CN212572572U - RSU signal strength detection device - Google Patents
RSU signal strength detection device Download PDFInfo
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- CN212572572U CN212572572U CN202021564132.4U CN202021564132U CN212572572U CN 212572572 U CN212572572 U CN 212572572U CN 202021564132 U CN202021564132 U CN 202021564132U CN 212572572 U CN212572572 U CN 212572572U
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Abstract
The utility model discloses a RSU signal strength detection device, the device includes the casing, be provided with the direction antenna in the casing, the direction antenna adds the director at needs radiation direction, does not need radiation direction to add the reflector to obtain stronger directionality. The signal output end of the radio frequency receiving antenna is connected with the signal input end of the MCU control chip through a radio frequency gain circuit; the laser probe is connected with the MCU control chip in a two-way mode through a modulation detection circuit and used for sending and receiving laser ranging signals under the control of the MCU control chip and sending the laser ranging signals to the MCU control chip for processing to obtain distance information between the device and the RSU microwave read-write antenna. The device collects measurement and display low-power consumption handheld terminal equipment, is convenient to carry, is simple to operate, and is suitable for all-weather working environment.
Description
Technical Field
The utility model relates to a highway charge control system especially relates to a RSU signal strength detection device.
Background
In the construction of an ETC system, the installation and debugging of the RSU microwave read-write antenna are one of important links, and the signal strength and the coverage range directly influence the success rate of deduction of OBU identification after the ETC system is opened and the experience of users, so that great difficulty is brought to installation and debugging personnel. As the wireless radio frequency communication technology is adopted in the 5.8GHz communication, the signal intensity detection needs to be carried out through special detection equipment, the traditional detection needs to be carried out through equipment such as a network analyzer and the like, and the equipment has the advantages of high price, heavy volume, higher requirements on the testing environment and the skill level of operators and is not suitable for outdoor operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem how to provide a convenient to carry, easy operation is applicable to all-weather operational environment's RSU signal strength detection device.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: an RSU signal strength detection device comprises a shell and is characterized in that a guide antenna is arranged in the shell and used for shielding surrounding interference radiation signals to enable the directivity of a radio frequency receiving antenna to be stronger, the radio frequency receiving antenna is located in a metal shielding cover, irrelevant signals are shielded through the metal shielding cover, the signal output end of the radio frequency receiving antenna is connected with the signal input end of an MCU control chip through a radio frequency gain circuit, the radio frequency receiving antenna directionally collects radio frequency signals of an RSU microwave read-write antenna through the guide antenna and amplifies the received signals through the radio frequency gain circuit, and the processed radio frequency signals are transmitted to the MCU control chip for processing; the laser probe is bidirectionally connected with the MCU control chip through a modulation detection circuit and is used for sending and receiving laser ranging signals under the control of the MCU control chip and sending the laser ranging signals to the MCU control chip for processing to obtain distance information between the device and the RSU microwave read-write antenna; the human-computer interaction module is bidirectionally connected with the MCU control chip and is used for inputting control commands and displaying output data; the power module is connected with the power input end of a module needing power supply in the device and used for providing a working power supply for the device, the power module comprises a battery and a charge and discharge management module, and the battery is connected with the power input end of the MCU control chip through the charge and discharge management module.
The further technical scheme is as follows: the human-computer interaction module comprises an LCD display screen and an operation key, wherein the LCD display screen is connected with the signal output end of the MCU control chip and is used for displaying data output by the MCU control chip; and the operation key is connected with the signal input end of the MCU control chip and is used for inputting a control command into the MCU control chip.
Preferably, the LCD display screen adopts 320 × 240 bit LCD display screen and has a high-brightness LED backlight lamp.
Preferably, the radio frequency receiving antenna adopts a 5.8GHz microwave radio frequency antenna.
The further technical scheme is as follows: the modulation detection circuit comprises a laser modulation circuit and a photoelectric detection circuit, a laser light source is red visible laser, bias current is 30mA, modulation current amplitude is 8mA, a master vibration modulation signal obtained after a signal source outputs a low-pass filter is a voltage signal, and a broadband transconductance operational amplifier is used for obtaining a current modulation signal.
The further technical scheme is as follows: the photoelectric detection circuit adopts a photoelectric detection preamplifier circuit, the peak-to-peak value of an effective output signal is greater than 20rnV, and the response speed is less than 20 ns.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: this application the device collection is measured and is shown handheld terminal equipment of low-power consumption as an organic whole, not only convenient to carry, and easy operation is applicable to all-weather operational environment moreover, provides convenient service for on-the-spot operating personnel installation and debugging RSU microwave read write antenna to reduce installation and debugging expense, shorten construction period, reach the purpose of reducing costs and improving efficiency.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic exploded view of a detection device according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a detection device according to an embodiment of the present invention;
FIG. 3 is a flow chart of an algorithm in an embodiment of the present invention;
FIG. 4 is a flow chart of an algorithm in an embodiment of the present invention;
wherein: 1. a housing; 2. a directional antenna; 3. a radio frequency receiving antenna; 4. a metal shield case; 5. a laser probe; 6. the MCU control chip; 7. an LCD display screen; 8. operating a key; 9. a power switch; 10. and a battery compartment.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the 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 a person skilled in the art without creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1-2, the embodiment of the present invention discloses an RSU signal strength detection device, which includes a housing 1, and the housing is generally made of plastic material. The casing 1 is internally provided with a guide antenna, the guide antenna is added with a director in a required radiation direction, a reflector is not required to be added in the radiation direction, and therefore the stronger directivity is obtained. And the signal output end of the radio frequency receiving antenna 3 is connected with the signal input end of the MCU control chip 6 through a radio frequency gain circuit. The radio frequency receiving antenna 3 directionally collects radio frequency signals of the RSU microwave read-write antenna through the guiding antenna, the received signals are amplified through the radio frequency gain circuit, the processed radio frequency signals are transmitted to the MCU control chip 6 to be processed, the radio frequency receiving antenna 3 is located in the metal shielding cover 4, irrelevant signals are shielded through the metal shielding cover 4, and therefore the accuracy of signal detection is improved.
The laser probe is bidirectionally connected with the MCU control chip 6 through a modulation detection circuit and is used for sending and receiving laser ranging signals under the control of the MCU control chip 6 and sending the laser ranging signals to the MCU control chip 6 for processing to obtain distance information between the device and the RSU microwave read-write antenna; the human-computer interaction module is bidirectionally connected with the MCU control chip and is used for inputting control commands and displaying output data; the power supply module is connected with a power supply input end of a module needing power supply in the device and used for providing working power supply for the module.
Further, as shown in fig. 2, the human-computer interaction module may include an LCD display 7 and an operation key 8 (the operation key 8 may include a plurality of keys), where the LCD display 7 is connected to a signal output end of the MCU control chip 6, and is configured to display data output by the MCU control chip 6; the operation key 8 is connected with a signal input end of the MCU control chip 6, and is configured to input a control command into the MCU control chip 6, and it should be noted that the human-computer interaction module may also use a touch screen, and implement information input and output functions through the touch screen.
Further, as shown in fig. 2, the power module includes a battery and a charge and discharge management module, the battery is connected to the power input end of the MCU control chip through the charge and discharge management module, and it should be noted that the charge and discharge management module is in the prior art and is not described herein again.
Preferably, the graphic display adopts a 320 × 240 LCD display screen and a high-brightness LED backlight. The LCD display screen can display information such as RSU number, battery power, signal strength, detection distance and the like, and the high-brightness LED backlight lamp can meet the requirement of night measurement. The radio frequency receiving antenna adopts a special 5.8G microwave radio frequency chip, the integration level and the stability are high, the peripheral circuit is simple, and the zero wake-up function can be realized.
The positioning device adopts a laser collimation technology and a laser ranging technology, and the laser collimation technology is used for positioning the radiation angle of the RSU microwave read-write antenna and the directivity of the detection equipment by utilizing the characteristics that the laser directivity is strong and the divergence is not easy. The laser ranging technology is characterized in that pulse laser coding information with specific frequency is sent, a specific pulse signal is received through a vacuum degree sensor, decoding is carried out through an algorithm to measure a relative distance, and then a field intensity range is determined. The DSRC short-range communication conforms to relevant regulations of GB/T20851.1-GB/T20851.3.
Furthermore, the positioning device adopts a laser ranging circuit, and comprises a modulation circuit and a photoelectric detection circuit. A laser modulation circuit: the laser light source is common red visible laser; the bias current is 30 mA; the modulation current amplitude is about 8 mA. The signal source outputs a master oscillation modulation signal obtained by passing through the low-pass filter as a voltage signal, but the modulation characteristic of the LD requires a current signal, so that the current modulation signal is obtained by using a broadband transconductance operational amplifier. Photoelectric detection circuit: the peak-to-peak value of an effective output signal is greater than 20rnV by adopting a photoelectric detection preamplifier circuit; the response speed is less than 20 ns.
Correspondingly, the method for adjusting the position of the RSU microwave read-write antenna by using the RSU signal strength detection device is further disclosed, wherein a 1600mAh 3.7V soft-package lithium battery is installed in a battery bin 10 of the RSU signal strength detection device, a power switch 9 is turned on to supply power to the detection device, an operation key 8 is pressed down, a laser probe 5 emits a laser beam and a ranging pulse signal, a constructor holds the detection device by hand to point to the RSU microwave read-write antenna from a vehicle detection position to determine the distance between the detection device and the RSU microwave read-write antenna and feeds the distance back to an LCD display screen 7 of the detection device; the radio frequency receiving antenna 3 in the metal shielding cover 4 directionally collects radio frequency signals of the RSU microwave read-write antenna through the guiding antenna and transmits the radio frequency signals to the MCU control chip, the MCU control chip feeds back radio frequency signal strength values to the LCD display screen 7 through DSRC protocol analysis and algorithm analysis, and constructors compare the distance and the signal strength with a set detection range to adjust the installation position, the radiation angle and the emission strength of the RSU microwave read-write antenna, so that the requirement of the signal strength is met in a vehicle transaction range.
Furthermore, the detection device samples the radio frequency signal of the RSU microwave read-write antenna through an analog-to-digital converter, quantizes the power value in a 50dB quantization dynamic range with the accuracy of 5 bits, stores the power value in a corresponding register, and automatically updates the value in the register when FSF (0x7E) is detected so as to judge the strength of the radio frequency signal of the RSU microwave read-write antenna in real time.
In order to illustrate the algorithmic analysis module of the device, the following is illustrated by means of flow charts 3 and 4. Fig. 3 is a main flow of algorithm analysis, and fig. 4 is an implementation process of a bubble-like sorting algorithm. The algorithm analysis module has the functions of: the newly generated data is stored in the global array, then the largest three elements in the global array are displayed on the display screen, and if the last displayed element exists in the current display, the display position needs to be kept unchanged. By the algorithm and the mobile handheld device, the antenna distribution in the space can be corresponding to the display content on the display screen.
This application the device collection is measured and is shown handheld terminal equipment of low-power consumption as an organic whole, not only convenient to carry, and easy operation is applicable to all-weather operational environment moreover, provides convenient service for on-the-spot operating personnel installation and debugging RSU microwave read write antenna to reduce installation and debugging expense, shorten construction period, reach the purpose of reducing costs and improving efficiency.
Claims (6)
1. An RSU signal strength detection device comprises a shell (1) and is characterized in that a guide antenna (2) is arranged in the shell (1), the guide antenna (2) is used for shielding surrounding interference radiation signals, the directivity of a radio frequency receiving antenna (3) is enabled to be stronger, the radio frequency receiving antenna (3) is located in a metal shielding case (4), irrelevant signals are shielded through the metal shielding case (4), the signal output end of the radio frequency receiving antenna (3) is connected with the signal input end of an MCU control chip (6) through a radio frequency gain circuit, the radio frequency receiving antenna (3) directionally collects radio frequency signals of an RSU microwave reading and writing antenna through the guide antenna, the received signals are amplified through the radio frequency gain circuit, and the processed radio frequency signals are transmitted to the MCU control chip (6) for processing; the laser probe is bidirectionally connected with the MCU control chip (6) through a modulation detection circuit and is used for sending and receiving laser ranging signals under the control of the MCU control chip (6) and sending the laser ranging signals to the MCU control chip (6) for processing to obtain distance information between the device and the RSU microwave read-write antenna; the human-computer interaction module is bidirectionally connected with the MCU control chip and is used for inputting control commands and displaying output data; the power module is connected with the power input end of a module needing power supply in the device and used for providing a working power supply for the device, the power module comprises a battery and a charge and discharge management module, and the battery is connected with the power input end of the MCU control chip through the charge and discharge management module.
2. The RSU signal strength detecting apparatus according to claim 1, wherein: the man-machine interaction module comprises an LCD display screen (7) and an operation key (8), wherein the LCD display screen (7) is connected with the signal output end of the MCU control chip (6) and is used for displaying data output by the MCU control chip (6); and the operation key (8) is connected with the signal input end of the MCU control chip (6) and is used for inputting a control command into the MCU control chip (6).
3. The RSU signal strength detecting apparatus according to claim 2, wherein: the LCD display screen (7) adopts 320-240 bit LCD display screen and is provided with a high-brightness LED backlight lamp.
4. The RSU signal strength detecting apparatus according to claim 1, wherein: the radio frequency receiving antenna (3) adopts a 5.8GHz microwave radio frequency antenna.
5. The RSU signal strength detecting apparatus according to claim 1, wherein: the modulation detection circuit comprises a laser modulation circuit and a photoelectric detection circuit, a laser light source is red visible laser, bias current is 30mA, modulation current amplitude is 8mA, a master vibration modulation signal obtained after a signal source outputs a low-pass filter is a voltage signal, and a broadband transconductance operational amplifier is used for obtaining a current modulation signal.
6. The RSU signal strength detecting apparatus according to claim 5, wherein: the photoelectric detection circuit adopts a photoelectric detection preamplifier circuit, the peak-to-peak value of an effective output signal is greater than 20rnV, and the response speed is less than 20 ns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021564132.4U CN212572572U (en) | 2020-07-31 | 2020-07-31 | RSU signal strength detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021564132.4U CN212572572U (en) | 2020-07-31 | 2020-07-31 | RSU signal strength detection device |
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| CN212572572U true CN212572572U (en) | 2021-02-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117114024A (en) * | 2023-10-25 | 2023-11-24 | 中诚华隆计算机技术有限公司 | SOC chip capable of reducing unnecessary NFC recognition times |
| CN117131887A (en) * | 2023-10-25 | 2023-11-28 | 中诚华隆计算机技术有限公司 | SOC chip with low energy consumption |
-
2020
- 2020-07-31 CN CN202021564132.4U patent/CN212572572U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117114024A (en) * | 2023-10-25 | 2023-11-24 | 中诚华隆计算机技术有限公司 | SOC chip capable of reducing unnecessary NFC recognition times |
| CN117131887A (en) * | 2023-10-25 | 2023-11-28 | 中诚华隆计算机技术有限公司 | SOC chip with low energy consumption |
| CN117131887B (en) * | 2023-10-25 | 2024-01-09 | 中诚华隆计算机技术有限公司 | SOC chip with low energy consumption |
| CN117114024B (en) * | 2023-10-25 | 2024-01-16 | 中诚华隆计算机技术有限公司 | SOC chip capable of reducing unnecessary NFC recognition times |
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Address after: 050000 Floor 19, Aviation Building, No. 9, Shiqing Road, Xinhua District, Shijiazhuang City, Hebei Province Patentee after: Hebei Jiaotou Intelligent Technology Co.,Ltd. Address before: 050051 No.52, Xinshi North Road, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee before: HEBEI INTELLIGENT TRANSPORTATION TECHNOLOGYY CO.,LTD. OF HEBTIG |
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