An ultra-long distance optical communication device for high voltage frequency converter

Abstract

The utility model provides a kind of super long distance optical communication device for high voltage frequency converter, it is related to communication technology field, comprising: signal sending unit is used to convert the short distance optical signal that the communication equipment of this end sends into long distance optical signal to another super long distance optical communication device transmission;Signal receiving unit is used to receive the long distance optical signal that another super long distance optical communication device sends and is converted into short distance optical signal transmission to the communication equipment of this end;Voltage regulating unit, the power supply end of connection signal sending unit is used to adjust the working voltage of signal sending unit.Achieved is the two-way communication between communication equipment directly, without passing through PLC etc. intermediate link, this direct communication mode reduces the delay of data conversion and transmission, improves transmission speed and accuracy, voltage regulating unit can adjust the working voltage of signal sending unit according to need, ensure that it still can maintain stable performance when long distance transmission.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to a kind of super-long distance optical communication device for high-voltage frequency converter. BACKGROUND

[0002] The master-slave control system architecture of high-voltage frequency converter covers two components of host frequency converter and slave frequency converter, and high-speed control data must be transmitted between them to meet the control requirements of high precision. At the same time, due to the large physical distance between the host and slave frequency converters, the transmission range of the communication system must also be wide enough.

[0003] The traditional communication solution relies on the communication module integrated with PLC (Programmable Logic Controller) to bridge the data transmission between the host and slave frequency converters. In this process, the data is first sent to the PLC for processing, and then forwarded to the opposite frequency converter through the communication module of the PLC to complete the data exchange. Although this solution performs well in scalability and compatibility, it requires each host and slave frequency converter to be equipped with a PLC and its auxiliary power supply, which undoubtedly increases the cost burden of the system. More importantly, since the data needs to go through multiple intermediate conversion links during transmission, it not only prolongs the transmission delay, but also increases the potential failure points, which poses a challenge to the long-term stable operation of the system, and therefore is not suitable for the master-slave control system with strict requirements on precision and distance.

[0004] As another option, optical fiber communication technology effectively alleviates the delay and cost problems in the PLC solution. However, optical fiber communication also faces challenges: the power of optical receivers and transmitters is limited, and the optical signal gradually attenuates with increasing distance during transmission. In previous applications, the transmission distance of optical fiber communication is usually limited to about 2 kilometers. In the face of higher power requirements for 5 kilometers or even longer distance transmission, the existing power supply voltage often cannot support the normal operation of power devices, thereby limiting the application of optical fiber communication technology in ultra-long distance transmission scenarios. SUMMARY

[0005] To solve the problems in the prior art, the utility model provides a kind of super-long distance optical communication device for high-voltage frequency converter, including two communication equipment in high-voltage frequency converter, each described communication equipment is equipped with one described super-long distance optical communication device, described super-long distance optical communication device includes:

[0006] Signal sending unit, the output end of the communication equipment of this end is connected, for converting the short-distance optical signal emitted by the communication equipment of this end into long-distance optical signal to send to another super-long distance optical communication device;

[0007] a signal receiving unit, connected to a receiving end of the communication device at the local end, for receiving a long-distance optical signal transmitted by another super-long distance optical communication device and converting the long-distance optical signal into a short-distance optical signal for transmission to the communication device at the local end;

[0008] a voltage regulating unit, an output end of the voltage regulating unit being connected to a power supply end of the signal transmitting unit, and an input end of the voltage regulating unit being connected to a power supply, for regulating the working voltage of the signal transmitting unit.

[0009] Preferably, the signal transmitting unit comprises:

[0010] a first optical receiver, a receiving end of the first optical receiver being connected to an output end of the communication device at the local end for receiving a short-distance optical signal, second, fourth, fifth and eighth pins of the first optical receiver being grounded, a third pin of the first optical receiver being connected to one end of a first capacitor and one end of a first resistor respectively, the other end of the first capacitor being grounded, and the other end of the first resistor being connected to the power supply;

[0011] a level converter, an input end of the level converter being connected to an output end of the first optical receiver, a ground pin of the level converter being grounded, a fifth pin of the level converter being connected to an output end of the voltage regulating unit and one end of a second capacitor, the other end of the second capacitor being grounded;

[0012] a first optical transmitter, an input end of the first optical transmitter being connected to an output end of the level converter, sixth and third pins of the first optical transmitter being connected to an output end of the voltage regulating unit and one end of a third capacitor, the other end of the third capacitor being grounded, and an output end of the first optical transmitter transmitting a long-distance optical signal.

[0013] Preferably, the receiving unit comprises:

[0014] a second optical receiver, an input end of the second optical receiver receiving a long-distance optical signal transmitted by another super-long distance optical communication device, eighth, fifth, fourth and third pins of the second optical receiver being grounded, a first pin of the optical signal receiver being connected to one end of a second resistor, a second pin of the optical signal receiver being connected to one end of a third resistor, the other end of the second resistor and the other end of the third resistor being connected to the power supply and one end of a fourth capacitor, the other end of the fourth capacitor being grounded;

[0015] a signal enhancer, an input end of the signal enhancer being connected to the second pin of the second optical receiver, first and eighth pins of the signal enhancer being connected to the power supply and one end of a fifth capacitor, the other end of the fifth capacitor being grounded;

[0016] A second optical transmitter, an input end of the second optical transmitter is connected to an output end of the signal enhancer, a third pin of the second optical transmitter is connected to the power supply, and an output end of the second optical transmitter is connected to an input end of the communication device at the local end to transmit a short-distance optical signal.

[0017] Preferably, the voltage regulating unit comprises:

[0018] A voltage converter, a first and third pin end of the voltage converter is connected to the power supply and one end of a sixth capacitor, one end of the sixth capacitor is grounded, a fifth pin of the voltage converter is connected to a power supply end of the signal transmitting unit and one end of a seventh capacitor, the other end of the seventh capacitor is grounded, and a ground pin of the voltage converter is grounded.

[0019] Preferably, the wavelength of the short-distance optical signal is 650 nm, and / or

[0020] The wavelength of the long-distance optical signal is 850 nm.

[0021] Preferably, the model of the voltage converter is TLV743P.

[0022] Preferably, the model of the first optical receiver is FR10MHIR; and / or

[0023] The model of the first optical transmitter is AFBR-1715TZ.

[0024] Preferably, the model of the second optical receiver is AFBR-2419TZ;

[0025] And / or the model of the second optical transmitter is FT10MHLR.

[0026] Preferably, the model of the signal enhancer is SN5545.

[0027] Preferably, the model of the level converter is SN74LV1T34.

[0028] The above technical solution has the following advantages or beneficial effects:

[0029] 1. The ultra-long distance optical communication device directly realizes the bidirectional communication between the communication devices, without the need to pass through the intermediate link such as PLC. This direct communication mode reduces the delay of data conversion and transmission, improves the transmission speed and accuracy. At the same time, since optical fiber is used as the transmission medium, it has strong anti-interference ability, stable and reliable transmission, which further guarantees the accuracy and stability of data transmission.

[0030] 2、The ultra-long distance optical communication device converts the short distance optical signal emitted by the local communication equipment into a long distance optical signal for transmission through the signal sending unit. This conversion enables the optical signal to maintain sufficient intensity over a longer distance, thereby achieving ultra-long distance communication. At the same time, the voltage regulation unit can adjust the operating voltage of the signal sending unit as needed to ensure that it maintains stable performance during long distance transmission. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The structure diagram of the remote optical communication device in the preferred embodiment of the present application is shown.

[0032] Figure 2 The communication system diagram of the high-voltage frequency converter in the embodiment of the present application is shown.

[0033] Figure 3 The circuit structure diagram of the signal sending unit in the embodiment of the present application is shown.

[0034] Figure 4 The circuit structure diagram of the voltage regulation unit in the embodiment of the present application is shown.

[0035] Figure 5 The circuit structure diagram of the receiving unit in the embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] The present application will be described in detail below in conjunction with the drawings and specific embodiments. The present application is not limited to this embodiment, and other embodiments can also fall within the scope of the present application as long as they comply with the main principles of the present application.

[0037] In the preferred embodiment of the present application, based on the above-mentioned problems existing in the prior art, an ultra-long distance optical communication device for a high-voltage frequency converter is provided, which includes two communication devices 10 in the high-voltage frequency converter, and each communication device 10 is provided with an ultra-long distance optical communication device 20, as shown in Figure 1 Each ultra-long distance optical communication device includes:

[0038] A signal sending unit 1 is connected to the output end of the local communication equipment 10A and is used to convert the short distance optical signal emitted by the local communication equipment 10A into a long distance optical signal for sending to another ultra-long distance optical communication device 20B.

[0039] A signal receiving unit 2 is connected to the receiving end of the local communication equipment 10A and is used to receive the long distance optical signal sent by another ultra-long distance optical communication device 20B and convert it into a short distance optical signal for transmission to the local communication equipment 10A.

[0040] The voltage regulating unit 3 is connected to the power supply end of the signal sending unit 1, and the input end of the voltage regulating unit 3 is connected to the power supply B, which is used to adjust the working voltage of the signal sending unit 1.

[0041] Specifically, traditional optical fiber communication is limited in transmission distance, mainly because the optical signal gradually attenuates with the increase of distance during transmission, and the power of optical receivers and transmitters is limited. The ultra-long optical communication device converts the short-distance optical signal emitted by the local communication equipment into a long-distance optical signal for transmission through the signal sending unit. This conversion enables the optical signal to maintain sufficient intensity over a longer distance, thereby achieving ultra-long communication. At the same time, the signal sending unit 1 needs different working voltages when transmitting signals at different distances, so the voltage regulating unit 3 is set to adjust the working voltage of the signal sending unit 1 as needed to ensure its stable performance during long-distance transmission.

[0042] The existing communication device adopts a PLC integrated communication module, which has problems such as large transmission delay and many potential fault points, affecting the long-term stable operation and high-precision control requirements of the system. The ultra-long optical communication device directly realizes the bidirectional communication between the communication equipment without going through intermediate links such as PLC. This direct communication method reduces the delay of data conversion and transmission, improves the transmission speed and precision. At the same time, since optical fiber is used as the transmission medium, it has strong anti-interference ability, stable and reliable transmission, which further guarantees the precision and stability of data transmission.

[0043] Specifically, as shown in Figure 2 In this embodiment, the two communication devices 10 of the high-voltage frequency converter are a master frequency converter 10A and a slave frequency converter 10B, and the master frequency converter 10A and the slave frequency converter 10B are respectively connected to one corresponding motor (10C, 10D). Figure 2As shown in the M1, M2), the host frequency converter 10A is provided with a first remote optical communication device 20A, and the slave frequency converter 10B is provided with a second remote optical communication device 20B. Each remote optical communication device includes a signal sending unit 1 and a signal receiving unit 2, when the host frequency converter 10A transmits data to the slave frequency converter 10B, a short distance optical signal is sent to the first remote optical communication device 20A through an optical fiber, the wavelength of the short distance optical signal is preferably 650nm, the signal sending unit of the first remote optical communication device 20A converts the short distance optical signal into a long distance optical signal, the wavelength of the long distance optical signal is preferably 850nm, and the signal sending unit 1 sends the long distance optical signal to the second remote optical communication device 20B; the signal receiving unit 2 of the second remote optical communication device 20B receives the long distance optical signal and converts it into a short distance optical signal, and then transmits the short distance optical signal to the slave frequency converter 10B through an optical fiber, so as to realize the remote optical fiber communication between the host frequency converter 10A and the slave frequency converter 10B, the transmission speed is faster and the transmission distance is farther, the communication frequency can reach 5MHZ, and compared with the PLC transmission device, the equipment cost can be effectively reduced.

[0044] In the preferred embodiment of the utility model, as shown in the figure, Figure 3 The signal sending unit 1 includes:

[0045] The first optical receiver RM1, the receiving end Rv of the first optical receiver RM1 is connected to the output end of the communication equipment of the local end to receive a short distance optical signal, the second, fourth, fifth and eighth pins of the first optical receiver RM1 are grounded, the third pin of the first optical receiver RM1 is connected to one end of the first capacitor C1 and the first resistor R1 respectively, the other end of the first capacitor C1 is grounded, and the other end of the first resistor R1 is connected to the power supply B (+ 5V);

[0046] The level converter IC1, the input end IN of the level converter IC1 is connected to the output end OUT of the first optical receiver RM1, the ground pin of the level converter IC1 is grounded, the fifth pin of the level converter IC1 is connected to the output end 3.3V of the voltage regulating unit 3 and one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded;

[0047] The first optical transmitter TM1, the input end of the first optical transmitter TM1 is connected to the output end OUT of the level converter IC1, the sixth and third pins of the first optical transmitter TM1 are connected to the output end 3.3V of the voltage regulating unit and one end of the third capacitor C3, the other end of the third capacitor C3 is grounded, and the output end Tr of the first optical transmitter TM1 sends a long distance optical signal.

[0048] Specifically, as shown in the figure, Figure 1 And Figure 3As shown, the first optical receiver RM1 in the embodiment adopts an optical receiver with model number FR10MHIR, and the input end RV of the first optical receiver RM1 is connected to the output end of the local communication device through a plastic optical fiber (POF). The plastic optical fiber has a large diameter, is convenient to couple, but has large optical attenuation and short transmission distance, and thus is used to receive the short-distance optical signal sent by the local communication device. The first optical transmitter TM1 adopts an optical transmitter with model number HFBR-1715TZ, and the first optical transmitter TM1 is connected to the second optical receiver RM2 of the ultra-long distance communication device 20 at the opposite end through a multimode quartz optical fiber. The transmission loss of the quartz optical fiber is low, the transmission distance is farther, and the quartz optical fiber is suitable for long-distance transmission occasions of more than 5km. The level converter IC1 adopts a device with model number SN74LV1T34 and is used for level signal conversion.

[0049] Specifically, the entire conversion process of the signal sending unit is as follows: the RM1 receives the short-distance optical signal with a wavelength of 650nm transmitted from the plastic optical fiber, converts the short-distance optical signal into a first electrical signal, and transmits the first electrical signal to the IC1. The first electrical signal is converted in level and sent to the TM1, which converts the first electrical signal into a long-distance optical signal with a wavelength of 850nm and transmits the long-distance optical signal through the multimode quartz optical fiber, so as to realize the conversion process from the short-distance optical signal to the electrical signal and then to the long-distance optical signal. Compared with the traditional PLC communication technology, the ultra-long distance optical communication device in the embodiment only converts and processes the optical electrical signal of communication, does not need to store or convert the communication data, reduces the intermediate link of the PLC communication, and reduces the system cost. Moreover, due to the use of the high-power optical signal transmitter, compared with the ordinary optical fiber communication mode, the communication distance is farther and can reach more than 5km.

[0050] In the preferred embodiment of the utility model, as shown in the figure, Figure 4 The voltage adjusting unit 3 comprises:

[0051] The voltage converter IC3 is connected to the power supply B (+5V) and one end of the sixth capacitor C6 through the first and third pins, one end of the sixth capacitor C6 is grounded, the fifth pin of the voltage converter IC3 is connected to the power supply end of the signal sending unit 1 and one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is grounded, and the ground pin GND of the voltage converter is grounded.

[0052] Specifically, in order to meet the demand of ultra-long distance signal transmission of more than 5km, the level converter IC1 and the first optical transmitter TM1 in the signal sending unit 1 need to use high-power components. The previous design of a single power supply cannot meet the variable power demand, so the voltage adjusting unit 3 is arranged to adjust the working voltage provided by the level converter IC1 and the first optical transmitter TM1 in the signal sending unit 1, so as to meet the working demand.

[0053] In the preferred embodiment of the utility model, as shown in the figure,Figure 5 As shown in the figure, the receiving unit 2 comprises:

[0054] A second optical receiver RM2, an input end of the second optical receiver RM2 receives a long-distance optical signal transmitted by the other ultra-long distance optical communication device 20, eighth, fifth, fourth and third pins of the second optical receiver RM2 are grounded, a first pin of the second optical receiver RM2 is connected to one end of a second resistor R2, a second pin of the second optical receiver RM2 is connected to one end of a third resistor R3, the other end of the second resistor R2 and the other end of the third resistor R3 are connected to a power supply B (+5V) and one end of a fourth capacitor C4, the other end of the fourth capacitor C4 is grounded;

[0055] A signal enhancer IC2, an input end of the signal enhancer IC2 is connected to the second pin of the second optical receiver RM2, first and eighth pins of the signal enhancer IC2 are connected to the power supply B (+5V) and one end of a fifth capacitor C5, the other end of the fifth capacitor C5 is grounded;

[0056] A second optical transmitter TM2, an input end of the second optical transmitter TM2 is connected to an output end of the signal enhancer IC2, a third pin of the second optical transmitter TM2 is connected to the power supply B (+5V), and an output end of the second optical transmitter TM2 is connected to an input end of the communication device 10 at the local end to transmit a short-distance optical signal.

[0057] Specifically, in the embodiment, the second optical receiver RM2 is an optical receiver with a model number of AFBR-2419TZ, the second optical receiver RM2 is connected to the first optical transmitter TM1 of the other ultra-long distance optical communication device 20 at the opposite end through a multimode quartz optical fiber, and is used to receive a long-distance optical signal transmitted by the opposite end; the second optical transmitter TM2 is an optical transmitter with a model number of FT10MHLR, and is connected to the communication device at the local end through a plastic optical fiber; and the second signal enhancer IC2 is a driver with a model number of SN5545, and is used to drive and enhance a second electrical signal.

[0058] The whole conversion process of the receiving unit is as follows: the RM2 receives a long-distance optical signal with a wavelength of 850nm transmitted from the multimode quartz optical fiber, converts the long-distance optical signal into a second electrical signal, transmits the second electrical signal to the IC2, the second electrical signal is driven and enhanced, and is transmitted to the TM2, the TM2 converts the second electrical signal into a short-distance optical signal with a wavelength of 650nm, and transmits the short-distance optical signal to the communication device at the local end through the plastic optical fiber, so that the conversion process from the long-distance optical signal to the electrical signal and then to the short-distance optical signal is realized. Compared with the traditional PLC communication technology, the ultra-long distance optical communication device in the embodiment only converts and processes the optical and electrical signals of the communication, does not need to store or convert the communication data, reduces the intermediate links of the PLC communication, and reduces the system cost; and because a more sensitive optical receiver is used, the communication distance is much longer than that of the ordinary optical fiber communication, and can reach more than 5km.

[0059] In the preferred embodiment of the present application, the wavelength of the short-distance optical signal is 650nm, and / or

[0060] the wavelength of the long-distance optical signal is 850nm.

[0061] In the preferred embodiment of the present application, the model of the voltage converter is TLV743P.

[0062] In the preferred embodiment of the present application, the model of the first optical receiver is FR10MHIR; and / or

[0063] the model of the first optical transmitter is AFBR-1715TZ.

[0064] In the preferred embodiment of the present application, the model of the second optical receiver is AFBR-2419TZ;

[0065] and / or the model of the second optical transmitter is FT10MHLR.

[0066] In the preferred embodiment of the present application, the model of the signal enhancer is SN5545.

[0067] In the preferred embodiment of the present application, the model of the level converter is SN74LV1T34.

[0068] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change made according to the present application and drawings should be included in the protection scope of the present application.

Claims

1. An ultra-long-range optical communication device for a high-voltage frequency converter, characterized in that, The high-voltage frequency converter comprises two communication devices, each of which is provided with an ultra-long distance optical communication device, and the ultra-long distance optical communication device comprises: a signal sending unit connected to the output end of the communication device at the local end, used for converting the short-distance optical signal sent by the communication device at the local end into a long-distance optical signal and sending the long-distance optical signal to another ultra-long distance optical communication device; a signal receiving unit connected to the receiving end of the communication device at the local end, used for receiving the long-distance optical signal sent by another ultra-long distance optical communication device and converting the long-distance optical signal into a short-distance optical signal and transmitting the short-distance optical signal to the communication device at the local end; a voltage regulating unit, wherein the output end of the voltage regulating unit is connected to the power supply end of the signal sending unit, and the input end of the voltage regulating unit is connected to a power supply, used for regulating the working voltage of the signal sending unit.

2. The ultra-long-range optical communication device of claim 1, wherein, The signal sending unit comprises: a first optical receiver, wherein the receiving end of the first optical receiver is connected to the output end of the communication device at the local end to receive a short-distance optical signal, the second, fourth, fifth and eighth pins of the first optical receiver are grounded, the third pin of the first optical receiver is connected to one end of a first capacitor and a first resistor respectively, the other end of the first capacitor is grounded, and the other end of the first resistor is connected to the power supply; a level converter, wherein the input end of the level converter is connected to the output end of the first optical receiver, the ground pin of the level converter is grounded, the fifth pin of the level converter is connected to the output end of the voltage regulating unit and one end of a second capacitor, and the other end of the second capacitor is grounded; a first optical transmitter, wherein the input end of the first optical transmitter is connected to the output end of the level converter, the sixth and third pins of the first optical transmitter are connected to the output end of the voltage regulating unit and one end of a third capacitor, the other end of the third capacitor is grounded, and the output end of the first optical transmitter sends a long-distance optical signal.

3. The ultra-long-range optical communication device of claim 1, wherein, The receiving unit comprises: a second optical receiver, wherein the input end of the second optical receiver receives a long-distance optical signal sent by another ultra-long distance optical communication device, the eighth, fifth, fourth and third pins of the second optical receiver are grounded, the first pin of the second optical receiver is connected to one end of a second resistor, the second pin of the second optical receiver is connected to one end of a third resistor, the other end of the second resistor and the other end of the third resistor are connected to the power supply and one end of a fourth capacitor, and the other end of the fourth capacitor is grounded; a signal enhancer, wherein the input end of the signal enhancer is connected to the second pin of the second optical receiver, the first and eighth pins of the signal enhancer are connected to the power supply and one end of a fifth capacitor, and the other end of the fifth capacitor is grounded; a second optical transmitter, wherein the input end of the second optical transmitter is connected to the output end of the signal enhancer, the third pin of the second optical transmitter is connected to the power supply, and the output end of the second optical transmitter is connected to the input end of the communication device at the local end to transmit a short-distance optical signal.

4. The ultra-long-range optical communication device of claim 1, wherein, The voltage regulating unit comprises: A voltage converter, a first and a third pin of the voltage converter are connected to the power supply and one end of a sixth capacitor, one end of the sixth capacitor is grounded, a fifth pin of the voltage converter is connected to a power supply end of the signal sending unit and one end of a seventh capacitor, the other end of the seventh capacitor is grounded, a ground pin of the voltage converter is grounded.

5. The ultra-long-range optical communication device of claim 1, wherein, The wavelength of the short-distance optical signal is 650 nm, and / or the wavelength of the long-distance optical signal is 850 nm.

6. The ultra-long-range optical communication device of claim 4, wherein, The model of the voltage converter is TLV743P.

7. The ultra long-range optical communication device of claim 2, wherein, The model of the first optical receiver is FR10MHIR; and / or The model of the first optical transmitter is AFBR-1715TZ.

8. The ultra-long-range optical communication device of claim 3, wherein, The model of the second optical receiver is AFBR-2419TZ; And / or the model of the second optical transmitter is FT10MHLR.

9. The ultra long-range optical communication device of claim 3, wherein, The model of the signal enhancer is SN5545.

10. The ultra long-range optical communication device of claim 2, wherein, The model of the level converter is SN74LV1T34.

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