CN205610749U - Telephone circuit trouble integrated test device - Google Patents
Telephone circuit trouble integrated test device Download PDFInfo
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- CN205610749U CN205610749U CN201620359766.3U CN201620359766U CN205610749U CN 205610749 U CN205610749 U CN 205610749U CN 201620359766 U CN201620359766 U CN 201620359766U CN 205610749 U CN205610749 U CN 205610749U
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Abstract
The utility model discloses a telephone circuit trouble integrated test device, including failure detector circuit, failure detector circuit includes polarity conversion circuit, sampling circuit, operation comparison circuit and state indicating circuit, the polarity conversion circuit has two inputs, and one of them input is connected with phone supply socket's the 4th foot and the 5th foot, and the another one input is connected with phone supply socket's the 7th foot and the 8th foot, the output and the sampling circuit of polarity conversion circuit are connected, sampling circuit exports sample voltage extremely after sampling to phone mains voltage inlet wire operation comparison circuit, operation comparison circuit presses the window decision circuit for two rationing the power supply, judges back output state indicator signal extremely to the sample voltage who receives state indicating circuit. This testing arrangement can be applicable to the detection of digital telephone and analog telephone simultaneously, and detection efficiency is high.
Description
Technical field
This utility model relates to a kind of line fault testing device, specifically, relates to a kind of telephone line comprehensive fault detector.
Background technology
At present, the communications industry mainly has following several telephone terminal type: IP digital telephone set based on SIP, H.323 agreement, that powered by POE and negative 48 volts of programme-controlled exchange analog telephones powered.Existing market does not also have to detect IP digital telephone circuit can detect again analog phone line the most normal integrated telephony live-line fault detectors sale, needs to detect respectively.And the tab terminal of line inspection phone is the most single at present, detection signal process needs frequently to change, and it is not applied for whole phone, has a strong impact on the work efficiency of phone maintenance, the most unspecial line inspection phone to numeral teleset line fault detect.
Being learnt by substantial amounts of working experience, when the phone that 48v power supply is powered normally works, line voltage distribution is 48 57v, and when telephone line fault is for open circuit, line voltage distribution is zero.Being divided into three kinds of situations when telephone line fault is for short circuit: 1. two lines are joined directly together, 2. one of two lines ground connection, 3. between two lines, insulation is inadequate, and resistance is too low.In the case of these three, line voltage distribution is respectively less than 36v.And when being mixed into the electric main of 220v in telephone line, line voltage distribution can be more than 60v.For above most common failure, common detection method is with the test of network tester or to test by root with circuit tester, meets simulation telephone circuit circuit and numeral telephone line also needs frequently to change detection instrument or the line inspection phone joint when detecting simultaneously, and detection efficiency is low.
Summary of the invention
This utility model needs to detect respectively to solve existing digital telephone circuit and analog phone line, and the test uncurrent technical problem of device, it is proposed that a kind of telephone line comprehensive fault detector, can solve the problems referred to above.
In order to solve above-mentioned technical problem, this utility model is achieved by the following technical solutions:
A kind of telephone line comprehensive fault detector, including failure detector circuit, described failure detector circuit includes polarity switching, sample circuit, computing comparison circuit, and condition indication circuit, described polarity switching has two inputs, one of them input is connected with the 4th foot and the 5th foot of telephone power socket, another one input is connected with the 7th foot and the 8th foot of telephone power socket, the outfan of described polarity switching is connected with sample circuit, described sample circuit exports sampled voltage to described computing comparison circuit after sampling telephone power voltage inlet wire, described computing comparison circuit is that dual-electricity-limiting presses window decision circuit, after judging the sampled voltage received, output state indication signal is to described condition indication circuit.
Further, described polarity switching includes being connected, by four diodes, the bridge-type polarity correction circuit formed, and the positive terminal of described bridge-type polarity correction circuit is connected with described sample circuit.
Further, described sample circuit includes being connected in series in the first bleeder circuit between described polarity switching and ground end and the second bleeder circuit, the outfan that high-pressure side is sample circuit of described second bleeder circuit, the sampled signal input of described dual-electricity-limiting pressure window decision circuit is connected with the outfan of described sample circuit.
nullFurther，Described dual-electricity-limiting pressure window decision circuit includes 4 voltage comparators，It is respectively the first voltage comparator、Second voltage comparator、Tertiary voltage comparator、4th voltage comparator，The in-phase input end of described first voltage comparator inputs the first reference voltage，The described inverting input of the first voltage comparator is connected with the outfan of sample circuit，The described in-phase input end of the second voltage comparator is connected with the outfan of sample circuit，The inverting input of described second voltage comparator inputs the second reference voltage，The described in-phase input end of tertiary voltage comparator is connected with the outfan of sample circuit，The inverting input of described tertiary voltage comparator inputs the first reference voltage，The in-phase input end of described 4th voltage comparator inputs the second reference voltage，The inverting input of described 4th voltage comparator is connected with the outfan of sample circuit.
nullFurther，Described condition indication circuit includes normal condition indicating circuit、Under-voltage condition indicating circuit、And overvoltage condition indicating circuit，Described normal condition indicating circuit includes a NPN audion、First light emitting diode，The positive pole of described first light emitting diode is connected with DC source，Negative pole is connected with the colelctor electrode of a described NPN audion，The base stage of a described NPN audion is connected with the outfan of described first voltage comparator and the outfan of the second voltage comparator respectively，The emitter stage of a described NPN audion connects earth terminal，Described overvoltage condition indicating circuit includes the second light emitting diode、2nd NPN audion，The positive pole of described second light emitting diode is connected with DC source，Negative pole is connected with the colelctor electrode of described 2nd NPN audion，The base stage of described 2nd NPN audion is connected with the outfan of described tertiary voltage comparator，The emitter stage of described 2nd NPN audion connects earth terminal，Described under-voltage condition indicating circuit includes the 3rd light emitting diode、3rd NPN audion，The positive pole of described 3rd light emitting diode is connected with DC source，Negative pole is connected with the colelctor electrode of described 3rd NPN audion，The base stage of described 3rd NPN audion is connected with the outfan of described 4th voltage comparator，The emitter stage of described 3rd NPN audion connects earth terminal.
Further, described second light emitting diode is parallel with the first buzzer.
Further, described 3rd light emitting diode is parallel with the second buzzer.
Further, described telephone line comprehensive fault detector also includes telephone line type detecting circuit, described telephone line type detecting circuit includes AND circuit, 4th light emitting diode, and the 4th NPN audion, two inputs of described AND circuit are connected with the 4th foot and the 5th foot of telephone power socket respectively, the positive pole of described 4th light emitting diode is connected with DC source, negative pole is connected with the colelctor electrode of described 4th NPN audion, the described base stage of the 4th NPN audion is connected with the outfan of described AND circuit, the emitter stage of described 4th NPN audion connects earth terminal.
Further, described telephone power socket is RJ45.
Compared with prior art, advantage of the present utility model and good effect be: telephone line comprehensive fault detector of the present utility model, either digital telephone is utilized still to simulate phone, its running voltage is respectively positioned on the principle of same safe operating voltage range, by detecting the magnitude of voltage of telephone power socket, and by arranging dual-electricity-limiting pressure windows detecting decision circuit, the magnitude of voltage of telephone power socket carries out sampling input compare to dual-electricity-limiting pressure windows detecting decision circuit, obtain the voltage status of telephone wire, and then the work condition state of this phone can be obtained, digital telephone and the detection of simulation phone can be simultaneously suitable for, detection efficiency is high.
After reading in conjunction with the accompanying the detailed description of this utility model embodiment, other features of the present utility model and advantage will become clearer from.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of embodiment functional-block diagram of the telephone line comprehensive fault detector that this utility model is proposed；
Fig. 2 is a kind of embodiment circuit theory diagrams of the telephone line comprehensive fault detector that this utility model is proposed；
Fig. 3 be the telephone line comprehensive fault detector that this utility model is proposed a kind of embodiment in the schematic diagram of telephone line type detecting circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment one, the present embodiment proposes a kind of telephone line comprehensive fault detector, as shown in Figure 1, including failure detector circuit, described failure detector circuit includes polarity switching, sample circuit, computing comparison circuit, and condition indication circuit, described polarity switching has two inputs, one of them input is connected with the 4th foot and the 5th foot of telephone power socket, another one input is connected with the 7th foot and the 8th foot of telephone power socket, the outfan of described polarity switching is connected with sample circuit, described sample circuit exports sampled voltage to described computing comparison circuit after sampling telephone power voltage inlet wire, described computing comparison circuit is that dual-electricity-limiting presses window decision circuit, after judging the sampled voltage received, output state indication signal is to described condition indication circuit.The telephone line comprehensive fault detector operation principle of the present embodiment is: when digital telephone is powered by POE mode, and 4,5 feet and 7,8 feet by telephone power socket provide 48V DC voltage to line fed；nullSimulation phone is when comprehensive wiring mode is applied， 1、2 feet or 7、8 feet or 4、5 feet can detect 48V voltage，Telephone line comprehensive fault detector of the present utility model，Either digital telephone is utilized still to simulate phone，Both common feet are 4、5 feet and 7、8 feet，And digital telephone and simulation phone works voltage are respectively positioned on the principle of same safe operating voltage range，Limit safety range in the present embodiment as 36V 57V，By detecting the magnitude of voltage of telephone power socket，And by arranging dual-electricity-limiting pressure windows detecting decision circuit，By telephone power socket 4、5 feet and 7、8 foot magnitudes of voltage，Carry out sampling input to compare to dual-electricity-limiting pressure windows detecting decision circuit，Obtain the voltage status of telephone wire，Two marginal values can obtain three kinds of states，It is respectively less than 36V，For under-voltage condition，It is positioned at 36V 57V interval，For normal condition，It is overvoltage condition more than 57V，And then the work condition state of this phone can be obtained，This test device can be simultaneously suitable for digital telephone and the detection of simulation phone，Detection efficiency is high.
As a preferred embodiment, as indicated with 2, in the present embodiment, polarity switching includes being connected, by four diodes D5, D6, D7, D8, the bridge-type polarity correction circuit formed, and the positive terminal of described bridge-type polarity correction circuit is connected with described sample circuit.When two terminals of input are respectively connected to the voltage signal of different both positive and negative polarity, the tail end output positive voltage of bridge-type polarity correction circuit can be ensured, it is ensured that the positive pole input of late-class circuit signal.
nullDescribed sample circuit includes being connected in series in the first bleeder circuit between described polarity switching and ground end and the second bleeder circuit，As shown in Figure 2，First bleeder circuit includes the first resistance R1 and the second resistance R2 being in series，Second bleeder circuit includes the 14th resistance R14 and the 4th resistance R4 being in series，Wherein the equivalent resistance of the first bleeder circuit is the high input impedance more than 100K Ω (such as 120 K Ω)、High-accuracy voltage proportional sampling circuit，The equivalent resistance of the second bleeder circuit is 10 K Ω，The outfan that high-pressure side is sample circuit of described second bleeder circuit，After the second bleeder circuit sampling，In the case of not affecting the original state of tested circuit，It is 36 57V voltages by input range，It is sampled by the ratio of 1/12，Voltage after sampling is 3V 4.75V，As the two-door limit value comparing voltage in rear class computing comparison circuit，The sampled signal input of described dual-electricity-limiting pressure window decision circuit is connected with the outfan of described sample circuit.
nullAs shown in Figure 2，Described dual-electricity-limiting pressure window decision circuit includes 4 voltage comparators，It is respectively the first voltage comparator U1、Second voltage comparator U2、Tertiary voltage comparator U3、4th voltage comparator U4，The in-phase input end of described first voltage comparator U1 inputs the first reference voltage，Wherein the first reference voltage level is 4.75V，The described inverting input of the first voltage comparator is connected with the outfan of sample circuit，The described in-phase input end of the second voltage comparator is connected with the outfan of sample circuit，The inverting input of described second voltage comparator inputs the second reference voltage，Wherein the second reference voltage level is 3V，The described in-phase input end of tertiary voltage comparator is connected with the outfan of sample circuit，The inverting input of described tertiary voltage comparator inputs the first reference voltage，The in-phase input end of described 4th voltage comparator inputs the second reference voltage，The inverting input of described 4th voltage comparator is connected with the outfan of sample circuit.The operation principle of dual-electricity-limiting pressure window decision circuit is:
1, when sampled voltage Uin is between threshold voltage (3 < Uin < 4.75), corresponding telephone power socket input voltage is 36V 57V, now the first voltage comparator U1 and the second voltage comparator U2 is all output as high level, therefore, condition indication circuit detects the instruction of the most exportable normal condition of this high level.
2, as Uin > 4.75V time, corresponding telephone power socket input voltage exports high level more than 57V, tertiary voltage comparator U3, shows line over-voltage, likely being mixed into alternating current 220V electric current, condition indication circuit detects that this high level i.e. needs to carry out Danger Electric shock risk alarm.
3, as Uin, < during 3v, corresponding telephone power socket input voltage exports high level less than 36v, the 4th voltage comparator U4, shows that line short or open circuit or line insulation are inadequate, and condition indication circuit detects that this high level i.e. needs to carry out under-voltage condition instruction.
nullDescribed condition indication circuit includes normal condition indicating circuit、Under-voltage condition indicating circuit、And overvoltage condition indicating circuit，Described normal condition indicating circuit includes a NPN audion Q1、First light emitting diode D1，The positive pole of described first light emitting diode D1 is connected with DC source Vdd，Negative pole is connected with the colelctor electrode of a described NPN audion Q1，The base stage of a described NPN audion Q1 is connected with the outfan of described first voltage comparator U1 and the outfan of the second voltage comparator U2 respectively，The emitter stage of a described NPN audion Q1 connects earth terminal，When first voltage comparator U1 and the second voltage comparator U2 is all output as high level，Oneth NPN audion Q1 conducting，First light emitting diode D1 lights，Described overvoltage condition indicating circuit includes the second light emitting diode D2、2nd NPN audion Q2，The positive pole of described second light emitting diode D2 is connected with DC source Vdd，Negative pole is connected with the colelctor electrode of described 2nd NPN audion Q2，The base stage of described 2nd NPN audion Q2 is connected with the outfan of described tertiary voltage comparator U3，The emitter stage of described 2nd NPN audion Q2 connects earth terminal，When tertiary voltage comparator U3 exports high level，Show line over-voltage，Now the 2nd NPN audion Q2 conducting，Second light emitting diode D2 lights，Described under-voltage condition indicating circuit includes the 3rd light emitting diode D3、3rd NPN audion Q3，The positive pole of described 3rd light emitting diode D3 is connected with DC source Vdd，Negative pole is connected with the colelctor electrode of described 3rd NPN audion Q3，The described base stage of the 3rd NPN audion Q3 is connected with the outfan of described 4th voltage comparator U4，The emitter stage of described 3rd NPN audion Q3 connects earth terminal,4th voltage comparator U4 exports high level，Show that line short or open circuit or line insulation are inadequate，Now the 3rd NPN audion Q3 conducting，3rd light emitting diode D3 lights.Owing to the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 represent different states respectively when lighting, the light that three light emitting diodes send different colours can be controlled make a distinction, such as, first light emitting diode sends green glow, second light emitting diode sends HONGGUANG, 3rd light emitting diode sends gold-tinted, and three light emitting diode only one of which when a state are lighted, it is impossible to light simultaneously.
Owing to belonging to overvoltage condition when the second light emitting diode D2 lights, there is Danger Electric shock risk, 3rd light emitting diode D3 there may be line short or open circuit when lighting, belong to fault, in the present embodiment, described in decision design, the second light emitting diode D2 is parallel with the first buzzer M1, described 3rd light emitting diode D3 is parallel with the second buzzer M2, carries out auditory tone cues, to cause the attention of maintainer.
Failure detector circuit can only detect the fault of telephone line, can not judge that this phone is belonging to digital telephone and still simulates phone, therefore, in the present embodiment, telephone line comprehensive fault detector also includes telephone line type detecting circuit, as shown in Figure 3, described telephone line type detecting circuit includes AND circuit, 4th light emitting diode D4, and the 4th NPN audion Q4, two inputs of described AND circuit are connected with the 4th foot and the 5th foot of telephone power socket respectively, the positive pole of described 4th light emitting diode D4 is connected with DC source Vdd, negative pole is connected with the colelctor electrode of described 4th NPN audion Q4, the base stage of described 4th NPN audion Q4 is connected with the outfan of described AND circuit, the emitter stage of described 4th NPN audion Q4 connects earth terminal.When digital telephone is powered by POE mode, provide 48V DC voltage to line fed by 4,5 and the 7 of standard RJ45 interface, 8 feet；Simulation phone is when comprehensive wiring mode is applied, only 1,2 feet or 7,8 feet or 4,5 feet can detect 48V voltage, so testing circuit only need to detect 4,7 feet and 5,8 feet have 48v voltage simultaneously, i.e. can determine that it is digital telephone supply line, otherwise it is simulation phone supply line, when digital telephone supply line, 4th, 5 feet all export high level, therefore AND circuit output high level, therefore the 4th NPN audion Q4 conducting, and then the 4th light emitting diode D4 is luminous, otherwise, 4th light emitting diode D4 is the most luminous, is shown to be analog phone line.
Certainly; described above is not to restriction of the present utility model; this utility model is also not limited to the example above, change that those skilled in the art are made in essential scope of the present utility model, retrofits, adds or replaces, and also should belong to protection domain of the present utility model.
Claims (9)
1. a telephone line comprehensive fault detector, it is characterized in that: include failure detector circuit, described failure detector circuit includes polarity switching, sample circuit, computing comparison circuit, and condition indication circuit, described polarity switching has two inputs, one of them input is connected with the 4th foot and the 5th foot of telephone power socket, another one input is connected with the 7th foot and the 8th foot of telephone power socket, the outfan of described polarity switching is connected with sample circuit, described sample circuit exports sampled voltage to described computing comparison circuit after sampling telephone power voltage inlet wire, described computing comparison circuit is that dual-electricity-limiting presses window decision circuit, after judging the sampled voltage received, output state indication signal is to described condition indication circuit.
Telephone line comprehensive fault detector the most according to claim 1, it is characterized in that: described polarity switching includes being connected, by four diodes, the bridge-type polarity correction circuit formed, and the positive terminal of described bridge-type polarity correction circuit is connected with described sample circuit.
Telephone line comprehensive fault detector the most according to claim 1, it is characterized in that: described sample circuit includes being connected in series in the first bleeder circuit between described polarity switching and ground end and the second bleeder circuit, the outfan that high-pressure side is sample circuit of described second bleeder circuit, the sampled signal input of described dual-electricity-limiting pressure window decision circuit is connected with the outfan of described sample circuit.
nullTelephone line comprehensive fault detector the most according to claim 3，It is characterized in that: described dual-electricity-limiting pressure window decision circuit includes 4 voltage comparators，It is respectively the first voltage comparator、Second voltage comparator、Tertiary voltage comparator、4th voltage comparator，The in-phase input end of described first voltage comparator inputs the first reference voltage，The described inverting input of the first voltage comparator is connected with the outfan of sample circuit，The described in-phase input end of the second voltage comparator is connected with the outfan of sample circuit，The inverting input of described second voltage comparator inputs the second reference voltage，The described in-phase input end of tertiary voltage comparator is connected with the outfan of sample circuit，The inverting input of described tertiary voltage comparator inputs the first reference voltage，The in-phase input end of described 4th voltage comparator inputs the second reference voltage，The inverting input of described 4th voltage comparator is connected with the outfan of sample circuit.
nullTelephone line comprehensive fault detector the most according to claim 4，It is characterized in that: described condition indication circuit includes normal condition indicating circuit、Under-voltage condition indicating circuit、And overvoltage condition indicating circuit，Described normal condition indicating circuit includes a NPN audion、First light emitting diode，The positive pole of described first light emitting diode is connected with DC source，Negative pole is connected with the colelctor electrode of a described NPN audion，The base stage of a described NPN audion is connected with the outfan of described first voltage comparator and the outfan of the second voltage comparator respectively，The emitter stage of a described NPN audion connects earth terminal，Described overvoltage condition indicating circuit includes the second light emitting diode、2nd NPN audion，The positive pole of described second light emitting diode is connected with DC source，Negative pole is connected with the colelctor electrode of described 2nd NPN audion，The base stage of described 2nd NPN audion is connected with the outfan of described tertiary voltage comparator，The emitter stage of described 2nd NPN audion connects earth terminal，Described under-voltage condition indicating circuit includes the 3rd light emitting diode、3rd NPN audion，The positive pole of described 3rd light emitting diode is connected with DC source，Negative pole is connected with the colelctor electrode of described 3rd NPN audion，The base stage of described 3rd NPN audion is connected with the outfan of described 4th voltage comparator，The emitter stage of described 3rd NPN audion connects earth terminal.
Telephone line comprehensive fault detector the most according to claim 5, it is characterised in that: described second light emitting diode is parallel with the first buzzer.
Telephone line comprehensive fault detector the most according to claim 6, it is characterised in that: described 3rd light emitting diode is parallel with the second buzzer.
8. according to the telephone line comprehensive fault detector described in any one of claim 1-7, it is characterized in that: described telephone line comprehensive fault detector also includes telephone line type detecting circuit, described telephone line type detecting circuit includes AND circuit, 4th light emitting diode, and the 4th NPN audion, two inputs of described AND circuit are connected with the 4th foot and the 5th foot of telephone power socket respectively, the positive pole of described 4th light emitting diode is connected with DC source, negative pole is connected with the colelctor electrode of described 4th NPN audion, the described base stage of the 4th NPN audion is connected with the outfan of described AND circuit, the emitter stage of described 4th NPN audion connects earth terminal.
Telephone line comprehensive fault detector the most according to claim 8, it is characterised in that: described telephone power socket is RJ45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620359766.3U CN205610749U (en) | 2016-04-26 | 2016-04-26 | Telephone circuit trouble integrated test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620359766.3U CN205610749U (en) | 2016-04-26 | 2016-04-26 | Telephone circuit trouble integrated test device |
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| CN205610749U true CN205610749U (en) | 2016-09-28 |
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| CN201620359766.3U Expired - Fee Related CN205610749U (en) | 2016-04-26 | 2016-04-26 | Telephone circuit trouble integrated test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863989A (en) * | 2017-12-07 | 2018-03-30 | 深圳电器公司 | Telephone line fault monitoring system and monitoring method |
| CN111556204A (en) * | 2020-04-22 | 2020-08-18 | 深圳震有科技股份有限公司 | Method, device, equipment and medium for detecting and processing line fault of analog telephone system |
| CN114089116A (en) * | 2021-11-22 | 2022-02-25 | 京东方科技集团股份有限公司 | Cable fault detection device and line fault detection method |
-
2016
- 2016-04-26 CN CN201620359766.3U patent/CN205610749U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863989A (en) * | 2017-12-07 | 2018-03-30 | 深圳电器公司 | Telephone line fault monitoring system and monitoring method |
| CN111556204A (en) * | 2020-04-22 | 2020-08-18 | 深圳震有科技股份有限公司 | Method, device, equipment and medium for detecting and processing line fault of analog telephone system |
| CN114089116A (en) * | 2021-11-22 | 2022-02-25 | 京东方科技集团股份有限公司 | Cable fault detection device and line fault detection method |
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Granted publication date: 20160928 Termination date: 20170426 |