CN201937568U - Serial port query management check instruction type automatic wire holder for household electric appliance - Google Patents
Serial port query management check instruction type automatic wire holder for household electric appliance Download PDFInfo
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- CN201937568U CN201937568U CN2010205566639U CN201020556663U CN201937568U CN 201937568 U CN201937568 U CN 201937568U CN 2010205566639 U CN2010205566639 U CN 2010205566639U CN 201020556663 U CN201020556663 U CN 201020556663U CN 201937568 U CN201937568 U CN 201937568U
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Abstract
The utility model relates to a serial port query management check instruction type automatic wire holder for a household electric appliance, which belongs to an interface device of a computer and the household electric appliance, and is characterized in that: the computer transmits binary data through the (Transmit Data) TXD of a serial port, the input tie lines of the serial port check 3-bit data and detect four sensors, and a comparator checks instruction data and manages four pairs of household electronic or electric appliances. The automatic wire holder comprises an RS232C interface, a universal serial bus (USB) interface, a USB-to-serial port circuit, a level conversion circuit, two groups of 4-bit tri-state buffer drivers, four pairs of sensor interface wiring terminals, two-four encoders, a binary counter, a data output enable circuit, eight 4-bit comparators, a data latch circuit, four groups of electronic switching circuits, a voltage-regulating power supply circuit and a lightning-proof and anti-surge circuit, wherein the signals of a Data Terminal Ready (DTR), a Request To Send (RTS) and the TXD are respectively transmitted to two input ends of the two-four encoders and the clock signal input end of the counter, and the three output signals of the two-four encoders are respectively connected with the two groups of 4-bit tri-state buffer drivers and the enable end of the data output enable circuit. The automatic wire holder is used for automatically running the household electric appliance.
Description
Technical field
The utility model belongs to the application electric technology field, particularly relates to a kind of computer of household electrical appliance automation and interface arrangement of domestic electronic and electrical equipment realized.
Background technology
Submitting the utility model patent " the home electronic appliance automation junction block of serial port searching and managing " of Patent Office of State Intellectual Property Office examination in September, 2010 to is main frame with the computer, transmission data wire TXD by serial port transfers out the binary data instruction, four input interconnection verifications, three bit data wherein by serial port, the variation of the state of three Sensor of Switch-Output Type of detection and the state of a Sensor of Switch-Output Type, eight director datas of triad data command through the decoding generation, manage four pairs of domestic electronics or electrical equipment in view of the above, and described verification, detect and one of four composite signals that decoding output is generated through the decoding back by two output interconnections of serial port are respectively managed.
The utility model content
The household electrical appliance automation junction block that provides a kind of serial port searching and managing to check instruction type is provided the purpose of this utility model, it is main frame with the computer, transmission data wire TXD by serial port transfers out the binary data instruction, four variations of importing the state of interconnection verification three bit data, the state that detects three digital quantity output type transducers and a digital quantity output type transducer wherein by serial port, check instruction with comparator again, manage 4 pairs of domestic electronics or electrical equipment; Comprise: 9 pin RS232C interfaces, USB interface, USB change the serial port circuit,
Level shifting circuit, the ternary buffering driver of two groups of 4bit, the 4 pairs of sensor interface terminals, 2-4 decoder, binary counter, data output enable circuit, 8 4bit comparators, data-latching circuit, 4 groups of electronic switching circuits, voltage-stabilized power supply circuit, anti-lightning strike and surge circuit and supply main and plug thereof.
The technical scheme that its technical problem that solves the utility model adopts 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 4th pin DTR of RS232C interface, the 7th pin RTS, the 3rd pin TXD are connected respectively to
Three RS232C level signal inputs of level shifting circuit, corresponding three the TTL/CMOS level signal outputs of this level shifting circuit are connected respectively to two signal input parts of 2-4 decoder and the clock signal input terminal of binary counter; Two groups of ternary buffering drivers of 4bit, four signal output parts separately are in parallel in twos, constitute four groups of signal output parts, and they connect a pull-up resistor separately to positive source, also are connected respectively to
Four TTL/CMOS level signal inputs of level shifting circuit, four RS232C level signal outputs of the level shifting circuit corresponding with them are connected respectively to the first pin CD, the 6th pin DSR, the 8th pin CTS and the nine kinds of needles RI of RS232C interface; Four signal input parts of the ternary buffering driver of one group of 4bit are connected respectively to four count signal outputs of binary counter, and four signal input parts and the power cathode of the ternary buffering driver of another group 4bit have constituted 4 pairs of sensor interface terminals respectively; Four decoded signal outputs of 2-4 decoder it
Be connected respectively to ternary buffering driver of two groups of 4bit and data output enable circuit output enable end separately; Low three 3 signal input parts that are connected respectively to data output enable circuit in the count signal output of binary counter, 3 signal output parts of data output enable circuit connect a pull down resistor respectively to power cathode, also with 8 4bit comparators, one group of data input pin separately in A
0, A
1, A
2Be connected respectively, 8 4bit comparators A=B signal output part separately is connected respectively to 4 opposed 1 end S and reset terminal R of data-latching circuit; 4 output Q of data-latching circuit are connected respectively to the signal input end of electronic switching circuit separately; The ac input end of voltage-stabilized power supply circuit is received civil power with anti-lightning strike in parallel with the surge circuit by supply main 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.
Described 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 7806, and two outputs of 7806 have constituted the positive source and the power cathode of this device respectively.
Described anti-lightning strike the polyphone by a fuse and a piezo-resistance with the surge circuit formed.
Described
Level shifting circuit is made up of in conjunction with four electrochemical capacitors two MAX232.
The structure of described 4 groups of electronic switching circuits is identical, comprises separately: No. 1 solid-state relay electronic switching circuit and No. 1 direct current relay electronic switching circuit.
Described solid-state relay electronic switching circuit comprises: 1 NPN triode, 1 PNP triode, 1 base resistance, 1 base biasing resistor, 1 collector resistance, 1 current limliting collector resistance, a light-emitting diode 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, base biasing resistor is connected in parallel on the emitter junction of PNP triode, the emitter of this PNP triode connects positive source, collector resistance of its base stage series connection, a light-emitting diode is connected to the collector electrode of NPN triode, the emitter of NPN triode is connected to power cathode, 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, 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 solid-state relay electronic switching circuit.
Described direct current relay electronic switching circuit comprises: triode and base resistance, a 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, the emitter of triode is connected to power cathode, its collector electrode is connected respectively to an end of the coil of the positive pole of diode and direct current relay, 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.
Described 2-4 decoder is made up of 74HC139, and its low level effectively enables the termination power cathode.
Described binary counter is made up of CD4516, its reset terminal, presets several Enable Pins, carry input and all connects power cathode, count mode termination power positive pole.
Three cascade signal input A＜B of described 8 4bit comparators, A=B, A＞B are connected respectively to negative pole, positive pole and the negative pole of power supply, its one group of data input pin meta A
3All be connected to the 2-4 decoder four decoded signal outputs it
Position B in another group data input pin
3All be connected to power cathode, the three bit data input B of other among the latter
0, B
1, B
2Level preset to logical zero or 1 by switch.
Described data-latching circuit is made up of 4 rest-set flip-flops or d type flip flop.
Described data output enable circuit by eight D-latch 74HC373 or tristate buffer for example 74HC244 form.
The utility model has constituted the interface between computer and domestic electronic or the electrical equipment, under the management of computer software, by DTR the combination of RTS, select one of the ternary buffering driver of two groups of 4bit or data output enable circuit respectively for use, and then detect the variation of state or its state of four transducers, perhaps the verification serial port sends the binary command data of data port line output, and is perhaps to 4 groups of correct director datas of electronic switching circuit output, safe, convenient.Adopt comparator to replace the decoding circuit managing electrical household appliances, though the quantity of used device is how several, but, by distributing to two command codes of each household electrical appliance, comprise operation sign indicating number and sign indicating number out of service, its usefulness is that the used method of checking the binary data instruction helps using a computer and manages many group domestic electronics and electrical equipment, can not adopt the domestic electronic or the electrical equipment reference of singlechip technology for exploitation.
Description of drawings
Below in conjunction with accompanying drawing, further specify the utility model.
Fig. 1 is
Level shifting circuit, two groups of ternary buffering drivers of 4bit, sensor interface circuitry, 2-4 decoding circuit, USB interface, USB change principle (square frame) figure of serial port circuit and voltage-stabilized power supply circuit.
Fig. 2 is the circuit theory diagrams of 1 4bit comparator.
Fig. 3 is principle (square frame) figure of binary counter, data output enable circuit, 8 4bit comparators, data-latching circuit and electronic switching circuits.
Fig. 4 is the schematic diagram of one group of electronic switching circuit.
Among the figure, the 1.-4. electronic switching circuit, 5. voltage-stabilized power supply circuit, 51. anti-lightning strike and surge circuit, the 6.USB interface, 7.USB changes serial port circuit, 8.RS232C interface, 11.-12.
Level shifting circuit, 13. liang of ternary buffering drivers of group 4bit, 14.2-4 decoding circuit, 21. binary counter, 23. data output enable circuit, 24. data-latching circuits, 31. the single-pole double throw direct current electromagnetic relay, 32. solid-state relay SSR, 41.-48.4bit comparator.
Embodiment
As shown in Figure 1, the ternary buffering drivers of two groups of 4bit (13) and data output enable circuit (23) by four decoded signal outputs of 2-4 decoder (14) it
Select for use.At ordinary times, DTR/RTS=00,
Four transducer Rs1, Rs2, Rs3, the output signal of Rs4 can be input to the first pin CD, the 6th pin DSR, the 8th pin CTS and the nine kinds of needles RI of RS232C interface (8) by the ternary buffering driver of the 2nd group of 4bit; The signal that comes the detecting sensor sense events to be exported by the event attribute of serial communication control MSComm32.OCX in the program, adapt to output signal and be the switching value type ,+3V～+ the level type of 6V or the transducer of pulse signal type or resistance saltus step type.
The event attribute of serial communication control MSComm32.OCX comprises:
1ComEvSend: the number of characters in the transmission register also lacks than Sthreshold;
2ComEvReceive: receive Sthreshold character, this incident continues to produce up to removing from receiving register with the Input attribute;
The state of 3ComEvCTS:Clear_to_Send line changes;
The state of 4ComEvDSR:Data_Set_Ready line changes to 0 from 1;
The state of 5ComEvCD:Carrier_Detect line changes;
6ComEvRing: 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) may not support this incident;
7ComEvEOF: receive the end of data (ASCII is 26) character.
Serial port sends line and is in high level at ordinary times, the information format of asynchronous serial communication is: " character+parity check bit of (1 low level) start bit+transmission+(1,1.5 or 2 high level) position of rest " belongs to the Settings attribute of serial communication control MSComm32.OCX.For example, its default parameter value is " 9600, N, 8,1 ", and the meaning is " employed communication port 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 by the RS232C interface.Consider that its front of character of every transmission is superimposed with a low level beginning flag position, we select to transmit letter " B ", and its ASCII character is " 42H=0100 0010B ", therefore, the each transmission, the waveform that serial port line TXD sends is:
Can produce 3 rising edge positive transition pulses; And transmit letter " A "=" 41H=0100 0001B ", the waveform that serial port line TXD sends is:
Only produce 2 rising edge positive transition pulses.
As shown in Figure 3, the clock pulse signal input of binary counter (21) is that just to jump the limit effective.The state of supposing the output of binary counter (21) is Q3Q2Q1Q0=0000.Continuously transmit now several letters " B ", the count results that can make the output of binary counter (21) take place successively is: 0011=3,0110=6,1001=9,1100=12,1111=15,10010=18,10101=21,11000=24,11011=27,11110=30, or the like.We only are concerned about low three Q2Q1Q0, can see from The above results, till 11000=24, have occurred Q2Q1Q0=3 successively, 6,1,4,7,2,5,0 these 8 states completely.Cooperate 8 4bit comparators (41)-(48) of back, can control the start and stop of four groups of electronic switches.
But, because serial port only has two output interconnections, the unable binary counter of zero clearing again (21).So, designed DTR, the 2-4 decoder (14) of RTS decoding and one group of ternary buffering driver (13) of 4bit, the latter by four decoded signal outputs of 2-4 decoder (14) it
Come gating, constituted the input channel of the count status of inquiry binary counter (21),, reach the purpose of proofreading and correct the binary command data so that transfer out the letter " B " of suitable number again by the transmission data wire TXD of serial port.In the middle of this process, the count status at random of binary counter (21) must not be applied on 8 4bit comparators (41)-(48), otherwise can cause the misoperation of electronic switching circuit (1)-(4).For this reason, designed data output enable circuit (23), by four decoded signal outputs of 2-4 decoder (22) it
Come gating in due course, the correct director data of binary counter (21) output is passed to 8 4bit comparators (41)-(48).
Data output enable circuit (23) by eight D-latch 74HC373 or tristate buffer for example 74HC244 form, its output enable end by
Control generally be can't help
Or
Control because, if other circuit by
In the time of control, need intermediateness of experience from DTR/RTS=00 → 01 → 11, only to carry out an instruction required some delicate though it lasts, and can have influence on the action of data output enable circuit (23) after all, thereby can bring the malfunction of electronic switching circuit (1)-(4).
Output enable end when data output enable circuit (23)
In the time of invalid, its output presents high-impedance state, for eliminating the influence of labile state that electromagnetic induction brings to subsequent conditioning circuit, as shown in Figure 3, connect a pull down resistor respectively to power cathode at its output, made the comparing data input of 8 4bit comparators (41)-(48) at this moment all be in stable A
i=0 (i=0,1,2), and its high position
The output that causes each comparator all is that A＞B high level is effective, and their output A=B is in low level state, and is invalid to 4 couples of R, the S control end of data latch cicuit (24), do not influence the operating state of electronic switching circuit (1)-(4).
The decoding output signal of 2-4 decoder (14)
In the time of effectively, the output enable end of data output enable circuit (23)
Effectively, the count output signal of binary counter (21) is applied to the comparing data input A of 8 4bit comparators (41)-(48) by data output enable circuit (23)
i(i=0,1,2), its high position
If A takes place in some 4bit comparators
3A
2A
1A
0=B
3B
2B
1B
0, then its output comparative result A=B is that high level is effective, corresponding R of meeting trigger data latch cicuit (24) or S control end cause data-latching circuit (24) to move, and therefore can stop or starting the electronic switching circuit that it connects later.
According to its high-order connection of 8 4bit comparators shown in Figure 3 (41)-(48):
B
i=0 (i=3), in fact, they can guarantee
The time, the output of each comparator always: A＞B high level is effective, and A=B is in low level state, that is to say, can save data output enable circuit (23).
Claims (10)
1. the serial port searching and managing is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, comprising: 9 pin RS232C interfaces, USB interface, USB change the serial port circuit,
Level shifting circuit, the ternary buffering driver of two groups of 4bit, the 4 pairs of sensor interface terminals, 2-4 decoder, binary counter, data output enable circuit, 8 4bit comparators, data-latching circuit, 4 groups of electronic switching circuits, voltage-stabilized power supply circuit, anti-lightning strike and surge circuit and supply main and plug 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 4th pin DTR of RS232C interface, the 7th pin RTS, the 3rd pin TXD are connected respectively to
Three RS232C level signal inputs of level shifting circuit, corresponding three the TTL/CMOS level signal outputs of this level shifting circuit are connected respectively to two signal input parts of 2-4 decoder and the clock signal input terminal of binary counter; Two groups of ternary buffering drivers of 4bit, four signal output parts separately are in parallel in twos, constitute four groups of signal output parts, and they connect a pull-up resistor separately to positive source, also are connected respectively to
Four TTL/CMOS level signal inputs of level shifting circuit, four RS232C level signal outputs of the level shifting circuit corresponding with them are connected respectively to the first pin CD, the 6th pin DSR, the 8th pin CTS and the nine kinds of needles RI of RS232C interface; Four signal input parts of the ternary buffering driver of one group of 4bit are connected respectively to four count signal outputs of binary counter, and four signal input parts and the power cathode of the ternary buffering driver of another group 4bit have constituted 4 pairs of sensor interface terminals respectively; Four decoded signal outputs of 2-4 decoder it
Be connected respectively to ternary buffering driver of two groups of 4bit and data output enable circuit output enable end separately; Low three 3 signal input parts that are connected respectively to data output enable circuit in the count signal output of binary counter, 3 signal output parts of data output enable circuit connect a pull down resistor respectively to power cathode, also with 8 4bit comparators, one group of data input pin separately in A
0, A
1, A
2Be connected respectively, 8 4bit comparators A=B signal output part separately is connected respectively to 4 opposed 1 end S and reset terminal R of data-latching circuit; 4 output Q of data-latching circuit are connected respectively to the signal input end of electronic switching circuit separately; The ac input end of voltage-stabilized power supply circuit is received civil power with anti-lightning strike in parallel with the surge circuit by supply main 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. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, described 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. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, described anti-lightning strike the polyphone by a fuse and a piezo-resistance with the surge circuit formed.
4. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, the structure of described 4 groups of electronic switching circuits is identical, comprises separately: No. 1 solid-state relay electronic switching circuit and No. 1 direct current relay electronic switching circuit.
5. serial port searching and managing according to claim 4 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that described solid-state relay electronic switching circuit comprises: 1 NPN triode, 1 PNP triode, 1 base resistance, 1 base biasing resistor, 1 collector resistance, 1 current limliting collector resistance, a light-emitting diode 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, base biasing resistor is connected in parallel on the emitter junction of PNP triode, the emitter of this PNP triode connects positive source, collector resistance of its base stage series connection, a light-emitting diode is connected to the collector electrode of NPN triode, the emitter of NPN triode is connected to power cathode, 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, 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 solid-state relay electronic switching circuit.
6. serial port searching and managing according to claim 4 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that described direct current relay electronic switching circuit comprises: triode and base resistance, a 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, the emitter of triode is connected to power cathode, its collector electrode is connected respectively to an end of the coil of the positive pole of diode and direct current relay, 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.
7. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, described 2-4 decoder is made up of 74HC139, and its low level effectively enables the termination power cathode.
8. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, described binary counter is made up of CD4516, its reset terminal, presets several Enable Pins, carry input and all connects power cathode, count mode termination power positive pole.
9. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, three cascade signal input A＜B of described 8 4bit comparators, A=B, A＞B is connected respectively to negative pole, positive pole and the negative pole of power supply, its one group of data input pin meta A
3All be connected to the 2-4 decoder four decoded signal outputs it
Position B in another group data input pin
3All be connected to power cathode, the low three bit data input B among the latter
0, B
1, B
2Level preset to logical zero or 1 by switch.
10. serial port searching and managing according to claim 1 is checked the household electrical appliance automation junction block of instruction type, it is characterized in that, described data-latching circuit is made up of 4 rest-set flip-flops or d type flip flop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205566639U CN201937568U (en) | 2010-10-11 | 2010-10-11 | Serial port query management check instruction type automatic wire holder for household electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205566639U CN201937568U (en) | 2010-10-11 | 2010-10-11 | Serial port query management check instruction type automatic wire holder for household electric appliance |
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| Publication Number | Publication Date |
|---|---|
| CN201937568U true CN201937568U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205566639U Expired - Fee Related CN201937568U (en) | 2010-10-11 | 2010-10-11 | Serial port query management check instruction type automatic wire holder for household electric appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818985A (en) * | 2012-09-10 | 2012-12-12 | 中国航空工业集团公司第六三一研究所 | BIT (Built-In Test) circuit of multipath ground/open discrete magnitude input signal |
-
2010
- 2010-10-11 CN CN2010205566639U patent/CN201937568U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818985A (en) * | 2012-09-10 | 2012-12-12 | 中国航空工业集团公司第六三一研究所 | BIT (Built-In Test) circuit of multipath ground/open discrete magnitude input signal |
| CN102818985B (en) * | 2012-09-10 | 2014-09-24 | 中国航空工业集团公司第六三一研究所 | BIT (Built-In Test) circuit of multipath ground/open discrete magnitude input signal |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20111011 |