CN202050400U - Serial port junctor management check instruction type 8K paths of sensor and 28N/2 groups of household electrical appliances wire holder - Google Patents

Serial port junctor management check instruction type 8K paths of sensor and 28N/2 groups of household electrical appliances wire holder Download PDF

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CN202050400U
CN202050400U CN2010206963005U CN201020696300U CN202050400U CN 202050400 U CN202050400 U CN 202050400U CN 2010206963005 U CN2010206963005 U CN 2010206963005U CN 201020696300 U CN201020696300 U CN 201020696300U CN 202050400 U CN202050400 U CN 202050400U
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8bit
circuit
shift register
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signal input
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曾艺
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Chongqing Technology and Business University
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Abstract

A serial port junctor management check instruction type 8K paths of sensor and 28N/2 groups of household electrical appliances wire holder is an interface device of a computer and household electrical appliances. The 28N/2 groups of electronic and electrical appliances are managed by combining TXD of a serial port with two junctors, and the 8K (K=1, 2, 3, etc.) paths of sensors are detected by one input junctor. The wire holder comprises an RS232 interface, a USB interface, a level converting circuit, an eight bit plus N serial-in parallel-out shift register, 28N eight bit plus N data comparator circuits, 28N/2 RS trigger circuits, 28N/2 groups of electronic switching circuits, an eight bit plus K parallel-in serial-out shift register, and a stabilized power supply circuit. RTS is used as a clock signal of the two shift registers, DTR is respectively used as a serial input signal of the eight bit plus N serial-in parallel-out shift register and a data shift/loading control signal of the eight bit plus K parallel-in serial-out shift register, TXD is used as an output allow control signal of the comparator circuits, the 28N/2 RS trigger circuits and the 28N/2 groups of electronic switching circuits are controlled by the outputs of the comparator circuits, and a serial output signal of the eight bit plus K parallel-in serial-out shift register is received by CTS. Thus the networking functions of the prior electronic and electrical appliances can be realized.

Description

Serial port interconnection management core is to instruction type 8K road transducer 2＜sup〉8N＜/sup 〉/2 groups of household electrical appliances junction blocks
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
" serial port interconnection management core is to instruction type No. 8 transducers 2 for the utility model of submitting to the same period Patent Office of State Intellectual Property Office to examine 8N/ 2 groups of household electrical appliances junction blocks " have identical technical foundation with " serial port interconnection management core is to 128 groups of household electrical appliances junction blocks of instruction type 8K road transducer ": on the one hand; rely on an input interconnection of serial port to detect multi-path digital amount output type transducer; on the other hand; two output interconnections by serial port are sent out the binary data instruction; and send the output of data wire TXD control data instruction with it; adopt the data comparator technology, management many groups domestic electronic and electrical equipment.
Summary of the invention
The purpose of this utility model is to provide a kind of serial port interconnection management core to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks are the interface arrangements between a kind of computer and the home electronic appliance, and it is main frame with the computer, and application data comparator technology is used the two output interconnections and the transmission data wire TXD management 2 of its serial port 8N/ 2 (N=1,2,3 ...) and group domestic electronic and electrical equipment, simultaneously, rely on an input interconnection of serial port detect 8K (K=1,2,3 ...) and the output state of road digital quantity output type transducer; Comprise: RS232C interface, USB interface, USB change the serial port circuit,
Figure BSA00000406484200011
Level shifting circuit, 8bit * N SI PO shift register, 2 8NIndividual 8bit * N data comparator circuit, 2 8N/ 2 rest-set flip-flop circuit, 2 8N/ 2 groups of electronic switching circuits, 8bit * K incorporate into go here and there out shift register, 8K (K=1,2,3 ...) and to sensor terminals, voltage-stabilized power supply circuit, anti-lightning strike and surge circuit and power line 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 5th pin GND of RS232C interface is connected to power cathode, and its 4th pin DTR, the 7th pin RTS, the 3rd pin TXD are connected respectively to
Figure BSA00000406484200012
A RS232C level signal input of level shifting circuit, the TTL/CMOS level signal output of the corresponding RTS of this level shifting circuit is connected respectively to 8bit * N SI PO shift register and 8bit * K to be incorporated into and goes here and there out the clock signal input terminal of shift register, the TTL/CMOS level signal output of the corresponding DTR of this level shifting circuit is connected respectively to serial signal input of 8bit * N SI PO shift register and 8bit * K to be incorporated into and goes here and there out the parallel input data displacement/loading control end of shift register, and the TTL/CMOS level signal output of this level shifting circuit correspondence TXD is connected to 2 8NThe comparative result A=B signal output of individual 8bit * N data comparator circuit allows control end
Figure BSA00000406484200021
Also connect a pull-up resistor to positive source; The 8th pin CTS of serial port is connected to
Figure BSA00000406484200022
A RS232C level signal output of level shifting circuit, the TTL/CMOS level signal input of corresponding therewith this level shifting circuit are connected to 8bit * K to be incorporated into and goes here and there out the serial signal output of shift register; 8 * N signal output part of 8bit * N SI PO shift register (for example: Q 15Q 14... Q 2Q 1Q 0(N=2)) with 2 8NOne group of comparison signal input of individual 8bit * N data comparator circuit (for example: A 15A 14... A 2A 1A 0(N=2)) in parallel in regular turn, 2 8N2 of individual 8bit * N data comparator circuit 8NIndividual comparative result A=B signal output part connects a pull down resistor respectively to power cathode, also is connected to 2 in regular turn respectively 8N2 of/2 rest-set flip-flop circuit 8N/ 2 opposed 1 end S and reset terminal R; 2 8N2 of/2 rest-set flip-flop circuit 8N/ 2 output Q are connected respectively to the signal input end of one group of electronic switching circuit; 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 power line and plug thereof.
8bit * N SI PO shift register is made up of the cascade of N piece 8bit SI PO shift register.
8bit * K incorporates into and goes here and there out shift register and be made up of K piece 74HC165 cascade, their sheet choosing end is all received power cathode, its clock signal input terminal all links together, constitute the clock signal input terminal of described shift register, the 1st cascade carry signal input DS receives the positive pole of power supply, its serial signal output Q HBe connected to the 2nd serial signal input B, the 2nd serial signal output Q HBe connected to the 3rd cascade carry signal input DS, and the like, the serial signal output Q of K-1 piece HBe connected to the cascade carry signal input DS of K piece, the serial signal output Q of K piece HSerial signal output as described shift register; The 8K of described shift register parallel signal input connects a pull-up resistor respectively to positive source, also respectively with power cathode constitute 8K (K=1,2,3 ...) and to sensor terminals.
2 8NIndividual 8bit * N data comparator circuit is by 2 8NIndividual 8bit * N binary data comparator is formed, and each 8bit * N binary data comparator has two groups of comparison signal inputs, for example: A 15A 14... A 2A 1A 0And B 15B 14... B 2B 1B 0(N=2), one group of comparison signal input of each 8bit * N binary data comparator, for example: A 15A 14... A 2A 1A 0(N=2), in parallel in regular turn respectively, constitute 2 8NOne group of comparison signal input of individual 8bit * N data comparator circuit, for example: A 15A 14... A 2A 1A 0(N=2); Another group comparison signal input of each 8bit * N binary data comparator, for example: B 15B 14... B 2B 1B 0(N=2), be connected respectively to the common port of a single-pole double-throw switch (SPDT), so have 8 * N * 2 8NIndividual single-pole double-throw switch (SPDT), the two ends in addition of these single-pole double-throw switch (SPDT)s are connected respectively to positive source and power cathode; Each 8bit * N binary data comparator also has the signal output part of a comparative result A=B and a comparative result A=B signal output to allow control end
Figure BSA00000406484200031
The former high level is effective, constitutes 2 altogether 8N2 of individual 8bit * N data comparator circuit 8NIndividual comparative result A=B signal output part, latter's low level is effective, each
Figure BSA00000406484200032
Parallel connection constitutes 2 8NThe comparative result A=B signal output of individual 8bit * N data comparator circuit allows control end
Figure BSA00000406484200033
8bit * N binary data comparator is formed by the combination of 8bit binary data comparator, and a 8bit binary data comparator is formed by the combination of 4bit binary data comparator.
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.
Anti-lightning strike and surge circuit is made up of a fuse and a piezo-resistance polyphone.
Figure BSA00000406484200034
Level shifting circuit is made up of in conjunction with four electrochemical capacitors two MAX232.
2 8N/ 2 groups of electronic switching circuits comprise 2 8N/ 2 groups of electronic switching circuits, each structure of organizing electronic switching circuit is identical, comprises separately: No. 1 alternating current electronic switching circuit and 1 road light current electronic switching circuit.
The 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 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 group 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, its base stage and collector resistance, the collector electrode series connection of light-emitting diode and 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 alternating current electronic switching circuit.
The light current 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 group 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 light current electronic switching circuit.
The utility model has constituted the interface between computer and the home electronic appliance.On the one hand, it is with two output interconnection output order data of serial port, and to send the output of data wire control command data, and the word length of the concatenation technology extended instruction of employing SI PO shift register, binding data comparator technology again can be expanded the number of the electronic apparatus that needs management as required.On the other hand, its adopts to incorporate into and goes here and there out the concatenation technology of shift register, only uses an input interconnection just can detect the state of 8K Sensor of Switch-Output Type.Its advantage is: described method is more complete, do not need to adopt the one chip microcomputer chip, be particularly suitable for these three unit combination of a comparator circuit, rest-set flip-flop and electronic switch to single electrical equipment itself, be used for the existing electrical equipment of upgrading, make it to adapt to network management.
Description of drawings
Below in conjunction with accompanying drawing, further specify the utility model.
Fig. 1 is the sensor interface circuitry part of circuit theory diagrams of the present utility model, wherein, and K=2, S 16..., S 01Representative sensor.
Fig. 2 is the transmission data command part of circuit theory diagrams of the present utility model, the situation of corresponding N=2.
Fig. 3 is the schematic diagram of one group of electronic switching circuit.
Fig. 4 is made of the circuit theory diagrams of a 8bit binary data comparator 4bit binary data comparator.
Among the figure, 001.-32768. electronic switching circuit, 11., 12.
Figure BSA00000406484200041
Level shifting circuit, 13., the 14.8bit SI PO shift register, 15.2 8NThe individual rest-set flip-flop circuit of/2 (=65536/2=32768 (N=2)), 16., 17.8bit incorporates into and goes here and there out shift register, 31. single-pole double throw direct current electromagnetic relay, 32. solid-state relay SSR, 5. voltage-stabilized power supply circuit, 51. anti-lightning strike and surge circuit, 6.USB interface, 7.USB change the serial port circuit, 8.RS232C interface, 9.2 8NIndividual 8bit * N data comparator circuit, 91.-93.4bit binary data comparator.
Embodiment
By 8bit incorporate into go here and there out shift register (16), (17) cascade form 8bit * K incorporate into go here and there out shift register (K=2) method as shown in Figure 1.
The method of forming 8bit * N SI PO shift register (N=2) by 8bit SI PO shift register (13) and (14) cascade as shown in Figure 2.Wherein, being in highest order in the output of the 74HC164 (13) than low level is connected to of the 74HC164 (14) that is in high bit and seals in signal input part B.
The method of forming a 8bit binary data comparator with 3 tetrad data comparator integrated circuits (91), (92) and (93) as shown in Figure 4.Among the figure, one group of data input pin A of comparator (92) and (91) 3A 2A 1A 0, A 3A 2A 1A 0Constituted one group of comparison signal input A of this comparator successively 7A 6A 5A 4A 3A 2A 1A 0Another group data input pin B of comparator (92) and (91) 3B 2B 1B 0, B 3B 2B 1B 0Constituted another group comparison signal input B of this comparator successively 7B 6B 5B 4B 3B 2B 1B 0, they come the prepositioned instruction sign indicating number by eight single-pole double-throw switch (SPDT)s.Utilize one group of data input pin B of comparator (93) 3B 2B 1B 0Highest order B 3Constitute the output of comparative result A=B signal and allow control end If promptly
Figure BSA00000406484200052
The A=B signal output part of comparator (93) is always low level.Therefore, the pull down resistor R among Fig. 2 000..., R 65535Can.
According to above-mentioned principle, a 8bit * N data comparator can be formed by several 8bit binary data comparator combinations, and 2 8NIndividual 8bit * N data comparator circuit (9) can be by 2 8NIndividual 8bit * N data comparator composes in parallel.
Obviously, can influence 8bit * N in the time of operation 8bit * N SI PO shift register (13) and (14) incorporates into and goes here and there out the operating state of shift register (16) and (17), at this moment, we do not go to be concerned about that the event attribute of serial communication control MSComm32.OCX is just passable.And operation 8bit * N incorporates the operating state that also can influence 8bit * N SI PO shift register (13) and (14) when going here and there out shift register (16) and (17) into, at this moment, as long as serial port data transmission line TXD does not send any data, serial port sends line and is in high level: TXD=1 at ordinary times, just can be so that 2 8NThe comparative result A=B signal output of individual 8bit * N data comparator circuit (9) allows control end Be in the high level disarmed state, therefore, they are 2 years old 8NIndividual comparative result A=B signal output part all is in low level state, does not influence 2 8NEach of/2 (=65536/2=32768 (N=2)) individual rest-set flip-flop circuit (15) guaranteed that to R, S control end misoperation does not take place in electronic switching circuit (001)-(32768).
Operation 8bit * N incorporates into and goes here and there out shift register (16) and (17) and need utilize the event attribute of serial communication control MSComm32.OCX, and comprising: 1) ComEvSend: the number of characters in the transmission register also lacks than Sthreshold; 2) ComEv Receive: receive Sthreshold character, this incident continues to produce up to removing from receiving register with the Input attribute; 3) state of ComEvCTS:Clear_to_Send line changes; 4) state of ComEvDSR:Data_Set_Ready line changes to 0 from 1; 5) state of ComEvCD:Carrier_Detect line changes; 6) 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) may not support this incident; 7) ComEvEOF: receive the end of data (ASCII is 26) character.

Claims (10)

1. serial port interconnection management core is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: comprise RS232C interface, USB interface, USB change the serial port circuit,
Figure FSA00000406484100011
Level shifting circuit, 8bit * N SI PO shift register, 2 8NIndividual 8bit * N data comparator circuit, 2 8N/ 2 rest-set flip-flop circuit, 2 8N/ 2 groups of electronic switching circuits, 8bit * K incorporate into go here and there out shift register, 8K (K=1,2,3 ...) and to sensor terminals, voltage-stabilized power supply circuit, anti-lightning strike and surge circuit and power line 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 5th pin GND of RS232C interface is connected to power cathode, and its 4th pin DTR, the 7th pin RTS, the 3rd pin TXD are connected respectively to A RS232C level signal input of level shifting circuit, the TTL/CMOS level signal output of the corresponding RTS of this level shifting circuit is connected respectively to 8bit * N SI PO shift register and 8bit * K to be incorporated into and goes here and there out the clock signal input terminal of shift register, the TTL/CMOS level signal output of the corresponding DTR of this level shifting circuit is connected respectively to serial signal input of 8bit * N SI PO shift register and 8bit * K to be incorporated into and goes here and there out the parallel input data displacement/loading control end of shift register, and the TTL/CMOS level signal output of this level shifting circuit correspondence TXD is connected to 2 8NThe comparative result A=B signal output of individual 8bit * N data comparator circuit allows control end
Figure FSA00000406484100013
Also connect a pull-up resistor to positive source; The 8th pin CTS of serial port is connected to
Figure FSA00000406484100014
A RS232C level signal output of level shifting circuit, the TTL/CMOS level signal input of corresponding therewith this level shifting circuit are connected to 8bit * K to be incorporated into and goes here and there out the serial signal output of shift register; 8 * N signal output part of 8bit * N SI PO shift register and 2 8NOne group of comparison signal input of individual 8bit * N data comparator circuit is in parallel in regular turn, and 2 8N2 of individual 8bit * N data comparator circuit 8NIndividual comparative result A=B signal output part connects a pull down resistor respectively to power cathode, also is connected to 2 in regular turn respectively 8N2 of/2 rest-set flip-flop circuit 8N/ 2 opposed 1 end S and reset terminal R; 2 8N2 of/2 rest-set flip-flop circuit 8N/ 2 output Q are connected respectively to the signal input end of one group of electronic switching circuit; 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 power line and plug thereof.
2. serial port interconnection management core according to claim 1 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: 8bit * N SI PO shift register is made up of the cascade of N piece 8bit SI PO shift register.
3. serial port interconnection management core according to claim 1 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks, it is characterized in that: 8bit * K incorporates into and goes here and there out shift register and be made up of K piece 74HC165 cascade, their sheet choosing end is all received power cathode, its clock signal input terminal all links together, constitute the clock signal input terminal of described shift register, the 1st cascade carry signal input DS receives the positive pole of power supply, its serial signal output Q HBe connected to the 2nd serial signal input B, the 2nd serial signal output Q HBe connected to the 3rd cascade carry signal input DS, and the like, the serial signal output Q of K-1 piece HBe connected to the cascade carry signal input DS of K piece, the serial signal output Q of K piece HSerial signal output as described shift register; The 8K of described shift register parallel signal input connects a pull-up resistor respectively to positive source, also respectively with power cathode constitute 8K (K=1,2,3 ...) and to sensor terminals.
4. serial port interconnection management core according to claim 1 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: 2 8NIndividual 8bit * N data comparator circuit is by 2 8NIndividual 8bit * N binary data comparator is formed, and each 8bit * N binary data comparator has two groups of comparison signal inputs, and one group of comparison signal input of each 8bit * N binary data comparator is in parallel in regular turn respectively, constitutes 2 8NOne group of comparison signal input of individual 8bit * N data comparator circuit; Another group comparison signal input of each 8bit * N binary data comparator is connected respectively to the common port of a single-pole double-throw switch (SPDT), so have 8 * N * 2 8NIndividual single-pole double-throw switch (SPDT), the two ends in addition of these single-pole double-throw switch (SPDT)s are connected respectively to positive source and power cathode; Each 8bit * N binary data comparator also has the signal output part of a comparative result A=B and a comparative result A=B signal output to allow control end
Figure FSA00000406484100021
The former constitutes 2 altogether 8N2 of individual 8bit * N data comparator circuit 8NIndividual comparative result A=B signal output part, latter's parallel connection constitutes 2 8NThe comparative result A=B signal output of individual 8bit * N data comparator circuit allows control end
Figure FSA00000406484100022
5. serial port interconnection management core according to claim 4 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: 8bit * N binary data comparator is formed by the combination of 8bit binary data comparator, and a 8bit binary data comparator is formed by the combination of 4bit binary data comparator.
6. serial port interconnection management core according to claim 1 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks, it is characterized in that: 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.
7. serial port interconnection management core according to claim 1 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: anti-lightning strike and surge circuit is made up of a fuse and a piezo-resistance polyphone.
8. serial port interconnection management core according to claim 1 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: 2 8N/ 2 groups of electronic switching circuits comprise 2 8N/ 2 groups of electronic switching circuits, each structure of organizing electronic switching circuit is identical, comprises No. 1 alternating current electronic switching circuit and 1 road light current electronic switching circuit separately.
9. serial port interconnection management core according to claim 8 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: the 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 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 group 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, its base stage and collector resistance, the collector electrode series connection of light-emitting diode and 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 alternating current electronic switching circuit.
10. serial port interconnection management core according to claim 8 is to instruction type 8K road transducer 2 8N/ 2 groups of household electrical appliances junction blocks is characterized in that: the light current 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 group 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 light current electronic switching circuit.
CN2010206963005U 2010-12-29 2010-12-29 Serial port junctor management check instruction type 8K paths of sensor and 28N/2 groups of household electrical appliances wire holder Expired - Fee Related CN202050400U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102571061A (en) * 2010-12-29 2012-07-11 重庆工商大学 Wire holder for serial port junctor management check instruction type 8K paths of sensors and 28N/2 groups of household electrical appliances

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102571061A (en) * 2010-12-29 2012-07-11 重庆工商大学 Wire holder for serial port junctor management check instruction type 8K paths of sensors and 28N/2 groups of household electrical appliances
CN102571061B (en) * 2010-12-29 2014-07-30 重庆工商大学 Wire holder for serial port junctor management check instruction type 8K paths of sensors and 28N/2 groups of household electrical appliances

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