CN204518083U - Multitone case fault detection system - Google Patents
Multitone case fault detection system Download PDFInfo
- Publication number
- CN204518083U CN204518083U CN201520132078.9U CN201520132078U CN204518083U CN 204518083 U CN204518083 U CN 204518083U CN 201520132078 U CN201520132078 U CN 201520132078U CN 204518083 U CN204518083 U CN 204518083U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- operational amplifier
- voltage comparator
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 abstract description 4
- 239000012467 final product Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
Multitone case fault detection system of the present utility model, be characterised in that: comprise differential amplifier circuit, second level discharge circuit, voltage comparator and failure alarm circuit, two signal ends of differential amplifier circuit are series in the audio loop of multitone case, after the signal rectification that current rectifying and wave filtering circuit exports second level discharge circuit, filtering, input to the in-phase input end of voltage comparator, the inverting input of voltage comparator is connected on power supply through potentiometer; By the potentiometer on regulation voltage comparator inverting input, failure alarm circuit is not reported to the police just; When there being audio amplifier to break down during open circuit, the differential signal inputed in differential amplifier circuit can be made to reduce, and the output level obtaining voltage comparator occur to overturn and trigger alarm.Native system circuit is simple, with low cost, easy for installation, only needs this device series connection access audio amplifier to get final product work.Can master control room be installed to, also can be installed on each audio amplifier, can detect in real time and whether have audio amplifier to damage.
Description
Technical field
The utility model relates to a kind of multitone case fault detection system, in particular, particularly relates to a kind of certain or some multitone case fault detection system of disconnecting or breaking down of can detecting in real time in numerous audio amplifier.
Background technology
Supermarket, the public places such as sight spot often use wired broadcasting to carry out notifying or publicizing, this type of application is general adopts multiple wired audio amplifier to broadcast on a large scale, audio amplifier quantity has several to tens, the large-scale sight spot audio amplifier quantity had even exceedes up to a hundred, be distributed in hundreds of square metre even thousands of square metres of regions, be difficult to discover if certain audio amplifier breaks down, if the place of inner more noisy and intensive installation audio amplifier in supermarket, because audio amplifier relative distance is nearer, if certain audio amplifier damages, the personnel of needing repairing press close to aerial audio amplifier could find fault, inconvenience is brought to maintenance work.For this reason, those skilled in the art develops multitone case fault detection system, by this device can to real-time detect in numerous audio amplifier certain or some there is fault, alarm signal can be sent to broadcast management centre, also this device quick position fault audio amplifier can be passed through, thus notify that engineering staff rushes to repair in time, ensure that the broadcast of public place can normally run.
Summary of the invention
The utility model, in order to overcome the shortcoming of above-mentioned technical problem, provides a kind of certain or some multitone case fault detection system of disconnecting or breaking down of can detecting in real time in numerous audio amplifier.
Multitone case fault detection system of the present utility model, its special feature is: comprise differential amplifier circuit, second level discharge circuit, voltage comparator and failure alarm circuit, two signal ends of differential amplifier circuit are series in the audio loop of multitone case, and differential amplifier circuit inputs to the input of second level discharge circuit after being amplified by differential signal; The output of second level discharge circuit is provided with current rectifying and wave filtering circuit, after the signal rectification that current rectifying and wave filtering circuit exports second level discharge circuit, filtering, input to the in-phase input end of voltage comparator, the inverting input of voltage comparator is connected on power supply through potentiometer; Failure alarm circuit is connected on the output of voltage comparator;
During use, the signal end of differential amplifier circuit is series at after in audio loop, makes the voltage of voltage comparator inverting input be greater than the voltage of in-phase input end by the resistance of regulator potentiometer, make failure alarm circuit send alarm signal; Then by changing the resistance of potentiometer until failure alarm circuit is not reported to the police just;
When audio loop generation open circuit or when having audio amplifier to disconnect, differential signal to be amplified can be made to reduce, the voltage inputing to voltage comparator in-phase input end also diminishes thereupon, the voltage of in-phase input end is made to be less than the voltage of inverting input, the output state of voltage comparator changes, failure alarm circuit sends alarm signal, has audio amplifier to produce fault to point out staff.
Multitone case fault detection system of the present utility model, described differential amplifier circuit, second level discharge circuit and voltage comparator are made up of the first operational amplifier, the second operational amplifier and the 3rd operational amplifier respectively;
The homophase of the first operational amplifier is connected with R2 through resistance R3, R1 successively with inverting input, be in series with resistance R4 between inverting input and output, the output signal of the first operational amplifier is connected to the in-phase input end of the second operational amplifier after the filter circuit that electric capacity C1 and resistance R6 forms;
The inverting input of the second operational amplifier is connected on positive source through resistance R5, output is connected to the in-phase input end of the 3rd operational amplifier successively through diode D4 and resistance R8, the inverting input of the second operational amplifier is connected to the junction of diode D4 and resistance R8 through resistance R7; The in-phase input end of the 3rd operational amplifier is connected to power supply on the ground through electric capacity C2 and resistance R9;
The anti-phase input of the 3rd operational amplifier is terminated on the armature contact of potentiometer, and potentiometer is being connected to power supply just and between power supply ground, output is connected with failure alarm circuit after connecting with resistance R10.
Multitone case fault detection system of the present utility model, described failure alarm circuit is made up of light-emitting diode D2 and buzzer, the positive pole of diode D2 is connected to power supply on the ground, negative pole is connected with the output of the 3rd operational amplifier through resistance R11, and buzzer is connected to the output of the 3rd operational amplifier after connecting with resistance R12 and diode D3.
Multitone case fault detection system of the present utility model, also comprises the normal condition indicator light be made up of light-emitting diode D1, and the positive pole of light-emitting diode D1, negative pole are connected on the negative pole of light-emitting diode D2, positive pole respectively.
Multitone case fault detection system of the present utility model, the resistance of described resistance R1 is 0.2 ~ 1.0 Ω.
Multitone case fault detection system of the present utility model, described first operational amplifier, the second operational amplifier and the 3rd operational amplifier are made up of 3 discharge circuits in amplifier chip LM348N.
The beneficial effects of the utility model are: multitone case fault detection system of the present utility model, by the resistance R1 of differential amplifier circuit input is series in the audio loop of multitone case, the output signal of differential amplifier circuit is successively after the process of the amplification of second level discharge circuit, current rectifying and wave filtering circuit, input to the positive input of voltage comparator, by the potentiometer on regulation voltage comparator inverting input, failure alarm circuit is not reported to the police just; When there being audio amplifier to break down during open circuit, the differential signal inputed in differential amplifier circuit can be made to reduce, and the output level obtaining voltage comparator occurs to overturn and trigger alarm, solve the problem that in existing many sound box systems, fault is not easily found, beneficial effect is remarkable.
Native system circuit is simple, with low cost, easy for installation, only needs this device series connection access audio amplifier to get final product work.Master control room can be installed to, also can be installed on each audio amplifier, if be installed to master control room, can detect in real time and whether have audio amplifier to damage, if be installed on certain audio amplifier, this audio amplifier can be detected in real time and whether damage, therefore master control room and each audio amplifier can be combined installation, fault is found, by this device localizing faults on single audio amplifier by master control room.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of multitone case fault detection system of the present utility model;
Fig. 2 is the circuit diagram of multitone case fault detection system of the present utility model.
In figure: 1 differential amplifier circuit, 2 second level discharge circuits, 3 current rectifying and wave filtering circuits, 4 voltage comparators, 5 potentiometers, 6 power supplys, 7 normal condition indicator lights, 8 failure alarm circuits, 9 first operational amplifiers, 10 second operational amplifiers, 11 the 3rd operational amplifiers.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, give the schematic diagram of multitone case fault detection system of the present utility model, it comprises differential amplifier circuit 1, second level discharge circuit 2, current rectifying and wave filtering circuit 3, voltage comparator 4, potentiometer 5, normal condition indicator light 7, failure alarm circuit 8; Two signal ends that the IN end of shown differential amplifier circuit 1 and OUT end are differential amplifier circuit 1, two signal ends of differential amplifier circuit 1 are series in the audio loop of multitone case, carry out amplification process the differential signal obtained.Differential amplifier circuit 1 inputs in second level discharge circuit 2 after being amplified by differential signal again and amplifies further.Further amplifying signal inputs in current rectifying and wave filtering circuit 3 by second level discharge circuit 2.
After the signal of current rectifying and wave filtering circuit 3 to input carries out rectification and filtering, be converted into the in-phase input end that direct current signal inputs to voltage comparator 4.Potentiometer 5 is connected with power supply 6 by the inverting input of voltage comparator 4, and failure alarm circuit 8, normal condition indicator light 7 are all connected to the output of voltage comparator 4, the warning under carrying out malfunction respectively and under normal condition.
During use, by the resistance in regulator potentiometer 5 place in circuit, make failure alarm circuit be in alarm condition, now the voltage of voltage comparator in-phase input end is less than the voltage of inverting input, voltage comparator output low level.Then the resistance in potentiometer 5 place in circuit is reduced gradually, when fault alarm 8 stop alarm, the change of stopping potential device 5 resistance immediately, now the voltage of voltage comparator 4 in-phase input end is just greater than the voltage of inverting input, voltage comparator 5 exports high level, fault alarm 8 stop alarm, and normal condition indicator light 7 is lighted.
When there being audio amplifier open circuit in multitone case loop, differential signal to be amplified can be made to reduce, and make the voltage of voltage comparator in-phase input end be less than the voltage of inverting input, the output state of voltage comparator changes, output low level, failure alarm circuit sends alarm signal.
As shown in Figure 2, give the circuit diagram of multitone case fault detection system of the present utility model, shown differential amplifier circuit 1, second level discharge circuit 2, voltage comparator 4 are made up of the first operational amplifier 9, second operational amplifier 10 and the 3rd operational amplifier 11 respectively, current rectifying and wave filtering circuit 3 diode D4 and electric capacity C2 forms, normal condition indicator light 7 is made up of light-emitting diode D1, and failure alarm circuit 8 is made up of light-emitting diode D2 and buzzer Buzzer.
The in-phase input end of the first operational amplifier is connected with one end of resistance R1 through resistance R3, inverting input is connected with the other end of resistance R1 through resistance R2, during use, the two ends of resistance R1 are series in audio signal loop, the electric current of audio signal will produce differential signal by resistance R1, inputs to homophase, the inverting input of the first operational amplifier 9.The output of the first operational amplifier 9 is connected through resistance R4 with its inverting input, and output is connected to the in-phase input end of the second operational amplifier 10 after electric capacity C1, so that the alternating component of the second operational amplifier 10 pairs of differential signals is amplified.The in-phase input end of the second operational amplifier 10 is connected through resistance R6 and power supply, and resistance R5 is just connected with power supply by direction input.The resistance of resistance R1 is chosen between 0.2 ~ 1.0 Ω, is preferably 0.5 Ω.
The output of the second operational amplification circuit 10 is connected with the positive pole of diode D4, and the negative pole of diode D4 is connected with the in-phase input end of the 3rd operational amplifier 11 through resistance R8, and diode D4 realizes the rectified action to output signal.The in-phase input end of the 3rd operational amplifier 11 is also connected through resistance R9 and electric capacity C2 and power supply, and electric capacity C2 realizes the filter action to rectified signal, makes it be converted into the level and smooth direct current signal of waveform, inputs to the in-phase input end of voltage comparator 4.The inverting input of the second operational amplifier 9 is connected to the junction of D4 and R8 through resistance R7.
Potentiometer 5 is connected to power supply just and between power supply ground after connecting with resistance R10, the anti-phase input of the 3rd operational amplifier 11 is terminated on the armature contact of potentiometer 5, access the resistance size between the inverting input of the 3rd operational amplifier and power supply ground by change potentiometer 5, the voltage swing of inverting input can be changed.The positive pole of light-emitting diode D2 is connected with power supply ground, and negative pole is connected with the output of the 3rd operational amplifier 11 through resistance R11, and light-emitting diode D1 is together with D2 reverse parallel connection; Buzzer Buzzer is connected on the output of the 3rd operational amplifier 11 through resistance R12 and diode D3.When the 3rd operational amplifier 11 exports high level (+15V), only diode D1 is lit, and represents the work of multitone case all normal; As output low level (-15V), light-emitting diode D2 is lit, buzzer work, reminds relevant staff to have audio amplifier to there is fault by sound and light alarm signal.
The IN section of differential amplifier circuit 1 and the series connection of OUT end are accessed the audio loop of audio amplifier, ensure that audio amplifier is all intact, resistance between 1,3 ends of increase potentiometer WS-1, when resistance between 1,3 ends increases to certain value, buzzer just can sounding, when now slightly reducing the resistance between 1,3 ends, buzzer just can stop sounding, the current location of potentiometer WS-1 is this device criticality alarm point, if now audio amplifier disconnects, buzzer just can sounding alarm, D2 indicator light is lighted, and indicates this audio amplifier to occur open circuit fault.If master control room adds this device, only need by this device series connection access audio amplifier basic routing line, method of adjustment is similar above-mentioned, if there is certain or some audio amplifier open circuit faults in whole system, just can report to the police.
This principle of device is as follows: after differential amplifier circuit 1 being accessed the audio loop of audio amplifier, if there is no audio amplifier short circuit, R1 just has electric current to be passed through, after amplifier chip LM348N two-stage is amplified, again through rectification and the C2 capacitor filtering of rectifier diode D4, the 5 pin places of LM348N just form a more stable direct voltage, amplifier chip LM348N_3 forms voltage comparator, by the adjustment of potentiometer WS-1, form the 5th pin of LM348N and the voltage compare of the 6th pin, when adjusting the voltage that WS-1 makes the voltage of the 5th pin higher than the 6th pin, 7th pin of LM348N exports as high level, now, D1 lamp is bright, D2 lamp goes out, buzzer is quiet, show normal work.In order to can Normal Alarm, prevent from arranging false alarm or failing to report police, need adjustment potentiometer WS-1 to criticality alarm position, namely the 6th pin voltage of LM348N be just lower than the 5th pin voltage, does not now report to the police; If the audio amplifier generation open circuit of series connection access or damage (burning), input R1 does not just have electric current to flow through, the voltage of the 5th pin of amplifier chip LM348N can drag down instantaneously, lower than the 6th pin voltage, now the 7th pin output low level, D1 lamp goes out, and D2 lamp is bright, buzzer sounding, shows have audio amplifier to break down.Equally, if by this device series connection access radio network basic routing line, because the disconnection of certain or some audio amplifiers can make the electric current flowing through resistance R1 diminish, the 5th pin voltage step-down of LM348N also can be caused, thus the magnitude of voltage of the 6th pin lower than critical condition, enter alarm condition.
Claims (6)
1. a multitone case fault detection system, it is characterized in that: comprise differential amplifier circuit (1), second level discharge circuit (2), voltage comparator (4) and failure alarm circuit (8), two signal ends of differential amplifier circuit are series in the audio loop of multitone case, and differential amplifier circuit inputs to the input of second level discharge circuit after being amplified by differential signal; The output of second level discharge circuit is provided with current rectifying and wave filtering circuit (3), after the signal rectification that current rectifying and wave filtering circuit exports second level discharge circuit, filtering, input to the in-phase input end of voltage comparator, the inverting input of voltage comparator is connected on power supply (6) through potentiometer (5); Failure alarm circuit is connected on the output of voltage comparator;
During use, the signal end of differential amplifier circuit is series at after in audio loop, makes the voltage of voltage comparator inverting input be greater than the voltage of in-phase input end by the resistance of regulator potentiometer, make failure alarm circuit send alarm signal; Then by changing the resistance of potentiometer until failure alarm circuit is not reported to the police just;
When audio loop generation open circuit or when having audio amplifier to disconnect, differential signal to be amplified can be made to reduce, the voltage inputing to voltage comparator in-phase input end also diminishes thereupon, the voltage of in-phase input end is made to be less than the voltage of inverting input, the output state of voltage comparator changes, failure alarm circuit sends alarm signal, has audio amplifier to produce fault to point out staff.
2. multitone case fault detection system according to claim 1, is characterized in that: described differential amplifier circuit (1), second level discharge circuit (2) and voltage comparator (4) are made up of the first operational amplifier (9), the second operational amplifier (10) and the 3rd operational amplifier (11) respectively;
The homophase of the first operational amplifier is connected with R2 through resistance R3, R1 successively with inverting input, be in series with resistance R4 between inverting input and output, the output signal of the first operational amplifier is connected to the in-phase input end of the second operational amplifier after the filter circuit that electric capacity C1 and resistance R6 forms;
The inverting input of the second operational amplifier is connected on positive source through resistance R5, output is connected to the in-phase input end of the 3rd operational amplifier successively through diode D4 and resistance R8, the inverting input of the second operational amplifier is connected to the junction of diode D4 and resistance R8 through resistance R7; The in-phase input end of the 3rd operational amplifier is connected to power supply on the ground through electric capacity C2 and resistance R9;
The anti-phase input of the 3rd operational amplifier is terminated on the armature contact of potentiometer (5), and potentiometer is being connected to power supply just and between power supply ground, output is connected with failure alarm circuit (8) after connecting with resistance R10.
3. multitone case fault detection system according to claim 2, it is characterized in that: described failure alarm circuit (8) is made up of light-emitting diode D2 and buzzer, the positive pole of diode D2 is connected to power supply on the ground, negative pole is connected with the output of the 3rd operational amplifier through resistance R11, and buzzer is connected to the output of the 3rd operational amplifier after connecting with resistance R12 and diode D3.
4. multitone case fault detection system according to claim 3, is characterized in that: also comprise the normal condition indicator light (7) be made up of light-emitting diode D1, and the positive pole of light-emitting diode D1, negative pole are connected on the negative pole of light-emitting diode D2, positive pole respectively.
5. the multitone case fault detection system according to Claims 2 or 3, is characterized in that: the resistance of described resistance R1 is 0.2 ~ 1.0 Ω.
6. the multitone case fault detection system according to Claims 2 or 3, is characterized in that: described first operational amplifier (9), the second operational amplifier (10) and the 3rd operational amplifier (11) are made up of 3 discharge circuits in amplifier chip LM348N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132078.9U CN204518083U (en) | 2015-03-09 | 2015-03-09 | Multitone case fault detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132078.9U CN204518083U (en) | 2015-03-09 | 2015-03-09 | Multitone case fault detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204518083U true CN204518083U (en) | 2015-07-29 |
Family
ID=53716008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520132078.9U Expired - Fee Related CN204518083U (en) | 2015-03-09 | 2015-03-09 | Multitone case fault detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204518083U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104661170A (en) * | 2015-03-09 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Fault detection system for multiple speakers |
| CN108868959A (en) * | 2018-06-20 | 2018-11-23 | 潍柴动力股份有限公司 | A kind of fault detection means of solenoid valve and oil sump for engine |
-
2015
- 2015-03-09 CN CN201520132078.9U patent/CN204518083U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104661170A (en) * | 2015-03-09 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Fault detection system for multiple speakers |
| CN108868959A (en) * | 2018-06-20 | 2018-11-23 | 潍柴动力股份有限公司 | A kind of fault detection means of solenoid valve and oil sump for engine |
| CN108868959B (en) * | 2018-06-20 | 2020-12-22 | 潍柴动力股份有限公司 | Fault detection device of electromagnetic valve and oil pan for engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104661170A (en) | Fault detection system for multiple speakers | |
| CN204518083U (en) | Multitone case fault detection system | |
| CN105445594A (en) | Power grid fault detection system | |
| CN208833832U (en) | Leakage warning monitoring system | |
| CN105762938B (en) | A kind of distributed photovoltaic monitoring system of distribution network and its control method | |
| CN203204114U (en) | Direct current grounding alarm based on current detector with openings | |
| CN203396893U (en) | Power line leakage current detection apparatus | |
| CN205484655U (en) | 485 communication line detector | |
| CN112491007A (en) | Leakage current protection, monitoring and early warning system and method | |
| CN105277903A (en) | Method for performing remote monitoring on UPS | |
| CN104237617A (en) | Electric leakage detection device | |
| CN1880965A (en) | Power transmission line break monitoring and alarming device | |
| CN204335118U (en) | Aviation obstruction beacon supervisory control system | |
| KR101936722B1 (en) | Power line monitoring system for street lights | |
| CN104700541A (en) | Anti-theft device and detection method for street lamp cable | |
| CN204652035U (en) | A kind of Signal Detecting Circuit for Automatic Transfer Switching Equipment | |
| CN202454008U (en) | Sound and light alarm equipment monitoring circuit | |
| CN204154852U (en) | Transmission and distribution network fault location system | |
| CN204791373U (en) | Wireless Intelligence cable anti -theft system | |
| CN204142816U (en) | A kind of voltage fluctuation warning device | |
| CN205595896U (en) | Net monitored control system is joined in marriage to distributing type photovoltaic | |
| CN204695566U (en) | A kind of online Intelligent road signal lamp control system | |
| CN205447997U (en) | Automatic control and remote network monitoring system for centralized heating | |
| CN206321698U (en) | A kind of power supply row cabinet of auto-alarming | |
| CN205720522U (en) | A kind of transmission of electricity line detector |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 |