CN106162483A - A kind of tank radio set audio accessory detection device - Google Patents
A kind of tank radio set audio accessory detection device Download PDFInfo
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- CN106162483A CN106162483A CN201510106872.0A CN201510106872A CN106162483A CN 106162483 A CN106162483 A CN 106162483A CN 201510106872 A CN201510106872 A CN 201510106872A CN 106162483 A CN106162483 A CN 106162483A
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Abstract
The invention provides a kind of tank radio set audio accessory detection device, export including transmitter input, receiver, send words testing circuit, called testing circuit, send the instruction of words amplitude, voice to produce circuit and power indicating circuit.Sending words testing circuit to receive multiple transmitter input signals, by signal amplification, superposition, a road send words amplitude to indicate, and called testing circuit is sent on another road；Called testing circuit send words testing circuit and voice to produce the audio signal that circuit produces for receiving, and exports by being transferred to the earphone of each receiver after audio amplifier circuit and impedance matching, and power indicating circuit provides the DC voltage needed for detection.Apparatus of the present invention realize tank radio set audio accessory receiver, the detection of transmitter and multiple spot intercommunication detection, mainly solve the problem that the detection of existing dependence manual method is wasted time and energy, reliability is low, be not suitable with battlefield surroundings needs, there is the features such as volume is little, lightweight, easy to carry, simple to operate.
Description
Technical field
The invention belongs to detection technique field, relate to radio station parts detection, particularly relate to a kind of for tank radio set audio accessory
Integrity detection.
Background technology
At present, plate armour, tank vehicle are equipped with radio station, realize the Speech Communication between each occupant by voice frequency terminal adnexa.
Owing to each adnexa uses frequency high, often fall, pull so that the fault rate of these equipment is the highest, has had a strong impact on army
Training and the serviceability rate of equipment.When radio station accessories malfunctions, the method using manual detection, waste time and energy, reliability is low,
It is not suitable with battlefield surroundings needs.In recent years, the radio station model being equipped on plate armour, tank gets more and more, and connects interface and differs,
Bringing the biggest difficulty to maintenance conditions, currently, research worker is more in the research detecting radio station performance, and main research is such as
The performance parameter of what detection radio station internal structure module, and the detection to radio station audio accessory is little, associated has " dress
First vehicle radio station breast pass, working cap intelligent detecting instrument " (patent No.: 201110396983), mainly for armoring vehicle-mounted part electricity
The breast of platform closes, working cap detects, and lacks the detection of the audio accessory to all in-service radio station.It is fast that the present invention develops a kind of energy
The detection equipment of speed detection radio station voice frequency terminal, it is possible to detect all in-service equipment radio station audio accessory, including the electricity of 9 types
Platform audio accessory, this device has the features such as volume is little, lightweight, easy to carry, simple to operate.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of integrity for tank radio set audio accessory and detects, it is possible to be used for
Armoring, TMT-95, TMT-2, TMT-3, TMT-4, TMK-01, TMK-02 type tank working cap of tank unit's equipment
And the radio station audio accessory such as OSOK-2, OSC-3W, TBP0203A type handle type monophone group is used for quickly detecting and safeguards
Instrument.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is:
This device include transmitter input, receiver output, send words testing circuit, power indicating circuit, called testing circuit,
Words amplitude indicating circuit and voice is sent to produce circuit, wherein:
Transmitter inputs, and connects the transmitter of equipment under test, inputs voice signal, the signal transmission feeding words testing circuit of collection；
Receiver exports, and receives the audio signal of called testing circuit defeated from receiver's (earphone or speaker) of equipment under test
Go out；
Send words testing circuit, receive the signal of multiple transmitter input, carry out signal amplification by operational amplifier signal and superpose
Processing, after its signal is conditioned, a road send words radius indicator to show, called testing circuit is sent on another road；
Power indicating circuit, is used for feeding words testing circuit, called testing circuit provides 8.3V power supply (battery power 7.4V),
+ 5V power supply is provided for producing circuit to voice；
Called testing circuit, send words testing circuit and voice to produce the audio signal that circuit produces, through the ditty that gives great volume for receiving
Joint, after forming suitable audio signal by audio amplifier circuit, in order to be suitable for the receiver of different impedance, carries out impedance matching,
It is eventually transferred to the earphone output of each receiver；
Send words amplitude indicating circuit, for indicating transmitter to input the relative amplitude of the audio signal come, identify for testing staff and send
The amplitude size of words input audio signal；
Voice produces circuit, by the voice signal of the voice playback module storage customization of customization, detects required for receiver
Audio signal, after audio amplifier circuit adaptation, is transferred to called testing circuit.
Send words testing circuit, including discharge circuit, Signal averaging and amplifying circuit, amplitude modulate circuit and Audio processing circuit.
The discharge circuit sending words testing circuit uses conventional LM324 (or LM2902N) chip, and it is defeated that this chip can connect 4 roads simultaneously
Entering, the input of this 4 tunnel is amplified and conditioning after Signal averaging and amplifying circuit carry out Signal averaging again, forms mixed audio signal,
One tunnel be sent to amplitude conditioning carry out signal rectification with filtering after, by send words amplitude instruction display telecommunication signal amplitude, testing staff can
Arbitration functions quality.After another road sends the process of called testing circuit to, export from receiver, can hear what transmitter end inputted
Sound, testing staff can determine whether the quality of one of radio station audio accessory transmitter.
Called testing circuit includes volume regulation circuit, audio amplifier circuit and impedance matching circuit.Called testing circuit connects
Sending and receiving words testing circuit and voice produce the audio signal that circuit produces, and through level setting switches, then carry out audio signal amplification electricity
Road processes, and the receiver being suitable for different impedance by impedance matching exports sound.Amplifier circuit for sound frequency signal uses special audio frequency
Processing chip TBA820M, this chip is low-power audio amplifier, is mainly characterized by operating voltage range width (3～16V),
Power consumption is little, and peripheral cell is few；There is stronger Ripple Suppression ability, without intermodulation distortion.
Voice produces circuit and includes voice playback module, press button and voice adapter circuit.Voice produces the voice playback of circuit
Module is the module of customization, is the one section of melody prerecorded, and this module can use speech chip or voice circuit module of electric, this
Invention device uses KD152H voice circuit module of electric, starts voice signal by press button, adjusts through voice adapter circuit
Send called testing circuit after reason to process, finally export from receiver.Testing staff can be attached by this electric circuit inspection radio station audio frequency
The quality of one of part receiver.
Power indicating circuit includes DC-DC module ,+9V power regulator, diode D1 and D2, power supply indicator, lithium
The instruction of battery, low pressure, charging instruction and+5V power regulator.The DC-DC module of power indicating circuit uses 18～36V
Wide input, the DC-DC converter of output+12V, export after+9V power regulator and+5V power regulator voltage stabilizing respectively
+ 9V and+5V voltage are for power supply needed for whole device, and owing to this device provides two kinds of power supply power supply modes, the most external+24V powers
Powering with battery, using external+24V to power is owing in tank, battery feed is output as+24V, as external+24V,
Using concatenation D2 isolation battery supply input, power supply indicator represents that power supply is powered normally；When lithium battery power supply, it is provided that 7.4V
Voltage, uses concatenation D1 isolation external power supply input, and power supply indicator represents that power supply is powered normally, and battery is powered when voltage is low
When 4.5V, low pressure instruction is bright, reminds and needs charging, and has charging instruction instruction.
This device, by selecting suitable components and parts and circuit design, can make circuit normally work under the supply voltage of 4.5～9V.
Apparatus of the present invention provide the benefit that:
1. can detect all in-service equipment radio station audio accessory, include 9 types at present, and when increasing new audio accessory,
Only need to increase interface without amendment internal circuit board, range is wide, it is simple to system expands and upgrading.
2. can detect polytype radio station audio accessory simultaneously, and the intercommunication experiment merit of any two kinds of radio station audio accessories can be realized
Can, user of service is easy to operate, quick.
3. use modularized design, optimize internal circuit configuration, select the components and parts of low-power consumption, reduce system power dissipation, this dress
Put operating current less than 0.1A.
4. less due to the voice signal of this equipment, the interference of power supply be can not ignore, and uses DC-DC power source isolation external power supply
Interference, and use power supply signal filtering, Anti-Jamming Technique etc. to ensure the pure of power supply signal.Use lithium ion battery, and add
Power protection plate ensures the reliable of power supply and continuous capability, and by voltage detection circuit, passes through voltage when voltage is relatively low
Instruction prompting battery charging.System working stability, reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention detects a kind of embodiment of device；
Fig. 2 is that the present invention detects the structural representation sending words testing circuit in device；
Fig. 3 is that the present invention detects the structural representation of called testing circuit in device；
Fig. 4 is that the present invention detects the structural representation of voice generation circuit in device；
Fig. 5 is that the present invention detects the structural representation of power indicating circuit in device.
In figure, 1. transmitter input, 2. receiver's output, 3. send words testing circuit, 4. power indicating circuit, the most called testing circuit,
6. sending words amplitude to indicate, 7. voice produces circuit.
Wherein, 3-1. amplifier, 3-2. Signal averaging and amplification, the conditioning of 3-3. amplitude, 3-4. Audio processing, 4-1.DC-DC module,
4-2.+9V power regulator, 4-3. power supply indicator, 4-4. lithium battery, 4-5. low pressure indicates, and 4-6. charges instruction, 4-7.+5V
Power regulator, 5-1. volume regulates, 5-2. audio amplifier circuit, 5-3. impedance matching, 7-1. voice playback module, 7-2.
Press button, 7-3. audio frequency adapter circuit.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
The present invention detects the structure of a kind of embodiment of device, as it is shown in figure 1, include transmitter input 1, receiver export 2,
Send words testing circuit 3, power indicating circuit 4, called testing circuit 5, send words amplitude indicating circuit 6 and voice to produce circuit 7.
Transmitter input 1, for connecting the transmitter of equipment under test, inputs voice signal, the signal transmission feeding words inspection of collection
Slowdown monitoring circuit 3；
Receiver exports 2, for receiving the audio signal of called testing circuit 5 and from the receiver of equipment under test (earphone or raise
Sound device) output；
Send words testing circuit 3, receive the signal of multiple transmitter input, carry out signal by operational amplifier signal and amplify with folded
Adding process, after its signal is conditioned, a road send words radius indicator 6 to show, called testing circuit 5 is sent on another road；
Power indicating circuit 4, the instruction of DC-DC converter, power regulator, lithium battery module and power supply, low pressure indicate,
Charging indications etc. form, and are used for feeding words testing circuit 3, called testing circuit 5 provides 8.3V power supply (battery is powered
7.4V), for providing+5V power supply to voice generation circuit 7；
Called testing circuit 5, send words testing circuit 3 and voice to produce the audio signal that circuit 7 produces, through volume for receiving
Size adjustment, after forming suitable audio signal by audio amplifier circuit, in order to be suitable for the receiver of different impedance, hinders
Anti-coupling, is eventually transferred to the earphone output of each receiver 2；
Send words amplitude indicating circuit 6, connect and send words testing circuit 3, for indicating transmitter to input the relative width of the audio signal come
Degree, identifies the amplitude size sending words input audio signal for testing staff；
Voice produces circuit 7, by the voice signal of the voice playback module storage customization of customization, detects required for receiver
Audio signal, after audio amplifier circuit adaptation, be transferred to called testing circuit 5.
Various working caps and handle type monophone group in tank radio set audio accessory have a transmitter, are for inputting words
The equipment of tone signal, has a receiver, is the equipment for receiving voice signal.The audio accessory of tank radio set has
TMT-95, TMT-2, TMT-3, TMT-4, TMK-01, TMK-02 type tank working cap and OSOK-2, OSC-3W,
9 types such as TBP0203A type handle type monophone group, according to the difference of the impedance of input and output, be divided into four groups: OSC-3W,
OSOK-2, TBP0203A interface is one group: >=350mV/600 Ω；TMT-2 interface is one group: >=400mV/600 Ω；TMK-01、
TMK-02, TMK-4 interface is one group: >=70mV/10K Ω；TMT95, TMT-3 interface is one group: >=400mV/600 Ω.
Therefore, the input of words testing circuit is sent to have four tunnels during design, output Ye You tetra-tunnel of called testing circuit.
The present invention detects and send the structure of words testing circuit 3 as in figure 2 it is shown, include discharge circuit 3-1, Signal averaging and put in device
Big circuit 3-2, amplitude modulate circuit 3-3 and Audio processing circuit 3-4.
The discharge circuit 3-1 sending words testing circuit uses conventional LM324 (or LM2902N) chip, and this chip can connect simultaneously
4 tunnel inputs, the input of this 4 tunnel is amplified and conditioning after Signal averaging carries out Signal averaging with amplifying circuit 3-2 again, forms mixing sound
Frequently signal, a road be sent to amplitude conditioning 3-3 carry out signal rectification with filtering after, by send words amplitude instruction 6 display telecommunication signal width
Degree, testing staff can determine whether function quality.After another road sends the process of called testing circuit 5 to, export from receiver, audible
To the sound of transmitter end input, testing staff can determine whether the quality of one of radio station audio accessory transmitter.
The present invention detects the structure of called testing circuit 5 in device as it is shown on figure 3, include that volume regulates circuit 5-1, audio frequency
Amplifying circuit 5-2 and impedance matching circuit 5-3.
Called testing circuit 5 receives and send words testing circuit 3 and voice to produce the audio signal that circuit 7 produces, and opens through volume adjusting
Close 5-1, then carry out amplifier circuit for sound frequency signal 5-2 process, be suitable for receiver's output sound of different impedance by impedance matching 5-3
Sound.Amplifier circuit for sound frequency signal 5-2 uses special audio processing chip TBA820M, and this chip is low-power audio amplifier,
Being mainly characterized by operating voltage range width (3～16V), power consumption is little, and peripheral cell is few；There is stronger Ripple Suppression ability,
Without intermodulation distortion.
The present invention detects voice in device and produces the structure of circuit 7 as shown in Figure 4, including voice playback module 7-1, press button
7-2 and voice adapter circuit 7-3.
Voice produces the module that the voice playback module 7-1 of circuit 7 is customization, is the one section of melody prerecorded, and this module can
To use speech chip or voice circuit module of electric, apparatus of the present invention are used KD152H voice circuit module of electric, are opened by button
Close 7-2 and start voice signal, after voice adapter circuit 7-3 nurses one's health, send called testing circuit 5 to process, finally from called
Device exports.Testing staff can be by the quality of one of this electric circuit inspection radio station audio accessory receiver.
The present invention detects the structure of power indicating circuit 4 in device as it is shown in figure 5, include DC-DC module 4-1 ,+9V power supply
Manostat 4-2, diode D1 and D2, power supply indicator 4-3, lithium battery 4-4, low pressure instruction 4-5, charging instruction 4-6 and
+ 5V power regulator 4-7.
DC-DC module 4-1 of power indicating circuit 4 uses 18～36V width inputs, the DC-DC converter of output 12V,
After+9V power regulator 4-2 and+5V power regulator 4-7 voltage stabilizing, output+9V and+5V voltage supply whole device institute respectively
Need power supply.Owing to this device provides two kinds of power supply power supply modes, the most external+24V powers and battery is powered, and uses external+24V
Power supply is owing in tank, battery feed is output as 24V unidirectional current, as external+24V, uses concatenation D2 to isolate battery
Power supply inputs, and power supply indicator 4-3 represents that power supply is powered normally；When lithium battery 4-4 powers, it is provided that 7.4V voltage, use
Concatenation D1 isolation external power supply input, power supply indicator 4-3 represents that power supply is powered normally, and battery is powered when voltage is less than 4.5V
Time, instruction 4-5 is bright for low pressure, reminds and needs charging, and has charging instruction 4-6 instruction.
Using lithium battery power supply to be mainly used in field work or power taking uses time more difficult, lithium battery capacity is big, can work continuously 20 little
More than time.
The present invention detects the work process of device:
1. add electrically
Add and electrically have two kinds: " battery " power supply and " external power supply " are powered.
Battery is powered: assembled battery provides 7.4V supply voltage, if " low pressure " display lamp is bright, should charge in time.
External power supply is powered: power cable one terminates the supply socket of detection device panel, and another terminates direct current 24V power supply
(brown connects positive pole, blue connects negative pole).
2. send words detection
Radio station to be measured audio accessory is connected to transmitter input and receiver's outfan of this detection device, turns on the power, and
And by adjusting the volume adjusting size of called testing circuit, to transmitter speech or air blowing, now send the instruction instruction of words amplitude to send
Words amplitude (0-2) V, and receiver's outfan can hear from audition.
The most called detection
Radio station to be measured audio accessory is connected to transmitter input and receiver's outfan of this detection device, turns on the power, open
Dynamic voice produces the press button of circuit, and by adjusting the volume adjusting size of called testing circuit, receiver can hear clearly
Clear army song music sound, melody sound size is adjustable.
4. intercommunication test
Any two kinds of radio station audio accessories are plugged on transmitter input and receiver's outfan of this detection device, turn on the power,
And by adjusting the volume adjusting size of called testing circuit, can carry out giving, called intercommunication testing inspection.
5. charging modes
The battery of this detection device uses the lithium battery of direct current 7.4V, 2600mAh, need to charge the battery when using first, when
" low pressure " lamp need to charge the battery time bright in time, 2 hours charging intervals.This detection device provide charge power supply, display lamp by
Red turn green expression battery and have been filled with.
Claims (5)
1. a tank radio set audio accessory detection device, it is characterised in that this device includes that transmitter inputs (1), receiver
Output (2), send words testing circuit (3), power indicating circuit (4), called testing circuit (5), send words amplitude indicating circuit
(6) and voice produce circuit (7), wherein,
Transmitter input (1), connects the transmitter of equipment under test, inputs voice signal, the signal transmission feeding words detection of collection
Circuit (3)；
Receiver exports (2), receives the audio signal of called testing circuit (5) and from the receiver of equipment under test (earphone or raise
Sound device) output；
Send words testing circuit (3), receive multiple transmitter input (1) signal, by operational amplifier carry out signal amplify with
Overlap-add procedure, after its signal is conditioned, words radius indicator (6) display is sent on a road, and called testing circuit (5) is sent on another road；
Power circuit (4), is used for feeding words testing circuit (3), the power supply (battery of called testing circuit (5) offer 8.3V
Power supply 7.4V), provide+5V power supply for producing circuit (7) to voice；
Called testing circuit (5), send words testing circuit (3) and voice to produce the audio signal that circuit (7) produces for reception,
Regulate through volume, after forming suitable audio signal by audio amplifier circuit, in order to be suitable for the receiver of different impedance,
Carry out impedance matching, be eventually transferred to each receiver output (2) output；
Send words amplitude indicating circuit (6), connect and send words testing circuit (3), for indicating transmitter to input next audio signal
Relative amplitude；
Voice produces circuit (7), by the voice signal of the voice playback module storage customization of customization, detects institute for receiver
The audio signal needed, after audio amplifier circuit adaptation, is transferred to called testing circuit (5).
2. according to the detection device described in claim 1, it is characterised in that described words testing circuit (3) of sending include amplifier
Circuit (3-1), Signal averaging and amplifying circuit (3-2), amplitude modulate circuit (3-3) and Audio processing circuit (3-4), send
The discharge circuit (3-1) of words testing circuit uses conventional LM324 (or LM2902N) chip, and this chip can connect 4 simultaneously
Road inputs, and the input of this 4 tunnel is amplified and conditioning after Signal averaging and amplifying circuit (3-2) carry out Signal averaging again, forms mixing
Audio signal, a road be sent to amplitude conditioning (3-3) carry out signal rectification with filtering after, by send words amplitude instruction (6) display give
Words signal amplitude, another road sends called testing circuit (5) to.
3. according to the detection device described in claim 1, it is characterised in that described called testing circuit (5) includes volume
Size adjustment circuit (5-1), audio amplifier circuit (5-2) and impedance matching circuit (5-3)；Called testing circuit (5) receives
Send words testing circuit (3) and voice to produce the audio signal that circuit (7) produces, through level setting switches (5-1), then carry out
Amplifier circuit for sound frequency signal (5-2) processes, and the receiver being suitable for different impedance by impedance matching (5-3) exports sound, sound
Frequently signal amplification circuit (5-2) uses special audio processing chip TBA820M.
4. according to the detection device described in claim 1, it is characterised in that described voice produces circuit (7) and includes voice
Playback module (7-1), press button (7-2) and voice adapter circuit (7-3)；Voice produces the voice playback mould of circuit (7)
Block (7-1) is the module of customization, is the one section of melody prerecorded, and this module can use speech chip or voice circuit module of electric,
Apparatus of the present invention use KD152H voice circuit module of electric, start voice signal by press button (7-2), fit through voice
Send called testing circuit (5) to after the conditioning of distribution road (7-3) to process, finally export from receiver.
5. according to the detection device described in claim 1, it is characterised in that described power indicating circuit (4) includes DC-DC
Module (4-1) ,+9V power regulator (4-2), diode D1 and D2, power supply indicator (4-3), lithium battery (4-4),
Low pressure instruction (4-5), charging instruction (4-6) and+5V power regulator (4-7)；The DC-DC of power indicating circuit (4)
Module (4-1) uses 18～36V width inputs, the DC-DC converter of output+12V, through+9V power regulator (4-2)
With after+5V power regulator (4-7) voltage stabilizing respectively output+9V and+5V voltage for power supply needed for whole device；As external+24V
Time, concatenation D2 isolation battery supply input, power supply indicator (4-3) represents that power supply is powered normally；When lithium battery (4-4) supplies
During electricity, it is provided that 7.4V voltage, concatenation D1 isolation external power supply input, power supply indicator (4-3) represents that power supply is powered normally,
Battery is powered when voltage is less than 4.5V, and low pressure instruction (4-5) is bright, reminds and needs charging, and has charging instruction (4-6) instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106872.0A CN106162483A (en) | 2015-03-12 | 2015-03-12 | A kind of tank radio set audio accessory detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106872.0A CN106162483A (en) | 2015-03-12 | 2015-03-12 | A kind of tank radio set audio accessory detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106162483A true CN106162483A (en) | 2016-11-23 |
Family
ID=58063575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510106872.0A Pending CN106162483A (en) | 2015-03-12 | 2015-03-12 | A kind of tank radio set audio accessory detection device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353512A (en) * | 2000-11-10 | 2002-06-12 | 本田技研工业株式会社 | Message equipment |
| CN2548274Y (en) * | 2002-06-03 | 2003-04-30 | 顾斌杰 | Universal lithium-cell plate built-in miniature charger |
| CN102508106A (en) * | 2011-12-02 | 2012-06-20 | 路长顺 | Intelligent detector of chest protector and working cap of armored vehicle station |
| CN103427923A (en) * | 2013-08-15 | 2013-12-04 | 天津市北海通信技术有限公司 | Control unit of emergency broadcast |
| CN103715748A (en) * | 2012-09-29 | 2014-04-09 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit |
| CN203722285U (en) * | 2013-12-30 | 2014-07-16 | 江苏索尔新能源科技有限公司 | Lithium battery charging circuit |
| CN203761338U (en) * | 2014-03-28 | 2014-08-06 | 温州职业技术学院 | Audio power amplifier |
| CN204482041U (en) * | 2015-03-12 | 2015-07-15 | 中国人民解放军装甲兵工程学院 | A kind of tank radio set audio accessory checkout gear |
-
2015
- 2015-03-12 CN CN201510106872.0A patent/CN106162483A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353512A (en) * | 2000-11-10 | 2002-06-12 | 本田技研工业株式会社 | Message equipment |
| CN2548274Y (en) * | 2002-06-03 | 2003-04-30 | 顾斌杰 | Universal lithium-cell plate built-in miniature charger |
| CN102508106A (en) * | 2011-12-02 | 2012-06-20 | 路长顺 | Intelligent detector of chest protector and working cap of armored vehicle station |
| CN103715748A (en) * | 2012-09-29 | 2014-04-09 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit |
| CN103427923A (en) * | 2013-08-15 | 2013-12-04 | 天津市北海通信技术有限公司 | Control unit of emergency broadcast |
| CN203722285U (en) * | 2013-12-30 | 2014-07-16 | 江苏索尔新能源科技有限公司 | Lithium battery charging circuit |
| CN203761338U (en) * | 2014-03-28 | 2014-08-06 | 温州职业技术学院 | Audio power amplifier |
| CN204482041U (en) * | 2015-03-12 | 2015-07-15 | 中国人民解放军装甲兵工程学院 | A kind of tank radio set audio accessory checkout gear |
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Application publication date: 20161123 |
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