CN203289069U - Current detection protective device - Google Patents
Current detection protective device Download PDFInfo
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- CN203289069U CN203289069U CN2013203315470U CN201320331547U CN203289069U CN 203289069 U CN203289069 U CN 203289069U CN 2013203315470 U CN2013203315470 U CN 2013203315470U CN 201320331547 U CN201320331547 U CN 201320331547U CN 203289069 U CN203289069 U CN 203289069U
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Abstract
The utility model provides a current detection protective device comprising a current detector, a current protective circuit, a master control one-chip microcomputer, a relay control circuit and a relay. The input end of the current detector is connected in series with a detected circuit. The output end of the current detector is connected with an analog-to-digital conversion circuit interface of master control one-chip microcomputer the through the current protective circuit. The output port of the master control one-chip microcomputer is connected with the input end of the relay through the relay control circuit. The output end of the relay is connected with a power supply line used for supplying power to the detected circuit. The current detection protective device has advantages of being simple in structure, high in working stability and high in practicality. Besides, the protective device itself is low in power consumption during current detection process so that power utilization cost is saved and power utilization rate is enhanced. If abnormal current is detected, the power supply line of the detected circuit is automatically cut off so that application safety and anti-risk performance of the detected circuit are enhanced.
Description
Technical field
The utility model belongs to the current monitoring technical field, is specifically related to a kind of current detecting protective device.
Background technology
In existing most of power circuit, usually use the constantan wire unit amplifier as the current detecting device, thereby detect the electric current of power circuit.But while using the constantan wire unit amplifier to detect electric current, when sensed current was excessive, the power consumption of constantan wire unit amplifier also increased thereupon; And along with the power consumption of constantan wire unit amplifier increases, the constantan wire temperature also constantly raises, thereby causes that the current stability that detects is low, testing result is inaccurate.
The utility model content
For the defect that prior art exists, the utility model provides a kind of current detecting protective device, has advantages of that oneself power consumption is low, job stability is high.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of current detecting protective device, comprises current detector, current protecting circuit, main control singlechip, control relay circuit and relay; The input of described current detector is connected with detected circuit; the output of described current detector is connected to the analog to digital conversion circuit interface of described main control singlechip by described current protecting circuit; the output port of described main control singlechip is connected to the input of described relay by described control relay circuit, the output of described relay is connected with the supply line that is used for to described detected circuit power supply.
Preferably, described current protecting circuit comprises current-limiting resistance, electric current backflow protective circuit and the filter circuit of pressure-stabilizing of series connection; The input of described current-limiting resistance is connected with the output of described current detector; the output of described current-limiting resistance is connected to the input of described filter circuit of pressure-stabilizing by described electric current backflow protective circuit, the output of described filter circuit of pressure-stabilizing is connected to the analog to digital conversion circuit interface of described main control singlechip.
Preferably, described main control singlechip is the chip of STC12C5201AD model.
Preferably, described current detector is the chip of ACS712 model; And/or described control relay circuit is triode.
Preferably, also comprise running LED; Described running LED is connected with described main control singlechip.
Preferably, described main control singlechip also is built-in with communication interface and reserves external interface; Described communication interface is used for connecting host computer.
The beneficial effects of the utility model are as follows:
The current detecting protective device that the utility model provides, have advantages of simple in structure, job stability is high, practicality is high; And, in the current detecting process, protective device self circuit low in energy consumption, thus saved electric cost, improved utilization rate of electrical; In case while abnormal current being detected, automatically cut off the supply line of detected circuit, thereby improved fail safe and the ability to ward off risks that detected circuit is used.
Description of drawings
The structural representation of the current detecting protective device that Fig. 1 provides for the utility model;
A kind of physical circuit schematic diagram of the current detecting protective device that Fig. 2 provides for the utility model;
A kind of physical circuit schematic diagram of the main control singlechip that Fig. 3 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
As shown in Figure 1, the utility model provides a kind of current detecting protective device, comprises current detector, current protecting circuit, main control singlechip, control relay circuit and relay; The input of described current detector is connected with detected circuit; the output of described current detector is connected to the analog to digital conversion circuit interface of described main control singlechip by described current protecting circuit; the output port of described main control singlechip is connected to the input of described relay by described control relay circuit, the output of described relay is connected with the supply line that is used for to described detected circuit power supply.Wherein, current protecting circuit comprises current-limiting resistance, electric current backflow protective circuit and the filter circuit of pressure-stabilizing of series connection; The input of described current-limiting resistance is connected with the output of described current detector; the output of described current-limiting resistance is connected to the input of described filter circuit of pressure-stabilizing by described electric current backflow protective circuit, the output of described filter circuit of pressure-stabilizing is connected to the analog to digital conversion circuit interface of described main control singlechip.Also comprise running LED; Described running LED is connected with described main control singlechip,, by the situation of change of running LED light color, shows intuitively whether the detected circuit electric current is normal.Main control singlechip also is built-in with communication interface and reserves external interface; Described communication interface is used for connecting host computer.In addition, in the utility model, relay can be replaced with controllable silicon, thereby improves Circuit responce speed and conversion speed.
As Fig. 2, Fig. 3, for a kind of physical circuit schematic diagram of current detecting protective device, in Fig. 2, current detector is the chip of ACS712 model, the internal resistance of this kind components and parts is very little, when carrying out current detecting, can effectively reduce the power consumption of components and parts self while detecting large electric current; In addition, when detecting large electric current, this kind components and parts temperature can be not too high, and then can not reduce the job stability of components and parts self.
Control relay circuit is triode; Shown in Fig. 3, main control singlechip is the chip of STC12C5201AD model.When detected circuit adopted the network type light fixture, P1 was the Wiring port that is connected in bulb circuit, and K1 is a relay, was used for controlling the break-make of supply line.When the P1 Wiring port has electric current to pass through; detect and obtain a voltage signal through ACS712; enter P11 after the protection (preventing that electric current from pouring in down a chimney) of this voltage signal by R2 current limliting, D1 diode; wherein; P11 is the AD conversion port of main control singlechip, is used for the current signal that receives is carried out analog-to-digital conversion.Capacitor C 1 is the function of stabilization signal voltage and filtering.Main control singlechip, again by the corresponding relation of electric current and voltage, calculates the current value of P1 port, realizes the detection of electric current.Main control singlechip can be preset a upper current limit value and a floor level of electric current, when the current value that detects surpasses the upper current limit value or during lower than floor level of electric current, illustrate that detected circuit has occurred to open circuit or short-circuit conditions, then main control singlechip is controlled the break-make of triode by single-chip microcomputer output port P10, final control relay break-make, while reaching the detected circuit current anomaly, in time cut off the effect of supply line.Wherein, R4 is for stablizing triode voltage, and C13 is that filtering prevents the interfered circuit level voltage.
In Fig. 3, Y1 crystal oscillator and C6, C5 form start-oscillation circuit, and being used for provides clock signal to main control singlechip; S1 is button, can carry out Artificial Control; D3 is LED, is used for the running status of display system; C9 and R17 form reset circuit; TXD, RXD are for the interface with compunlcation; P11 is the AD conversion port, and P10 is the single-chip microcomputer output port; A, B are spare interface.
The utility model also provides a kind of current detecting guard method, comprises the following steps:
S1, when described supply line powered to described detected circuit, described current detector detected the primary current signal of described detected circuit in real time;
S2, carry out voltage regulation filtering to the described primary current signal that detects and process, and obtains pretreated current signal, then described pretreated current signal exported to the analog to digital conversion circuit interface of described main control singlechip;
S3, described main control singlechip carries out analog-to-digital conversion process to the described pretreated current signal that receives, and obtains the current signal of digital signals format;
S4, described main control singlechip judge whether the current signal of described digital signals format surpasses default maximum or, less than default minimum, if judgment result is that, are to carry out S5;
In this step, main control singlechip judges the abnormal conditions of the current signal of digital signals format,, also by the light color of controlling run status indicator lamp, shows intuitively the running status of detected circuit electric current simultaneously; Concrete, if drawing the current signal of described digital signals format, the judgement of described main control singlechip surpasses default maximum, control described running LED and show the first color; If the current signal that described main control singlechip judgement draws described digital signals format, less than default minimum, is controlled described running LED and is shown the second color; If the current signal that described main control singlechip judgement draws described digital signals format between described default minimum and described default maximum, is controlled described running LED and is shown the 3rd color; Wherein, described the first color, described the second color and described the 3rd color are different.
S5, described main control singlechip sends shutoff signal to described control relay circuit, disconnects described relay by described control relay circuit, and then cuts off described supply line.
When the detected circuit current anomaly,, by the control of main control singlechip, can automatically cut off the supply line of detected circuit, reduce the damage of detected circuit, thereby improved the safety in utilization of circuit.
In addition, main control singlechip also has the function of detected circuit electrical measurement, implementation is: the electricity consumption value of the described detected circuit of main control singlechip Real-Time Monitoring, and, according to the power consumption time that clock chip provides in real time, record electricity consumption value and the corresponding relation of power consumption time of described detected circuit.
The current detecting protective device that the utility model provides can be widely used in the systems such as machine room testing circuit, the control of cloud illuminator and electric weight detection control; thereby realize to the protection of detected circuit and to the detection of circuital current; and; by program control; can realize the intelligence computation of electric weight, in order to the measuring electric quantity use amount.Below introduce the concrete application scenarios of two kinds of current detecting protective devices:
The first application scenarios: the electric current to detected circuit carries out Real-Time Monitoring
The current detecting protective device that the utility model is provided is connected in series to detected circuit, then by communication interface, be connected on computer or main frame, thereby realization is to the Real-Time Monitoring of the electric current of detected circuit.
The second application scenarios: cloud illuminator current monitoring
Execution mode two: cloud illuminator monitoring
The cloud illuminator has a plurality of bulb nodes; at each bulb node current detecting protective device that the utility model provides of connecting respectively; thereby detect the current value of each light; calculating by the computer that is connected with the current detecting protective device; can obtain power consumption and the power of each bulb;, according to certain control algolithm, can control the electric current service condition of each light, and then realize energy-conservation purpose.
In sum, the current detecting protective device that the utility model provides, have advantages of simple in structure, job stability is high, practicality is high; And, in the current detecting process, protective device self circuit low in energy consumption, thus saved electric cost, improved utilization rate of electrical; In case while abnormal current being detected, automatically cut off the supply line of detected circuit, thereby improved fail safe and the ability to ward off risks that detected circuit is used.
The above is only preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection range of the present utility model.
Claims (6)
1. a current detecting protective device, is characterized in that, comprises current detector, current protecting circuit, main control singlechip, control relay circuit and relay; The input of described current detector is connected with detected circuit; the output of described current detector is connected to the analog to digital conversion circuit interface of described main control singlechip by described current protecting circuit; the output port of described main control singlechip is connected to the input of described relay by described control relay circuit, the output of described relay is connected with the supply line that is used for to described detected circuit power supply.
2. current detecting protective device according to claim 1, is characterized in that, described current protecting circuit comprises current-limiting resistance, electric current backflow protective circuit and the filter circuit of pressure-stabilizing of series connection; The input of described current-limiting resistance is connected with the output of described current detector; the output of described current-limiting resistance is connected to the input of described filter circuit of pressure-stabilizing by described electric current backflow protective circuit, the output of described filter circuit of pressure-stabilizing is connected to the analog to digital conversion circuit interface of described main control singlechip.
3. current detecting protective device according to claim 1, is characterized in that, described main control singlechip is the chip of STC12C5201AD model.
4. current detecting protective device according to claim 1, is characterized in that, described current detector is the chip of ACS712 model; And/or described control relay circuit is triode.
5. current detecting protective device according to claim 1, is characterized in that, also comprises running LED; Described running LED is connected with described main control singlechip.
6. current detecting protective device according to claim 1, is characterized in that, described main control singlechip also is built-in with communication interface and reserves external interface; Described communication interface is used for connecting host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203315470U CN203289069U (en) | 2013-06-08 | 2013-06-08 | Current detection protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203315470U CN203289069U (en) | 2013-06-08 | 2013-06-08 | Current detection protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203289069U true CN203289069U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203315470U Expired - Lifetime CN203289069U (en) | 2013-06-08 | 2013-06-08 | Current detection protective device |
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| Country | Link |
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| CN (1) | CN203289069U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343991A (en) * | 2018-09-26 | 2019-02-15 | Oppo广东移动通信有限公司 | The detection method of electronic equipment and its power consumption exception, storage medium |
| CN109617022A (en) * | 2018-12-28 | 2019-04-12 | 中国船舶重工集团公司第七0研究所 | A kind of power control supporting fault diagnosis and restoring |
-
2013
- 2013-06-08 CN CN2013203315470U patent/CN203289069U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343991A (en) * | 2018-09-26 | 2019-02-15 | Oppo广东移动通信有限公司 | The detection method of electronic equipment and its power consumption exception, storage medium |
| CN109617022A (en) * | 2018-12-28 | 2019-04-12 | 中国船舶重工集团公司第七0研究所 | A kind of power control supporting fault diagnosis and restoring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |