CN218550012U - Video streaming transmission system for transformer substation monitoring - Google Patents
Video streaming transmission system for transformer substation monitoring Download PDFInfo
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- CN218550012U CN218550012U CN202223104872.1U CN202223104872U CN218550012U CN 218550012 U CN218550012 U CN 218550012U CN 202223104872 U CN202223104872 U CN 202223104872U CN 218550012 U CN218550012 U CN 218550012U
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Abstract
The utility model provides a video stream transmission system for transformer substation's control, realize video signal's transmission through 5G communication module, avoid 5G communication frequency channel's signal to the clock signal production interference of the external memory of video processing chip, and then produce interference to video signal, add filter circuit between the clock of the external memory interface of video processing chip and the clock of external memory, the signal of filtering 5G communication frequency channel, guarantee that video processing chip and 5G module homoenergetic are normal to do, under the condition of mutual noninterference, improve the video image quality of transformer substation and transmission rate.
Description
Technical Field
The utility model relates to a transformer substation control technical field, in particular to a video streaming transmission system for transformer substation's control.
Background
The transformer substation is used as a physical connection point for electric energy transmission and redistribution and is responsible for regional power supply, online video monitoring of the transformer substation is required to be carried out for long-term safe and stable operation of the transformer substation, which has important significance for reducing accidents and improving the operation reliability of equipment, and the transformer substation has the characteristics of complex working environment and high reliability requirement, so that higher requirement is put forward on a video monitoring system.
The video stream transmission modes of the video monitoring system mainly include 4 types, namely coaxial transmission, optical fiber transmission, network transmission and twisted pair transmission, and the transmission modes respectively have the following defects: (1) coaxial transmission: the transmission distance is short, the attenuation of high-frequency components of more than 300 meters is large, and the image quality cannot be ensured. (2) optical fiber transmission: for monitoring signal transmission within several kilometers, monitoring with low image quality requirements is not economical. (3) network transmission: the number of paths and frames per second for transmitting the monitoring images is limited due to the influence of the network bandwidth and the transmission speed. (4) twisted pair transmission: the method can only solve the problem of monitoring image transmission within 1Km, and the twisted pair is fragile in texture, poor in ageing resistance and not suitable for field transmission.
SUMMERY OF THE UTILITY MODEL
The utility model provides a video stream transmission system for transformer substation's control aims at improving transformer substation's surveillance video's image quality and transmission rate through 5G communication.
The utility model relates to a video stream transmission system for transformer substation's control, include:
the image sensor is used for acquiring an analog video signal of the transformer substation;
the video processing chip is connected with the image sensor and is used for processing the analog video signal collected by the image sensor and converting the analog video signal into a digital video signal;
the external memory is connected with the video processing chip and is used for storing the digital video signal;
the filter circuit is connected with a clock of an external memory interface of the video processing chip at one end and is connected with the clock of the external memory at the other end, and is used for filtering signals of a 5G communication frequency band so as to avoid generating interference on clock signals of the external memory;
and the 5G communication module is connected with the video processing chip and is used for wirelessly transmitting the digital video signal.
In one embodiment, the model of the video processing chip is Hi3516CV300.
In one embodiment, the external memory is DDR3 or DDR4.
In one embodiment, the filter circuit is a low pass filter circuit.
In one embodiment, the low-pass filter circuit includes a resistor R1, a resistor R2, a capacitor C1, a capacitor C2 and an operational amplifier U, one end of the resistor R1 is connected to a clock of an external memory interface of the video processing chip, the other end of the resistor R2 is connected to one end of the capacitor C1, the other end of the capacitor C1 is connected to an output end of the operational amplifier U, the other end of the resistor R2 is connected to a non-inverting input end of the operational amplifier U and one end of the capacitor C2, the other end of the capacitor C2 is grounded, an inverting input end of the operational amplifier U is connected to an output end of the operational amplifier U, and an output end of the operational amplifier U is connected to a clock of the external memory;
wherein, the resistance value of R1 is 1.6 omega, the resistance value of R2 is 3.9 omega, the capacity value of C1 is 120pF, and the capacity value of C2 is 5pF.
In one embodiment, the model of the 5G communication module is MH5000.
In one embodiment, the video processing chip with the model number of Hi3516CV300 comprises a USB interface, a memory card interface, a simplified media independent interface, a synchronous serial interface, a wireless network interface and a wired network interface, wherein each interface can be used for connecting external devices with different interface types, and the external devices comprise the image sensor and the 5G communication module.
In one embodiment, the system further comprises a cloud platform for receiving the digital video signal sent by the 5G communication module.
In one embodiment, the downstream transmission rate of the video streaming transmission system is up to 2Gbps, and the upstream transmission rate is up to 230Mbps.
In one embodiment, the video streaming system has the operation speed of 14400DMPIS.
The utility model is used for video stream transmission system of transformer substation's control, realize video signal's transmission through 5G communication module, avoid 5G communication frequency channel's signal to the clock signal of the external memory of video processing chip to produce the interference, and then produce the interference to video signal, add filter circuit between the clock of the external memory interface of video processing chip and the clock of external memory, the signal of filtering 5G communication frequency channel, in the guarantee video processing chip and the normal doing of 5G module homoenergetic, under the condition of mutual noninterference, improve the video image quality of transformer substation and transmission rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.
Fig. 1 is a circuit diagram of a video streaming system for substation monitoring according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a video streaming system for substation monitoring according to another embodiment of the present invention;
fig. 3 is a circuit diagram of a filter circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the present invention, the directional terms, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", refer to the orientation of the drawings, and the directional terms are used for illustration and understanding, but not for limiting the present invention.
The terms "first," "second," and the like in the terms of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or any order limitation.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, the utility model relates to a video stream transmission system for transformer substation's control, include:
the image sensor 10 is used for acquiring analog video signals of the transformer substation;
the video processing chip 20 is connected to the image sensor 10, and is configured to process the analog video signal collected by the image sensor 10 and convert the analog video signal into a digital video signal;
an external memory 30 connected to the video processing chip 20 for storing the digital video signal;
a filter circuit 40, one end of which is connected to the clock of the external memory interface DDR of the video processing chip 20, and the other end of which is connected to the clock of the external memory 30, for filtering signals in a 5G communication frequency band, so as to avoid interference to the clock signal of the external memory 30;
and the 5G communication module 50 is connected to the video processing chip 20 and is configured to wirelessly transmit the digital video signal.
The 5G communication can realize signal transmission with high bandwidth and high rate, and the video streaming transmission system for monitoring the substation of this embodiment can improve the image quality and the transmission rate of the monitoring video of the substation by transmitting the video signal through the 5G communication module 50. Because the 5G communication module 50 has strong radio frequency power, it may interfere with the clock signal of the external memory 30 of the video processing chip, and further interfere with the video signal, and the filter circuit 40 is added between the clock of the external memory interface DDR of the video processing chip 20 and the clock of the external memory 30, so as to filter the signal of the 5G communication frequency band, and ensure that the video processing chip 20 and the 5G communication module 50 can both work normally without mutual interference.
Specifically, referring to fig. 2, in one embodiment, the video processing chip 20 is a video processing chip with a model number of Hi3516CV300, and the Hi3516CV300 is a new generation of industry-specific camera system-on-chip.
In one embodiment, the external memory 30 is of the DDR3 or DDR4 type. DDR3 or DDR4 is 32bit memory, and the external memory of the Hi3516CV300 video processing chip can be compatible with the memory of the type.
In one embodiment, the model number of the 5G communication module is MH5000. The 5G communication module of MH5000 can be compatible with various wireless communication modes of 2G, 3G, 4G and 5G.
At present, the differential clock frequencies of the internal memory DDR3 are 533MHz, 666.5MHz, 800MHz, 933MHz, 1066.5MHz, and the differential clock frequencies of the memory DDR4 are 1066.5MHz, 1200MHz, 1466.5MHz, 1600MHz. China has already allocated frequency bands in FR1 in 5G, wherein China moves: 160MHz of 2515MHz-2675MHz, the frequency range number is n41, and 100MHz of 4800MHz-4900MHz, the frequency range number is n79; china telecom: 3400MHz-3500MHz is 100MHz totally, and the frequency band number is n78; china Unicom: 100MHz is the sum of 3500MHz-3600MHz, and the frequency band number is n78.
It can be seen that the highest differential clock frequency of the memory DDR3 and the memory DDR4 is 1600MHz, which is less than the frequency band of the 5G communication signal, and the frequency multiplication signal is within the 5G frequency band, because the MH50005G communication module adopted in this embodiment has strong radio frequency power, the filter circuit 40, specifically, the low pass filter circuit, is added on the DDR differential clock transmission link to filter out the noise waves in the frequency band higher than 1600MHz on the DDR differential clock transmission link, and it is ensured that the video processing chip and the 5G communication module can both work normally and do not interfere with each other.
Referring to fig. 3, in one embodiment, the low-pass filter circuit includes a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, and an operational amplifier U, one end of the resistor R1 is connected to a clock of an external memory interface of the video processing chip, the other end of the resistor R1 is respectively connected to one end of the resistor R2 and one end of the capacitor C1, the other end of the capacitor C1 is connected to an output end of the operational amplifier U, the other end of the resistor R2 is connected to a non-inverting input end of the operational amplifier U and one end of the capacitor C2, the other end of the capacitor C2 is grounded, an inverting input end of the operational amplifier U is connected to an output end of the operational amplifier U, and an output end of the operational amplifier U is connected to a clock of the external memory.
The parameter value calculation process of the filter is as follows:
1. the capacitance value of the capacitor CI is C 1 The capacitance value of the capacitor C2 is C 2 ，C 1 And C 2 Geometric mean formula:
where Fn is the cut-off frequency of the filter in Hz: (ω/2 π), the capacitance unit calculated by the equation is Farad. Xi =1/2Q, when xi is less than 1, C 1 May be chosen to be greater than the geometric mean, C 2 A smaller value is selected. Conversely, when xi is larger than 1, C 1 Selecting a smaller value, C 2 Larger than the geometric mean may be selected.
2. Calculate C 1 The specific numerical value can be selected according to a common capacitance value table and is within 3 times of the calculated value;
3. according to the selected C 1 Numerical value, calculate C 2 <ξ 2 C 1 The specific value of the upper capacitance value can be selected according to a common capacitance value table.
4. Calculating the resistance values of the resistors R1 and R2 according to the formulas (2) and (3), wherein the resistance value of the resistor R1 is R 1 The resistance value of the resistor R2 is R 2 ：
In addition, the air conditioner is provided with a fan,
combine the practical demand of the embodiment of the utility model, set up cutoff frequency Fn =1600MHz, quality factor Q =2.
Is obtained by xi =1/2Q, and xi =0.25;
C 1 = C/xi =0.04nF, and 120pF is selected;
C 2 <ξ 2 C 1 =3.125pF, and 5pF is selected;
calculating R according to equation (2) 1 R 2 ＝6.06；
Calculating R according to equation (4) 1 /R 2 ＝3.69；
To obtain R 1 =1.6, select R 1 ＝1.6Ω；R 2 =3.79, select R 2 ＝3.9Ω。
Final selection of R 1 ＝1.6Ω，R 2 ＝3.9Ω，C 1 ＝120pF，C 2 ＝5pF。
Signals of the 5G communication frequency band can be effectively filtered through setting of the parameters, effective signals of the memory DDR3 and the memory DDR4 are reserved, interference of the signals of the 5G communication frequency band on clock signals of the memory DDR3 and the memory DDR4 is avoided, and then the quality of video signals is prevented from being influenced. The setting of the parameter is a preferred setting, and is not taken as a limitation on the embodiment of the application.
Specifically, referring to fig. 2, the video processing chip 20 with the model number Hi3516CV300 includes a USB interface, a memory card interface (SDIO), a simplified media independent interface (RMII), a synchronous serial interface, a wireless network interface, and a wired network interface (SFC), each of which is operable to connect external devices having different interface types, including the image sensor 10 and the 5G communication module 50. The image sensor 10 is connected with a video input interface of the Hi3516CV300 video processing chip, and the 5G communication module 50 is connected with a USB interface of the Hi3516CV300 video processing chip 20.
The Hi3516CV300 video processing chip can provide various different interfaces, so that external equipment can be conveniently accessed by different interface types, and a communication module of which the model is MH50005G is combined.
In one embodiment, the video streaming system further includes a cloud platform 60 for receiving the digital video signal transmitted by the 5G communication module 50.
The video streaming transmission system for monitoring the transformer substation adopts a Hi3516CV300 video processing chip to encode, analyze and process analog video signals acquired by an image sensor, adopts a DDR3 or DDR4 type external memory to store video data, and carries out wireless transmission on the video data through a MH50005G communication module, in order to avoid interference of signals in a 5G communication frequency band on clock signals of the external memory, a low-pass filter circuit is arranged between the clock of an external memory interface of the video processing chip and the clock of the external memory, the signals in the 5G communication frequency band are filtered, the image quality and the transmission rate of monitoring videos of the transformer substation are improved, the downlink transmission rate of the video streaming transmission system is up to 2Gbps, the uplink transmission rate of the video streaming transmission system is up to 230Mbps, and the operation speed of the video streaming transmission system is 14400DMPIS.
The type of the video processing chip, the type of the external memory, and the type of the 5G communication module are preferably set, which is not limited in the embodiment of the present application, and if devices of other types can also implement the solution of the embodiment of the present application, the concept of the embodiment of the present application is also within the concept of the embodiment of the present application.
In summary, although the present invention has been disclosed with reference to the preferred embodiments, the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention within the technical scope of the present invention.
Claims (10)
1. A video streaming system for substation monitoring, comprising:
the image sensor is used for acquiring an analog video signal of the transformer substation;
the video processing chip is connected with the image sensor and is used for processing the analog video signal collected by the image sensor and converting the analog video signal into a digital video signal;
the external memory is connected with the video processing chip and is used for storing the digital video signal;
the filter circuit is connected with a clock of an external memory interface of the video processing chip at one end and is connected with the clock of the external memory at the other end, and is used for filtering signals of a 5G communication frequency band so as to avoid generating interference on clock signals of the external memory;
and the 5G communication module is connected with the video processing chip and is used for wirelessly transmitting the digital video signal.
2. The video streaming system for substation monitoring of claim 1, wherein the model of the video processing chip is Hi3516CV300.
3. The video streaming system for substation monitoring according to claim 1, wherein the external memory is of model DDR3 or DDR4.
4. The video streaming system for substation monitoring of claim 1, wherein the filter circuit is a low pass filter circuit.
5. The video streaming system for monitoring the transformer substation according to claim 4, wherein the low-pass filter circuit comprises a resistor R1, a resistor R2, a capacitor C1, a capacitor C2 and an operational amplifier U, one end of the resistor R1 is connected to a clock of an external memory interface of the video processing chip, the other end of the resistor R1 is connected to one end of the resistor R2 and one end of the capacitor C1 respectively, the other end of the capacitor C1 is connected to an output end of the operational amplifier U, the other end of the resistor R2 is connected to a non-inverting input end of the operational amplifier U and one end of the capacitor C2, the other end of the capacitor C2 is grounded, an inverting input end of the operational amplifier U is connected to the output end of the operational amplifier U, and the output end of the operational amplifier U is connected to the clock of the external memory;
wherein, the resistance value of R1 is 1.6 omega, the resistance value of R2 is 3.9 omega, the capacity value of C1 is 120pF, and the capacity value of C2 is 5pF.
6. The video streaming system for substation monitoring of claim 1, wherein the 5G communication module is model MH5000.
7. The video streaming system for substation monitoring according to claim 2, wherein the video processing chip of model number Hi3516CV300 comprises a USB interface, a memory card interface, a simplified media independent interface, a synchronous serial interface, a wireless network interface, and a wired network interface, each interface being usable for connecting external devices having different interface types, the external devices comprising the image sensor and a 5G communication module.
8. The video streaming system for substation monitoring according to claim 1, further comprising a cloud platform for receiving the digital video signal sent by the 5G communication module.
9. The video streaming system for substation monitoring according to claim 1, wherein the video streaming system has a downlink transmission rate of up to 2Gbps and an uplink transmission rate of up to 230Mbps.
10. The video streaming system for substation monitoring according to claim 2, wherein the video streaming system has an operational speed of 14400DMPIS.
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| CN202223104872.1U CN218550012U (en) | 2022-11-22 | 2022-11-22 | Video streaming transmission system for transformer substation monitoring |
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| CN202223104872.1U CN218550012U (en) | 2022-11-22 | 2022-11-22 | Video streaming transmission system for transformer substation monitoring |
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