CN207926616U - A kind of meter bus communication circuit device - Google Patents
A kind of meter bus communication circuit device Download PDFInfo
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- CN207926616U CN207926616U CN201820176632.7U CN201820176632U CN207926616U CN 207926616 U CN207926616 U CN 207926616U CN 201820176632 U CN201820176632 U CN 201820176632U CN 207926616 U CN207926616 U CN 207926616U
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Abstract
The utility model is related to a kind of meter bus communication circuit devices, including host communication circuit and slave communicating circuit, host communication circuit includes host data transmission circuit, electric current loop power supply circuit, receiving test circuit and waveform shaping circuit, and slave communicating circuit includes filter rectifier, data receiver circuit, slave data transmission circuit and power supply circuit.By the modulation control signal on service cable, instead of traditional control cable detached and service cable and communication robust is increased substantially.It is sent using the full width voltage of modulation, the mode of electric current loop signal return, provides high communication anti-interference ability.It adapts to the various wire rods of onsite application and realizes the function of telecommunication.Cable can be laid with bus-type, tree-shaped or any ways such as star-like, greatly facilitated construction to connect up, and can prevent misconnection, simplified construction maintenance.Bus provides power management function, realizes power supply, communication and malfunction monitoring to bus.
Description
Technical field
The utility model is related to field of circuit technology, more particularly to a kind of meter bus communication circuit device.
Background technology
Two lines bus is one kind relative to four-wire system（Liang Gen supply lines, two communication lines）, by supply lines and signal
Line is combined into one, and realizes signal and power supply shares the technology of a bus.Two lines bus saves construction and cable cost, to existing
Field construction and later maintenance bring great convenience.In fire-fighting, instrument, sensor, the fields such as Industry Control are widely applied.
Typical double bus technology has M-BUS, fire-fighting bus etc..Current bus communication circuit is poor in the prevalence of data transmission stability
Defect.
Utility model content
The purpose of this utility model is that improving the above-mentioned deficiency in the presence of the prior art, a kind of meter bus master is provided
Machine circuit device, to improve the stability of data transmission.
In order to realize that above-mentioned purpose of utility model, the utility model embodiment provide following technical scheme：
A kind of meter bus communication circuit device, including host communication circuit and slave communicating circuit, wherein
Host communication circuit includes that host data transmission circuit, electric current loop power supply circuit, receiving test circuit and waveform are whole
Shape circuit, data transmission circuit issue data for realizing with direct current carrier data mode, and electric current loop power supply circuit is for loading
In low pressure to bus, receiving test circuit is used to be loaded into the judgement reception of the voltage in bus by detecting electric current loop power supply circuit
The data arrived, waveform shaping circuit adjust the wave in bus by the extra electricity of pliotron Absorption Capacitance coupling effect
Shape；
Slave communicating circuit includes filter rectifier, data receiver circuit, slave data transmission circuit and power supply circuit,
Filter rectifier is used to carry out EMS filtering with regard to rectification to bus；Data receiver circuit is used to carry out data by partial pressure mode
Acquisition, the data that slave data transmission circuit is used to complete electric current loop are sent, and power supply circuit is real by diode and storage capacitor
Existing burning voltage output.
Above-mentioned meter bus communication circuit device is detached by the modulation control signal on service cable instead of tradition
Control cable and service cable and increase substantially communication robust.It is sent using the full width voltage of modulation, electric current ring signal
The mode of passback provides high communication anti-interference ability.It adapts to the various wire rods of onsite application and realizes telecommunication
Function.Cable can be laid with bus-type, tree-shaped or any ways such as star-like, greatly facilitate construction to connect up, and can prevent mistake
Sending and receiving are given birth to, and construction maintenance is simplified.Bus provides power management function, realizes power supply, communication and malfunction monitoring to bus.
Further, in above-mentioned meter bus communication circuit device, the host data transmission circuit includes metal-oxide-semiconductor,
One triode, the anode of the drain electrode connection DC power supply of metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor connect the first triode by a resistance
Collector, the base stage of the first triode passes through a resistance and connects data emission port, the emitter ground connection of the first triode.
In this manner realize direct current carrier data mode issue data, be not necessarily to electrical isolation, not only may be implemented communication but also can be real
Now power.
Further, in above-mentioned meter bus communication circuit device, the electric current loop power supply circuit includes the integrated electricity of power supply
Road chip, the second triode, the first divider resistance and the second divider resistance, the power input connection of power IC chip
The anode of DC power supply, the ground terminal of power IC chip connect the collector of the second triode, the base of the second triode
Pole connects the ports CONM, the emitter ground connection of the second triode, and the collector of the second triode is also attached to concatenated first point
Between piezoresistance and the second divider resistance, the other end of the first divider resistance is connected to the power supply output of power IC chip
End, the other end ground connection of the second divider resistance.
Further, in above-mentioned meter bus communication circuit device, the receiving test circuit includes third transistor, number
It is connected to the power output end of power IC chip according to reception resistance and switching diode, one end of data receiver resistance,
The emitter of one end of other end connecting valve diode, third transistor is connected to the power supply output of power IC chip
End, base stage is connected to the other end of switching diode, while base stage also connects the ports SHORT, collector connection by a resistance
Receiving port.It can realize and receive data using electric current loop and detect bus short circuit situation, improve the reliability of system.
Further, in above-mentioned meter bus communication circuit device, the waveform shaping circuit includes the 4th triode, the
The base stage of five triodes, the 6th triode and the 7th triode, the 4th triode connects data emission port, collector connection
The base stage of 5th triode, and 5V voltages are connected, the collector of collector the 6th triode of connection of the 5th triode, the six or three
The source electrode of the emitter connection metal-oxide-semiconductor of pole pipe, the base stage of the 6th triode connect the 7th transistor emitter, the 7th triode
Base stage connects the ground terminal of power IC chip, the grounded collector of the 7th triode by another switching diode.
In this way power tube design, can the energy in parasitic capacitance by control the 7th opening for triode by consume,
Make waveform response faster, to improve the speed and reliability of communication.
Further, in above-mentioned meter bus communication circuit device, the filter rectifier includes the TVS pipe of 50V, two
A filter capacitor and rectifier bridge, the both ends connection electric energy end of TVS pipe, rectifier bridge in parallel with TVS pipe after two filter capacitor series connection
Negative pole end be connected between two filter capacitors, the other end of two filter capacitors is connected to the exchange end of rectifier bridge.
The TVS of 50V can filter out the interference voltage for exceeding 50V voltages in bus, protect the device in bus, two filtering
Capacitance can filter out relatively narrow spike interference, improve the anti-interference ability of system.It is electrodeless that rectifier bridge can be such that bus has
Property the characteristics of, tie-in line can be regardless of positive and negative anodes, which reduces the wiring error probability of product during the installation process, also side
The later stage debugging and maintenance.
Further, in above-mentioned meter bus communication circuit device, the data receiver circuit include data receiver port,
Concatenated first divider resistance and the second divider resistance, the positive terminal of the other end connection rectifier bridge of the first divider resistance, second
The negative pole end of the other end connection rectifier bridge of divider resistance, data receiver port are connected between two divider resistances.Pass through this
The shunting of sample can be very good the data waveform received.
Further, in above-mentioned meter bus communication circuit device, the slave data transmission circuit includes triode, bears
Resistance and data sending port are carried, the collector of triode connects one end that the first divider resistance is used to connect rectifier bridge, three poles
The emitter of pipe connects load resistance, and the base stage of triode connects data sending terminal mouth, the other end ground connection of load resistance.
Further, in above-mentioned meter bus communication circuit device, the power supply circuit includes diode and storage capacitor,
The negative pole end of the collector of the positive terminal connection triode of diode, diode connects forward voltage, and one end of storage capacitor connects
Connect the negative pole end of diode, other end ground connection.Electrically segmentation and energy storage are carried out by diode and storage capacitor, it is steady to obtain
Fixed power supply, realizes data well in this way and power supply shares the mode bus of 2 power cords.
Compared with prior art, the beneficial effects of the utility model：
1. bus can power, communicating and powering is not necessarily to electrical isolation；
2. having bus short circuit protection, short circuit removes automatic recovery bus；
3. fault-signal reporting functions；
4. supporting nonpolarity wiring；
5. communication data can reach 1KB/s；
6. no special cables requirement；
7.2 lines can be achieved with powering and communicate, and realize more low cost solution；Maximum bus voltage is up to 48V；
8. bus strong antijamming capability, can with alternating current and walk；
9. 256 equipment can be mounted simultaneously；
10. communication distance is up to 3000m；
11. supporting arbitrary topology wiring：It is tree-like, star, bus-type.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore does not answer
It is counted as the restriction to range, for those of ordinary skill in the art, without creative efforts, also
Other relevant attached drawings can be obtained according to these attached drawings.
Fig. 1 is the block diagram for the meter bus communication circuit device that the utility model embodiment provides.
Fig. 2 is the electrical schematic diagram of host communication circuit in embodiment.
Fig. 3 is the electrical schematic diagram of slave communicating circuit in embodiment.
Fig. 4 is host transmission data oscillogram.
Fig. 5 is that host receives data waveform figure.
Fig. 6 is load power-supply circuit figure.
Specific implementation mode
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, the detailed description of the embodiments of the present invention to providing in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, the every other embodiment that those skilled in the art are obtained without making creative work, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile it is new in this practicality
In the description of type, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relatively important
Property.
Referring to Fig. 1, provide a kind of meter bus communication circuit device in the present embodiment, including host communication circuit and
Slave communicating circuit, wherein host communication circuit includes host data transmission circuit 10, electric current loop power supply circuit 20, receives inspection
Slowdown monitoring circuit 30 and waveform shaping circuit 40, slave communicating circuit include filter rectifier 50, data receiver circuit 60, slave number
According to transmission circuit 70 and power supply circuit 80.
The input terminal of data transmission circuit 10 connects DC power supply, and host data transmission circuit 10 carries for realizing with direct current
Wave data mode issues data；The output end of the input terminal connection host data transmission circuit 10 of electric current loop power supply circuit 20, electricity
Stream ring power supply circuit 20 is for loading low pressure to bus；The input terminal connection electric current loop power supply circuit 20 of receiving test circuit 30
Output end, receiving test circuit 30 is used to judge to receive by detecting the voltage that electric current loop power supply circuit 20 is loaded into bus
The data arrived；The output end of the input terminal connection receiving test circuit 30 of waveform shaping circuit 40, waveform shaping circuit 40 pass through
The extra electricity of pliotron Absorption Capacitance coupling effect adjusts the waveform in bus.
One end connection electric energy end of filter rectifier 50, filter rectifier 50 are used to carry out EMS filtering just to bus
Rectification；The other end of one end connection filter rectifier 50 of data receiver circuit 60, data receiver circuit 60 are used for by dividing
Pressure mode carries out data acquisition；The other end of one end connection data receiver circuit 60 of slave data transmission circuit 70, slave number
The data for being used to complete electric current loop according to transmission circuit 70 are sent；Power supply circuit 80 connects the another of slave data transmission circuit 70
End, power supply circuit 80 realize that burning voltage exports by diode and storage capacitor.
Referring to Fig. 2, in host communication circuit, VIN+, VIN- are power input, and VOUT+, VOUT- export for power supply,
TDATA is transmission data signal, and CONM is current loop control signal, and RX is data reception signal, and SHOORT believes for short-circuit detecting
Number.
Specifically, host data transmission circuit 10 includes metal-oxide-semiconductor Q8, the first triode Q2, and the drain electrode connection of metal-oxide-semiconductor Q8 is straight
The drain electrode of the positive VIN+ in galvanic electricity source, metal-oxide-semiconductor Q8 pass through the collector of resistance R5 the first triodes of connection Q2, the one or three pole
The base stage of pipe Q2 is grounded by the emitter of resistance R9 connection data emission ports a T_DATA, the first triode Q2.
By the control to the ports T_DATA, turning on and off for Q2 triodes is realized, to realize to Q8 metal-oxide-semiconductors
The data of T_DATA are loaded into the power supply of power supply up, to make the power supply electricity in bus by control by the switch of metal-oxide-semiconductor
The plain existing level with data waveform, and high level part therein is realized and provides work capacity to slave.Bus is with 1ms for 1
A period will send out the high level of the low level+0.8ms of 0.2ms if no data issues in a cycle；If one
Period has data distributing will be in 1ms specifically to encode transmission data.And data are in unit period（0.1ms）It is all
The level of high level is defined as " 1 " in binary system, to there is rising edge to be defined as " 0 " in binary system in unit period, this
Sample can send downwards communication data, and transmission data oscillogram is as shown in Figure 4.Thus it can also be seen that being issuing data
When " 1 ", systems stay is to externally fed, and when data are " 0 ", system also has half the time that can continue output power supply, thus
It can realize that energy exports to greatest extent.It can be seen that the bus can provide enough electric energy, communication can be also realized, and
The two is combined into one, and is not necessarily to electrical isolation.
Referring to Fig. 2, in the present embodiment, the electric current loop power supply circuit 20 includes that power IC chip U1 (is used
LM317 chips), the second triode Q3, the first divider resistance R2 and the second divider resistance R6, the electricity of power IC chip U1
The anode of source input terminal connection DC power supply, the ground terminal of power IC chip U1 connect the current collection of the second triode Q3
Pole, the ports base stage connection CONM of the second triode Q3, the emitter ground connection of the second triode Q3, the current collection of the second triode Q3
Pole is also attached between concatenated first divider resistance R2 and the second divider resistance R6, the other end connection of the first divider resistance R2
It is grounded in the other end of the power output end of power IC chip U1, the second divider resistance R6.
By two electric resistance partial pressures of R2, R6 to LM317（U1）Reference voltage, then the control by the ports CONM to Q3 are provided
It realizes the control to reference voltage, the voltage change of A points may be implemented, when the ports CONM are high level, the voltage of A points is
1.25V, when the ports CONM are low level, A points are 8V or so.When T_DATA transmission datas, the waveform and T_DATA of CONM
On the contrary, when T_DATA no datas issue, CONM is low level.The effect of electric current loop power supply circuit 20 in bus mainly not having
There is the low level of that 0.2ms when hair data to draw high 8V or so, and transmission data part is without influence, this is done to can be
Electric current loop data transmission is realized in periodical 0.2ms low levels, that is, is prepared for the part of bus reception data.
Referring to Fig. 2, in the present embodiment, the receiving test circuit 30 includes third transistor Q1, data receiver resistance
One end of R1 and switching diode D1, data receiver resistance R1 are connected to the power output end of power IC chip U1, separately
One end of one end connecting valve diode D1, the emitter of third transistor Q1 are connected to the power supply of power IC chip U1
Output end, base stage is connected to the other end of switching diode D1, while base stage also connects the ports SHORT, current collection by a resistance
Pole connects receiving port.
By R1, D1, Q1, these three components realize that the data receiver of electric current loop section is handled, when slave is periodically being
When generating the electric current with data on the 8V level of 0.2ms, this electric current can generate voltage difference between 1 and 3 feet of R1 and D1,
Be exactly the voltage ratio A points of B points in Fig. 1 voltage it is low, this makes it possible to make Q1 be connected, to there is corresponding level on C points
Waveform can thus obtain the data information of C points, and to obtain the data sent out on slave, here it is the data receivers of electric current loop
Principle.And between bus level is the high period of 24V, the voltage of A points is always 8V, and B points can also be maintained at 5V to power on
Pressure, if during this period of time short circuit occurs in bus, the voltage of B points will appear bust, directly drop to 1V once, thus can
The case where there is level change, can detect bus short circuit in the ports SHORT.
Referring to Fig. 2, in the present embodiment, the waveform shaping circuit 40 include the 4th triode Q7, the 5th triode Q6,
The base stage of 6th triode Q9 and the 7th triode Q10, the 4th triode Q7 connect data emission port T_DATA, collector
The base stage of the 5th triode Q6 is connected, and connects 5V voltages, the collector of the 5th triode Q6 connects the collection of the 6th triode Q9
Electrode, the source electrode of the emitter connection metal-oxide-semiconductor of the 6th triode Q9, the base stage of the 6th triode Q9 connect the 7th triode Q10
Emitter, the ground connection that the base stage of the 7th triode Q10 passes through another switching diode D2 connection power IC chips U1
End, the grounded collector of the 7th triode Q10.
It is influenced by circuit parasitic capacitance in bus level change procedure, after Q8 shutdowns, bus voltage will not be fast
Speed reduces, and thus affects the reliability of communication, the energy in parasitic capacitance can be passed through control by waveform shaping circuit 40
Opening for Q10 and consume, make waveform response faster, to improve the speed and reliability of communication.
Referring to Fig. 3, in slave communicating circuit, power+, power- are bus input, and SLAVE_RX is from receiving
Signal, SLAVE_TX are the signal that slave is sent.
Specifically, the filter rectifier 50 includes the TVS pipe D5, two filter capacitors C4, C6 and rectifier bridge of 50V
D4, TVS pipe use SMBJ50CA, and rectifier bridge uses MB6S, the both ends connection electric energy end of TVS pipe, after C4, C6 series connection with TVS pipe
The negative pole end of parallel connection, rectifier bridge is connected between C4, C6, and the other end of C4 is connected to an exchange end of rectifier bridge, and C6's is another
One end is connected to another exchange end of rectifier bridge.D5 is the TVS pipe that voltage is 50V, can filter out and exceed 50V voltages in bus
Interference voltage, protect the device in bus, C4, C6 that can filter out relatively narrow spike interference, improve the anti-interference of system
Ability.D4 is rectifier bridge, bus can be made to have the characteristics that non-polar, tie-in line can part positive and negative anodes, which reduces
The wiring error probability of product during the installation process, has been also convenient for the debugging and maintenance in later stage.
Referring to Fig. 3, in the present embodiment, the data receiver circuit 60 includes data receiver port SLAVE_RX, first
Divider resistance R34 and the second divider resistance R36, resistance R34 are connected with R36, and the other end of the first divider resistance R34 connects rectification
The positive terminal of bridge, and forward voltage is connected, the negative pole end of the other end connection rectifier bridge of the second divider resistance R36, and be grounded, number
It is connected between resistance R34 and R36 according to receiving port SLAVE_RX.
Slave transmission data then needs the cooperation of host, and one can be issued by the set time when host does not issue data
The level of the 8V of a 0.2ms, this level can be detected again by R34, R36 partial pressure, if this low level is more than
0.1ms does not change, and illustrates that host does not issue data herein, at this moment slave can by SLAVE_TX transmission datas,
Slave is low level when sending 1, and SLAVE_TX is high level when sending 0, the electric current in bus can be drawn by R43, at this moment host
Certain voltage can be assigned at partial R1, A point voltages is made to be higher than B points, to open Q1 triodes, got on R11 certain
Voltage（C points）, as shown in Figure 5.Again by waveform shaping circuit shaping, to obtain the data of RX.
Referring to Fig. 3, in the present embodiment, slave data transmission circuit 70 includes triode Q11, load resistance R43 sum numbers
According to sending port SLAVE_TX, the collector of triode Q11 connects one end that the first divider resistance R34 is used to connect rectifier bridge,
The emitter of triode Q11 connects load resistance R43, and the base stage of triode Q11 connects data sending terminal mouth SLAVE_TX, load
The other end of resistance R43 is grounded.When host issues the periodic 8V of 0.2ms compared with low level, the transmission of slave data passes through
The break-make of SLAVE_TX port controlling triodes Q11, in controlling bus by electric current, allow host can be by detecting electricity
The mode of stream obtains data.But since the low level time of periodical 0.2ms is too short, so being sent in Host Detection to slave
Just need the 8V level of this 0.2ms temporarily to reach the 8V level of 0.5ms when the one or two binary data of data, so
It can make slave that the data of one byte are sent with the baud rate of 38400bit complete.
Referring to Fig. 3, in the present embodiment, the power supply circuit 80 includes diode D3 and storage capacitor C5, diode D3
Positive terminal connection triode Q11 collector, the negative pole end of diode D3 connects 24V forward voltages, the one of storage capacitor C5
The negative pole end of end connection diode D3, other end ground connection.When filter rectifier 10, data receiver circuit 20, data send electricity
Road 30 is after the sending and receiving and be put into bus of data, and the voltage of bus is unstable, here by the diode on slave
D3, storage capacitor C5 carry out electrically segmentation and energy storage, and the power supply to be stablized realizes that data and power supply share 2 electricity
The mode bus of source line.
Due to there is electric current loop communication in bus at any time, so cannot connect normal load in bus, not so can begin electric current
Ring communication failures, it is also possible to so that Host Detection is carried out protection act to short circuit, if to take electricity from bus, total non-2 bus
Equipment uses, and non-2 bus apparatus load can be connected according to mode shown in Fig. 6 takes electricity.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.
Claims (9)
1. a kind of meter bus communication circuit device, which is characterized in that including host communication circuit and slave communicating circuit,
In,
Host communication circuit includes host data transmission circuit, electric current loop power supply circuit, receiving test circuit and waveform shaping electricity
Road, data transmission circuit issue data for realizing with direct current carrier data mode, and electric current loop power supply circuit is for loading low pressure
Onto bus, receiving test circuit is used to be loaded into what the judgement of the voltage in bus received by detecting electric current loop power supply circuit
Data, waveform shaping circuit adjust the waveform in bus by the extra electricity of pliotron Absorption Capacitance coupling effect；
Slave communicating circuit includes filter rectifier, data receiver circuit, slave data transmission circuit and power supply circuit, filtering
Rectification circuit is used to carry out EMS filtering with regard to rectification to bus；Data receiver circuit is used to carry out data acquisition by partial pressure mode,
The data that slave data transmission circuit is used to complete electric current loop are sent, and power supply circuit is realized by diode and storage capacitor to be stablized
Voltage output.
2. meter bus communication circuit device according to claim 1, which is characterized in that the host data transmission circuit
Including metal-oxide-semiconductor, the first triode, the anode of the drain electrode connection DC power supply of metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor is connected by a resistance
The collector of the first triode is connect, the base stage of the first triode connects data emission port, the first triode by a resistance
Emitter ground connection.
3. meter bus communication circuit device according to claim 2, which is characterized in that the electric current loop power supply circuit packet
Include power IC chip, the second triode, the first divider resistance and the second divider resistance, the electricity of power IC chip
The anode of source input terminal connection DC power supply, the ground terminal of power IC chip connect the collector of the second triode, the
The ports base stage connection CONM of two triodes, the emitter ground connection of the second triode, the collector of the second triode are also attached to
Between concatenated first divider resistance and the second divider resistance, the other end of the first divider resistance is connected to power IC core
The power output end of piece, the other end ground connection of the second divider resistance.
4. meter bus communication circuit device according to claim 3, which is characterized in that the receiving test circuit includes
One end of third transistor, data receiver resistance and switching diode, data receiver resistance is connected to power IC chip
Power output end, one end of other end connecting valve diode, the emitter of third transistor is connected to power IC
The power output end of chip, base stage is connected to the other end of switching diode, while base stage also connects the ends SHORT by a resistance
Mouthful, collector connects receiving port.
5. meter bus communication circuit device according to claim 4, which is characterized in that the waveform shaping circuit includes
The base stage of 4th triode, the 5th triode, the 6th triode and the 7th triode, the 4th triode connects data transmitting terminal
Mouthful, collector connects the base stage of the 5th triode, and connects 5V voltages, and the collector of the 5th triode connects the 6th triode
Collector, the source electrode of the emitter connection metal-oxide-semiconductor of the 6th triode, the base stage of the 6th triode connects the 7th triode emission
Pole, the base stage of the 7th triode connect the ground terminal of power IC chip, the seven or three pole by another switching diode
The grounded collector of pipe.
6. meter bus communication circuit device according to claim 1, which is characterized in that the filter rectifier includes
The TVS pipe of 50V, two filter capacitors and rectifier bridge, the both ends connection electric energy end of TVS pipe, after two filter capacitors series connection with TVS
Pipe is in parallel, and the negative pole end of rectifier bridge is connected between two filter capacitors, and the other ends of two filter capacitors is connected to whole
Flow the exchange end of bridge.
7. meter bus communication circuit device according to claim 6, which is characterized in that the data receiver circuit includes
The other end of data receiver port, concatenated first divider resistance and the second divider resistance, the first divider resistance connects rectifier bridge
Positive terminal, the second divider resistance the other end connection rectifier bridge negative pole end, data receiver port be connected to two partial pressure electricity
Between resistance.
8. meter bus communication circuit device according to claim 7, which is characterized in that the slave data transmission circuit
Including triode, load resistance and data sending port, the collector of triode connects the first divider resistance for connecting rectification
One end of bridge, the emitter of triode connect load resistance, and the base stage of triode connects data sending terminal mouth, load resistance it is another
One end is grounded.
9. meter bus communication circuit device according to claim 8, which is characterized in that the power supply circuit includes described
Diode and the storage capacitor, the collector of the positive terminal connection triode of diode, the negative pole end connection of diode are positive
Voltage, the negative pole end of one end connection diode of storage capacitor, other end ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820176632.7U CN207926616U (en) | 2018-02-01 | 2018-02-01 | A kind of meter bus communication circuit device |
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| CN201820176632.7U CN207926616U (en) | 2018-02-01 | 2018-02-01 | A kind of meter bus communication circuit device |
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| CN201820176632.7U Expired - Fee Related CN207926616U (en) | 2018-02-01 | 2018-02-01 | A kind of meter bus communication circuit device |
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| CN109525115A (en) * | 2018-12-21 | 2019-03-26 | 厦门固立电子科技有限公司 | A kind of communication based on intelligent medical device end is for electro synthesis and separation system |
| CN110535618A (en) * | 2019-10-11 | 2019-12-03 | 深圳市中安利业科技技术有限公司 | Two wires half duplex communication circuit and its means of communication with power supply |
| CN112543130A (en) * | 2020-12-11 | 2021-03-23 | 柯提斯电气(杭州)有限公司 | Intelligent communication detection system and communication method thereof |
| CN113644507A (en) * | 2021-08-11 | 2021-11-12 | 重庆创迪科技发展有限公司 | Low-voltage direct-current equipment power supply connecting device with communication function |
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2018
- 2018-02-01 CN CN201820176632.7U patent/CN207926616U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109360403A (en) * | 2018-10-31 | 2019-02-19 | 厦门拓宝科技有限公司 | A kind of Novel limousine water level sensor communicating circuit based on solid conductor |
| CN109360403B (en) * | 2018-10-31 | 2024-02-06 | 厦门拓宝科技有限公司 | Caravan water level sensor communication circuit based on single wire |
| CN109525115A (en) * | 2018-12-21 | 2019-03-26 | 厦门固立电子科技有限公司 | A kind of communication based on intelligent medical device end is for electro synthesis and separation system |
| CN110535618A (en) * | 2019-10-11 | 2019-12-03 | 深圳市中安利业科技技术有限公司 | Two wires half duplex communication circuit and its means of communication with power supply |
| CN112543130A (en) * | 2020-12-11 | 2021-03-23 | 柯提斯电气(杭州)有限公司 | Intelligent communication detection system and communication method thereof |
| CN112543130B (en) * | 2020-12-11 | 2021-08-06 | 柯提斯电气(杭州)有限公司 | Intelligent communication detection system and communication method thereof |
| CN113644507A (en) * | 2021-08-11 | 2021-11-12 | 重庆创迪科技发展有限公司 | Low-voltage direct-current equipment power supply connecting device with communication function |
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