CN202042443U - Universal load fuse alarm - Google Patents
Universal load fuse alarm Download PDFInfo
- Publication number
- CN202042443U CN202042443U CN2011200936070U CN201120093607U CN202042443U CN 202042443 U CN202042443 U CN 202042443U CN 2011200936070 U CN2011200936070 U CN 2011200936070U CN 201120093607 U CN201120093607 U CN 201120093607U CN 202042443 U CN202042443 U CN 202042443U
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- electronic switch
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- input circuit
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Abstract
The utility model relates to a universal load fuse alarm, which comprises a load fuse signal input circuit, a signal indicating circuit, test circuits, an isolating circuit and a signal output circuit. The universal load fuse alarm is characterized in that the load fuse signal input circuit consists of an OR gate input circuit, a resistance voltage division circuit and a voltage control type electronic switch in sequential connection, the signal indicating circuit consists of a light emitting diode and a current limiting resistor, the test circuits are button switches, the isolating circuit is a relay, the signal output circuit is a photoelectric coupler, an upper arm of the resistance voltage division circuit is serially connected into a loop of the OR gate input circuit, a voltage division point is connected to a control end of the voltage control type electronic switch, the signal indicating circuit is serially connected with the voltage control type electronic switch, the test circuits are parallelly connected at two ends of the voltage control type electronic switch, the relay is serially connected with the voltage control type electronic switch through the current limiting resistor, and a normally open contact of the relay is serially connected with a light emitting diode in the photoelectric coupler.
Description
Technical field
The utility model relates to technical field of telecommunications, is specifically related to the power supply system for communications, particularly relates to the load fuse alarm device of the power supply system for communications.
Background technology
The communications field commonly used-48V dc-dc conversion system, be handle+24V direct current be converted to anodal as with reference to point-the 48V direct current, and+24V dc-dc conversion system, be that handle-48V direct current is converted to negative pole and puts+the 24V direct current as reference.The control circuit that uses in the system generally adopts the input voltage power supply, because of the reference point of input and output different, for avoiding control loop and the output loop that detects the load fuse state because of causing short circuit altogether, must be with the control loop and the output loop isolation of load fuse warning circuit.Scheme in the past adopts photoelectrical coupler to isolate mostly, though the driving voltage of photoelectrical coupler is lower, driving power is little, and it is relatively poor to transient pulse group and surge vulnerability to jamming, very easily misoperation.
Summary of the invention
In view of there is above-mentioned deficiency in prior art, technical problem to be solved in the utility model is to improve the antijamming capability of load fuse warning circuit.
The technical scheme that the utility model addresses the above problem is as follows:
A kind of general load fuse alarm device, this alarm device comprises load fuse signal input circuit, signal indicating circuit, test circuit, buffer circuit and signal output apparatus, it is characterized in that,
The load fuse signal input circuit by or door input circuit, resistor voltage divider circuit and voltage-controlled type electronic switch connect and compose successively; Signal indicating circuit is made of light-emitting diode and current-limiting resistance; Test circuit is a push-button switch; Buffer circuit is a relay; Signal output apparatus is a photoelectrical coupler; Wherein,
The upper arm of resistor voltage divider circuit be series at or the door input circuit the loop in, dividing point is connected the control end of voltage-controlled type electronic switch; Signal indicating circuit is connected with the voltage-controlled type electronic switch; Test circuit is connected in parallel on the two ends of voltage-controlled type electronic switch; Relay is connected with the voltage-controlled type electronic switch through current-limiting resistance; The normally opened contact of relay is connected with the light-emitting diode in the photoelectrical coupler.
General load fuse alarm device described in the utility model, any one tunnel load fuse signal through or door input circuit and resistor voltage divider circuit to field effect transistor drive circuit control end or the time, the field effect transistor conducting, light-emitting diode in the signal indicating circuit is lighted, disconnecting relay adhesive simultaneously, this moment relay the normally opened contact closure, the signal output loop is communicated with, alarm signal inputs in the I/O mouth of single-chip microcomputer through photoelectrical coupler, and single-chip microcomputer promptly sends the alarm of sound/light.
A kind of general load fuse alarm device described in the utility model according to its operating voltage difference, can be divided into two kinds of positive voltage output system load fuse alarm device and negative voltage output system load fuse alarm devices.Wherein, if negative voltage output system load fuse alarm device, then described or door input circuit is made up of a plurality of negative electrode diode connected in parallel, and described voltage-controlled type electronic switch is a positive voltage control type electronic switch; If positive voltage output system load fuse alarm device, then described or door input circuit is made up of a plurality of anode diode connected in parallel, and described voltage-controlled type electronic switch is a negative voltage control type electronic switch.
Load fuse alarm device described in the utility model, when the load fuse signal through or door input circuit and resistor voltage divider circuit after by the clamped grid that inputs to field effect transistor of voltage stabilizing didoe, then field effect transistor conducting, make the alarm indicating circuit be communicated with, light-emitting diode is lighted, the relay coil of connecting with current-limiting resistance simultaneously gets, when surpass relay-operating time conduction time, relay normally open contact closure then, the signal output loop is communicated with, alarm signal inputs to the I/O mouth of single-chip microcomputer through photoelectrical coupler, sends the alarm of sound/light.
Description of drawings
Fig. 1 is the structured flowchart of a specific embodiment of load fuse alarm device described in the utility model.
Fig. 2 is the circuit theory diagrams of a specific embodiment of load fuse alarm device described in the utility model.
Fig. 3 is the circuit theory diagrams of another specific embodiment of load fuse alarm device described in the utility model.
Embodiment
Example 1
Present embodiment is-48V load fuse alarm device.Referring to Fig. 2, the field effect transistor drive circuit comprises N channel field-effect pipe Q1 and the clamped voltage stabilizing didoe ZD1 of grid thereof, and the source electrode of N channel field-effect pipe N1 links to each other with-48V power supply, and drain electrode links to each other with an end of signal indicating circuit and relay coil; Resistor voltage divider circuit is made of upper arm resistance R 5, underarm resistance R 4, and its dividing point links to each other with the grid of N channel field-effect pipe Q1, and the other end of resistance R 5 links to each other with the negative electrode of diode D2-D17; Diode D2-D17 constitutes 16 passage positive voltages or door input circuit, and its anode links to each other with+48V power supply respectively.Signal indicating circuit is composed in series by current-limiting resistance R3 and LED 1, and the end of current-limiting resistance R3 links to each other with+48V power supply, and the other end links to each other with the anode of LED.Buffer circuit is reached by current-limiting resistance R1, relay R ELAY1 and the reset diode D1 of relay R ELAY1 coils from parallel connection of coils constitutes, and an end of resistance R 1 links to each other with relay R ELAY1 coil, other end connection+48V power supply.Test circuit is made of the drain electrode that is parallel to N channel field-effect pipe Q1 and the Test Switchboard S1 at source electrode two ends.Signal output apparatus is made of photoelectrical coupler N1 and current-limiting resistance R2, one end of current-limiting resistance links to each other with the light-emitting diodes tube anode of photoelectrical coupler N1, the other end and+48V or+24V links to each other, the light-emitting diodes tube cathode of photoelectrical coupler N1 and-48V or-24V links to each other.
Referring to Fig. 2, after any passage load fuse short circuit, input signal is imported through positive voltage diode OR gate input circuit, the grid of the positive voltage of OR circuit output input N channel field-effect pipe Q1 after resistance R 5 and resistance R 4 dividing potential drops, simultaneously, diode D2-D17 plays unidirectional conducting effect, and input signal and other passages of the load fuse short-channel that makes can not constitute the loop, the voltage of clamped voltage stabilizing didoe ZD1 restriction N channel field-effect pipe Q1 grid prevents that grid from damaging because of overvoltage.After the N channel field-effect pipe Q1 conducting, signal indicating circuit, alarm signal buffer circuit all form path, LED 1 is luminous, relay R ELAY1 coil is charged, surpass relay actuation time when pickup time, then normally opened contact engages, and makes signal output apparatus form the loop, the light-emitting diode of photoelectrical coupler N1 couples a signal to phototriode, by phototriode signal is sent in the I/O mouth of single-chip microcomputer.
Example 2
Present embodiment is+24V load fuse alarm device.Referring to Fig. 3, the field effect transistor drive circuit comprises P-channel field-effect transistor (PEFT) pipe Q2 and the clamped voltage stabilizing didoe ZD2 of grid thereof, the source electrode of P-channel field-effect transistor (PEFT) pipe Q2 links to each other with+24V power supply, and drain electrode links to each other with the current-limiting resistance of signal indicating circuit and current-limiting resistance one end of buffer circuit; Resistor voltage divider circuit is made of upper arm resistance R 5-R20, underarm resistance R 3, and its dividing point links to each other with the grid of P-channel field-effect transistor (PEFT) pipe Q2, and the other end of upper arm resistance R 5-R20 links to each other with the anode of double diode D2-D17; Double diode D2-D17 constitutes 16 passage negative voltages or door input circuit, and its negative electrode links to each other with-24V power supply respectively.Signal indicating circuit is composed in series by current-limiting resistance R4 and LED 1, and current-limiting resistance R4 one end links to each other with the anode of LED1, and the negative electrode of LED 1 links to each other with-24V power supply.Buffer circuit is made of current-limiting resistance R1, relay R ELAY1 and the reset diode D1 in parallel with relay coil RELAY1, and an end of resistance R 1 links to each other with the coil of relay R ELAY1, and the other end of relay R ELAY1 coil links to each other with-24V power supply.Test circuit is made of the Test Switchboard S1 at drain electrode that is parallel to P-channel field-effect transistor (PEFT) pipe Q2 and source electrode two ends.Signal output apparatus is made of photoelectrical coupler N1 and current-limiting resistance R2, one end of current-limiting resistance links to each other with the light-emitting diodes tube anode of photoelectrical coupler N1, the other end and+48V or+24V links to each other, the light-emitting diodes tube cathode of photoelectrical coupler N1 and-48V or-24V links to each other.
Referring to Fig. 3, after any passage load fuse short circuit, output signal is through the input of negative voltage diode OR gate input circuit, and the negative voltage of OR circuit output is imported the grid of P-channel field-effect transistor (PEFT) pipe Q2 after upper arm R5-R20 and underarm R4 dividing potential drop.Diode D2-D17 plays unidirectional conducting effect, and input signal and other passages of the load fuse short-channel that makes can not constitute the loop.Simultaneously, when breakdown as if one or several diode among the D2-D17, because the metering function of R5-R20, the passage at breakdown diode place can directly not be communicated with other passages, causes short circuit.The voltage of clamped voltage stabilizing didoe ZD2 restriction P-channel field-effect transistor (PEFT) pipe Q2 grid prevents that grid from damaging because of overvoltage.After the P-channel field-effect transistor (PEFT) pipe Q2 conducting, signal indicating circuit, alarm signal buffer circuit all form path, LED 1 is luminous, relay R ELAY1 coil is charged, when electrification time surpasses relay actuation time, then normally opened contact engages, and makes signal output apparatus form the loop, the light-emitting diode of photoelectrical coupler N1 couples a signal to phototriode, by phototriode signal is sent in the I/O mouth of single-chip microcomputer.
Claims (3)
1. general load fuse alarm device, this alarm device comprises load fuse signal input circuit, signal indicating circuit, test circuit, buffer circuit and signal output apparatus, it is characterized in that,
The load fuse signal input circuit by or door input circuit, resistor voltage divider circuit and voltage-controlled type electronic switch connect and compose successively; Signal indicating circuit is made of light-emitting diode and current-limiting resistance; Test circuit is a push-button switch; Buffer circuit is a relay; Signal output apparatus is a photoelectrical coupler; Wherein,
The upper arm of resistor voltage divider circuit be series at or the door input circuit the loop in, dividing point is connected the control end of voltage-controlled type electronic switch; Signal indicating circuit is connected with the voltage-controlled type electronic switch; Test circuit is connected in parallel on the two ends of voltage-controlled type electronic switch; Relay is connected with the voltage-controlled type electronic switch through current-limiting resistance; The normally opened contact of relay is connected with the light-emitting diode in the photoelectrical coupler.
2. a kind of general load fuse alarm device according to claim 1 is characterized in that, described resistor voltage divider circuit, its upper arm by be series at or the door input circuit each input circuit in resistance form.
3. a kind of general load fuse alarm device according to claim 1 and 2, it is characterized in that, described or door input circuit is made up of a plurality of negative electrodes or anode diode connected in parallel, when described or door input circuit were made up of a plurality of negative electrode diode connected in parallel, described voltage-controlled type electronic switch was a positive voltage control type electronic switch; When described or door input circuit were made up of a plurality of anode diode connected in parallel, described voltage-controlled type electronic switch was a negative voltage control type electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200936070U CN202042443U (en) | 2011-04-01 | 2011-04-01 | Universal load fuse alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200936070U CN202042443U (en) | 2011-04-01 | 2011-04-01 | Universal load fuse alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202042443U true CN202042443U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200936070U Expired - Fee Related CN202042443U (en) | 2011-04-01 | 2011-04-01 | Universal load fuse alarm |
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| CN (1) | CN202042443U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975643A (en) * | 2017-12-28 | 2019-07-05 | 沃尔缇夫能源系统公司 | Load fuse detection method and equipment |
| CN110834652A (en) * | 2019-11-29 | 2020-02-25 | 中车大连机车车辆有限公司 | Locomotive overspeed automatic unloading device, locomotive overspeed automatic unloading method and vehicle |
-
2011
- 2011-04-01 CN CN2011200936070U patent/CN202042443U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975643A (en) * | 2017-12-28 | 2019-07-05 | 沃尔缇夫能源系统公司 | Load fuse detection method and equipment |
| CN109975643B (en) * | 2017-12-28 | 2021-07-13 | 维谛公司 | Load fuse detection method and device |
| CN110834652A (en) * | 2019-11-29 | 2020-02-25 | 中车大连机车车辆有限公司 | Locomotive overspeed automatic unloading device, locomotive overspeed automatic unloading method and vehicle |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20190401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |