CN201359690Y - General-purpose multiplex relay control system - Google Patents
General-purpose multiplex relay control system Download PDFInfo
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- CN201359690Y CN201359690Y CNU2008201715675U CN200820171567U CN201359690Y CN 201359690 Y CN201359690 Y CN 201359690Y CN U2008201715675 U CNU2008201715675 U CN U2008201715675U CN 200820171567 U CN200820171567 U CN 200820171567U CN 201359690 Y CN201359690 Y CN 201359690Y
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Abstract
The utility model discloses a general-purpose multiplex relay control system, which comprises a processing unit with a peripheral circuit, a relay control circuit, a display output circuit, a TTL signal output circuit, a control signal input circuit, a decoding circuit, a user memory, a power circuit and a filter circuit; wherein the processing unit and the peripheral circuit thereof are used to centrally process information, and are the core part of the control system; the relay control circuit is used to control the pick-up and release of a relay and the isolated output of the relay; the display output circuit is used to control the display of LED displays and LED indicator lights; the control signal input circuit which is used to input an external signal consists of a CAN bus circuit, an RS23 bus circuit, a TTL signal input circuit and keys; the decoding circuit is used to selectively switch on any one of the relay control circuit, the display output circuit, the TTL signal output circuit and the control signal input circuit; the user memory is used to store the parameters set by a user; and the power circuit and the filter circuit are used to provide power and filter. The utility model has the advantages of design time saving, complete functions, convenient use and wide application range.
Description
Technical field
The utility model relates to a kind of relay-operated controller, especially a kind of General Multiplex relay control system.
Background technology
A lot of with relay at present as the electronic product of output, but the function of these electronic products all is specific, and also the circuit of relay control section is the part of whole electron product circuit.Make a general survey of the control circuit of relay, all be identical mostly, the decision condition that just determines it when to move is ever-changing, have plenty of that temperature just determines, have plenty of time decision that the people pushes button, have plenty of remote transmission instruction decision or the like, Protean condition has just formed Protean electronic circuit, can't be general, for use is made troubles, and when design hardware, need the expensive time.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of General Multiplex relay control system of saving design time, telotism, easy to use, applied range.
The technical scheme in the invention for solving the above technical problem is: this control system comprises
Processing unit and peripheral circuit thereof are used to focusing on of the information of carrying out, and are the core components of control system, wherein are provided with factory's storer in the peripheral circuit, are used to store factory's parameter;
Control relay circuit is used for the isolation output of the adhesive of pilot relay and release, relay;
Display output circuit is used to control the demonstration of charactron and LED light;
The TTL signal output apparatus;
The control signal input circuit is used to import external signal, and this circuit comprises CAN bus circuit, RS232 bus circuit, TTL signal input circuit and button;
Decoding scheme is used for selecting to be communicated with arbitrary circuit of control relay circuit, display output circuit, TTL signal output apparatus or control signal input circuit;
The user uses storer, is used to store the parameter that the user is provided with;
Power circuit and filtering circuit are used to provide power supply and carry out filtering;
The output terminal of TTL signal input circuit, Transistor-Transistor Logic level parallel port are connected by data line is unidirectional with the input end of TTL signal output apparatus;
Be connected by data line is two-way between the input/output terminal of processing unit and the Transistor-Transistor Logic level parallel port;
Be connected by data line is two-way between processing unit and the CAN bus circuit;
Be connected by data line is two-way between processing unit and the RS232 bus circuit;
Be connected by data line is unidirectional between processing unit and the button;
Be connected by data line is unidirectional between the output terminal of processing unit and the input end of control relay circuit;
Be connected by data line is unidirectional between the output terminal of processing unit and the input end of display output circuit.
Be connected with address wire between RS232 bus circuit described in the utility model, user memory and the processing unit; Described CAN bus circuit, button, Transistor-Transistor Logic level parallel port, control relay circuit, display output circuit are by being connected with address wire between decoding scheme and the processing unit.
TTL described in the utility model parallel port circuit is 8.
Button described in the utility model is 3, is used for the keyboard input.
Not with the FRAM of write-protect switch, factory is the E of band write-protect switch with storer to user described in the utility model with storer
2ROM.
The utility model compared with prior art has following beneficial effect: 1, combine the common ground of a lot of relay control products, can be used as general part and use, to realize relay control, simplified design time; 2, powerful complete, can use as an independent complete machine, also can be used as Embedded control system and use; 3, each ingredient of circuit is relatively independent, can delete as required, uses more flexible; 4, output relay is many, can reach 8 groups, and independent the use, power big (6A 250VAC and 6A 30VDC), and use occasion is extensive; 5, control mode is versatile and flexible, is easy to expansion and uses; 6, can realize the protocol conversion of CAN bus and RS232, use as protocol converter.
Description of drawings
Fig. 1 is a functional block diagram of the present utility model.
Fig. 2 is the circuit diagram of write-protect circuit in processing unit and the peripheral circuit thereof.
Fig. 3 is the circuit diagram of crystal oscillating circuit in processing unit and the peripheral circuit thereof.
Fig. 4 is the memory-aided circuit diagram of reset circuit and factory in processing unit and the peripheral circuit thereof.
Fig. 5 is the circuit diagram of single-chip microcomputer in processing unit and the peripheral circuit thereof.
Fig. 6 is the circuit diagram of control relay circuit.
Fig. 7 is the circuit diagram of used relay in the control relay circuit.
Fig. 8 is the circuit diagram of used Relay Link Port in the control relay circuit.
Fig. 9 is the circuit diagram of charactron part in the display output circuit.
Figure 10 is the circuit diagram of TTL signal output apparatus and TTL signal input circuit.
Figure 11 is the circuit diagram of voltage sampling circuit in the CAN bus circuit.
Figure 12 is the circuit diagram of crystal oscillating circuit in the CAN bus circuit.
Figure 13 is the circuit diagram of bus transceiver in the CAN bus circuit.
Figure 14 is the circuit diagram that bus ground is handled in the CAN bus circuit.
Figure 15 is the circuit diagram of bus control system in the CAN bus circuit.
Figure 16 is the circuit diagram of bus build-out resistor in the CAN bus circuit.
Figure 17 is the circuit diagram of bus interface in the CAN bus circuit.
Figure 18 is the circuit diagram of RS232 bus circuit and button part.
Figure 19 is the circuit diagram of decoding scheme and LED light part.
Figure 20 is the circuit diagram of user memory.
Figure 21 is the circuit diagram of button and charactron part.
Figure 22 is the circuit diagram of power circuit.
Figure 23 is the circuit diagram of filtering circuit.
Embodiment
Referring to Fig. 1, present embodiment comprises:
Processing unit and peripheral circuit thereof are used to focusing on of the information of carrying out, and are the core components of The whole control system, wherein are provided with factory's storer in the peripheral circuit, use for factory, and be E
2ROM's, be used to store factory's parameter, the band write-protect switch;
Control relay circuit is used for the isolation output of the adhesive of pilot relay and release, relay;
Display output circuit is used to control the demonstration of charactron and LED light;
The TTL signal output apparatus;
The control signal input circuit is used to import external signal, and this circuit comprises CAN bus circuit, RS232 bus circuit, 8 TTL signal input circuits and 3 buttons;
Decoding scheme is used for selecting to be communicated with arbitrary circuit of control relay circuit, display output circuit, TTL signal output apparatus or control signal input circuit, and decision is by which partial circuit work;
The user uses storer, uses for the user, and be FRAM, be used to store the parameter that the user is provided with, be not with write-protect switch;
Power supply and filtering circuit are used to provide power supply and carry out filtering.
The output terminal of TTL signal input circuit, Transistor-Transistor Logic level parallel port are connected by data line is unidirectional with the input end of TTL signal output apparatus; Be connected by data line is two-way between the input/output terminal of processing unit and the Transistor-Transistor Logic level parallel port; Be connected by data line is two-way between processing unit and the CAN bus circuit; Be connected by data line is two-way between processing unit and the RS232 bus circuit; Be connected by data line is two-way between processing unit and the button; Be connected by data line is unidirectional between the output terminal of processing unit and the input end of control relay circuit; Be connected by data line is unidirectional between the output terminal of processing unit and the input end of display output circuit.
Directly be connected with address wire between RS232 bus circuit, user memory and the processing unit; CAN bus circuit, button, Transistor-Transistor Logic level parallel port, control relay circuit, display output circuit are by being connected with address wire indirectly between decoding scheme and the processing unit.Processing unit visits these circuit by the addressing of different addresses.From the trend of address wire, all be unidirectional, promptly from processing unit to other each modular circuits.
Its principle of work is: control signal is from the CAN bus circuit, the RS232 bus circuit, the TTL signal input circuit, any input mode in the button is communicated to processing unit by the decoding scheme gating, processing unit receives these information and handles, then by the decoding scheme result that deals with, result can be gating control corresponding output (TTL signal output apparatus or control relay circuit), also can be display process result (display output circuit), also can be the storage data, can also be to realize protocol conversion (CAN bus circuit and RS232 bus circuit).
Referring to Fig. 2～Fig. 5, in processing unit and peripheral circuit thereof:
Processing unit adopts the MCS-51 Series chip, so long as and the single-chip microcomputer of the 40 pin dip compatibilities of standard MCS-51 all can use, that present embodiment is selected for use is AT89C52.Single-chip microcomputer is the core of The whole control system, and all information processings and decision-making are all here carried out, and single-chip microcomputer needs coding and writes with programmable device, and written program has determined the content that it is worked.The peripheral circuit of single-chip microcomputer indispensability has crystal oscillating circuit C1, C2 and Y1, and concrete parameter can be selected as required, and as using the RS232 serial communication, general C1 and C2 are the electric capacity of 22～33 pico farads, and Y1 is the crystal oscillator of 11.0592M hertz.The peripheral circuit of single-chip microcomputer indispensability also has reset circuit, and reset circuit can realize with the combination of resistance capacitance in less demanding occasion, but the chip that resets of commercialization is also arranged.Present embodiment uses high performance chips CAT1021, CAT1021 is integrated manual reset input, height two point calm down a signal output (reset signal level is optional, considers that the MCS-51 single-chip microcomputer is that 5V resets, and selects the reset level of 4.5V for use), be with write-protected I
2The multiple function of the E2ROM of 128 bytes of C interface, 1.6 seconds WDTs (the SDA pin is held concurrently).
S1 is artificial reset key among Fig. 4, presses it and will cause reset signal of chip CAT1021 output, and resistance R 7 and R1 guarantee the correct of reset signal.Wherein the RESET pin that resets of high level uses for the MCS-51 single-chip microcomputer, and low level resets/and the RESET pin uses for independent CAN bus control system SJA1000.SDA and SCL pin are I
2The order wire of C bus, resistance R 8, R9 guarantee that communication is normal.Because general MCS-51 single-chip microcomputer does not have special I
2C bus interface, so I
2The C bus generally realizes by software simulation.I
2The C bus is the E of 128 bytes among the chip CAT1021
2The communication port of ROM passes through I
2The C bus just can realize E
2The read-write operation of ROM.E
2The write-protect pin of ROM is the WP pin, it when high level, E
2ROM forbids writing, and therefore specially having designed chip CAT1021 write-protect circuit realizes E
2The write-protect function of ROM.The pin 2 of a DIP switch SW 1 and 3 is communicated with, just realizes write-protect, the pin 2 of a DIP switch SW 1 and 1 is communicated with E
2ROM just can write.E among the chip CAT1021
2Why ROM will design write-protect like this, is because of E among the chip CAT1021
2Whether ROM is that design is used for depositing important factory's parameter, prevent the mistake modification, can detect write-protect with software during use and add.In addition, chip CAT1021 also has non-maskable watchdog function, is used for monitoring whether single-chip microcomputer crashes, and the pin of feeding dog is SDA.If within 1.6 seconds, SDA does not have level to change (high level arrives high level to low level or low level), and chip CAT1021 just will export reset signal one time so.During actual the use, single-chip microcomputer will refresh the SDA pin within 1.6 seconds.
Referring to Fig. 6～Fig. 8, in control relay circuit:
Control relay circuit is made up of two chips: 74HC245 and ULN2803.Acting as of chip 74HC245 strengthens driving force and realizes the addressing that relay is controlled.Chip ULN2803 is 8 road Darlington transistor circuit, can the bigger electric current of drive ratio, be used for the line bag power supply of pilot relay.Chip ULN2803 input end (IN1～when IN7) being high level, the Darlington transistor conducting, corresponding output pin (OUT1～OUT8) approach ground, this moment, relay line Bao Yiduan was supply voltage+Vpower, and an end is ground, and the relay adhesive is done in the line job contract.Enabling of chip 74HC245 is controlled, to come gating by decoding scheme, in case chip 74HC245 is by gating, then the Transistor-Transistor Logic level of A mouth is just exported rear drive ULN2803 by the B mouth, and is not selected as fruit chip 74HC245, then chip 74HC245 is output as high-impedance state, A mouth and B mouth are isolated, and the level of chip ULN2803 input is pulled down to low level by resistance R 45, R47, R49～R53, R55, not conducting of Darlington transistor, and then relay line bag is not worked not adhesive of relay.Relay control will be addressed based on following consideration: after MCS-51 resets, program begins to carry out, though time is very short between this, but the output of all I/O mouths is high level, if the I/O mouth is directly connected chip ULN2803, even article one program with regard to closed relay, but still might cause chip ULN2803 all to be switched on, then the whole adhesives of relay, this is that not allow also be irrational in control.Add the addressing of chip 74HC245, single-chip microcomputer will be in specific address could pilot relay, at this moment single-chip microcomputer has been worked, can be safely, reasonably pilot relay work.The output of relay all be independently and the power supply of general-purpose control system without any relation, can realize the control of 220V alternating current equipment like this.Relay is selected HF41F series for use, and this relay volume is little, and power is (6A, 250VAC and 6A, 30VDC) greatly, can reduce the area of wiring board.What adopted the connectivity port of relay is 5.08 millimeters interval connectors of 3 pin *, 2 rows of 6 cores, adopts screw, screw thread combination, is easy to install, and installs firmly.
Referring to Fig. 9, present embodiment has adopted static display packing, and chip used is the mode of four 74HC595 series connection, and such benefit is to save the quantity of control line, and what charactron was used is common sun level.Also can adopt other display output circuits to carry out charactron shows.
Referring to Figure 10, in TTL signal input circuit and TTL signal output apparatus:
The Transistor-Transistor Logic level signal realizes that by a chip 74HC245 gating of chip 74HC245 also is to want addressing, and the level of its 1st pin comes to determine as required in addition, and when the 1st pin is a high level, the TTL signal outputs to the B mouth from the A mouth; When the 1st pin is a low level, the TTL signal is input to the A mouth from the B mouth; And the P1 mouth of A mouth and single-chip microcomputer links to each other.As long as single-chip microcomputer is gating chip 74HC245 like this, decided by the 1st pin of chip 74HC245 and utilizes it to come reading of data (the 1st pin is a low level) or output signal (the 1st pin is a high level).The B mouth of chip 74HC245 directly links to each other with the female seat of one 9 pin RS-232 serial ports DB9, and main like this is to consider the easily buying of DB9 seat and head, and installs firmly.During use, as long as link to each other with female seat with the line of DB9 male.In addition, the 9th pin of DB9 female seat can also provide the power supply of a VCC (5V), and the shell of DB9 female seat is exactly, and the control system that links to each other with it can connect VCC (5V) power supply in addition more like this, and is very convenient.
Referring to Figure 11～Figure 17, in CAN bus circuit and interface circuit thereof:
What the CAN bus circuit adopted is that chip SJA1000 is as control system, chip CTM8251T is as transceiver, in chip SJA1000, the reset signal of the 17th pin is provided by chip CAT1021, rather than single-chip microcomputer, chip SJA100 the 4th pin is subjected to the control of single-chip microcomputer, and chip the 16th pin is responsible for providing look-at-me to single-chip microcomputer.
5.08 millimeters interval connectors of 5 pin *, 2 rows of shared one 10 core of CAN bus interface and power interface adopt screw, screw thread combination, are easy to install, and install firmly.The CAN bus is provided with two group interfaces altogether, and function is the same, and the purpose that is provided with two groups is can allow control system become the intermediate node of CAN node easily and do not need extra separated time from the CAN bus to come out.
Referring to Figure 18, in RS232 bus circuit and key circuit: the chip that RS232 selects for use is MAX232, and connector is the male seat of DB9.Because button links to each other with chip 74HC244,, and chip 74HC244 is inner drop-down, therefore, pull-up resistor is essential.
Referring to Figure 19, in decoding scheme and LED light circuit, because decoding realizes by chip 74HC138, can gating SJA1000 (/C/SCAN), the 74HC245 of Transistor-Transistor Logic level input and output (/C/SEXP1), the 74HC245 of pilot relay work (/C/SKC), the button input (/C/SKEY), group of four figures pipe show (/C/SLED) and three LED signal lamps.8 above-mentioned passages can only gating one a time, and acquiescence is the 7th passage gating (the 7th pin).The effect of three LED light be IDEL (free time, the gating of acquiescence, Chang Liang), BUSY (hurrying) and ERR (mistake).
Referring to Figure 20, with in the storer, user memory is I the user
2The FRAM FM24C04 of C bus interface, capacity are 256 bytes, and the FRAM data are non-volatile, do not have the restriction write number of times, do not use write-protect function (this function of chip belt, but do not use); Can also be used as the data-carrier store of system uses.2nd, 3 address pin all connect high level, like this at I
2In the C bus addressing can with the E among the CAT1021
2ROM makes a distinction.
Referring to Figure 21, in the addressing circuit that button, charactron show, because charactron is static, all the time can show, and be output only, and keyboard generally all to be the mode of scanning discern, be only to import, therefore under the less situation of mouth line, utilize chip 74HC244 just can realize that charactron shows and button identification with 3 mouth lines.Chip 74HC244 contains independently two 4 line drives, is (the A mouth is to the Y mouth) of one-way transmission, and therefore, the control line of charactron is connected on the output terminal of chip 74HC244, and the connecting line of button is connected on the input end of chip 74HC244.
Referring to Figure 22 and Figure 23, power circuit mainly provides reliable and stable power supply, present embodiment DC-DC power module, the voltage of input can come to determine as required, select then coupling, output require be 5V's and electric current be not less than the power module of 500mA.Simultaneously, input voltage will combine with the driving voltage of relay line bag, and the driving voltage of relay line bag wants outside voltage to provide.The effect of diode is to prevent short circuit, and selection is that will consider it withstand voltage is about the twice of input voltage.Filtering circuit mainly is the high frequency interference of removing in the circuit, and generally each chip is equipped with one, and unnecessary distributes everywhere at circuit.
The example that is applied as with the CAN bus:
Earlier control system is installed, the control system external voltage is input as direct current 12V, and the operation voltage of relay be direct current 12V also, connects the direct current of 12V, start, and whether observation IDEL pilot lamp Chang Liang.After errorless, the 1st～5 tunnel direct current generator that meets 24V, 2A in No. 8 relays, the 6 the tunnel connects warning horn, and the 7 the tunnel connects stand by lamp, and the 8 the road reserve need not.The TTL input/output port is as input usefulness, and what connect is the pilot signal of No. 5 motors, and is high normal, and low the warning ignored for remaining 3.Set the parameter (ACR and AMR etc.) of the CAN bus of control system, store the E of factory into
2In the ROM storer.Same then method is installed 5 groups.
Control system is connected on the CAN bus, so links to each other with the operating terminal of the band CAN bus of far-end.
In the far-end operation terminal, selected the 1st set control system, the 1st set control system is sent the instruction of the No. 1 relay adhesive, control system receives instruction back action the No. 1 relay, relay drives motor action, control panel monitors the pilot signal of the No. 1 motor simultaneously, and the information that monitored to the operating terminal feedback by the CAN bus every 1 second.If monitor motor abnormality, adhesive immediately the 6th and the No. 7 relay are alarmed, and warning information is passed to operating terminal by the CAN bus.Same method can be controlled other relay work of other group.
The example that is applied as with the RS232 bus:
Earlier control system is installed, the general-purpose control system external voltage is input as direct current 9V, and the operation voltage of relay be direct current 9V also, connects the direct current of 9V, start, and whether observation IDEL pilot lamp Chang Liang.RS232 connects the new GPRS module of TC35TS, and the TTL input/output port is done input and used, and monitors 8 tunnel voltage, high normal, the low warning.The output of No. 8 relays connects 8 the tunnel and is monitored the 220V that move each self-corresponding back of makeing mistakes of voltage, the alternating current generator of 1A.The phone number that utilizes 3 keyboard input GPRS modules to send on general-purpose control system stores into (phone number will allow user's modification) in the user FRAM storer.
When control system detects the 3 the road unusually, light the LED light of ERR immediately, send the mobile phone that corresponding code sends to appointment by RS232 to the GPRS module simultaneously, move the No. 3 relay simultaneously, drive machine operation.
Claims (5)
1, a kind of General Multiplex relay control system is characterized in that: comprise
Processing unit and peripheral circuit thereof are used to focusing on of the information of carrying out, and are the core components of control system, wherein are provided with factory's storer in the peripheral circuit, are used to store factory's parameter;
Control relay circuit is used for the isolation output of the adhesive of pilot relay and release, relay;
Display output circuit is used to control the demonstration of charactron and LED light;
The TTL signal output apparatus;
The control signal input circuit is used to import external signal, and this circuit comprises CAN bus circuit, RS232 bus circuit, TTL signal input circuit and button;
Decoding scheme is used for selecting to be communicated with arbitrary circuit of control relay circuit, display output circuit, TTL signal output apparatus or control signal input circuit;
The user uses storer, is used to store the parameter that the user is provided with;
Power circuit and filtering circuit are used to provide power supply and carry out filtering;
The output terminal of TTL signal input circuit, Transistor-Transistor Logic level parallel port are connected by data line is unidirectional with the input end of TTL signal output apparatus;
Be connected by data line is two-way between the input/output terminal of processing unit and the Transistor-Transistor Logic level parallel port;
Be connected by data line is two-way between processing unit and the CAN bus circuit;
Be connected by data line is two-way between processing unit and the RS232 bus circuit;
Be connected by data line is unidirectional between processing unit and the button;
Be connected by data line is unidirectional between the output terminal of processing unit and the input end of control relay circuit;
Be connected by data line is unidirectional between the output terminal of processing unit and the input end of display output circuit.
2, General Multiplex relay control system according to claim 1 is characterized in that: be connected with address wire between described RS232 bus circuit, user memory and the processing unit; Described CAN bus circuit, button, Transistor-Transistor Logic level parallel port, control relay circuit, display output circuit are by being connected with address wire between decoding scheme and the processing unit.
3, General Multiplex relay control system according to claim 1 and 2 is characterized in that: described TTL parallel port circuit is 8.
4, General Multiplex relay control system according to claim 1 and 2, it is characterized in that: described button is 3, is used for the keyboard input.
5, General Multiplex relay control system according to claim 1 is characterized in that: not with the FRAM of write-protect switch, factory is the E of band write-protect switch with storer to described user with storer
2ROM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201715675U CN201359690Y (en) | 2008-12-31 | 2008-12-31 | General-purpose multiplex relay control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201715675U CN201359690Y (en) | 2008-12-31 | 2008-12-31 | General-purpose multiplex relay control system |
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| Publication Number | Publication Date |
|---|---|
| CN201359690Y true CN201359690Y (en) | 2009-12-09 |
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| CNU2008201715675U Expired - Fee Related CN201359690Y (en) | 2008-12-31 | 2008-12-31 | General-purpose multiplex relay control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731976A (en) * | 2013-12-13 | 2014-04-16 | 郑州宇通客车股份有限公司 | PCB compatible with at least two watchdog circuits |
| CN103809473A (en) * | 2013-12-24 | 2014-05-21 | 兰州空间技术物理研究所 | Spatial high-voltage relay array applied to electric propulsion system |
| CN103901846A (en) * | 2014-03-20 | 2014-07-02 | 成都微英威诺环境监控设备有限公司 | Intelligent bi-directional short message control device based on GSM network |
| CN104010120A (en) * | 2014-06-06 | 2014-08-27 | 江苏中讯电子科技有限公司 | Multifunctional web camera |
| CN107465332A (en) * | 2017-05-23 | 2017-12-12 | 深圳市鸿哲智能系统工程有限公司 | A kind of 8 rail road power-supply controller of electric |
-
2008
- 2008-12-31 CN CNU2008201715675U patent/CN201359690Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731976A (en) * | 2013-12-13 | 2014-04-16 | 郑州宇通客车股份有限公司 | PCB compatible with at least two watchdog circuits |
| CN103809473A (en) * | 2013-12-24 | 2014-05-21 | 兰州空间技术物理研究所 | Spatial high-voltage relay array applied to electric propulsion system |
| CN103809473B (en) * | 2013-12-24 | 2016-08-17 | 兰州空间技术物理研究所 | It is applied to the space high-voltage relay array of electric propulsion system |
| CN103901846A (en) * | 2014-03-20 | 2014-07-02 | 成都微英威诺环境监控设备有限公司 | Intelligent bi-directional short message control device based on GSM network |
| CN104010120A (en) * | 2014-06-06 | 2014-08-27 | 江苏中讯电子科技有限公司 | Multifunctional web camera |
| CN104010120B (en) * | 2014-06-06 | 2017-12-15 | 江苏中讯电子科技有限公司 | Multifunctional network camera |
| CN107465332A (en) * | 2017-05-23 | 2017-12-12 | 深圳市鸿哲智能系统工程有限公司 | A kind of 8 rail road power-supply controller of electric |
| CN107465332B (en) * | 2017-05-23 | 2023-08-15 | 深圳市鸿哲智能系统工程有限公司 | 8-track power supply controller |
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