CN109828448A - A kind of isolation switch device having more board information monitorings - Google Patents
A kind of isolation switch device having more board information monitorings Download PDFInfo
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- CN109828448A CN109828448A CN201811629618.9A CN201811629618A CN109828448A CN 109828448 A CN109828448 A CN 109828448A CN 201811629618 A CN201811629618 A CN 201811629618A CN 109828448 A CN109828448 A CN 109828448A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 46
- 238000002955 isolation Methods 0.000 title claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 18
- 238000004088 simulation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
A kind of isolation switch device having more board information monitorings, including controller connect Acquisition Circuit, the disconnecting switch outside Acquisition Circuit connection on controller；Controller connects external equipment by CAN communication module；Controller connects multicircuit relay by control relay circuit, and the normally opened contact output of relay disconnects empty node signal, and normally-closed contact output is closed empty node signal.1 path switching signal can be converted to variable connector signal by apparatus of the present invention, and export normally opened node respectively and normally closed node, application range are wider.
Description
Technical field
The present invention relates to information monitoring field more particularly to a kind of isolation switch devices for having more board information monitorings.
Background technique
During electronic device works, the working condition for grasping each section inside equipment in real time, such as each section are generally required
The essential informations such as temperature, each module dissipation.Under normal circumstances, each section designs monitoring CPU, and it is onboard basic respectively to monitor oneself
Then information is aggregated into equipment main control part by communication bus again, reaches the mesh of real-time monitoring system working condition by information
's.
In addition there are some equipment, and the monitoring chip of some included 1-wire bus interface is only respectively welded at each portion
On parallel circuit plate, each section information is then obtained by 1-wire bus respectively by main control part CPU.
Therefore, the prior art has the disadvantage in that (1) multiple CPU schemes, not only increases software code workload, later period
Code maintenance task amount also adds whole hardware cost；(2) master cpu is directly simulated 1-wire bus by pin and is obtained
Each section monitoring information because emulation bus rate is lower, and needs a large amount of waiting delays to will increase CPU when more from equipment
Acquisition time reduces CPU working efficiency；(3) 1-wire bus requires read-write sequence more stringent, write to software code,
Debugging is brought a lot of trouble.
Summary of the invention
The present invention provides a kind of isolation switch device for being able to carry out more board information monitorings, to solve prior art presence
The problem of.
The invention adopts the following technical scheme:
A kind of isolation switch device having more board information monitorings,
Including controller；
Acquisition Circuit, the disconnecting switch outside Acquisition Circuit connection are connected on controller；
Controller connects external equipment by CAN communication module；
Controller connects multicircuit relay by control relay circuit, and the normally opened contact output of relay disconnects empty node letter
Number, normally-closed contact output is closed empty node signal.
The CAN communication module includes the CAN transceiver of two-way redundancy setting connected to the controller, two-way CAN transmitting-receiving
Device passes through an isolating chip connection respectively, and CAN bus, two-way CAN bus connect external equipment simultaneously all the way.
Controller upper junction plate information carrying ceases monitoring modular, and the onboard information monitoring module includes onboard power supply detection
Module, onboard power supply detection module connect Multi-channel monitoring circuit by I2C bus, and the observation circuit includes being arranged in quilt
Power detecting chip in monitoring object.
The onboard information monitoring module further includes onboard temperature sensing circuit and ID detection circuit.
The controller passes through I2C bus connects I2C turns 1-wire chip, passes through I2C turns 1-wire chip connection 1-wire
Bus.
The controller connects Acquisition Circuit by external interrupt pin.
The Acquisition Circuit includes level shifting circuit.
Beneficial effects of the present invention:
(1) 1 path switching signal can be converted to variable connector signal by device, and export normally opened node and normally closed node respectively,
Application range is wider.
(2) the included Hardware I of controller2C bus speed will be adopted much higher than the 1-wire bus speed of I/O port simulation, device
Use I2C bus turns 1-wire bus and carries out onboard information monitoring, and CPU collection plate is greatly saved and carries information time.
(3) device uses I2C bus turns 1-wire bus and carries out onboard information monitoring, and controller programming does not have to consider to require
Stringent 1-wire bus timing problem, reduces the workload of software programming, debugging.
(4) device uses I2C bus turns 1-wire bus and carries out onboard information monitoring, waits when 1-wire bus acquires
When, controller is not necessarily to while waiting, and can carry out other operations, improve CPU treatment effeciency.
Detailed description of the invention
Fig. 1 is the isolation switch device scheme schematic diagram of more board information monitorings.
Fig. 2 is I2C bus turns 1-wire bus schematic diagram.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
The present invention provides a kind of isolation switch device for having more board information monitorings, which may be designed as plug-in unit shape
Formula, it is easy to installation and maintenance, as shown in Figure 1, include controller, the Acquisition Circuit of connection acquisition disconnecting switch signal on controller,
Disconnecting switch signal imitation circuit, the CAN communication module that is communicated with external equipment, on controller can also connecting detection its
The onboard information monitoring module of its board information.
Controller can choose CPU or other control centres, and controller can acquire external signal or output signal
External circuit work is controlled, can also be communicated by communication bus with external module, data transmit-receive is carried out.
The Acquisition Circuit of disconnecting switch signal, refer to isolation switch device can acquire in real time external DC24V level every
Leave OFF signal.Acquisition Circuit is mainly made of level shifting circuit, and DC24V level conversion can be by level shifting circuit
DC3.3V level.When be manually operated disconnecting switch arrive " closed " gear when, switch normally opened contact be closed, export a DC24V's
High level signal；When be manually operated disconnecting switch arrive "off" gear when, switch normally opened contact disconnection, export the low electricity of a 0V
Ordinary mail number；To avoid being unable to real-time response, controller external interrupt pin acquisition disconnecting switch signal can be used.
Disconnecting switch signal imitation circuit can root after referring to that isolation switch device collects 1 tunnel disconnecting switch gear signal
According to gear difference, the normally opened empty node signal of simulation output multichannel, the normally closed empty node signal of multichannel.Embodiment as shown in Figure 1
In, can the normally opened empty node signal in 11 tunnel of simulation output, the normally closed empty node signal in 11 tunnels, signal imitation circuit is mainly by 11 at this time
The relay of a double-pole double throw sky node forms, and controller connects control relay by control relay circuit.Work as controller
When detecting the "off" gear of disconnecting switch, low level control relay drive circuit is exported, all relay coils lose
Electricity, opened point disconnect, normally closed point closure, the normally opened empty node signal in 11 tunnels of output, the normally closed empty node signal in 11 tunnels；When controller is examined
When measuring disconnecting switch " closed " gear, output high level control relay drive circuit, all relay coils it is electric, often
Closure is prescribed, normally closed point disconnects, and 11 tunnels of output are closed empty node signal, 11 tunnels disconnect empty node signal.
Foregoing circuit of the invention can be realized the purpose that a path switching signal is converted to variable connector signal, Neng Gou
When multiple equipment is required to connection disconnecting switch, receives the identical signal of disconnecting switch, by expansion switch signal, it will open all the way
OFF signal is extended to multichannel and is transmitted directly to other equipment, and multiple equipment is avoided to connect disconnecting switch, which can especially apply
In cabinet inside, when multiple boards are required to receive the opening and closing signal of disconnecting switch, disconnecting switch plug-in unit through the invention
Multiple boards are connected, make multiple boards that can receive identical disconnecting switch signal simultaneously.Present invention embodiment as shown in Figure 1
In, 11 tunnel disconnecting switch signals can be simulated, therefore can at most connect 11 equipment for needing to receive same separation switching signal.
Controller of the invention connects external equipment by CAN communication module, and CAN communication module is arranged comprising two-way redundancy
CAN transceiver and two-way redundant CAN bus is isolated, two-way CAN transceiver passes through isolating chip connection CAN all the way respectively
Bus, two-way CAN bus connect external equipment simultaneously, are communicated with external equipment, and controller can be received by CAN bus
External command information, while the monitoring information inside equipment is transferred to other equipment.
Controller of the invention can connect multiple monitoring devices by bus, should for monitoring the information of distinct device
Setting be particularly applicable in the case where monitored equipment is without master controller, such as same cabinet, some boards without controller, but
It is and the information such as the information to these boards, such as temperature, voltage is needed to be monitored, can be inserted at this time by this disconnecting switch
The controller of part connects multiple monitoring devices, obtain the detection information of monitoring device and by CAN communication module transfer out into
Row monitoring.
Specifically, controller upper junction plate information carrying of the invention ceases monitoring modular, and onboard information monitoring module includes plate
Power supply detection module is carried, onboard power supply detection module passes through I2C bus connects Multi-channel monitoring circuit, observation circuit packet
Include the power detecting chip being arranged on monitored target.Onboard information monitoring module further includes carrying out temperature to monitored target
The onboard temperature sensing circuit of detection and the ID detection circuit that ID detection is carried out to monitored target, onboard information monitoring module master
Real-time monitoring is carried out to the working condition of each section in equipment if realizing, can be judged accurately and in time when a failure occurs it
It is out of order position.
Onboard power supply monitoring refers mainly to the operating voltage to board each in equipment or each module, electric current is supervised in real time
It surveys.In embodiment as shown in Figure 1, observation circuit is by I2The realization of C bus, every I2It can hang what multiple needs detected in C bus
Board or equipment or module, wherein isolation switch device is as host, other monitored targets are as slave, each slave root
According to I2The address C distinguishes.The source of welding current monitors chip on each slave, and Linear company may be selected and have I2C bus interface
LTC2945 or LTC2991 power supply monitoring chip, isolation switch device can pass through I2C bus reads the power supply electricity of each board respectively
Pressure, size of current, grasp in real time each section operating power and power supply whether failure situations such as.
Onboard temperature sensing circuit, ID detection circuit are mainly to the circuit board temperature of board each in equipment or each module, hard
Part ID sequence number carries out real-time monitoring.Circuit board temperature refers mainly to environment temperature when circuit board work around chip, can pass through
Temperature sensor detection, circuit board hardware ID sequence number refer mainly to every piece of circuit board and possess oneself unique hardware ID number, can make
For identity documents, the later period is facilitated to track.
Onboard temperature sensing circuit, ID detection circuit are realized that 1-wire bus is mono signal bus, number by 1-wire bus
It is transmitted according to clock by same root signal wire, more than ten boards can be hung in every 1-wire bus, wherein disconnecting switch fills
It sets as host, as slave, each slave distinguishes other monitored boards according to board ID sequence number.It is welded on each slave
Onboard information chip, optional MAXIM company have the MAX31826 chip of 1-wire bus interface, both can be used as temperature biography
Sensor uses, and contains unique ID sequence number.Isolation switch device can read respectively test object (as respectively by 1-wire bus
Board) temperature, ID sequence number, grasp each section operating temperature and each component in real time and form situation.
Due to when controller directly adopt I/O port simulation 1-wire bus when, because 1-wire bus data, clock share one
Root signal wire, and data and clock are both needed to simulate by bit, traffic rate is lower.When slave quantity is more, host can only be waited
After currently all obtaining from machine information, next-step operation just can be carried out, it is whole to spend the time longer, reduce the work effect of CPU
Rate.And because 1-wire bus is more stringent to timing requirements, the level duration of each step need to be adjusted accurately, and workload is very
Greatly.
When the controller of isolation switch device of the invention carries out onboard temperature detection, ID detection, pass through I2C bus turns 1-
Then wire bus obtains each board monitoring information again.Hardware I is carried inside controller2C bus control unit, operating rate compared with
Fastly, the 1-wire bus timing after in addition converting is adjusted without CPU, but is automatically performed by conversion chip.When conversion core
Piece is by I2When C bus message is converted to 1-wire bus message, CPU can carry out other operations, wait without original place, mention significantly
The high working efficiency of CPU.
I2C bus, which turns 1-wire bus chip, may be selected the DS2484R+T chip of MAXIM company, and it is total to can be used as 1-wire
Line host, one end pass through I2C bus interface is connect with controller, and other end exports 1-wire bus, other devices in equipment
Or board or module device are hung over above bus as slave.
Above-mentioned I2It is 1-wire bus that other existing interface type general line systems, which can be used, in C bus, is not changing it
In the case where its structure, function of the invention equally can be realized.
In the description of this specification, particular features, structures, materials, or characteristics can be real in any one or more
Applying can be combined in any suitable manner in example or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those skilled in the art the invention discloses in the range of, the variation or replacement that can be readily occurred in should all be covered
Within the scope of the present invention.
Claims (7)
1. a kind of isolation switch device for having more board information monitorings, it is characterised in that:
Including controller；
Acquisition Circuit, the disconnecting switch outside Acquisition Circuit connection are connected on controller；
Controller connects external equipment by CAN communication module；
Controller connects multicircuit relay by control relay circuit, and the normally opened contact output of relay disconnects empty node letter
Number, normally-closed contact output is closed empty node signal.
2. a kind of isolation switch device for having more board information monitorings according to claim 1, it is characterised in that:
The CAN communication module includes the CAN transceiver of two-way redundancy setting connected to the controller, two-way CAN transceiver point
Not Tong Guo the connection of isolating chip CAN bus, two-way CAN bus connect external equipment simultaneously all the way.
3. a kind of isolation switch device for having more board information monitorings according to claim 1, it is characterised in that:
Controller upper junction plate information carrying ceases monitoring modular, and the onboard information monitoring module includes onboard power supply detection mould
Block, onboard power supply detection module pass through I2C bus connects Multi-channel monitoring circuit, and the observation circuit includes that setting is being supervised
Survey the power detecting chip on object.
4. a kind of isolation switch device for having more board information monitorings according to claim 3, it is characterised in that:
The onboard information monitoring module further includes onboard temperature sensing circuit and ID detection circuit.
5. a kind of isolation switch device for having more board information monitorings according to claim 3, it is characterised in that:
The controller passes through I2C bus connects I2C turns 1-wire chip, passes through I2It is total that C turns 1-wire chip connection 1-wire
Line.
6. a kind of isolation switch device for having more board information monitorings according to claim 1, it is characterised in that:
The controller connects Acquisition Circuit by external interrupt pin.
7. a kind of isolation switch device for having more board information monitorings according to claim 1, it is characterised in that:
The Acquisition Circuit includes level shifting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811629618.9A CN109828448A (en) | 2018-12-28 | 2018-12-28 | A kind of isolation switch device having more board information monitorings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811629618.9A CN109828448A (en) | 2018-12-28 | 2018-12-28 | A kind of isolation switch device having more board information monitorings |
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| Publication Number | Publication Date |
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| CN109828448A true CN109828448A (en) | 2019-05-31 |
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| CN201811629618.9A Pending CN109828448A (en) | 2018-12-28 | 2018-12-28 | A kind of isolation switch device having more board information monitorings |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110799007A (en) * | 2019-10-31 | 2020-02-14 | 河南思维轨道交通技术研究院有限公司 | Industrial personal computer and communication protection method thereof |
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