometers, and area coverage is big, coverage rate 100g in coverage.
7. compatible strong, can with the compatible networking of existing broadcast communication equipment, can not cause waste.
8. be suitable for wide, except that being suitable for the mountain area broadcast communication especially, also can be widely used in vast universities and colleges in all parts of the country, large-scale building site, under the mine, the foundation of unit broadcast communication nets such as factory, campsite.
9. expanded function is strong.Utilize carrier transmission passage of the present utility model, can develop the earthwave beeper, earthwave Home Telephone and earthwave mobile phone.
10. the Japanese Toshiba of this machine employing produces high power valve 3858 transistors and makes integrated amplifier, and homemade high power valve FU80 is a power amplifier tube, and complete machine structure is simplified, and debugging is convenient, and service behaviour is more reliable and more stable.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is this broadcasting equipment structure block diagram;
Fig. 2-A, 2-B, 2-C are the transmitter circuit figure of this broadcasting equipment;
Fig. 3 is that the coupling of this broadcasting equipment ground connection sends network structure;
Fig. 4 is this broadcasting equipment receiver circuit figure.
Embodiment:
Referring to Fig. 1, very low frequency transistor electron tube ground wave broadcast equipment connects the ground connection coupling by transmitter through feed line and sends network, and the signal of ground connection coupling transmission network sends receiver user in the mode of surface wave, and power supply is given the power supply of transmitter and receiver respectively.
The physical circuit of transmitter is referring to Fig. 2, frequency synthesizer output connects low pass filter, low pass filter output connects modulator with audio frequency amplifier output, modulator output connects isolated amplifier, the ripple preamplifier is carried in isolated amplifier output, preamplifier connects phase corrector, and phase corrector output connects transistor power preamplifier, and the output of transistor power preamplifier connects electron tube power amplifier.Wherein, frequency synthesizer is by nine binary system frequency preset K switch 1, reference source 1024KHz crystal X3, frequency synthesizer integrated circuit MC145106, voltage controlled oscillator integrated circuit MD4046, resistance R 1-R5, R34, capacitor C 1-C4, C6-C11, C30, C56, C55, three terminal regulator N2, inductance L 2 is formed; Reference frequency X3 carries out frequency discrimination output error pulse mutually at D2 together with voltage controlled oscillator D1 feedback signal, through loop filter R2, and R3, C11 becomes error voltage, and the frequency of control voltage controlled oscillator makes loop-locking on assigned frequency.Low pass filter is by resistance R 6-R12, R16, and capacitor C 48, C52-C54, operational amplifier N1 forms; Audio frequency amplifier is by capacitor C 49-C51, C47, and C44, C43, C16, resistance R 18, R22, R33, R35, operational amplifier N3A, socket X2 forms.The modulation detection is by capacitor C 13-C15, C62, and resistance R 23, potentiometer 36, utmost point pipe V1, V2, operational amplifier N3B, socket X4 forms.Modulator is by potentiometer R13, R24, and capacitor C 12, C41, C42, C46, C45, C5, inductance L 1 is formed; Isolated amplifier is by capacitor C 17, C18, and resistance R 14, R17, R37, potentiometer R15, operational amplifier N4B forms.The carrier wave preamplifier is by capacitor C 19-C26, C29, and C32, C33, resistance R 25-R27, R29, integrated amplifier N6 forms.Phasing is by potentiometer R28, R30-R32, and capacitor C 27, C28, socket X5 forms.Transistor power preamplifier is by jack CK1-CK6, triode V1-V4, and resistance R 1-R9, coil T1-T2, capacitor C 1-C25, diode D1-D6, potentiometer W1-W3, ammeter M1-M3, axial flow blower F1, rectification full-bridge B1, B2 forms.Electron tube power amplifier is by high-power transmitting tube VE1, jack CK1-CK6, and inductance L 1, transformer T1-T5, capacitor C 1-C32, resistance R 1-R7, R10, R11,13, R16, rectification, rectification full-bridge B1-B5, choking coil ZL1-ZL2, relay J 2 is formed.
The ground connection coupling sends network as shown in Figure 3, and feed line output connects safe isolating coupler, and safe isolating coupler output connects grounding electrode network I and transmission antenna, and transmission antenna output connects grounding electrode network II; Safe isolating coupler is wound on hollow insulating material (or magnetic material) skeleton with insulated conductor and constitutes; The grounding electrode network is horizontally embedded in underground moist place by naked metal wire, and resistance to earth is less than 4 ohm; Grounding electrode network II is used through the insulated conductor of water-proofing treatment netted horizontally embeddedly in underground damp place, and resistance to earth is greater than 500 megohms; Transmission antenna is a plain conductor, and along parallel the setting up of 10KV high-tension electricity transmission line (or low-voltage power line).
The circuit of receiver user as shown in Figure 4, by antenna, High Amplifier Circuit triode J13DJ7H, antenna input coil T1, height are put frequency-selecting master depressor T2, phase shift detection coil T3, capacitor C 1-C18, resistance R 1-R9, integrated circuit V12204, loud speaker S1 form.Ground wave broadcast signal antennas coil T1 from antenna is received amplifies frequency-selecting through height and send integrated circuit to amplify, the phase shift detection, and rectified signal send volume potentiometer W1 to carry out the low frequency power amplification to 8 pin of V1, and low frequency power amplifies output and send loud speaker.The receiver automatic switching circuit is by resistance R 10-R14, potentiometer W2, triode V19013, and operational amplifier N2LM358 forms.Its annexation is that the 16 pin taking-up signal from integrated package V12204 send comparator N2LM358 to judge, the carrier signal input is arranged, open audio switch V5, receiver enters normal radio reception operating state, during the carrier-less signal input, V5 closes automatically, and receiver is in wait state.
The course of work of the utility model very low frequency transistor electron tube ground wave broadcast equipment is: broadcast voice signal send low pass filter through the modulated carrier that audio amplifier circuit amplifies through sending the frequency synthesizer modulator to produce 30-300KHz, send isolated amplifier to amplify after the filtering high order harmonic component and send transistor power preamplifier, preamplifier output is sent into electron tube FU80 and is carried out power amplification, the high-power carrier wave of electron tube F80 output is through output winding, send into safe isolating coupler by feed line, coupler carries out impedance matching, obtain that Best Coupling is sent carrier wave into transmission antenna effectively and by ground electrode network I, II, the very low frequency electromagnetic wave is after transmission antenna and the radiation of grounding electrode network, with the conversion regime of horizontal magnetic and transverse electric mode, the form along the face of land with surface wave is propagated forward.During receiver user work, the terrestrial broadcasting signal of receiving from antenna amplifies and carries out detection by 2204 single-chip microcomputer integrated circuit ULN2204 again after frequency-selecting and high-frequency amplifier circuit amplification, rectified signal carries out audio power amplification output promotion loud speaker by integrated circuit U1 and broadcasts.Automatic switching circuit takes out the AGC signal from integrated circuit U12204 and send amplifier N2LM358 to judge, when signal input N2LM358 is arranged, open audio switch V59013 receiver and enter normal radio reception operating state, audio switch V5 closes during carrier-less signal, and receiver is in the wait noise-limited condition.
Claims (7)
1. very low frequency transistor electron tube ground wave broadcast equipment, comprise transmitter, the ground connection coupling sends network, receiver user and power supply, it is characterized in that transmitter is a transistor, the hybrid transmitter of electron tube, by frequency synthesizer, low pass filter, audio frequency amplifier, transfer spoke degree wave detector, modulator, isolated amplifier, the carrier wave preamplifier, transistor power preamplifier, electron tube power amplifier is formed, its annexation is: frequency synthesizer output connects low pass filter, low pass filter output connects modulator with audio frequency amplifier output, modulator output connects isolated amplifier, the ripple preamplifier is carried in isolated amplifier output, preamplifier output connects transistor power preamplifier, and the output of transistor power preamplifier connects electron tube power amplifier; The ground connection coupling sends network by feed line, safe isolating coupler, transmission antenna, 10KV high-tension electricity transmission line, grounding electrode network I, grounding electrode network II constitute, its annexation is that feed line output connects safe isolating coupler, the output of safe isolating coupler connects grounding electrode network I and transmission antenna, and transmission antenna output connects grounding electrode network II; Receiver user is by high-frequency amplifier circuit, single-chip microcomputer integrated circuit LM2204, automatic switching circuit and loud speaker constitute, its annexation is that high-frequency amplifier circuit output meets single-chip microcomputer integrated circuit LM2204, the output of single-chip microcomputer integrated circuit LM2204 power amplifier connects loud speaker, and automatic switching circuit connects 8 pin and 9 pin of LM2204 integrated circuit.
2. very low frequency transistor electron tube ground wave broadcast equipment according to claim 1, its characteristics are the frequency synthesizer of transmitter by nine binary system frequency preset K switch 1, reference source 1024KHz crystal X3, frequency synthesizer integrated circuit MC145106, voltage controlled oscillator integrated circuit MD4046, resistance R 1-R5, R34, capacitor C 1-C4, C6-C11, C30, C56, C55, three terminal regulator N2, inductance L 2 is formed.
3. very low frequency transistor electron tube ground wave broadcast equipment as claimed in claim 1 or 2 is characterized in that low pass filter by resistance R 6-T12, R16, and capacitor C 48, C52-C54, operational amplifier N1 forms; Audio frequency amplifier is by capacitor C 49-C51, C47, and C44, C43, C16, resistance R 18-R22, R33, R35, operational amplifier N3A, socket X2 forms.The modulation detection is by capacitor C 13-C15, C62, and resistance R 23, potentiometer R36, diode V1, V2, operational amplifier N3B, socket X4 forms; Modulator is by potentiometer R13, R24, and capacitor C 12, C47, C42, C46, C45, C5, inductance L 1 is formed; Isolated amplifier is by capacitor C 17, C18, and resistance R 14, R17, R37, potentiometer R15 operational amplifier N4B forms; The carrier wave preamplifier is by capacitor C 19-C26, C29, and C32, C33, resistance 25-R27, R29, integrated amplifier N6 forms; Transistor power preamplifier is by jack CK1-CK6, triode V1-V4, and resistance R 1-R9, coil T1-T2, capacitor C 1-C25, diode D1-D6, potentiometer W1-W3, ammeter M1-M3, axial flow blower F1, rectification full-bridge B1, B2 forms; Electron tube power amplifier is by high-power transmitting tube VE1, jack CK1-CK2, and inductance L 1, transformer T1-T5, capacitor C 1-C32, resistance R 1-R7, R10, R11, R13, R16, rectification full-bridge B1-B5, choking coil ZL1-ZL2, relay J 2 is formed.
4. very low frequency transistor electron tube ground wave broadcast equipment as claimed in claim 3 is characterized in that the power amplifier preamplifier adopts high power valve 3858 transistors, and power amplifier tube adopts high power valve FU80.
5. very low frequency transistor electron tube ground wave broadcast equipment according to claim 1, the automatic switch that it is characterized in that receiver is by resistance R 10-R14, potentiometer W2, and triode V59013, operational amplifier N2LM358 forms.
6. very low frequency transistor electron tube ground wave broadcast equipment as claimed in claim 1 or 2 is characterized in that the ground connection coupling sends safe isolating coupler in the network and is wound on hollow insulating material or the magnetic material skeleton with insulated conductor and constitutes; Grounding electrode network I is horizontally embedded in underground moist place by naked metal wire, and resistance to earth is less than 4 ohm; Grounding electrode network II, the insulated conductor of having used through water-proofing treatment is netted horizontally embedded in underground damp place, and resistance to earth is greater than 500 megohms; Transmission antenna is a plain conductor, and along parallel the setting up of 10KV high-tension electricity transmission line (or low-voltage power line).
7. as very low frequency transistor electron tube ground wave broadcast equipment as described in the claim 6, it is characterized in that the reception antenna of receiver user is sagging earthward and can insert in underground moist earth and the water, strengthen received signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229055 CN2329121Y (en) | 1998-07-03 | 1998-07-03 | Ground wave broadcast equipment of very-low frequency transistor electronic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229055 CN2329121Y (en) | 1998-07-03 | 1998-07-03 | Ground wave broadcast equipment of very-low frequency transistor electronic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2329121Y true CN2329121Y (en) | 1999-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98229055 Expired - Fee Related CN2329121Y (en) | 1998-07-03 | 1998-07-03 | Ground wave broadcast equipment of very-low frequency transistor electronic tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2329121Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386940A (en) * | 2010-08-30 | 2012-03-21 | 河南中多科技发展有限公司 | D-wave communication rescue system for mine disasters |
-
1998
- 1998-07-03 CN CN 98229055 patent/CN2329121Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386940A (en) * | 2010-08-30 | 2012-03-21 | 河南中多科技发展有限公司 | D-wave communication rescue system for mine disasters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |