CN108872765A - A kind of power circuit payload security detection system - Google Patents
A kind of power circuit payload security detection system Download PDFInfo
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- CN108872765A CN108872765A CN201810520244.0A CN201810520244A CN108872765A CN 108872765 A CN108872765 A CN 108872765A CN 201810520244 A CN201810520244 A CN 201810520244A CN 108872765 A CN108872765 A CN 108872765A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The present invention relates to power circuit technical fields, and in particular to a kind of power circuit payload security detection system, including load current detection circuit, integrated alarm circuit, communication system and central processing system；Integrated alarm circuit of the invention can sending sound automatically, two kinds of alarm signals of light, it reminds user to power off in time to overhaul, the alarm current of leakage-current alarm circuit is less than 0.4mA, far below the requirement that the earth leakage protective device desired action current of national regulation is less than 30mA, using more accurate convenient, communication system uses SOC chip, largely reduce the quantity of peripheral component, to reduce the cabling between component, be conducive to improve the reliability and stability of I/O slave station, output interface also uses photoelectrical coupler TLP512, microcontroller C8051F020 output port and the load at scene is completely isolated.After output channel and photoelectric isolating circuit, also enhance the driving capability of output interface using output driving chip UDN2981, signal transmission is more quick, has very strong creativeness.
Description
Technical field
The present invention relates to power circuit technical fields, and in particular to a kind of power circuit payload security detection system.
Background technique
Electric power is the energy using electric energy as power.Invention is started in 19 century 70s, the invention and application of electric power
Second of industrialization climax.Since 18th century of human history, one of scientific and technological revolution three times that the world occurs, from this section's technological transformation
People's lives are become.The large-scale electrical power system that 20th century occurred is one of most important achievement in the human engineering history of science,
The power generation and consumption system being made of links such as power generation, transmission of electricity, power transformation, distribution and electricity consumptions.It is by the primary of nature
The energy is converted to electric power by mechanical energy device, then supplies power to each user through transmission of electricity, power transformation and distribution.The transmission of electric energy
Together with power transformation, distribution, electricity consumption, the allomeric function of electric system is constituted.By transmission of electricity, far apart (up to thousands of thousand
Rice) power plant and load center connect, and so that the development and utilization of electric energy is surmounted the limitation of region.With the transmission of other energy
(such as defeated coal, oil transportation) is compared, the loss of transmission of electricity is small, high efficiency, it is flexible and convenient, be easy to regulate and control, be low in the pollution of the environment；Transmission of electricity may be used also
To connect the power plant of different location, carries out peak valley and adjust.Transmission of electricity is the important embodiment of utilization of power superiority, existing
In generationization society, it is important energy artery.In the patent document of Patent No. CN201711362522, one kind is disclosed
Electrical load detection of electrical leakage warning circuit, including detecting electrode A, light-coupled isolation detection circuit, delay trigger circuit, warning circuit
And power circuit, the power circuit are separately connected light-coupled isolation detection circuit, delay trigger circuit and warning circuit, detection electricity
Pole A connection light-coupled isolation detection circuit, light-coupled isolation detection circuit are also connected with delay trigger circuit, and delay trigger circuit is also connected with
Warning circuit.Electrical load detection of electrical leakage warning circuit of the present invention using photo-coupler realize object to be detected and detection circuit it
Between electrical isolation, form monostable circuit secondly by 555 timer chips, the work amplified in conjunction with speech chip and triode
To make principle, realizes the detection warning function to electric leakage object, power supply uses portable charged design, is convenient for carrying use,
This circuit structure is simple simultaneously, component is few, and cost of manufacture is relatively low.
Above-mentioned patent document realizes the detection warning function to electric leakage object, but for how to provide a kind of detect just
Victory, security performance is higher, and more accurately power circuit payload security detection system lacks technical solution for detection.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of power circuit payload security detection systems, for solving
How to provide it is a kind of detection it is convenient, security performance is higher, detection more accurately power circuit payload security detection system the problem of.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of power circuit payload security detection system, it is characterised in that：Including load current detection circuit, integrated alarm
Circuit, communication system and central processing system, the load current detection circuit in power supply and are born using series connection sample resistance Rs
Between load, voltage drop will be generated when load current IL flows through Rs, this voltage drop reflects load current variation.By voltage drop on Rs
It as input voltage, is exported after INA337 amplifies, for detecting the payload security situation of power circuit, the integrated alarm
After the current-limiting resistor of circuit connects resistance in circuit, the resistance value of resistor is fixed usually two pins, it can be limited
System passes through the size of current on its institute's chord road, is used for comprehensive detection drain conditions, the signal that the central processing system will test
Pass through the communications system transmission to remote control terminal or cloud platform.
Preferably, left end and in Three-hole socket XS hanging the earth terminals phase of the integrated alarm circuit due to R1
It connects, therefore warning circuit, without working power, light emitting diode VD2 does not shine, and B is noiseless.Once the circuit electrical appliance of body leakage connects
Enter Three-hole socket XS, leakage current will pass through the phase string holes of XS, the metal shell of circuit electrical appliance, the earth string holes of XS, report
Alert circuit and grid zero line constitute circuit.After leakage current is by R1 current limliting, VD1 halfwave rectifier, light VD2.
Preferably, leakage current is by VD3 pressure stabilizing, and at its both ends, output 5V DC voltage makes A and R2 structure after C is filtered
At the work of simulation acoustic generator, B issues police whistle sound, user reminded to power off and repairs in time to electric appliance.
Preferably, the communication system uses C8051F020 as microcontroller, includes the CPU core of CIP-51, has
The nonvolatile memory of 64kB in-chip FLASH program storage, 128B, including：8 groups of ports I/O, A/D and D/A converter,
Interrupt source, supports JTAG debugging function at enhanced UART, can satisfy the control requirement of single printing machine.
Preferably, the chip selection of the agreement of the communication system encapsulates the SPC3 of PROFIBUS-DP agreement, maximum
Transmission rate is 12Mbps, can detect transmission rate in bus automatically, and inside has the dual port RAM of 1.5K byte, the SPC3
It works normally from being initialised to, is controlled by state machine that chip interior integrates, support all 8 bit processing machines and microprocessor.
Preferably, the communication system operating voltage is direct current 24V, and input interface circuit is contact common source type, Duo Gekai
The common end of pass is connected to the anode of 24V power supply, and after closing the switch, electric current flows into DI optocoupler interface from switch, through light-coupled isolation
It is followed by the input port into microcontroller, output interface is for controlling various status indicator lamps and solenoid directional control valve, operating voltage
It is direct current 24V.
(3) beneficial effect
Integrated alarm circuit of the invention two kinds of sending sound, light alarm signals, prompting user can power off progress automatically in time
Maintenance, the alarm current of leakage-current alarm circuit is less than 0.4mA, small far below the earth leakage protective device desired action current of national regulation
In the requirement of 30mA, using more accurate convenient, communication system uses SOC chip, largely reduces peripheral first device
The quantity of part, so that the cabling between reducing component, is conducive to the reliability and stability for improving I/O slave station, output interface
Also photoelectrical coupler TLP512 is used, microcontroller C8051F020 output port and the load at scene is completely isolated.It is exporting
After channel and photoelectric isolating circuit, also enhance the driving capability of output interface, signal using output driving chip UDN2981
Transmission is more quick, has very strong creativeness.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is load current detection circuit schematic diagram of the invention；
Fig. 2 is integrated alarm circuit diagram of the invention；
Fig. 3 is communication system principle block diagram of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of power circuit payload security detection system, including load current detection circuit, integrated alarm circuit, communication system
System and central processing system, load current detection circuit as shown in Figure 1 is using series connection sample resistance Rs in power supply and load
Between, voltage drop will be generated when load current IL flows through Rs, this voltage drop reflects load current variation.Using voltage drop on Rs as
Input voltage exports after INA337 amplifies, for detecting the payload security situation of power circuit, the integrated alarm circuit
Current-limiting resistor resistance is connect in circuit after, it is usually two pins that the resistance value of resistor, which is fixed, it can limit logical
The size of current on its institute's chord road is crossed, comprehensive detection drain conditions are used for, the signal that the central processing system will test passes through
The communications system transmission is to remote control terminal or cloud platform.
The left end and the earth terminals phase hanging in Three-hole socket XS of integrated alarm circuit as shown in Figure 2 due to R1
It connects, therefore warning circuit, without working power, light emitting diode VD2 does not shine, and B is noiseless.Once the circuit electrical appliance of body leakage connects
Enter Three-hole socket XS, leakage current will pass through the phase string holes of XS, the metal shell of circuit electrical appliance, the earth string holes of XS, report
Alert circuit and grid zero line constitute circuit.After leakage current is by R1 current limliting, VD1 halfwave rectifier, light VD2.Leakage current
By VD3 pressure stabilizing, 5V DC voltage is exported at its both ends, after C is filtered, the simulation acoustic generator work for constituting A and R2, B
Police whistle sound is issued, reminds user to power off electric appliance in time and repairs.
Communication system as shown in Figure 3 uses C8051F020 as microcontroller, includes the CPU core of CIP-51, has
The nonvolatile memory of 64kB in-chip FLASH program storage, 128B, including：8 groups of ports I/O, A/D and D/A converter,
Interrupt source, supports JTAG debugging function at enhanced UART, can satisfy the control requirement of single printing machine.
The chip selection of the agreement of communication system encapsulates the SPC3 of PROFIBUS-DP agreement, and peak transfer rate is
12Mbps, can detect transmission rate in bus automatically, and inside has a dual port RAM of 1.5K byte, and the SPC3 is from being initialised to
It works normally, is controlled by state machine that chip interior integrates, support all 8 bit processing machines and microprocessor.
Communication system operating voltage is direct current 24V, and input interface circuit is contact common source type, and the common end of multiple switch connects
It is connected to the anode of 24V power supply, after closing the switch, electric current flows into DI optocoupler interface from switch, is followed by through light-coupled isolation into microcontroller
The input port of device, for output interface for controlling various status indicator lamps and solenoid directional control valve, operating voltage is direct current 24V.
Integrated alarm circuit of the invention two kinds of sending sound, light alarm signals, prompting user can power off progress automatically in time
Maintenance, the alarm current of leakage-current alarm circuit is less than 0.4mA, small far below the earth leakage protective device desired action current of national regulation
In the requirement of 30mA, using more accurate convenient, communication system uses SOC chip, largely reduces peripheral first device
The quantity of part, so that the cabling between reducing component, is conducive to the reliability and stability for improving I/O slave station, output interface
Also photoelectrical coupler TLP512 is used, microcontroller C8051F020 output port and the load at scene is completely isolated.It is exporting
After channel and photoelectric isolating circuit, also enhance the driving capability of output interface, signal using output driving chip UDN2981
Transmission is more quick, has very strong creativeness.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that：It still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of power circuit payload security detection system, it is characterised in that：Including load current detection circuit, integrated alarm electricity
Road, communication system and central processing system, the load current detection circuit is using series connection sample resistance Rs in power supply and load
Between, voltage drop will be generated when load current IL flows through Rs, this voltage drop reflects load current variation, and voltage drop on Rs is made
It for input voltage, is exported after INA337 amplifies, for detecting the payload security situation of power circuit, the integrated alarm electricity
After the current-limiting resistor on road connects resistance in circuit, the resistance value of resistor is fixed usually two pins, it can be limited
By the size of current on its institute's chord road, comprehensive detection drain conditions are used for, the signal that the central processing system will test to be logical
The communications system transmission is crossed to remote control terminal or cloud platform.
2. power circuit payload security detection system according to claim 1, it is characterised in that：The integrated alarm circuit
Since the left end of R1 connects with the earth terminals hanging in Three-hole socket XS, therefore warning circuit is without working power, light-emitting diodes
Pipe VD2 does not shine, and B is noiseless, once the circuit electrical appliance of body leakage accesses Three-hole socket XS, leakage current will pass through XS's
Phase string holes, the metal shell of circuit electrical appliance, the earth string holes of XS, warning circuit and grid zero line constitute circuit, leakage current
After R1 current limliting, VD1 halfwave rectifier, light VD2.
3. power circuit payload security detection system according to claim 2, it is characterised in that：Leakage current passes through VD3
Pressure stabilizing exports 5V DC voltage at its both ends, and after C is filtered, the simulation acoustic generator work for constituting A and R2, B issues police
Whistling comes, and reminds user to power off electric appliance in time and repairs.
4. power circuit payload security detection system according to claim 1, it is characterised in that：The communication system is used
C8051F020 includes the CPU core of CIP-51 as microcontroller, has 64kB in-chip FLASH program storage, 128B
Nonvolatile memory, including：8 groups of ports I/O, A/D and D/A converter, enhanced UART, support JTAG tune at interrupt source
Function is tried, can satisfy the control requirement of single printing machine.
5. power circuit payload security detection system according to claim 1, it is characterised in that：The association of the communication system
The chip selection of view encapsulates the SPC3 of PROFIBUS-DP agreement, and peak transfer rate 12Mbps can detect bus automatically
Upper transmission rate, inside have the dual port RAM of 1.5K byte, and the SPC3 is from normal work is initialised to, by chip interior collection
At state machine control, support all 8 bit processing machines and microprocessor.
6. power circuit payload security detection system according to claim 1, it is characterised in that：The communication system work
Voltage is direct current 24V, and input interface circuit is contact common source type, and the common end of multiple switch is connected to the anode of 24V power supply, opens
It closes after closing, electric current flows into DI optocoupler interface from switch, is followed by the input port into microcontroller, output interface through light-coupled isolation
For controlling various status indicator lamps and solenoid directional control valve, operating voltage is direct current 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810520244.0A CN108872765A (en) | 2018-05-28 | 2018-05-28 | A kind of power circuit payload security detection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810520244.0A CN108872765A (en) | 2018-05-28 | 2018-05-28 | A kind of power circuit payload security detection system |
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| CN108872765A true CN108872765A (en) | 2018-11-23 |
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| CN201810520244.0A Pending CN108872765A (en) | 2018-05-28 | 2018-05-28 | A kind of power circuit payload security detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586246A (en) * | 2019-01-23 | 2019-04-05 | 苏州引力焊业科技有限公司 | A kind of intelligent modularized protection against electric shock angle grinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109586246A (en) * | 2019-01-23 | 2019-04-05 | 苏州引力焊业科技有限公司 | A kind of intelligent modularized protection against electric shock angle grinder |
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Application publication date: 20181123 |