CN107396273A - A kind of detection circuit and its detection method and device for broadcasting audio amplifier - Google Patents
A kind of detection circuit and its detection method and device for broadcasting audio amplifier Download PDFInfo
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- CN107396273A CN107396273A CN201710486997.XA CN201710486997A CN107396273A CN 107396273 A CN107396273 A CN 107396273A CN 201710486997 A CN201710486997 A CN 201710486997A CN 107396273 A CN107396273 A CN 107396273A
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- audio amplifier
- voltage
- circuit
- broadcast audio
- broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
Abstract
A kind of detection circuit for broadcasting audio amplifier, including mu balanced circuit, audio amplifier inspection line sample circuit and control circuit, wherein：The output end of the burning voltage of the mu balanced circuit is connected with the first audio signal input of a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel；The first end of the audio amplifier inspection line sample circuit is connected with the second sound signal input of a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel, and the second end of the audio amplifier inspection line sample circuit is connected with the first signal input pin of the control circuit；The control circuit is used for the sampled voltage gathered according to the signal input pin, compared with predetermined normal voltage, judges broadcast whether audio amplifier short circuit occurs or open circuit is abnormal.The detection circuit structure is simple, and detection is low in energy consumption, and can timely and effectively find failure.
Description
Technical field
The invention belongs to fire broadcast field, more particularly to a kind of detection circuit of the broadcast audio amplifier of fire-fighting and its detection
Method and apparatus.
Background technology
When there is fire-fighting accident, in order to help people timely to understand field condition, or administrative staff's evacuation is helped
The crowd at scene dredges information etc., it is necessary to be played by fire broadcast.In order to comprehensively by messages meant, often at the scene
Multiple fire broadcasts are set, and multiple fire broadcasts are connected to audiogenic device by way of in parallel.
Because same audiogenic device connects multiple broadcast audio amplifiers in parallel, in order to ensure multiple broadcast audio amplifier energy in parallel
Enough normal effective operations to broadcast audio amplifier, it is necessary to carry out fault detect.Current detection method generally by switching side
Formula, to multiple broadcast audio amplifiers by way of switching one by one, it whether there is failure to judge to broadcast audio amplifier, needed one by one when judging
Switching, operation is more troublesome, and can not timely find to broadcast the failure of audio amplifier.
The content of the invention
In view of this, the embodiments of the invention provide it is a kind of broadcast audio amplifier detection circuit and its detection method and device,
, it is necessary to switch one by one during solving in the prior art to detect broadcast audio amplifier, operation is more troublesome, and can not send out in time
The problem of now broadcasting the failure of audio amplifier.
The first aspect of the embodiment of the present invention provides a kind of detection circuit for broadcasting audio amplifier, and the detection circuit includes steady
Volt circuit, audio amplifier inspection line sample circuit and control circuit, wherein：
The of the output end of the burning voltage of the mu balanced circuit and a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel
One audio signal input is connected；
The first end of the audio amplifier inspection line sample circuit broadcasts the second of audio amplifier or multiple broadcast audio amplifiers in parallel with one
Audio signal input is connected, and the second end of the audio amplifier inspection line sample circuit is drawn with the first signal input of the control circuit
Pin is connected；
The control circuit is used for the sampled voltage gathered according to the signal input pin, is pressed into predetermined standard electric
Row compares, and judges broadcast whether audio amplifier short circuit occurs or open circuit is abnormal.
With reference in a first aspect, in the first possible implementation of first aspect, the mu balanced circuit includes voltage-stabiliser tube
VZ1, triode T1 and the first current-limiting resistance R1, the triode T1 base stage pass through the first current-limiting resistance R1 and power supply phase
Even, the power supply is connected with the colelctor electrode of the triode T1, the base stage of the triode T1 and the negative pole phase of the voltage-stabiliser tube
Even, the positive pole of the voltage-regulator diode is connected to the ground.
With reference to the possible implementation of the first of first aspect or first aspect, second in first aspect may realization
In mode, the detection circuit of the broadcast audio amplifier also includes voltage stabilizing sample circuit, and the voltage stabilizing sample circuit is used for described steady
The output voltage of volt circuit is sampled, and the sampled signal of the output voltage of the mu balanced circuit is sent to control circuit
Secondary signal input pin, first signal is judged according to the sampled voltage of the secondary signal input pin by control circuit
Whether the signal of input pin is effective.
With reference to second of possible implementation of first aspect, in the third possible implementation of first aspect, institute
Stating voltage stabilizing sample circuit includes the first divider resistance R2 and the second divider resistance R3, the first divider resistance R2 and the second partial pressure
Resistance R3 is connected between the output end of mu balanced circuit and ground by way of series connection, the first divider resistance R2 and second point
Piezoresistance R3 common port is connected with the secondary signal input pin of the control circuit.
With reference in a first aspect, in the 4th kind of possible implementation of first aspect, the detection circuit also includes protection
Circuit, the protection circuit are arranged on output end and a broadcast audio amplifier or the multiple broadcast in parallel of mu balanced circuit burning voltage
Between the first end of audio amplifier, and/or it is arranged between the burning voltage output end of mu balanced circuit and ground, and/or a broadcast sound
Between the second end and ground of case or multiple broadcast audio amplifiers in parallel.
With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect, if
Put between the output end and the first end of a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel of mu balanced circuit burning voltage
Protection circuit is the first protection diode, is arranged on protection circuit between the burning voltage output end of mu balanced circuit and ground as the
Two protection diodes, the protection circuit being arranged between the second end and ground of a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel
For transient state killer tube.
With reference in a first aspect, in the 6th kind of possible implementation of first aspect, the audio amplifier examines line sample circuit bag
The 3rd current-limiting resistance R6 is included, the 3rd current-limiting resistance R6 is arranged on the first signal input pin of control circuit and one is broadcasted
Between the second sound signal input of audio amplifier or multiple broadcast audio amplifiers in parallel.
The second aspect of the embodiment of the present invention provides a kind of detection method for broadcasting audio amplifier, and methods described is based on above-mentioned the
The detection circuit of any one broadcast audio amplifier of one side, the detection method include：
Under predetermined voltage condition, the electric current for flowing through a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel is obtained；
The electric current of acquisition is converted into voltage signal by sample resistance；
By the voltage signal of conversion compared with normal voltage, both difference voltage values are obtained；
Determine whether current broadcast audio amplifier is normal according to the difference voltage value.
With reference to second aspect, in the first possible implementation of second aspect, a broadcast audio amplifier is flowed through in acquisition
Or multiple broadcast audio amplifiers in parallel electric current the step of before, methods described also includes：
Judge whether the magnitude of voltage of the output end of the mu balanced circuit is stablized in default voltage range；
If the voltage value stabilization of the output end of the mu balanced circuit, in default voltage range, acquisition flows through one wide
Broadcast case or multiple electric currents for broadcasting audio amplifier in parallel.
The third aspect of the embodiment of the present invention provides a kind of detection means for broadcasting audio amplifier, and described device includes：
Electric current acquiring unit, under predetermined voltage condition, obtain and flow through a broadcast audio amplifier or multiple in parallel wide
The electric current of broadcast case；
Current Voltage converting unit, for the electric current of acquisition to be converted into voltage signal by sample resistance；
Voltage comparison unit, for the voltage signal of conversion compared with normal voltage, to be obtained to both difference electricity
Pressure value；
Judging unit, for determining whether current broadcast audio amplifier is normal according to the difference voltage value.
Existing beneficial effect is the embodiment of the present invention compared with prior art：There is provided by mu balanced circuit for broadcast audio amplifier
Stable voltage, and electric current of the burning voltage after broadcasting audio amplifier is detected by control circuit, pass through sample resistance
Voltage is converted electrical current into, by the voltage of conversion compared with normal voltage, is so as to automatically judge to broadcast audio amplifier
The no failure for short circuit or open circuit occur, circuit structure is simple, and exporting low pressure by mu balanced circuit is detected, and can reduce inspection
Measurement of power consumes, and can timely and effectively find failure.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the system structure diagram of the detection circuit of broadcast audio amplifier provided in an embodiment of the present invention；
Fig. 2 is the electrical block diagram of the detection circuit of broadcast audio amplifier provided in an embodiment of the present invention；
Fig. 3 is the implementation process figure of the detection method of broadcast audio amplifier provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the detection means of broadcast audio amplifier provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of the detection device of broadcast audio amplifier provided in an embodiment of the present invention.
Embodiment
In describing below, in order to illustrate rather than in order to limit, it is proposed that such as tool of particular system structure, technology etc
Body details, thoroughly to understand the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention can also be realized in the other embodiments of details.In other situations, omit to well-known system, device, electricity
Road and the detailed description of method, in case unnecessary details hinders description of the invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
It is as shown in Figure 1 the electrical block diagram for detecting circuit of broadcast audio amplifier described in the embodiment of the present invention, the inspection
Slowdown monitoring circuit includes mu balanced circuit 101, audio amplifier inspection line sample circuit 102 and control circuit 103, wherein：
The output end of the burning voltage of the mu balanced circuit 101 and a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel
104 the first audio signal input is connected；
The first end of audio amplifier inspection line sample circuit 102 and a broadcast audio amplifier multiple in parallel broadcast the of audio amplifier
Two audio signal inputs are connected, the second end of the audio amplifier inspection line sample circuit 102 and the first letter of the control circuit 103
Number input pin is connected；
The control circuit 103 is used for the sampled voltage gathered according to the signal input pin, with predetermined standard electric
Pressure is compared, and judges broadcast whether audio amplifier short circuit occurs or open circuit is abnormal.
Wherein, the mu balanced circuit 101 is used to provide stable detection voltage for broadcast audio amplifier so that control circuit is in root
According to the electric current flowed through in broadcast audio amplifier, corresponding sampled voltage can be converted to by sample resistance R5, according to the big of sampled voltage
It is small to judge to broadcast whether audio amplifier breaks down.The mu balanced circuit 101 can include it is a variety of, as shown in Figure 2 it is of the invention preferably
One of which mu balanced circuit structure, the mu balanced circuit includes voltage-stabiliser tube VZ1, triode T1 and the first current-limiting resistance R1,
The base stage of the triode T1 is connected by the first current-limiting resistance R1 with power supply, the collection of the power supply and the triode T1
Electrode is connected, and the base stage of the triode T1 is connected with the negative pole of the voltage-stabiliser tube, positive pole and the ground phase of the voltage-regulator diode
Even.
Wherein, the voltage-stabiliser tube VZ1, triode T1 operating voltage and operating current need to match with input voltage, excellent
A kind of embodiment of choosing is input voltage 24V, the triode T1 of selection model MBT5551, the voltage-stabiliser tube of selection
VZ1 model ZMM15, the first current-limiting resistance of selection can be 15K or so current-limiting resistance.When input voltage fluctuates
When, the stable output reference voltage 15V, the triode T1 of voltage-stabiliser tube VZ1 base voltage is locked in 15V, i.e. three poles
The voltage of the emitter stage of pipe is 15-0.7=14.3V, and forms an emitter follower by triode, and electric current is put
Greatly, realize in the stable output voltage of certain fluctuation range, and export the output with larger current.
Certainly, a kind of embodiment optimized as the present invention, between the colelctor electrode and power supply of the triode T1 also
Resistance including the second current-limiting resistance R4, the second current-limiting resistance R4 can select 1K or so, to reduce fluctuation voltage to three
Damage caused by pole pipe is possible.In addition, between the colelctor electrode and emitter stage of the triode T1, can be protected with parallel connection the 3rd
Diode D3, the negative electrode of the 3rd protection diode D3 are connected with the colelctor electrode of the triode T1, the 3rd protection two
Pole pipe D3 anode is connected with the emitter stage of the triode T1, can be effectively protected triode T1.In addition, in the voltage stabilizing
The output end of circuit can also connect filter capacitor C1, and the electric capacity of the filter capacitor can be 1 microfarad, can with it is further proposed that
The stability of output voltage.
As a kind of currently preferred embodiment, as shown in figure 1, the detection circuit of the broadcast audio amplifier is also included surely
Sample circuit 105 is pressed, the voltage stabilizing sample circuit 105 is used to sample the output voltage of the mu balanced circuit 101, and will
The sampled signal of the output voltage of the mu balanced circuit 101 is sent to the secondary signal input pin of control circuit 103, by controlling
Circuit judges whether the signal of the first signal input pin is effective according to the sampled voltage of the secondary signal input pin.
When the voltage stabilizing sample circuit 105 collection voltage stabilization within the specific limits when, then start by control circuit 103 to the sound
The voltage of case inspection line sample circuit is acquired, and by it compared with normal voltage, if difference is more than predetermined threshold value,
It is abnormal then to represent that current broadcast audio amplifier is present, and abnormal species can be judged according to comparative result, such as, work as detection
Voltage when being more than predetermined normal voltage, then be probably that broadcast audio amplifier the failure of path occurs, when the voltage of detection be less than it is pre-
Then be probably to broadcast the failure that open circuit occurs in audio amplifier during fixed normal voltage, and can according to difference value number, determine
The number of the audio amplifier of existing open circuit.Can occur influence to voltage swing during the open circuit fault of N broadcast audio amplifiers with measured in advance
Size, and form corresponding to foundation, so as to the size according to sampled voltage, directly inquiry obtains the wide of open circuit fault occur
The quantity of broadcast case.The type currently to break down can be shown, or may be used also by way of loudspeaker or display panel
With the quantity including failure.
As a kind of embodiment of the invention optional, as shown in Fig. 2 the voltage stabilizing sample circuit 105 can include the
One divider resistance R2 and the second divider resistance R3, the first divider resistance R2 and the second divider resistance R3 are by way of series connection
It is connected between the output end of mu balanced circuit and ground, the first divider resistance R2 and the second divider resistance R3 common port AD-
Power is connected with the secondary signal input pin of the control circuit, and in the embodiment of optimization, the common port can also wrap
Filter capacitor C4 is included, for filtered noise signal.In a kind of optional embodiment, the first divider resistance R2 and voltage stabilizing electricity
The output end on road 101 is connected, and can select the resistance of 150K ohms, and the second divider resistance R3 is connected to the ground, can selected
For the resistance of 20K ohms.By the partial pressure of the first divider resistance and the second divider resistance, when the output voltage of mu balanced circuit is
At 14.7 volts, the size for the voltage that the voltage stabilizing sample circuit is gathered is 14.7*150/ (150+20).When the voltage stabilizing samples
When the voltage stabilization that circuit is gathered is in predetermined scope, then it can begin through audio amplifier inspection line sample circuit 102 and carry out sound
Case inspection line sampling.
In addition, in order to further optimize the detection circuit of broadcast audio amplifier of the present invention, the detection circuit also includes protecting
Protection circuit, the protection circuit are arranged on the output end and a broadcast audio amplifier or multiple in parallel wide of mu balanced circuit burning voltage
Between the first end of case that broadcasts, and/or it is arranged between the burning voltage output end of mu balanced circuit and ground, and/or a broadcast
Between the second end and ground of audio amplifier or multiple broadcast audio amplifiers in parallel.
The specific implementation schematic diagram of broadcast audio amplifier detection circuit of the present invention is illustrated in figure 2, is arranged on mu balanced circuit
Protection circuit between the first end of the output end of burning voltage and a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel is the
One protection diode D1, the protection circuit being arranged between the burning voltage output end of mu balanced circuit and ground are the second two poles of protection
Pipe D2, the protection circuit being arranged between the second end and ground of a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel press down for transient state
Tubulation P1.Wherein, the first protection diode D1 of palm fibre can bear high-power Dynamic Signal, so as to protect triode, reduce three
Pole pipe is by the possibility of sound source signal CK+ reverse breakdowns.When the second protection diode D2 can prevent sound source signal reversal connection
Damage to broadcasting audio amplifier.The transient state killer tube P1 can avoid excessive pressure damages, and will not input CK- to source of sound and limit
Pressure, do not influence to export music tonequality.
In specific embodiment, the audio amplifier inspection line sample circuit is set including sample resistance R5, the sample resistance R5
It is placed between the first signal input pin of control circuit and ground, for inciting somebody to action.In preferred embodiment, the audio amplifier inspection line is adopted
Sample circuit also includes the 3rd current-limiting resistance R6, is arranged on the first signal input pin ADXF and a broadcast audio amplifier of control circuit
Or between the second sound signal input of multiple broadcast audio amplifiers in parallel, the resistance of the 3rd current-limiting resistance R6 can be
510K, so as to protect control circuit, avoid the occurrence of super-high-current and cause control circuit to damage.In the embodiment of optimization,
The audio amplifier inspection line sample circuit can also include filter capacitor C2 and C3, and the noise signal of input control circuit was carried out
Filter.
The control circuit 103 can include single-chip microcomputer and its power supply circuit, burning interface circuit etc., pass through burning interface
It circuit, can be the different detection mode of single-chip microcomputer burning, and the precision of detection can be adjusted, can be with input voltage
Change, the size of the normal voltage compared with detection signal is adjusted accordingly.
The present invention is by exporting stable measurement voltage, so as to be examined using relatively low 14.3V burning voltage
Survey, and traditional inspection line current 5-20 milliamperes, the present invention, which can be reduced to, only needs 20-2000 microamperes, so as to greatly
The power consumption of broadcast audio amplifier detection is reduced, and by the detection mode of automation, while improving the convenience of detection, moreover it is possible to
Enough discovery failures promptly and accurately.
Fig. 3 is the implementation process that control circuit provided in an embodiment of the present invention is detected to broadcast audio amplifier, including：
In step S301, under predetermined voltage condition, acquisition flows through a broadcast audio amplifier or multiple broadcast sounds in parallel
The electric current of case.
Specifically, the predetermined voltage condition, i.e., the voltage exported by mu balanced circuit.Different mu balanced circuits are exported
Magnitude of voltage it is different, also can be different to the current value for flowing through a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel, it is therefore desirable to
According to different voltage conditions, from different determination methods.
In step s 302, the electric current of acquisition is converted into voltage signal by sample resistance.
Wherein, the electric current of acquisition is converted into voltage signal, can be entered by the sample resistance set beyond control circuit
The mode of row partial pressure, voltage signal corresponding to acquisition.It is of course also possible to divided by the bleeder circuit set in control circuit
Pressure, gets corresponding voltage signal.
In step S303, by the voltage signal of conversion compared with normal voltage, both difference voltage values are obtained.
In step s 304, determine whether current broadcast audio amplifier is normal according to the difference voltage value.
The normal voltage can be calculated previously according to the output voltage of mu balanced circuit, the attachment structure of broadcast audio amplifier
Obtain, the electric current of standard can also be obtained by way of measurement, and obtained normal voltage burning is stored.Certainly, also may be used
Corresponding voltage is recorded in the table, so as to according to detection during so that the broadcast audio amplifier of different numbers into open circuit fault occurring
Voltage quickly search broadcast audio amplifier it is whether normal.
In a kind of embodiment of optimization, a broadcast audio amplifier or multiple electric currents for broadcasting audio amplifier in parallel are flowed through obtaining
The step of before, methods described also includes：
Judge whether the magnitude of voltage of the output end of the mu balanced circuit is stablized in default voltage range；
If the voltage value stabilization of the output end of the mu balanced circuit, in default voltage range, acquisition flows through one wide
Broadcast case or multiple electric currents for broadcasting audio amplifier in parallel.
By judging the output voltage of mu balanced circuit, so as to improve to broadcast audio amplifier detection accuracy and
Reliability.
Fig. 4 is a kind of detection means for broadcasting audio amplifier provided in an embodiment of the present invention, and described device includes：
Electric current acquiring unit 401, under predetermined voltage condition, acquisition to flow through a broadcast audio amplifier or multiple in parallel
Broadcast the electric current of audio amplifier.
Current Voltage converting unit 402, for the electric current of acquisition to be converted into voltage signal by sample resistance.
Voltage comparison unit 403, for compared with normal voltage, the voltage signal of conversion to be obtained into both difference
Magnitude of voltage.
Judging unit 404, for determining whether current broadcast audio amplifier is normal according to the difference currents value.
The broadcast audio amplifier detection means, it is corresponding with broadcasting audio amplifier detection method described in Fig. 3.
Fig. 5 is the schematic diagram of the detection device for the broadcast audio amplifier that one embodiment of the invention provides.As shown in figure 5, the implementation
The detection device 5 of the broadcast audio amplifier of example includes：Processor 50, memory 51 and it is stored in the memory 51 and can be in institute
State the computer program 52 run on processor 50, such as the detection program of broadcast audio amplifier.The processor 50 performs the meter
The step in the detection method embodiment of above-mentioned each broadcast audio amplifier, such as the step 101 shown in Fig. 1 are realized during calculation machine program 52
To 104.Or the processor 50 realizes each module in above-mentioned each device embodiment/mono- when performing the computer program 52
The function of member, such as the function of module 401 to 404 shown in Fig. 4.
Exemplary, the computer program 52 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 51, and are performed by the processor 50, to complete the present invention.Described one
Individual or multiple module/units can be the series of computation machine programmed instruction section that can complete specific function, and the instruction segment is used for
Implementation procedure of the computer program 52 in the detection device 5 of the broadcast audio amplifier is described.For example, the computer program
52 can be divided into electric current acquiring unit, electric current comparing unit, judging unit, and each unit concrete function is as follows：
Electric current acquiring unit, under predetermined voltage condition, obtain and flow through a broadcast audio amplifier or multiple in parallel wide
The electric current of broadcast case；
Current Voltage converting unit, for the electric current of acquisition to be converted into voltage signal by sample resistance；
Voltage comparison unit, for the voltage signal of conversion compared with normal voltage, to be obtained to both difference electricity
Pressure value；
Judging unit, for determining whether current broadcast audio amplifier is normal according to the difference currents value.
The detection device 5 of the broadcast audio amplifier can be desktop PC, notebook, palm PC and cloud server
Deng computing device.The detection device of the broadcast audio amplifier may include, but be not limited only to, processor 50, memory 51.This area skill
Art personnel are appreciated that Fig. 5 is only the example for the detection device 5 for broadcasting audio amplifier, do not form and the detection for broadcasting audio amplifier is set
It standby 5 restriction, can include than illustrating more or less parts, either combine some parts or different parts, such as
The detection device of the broadcast audio amplifier can also include input-output equipment, network access equipment, bus etc..
Alleged processor 50 can be CPU (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other PLDs, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor can also be any conventional processor
Deng.
The memory 51 can be the internal storage unit of the detection device 5 of the broadcast audio amplifier, such as broadcast audio amplifier
Detection device 5 hard disk or internal memory.The memory 51 can also be the external storage of the detection device 5 of the broadcast audio amplifier
The plug-in type hard disk being equipped with equipment, such as the detection device 5 of the broadcast audio amplifier, intelligent memory card (Smart Media
Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..Further, it is described to deposit
Reservoir 51 can also both include the internal storage unit of the detection device 5 of the broadcast audio amplifier or including External memory equipment.Institute
Memory 51 is stated for storing other program sums needed for the detection device of the computer program and the broadcast audio amplifier
According to.The memory 51 can be also used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each work(
Can unit, module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device are divided into different functional units or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
To be that unit is individually physically present, can also two or more units it is integrated in a unit, it is above-mentioned integrated
Unit can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.In addition, each function list
Member, the specific name of module are not limited to the protection domain of the application also only to facilitate mutually distinguish.Said system
The specific work process of middle unit, module, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and is not described in detail or remembers in some embodiment
The part of load, it may refer to the associated description of other embodiments.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Member and algorithm steps, it can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, application-specific and design constraint depending on technical scheme.Professional and technical personnel
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, can be with
Realize by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of division of logic function, there can be other dividing mode when actually realizing, such as
Multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be by some interfaces, device
Or INDIRECT COUPLING or the communication connection of unit, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated module/unit realized in the form of SFU software functional unit and as independent production marketing or
In use, it can be stored in a computer read/write memory medium.Based on such understanding, the present invention realizes above-mentioned implementation
All or part of flow in example method, by computer program the hardware of correlation can also be instructed to complete, described meter
Calculation machine program can be stored in a computer-readable recording medium, and the computer program can be achieved when being executed by processor
The step of stating each embodiment of the method..Wherein, the computer program includes computer program code, the computer program
Code can be source code form, object identification code form, executable file or some intermediate forms etc..Computer-readable Jie
Matter can include：Can carry any entity or device of the computer program code, recording medium, USB flash disk, mobile hard disk,
Magnetic disc, CD, computer storage, read-only storage (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It is it should be noted that described
The content that computer-readable medium includes can carry out appropriate increasing according to legislation in jurisdiction and the requirement of patent practice
Subtract, such as in some jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier signal and
Telecommunication signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to foregoing reality
Example is applied the present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each
Technical scheme described in embodiment is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed
Or replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme, all should
Within protection scope of the present invention.
Claims (10)
1. a kind of detection circuit for broadcasting audio amplifier, it is characterised in that the detection circuit includes mu balanced circuit, audio amplifier inspection line sampling
Circuit and control circuit, wherein：
The output end of the burning voltage of the mu balanced circuit and a broadcast audio amplifier or the first sound of multiple broadcast audio amplifiers in parallel
Sound signal input is connected；
The first end of the audio amplifier inspection line sample circuit and a broadcast audio amplifier or multiple second sounds for broadcasting audio amplifier in parallel
Signal input part is connected, the second end of the audio amplifier inspection line sample circuit and the first signal input pin phase of the control circuit
Even；
The control circuit is used for the sampled voltage gathered according to the signal input pin, is compared with predetermined normal voltage
Compared with judging broadcast whether audio amplifier short circuit occurs or open circuit is abnormal.
2. the detection circuit of broadcast audio amplifier according to claim 1, it is characterised in that the mu balanced circuit includes voltage-stabiliser tube
VZ1, triode T1 and the first current-limiting resistance R1, the triode T1 base stage pass through the first current-limiting resistance R1 and power supply phase
Even, the power supply is connected with the colelctor electrode of the triode T1, the base stage of the triode T1 and the negative pole phase of the voltage-stabiliser tube
Even, the positive pole of the voltage-regulator diode is connected to the ground.
3. the detection circuit of broadcast audio amplifier according to claim 1 or 2, it is characterised in that the detection of the broadcast audio amplifier
Circuit also includes voltage stabilizing sample circuit, and the voltage stabilizing sample circuit is used to sample the output voltage of the mu balanced circuit,
And send the sampled signal of the output voltage of the mu balanced circuit to the secondary signal input pin of control circuit, by control electricity
Road judges whether the signal of the first signal input pin is effective according to the sampled voltage of the secondary signal input pin.
4. the detection circuit of broadcast audio amplifier according to claim 3, it is characterised in that the voltage stabilizing sample circuit includes the
One divider resistance R2 and the second divider resistance R3, the first divider resistance R2 and the second divider resistance R3 are by way of series connection
It is connected between the output end of mu balanced circuit and ground, the first divider resistance R2 and the second divider resistance R3 common port and institute
The secondary signal input pin for stating control circuit is connected.
5. the detection circuit of broadcast audio amplifier according to claim 1, it is characterised in that the detection circuit also includes protection
Circuit, the protection circuit are arranged on output end and a broadcast audio amplifier or the multiple broadcast in parallel of mu balanced circuit burning voltage
Between the first end of audio amplifier, and/or it is arranged between the burning voltage output end of mu balanced circuit and ground, and/or a broadcast sound
Between the second end and ground of case or multiple broadcast audio amplifiers in parallel.
6. the detection circuit of broadcast audio amplifier according to claim 5, it is characterised in that be arranged on mu balanced circuit burning voltage
Output end and the first end of a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel between protection circuit be the first protection two
Pole pipe, the protection circuit being arranged between the burning voltage output end of mu balanced circuit and ground is the second protection diode, is arranged on
Protection circuit between one broadcast audio amplifier or the second end and ground of multiple broadcast audio amplifiers in parallel is transient state killer tube.
7. the detection circuit of broadcast audio amplifier according to claim 1, it is characterised in that the audio amplifier examines line sample circuit bag
The 3rd current-limiting resistance R6 is included, the 3rd current-limiting resistance R6 is arranged on the first signal input pin of control circuit and one is broadcasted
Between the second sound signal input of audio amplifier or multiple broadcast audio amplifiers in parallel.
A kind of 8. detection side of the broadcast audio amplifier of the detection circuit based on any one of the claims 1-7 broadcast audio amplifiers
Method, it is characterised in that methods described includes：
Under predetermined voltage condition, the electric current for flowing through a broadcast audio amplifier or multiple broadcast audio amplifiers in parallel is obtained；
The electric current of acquisition is converted into voltage signal by sample resistance；
By the voltage signal of conversion compared with normal voltage, both difference voltage values are obtained；
Determine whether current broadcast audio amplifier is normal according to the difference voltage value.
9. according to claim 8 broadcast audio amplifier detection method, it is characterised in that acquisition flow through one broadcast audio amplifier or
Before the step of electric current of multiple broadcast audio amplifiers in parallel, methods described also includes：
Judge whether the magnitude of voltage of the output end of the mu balanced circuit is stablized in default voltage range；
If the voltage value stabilization of the output end of the mu balanced circuit, in default voltage range, acquisition flows through a broadcast sound
The electric current of case or multiple broadcast audio amplifiers in parallel.
10. a kind of detection means for broadcasting audio amplifier, it is characterised in that described device includes：
Electric current acquiring unit, under predetermined voltage condition, acquisition to flow through a broadcast audio amplifier or multiple broadcast sounds in parallel
The electric current of case；
Current Voltage converting unit, for the electric current of acquisition to be converted into voltage signal by sample resistance；
Voltage comparison unit, for the voltage signal of conversion compared with normal voltage, to be obtained to both difference voltage values；
Judging unit, for determining whether current broadcast audio amplifier is normal according to the difference voltage value.
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| CN201710486997.XA CN107396273B (en) | 2017-06-23 | 2017-06-23 | Detection circuit of broadcast sound box and detection method and device thereof |
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| CN201710486997.XA CN107396273B (en) | 2017-06-23 | 2017-06-23 | Detection circuit of broadcast sound box and detection method and device thereof |
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| CN111343561A (en) * | 2018-12-20 | 2020-06-26 | 乐清市智格电子科技有限公司 | Fault diagnosis method for sound system with display unit |
| CN111556617A (en) * | 2020-05-28 | 2020-08-18 | 海星海事电气集团有限公司 | Bus communication LED control panel with detection function and control system thereof |
| CN112770244A (en) * | 2020-12-22 | 2021-05-07 | 北京城建智控科技有限公司 | Method and device for detecting line fault of loudspeaker and audio playing equipment |
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| US20050058300A1 (en) * | 2003-07-31 | 2005-03-17 | Ryuji Suzuki | Communication apparatus |
| CN2783676Y (en) * | 2005-01-18 | 2006-05-24 | 梁松原 | Online fault detector for louderspeaker of broad casting line |
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| CN107396273B (en) | 2020-07-07 |
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