CN203335133U - Downhole audio broadcasting alarm device - Google Patents
Downhole audio broadcasting alarm device Download PDFInfo
- Publication number
- CN203335133U CN203335133U CN2013204143630U CN201320414363U CN203335133U CN 203335133 U CN203335133 U CN 203335133U CN 2013204143630 U CN2013204143630 U CN 2013204143630U CN 201320414363 U CN201320414363 U CN 201320414363U CN 203335133 U CN203335133 U CN 203335133U
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- China
- Prior art keywords
- audio
- transmitting antenna
- coupling filter
- downhole
- warning device
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Abstract
A downhole audio broadcasting alarm device comprises an audio amplifier as a signal transmitter, a grounding device and an audio receiving device. The output end of the audio amplifier is connected with the input end of a coupling filter, and the output end of the coupling filter is connected with a transmitting antenna. According to the downhole audio broadcasting alarm device, an alarm signal is transmitted through the audio amplifier used for audio signals, a protection line in a downhole power supply system serves as the transmitting antenna, the coupling filter can prevent the audio amplifier from being affected by a grounding current when the power supply system has a fault, the audio receiving device receives the audio alarm signal, and thus a downhole wireless alarm can be given out. The downhole audio broadcasting alarm device has the obvious advantages that the audio signals are adopted to be transmitted by the device, and thus the transmitting equipment can be simple; because the protection line in the downhole power supply system serves as the transmitting antenna, all electrical equipment can be located within the coverage range, and moreover an antenna does not need to be erected; the device is excellent in performance, high in reliability, simple in structure and low in cost.
Description
Technical field
The utility model relates to a kind of wireless alarmer, particularly relates to a kind of down-hole audio broadcasting warning device of realizing.
Background technology
At present, known downhole wireless warning device, shielded by rock, the signal transmission distance that the conditions such as tunnel bending cause is short, signal straightline propagation, signal attenuation acutely reaches antenna size, impact is set etc., all adopt long wave, medium wave, shortwave, the microwave frequency emission, or adopt many antennas, the radiation patterns such as leaky cable, these radiation patterns are subject to geographical position, geological conditions, the impacts such as roadway shape, be difficult to realize accurately and reliably or emission effectively, when mine disaster occurs, the personnel in the pit can not be timely, effectively receive alarm signal, and then cause casualties.
The end of the eighties, China has introduced the wireless leaky feeder communication technology for down-hole, this technology, need to launch modulated high-frequency signal with leaky cable, must lay specially special-purpose leaky cable in down-hole as transmitting antenna, and leaky cable must constantly change lay length with the carrying out of digging, investment is large, and expends a large amount of leaky cable material and artificial.And what relate to due to leaked transmit is high-frequency signal transmission, need special modulating equipment and receiving equipment.
Summary of the invention
In order to solve, prior art wireless alarmer signal transmission distance is short, signal straightline propagation; signal attenuation is violent; multiple transmitting modes all is difficult to realize; and using leaky cable as the transmitting antenna investment greatly; engineering quantity is large, the high deficiency of cost of production; it is transmitting antenna that a kind of protective wire of take underground power supply system is provided, the down-hole audio broadcasting warning device that transmitter is simple, reliability is high, cost of production is low.
Realize that above-mentioned purpose is by the following technical solutions:
A kind of down-hole audio broadcasting warning device, comprise the audio frequency enlarger as signal transmitter, ground device, apparatus for receiving audio, the output of described audio frequency enlarger is connected with the input of coupling filter, and the output of coupling filter is connected with transmitting antenna.
Further, the audio frequency enlarger arranges two lead-out terminals, a lead-out terminal is connected with the input terminal of coupling filter, another lead-out terminal is connected with the lead-out terminal of coupling filter, another input terminal of coupling filter, lead-out terminal are connected in series to respectively in the transmitting antenna loop, and ground device connects and composes loop with transmitting antenna respectively.
Further, described transmitting antenna is the protective wire of underground power supply system.
Further, described coupling filter connects and composes resonance circuit by winding and the Capacitance parallel connection of transformer, and resonant frequency is 50Hz.
Further, the audiorange 100Hz-12kHz of described audio frequency enlarger.
Further, described apparatus for receiving audio adopts earphone.
Further, described earphone and audio signal wireless connections.
Adopt technique scheme; compared with prior art; the utility model adopts audio frequency enlarger emission alarm signal for audio signal; utilize protective wire in underground power supply system as transmitting antenna; the impact of earth current on audio frequency enlarger during coupling filter isolation electric power system fault; apparatus for receiving audio audio reception alarm signal, realize the radio alarming of down-hole.Its significant effect is: this device adopts the audio signal emission, and transmitter is simple; Protective wire in the employing underground power supply system is as transmitting antenna, and coverage can reach every electric fixtures on the one hand, on the other hand without erecting a television antenna.Device performance is good, and reliability is high, simple in structure, and cost is low.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the coupling filter circuit diagram.
In figure, audio frequency enlarger 1, coupling filter 2, ground device 3,6, transmitting antenna 4, apparatus for receiving audio 5.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
The present embodiment is a kind of audio broadcasting of the down-hole for mine warning device, by audio frequency enlarger 1, and coupling filter 2, ground device 3,6, transmitting antenna 4, apparatus for receiving audio 5 forms.Its structure is shown in Fig. 1, and audio frequency enlarger 1 is that common 100W determines the resistive enlarger, and the PA-100U100W level pressure that the present embodiment selects new Shinco Electron Group Co., Ltd to produce hinders enlarger surely, and the audio frequency scope of application of audio frequency enlarger 1 is 100Hz-12kHz.Audio frequency enlarger 1 has two lead-out terminals, and a lead-out terminal is connected with the input terminal a of coupling filter 2, and another lead-out terminal is connected with the lead-out terminal b of coupling filter 2.The effect of audio frequency enlarger 1 is: audio signal is provided.
In Fig. 2, coupling filter 2 is composed in parallel by winding of transformer a and electric capacity b and forms resonance circuit.Consider that Transformer Winding has resistance, reality is R-L C resonance in parallel.Parameter is set to inductance H=0.35H, capacitor C=29 μ F, resistance R=0.1 Ω, resonant frequency
=50Hz, during resonance
, quality factor
=54908.9.When the electric power system fault, on electric power system protective wire 4, power frequency is 50Hz, and coupling filter 2 is 120689.7 Ω to the resistance value of this frequency current, very large, approximate can think open circuit; And for audio signal (audiorange 100Hz-12kHz), because quality factor q is very large, therefore the resistance value for the current signal of this frequency range is very little, realize the effect of coupling filtering, audio signal (audiorange 100Hz-12kHz) can more smooth and easyly be passed through, and the 50Hz AC signal is produced to blocking effect.The effect of coupling filter 2: blocking-up 50Hz exchanges, and audio signal (audiorange 100Hz-12kHz) can more smooth and easyly be passed through, and has the impedance matching effect concurrently simultaneously.
The impedance matching effect of transformer between the Transformer Winding initial line in coupling filter 2, total ground resistance of transmitting antenna 4 (be load resistance, the safety standard regulation is less than or equal to 2 Ω) can be transformed into and determine the numerical value that resistive audio frequency enlarger 1 requires by the no-load voltage ratio of adjusting transformer.
The electric power system ground device adopts multipoint earthing, and for example ground device 3 and ground device 6 and the earth form loop.Ground device 3 one ends connect with the transmitting antenna 4 be connected with coupling filter lead-out terminal d, other end ground connection, ground device 6 one ends connect with the transmitting antenna 4 be connected with coupling filter input terminal c, other end ground connection, and ground device 3 and ground device 6 form path by the earth.Ground device 3 and ground device 6 effects: form loop together with the earth, play the transmitting antenna effect.
Apparatus for receiving audio 5 receives earphone for ordinary audio, the sub-board in east that the present embodiment adopts company of equipment Co., Ltd of Liyang Dongfang Electronics to produce/DX-820 earphone, after being reequiped, be arranged on safety helmet, the power supply of employing mine lamp power, with the audio signal wireless connections, receive audio alarming signal that send by audio frequency enlarger 1, that launched by transmitting antenna 4.Apparatus for receiving audio 5 effects: audio reception warning wire size is also amplified, and produces alarm sound.
operating principle of the present utility model:
The utility model adopts protection (PE) line of underground power supply system as transmitting antenna 4, and protective wire in use must be connected to every consumer, so without considering to change antenna lay length problem.And, according to safety code, protective wire is all-in resistance≤2 Ω over the ground, make the output resistance coupling simple possible of audio frequency enlarger 1.The impact of 50Hz alternating current on audio frequency enlarger 1, adopted coupling filter 2 when eliminating the electric power system fault.
Transmitting antenna 4 is connected on the load (substitute loudspeaker) of the output of audio frequency enlarger as audio frequency enlarger 1 by coupling filter 2.The alarm signal of the output of coupling filter 2 forms electric current by protection (PE) line 4 as the transmitting antenna electric power system; this electric current formed electromagnetic field is to transmitting antenna 4 surrounding space transmitting audio frequency alarm signals; cover each zone of 4 processes of transmitting antenna, the audio alarming signal of described transmitting antenna 4 emissions is realized the radio alarming of down-hole by each apparatus for receiving audio 5 receptions in each zone.
The audio alarming signal that audio frequency enlarger 1 sends is transported on the electric power system protective wire as transmitting antenna 4 by coupling filter 2.The electric power system protective wire is received on the electric installation of each equipment of down-hole, plays the safeguard protection effect, not charged when normal, and earth current (50Hz) is arranged during fault, but voltage-to-ground can not surpass the special lower security voltage of national regulation, must be below 50V.Audio alarm system is not worked at ordinary times, only when mine disaster occurs, just reports to the police, and according to the 100W enlarger, output resistance 8 Ω calculate, and the electric power system protective wire voltage-to-ground that audio signal during warning (audiorange 100Hz-12kHz) causes is 28.3V(to the maximum
), also meet safety standard.
The effect of the utility model coupling filter 2 is:
1. parallel resonance frequency is 50Hz, and when this frequency, coupling filter 2 presents very large impedance, and when electric power system generation leak current fault, the 50Hz alternating current on transmitting antenna 4 can not exert an influence to audio frequency enlarger 1; And be non-resonant for audio alarming signal (100-12kHz), audio alarming signal can arrive transmitting antenna 4 through less impedance.
2. play the impedance matching effect, the load impedance of determining resistive audio frequency enlarger 1 is 8 Ω, and according to the electric power system code requirement, total ground resistance of transmitting antenna 4 is forbidden to be greater than 2 Ω, the impedance matching effect of transformer between the transformer initial line in coupling filter 2, can be transformed into total ground resistance of transmitting antenna 4 (being load resistance) and determine the numerical value that resistive audio frequency enlarger 1 requires by the no-load voltage ratio of adjusting transformer.
Apparatus for receiving audio 5 receives the audio signal that transmitting antenna 4 occurs, by apparatus for receiving audio 5(earphone) sounding realizes that broadcast reports to the police.
Above-described embodiment has only been expressed a kind of embodiment of the present utility model, but can not therefore be interpreted as the restriction to the utility model scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (7)
1. a down-hole audio broadcasting warning device, comprise the audio frequency enlarger as signal transmitter, ground device, apparatus for receiving audio, it is characterized in that, the output of described audio frequency enlarger is connected with the input of coupling filter, and the output of coupling filter is connected with transmitting antenna.
2. audio broadcasting warning device in down-hole according to claim 1, it is characterized in that, the audio frequency enlarger arranges two lead-out terminals, a lead-out terminal is connected with the input terminal of coupling filter, another lead-out terminal is connected with the lead-out terminal of coupling filter, another input terminal of coupling filter, lead-out terminal are connected in series to respectively in the transmitting antenna loop, and ground device connects and composes loop with transmitting antenna respectively.
3. audio broadcasting warning device in down-hole according to claim 1 and 2, is characterized in that, described transmitting antenna is the protective wire of underground power supply system.
4. audio broadcasting warning device in down-hole according to claim 1, is characterized in that, described coupling filter connects and composes resonance circuit by winding and the Capacitance parallel connection of transformer, and resonant frequency is 50Hz.
5. audio broadcasting warning device in down-hole according to claim 1, is characterized in that the audiorange 100Hz-12kHz of described audio frequency enlarger.
6. audio broadcasting warning device in down-hole according to claim 1, is characterized in that, described apparatus for receiving audio adopts earphone.
7. audio broadcasting warning device in down-hole according to claim 6, is characterized in that, described earphone and audio signal wireless connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204143630U CN203335133U (en) | 2013-07-12 | 2013-07-12 | Downhole audio broadcasting alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204143630U CN203335133U (en) | 2013-07-12 | 2013-07-12 | Downhole audio broadcasting alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335133U true CN203335133U (en) | 2013-12-11 |
Family
ID=49703811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204143630U Expired - Fee Related CN203335133U (en) | 2013-07-12 | 2013-07-12 | Downhole audio broadcasting alarm device |
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| Country | Link |
|---|---|
| CN (1) | CN203335133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334793A (en) * | 2013-07-12 | 2013-10-02 | 河北联合大学 | Underground audio broadcasting alarming device |
-
2013
- 2013-07-12 CN CN2013204143630U patent/CN203335133U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334793A (en) * | 2013-07-12 | 2013-10-02 | 河北联合大学 | Underground audio broadcasting alarming device |
| CN103334793B (en) * | 2013-07-12 | 2015-06-10 | 河北联合大学 | Underground audio broadcasting alarming device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20150712 |
|
| EXPY | Termination of patent right or utility model |