CN102447465A - Serial port TXD (Transmit Data) line managed automated connector base for 2<4N>/2 sets of household electronic and electrical appliances - Google Patents
Serial port TXD (Transmit Data) line managed automated connector base for 2<4N>/2 sets of household electronic and electrical appliances Download PDFInfo
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- CN102447465A CN102447465A CN2010105031544A CN201010503154A CN102447465A CN 102447465 A CN102447465 A CN 102447465A CN 2010105031544 A CN2010105031544 A CN 2010105031544A CN 201010503154 A CN201010503154 A CN 201010503154A CN 102447465 A CN102447465 A CN 102447465A
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Abstract
The invention relates to a serial port TXD (Transmit Data) line managed automated connector base for 2<4N>/2 sets of household electronic and electrical appliances, belonging to the interface devices of a computer and household appliances. The computer is taken as a host computer; the conditions of three digital output type sensors and the change of the state of one sensor are detected through an input call line of a serial port; serial data are sent out by a serial port transmitting data line; and instruction data are generated through multi-digit binary counting and decoding so as to manage the 2<4N>/2 sets of household electronic and electrical appliances. The automated connector base comprises an RS232C interface, a USB (Universal Serial Bus) interface, a USB-to-serial-port circuit, four sets of sensor interface terminals, an RS232-to-TTL/CMOS (Transistor-Transistor Logic/Complimentary Metal Oxide Semiconductor) level switch circuit, a 4N (N= 1, 2, 3, ......) binary counting circuit, a 4N-to-2<4N> decoding circuit, a data output enable circuit, a data latch circuit, 2<4N>/2 sets of electronic switching circuits, a voltage-stabilizing power supply circuit and a lightning and surge preventing circuit, wherein signals of TXD, DTR (Data Terminal Ready) and RTS (Ready to Send) are respectively transmitted to a clock input terminal of the binary counting circuit, a reset terminal of the binary counting circuit and an output enable terminal of the data output enable circuit. The serial port TXD line managed automated connector base is used for the automation of multiple paths of household electronic and electrical appliances.
Description
Technical field
The invention belongs to the application electric technology field, particularly relate to the interface arrangement of a kind of computer and home electronic appliance.
Background technology
The utility model " serial port sends the home electronic appliance automation junction block of data wire management " of submitting Patent Office of State Intellectual Property Office examination in mid-September, 2010 to is with the output interconnection DTR of the serial port reset signal as Yue Shi decade counter CD4017; Send out serial data to decade counter from the TXD mouth line of serial port; Be converted into the parallel data instruction; And, manage 4 groups of home electronic appliances with the output of the output interconnection RTS control command data of serial port.
Summary of the invention
The object of the present invention is to provide 2 of a kind of serial port TXD spool reason
4N/ 2 groups of home electronic appliance automation junction blocks; It is main frame with the computer; Four input interconnections through serial port detect the situation of 3 digital quantity output type transducers and the variation of 1 sensor status; Send data wire through serial port and send out binary data, produce director data, management 2 through decoding
4N/ 2 pairs of domestic electronics or electrical equipment; Comprise: 9 pin RS232C interfaces, USB interface, USB change serial port circuit, the 4 pairs of sensor interface terminals, RS232 → TTL/CMOS level shifting circuit, 4N (N=1,2,3 ... ..) position binary counter circuit, 4N → 2
4NDecoding circuit, data output enable circuit, data-latching circuit, 2
4N/ 2 groups of electronic switching circuits, voltage-stabilized power supply circuit, anti-thunderbolt and surge circuit and power line and plugs thereof.
The technical solution adopted for the present invention to solve the technical problems is:
USB interface is connected to the corresponding signal input part that USB changes the serial port circuit, the corresponding port line parallel of the latter's signal output part and RS232C interface; The first pin CD of RS232C interface, the 6th pin DSR, the 8th pin CTS are connected a pull-up resistor respectively to positive source with nine kinds of needles RI, and this four pin and power cathode have constituted 4 pairs of sensor interface terminals respectively; The 3rd pin TXD of RS232C interface, the 4th pin DTR, the 7th pin RTS are connected respectively to three signal input parts of RS232 → TTL/CMOS level shifting circuit; Corresponding three signal output parts of this level shifting circuit are connected respectively to 4N (N=1; 2; 3 ...) clock signal input terminal and the reset terminal thereof of position binary counter circuit, the output enable end of data output enable circuit; 4N (N=1,2,3 ...) 4N of position binary counter circuit (N=1,2,3 ...) individual count results output is connected respectively to 4N → 2
4NThe 4N of decoding circuit (N=1,2,3 ...) individual signal input part, 2 of this decoding circuit
4NIndividual signal output part is connected respectively to 2 of data output enable circuit
4NIndividual data input, 2 of data output enable circuit
4NIndividual signal output part connects a pull down resistor respectively to power cathode, and is connected respectively to 2 of data-latching circuit
4N/ 2 opposed 1 end S and reset terminal R; 2 of data-latching circuit
4N/ 2 output Q are connected respectively to the signal input end of electronic switching circuit separately; The ac input end of voltage-stabilized power supply circuit is parallelly connected with anti-thunderbolt and surge circuit, receives civil power through power line and plug thereof, and the power cathode of voltage-stabilized power supply circuit links to each other with the 5th pin GND of RS232C interface.
Said voltage-stabilized power supply circuit is made up of power transformer, diode bridge rectifier circuit, capacitor filter and circuit of three-terminal voltage-stabilizing integrated 7815, and two outputs of 7815 have constituted the positive source and the power cathode of this device respectively.
Said anti-thunderbolt and surge circuit are composed in series by a fuse and a piezo-resistance.
Said RS232 → TTL/CMOS level shifting circuit is divided into three the tunnel, and the structure on each road is identical, comprising: triode, base resistance, collector resistance, schmitt inverter and working station indicator circuit; Wherein, One end of base resistance is as the signal input part of this road level shifting circuit; The other end is connected to the base stage of triode; The collector electrode of positive source and collector resistance, triode, emitter and power cathode are formed series circuit, and the collector electrode of triode is also connected to the input of a schmitt inverter, and the output of this schmitt inverter is as the signal output part of this road level shifting circuit; The series circuit that the working station indicator circuit is made up of the output of positive source, light-emitting diode and current-limiting resistance thereof and said schmitt inverter.
Said 2
4NThe structure of/2 groups of electronic switching circuits is identical, comprises separately: No. 1 alternating current electronic switching circuit and No. 1 direct current relay electronic switching circuit.
Said alternating current electronic switching circuit comprises: 1 NPN triode, 1 PNP triode, 1 base resistance, 1 base biasing resistor, 1 collector resistance, 1 current limliting are with collector resistance and a solid-state relay; Wherein, The base stage of one termination NPN triode of base resistance; The other end is as the signal input end of this electronic switching circuit, and base biasing resistor is connected in parallel on the emitter junction of PNP triode, and the emitter of this PNP triode connects positive source; Collector resistance of its base stage series connection is connected to the collector electrode of NPN triode; The emitter of NPN triode is connected to power cathode, and current limliting of the collector electrode of PNP triode series connection is connected to the positive pole in the signal input end of solid-state relay with collector resistance, and the negative pole in the signal input end of solid-state relay is connected to power cathode; Two outputs of solid-state relay constitute the output of this alternating current electronic switching circuit.
Said direct current relay electronic switching circuit comprises: triode and base resistance, a diode, a light-emitting diode and a direct current relay; Wherein, The base stage of one termination triode of base resistance; The other end is as the signal input end of this electronic switching circuit, and the emitter of triode is connected to power cathode, and its collector electrode is connected to the negative pole of light-emitting diode; The positive pole of light-emitting diode is connected respectively to the end of coil of positive pole and the direct current relay of diode, and the other end of the negative pole of diode and the coil of direct current relay all is connected to positive source; Six terminals of two pairs of single-pole double-throw switch (SPDT)s of direct current relay have constituted the output of this direct current relay electronic switching circuit.
Said 4N (N=1,2,3 ...) and the position binary counter circuit become by N piece tetrad counter stage joint group.
Said 4N → 2
4NDecoding circuit is organized by gate circuit.
Said data output enable circuit is made up of noninverting tristate buffer CD4503 side by side.
Said data-latching circuit is by 2
4N/ 2 d type flip flops or rest-set flip-flop are formed.
The present invention has constituted the interface between computer and the home electronic appliance; Under the management of computer software; Cooperate digital quantity output type working sensor; Comprise: output signal be the switching value type ,+3V～+ the level type of 15V or the transducer of pulse signal type or resistance saltus step type, be used to detect the state variation of being concerned about; The combination of transducer and household electrical appliance is adapted to multiple occasion; Its advantage is: the reset terminal of controlling binary counter with the output interconnection DTR of computer serial port; Utilize serial data transmitting terminal TXD to cooperate binary counter to send out correct binary data; Generate director data through decoding circuit; Use the correct director data of output interconnection RTS output, management 2
4N/ 2 pairs of light current and forceful electric power electronic switching circuit.
Description of drawings
Below in conjunction with accompanying drawing, further specify the present invention.
Fig. 1 has represented the interface circuit of serial port and transducer, the block diagram of voltage-stabilized power supply circuit.
Fig. 2 is the schematic diagram of RS232 → TTL/CMOS level shifting circuit.
Fig. 3 is 4N position binary counter circuit, 4N → 2
4NDecoding circuit, data output enable circuit, data-latching circuit, 2
4NThe schematic diagram of/2 groups of electronic switching circuits, wherein, N=2.
Fig. 4 is the schematic diagram of one group of electronic switching circuit.
Among the figure, 001.-128. electronic switching circuit, 5. voltage-stabilized power supply circuit, 51. anti-thunderbolts and surge circuit, 6.USB interface, 7.USB commentaries on classics serial port circuit, 8.RS232C interface, 21.-22. binary counter CD4516,23.4N → 2
4NDecoding circuit (N=2), 24. data output enable circuit, 25. data-latching circuits, 31. single-pole double throw direct current electromagnetic relays, 32. solid-state relay SSR.
Embodiment
The transmission range of the RS232C interface of computer can reach 15 meters; Corresponding level+the 3V of logical zero～+ 15V; Corresponding level-the 3V of logical one～(15) V, detect the response signal of external equipment through the following event attribute of serial communication control MSComm32.OCX: 1) state of ComEvCTS:Clear_to_Send line changes; 2) state of ComEvDSR:Data_Set_Ready line changes to 0 from 1; 3) state of ComEvCD:Carrier_Detect line changes; 4) ComEvRing: detect bell signal; But; The attribute MSComm32.CTSholding/.DSRholding/.DCDholding that does not possess the serial communication control can't inquire about the height situation that detects its level, and some UART (asynchronous reception-transmitter) possibly not support this incident.
Therefore, as shown in Figure 1, adopt pull-up resistor R1; R2, R3, R4 and transducer Rs1; Rs2; Rs3, the mode of Rs4 ground connection has constituted the interface circuit of transducer, the transducer of adaptation comprises: output signal be the switching value type ,+3V～+ the level type of 15V or the transducer of pulse signal type or resistance saltus step type.The working power of family expenses transducer is generally＜DC power supply of 15V, be operated in indoorly, and need not consider at transducer Rs1, Rs2, Rs3 arranges the photoelectricity coupling circuit to make electrical isolation between Rs4 and the RS232C interface, reduced cost.But, be parallel with anti-thunderbolt and surge circuit (51) at the input of civil power.
HCMOS, the operating voltage of cmos circuit is respectively: 2V-6V and 3V-15V (4500B)-18V (4000B).Therefore, RS232 → TTL/CMOS level shifting circuit is as shown in Figure 2.Wherein, schmitt inverter is used for signal shaping.
Among Fig. 3,4N (N=2) but the position binary counter circuit form by four presentable binary counter integrated circuits of N=2 piece (21), (22) cascade, the binary counter CD4516 that is adopted can use the binary counter of other model instead.
Serial port sends and is in high level when line TXD puts down.The Settings attribute of serial communication control MSComm32.OCX is provided with the information format of asynchronous serial communication: " character+parity check bit of (1 low level) start bit+transmission+(1,1.5 or 2 high level) position of rest ".Its default parameter value is " 9600, N, 8,1 ", and the meaning is " employed COM1 is not done parity check with the speed transmission of per second 9600Bit, and each data cell is 8 Bit, and position of rest is 1 Bit ".Use following order also can realize this attribute: MSComm1.Settings=" 9600, n, 8,1 ".When program need transfer out a character string; Use the Output attribute of control MSComm32.OCX that character string is write in the output register; For example: MSComm1.Output=" ABCDE ", this is about to five characters of ABCDE and sends out in regular turn through the RS232C interface.Consider that its front of character of every transmission is superimposed with a low level beginning flag position; For example; The ASCII character of letter " B " is " 42H=01000010B "; Each transmission should letter, and the waveform that serial port line TXD sends is:
can produce 3 rising edge positive transition pulses; And transmitting letter " A "=" 41H=01000001B ", the waveform that serial port line TXD sends is:
only produces 2 rising edge positive transition pulses.Therefore; Earlier through DTR output high level; 4N (N=2) position binary counter circuit: q7q6...q1q0=Q3Q2Q1Q0Q3Q2Q1Q0=00000000 resets; Then; DTR=0 is set, and the reseting controling end level is invalid, sends out several letters " B " continuously through TXD again; But can make the output of four presentable binary counter CD4516 of N=2 piece (21), (22) produce successively following result: q7q6...q1q0=Q3Q2Q1Q0Q3Q2Q1Q0=00000011 (3), 00000110 (6), 00001001 (9), 00001100 (12), 00001111 (15), 00010010 (18), 00010101 (21), 00011000 (24), 00011011 (27), 00011110 (30), 00100011 (33) ... Be not difficult therefrom to find that the counting output result of 4N (N=2) position binary counter circuit can comprise the various possibility situation of 8=4 * N bit, one has 2
8=2
4N(N=2) plant.If pass through 4N → 2 to above-mentioned binary counting result again
4NDecoding circuit (23) is deciphered, and can produce corresponding 2
4NThe bar director data.Do not find ready-made integrated circuit or adopt their cascades to form 4N → 2
4NDecoding circuit (23).But; According to the logic of decoding, for example:
can be realized by gate circuit.
Data-latching circuit (25) is by 2
4N/ 2 d type flip flops or rest-set flip-flop are formed; Each trigger or rest-set flip-flop all have a reset terminal R or put 1 end S; They need use separately one independently line of instruction data manage; Function with latch mode, make its back connected electronic switching circuit [(001) ... Or (128)] according to instruction works.But, 4N (N=1,2,3 ...) position binary counter circuit and 4N → 2 that connect thereafter
4NDecoding circuit (23) can produce some other intermediateness data in serial port line TXD sends the process of binary data accurately, can to data latch cicuit (25) and electronic switching circuit [(001) ... Or (128)] exert an influence.For this reason, be designed with data output enable circuit (24), be made up of side by side some noninverting tristate buffer CD4503, they receive the control of serial port output interconnection RTS: during RTS=0, and 4N → 2
4NThe director data that decoding circuit (23) produces just can be applied on data-latching circuit (25) the control corresponding end through data output enable circuit (24), and instruction comes into force; During RTS=1, the output enable end Disable of data output enable circuit (24) is in the high level effective status, and its output presents high-impedance state, has cut off the transmission of director data.But; The high-impedance state of tristate buffer output may produce certain inductive impulse at random, influences follow-up cmos circuit, therefore; Each R or S control end at data-latching circuit (25) all are connected to a pull down resistor to power cathode; When the output of data output enable circuit (24) during in high-impedance state, each R or S control end are in reliable low level disarmed state, thereby data-latching circuit (25) is able to the state that keeps original.Data output enable circuit (24) also can be used 8D latch 74HC373 or tri-state bus driver 74HC244 instead; But the operating voltage of HCMOS circuit is VCC=2V～6V, and level output type or pulse signal output type transducer that working power is higher than this operating voltage VCC=2V～6V still can use.
Claims (11)
1. 2 of serial port TXD spool reason
4N/ 2 groups of home electronic appliance automation junction blocks; It is characterized in that, comprising: 9 pin RS232C interfaces, USB interface, USB change serial port circuit, the 4 pairs of sensor interface terminals, RS232 → TTL/CMOS level shifting circuit, 4N (N=1,2; 3 ...) position binary counter circuit, 4N → 2
4NDecoding circuit, data output enable circuit, data-latching circuit, 2
4N/ 2 groups of electronic switching circuits, voltage-stabilized power supply circuit, anti-thunderbolt and surge circuit and power line and plugs thereof; Wherein, USB interface is connected to the corresponding signal input part that USB changes the serial port circuit, the corresponding port line parallel of the latter's signal output part and RS232C interface; The first pin CD of RS232C interface, the 6th pin DSR, the 8th pin CTS are connected a pull-up resistor respectively to positive source with nine kinds of needles RI, and this four pin and power cathode have constituted 4 pairs of sensor interface terminals respectively; The 3rd pin TXD of RS232C interface, the 4th pin DTR, the 7th pin RTS are connected respectively to three signal input parts of RS232 → TTL/CMOS level shifting circuit; Corresponding three signal output parts of this level shifting circuit are connected respectively to 4N (N=1; 2; 3 ...) clock signal input terminal and the reset terminal thereof of position binary counter circuit, the output enable end of data output enable circuit; 4N (N=1,2,3 ...) 4N of position binary counter circuit (N=1,2,3 ...) individual count results output is connected respectively to 4N → 2
4NThe 4N of decoding circuit (N=1,2,3 ...) individual signal input part, 2 of this decoding circuit
4NIndividual signal output part is connected respectively to 2 of data output enable circuit
4NIndividual data input, 2 of data output enable circuit
4NIndividual signal output part connects a pull down resistor respectively to power cathode, and is connected respectively to 2 of data-latching circuit
4N/ 2 opposed 1 end S and reset terminal R; 2 of data-latching circuit
4N/ 2 output Q are connected respectively to the signal input end of electronic switching circuit separately; The ac input end of voltage-stabilized power supply circuit is parallelly connected with anti-thunderbolt and surge circuit, receives civil power through power line and plug thereof, and the power cathode of voltage-stabilized power supply circuit links to each other with the 5th pin GND of RS232C interface.
2. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks; It is characterized in that; Said voltage-stabilized power supply circuit is made up of power transformer, diode bridge rectifier circuit, capacitor filter and circuit of three-terminal voltage-stabilizing integrated, and two outputs of circuit of three-terminal voltage-stabilizing integrated have constituted the positive source and the power cathode of this device respectively.
3. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that, said anti-thunderbolt and surge circuit are composed in series by a fuse and a piezo-resistance.
4. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks; It is characterized in that; Said RS232 → TTL/CMOS level shifting circuit is divided into three the tunnel; The structure on each road is identical, comprising: triode, base resistance, collector resistance, schmitt inverter and working station indicator circuit; Wherein, One end of base resistance is as the signal input part of this road level shifting circuit; The other end is connected to the base stage of triode; The collector electrode of positive source and collector resistance, triode, emitter and power cathode are formed series circuit, and the collector electrode of triode is also connected to the input of a schmitt inverter, and the output of this schmitt inverter is as the signal output part of this road level shifting circuit; The series circuit that the working station indicator circuit is made up of the output of positive source, light-emitting diode and current-limiting resistance thereof and said schmitt inverter.
5. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that said electronic switching circuit is divided into 2
4N/ 2 groups, the circuit structure of each group is all identical, comprises separately: No. 1 alternating current electronic switching circuit and No. 1 direct current relay electronic switching circuit.
6. 2 of serial port TXD spool reason according to claim 5
4N/ 2 groups of home electronic appliance automation junction blocks; It is characterized in that said alternating current electronic switching circuit comprises: 1 NPN triode, 1 PNP triode, 1 base resistance, 1 base biasing resistor, 1 collector resistance, 1 current limliting are with collector resistance and a solid-state relay; Wherein, The base stage of one termination NPN triode of base resistance; The other end is as the signal input end of this electronic switching circuit, and base biasing resistor is connected in parallel on the emitter junction of PNP triode, and the emitter of this PNP triode connects positive source; Collector resistance of its base stage series connection is connected to the collector electrode of NPN triode; The emitter of NPN triode is connected to power cathode, and current limliting of the collector electrode of PNP triode series connection is connected to the positive pole in the signal input end of solid-state relay with collector resistance, and the negative pole in the signal input end of solid-state relay is connected to power cathode; Two outputs of solid-state relay constitute the output of this alternating current electronic switching circuit.
7. 2 of serial port TXD spool reason according to claim 5
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that, said direct current relay electronic switching circuit comprises: triode and base resistance, a diode, a light-emitting diode and a direct current relay; Wherein, The base stage of one termination triode of base resistance; The other end is as the signal input end of this electronic switching circuit, and the emitter of triode is connected to power cathode, and its collector electrode is connected to the negative pole of light-emitting diode; The positive pole of light-emitting diode is connected respectively to the end of coil of positive pole and the direct current relay of diode, and the other end of the negative pole of diode and direct current relay coil all is connected to positive source; Six terminals of two pairs of single-pole double-throw switch (SPDT)s of direct current relay have constituted the output of this direct current relay electronic switching circuit.
8. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that, said 4N (N=1,2,3 ... ..) the position binary counter circuit is become by N piece tetrad counter stage joint group.
9. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that said 4N → 2
4NDecoding circuit is organized by gate circuit.
10. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that, said data output enable circuit is made up of noninverting tristate buffer CD4503 side by side.
11. 2 of serial port TXD spool reason according to claim 1
4N/ 2 groups of home electronic appliance automation junction blocks is characterized in that said data-latching circuit is by 2
4N/ 2 d type flip flops or rest-set flip-flop are formed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105031544A CN102447465A (en) | 2010-10-11 | 2010-10-11 | Serial port TXD (Transmit Data) line managed automated connector base for 2<4N>/2 sets of household electronic and electrical appliances |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105031544A CN102447465A (en) | 2010-10-11 | 2010-10-11 | Serial port TXD (Transmit Data) line managed automated connector base for 2<4N>/2 sets of household electronic and electrical appliances |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098480A (en) * | 2020-09-03 | 2020-12-18 | 河北地质大学 | Electrochemical sensor change-over switch with adjustable channel quantity |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201928255U (en) * | 2010-09-16 | 2011-08-10 | 重庆工商大学 | Household electronic appliance automation wire holder with sending data line management by serial port |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201928255U (en) * | 2010-09-16 | 2011-08-10 | 重庆工商大学 | Household electronic appliance automation wire holder with sending data line management by serial port |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098480A (en) * | 2020-09-03 | 2020-12-18 | 河北地质大学 | Electrochemical sensor change-over switch with adjustable channel quantity |
| CN112098480B (en) * | 2020-09-03 | 2022-08-09 | 河北地质大学 | Electrochemical sensor change-over switch with adjustable channel quantity |
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Application publication date: 20120509 |