CN202330385U - General gas prober with parameter setting function - Google Patents
General gas prober with parameter setting function Download PDFInfo
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- CN202330385U CN202330385U CN2011204337406U CN201120433740U CN202330385U CN 202330385 U CN202330385 U CN 202330385U CN 2011204337406 U CN2011204337406 U CN 2011204337406U CN 201120433740 U CN201120433740 U CN 201120433740U CN 202330385 U CN202330385 U CN 202330385U
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- 238000012545 processing Methods 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims description 46
- 238000002955 isolation Methods 0.000 claims description 41
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 230000002463 transducing effect Effects 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
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- 241001269238 Data Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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Abstract
The utility model provides a general gas prober with a parameter setting function. The general gas prober comprises a main control module, a 4-20 mA analogue signal output module, and an intelligent sensing signal processing module, wherein a sensing signal input end of the intelligent sensing signal processing module is used for connecting a gas sensor module; a signal output end of the intelligent sensing signal processing module is connected with a detecting signal input end of the main control module; a 4-20 mA analogue signal output end of the main control module is connected with a signal input end of the 4-20 mA analogue signal output module; and a signal output end of the 4-20 mA analogue signal output module is used for connecting with an upper computer. The general gas prober is characterized by also comprising a human-computer control module; and a signal output end of the human-computer control module is connected with a human-computer control signal input end of the main control module.
Description
Technical field:
The utility model relates to gas concentration detection apparatus, relates in particular to a kind of common gases detector with parameter setting function.
Background technology:
Gas detecting instrument is a kind of instrument of detected gas concentration, is applicable to the hazardous area that has flammable or toxic gas, and tested gas burst lower limit is with interior content in the long-term continuous detecting air of ability; Be widely used in combustion gas, petrochemical complex, metallurgy, iron and steel, coking, there is the industry-by-industry of flammable or toxic gas in electric power etc., are the desirable monitoring instruments that guarantees property and personal safety.In recent years along with rapid development of national economy, the fast development of process of industrialization, relevant industries to gas concentration monitoring also have higher requirement.The common gases detector is because the advantage of its price; Be able to use widely in industry spot; Do not need to show in real time the related data of being gathered at the scene that needs detected gas concentration; Convert the gas concentration value of being gathered into corresponding 4-20mA current signal through its 4-20mA simulating signal output module that carries and export to upper controller or current acquisition card, carry out data presentation again.But this common gas detector; Can not change inner some systematic parameters of its transducing signal intelligent processing module that carries such as sensor weight, sensor gain, the low alarming value of sensor, the high alarming value of sensor, transducer range value or the like information, operation such as setting; And; Incompatible with present digitized data transfer mode; Therefore big limitations the range of application of this common gases detector; If can on the basis of this common gases detector, add the design of parameter setting function, digitalized data transfer function,, make this common gases detector continue to play a role at the gas concentration detection range with the scope of application of expanding this common gases detector greatly.
The utility model content:
The purpose of the utility model provides a kind of common gases detector with parameter setting function; Further, the common gases detector with parameter setting function of the utility model also has the function of digitalized data transmission.
A kind of common gases detector with parameter setting function; Comprise main control module, 4 ~ 20mA simulating signal output module, transducing signal intelligent processing module; The transducing signal input end of transducing signal intelligent processing module is used to connect gas sensor module; The signal output part of transducing signal intelligent processing module connects the detection signal input end of main control module; 4 ~ 20mA analog signal output of main control module connects the signal input part of 4 ~ 20mA simulating signal output module, and the signal output part of 4 ~ 20mA simulating signal output module is used to connect host computer; Wherein: said common gases detector with parameter setting function also comprises man-machine operational module, and the signal output part of man-machine operational module connects the man-machine signal input part of controlling of main control module.
Described common gases detector with parameter setting function, wherein: described main control module adopts processor chips C8051F350.
Described common gases detector with parameter setting function; Wherein: described man-machine operational module is the code switch input circuit; Said code switch input circuit comprises four code switchs; Four code switchs comprise first, second, third, fourth code switch; The first end ground connection of first, second, third, fourth code switch, second end connect man-machine signal input part first, second, third, fourth pin of controlling of main control module respectively; Through drawing power supply in the connection of first, second, third, fourth pull-up resistor, second end of first, second, third, fourth code switch is also respectively through first, second, third, fourth capacity earth respectively for second end of first, second, third, fourth code switch.
Described common gases detector with parameter setting function; Wherein: described common gases detector with parameter setting function also comprises RS485 communication isolation module; RS485 communication isolation module one end connects 485 COM1s of main control module, and the RS485 communication isolation module other end is used to connect 485 bus type controller main frame or host computers.
Described common gases detector with parameter setting function; Wherein: described RS485 communication isolation module comprises RS485 change-over circuit, signal isolation circuit, DC/DC power isolation circuit; The first data I/O end of RS485 change-over circuit is through 485 COM1s of signal isolation circuit connection main control module, and the second data I/O end of RS485 change-over circuit connects 485 bus type controller main frame or host computers; The power input of DC/DC power isolation circuit is used to connect power supply, and the power output end of DC/DC power isolation circuit connects the power input of RS485 change-over circuit, signal isolation circuit respectively.
Described common gases detector with parameter setting function, wherein:
Said signal isolation circuit comprises first optocoupler, second optocoupler and the 3rd optocoupler; Said RS485 change-over circuit comprises the RS485 conversion chip; Said DC/DC power isolation circuit comprises the DC/DC isolating chip, and the power input of said DC/DC isolating chip is used to connect power supply, and the power output end of said DC/DC isolating chip connects the power input of signal isolation circuit, RS485 conversion chip respectively;
The negative electrode of light emitting diode is used to connect the data serial transmission pin of main control module in said first optocoupler, and anode is used to connect power supply, and the emitter of triode connects the driver input end of RS485 conversion chip, grounded collector in first optocoupler; The collector of triode is used to connect the synchronous clock pulse pin of main control module in said second optocoupler; Emitter is used to connect the power input of DC/DC isolating chip; The anode of light emitting diode connects the power output end of DC/DC isolating chip in said second optocoupler, and negative electrode connects the receiver output pin of RS485 conversion chip; The negative electrode of light emitting diode is used to connect the control signal output ends of main control module in said the 3rd optocoupler; Anode is used to connect the power output end of DC/DC isolating chip, and the collector of triode connects the driver output enable end of RS485 conversion chip in the 3rd optocoupler;
485 bus links of said RS485 conversion chip connect the corresponding link of 485 bus type controller main frames or host computer.
Described common gases detector with parameter setting function; Wherein: be connected with a current-limiting resistance on each pin of the detection signal input end connector of described main control module, each data transmission pin of the detection signal input end connector of described main control module also respectively through one be used for overvoltage protection capacity earth; Be connected with a current-limiting resistance on each pin of the signal output part connector of described transducing signal intelligent processing module, each data transmission pin of the signal output part connector of described transducing signal intelligent processing module also respectively through one be used for overvoltage protection capacity earth.
The utility model will reach following technique effect after adopting technique scheme:
The common gases detector with parameter setting function of the utility model; The main control module is through receiving the information of man-machine operational module input; To the sensor weight of transducing signal intelligent processing module, sensor gain, the low alarming value of sensor, the high alarming value of sensor, transducer range value or the like information change, operation such as setting, thereby make this common gas detector have wideer sensing range or to detect data more accurate.Further; Through 485 communication modules; Transmission mode and main control system, the host computer of testing result through digitalized data perhaps communicated between the various PLC equipment, thereby make the common gases detector with parameter setting function of the utility model have wideer communication compatibility.
Description of drawings:
Fig. 1 is the structural drawing of the common gases detector with parameter setting function of the utility model;
Fig. 2 is the circuit theory diagrams of man-machine operational module among Fig. 1;
Fig. 3 is the circuit theory diagrams of 485 communication modules among Fig. 1;
Fig. 4 is the hot plug design circuit schematic diagram of signal output part connector of detection signal input end connector and the said transducing signal intelligent processing module of main control module described in Fig. 1.
Embodiment:
A kind of common gases detector of the utility model with parameter setting function; As shown in Figure 1; Comprise main control module, 4 ~ 20mA simulating signal output module, transducing signal intelligent processing module, man-machine operational module, the RS485 isolation module of communicating by letter; The transducing signal input end of transducing signal intelligent processing module is used to connect gas sensor module; The signal output part of transducing signal intelligent processing module connects the detection signal input end of main control module; 4 ~ 20mA analog signal output of main control module connects the signal input part of 4 ~ 20mA simulating signal output module, and the signal output part of 4 ~ 20mA simulating signal output module is used to connect host computer, and the signal output part of man-machine operational module connects the man-machine signal input part of controlling of main control module; RS485 communication isolation module one end connects 485 COM1s of main control module, and the RS485 communication isolation module other end is used to connect 485 bus type controller main frame or host computers.
The main control module adopts processor chips C8051F350.
Described man-machine operational module adopts the code switch input circuit; As shown in Figure 2; Said code switch input circuit comprises four code switch SW1; Four code switch SW1 comprise first, second, third, fourth toggle switch; The first end ground connection of first, second, third, fourth toggle switch (i.e. 1 of four code switch SW1,2,3,4 pin ground connection); Second end of first, second, third, fourth toggle switch (i.e. 8 of four code switch SW1,7,6,5 pins) connects man-machine signal input part first, second, third, fourth pin (being pin P2.0,2.1, P2.2, the P2.3 of processor chips C8051F350) of controlling of main control module respectively; Second end of first, second, third, fourth toggle switch (i.e. 8 of four code switch SW1,7,6,5 pins) connects through first, second, third, fourth pull-up resistor R1, R2, R3, R4 respectively and draws power supply, and second end of first, second, third, fourth toggle switch (i.e. 8 of four code switch SW1,7,6,5 pins) also passes through first, second, third, fourth capacitor C 1, C2, C3, C4 ground connection respectively.
The code switch input circuit has common calibration value, alarming value, correlation parameter numerical coding input set-up function; The code switch input circuit organically combines and realizes from two aspects of hardware and software; Hardware aspect is as shown in Figure 2; Form with four toggle switchs (i.e. first, second, third, fourth toggle switch of four code switch SW1) and outside four pull-up resistor R1, R2, R3, R4 and four capacitor C 1, C2, C3, C4; Said toggle switch is respectively through pull-up resistor R1, R2, R3, R4 and four capacitor C 1, C2, C3, C4 corresponding connection of pin P2.0,2.1, P2.2, P2.3 with processor chips C8051F350; The left end of each toggle switch is connected with power supply ground; If when corresponding toggle switch was stirred on the right end, the voltage that is input to processor chips C8051F350 respective pin was high level, if when toggle switch toggles it to left end; The voltage that is input to processor chips C8051F350 respective pin is low level, can form following 16 kinds of signals through four toggle switchs like this:
0000,0001,0010,0011,0100; 0101,0110,0111,1000,1001; 1010,1010,1100,1110,1111; What judge four code switch SW1 inputs through the interior software of processor chips C8051F350 is any in 16 kinds of signals, makes processor chips C8051F350 handle the back and produces 16 kinds of different consequential signals, above-mentioned 16 kinds of signals of four code switch SW1 inputs is set a kind of state respectively, as be 0000 o'clock, is sample states; Being input as at 0001 o'clock, for setting low alarming value state, as is 1000 o'clock, for the input parameter state of value etc.; So realized the arbitration functions of the parameter input of the utility model conventional detector.
The circuit of RS485 communication isolation module is as shown in Figure 3; Described RS485 communication isolation module comprises RS485 change-over circuit, signal isolation circuit, DC/DC power isolation circuit; The first data I/O end of RS485 change-over circuit is through 485 COM1s of signal isolation circuit connection main control module, and the second data I/O end of RS485 change-over circuit is used to connect 485 bus type controller main frame or host computers; The power input of DC/DC power isolation circuit is used to connect described power supply VCC with common gases detector of parameter setting function, and the power output end of DC/DC power isolation circuit connects RS485 change-over circuit, signal isolation circuit power input respectively.
Wherein, said signal isolation circuit comprises the first optocoupler U7, the second optocoupler U5 and the 3rd optocoupler U3; Said RS485 change-over circuit comprises RS485 conversion chip U6 ((MAX13485)); Said DC/DC power isolation circuit comprises DC/DC isolating chip U4; The power input VIN of said DC/DC isolating chip U4 is used to connect described power supply VCC with common gases detector of parameter setting function, and the power output end VO of said DC/DC isolating chip U4 (output+5V direct supply) connects the power input of signal isolation circuit, RS485 conversion chip respectively;
The negative electrode of light emitting diode sends pin P3I/TXD through the data serial that connector JP5 connects the main control module among the said first optocoupler U7; Anode is used to connect power supply VCC; The emitter of triode connects the driver input end DI of RS485 conversion chip U6 among the first optocoupler U7; The power output end VO that connects DC/DC isolating chip U4 simultaneously, collector is through resistance R 19 ground connection; Driver input end DI, the base stage of the grounded emitter of the first triode Q1, collector connection RS485 conversion chip U6 connects the collector of triode among the first optocoupler U7;
The collector of triode connects the base stage of the second triode Q2 among the said second optocoupler U5; The grounded emitter of the second triode Q2 is used to connect the synchronous clock pulse pin P3 O/RXD of main control module; Emitter is used to connect power supply VCC; The anode of light emitting diode connects the power output end VO of DC/DC isolating chip U4 among the said second optocoupler U5, and negative electrode connects the receiver output pin RO of RS485 conversion chip U6;
The negative electrode of light emitting diode is used to connect the control signal output ends P1.1 of main control module among said the 3rd optocoupler U3; Anode connects the synchronous clock pulse pin P3 O/RXD0 of power supply VCC and main control module simultaneously, and the collector of triode connects the driver output enable end DE of RS485 conversion chip U6 among the 3rd optocoupler U3;
The A pin of said RS485 conversion chip U6, B pin connect the corresponding interface of controller main frame or host computer through connector JP6.
Send data flow:
When sending data; The main control module is put low level with the P1.1 pin of connector JP5, and the diode of the optocoupler U3 input end of P1.1 pin control this moment is in conducting state, has optical signal transmission to arrive the output terminal of optocoupler U3; The DE pin of 485 conversion of signals chip U6 is changed to high level; (the DE pin of 485 conversion of signals chip U6 is the input of control 485 conversion of signals chip U6, the pin of output state, and when the DE pin was high level, 485 conversion of signals chip U6 were in transmit status; When the DE pin was low level, 485 conversion of signals chip U6 were in accepting state.) at this moment; The main control module is delivered to the data of sending the P3.1/TXD pin of connector JP5; Each data of sending carry out being transferred to after photoelectricity is isolated the DI pin of 485 conversion of signals chip U6 through optocoupler U7; Data in connector JP6, send to the data transmission of sending output pin A, the B that Transistor-Transistor Logic level converts control 485 conversion of signals chip U6 behind the RS485 level on 485 buses through connector JP6 through 485 conversion of signals chip U6, accomplish the transmission work of data.
The receiving data stream journey:
When receiving data; The processor chips of main control module are put high level with the P1.1 pin of JP5; The diode of the optocoupler U3 input end of P1.1 control this moment is in not on-state, does not have optical signal transmission to arrive the output terminal that U3 manages, so the DE pin of 485 conversion of signals chip U6 (MAX13485) is changed to low level; At this moment, RS485 communication isolation module is in accepting state; When on 485 buses 485 level datas being arranged, 485 buses are passed through connector JP6 with A, the B pin of data transmission to 485 conversion of signals chip U6.Is the RO pin that Transistor-Transistor Logic level outputs to 485 conversion of signals chip U6 through 485 conversion of signals chip U6 with the RS485 conversion of signals between A, the B pin; Data on 485 buses just convert the high-low level data on the RO at this moment; RO pin control optocoupler U5; Signal after photoelectricity isolated is transferred to the P3.0/RXD pin of connector JP5, through the respective pin of connector JP5 with data transmission processor chips in the main control module, accomplishes the receiving course of data.
In addition; See Fig. 4; Be connected with a current-limiting resistance R2, R4, R6, R8, R10, R12, R14, R16, R18, R20, R22, R24 respectively on each pin one ~ 12 of the detection signal input end connector P1 of described main control module (being processor chips C8051F350), each data transmission pin 4 ~ 11 of the detection signal input end connector P1 of described main control module (being D0 ~ D7 pin) also respectively through one be used for overvoltage protection capacitor C 1, C3, C5, C7, C9, C11, C13, C15 ground connection; Be connected with a current-limiting resistance R3, R5, R7, R9, R11, R13, R15, R17, R19, R21, R23, R25 respectively on each pin one ~ 12 of the signal output part connector P2 of described transducing signal intelligent processing module, each data transmission pin one 2 ~ 5 of the signal output part connector P2 of described transducing signal intelligent processing module (be D0 ~ D7) also respectively through one be used for overvoltage protection capacitor C 2, C4, C6, C8, C10, C12, C14, C16 ground connection.In the process of carrying out hot plug, the resistance on said each pin can play the effect of limited contact moment generation pickup current; In the process of connector P1, the charged connection of P2, possibly produce big voltage of moment, utilize the charge-discharge principle of the electric capacity of parallel connection on said each pin; But the instantaneous variation of deboost; Play the effect of protecting both sides chips, circuit pin, so, can realize the function of charged hot plug.
Claims (7)
1. common gases detector with parameter setting function; Comprise main control module, 4 ~ 20mA simulating signal output module, transducing signal intelligent processing module; The transducing signal input end of transducing signal intelligent processing module is used to connect gas sensor module; The signal output part of transducing signal intelligent processing module connects the detection signal input end of main control module; 4 ~ 20mA analog signal output of main control module connects the signal input part of 4 ~ 20mA simulating signal output module, and the signal output part of 4 ~ 20mA simulating signal output module is used to connect host computer; It is characterized in that: said common gases detector with parameter setting function also comprises man-machine operational module, and the signal output part of man-machine operational module connects the man-machine signal input part of controlling of main control module.
2. the common gases detector with parameter setting function as claimed in claim 1 is characterized in that: described main control module adopts processor chips C8051F350.
3. according to claim 1 or claim 2 common gases detector with parameter setting function; It is characterized in that: described man-machine operational module is the code switch input circuit; Said code switch input circuit comprises four code switchs; Four code switchs comprise first, second, third, fourth code switch; The first end ground connection of first, second, third, fourth code switch, second end connect man-machine signal input part first, second, third, fourth pin of controlling of main control module respectively; Through drawing power supply in the connection of first, second, third, fourth pull-up resistor, second end of first, second, third, fourth code switch is also respectively through first, second, third, fourth capacity earth respectively for second end of first, second, third, fourth code switch.
4. the common gases detector with parameter setting function as claimed in claim 3; It is characterized in that: described common gases detector with parameter setting function also comprises RS485 communication isolation module; RS485 communication isolation module one end connects 485 COM1s of main control module, and the RS485 communication isolation module other end is used to connect 485 bus type controller main frame or host computers.
5. the common gases detector with parameter setting function as claimed in claim 4; It is characterized in that: described RS485 communication isolation module comprises RS485 change-over circuit, signal isolation circuit, DC/DC power isolation circuit; The first data I/O end of RS485 change-over circuit is through 485 COM1s of signal isolation circuit connection main control module, and the second data I/O end of RS485 change-over circuit connects 485 bus type controller main frame or host computers; The power input of DC/DC power isolation circuit is used to connect power supply, and the power output end of DC/DC power isolation circuit connects the power input of RS485 change-over circuit, signal isolation circuit respectively.
6. the common gases detector with parameter setting function as claimed in claim 5 is characterized in that:
Said signal isolation circuit comprises first optocoupler, second optocoupler and the 3rd optocoupler; Said RS485 change-over circuit comprises the RS485 conversion chip; Said DC/DC power isolation circuit comprises the DC/DC isolating chip, and the power input of said DC/DC isolating chip is used to connect power supply, and the power output end of said DC/DC isolating chip connects the power input of signal isolation circuit, RS485 conversion chip respectively;
The negative electrode of light emitting diode is used to connect the data serial transmission pin of main control module in said first optocoupler, and anode is used to connect power supply, and the emitter of triode connects the driver input end of RS485 conversion chip, grounded collector in first optocoupler; The collector of triode is used to connect the synchronous clock pulse pin of main control module in said second optocoupler; Emitter is used to connect the power input of DC/DC isolating chip; The anode of light emitting diode connects the power output end of DC/DC isolating chip in said second optocoupler, and negative electrode connects the receiver output pin of RS485 conversion chip; The negative electrode of light emitting diode is used to connect the control signal output ends of main control module in said the 3rd optocoupler; Anode is used to connect the power output end of DC/DC isolating chip, and the collector of triode connects the driver output enable end of RS485 conversion chip in the 3rd optocoupler;
485 bus links of said RS485 conversion chip connect the corresponding link of 485 bus type controller main frames or host computer.
7. the common gases detector with parameter setting function as claimed in claim 6; It is characterized in that: be connected with a current-limiting resistance on each pin of the detection signal input end connector of described main control module, each data transmission pin of the detection signal input end connector of described main control module also respectively through one be used for overvoltage protection capacity earth; Be connected with a current-limiting resistance on each pin of the signal output part connector of described transducing signal intelligent processing module, each data transmission pin of the signal output part connector of described transducing signal intelligent processing module also respectively through one be used for overvoltage protection capacity earth.
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| CN2011204337406U CN202330385U (en) | 2011-11-05 | 2011-11-05 | General gas prober with parameter setting function |
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| CN2011204337406U CN202330385U (en) | 2011-11-05 | 2011-11-05 | General gas prober with parameter setting function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808028A (en) * | 2015-04-30 | 2015-07-29 | 深圳市知用电子有限公司 | Oscilloscope intelligent active probe |
| CN110131458A (en) * | 2019-06-28 | 2019-08-16 | 郑州睿联智能科技有限公司 | A valve control circuit adaptable to various calibers |
| CN110187661A (en) * | 2019-06-27 | 2019-08-30 | 山东和信智能科技有限公司 | Serial data isolation protecting device is used safely in a kind of industry control |
| CN110813573A (en) * | 2019-11-27 | 2020-02-21 | 齐桂真 | Fog gun machine control system |
| CN113419986A (en) * | 2021-06-17 | 2021-09-21 | 深圳市车智杰车联网有限公司 | Method for improving anti-interference capability of bus |
-
2011
- 2011-11-05 CN CN2011204337406U patent/CN202330385U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808028A (en) * | 2015-04-30 | 2015-07-29 | 深圳市知用电子有限公司 | Oscilloscope intelligent active probe |
| CN104808028B (en) * | 2015-04-30 | 2017-12-19 | 深圳市知用电子有限公司 | A kind of oscillograph intellectuality active probe |
| CN110187661A (en) * | 2019-06-27 | 2019-08-30 | 山东和信智能科技有限公司 | Serial data isolation protecting device is used safely in a kind of industry control |
| CN110131458A (en) * | 2019-06-28 | 2019-08-16 | 郑州睿联智能科技有限公司 | A valve control circuit adaptable to various calibers |
| CN110813573A (en) * | 2019-11-27 | 2020-02-21 | 齐桂真 | Fog gun machine control system |
| CN113419986A (en) * | 2021-06-17 | 2021-09-21 | 深圳市车智杰车联网有限公司 | Method for improving anti-interference capability of bus |
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Address after: 5, No. 2, No. 450001, building No. 11, Chung Chun Road, Zhengzhou hi tech, Henan, Zhengzhou, D5 Patentee after: HENAN CHICHENG ELECTRIC CO., LTD. Address before: 450001, No. 11, Chun Yang Road, hi tech, Henan, Zhengzhou Patentee before: Henan Chicheng Electric Co.,Ltd. |
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