CN204528962U - A kind of elevator serial Peripheral Interface signal pickup assembly - Google Patents
A kind of elevator serial Peripheral Interface signal pickup assembly Download PDFInfo
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- CN204528962U CN204528962U CN201520200982.9U CN201520200982U CN204528962U CN 204528962 U CN204528962 U CN 204528962U CN 201520200982 U CN201520200982 U CN 201520200982U CN 204528962 U CN204528962 U CN 204528962U
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Abstract
The utility model provides a kind of elevator serial Peripheral Interface signal pickup assembly, comprise signal gathering unit, data processing unit, data retransmission communication unit and power subsystem unit, wherein signal gathering unit and data retransmission communication unit are connected with data processing unit respectively, power subsystem unit respectively and signal gathering unit, data processing unit and data retransmission communication unit are connected, signal gathering unit comprises SPI interface circuit, RC circuit, shaping circuit and voltage clamp protective circuit, SPI interface circuit is connected with RC circuit and described voltage clamp protective circuit respectively, shaping circuit is connected with described RC circuit.The utility model can realize the remote capture communication function of elevator SPI signal, not only improve acquisition of signal stability, the receives data packets success ratio of elevator acquisition monitoring device significantly, but also facilitate in-site installation, simplify field installation process, enhance product work stability, improve the security monitoring of elevator.
Description
Technical field
The utility model is about technical field of elevator equipment, especially about a kind of elevator SPI (Serial PeripheralInterface, Serial Peripheral Interface (SPI)) signal pickup assembly.
Background technology
Along with the raising of socioeconomic fast development and people's lives water product, the application of elevator also gets more and more, large to some social public arenas as city underground, station etc., little to residential quarter, commercial square etc.Thus the use of elevator is increased, and it is not only related to the personal safety of the people but also has influence on a social public transport safety.With the frequent use of elevator, its safe operation situation also more and more obtains the extensive concern of society.For this reason, the security monitoring of elevator is more and more applied to elevator use occasion.
Elevator brand is a lot of in the market, each brand is also greatly different to the monitor mode of elevator, the elevator of such as some particular brand is preset with special run signal monitoring acquisition interface, and the interface communications protocol of intelligent producer establishing criteria carries out corresponding elevator safety monitoring.
SPI is a kind of synchronous serial Peripheral Interface, establishing criteria SPI communication protocol can realize at a high speed, full duplex peripheral communication; Support two kinds of mode of operations: holotype and from pattern.Employing SPI conveniently can realize the data communication between MCU (MicroControl Unit, micro-control unit) and peripheral chip IC.The great majority that current elevator market adopts spi bus to carry out communicating are applied in chip-scale communication, substantially not easily and the communication be rarely used between distant distinct device system.In addition, minority brand elevator is only had to preset SPI communication interface at present, the brand elevator of SPI hardware signal interface is adopted for these, current most of elevator monitoring producer is all that the SPI communications protocol of establishing criteria and corresponding hardware interface design substantially, is generally to adopt isolation optocoupler to be directly connected as after peripheral hardware PORT COM or signal pull-up.
Such as, existing SPI signal pickup assembly, its hardware interface circuit generally adopts three signal wire (SW): SDI (Serial Digit Input, serial digital inputs), SCLK (Serial Clock, serial clock), SCS (SerialControl Signal, serial is from devices enable signal); Every signal line is with resistance pull-up and signal carries out isolation communication by isolation optocoupler.Demand fulfillment certain working current (generally at several milliampere to tens milliampere) during owing to isolating the LED side work of optocoupler and its work time life period corresponding problem; When connection is long, the internal resistance of itself increases, and weakens working current on the one hand, adds parasitic inductance on the other hand, thus indirectly reduces anti-interference resistance.When high speed SCLK signal positive rise, the long meeting of SCLK signal wire (SW) causes positive rise to be stagnated or klirr, thus can produce sequential entanglement or admission control.
Visible, the SPI acquisition of signal communicating circuit in existing elevator is difficult to the acquisition of signal communication carrying out growing distance, and seldom can play shaping feature for signal waveform.
Utility model content
The utility model provides a kind of elevator serial Peripheral Interface signal pickup assembly, to realize the remote capture communication of SPI signal in elevator operation, and improves acquisition of signal stability, the receives data packets success ratio of elevator acquisition monitoring device.
To achieve these goals, the utility model provides a kind of elevator serial Peripheral Interface signal pickup assembly, comprise signal gathering unit, data processing unit, data retransmission communication unit and power subsystem unit, wherein signal gathering unit and data retransmission communication unit are connected with data processing unit respectively, power subsystem unit respectively and signal gathering unit, data processing unit and data retransmission communication unit are connected, signal gathering unit comprises SPI interface circuit, RC circuit, shaping circuit and voltage clamp protective circuit, SPI interface circuit is connected with RC circuit and voltage clamp protective circuit respectively, shaping circuit is connected with RC circuit.
Preferably, the voltage clamp protective circuit in the utility model adopts transient voltage suppression diode, is arranged on the SPI signal wire (SW) in SPI interface circuit.
Preferably, in the utility model, SPI signal wire (SW) is also provided with voltage pull-up resistor and SPI signal is pulled to+24V.
Preferably, the shaping circuit in the utility model adopts schmidt trigger phase inverter.
Preferably, the data retransmission communication unit in the utility model comprises RS232 communication module and RS485 communication module.
Preferably, the power subsystem unit in the utility model is DC/DC power circuit.
The beneficial effect of the utility model embodiment is, the remote capture communication function of elevator SPI signal can be realized, not only improve acquisition of signal stability, the receives data packets success ratio of elevator acquisition monitoring device significantly, but also facilitate in-site installation, simplify field installation process, enhance product work stability, improve the security monitoring of elevator.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of elevator serial Peripheral Interface signal pickup assembly that Fig. 1 provides for the utility model embodiment;
The circuit diagram of a kind of signal gathering unit that Fig. 2 provides for utility model embodiment;
The structural representation of a kind of data forwarding unit that Fig. 3 provides for the utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The structural representation of a kind of elevator serial Peripheral Interface signal pickup assembly that Fig. 1 provides for the utility model embodiment, this elevator SPI signal pickup assembly comprises signal gathering unit 110, data processing unit 120, data forwarding unit 130 and power subsystem unit 140, wherein, signal gathering unit 110 is for gathering car movement data, filtering is carried out to these data, data processing unit 120 is exported to after shaping, Data Analysis is carried out by data processing unit 120, when there being monitor supervision platform to read elevator data request, data processing unit 120 can respond it and asks and return elevator operation information data packet to long-range monitor supervision platform, power subsystem unit 140 provides power supply and power source conversion function for elevator SPI signal pickup assembly of the present utility model.
As seen from Figure 1; in the utility model; signal gathering unit 110 includes SPI interface circuit 111, RC circuit 112, shaping circuit 113 and voltage clamp protective circuit 114; wherein SPI interface circuit 111 is connected with RC circuit 112 and voltage clamp protective circuit 114 respectively, and shaping circuit 113 is then connected with RC circuit 112.
When car movement data frame exports, it is transferred to RC circuit 112 by SPI interface circuit 111, because RC circuit 112 can play signal filtering function, therefore the interfering signal in car movement data frame can be carried out filtering.And then by RC circuit 112, the SPI signal that elevator runs being sent to shaping circuit 113, SPI signal waveform can be carried out shaping by this shaping circuit 113, but also can strengthen the antijamming capability of SPI signal.As an embodiment of the present utility model, this shaping circuit 113 can be a schmidt trigger phase inverter, because the logic low and high level of schmidt trigger phase inverter limits a thresholding, when there being interfering signal, the effective logic level on SPI every root signal wire (SW) also can not trigger inverter; So make shaping circuit 113 can have good signal Anti-Jamming and signal enhancing function.
Be illustrated in figure 2 the circuit diagram of a kind of signal gathering unit 110 that the utility model embodiment provides; as seen from Figure 2; D1, D2 and D3 are the voltage clamp protection device on SPI signal wire (SW); as an embodiment of the present utility model, this place can adopt TVS transient voltage suppression diode SMBJ33CA model.SPI signal is pulled to+24V by resistance R2, R5 and R8, and it not only plays signal strong pull-up effect, and enhances transmittability and the anti-interference resistance of signal, thus can extend the communications distance of SPI signal further.R1, R3 and C1 (R4, R6 and C2; R7, R9 and C3) form RC filter circuit, it not only can noise signal on filtering SPI signal wire (SW) but also can play burning voltage effect, in addition, mainly still play a point compression functions, by logic-level voltages effective in+24V voltage to circuit.As seen from Figure 2, SCS, SCLK and sdi signal are after RC filter circuit, be integrated on shaping device U0, in the present embodiment, that shaping circuit adopts is schmidt trigger reverser 74VHC14, it mainly plays and SPI signal is carried out reversion and signal shaping function, and can strengthen signal power-handling capability.SPI signal, after shaping device U0, respectively through resistance R10, R11 and R12, and is sent to data processing unit 120.
As an embodiment of the present utility model, the data processing of data processing unit 120 primary responsibility SPI signal and the data communication of remote monitor and control, it can adopt kernel processor chip PIC16F1946, this sheet is the PIC16 series monolithic of MICROCHIP, low price, aboundresources, stable performance.
Be illustrated in figure 3 the structural representation of a kind of data forwarding unit that the utility model embodiment provides, the telecommunication of data forwarding unit primary responsibility elevator operation data, realize the real-time monitoring and control of elevator operation, this data forwarding unit 130 includes RS232 communication module 131 and RS485 communication module 132, therefore two kinds of standard communications mode can be supported, in the present embodiment, RS232 communication module 131 can adopt MAX232 chip, and RS485 communication module 132 can adopt MAX485 chip.Visible, the SPI signal pickup assembly signalling methods compatibility of the present embodiment is good, can meet remote elevator monitor-interface standard and the protocol requirement of different intelligent producer.
What power subsystem unit 140 adopted in the present embodiment is DC/DC power circuit, and circuit primary responsibility voltage dress in this part changes function, and the 24V voltage step-down that elevator is inputted also is stabilized in 5V voltage.This circuit working principle is mainly BUCK reduction voltage circuit, and its input side supports the vdc input of 9V to 35V scope, output voltage stabilization, technology maturation, working stability.
Visible, the utility model embodiment can realize the remote capture communication function of elevator SPI signal, it not only improves acquisition of signal stability, the receives data packets success ratio of elevator acquisition monitoring device significantly, but also facilitate in-site installation, simplify field installation process, enhance product work stability, improve the security monitoring of elevator.
Apply specific embodiment in the utility model to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (6)
1. an elevator serial Peripheral Interface signal pickup assembly, it is characterized in that: comprise signal gathering unit, data processing unit, data retransmission communication unit and power subsystem unit, wherein said signal gathering unit and described data retransmission communication unit are connected with described data processing unit respectively, described power subsystem unit respectively with described signal gathering unit, described data processing unit and described data retransmission communication unit are connected, described signal gathering unit comprises SPI interface circuit, RC circuit, shaping circuit and voltage clamp protective circuit, described SPI interface circuit is connected with described RC circuit and described voltage clamp protective circuit respectively, described shaping circuit is connected with described RC circuit.
2. elevator serial Peripheral Interface signal pickup assembly as claimed in claim 1, is characterized in that: described voltage clamp protective circuit adopts transient voltage suppression diode, is arranged on the SPI signal wire (SW) in described SPI interface circuit.
3. elevator serial Peripheral Interface signal pickup assembly as claimed in claim 2, is characterized in that: described SPI signal wire (SW) is also provided with voltage pull-up resistor SPI signal is pulled to+24V.
4. elevator serial Peripheral Interface signal pickup assembly as claimed in claim 1 or 2, is characterized in that: described shaping circuit adopts schmidt trigger phase inverter.
5. elevator serial Peripheral Interface signal pickup assembly as claimed in claim 1, is characterized in that: described data retransmission communication unit comprises RS232 communication module and RS485 communication module.
6. elevator serial Peripheral Interface signal pickup assembly as claimed in claim 1, is characterized in that: described power subsystem unit is DC/DC power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520200982.9U CN204528962U (en) | 2015-04-01 | 2015-04-01 | A kind of elevator serial Peripheral Interface signal pickup assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520200982.9U CN204528962U (en) | 2015-04-01 | 2015-04-01 | A kind of elevator serial Peripheral Interface signal pickup assembly |
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| CN204528962U true CN204528962U (en) | 2015-08-05 |
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| CN201520200982.9U Expired - Fee Related CN204528962U (en) | 2015-04-01 | 2015-04-01 | A kind of elevator serial Peripheral Interface signal pickup assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105677607A (en) * | 2015-12-30 | 2016-06-15 | 华自科技股份有限公司 | SPI bus topological structure |
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2015
- 2015-04-01 CN CN201520200982.9U patent/CN204528962U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105677607A (en) * | 2015-12-30 | 2016-06-15 | 华自科技股份有限公司 | SPI bus topological structure |
| CN105677607B (en) * | 2015-12-30 | 2019-08-27 | 华自科技股份有限公司 | Spi bus topological structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20170401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |