CN203149372U - Digital intelligent M-bus concentrator based on single-chip microcomputer control - Google Patents
Digital intelligent M-bus concentrator based on single-chip microcomputer control Download PDFInfo
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- CN203149372U CN203149372U CN 201320115725 CN201320115725U CN203149372U CN 203149372 U CN203149372 U CN 203149372U CN 201320115725 CN201320115725 CN 201320115725 CN 201320115725 U CN201320115725 U CN 201320115725U CN 203149372 U CN203149372 U CN 203149372U
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Abstract
A digital intelligent M-bus concentrator based on the control of a single-chip microcomputer comprises a receiving module, a sending module interface circuit, a sending module and a power supply circuit. The sending module interface circuit is communicated with a remote control host and receives control signals of the host. The control signal output end of the sending module interface circuit is connected with the control signal input end of the sending module. The sending module is connected with various instrumental devices. The receiving module is connected with a series resistor of a load and acquires voltage change signals on the series resistor. The voltage change is caused by the current change of the load. The receiving module further converts the voltage change signals into TTL signals. The signal output of the receiving module is sent back to the control host through the sending module interface circuit. By using an Mbus to connect various instruments, the digital intelligent M-bus concentrator can make wiring and connection of energy consumption intelligentized management systems such as residence communities and offices significantly simplified. Furthermore, the digital intelligent M-bus concentrator has the characteristics of simple structure, low cost and high reliability.
Description
Technical field
The utility model relates to instrument energy consumption monitoring field, especially MBus is used for the energy consumption class intelligent management system of all kinds of instrument or relevant apparatus, and is specifically a kind of based on monolithic processor controlled digital intelligent M_bus concentrator.
Background technology
(meter bus MBus) is a kind of novel bus structure to meter bus, and the MBus principal feature is to power simultaneously and transmitting serial data by two nonpolarity transmission lines, and each substation (confirming with different ID) is connected in parallel on the MBus bus.When MBus is used for the energy consumption class intelligent management system of all kinds of instrument or relevant apparatus, can gathers and transmit related data or signal.
At present, residential quarters, managing power consumption is not carried out in the common employing of the instrument that install in areas such as office space, adopt the mode of manual metering to carry out data acquisition, manual metering not only efficient is low, and be unfavorable for scientific management, all bring very big difficulty for the modeling, analysis, planning etc. of urban pipe network.In addition, the wiring of existing data acquisition system (DAS) is complicated, and structure is complicated, has the shortcoming of the high and poor reliability of cost.
Summary of the invention
The purpose of this utility model is at the problems referred to above, proposes a kind of based on monolithic processor controlled digital intelligent M_bus concentrator.Utilize the MBus bus to connect all kinds of instrument, can simplify residential quarters greatly, the wiring of energy consumption intellectualized management systems such as office space be connected, and have simple in structure, cheap, high reliability features.
The technical solution of the utility model is:
A kind of based on monolithic processor controlled digital intelligent M_bus concentrator, it comprises receiver module, the sending module interface circuit, sending module and power-supplying circuit, described power-supplying circuit and receiver module, the power supply signal end of sending module links to each other, described sending module interface circuit and long-range main control system communicate, receive the control signal of main frame, the control signal output terminal of described sending module interface circuit links to each other with the control signal input end of sending module, and sending module output M_bus signal to the load that is attempted by on the M_bus bus is all kinds of metering devices; Receiver module links to each other with the resistance in series of load as the feedback signal collection terminal based on monolithic processor controlled digital intelligent M_bus concentrator, the electric current of collection load changes the voltage change signal on the resistance in series that causes, and being converted into the TTL signal, the signal output of this receiver module feeds back to main control system by the sending module interface circuit.
Receiver module of the present utility model comprises the MCU processor of single chip computer, the integrating circuit of being formed by resistance R DAC and capacitor C DAC, resistance in series R20 by load, the AD sampling filter circuit that resistance R 1 and capacitor C 102 constitute, comparer, by resistance R 153, the bleeder circuit that R103 constitutes and by voltage stabilizing diode V6.5V, the output circuit that resistance R 102 and triode Q3 constitute, the A/D sampling pin MCU_ADC1 of described MCU processor of single chip computer links to each other with resistance R 1, the end of resistance R DAC and the SCM PWM output pin MCU_DAC in the receiver module, the other end is connected in series with the end of capacitor C DAC, the other end ground connection of capacitor C DAC, resistance R DAC links to each other with the anti-phase scaling signal input end of comparer with the tie point of capacitor C DAC, the in-phase proportion signal input part series resistor R103 of comparer and resistance R 20 back ground connection, capacitor C 102 is attempted by the two ends of resistance R 20, the power end of comparer, between anti-phase scaling signal input end and the in-phase proportion signal input part and connect bleeder circuit, the signal output part of comparer is connected in series voltage stabilizing diode V6.5V successively, resistance R 102 and triode Q3 export the TTL signal to the sending module interface circuit by triode Q3.
Receiver module of the present utility model comprises that also transient state suppresses high-voltage diode VTS9V, and transient state suppresses the plus earth of high-voltage diode VTS9V, and negative pole links to each other with the in-phase proportion signal input part of comparer.
Sending module of the present utility model be with the TTL signal that the sending module interface circuit is come convert to the M_bus signal both high level 36V low level 20V export, comprise the voltage stabilizing chip, field effect transistor M2, diode D3, triode Q2 and peripheral circuit constitute, one end of described resistance R 101 links to each other with the output terminal of sending module interface circuit as the signal input of sending module, the other end of resistance R `01 links to each other with triode Q2 base stage, the grounded emitter of triode Q2, the collector of triode Q2 is by resistance R 123, the source electrode of R2001 and field effect transistor M2 and grid are connected to form the high level output circuit, voltage stabilizing chip and diode D3 composition low level output circuit are attempted by on the source electrode and drain electrode of field effect transistor M2, and capacitor C 101 is formed electric source filter circuits with capacitor C 100.
Of the present utility modelly also comprise overload protecting circuit based on monolithic processor controlled digital intelligent M_bus concentrator, a signal end of this overload protecting circuit is connected with power-supplying circuit is two-way, and to be that all kinds of metering devices are two-way with load be connected another signal end.
Sending module interface circuit of the present utility model changes TTL interface chip, RS485 commentaries on classics TTL interface chip and waved switch by RS232 and constitutes.
Power-supplying circuit of the present utility model adopts wide voltage 9～12V, 2A DC power supply, isolating transformer output+5V the power supply of leading up to uses for the sending module interface circuit, the steady chip of leading up to uses for the MCU processor of single chip computer of receiver module and sending module interface circuit, and the DC～DC of the leading up to chip IC 5203 of boosting is used for sending module to+36V.
The beneficial effects of the utility model:
DAC module and analog comparator have been increased in the receiver module of the present utility model as auxiliary circuit.Single-chip microcomputer DAC module output pin and resistance R DAC and capacitor C DAC form integrating circuit.Single-chip microcomputer is realized the aanalogvoltage of 256 grades of output through integrating circuit by the different waveform of output duty cycle.This magnitude of voltage be the steady state voltage that collects of resistance R 20 ends (bus for " 1 " and the time steady state voltage) add 200mV, be input to the negative input end of comparer IC2901 then.Resistance R 20 terminal voltages are input to the positive input terminal of comparer IC2901.When comparator output signal upset during change in voltage 400mV on the R20 resistance, successively by voltage stabilizing diode V6.5V, resistance R 102 and triode Q3, by triode Q3 output TTL signal to the sending module interface circuit.
The utility model has effectively overcome the difficult problem that bus voltage current drift that the bus voltage temperature influence brings by disturbing effect causes the data communication failure.The utility model receiving circuit carries out the real sampling of reality based on single-chip microcomputer to the R20 resistive voltage that bus current namely is connected on the bus, the voltage that samples is superimposed with the DAC circuit that the 200mV increment forms by single-chip microcomputer and integrating circuit outputs to comparer, the effective like this problem that overcomes the bus voltage current drift.
The utility model receiving circuit has effectively overcome the problem that simple digital circuit is handled the output waveform time-delay based on the mode that digital microcontroller and analog comparator combine.The bus voltage electric current changes the output that can control comparer by the real fullsized of comparer, can realize the zero propagation transmission.
The utility model power circuit has adopted overload protection function, efficiently solves the damage that the excessive or bus short circuit of bus load brings collector and bus system.Collector has automatic warning function when bus short circuit, and the bright bus power source of cutting off simultaneously of alarm lamp is excluded the back collector up to fault and recovers bus-powered automatically.
The utility model utilizes the MBus bus to connect all kinds of instrument, can simplify residential quarters greatly, the wiring of energy consumption intellectualized management systems such as office space be connected, and have simple in structure, cheap, high reliability features.Saved the expense of manual maintenance greatly, and managerial cost.
The utility model adopts the MBus bus to check meter wire transmission apart from reaching 1200 meters, high level (36-42) V low level (18-24) V.Have the strong characteristics of long transmission distance antijamming capability.The combining wireless transmitter is overlayable wider.Present four table industries nearly all adopt the MBus bus to check meter, because bus has only two and do not distinguish polarity this brings great convenience for wiring and construction.Only two buses of instrument need be linked on the bus when workman constructs and get final product.It is very simple to open up the benefit structure, every collector can 128 instrument of carry, collector uplink signal can insert the internet by wireless DTU equipment and realize the unified management of checking meter in the different districts, also can carry out the unified management of same residential quarter by concentrator with wired meter reading method.Maintenance cost is low, only needs during the new instrument of maintain and replace simply bus to be connected get final product.Security of operation, collector has automatic warning function when bus short circuit, and the bright bus power source of cutting off simultaneously of alarm lamp is excluded the back collector up to fault and recovers bus-powered automatically.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is the circuit diagram of receiver module in the utility model.
Fig. 3 is the circuit diagram of sending module in the utility model.
Fig. 4 is the circuit diagram of power-supplying circuit in the utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, a kind of based on monolithic processor controlled digital intelligent M_bus concentrator, it comprises receiver module, the sending module interface circuit, sending module and power-supplying circuit, described power-supplying circuit and receiver module, the power supply signal end of sending module links to each other, described sending module interface circuit and long-range main control system communicate, receive the control signal of main frame, the control signal output terminal of described sending module interface circuit links to each other with the control signal input end of sending module, and sending module output M_bus signal to the load that is attempted by on the M_bus bus is all kinds of metering devices; Receiver module links to each other with the resistance in series of load as the feedback signal collection terminal based on monolithic processor controlled digital intelligent M_bus concentrator, the electric current of collection load changes the voltage change signal on the resistance in series that causes, and being converted into the TTL signal, the signal output of this receiver module feeds back to main control system by the sending module interface circuit.
Receiver module of the present utility model comprises the MCU processor of single chip computer, the integrating circuit of being formed by resistance R DAC and capacitor C DAC, resistance in series R20 by load, the AD sampling filter circuit that resistance R 1 and capacitor C 102 constitute, comparer, by resistance R 153, the bleeder circuit that R103 constitutes and by voltage stabilizing diode V6.5V, the output circuit that resistance R 102 and triode Q3 constitute, the A/D sampling pin MCU_ADC1 of described MCU processor of single chip computer links to each other with resistance R 1, the end of resistance R DAC and the SCM PWM output pin MCU_DAC in the receiver module, the other end is connected in series with the end of capacitor C DAC, the other end ground connection of capacitor C DAC, resistance R DAC links to each other with the anti-phase scaling signal input end of comparer with the tie point of capacitor C DAC, the in-phase proportion signal input part series resistor R103 of comparer and resistance R 20 back ground connection, capacitor C 102 is attempted by the two ends of resistance R 20, the power end of comparer, between anti-phase scaling signal input end and the in-phase proportion signal input part and connect bleeder circuit, the signal output part of comparer is connected in series voltage stabilizing diode V6.5V successively, resistance R 102 and triode Q3 export the TTL signal to the sending module interface circuit by triode Q3.
The receiving circuit course of work: M_bus+ as shown in Figure 2, M_bus-is positive pole and the negative pole interface of M_bus bus, the instrument return data is the current delivery that changes.End instrument is a kind of current pulse sequence to the data code flow that concentrator sends, and uses the current value presentation logic " 1 " of 1. 5 mA usually, when transmission " 0 ", can make current value increase by 11～20 mA by the control of end instrument terminal.When stable state, the one state of the value on the circuit for continuing.Collector with bus M_bus-negative pole by the series connection 20 Ω resistance R 20 with " " link to each other, single-chip microcomputer is by the real real ohmically voltage of R20 of gathering of A/D when bus is " 1 ", the voltage value of gathering added 200mV drive the integrating circuit of being made up of resistance R DAC and capacitor C DAC by the PWM square wave and realize that D/A changes.The big 200mV of voltage on the voltage ratio resistance R 20 of capacitor C DAC end so.The voltage of capacitor C DAC end is input to the negative input end of comparer IC2904, voltage on the resistance R 20 is input to the positive input terminal of comparer IC2904, output terminal than device IC2904 links to each other with the base stage of NPN triode Q3, comparer output this moment " 0 " triode Q3 ends, and triode Q3 collector is by pull-up resistor output " 1 ".When increasing by 11～20 mA, bus bus current when transmitting " 0 " on resistance in series R20, just have the voltage of 220mV-400mV to increase so.Voltage on the resistance R 20 is greater than voltage comparator output " 1 " triode Q3 conducting of capacitor C DAC end, triode Q3 collector output " 0 " at this moment.Thereby realize that the current signal that will change converts the process of TTL signal to.
In order to prevent that interference that bus is subjected to strong-electromagnetic field from causing the damage of single-chip microcomputer and comparer, in last figure circuit, increased the VTS9V transient state and suppressed high-voltage diode and protect.
In order to prevent that bus short circuit from causing systemic breakdown, last figure forms bleeder circuit by resistance R 153 with R103 and passes through the real fullsized of comparer than the change in voltage on the resistance R 20, comparer output control signal cut-out bus power source when the voltage on the resistance R 20 is formed dividing potential drop greater than resistance R 153 with R103.Wait for when bus short circuit is repaired turn-on bus power supply again.
As shown in Figure 3, sending module of the present utility model be with the TTL signal that the sending module interface circuit is come convert to the M_bus signal both high level 36V low level 20V export, comprise the voltage stabilizing chip, field effect transistor M2, diode D3, triode Q2 and peripheral circuit constitute, one end of described resistance R 101 links to each other with the output terminal of sending module interface circuit as the signal input of sending module, the other end of resistance R 101 links to each other with triode Q2 base stage, the grounded emitter of triode Q2, the collector of triode Q2 is by resistance R 123, the source electrode of R2001 and field effect transistor M2 and grid are connected to form the high level output circuit, voltage stabilizing chip and diode D3 composition low level output circuit are attempted by on the source electrode and drain electrode of field effect transistor M2, and capacitor C 101 is formed electric source filter circuits with capacitor C 100.
The course of work of sending module: the base stage that is coupled to triode Q2 by the TTL signal of sending module interface circuit input through the TXD interface of this sending module by resistance R 101, when TTL signal input " 0 ", NPN type triode Q2 ends, P type field effect transistor M2 ends, and the voltage of M_bus+ output is provided by diode D3 by IC 78M20 voltage stabilizing output 20V voltage.When TTL signal input " 1 ", NPN type triode Q2 conducting, P type field effect transistor M2 conducting, the voltage of M_bus+ output provides for the voltage 36V of effect pipe M2 conducting output.
Of the present utility modelly also comprise overload protecting circuit based on monolithic processor controlled digital intelligent M_bus concentrator, a signal end of this overload protecting circuit is connected with power-supplying circuit is two-way, and to be that all kinds of metering devices are two-way with load be connected another signal end.
Sending module interface circuit of the present utility model changes TTL interface chip, RS485 commentaries on classics TTL interface chip and waved switch by RS232 and constitutes.
As shown in Figure 4, power-supplying circuit of the present utility model adopts wide voltage 9～12V, 2A DC power supply, isolating transformer output+5V the power supply of leading up to uses for the sending module interface circuit, the steady chip of leading up to uses for the MCU processor of single chip computer of receiver module and sending module interface circuit, and the DC～DC of the leading up to chip IC 5203 of boosting is used for sending module to+36V.
The utility model does not relate to partly all, and the prior art that maybe can adopt same as the prior art is realized.
Claims (8)
1. one kind based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that it comprises receiver module, the sending module interface circuit, sending module and power-supplying circuit, described power-supplying circuit and receiver module, the power supply signal end of sending module links to each other, described sending module interface circuit and long-range main control system communicate, receive the control signal of main frame, the control signal output terminal of described sending module interface circuit links to each other with the control signal input end of sending module, and sending module output M_bus signal to the load that is attempted by on the M_bus bus is all kinds of metering devices; Receiver module links to each other with the resistance in series of load as the feedback signal collection terminal based on monolithic processor controlled digital intelligent M_bus concentrator, the electric current of collection load changes the voltage change signal on the resistance in series that causes, and being converted into the TTL signal, the signal output of this receiver module feeds back to main control system by the sending module interface circuit.
2. according to claim 1 based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that described receiver module comprises the MCU processor of single chip computer, the integrating circuit of being formed by resistance R DAC and capacitor C DAC, resistance in series R20 by load, the AD sampling filter circuit that resistance R 1 and capacitor C 102 constitute, comparer, by resistance R 153, the bleeder circuit that R103 constitutes and by voltage stabilizing diode V6.5V, the output circuit that resistance R 102 and triode Q3 constitute, the A/D sampling pin MCU_ADC1 of described MCU processor of single chip computer links to each other with resistance R 1, the end of resistance R DAC and the SCM PWM output pin MCU_DAC in the receiver module, the other end is connected in series with the end of capacitor C DAC, the other end ground connection of capacitor C DAC, resistance R DAC links to each other with the anti-phase scaling signal input end of comparer with the tie point of capacitor C DAC, the in-phase proportion signal input part series resistor R103 of comparer and resistance R 20 back ground connection, capacitor C 102 is attempted by the two ends of resistance R 20, the power end of comparer, between anti-phase scaling signal input end and the in-phase proportion signal input part and connect bleeder circuit, the signal output part of comparer is connected in series voltage stabilizing diode V6.5V successively, resistance R 102 and triode Q3 export the TTL signal to the sending module interface circuit by triode Q3.
3. according to claim 2 based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that described receiver module comprises that also transient state suppresses high-voltage diode VTS9V, transient state suppresses the plus earth of high-voltage diode VTS9V, and negative pole links to each other with the in-phase proportion signal input part of comparer.
4. according to claim 1 based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that described sending module comprises the voltage stabilizing chip, field effect transistor M2, diode D3, triode Q2 and peripheral circuit constitute, one end of resistance R 101 links to each other with the output terminal of sending module interface circuit as the signal input of sending module, the other end of resistance R 101 links to each other with triode Q2 base stage, the grounded emitter of triode Q2, the collector of triode Q2 is by resistance R 123, the source electrode of R2001 and field effect transistor M2 and grid are connected to form the high level output circuit, voltage stabilizing chip and diode D3 composition low level output circuit are attempted by on the source electrode and drain electrode of field effect transistor M2, and capacitor C 101 is formed electric source filter circuits with capacitor C 100.
5. according to claim 1 based on monolithic processor controlled digital intelligent M_bus concentrator; it is characterized in that describedly also comprising overload protecting circuit based on monolithic processor controlled digital intelligent M_bus concentrator; one signal end of this overload protecting circuit is connected with power-supplying circuit is two-way, and to be that all kinds of metering devices are two-way with load be connected another signal end.
6. according to claim 1 based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that described sending module interface circuit changes TTL interface chip, RS485 commentaries on classics TTL interface chip and waved switch by RS232 and constitutes.
7. according to claim 1 based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that described power-supplying circuit adopts wide voltage 9～12V, 2A DC power supply, isolating transformer output+5V the power supply of leading up to uses for the sending module interface circuit, the steady chip of leading up to uses for the MCU processor of single chip computer of receiver module and sending module interface circuit, and the DC～DC of the leading up to chip IC 5203 of boosting is used for sending module to+36V.
8. according to claim 7 based on monolithic processor controlled digital intelligent M_bus concentrator, it is characterized in that described chip IC 5203 frequency of operation of boosting are 500KHz, by inductance L 1 and sustained diode 2 and filter capacitor C4, C5 composition booster circuit.
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| CN 201320115725 CN203149372U (en) | 2013-03-14 | 2013-03-14 | Digital intelligent M-bus concentrator based on single-chip microcomputer control |
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| CN 201320115725 CN203149372U (en) | 2013-03-14 | 2013-03-14 | Digital intelligent M-bus concentrator based on single-chip microcomputer control |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683386A (en) * | 2017-03-03 | 2017-05-17 | 济南瑞泉电子有限公司 | Intelligent concentrator of valve control water meter |
| CN107256626A (en) * | 2017-07-19 | 2017-10-17 | 南京新联电子股份有限公司 | Based on MBUS standard agreements collection water, heat, the method for gas meter |
| CN107564264A (en) * | 2017-09-21 | 2018-01-09 | 长沙瑞斯康通信技术有限公司 | M bus trailing frogs |
| CN107728507A (en) * | 2017-08-31 | 2018-02-23 | 重庆市爱伦吉科技有限公司 | Controller and control system between Intelligent sanitary |
| CN108289058A (en) * | 2018-03-14 | 2018-07-17 | 安徽南瑞中天电力电子有限公司 | A kind of energy source gateway setting MBUS bus voltages |
| CN108470011A (en) * | 2018-05-15 | 2018-08-31 | 赫星科技有限公司 | Unmanned plane support plate |
| CN111786863A (en) * | 2020-06-03 | 2020-10-16 | 汉威科技集团股份有限公司 | Bus quiescent current tracking circuit and bus communication circuit |
| CN112363964A (en) * | 2020-11-12 | 2021-02-12 | 深圳云顶智慧科技有限公司 | High-reliability MBUS (bus bar bus) host circuit |
| CN112498110A (en) * | 2020-12-08 | 2021-03-16 | 航天科技控股集团股份有限公司 | Single-line three-state signal sampling system of automobile instrument and sampling method thereof |
| CN112564724A (en) * | 2020-11-20 | 2021-03-26 | 浙江正泰仪器仪表有限责任公司 | MBUS host computer receiving circuit |
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2013
- 2013-03-14 CN CN 201320115725 patent/CN203149372U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683386A (en) * | 2017-03-03 | 2017-05-17 | 济南瑞泉电子有限公司 | Intelligent concentrator of valve control water meter |
| CN107256626A (en) * | 2017-07-19 | 2017-10-17 | 南京新联电子股份有限公司 | Based on MBUS standard agreements collection water, heat, the method for gas meter |
| CN107728507A (en) * | 2017-08-31 | 2018-02-23 | 重庆市爱伦吉科技有限公司 | Controller and control system between Intelligent sanitary |
| CN107564264A (en) * | 2017-09-21 | 2018-01-09 | 长沙瑞斯康通信技术有限公司 | M bus trailing frogs |
| CN108289058B (en) * | 2018-03-14 | 2023-06-23 | 安徽南瑞中天电力电子有限公司 | Energy gateway capable of setting MBUS bus voltage |
| CN108289058A (en) * | 2018-03-14 | 2018-07-17 | 安徽南瑞中天电力电子有限公司 | A kind of energy source gateway setting MBUS bus voltages |
| CN108470011A (en) * | 2018-05-15 | 2018-08-31 | 赫星科技有限公司 | Unmanned plane support plate |
| CN111786863A (en) * | 2020-06-03 | 2020-10-16 | 汉威科技集团股份有限公司 | Bus quiescent current tracking circuit and bus communication circuit |
| CN112363964A (en) * | 2020-11-12 | 2021-02-12 | 深圳云顶智慧科技有限公司 | High-reliability MBUS (bus bar bus) host circuit |
| CN112363964B (en) * | 2020-11-12 | 2024-03-19 | 深圳云顶智慧科技有限公司 | MBUS host circuit with high reliability |
| CN112564724A (en) * | 2020-11-20 | 2021-03-26 | 浙江正泰仪器仪表有限责任公司 | MBUS host computer receiving circuit |
| CN112564724B (en) * | 2020-11-20 | 2022-11-29 | 浙江正泰仪器仪表有限责任公司 | MBUS host computer receiving circuit |
| CN112498110A (en) * | 2020-12-08 | 2021-03-16 | 航天科技控股集团股份有限公司 | Single-line three-state signal sampling system of automobile instrument and sampling method thereof |
| CN112498110B (en) * | 2020-12-08 | 2023-04-25 | 航天科技控股集团股份有限公司 | Single-line tri-state signal sampling system and sampling method of automobile instrument |
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Assignee: Jiangsu third occasion Electronics Co., Ltd. Assignor: Wu Xingzhong Contract record no.: 2013320000836 Denomination of utility model: Digital intelligent M-bus concentrator based on single-chip microcomputer control Granted publication date: 20130821 License type: Exclusive License Record date: 20131225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |