CN204559232U - For the supervising device of fuse - Google Patents
For the supervising device of fuse Download PDFInfo
- Publication number
- CN204559232U CN204559232U CN201520113840.9U CN201520113840U CN204559232U CN 204559232 U CN204559232 U CN 204559232U CN 201520113840 U CN201520113840 U CN 201520113840U CN 204559232 U CN204559232 U CN 204559232U
- Authority
- CN
- China
- Prior art keywords
- fuse
- optocoupler
- diode
- connects
- supervising device
- 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.)
- Active
Links
Abstract
The utility model relates to the supervising device for fuse, comprises optocoupler, diode and power field effect pipe.The hot junction of described fuse is connected in parallel on power distribution circuit.The anode of the light-emitting diode of described optocoupler connects the cold junction of described fuse, its minus earth.The collector electrode of the phototransistor of described optocoupler connects supply voltage, and its emitter is by a load resistance ground connection.The negative electrode of described diode connects the emitter of the phototransistor of described optocoupler.The grid of described power field effect pipe connects the anode of described diode, and connects supply voltage by the first divider resistance, and by the second divider resistance ground connection.Supervising device of the present utility model can monitor multichannel fuse, thus conserve space and cost, improve the reliability and maintainability in distributed control system power distribution loop.
Description
Technical field
This novel practical relates to the supervising device for fuse, especially monitors fuse and the supervising device of remote alarms.
Background technology
Distributed control system (i.e. DCS, English full name Distributed Control System) is one, and what be made up of process control level and process monitoring level take communication network as the multi-level computer system of tie.Wherein, the DC power supply of control system needs the sensor assignment access voltage a large amount of to scene or operating voltage, and cheap fuse that power distribution circuit must be connected, to prevent the DC power supply of spot sensor power circuit short or overload destruct limit system.This type of fuse is often thousands of in a distributed control system, but once fuse, great majority wherein cannot automatic alarm.
Utility model content
The purpose of this utility model is to provide a kind of supervising device for fuse, and it can monitor the state of fuse, and automatic output switch amount carries out remote alarms after fuse blows.This supervising device for fuse comprises the NAND gate circuit of the discrete component compositions such as optocoupler, diode, power field effect pipe and related resistors, by detecting the voltage signal of fuse output, when one or more fuse blows any, release relay contact, send contact switch amount signal and carry out remote alarms, and do not need the operating voltage needed for extra conversion generation TTL integrated gate circuit.Supervising device for fuse of the present utility model can monitor multichannel fuse, thus conserve space and cost, improve the reliability and maintainability of distributed control system.Use power field effect pipe to be used for driving relay in circuit, be suitable for long-term live line work.
The supervising device for fuse that the utility model provides, comprises optocoupler, diode and power field effect pipe.The anode of the light-emitting diode of described optocoupler connects the cold junction of described fuse, its minus earth.The collector electrode of the phototransistor of described optocoupler connects supply voltage, and its emitter is by a load resistance ground connection.Described diode cathode connects the emitter of the phototransistor of described optocoupler.The grid of described power field effect pipe connects the anode of described diode, and connects supply voltage by the first divider resistance, and by the second divider resistance ground connection.
According to an aspect of the present utility model, supervising device for fuse comprises the identical a plurality of described fuse of quantity, described optocoupler and described diode, and each of wherein said fuse is only corresponding in described optocoupler and described fuse.The anode of described diode connects the grid of described power field effect pipe simultaneously.Multiple fuse state all can be monitored and only pass through an on-off model remote alarms.Optocoupler can effectively by fault fuse loop and signal conditioning circuit isolation.
According to another aspect of the present utility model, described diode adopts the form of diode array in circuit integrated.Adopt diode array can obtain less volume and cheaper cost.
According to one side more of the present utility model, the anode of the light-emitting diode of described optocoupler connects described fuse by a current-limiting resistance.
According to another aspect of the present utility model, the drain electrode of described power field effect pipe connects a relay.
Hereafter by clearly understandable mode, accompanying drawings preferred embodiment, is further described the above-mentioned characteristic of isolating switch, technical characteristic, advantage and implementation thereof.
Accompanying drawing explanation
The following drawings only schematically illustrates the utility model and explains, does not limit scope of the present utility model.
Fig. 1 is the circuit diagram of the utility model supervising device.
In Fig. 1, component symbol illustrates:
| U1～U8 | Optocoupler | R91、R92 | Divider resistance |
| D1～D8 | Diode | Q1 | Power field effect pipe |
| D9 | Power field effect pipe | K1 | Relay |
| R11～R81 | Current-limiting resistance | VCC | Supply voltage |
| R12～R82 | Load resistance |
Embodiment
In order to the technical characteristic to utility model, object and effect have understanding clearly, now contrast accompanying drawing and embodiment of the present utility model is described, label identical in the various figures represents the identical or structural similarity of structure but the identical parts of function.
In this article, " schematically " expression " serves as example, example or explanation ", not should by being described to any diagram of " schematically " in this article, execution mode is interpreted as a kind of preferred or have more the technical scheme of advantage.
For making simplified form, only schematically show the part relevant to the utility model in each figure, they do not represent its practical structures as product.In addition, being convenient to for making simplified form understand, there are the parts of same structure or function in some figure, only schematically depict one of them, or only having marked one of them.
In this article, " one " not only represents " only this ", also can represent the situation of " more than one ".In this article, " on ", D score, "front", "rear", "left", "right" etc. only for representing the position relationship between relevant portion, and their absolute position non-limiting.
In this article, " first ", " second " etc. only for differentiation each other, but not represent they significance level and order etc.
Fig. 1 is the circuit diagram of the utility model supervising device, and wherein optocoupler U1 to U8 is for detecting the voltage of fuse F1 to F8, and wherein the hot junction of fuse F1 to F8 is connected in parallel on power distribution circuit.Optocoupler U1 to U8 welds on a printed circuit, the printed circuit board (PCB) of such as 56mm × 68mm.Although welded 8 optocoupler U1 to U8 in Fig. 1, it will be understood by those skilled in the art that the quantity of optocoupler can change as required, and the size of printed circuit board (PCB) also correspondingly can change as required.For optocoupler U1, the emitter of the phototransistor of optocoupler U1 connects load resistance (also claiming pull down resistor) R12, and its collector electrode connects supply voltage VCC.The upper end of load resistance R12 connects the emitter of phototransistor, its lower end ground connection.Optocoupler U1 to U8 is such as optocoupler integrated circuit PS2805-1, and diode is such as 1N4007, and power field effect pipe is IRF740, but also can be the optocoupler of other model, diode and power field effect pipe.Still for U1, when fuse F1 to F8 all normally works (namely not fusing), the anode of the light-emitting diode of optocoupler U1 input obtains voltage and luminous, phototransistor conducting by illumination of optocoupler U1 output through current-limiting resistance R11.Due to phototransistor conducting, therefore the voltage of load resistance R12 upper end is supply voltage VCC.Meanwhile, the gate voltage values of power field effect pipe Q1 equals because of the dividing potential drop effect of divider resistance R91, R92
and be less than VCC, so the anode voltage of diode D1 is lower than cathode voltage, therefore D1 keeps reverse blocking state.In like manner, when fuse F1 ~ F8 all normally works, diode D1 ~ D8 all oppositely ends, and optocoupler U1 ~ U8 and diode D1 ~ D8 can not have an impact to the grid voltage of power field effect pipe Q1.Because the drain electrode of power field effect pipe Q1 connects supply voltage VCC by the coil of relay K 1, and the grid voltage of power field effect pipe Q1
when being greater than the threshold voltage of power field effect pipe conducting, power field effect pipe Q1 conducting.Now, the lower terminal potential of relay K 1 is 0, and the coil of relay K 1 obtains electric, and then impels relay K 1 adhesive.
Working condition when still for U1 any one or several fuse blows in fuse F1 ~ F8 being described.When fuse F1 fuses, the anode of the light-emitting diode of optocoupler U1 input cannot obtain voltage and luminous through current-limiting resistance R11, and the phototransistor of optocoupler U1 output is because of by being in by state less than illumination.Now, the voltage of load resistance R12 upper end by drop-down be 0V much smaller than supply voltage VCC, therefore diode D1 anode voltage
much larger than the cathode voltage of 0V and conducting, thus make the grid voltage of power field effect pipe Q1 pulled down to below threshold voltage, therefore power field effect pipe Q1 is in cut-off state.The lower terminal potential of relay K 1 is identical with upper terminal potential is all VCC, and then causes the coil losing electricity of relay K 1, and contact discharges.Because the resistance of R92 is far longer than the resistance of R12, so the grid voltage of power field effect pipe Q1 is pulled low to by the loop formed by diode D1, load resistance R12, divider resistance R91 and R92
(voltage drop when wherein, 0.7V is IN4007 diode current flow).The resistance of the R12 appropriately chosen, makes the grid voltage of power field effect pipe Q1 much smaller than threshold voltage (being generally 2 ~ 4V), thus causes power field effect pipe Q1 to end, and then makes relay electric-loss, and final output alarm signal.If fuse blows is more, the grid voltage of Q1 is lower, and therefore any number of fuse blows power field effect pipe Q1 can end.In addition, if VCC or vdd voltage are 0, relay K 1 also can dead electricity be in alarm condition.In addition, can the detected fuse circuit of Phototube Coupling and warning circuit by the optocoupler in circuit.
Seen from the above description, optocoupler U1 to U8, diode D1 to D8, resistance R11 to R81, R12 to R82, R91, R92 and power field effect pipe Q1 actually constitute the output voltage of a NAND gate circuit to multichannel fuse F1 to F8 and carry out NOT-AND operation.If fuse F1 to F8 fusing all can cause NAND gate to export high level arbitrarily, thus causes relay K 1 coil losing electricity, contact is caused to discharge.When using different optocoupler models, choose resistance R11 to R81, R12 to R82, R91 and R92 of different resistance, the utility model goes for different operating voltages and signal voltage.Supervising device for fuse of the present utility model, can adopt any direct-current working volts, and need not be limited to the operating voltage using commercially available integrated circuit gate circuit.Employ diode array in circuit, the voltage signal of any multichannel can be inputted, and be not limited to the input signal of the limited way of commercially available integrated circuit gate circuit.
Be to be understood that, although this specification describes according to each embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for possible embodiments of the present utility model; they are also not used to limit protection range of the present utility model; allly do not depart from the utility model skill equivalent embodiments of doing of spirit or change; as the combination of feature, segmentation or repetition, all should be included within protection range of the present utility model.
Claims (5)
1. for the supervising device of fuse, it is characterized in that, comprising:
An optocoupler (U1 ~ U8), the anode of the light-emitting diode of wherein said optocoupler (U1 ~ U8) connects the cold junction of a fuse (F1 ~ F8), its minus earth, the collector electrode of the phototransistor of described optocoupler (U1 ~ U8) connects supply voltage (VCC), and its emitter is by load resistance (R12 ~ R82) ground connection;
A diode (D1 ~ D8), its negative electrode connects the emitter of the phototransistor of described optocoupler (U1 ~ U8); And a power field effect pipe (Q1), its grid connects the anode of described diode (D1 ~ D8), and connect supply voltage (VCC) by the first divider resistance (R91), and by the second divider resistance (R92) ground connection.
2. as claimed in claim 1 for the supervising device of fuse, it is characterized in that, comprise the identical a plurality of described optocoupler (U1 ~ U8) of quantity and described diode (D1 ~ D8), each of wherein said fuse (F1 ~ F8) is only corresponding in described optocoupler (U1 ~ U8) and described diode (D1 ~ D8), and the anode of described diode (D1 ~ D8) connects the grid of described power field effect pipe (Q1) simultaneously.
3., as claimed in claim 1 for the supervising device of fuse, it is characterized in that, described diode (D1 ~ D8) adopts the form of diode array in circuit integrated.
4. as claimed in claim 1 for the supervising device of fuse, it is characterized in that, the anode of the light-emitting diode of described optocoupler (U1 ~ U8) connects the cold junction of described fuse (F1 ~ F8) by a current-limiting resistance (R11 ~ R81).
5., as claimed in claim 1 for the supervising device of fuse, it is characterized in that, the drain electrode of described power field effect pipe (Q1) connects a relay (K1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113840.9U CN204559232U (en) | 2015-02-16 | 2015-02-16 | For the supervising device of fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113840.9U CN204559232U (en) | 2015-02-16 | 2015-02-16 | For the supervising device of fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204559232U true CN204559232U (en) | 2015-08-12 |
Family
ID=53834303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520113840.9U Active CN204559232U (en) | 2015-02-16 | 2015-02-16 | For the supervising device of fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204559232U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738751A (en) * | 2019-02-15 | 2019-05-10 | 西蒙电气（中国）有限公司 | It supports to realize the automatic device for detecting fuse tube failure |
| WO2021081755A1 (en) * | 2019-10-29 | 2021-05-06 | Suzhou Littelfuse Ovs Co., Ltd. | Systems, circuits, and methods for determining status of fuse or relay |
| CN115436549A (en) * | 2022-09-16 | 2022-12-06 | 华电智控（北京）技术有限公司 | Protection device and method for temperature control of chromatograph |
| EP4081815A4 (en) * | 2019-12-26 | 2023-01-04 | Suzhou Littelfuse OVS Co., Ltd. | Step voltage identification for multiple inputs |
-
2015
- 2015-02-16 CN CN201520113840.9U patent/CN204559232U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738751A (en) * | 2019-02-15 | 2019-05-10 | 西蒙电气（中国）有限公司 | It supports to realize the automatic device for detecting fuse tube failure |
| WO2021081755A1 (en) * | 2019-10-29 | 2021-05-06 | Suzhou Littelfuse Ovs Co., Ltd. | Systems, circuits, and methods for determining status of fuse or relay |
| US11802892B2 (en) | 2019-10-29 | 2023-10-31 | Suzhou Littelfuse Ovs Co., Ltd. | Systems, circuits, and methods for determining status of fuse or relay |
| EP4081815A4 (en) * | 2019-12-26 | 2023-01-04 | Suzhou Littelfuse OVS Co., Ltd. | Step voltage identification for multiple inputs |
| CN115436549A (en) * | 2022-09-16 | 2022-12-06 | 华电智控（北京）技术有限公司 | Protection device and method for temperature control of chromatograph |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204559232U (en) | For the supervising device of fuse | |
| CN203326580U (en) | Battery-reversal-connection protection device for electronic cigarette | |
| CN103311876A (en) | Power supply fuse alarming circuit and alarming device | |
| CN204068678U (en) | A kind of Switching Power Supply output over-voltage protection and thermal-shutdown circuit | |
| CN106560958A (en) | Low-power-consumption voltage protection circuit and gas meter | |
| CN208508514U (en) | A kind of short-circuit protection circuit of switching circuit | |
| CN204882821U (en) | Killer switch state detection circuitry | |
| CN206099296U (en) | Overvoltage crowbar and electronic equipment | |
| CN203367969U (en) | Overcurrent protection circuit of data unit | |
| CN202435015U (en) | Power supply system | |
| CN201994042U (en) | Single-pipe expansion port matrix light emitting diode (LED) driving circuit | |
| CN208257983U (en) | Mute control circuit for power failure | |
| CN207717932U (en) | Circuit state diagnostic circuit | |
| CN206293877U (en) | A kind of overvoltage crowbar | |
| CN105116200B (en) | A kind of detection circuit of compatible switch amount and level amount | |
| CN204719122U (en) | A kind of voltage detecting warning circuit | |
| CN203465345U (en) | External voltage automatic detection and alarm circuit | |
| CN207664618U (en) | A kind of video image information uniform access system | |
| CN209639278U (en) | A kind of electric water heater controller and electric heater | |
| CN201556292U (en) | Remote controller | |
| CN105333573A (en) | Detecting device for air conditioner wind-sweeping fan blade drive signal, test method for detecting device and air conditioner | |
| CN101763699A (en) | Electricity-saving LED light alarm circuit | |
| CN111398852A (en) | Power output short circuit detection circuit and electronic equipment | |
| CN205333772U (en) | GNSS sky line detection and protection circuit | |
| CN214228516U (en) | LED power overpower protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. A1051-1, Nanjing High tech Industrial Development Zone, Nanjing, Jiangsu Province, 211100 Patentee after: Siemens Energy Automation (Nanjing) Co.,Ltd. Address before: No. A1051-1, Nanjing High tech Industrial Development Zone, Nanjing, Jiangsu Province, 211100 Patentee before: SIEMENS POWER PLANT AUTOMATION Ltd. |