CN216013659U - Handheld radar speed measuring circuit and speed measuring instrument thereof - Google Patents
Handheld radar speed measuring circuit and speed measuring instrument thereof Download PDFInfo
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- CN216013659U CN216013659U CN202121778848.9U CN202121778848U CN216013659U CN 216013659 U CN216013659 U CN 216013659U CN 202121778848 U CN202121778848 U CN 202121778848U CN 216013659 U CN216013659 U CN 216013659U
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Abstract
The utility model provides a handheld radar speed measuring circuit and a speed measuring instrument thereof, wherein the handheld radar speed measuring circuit comprises a single chip microcomputer U1, a power supply module and a radar module U2, the radar module U2 is in serial communication connection with the single chip microcomputer U1, the radar module U2 and the single chip microcomputer U1 are both electrically connected with the power supply module, the handheld radar speed measuring circuit also comprises a precision selection module and a display module, and the single chip microcomputer U1 is provided with a plurality of serial ports and a plurality of GPIO ports; the precision selection module and the display module are both in communication connection with a GPIO port of the singlechip U1 and are both electrically connected with the power supply module; the precision selection module detects four states of high and low levels of two pins of the dial switch through the single chip microcomputer U1, and adjusts four gears of the test distance of the radar module U2; the singlechip U1 judges the speed of the object to be tested according to the test distance; the display module is used for outputting and displaying the speed of the measured object; the power supply module provides working voltage for the radar module U2 and the display module.
Description
Technical Field
The utility model relates to the technical field of radar speed measurement, in particular to a handheld radar speed measurement circuit and a speed meter thereof.
Background
In recent years, with the development of technology, various motor vehicles and factories and vehicles are widely used, and in order to establish a perfect speed measurement quality system, a radar test technology is mostly adopted at present, so that powerful technical support and guarantee are provided for test data. The radar speed measurement mainly utilizes the Doppler effect principle: when the target approaches the radar antenna, the reflected signal frequency will be higher than the transmitter frequency; conversely, when the target moves away from the antenna, the reflected signal frequency will be lower than the transmitter frequency. Therefore, the relative speed of the target and the radar can be calculated by changing the value of the frequency, wherein the target flies facing the radar, the Doppler frequency is positive, and when the target flies away from the radar, the Doppler frequency is negative.
The radar velocimeter is widely applied in traffic management departments, but the conventional overspeed snapshot is realized basically by utilizing a fixed point mode, and the radar velocimeter is inconvenient to move together; there are various handheld radar tachymeters in the existing market, the structure is small and exquisite really, and it is very convenient to carry, nevertheless surveys super low-speed, and the examination certificate is waited to high-speed precision, and does not have the printing function mostly, perhaps prints the function and is connected to other equipment for it is very inconvenient to operate.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a handheld radar velocimeter and a velocimeter thereof, which solve the problems that the existing radar velocimeter is inconvenient to move and low in measurement precision.
The technical scheme of the utility model is realized as follows: the utility model provides a handheld radar speed measurement circuit, which comprises a singlechip U1, a power supply module, a radar module U2, a precision selection module and a display module, wherein the radar module U2 is in serial communication connection with the singlechip U1, the radar module U2 and the singlechip U1 are both electrically connected with the power supply module, the precision selection module and the display module are arranged on the singlechip U1,
the single chip microcomputer U1 is provided with a plurality of serial ports and a plurality of GPIO ports;
the precision selection module and the display module are both in communication connection with a GPIO port of the singlechip U1 and are both electrically connected with the power supply module;
the precision selection module detects four states of high and low levels of two pins of the dial switch through the single chip microcomputer U1, and adjusts four gears of the test distance of the radar module U2; the singlechip U1 judges the speed of the object to be tested according to the test distance; the display module is used for outputting and displaying the speed of the measured object; the power supply module provides working voltage for the radar module U2 and the display module.
On the basis of the above technical solution, it is preferable that the printer further includes a printer trigger module and a printer module U3, wherein,
a power supply pin of the printer module U3 is connected with a 9V power supply, and a serial port pin of the printer module U3 is respectively and electrically connected with the resistor R12 and the resistor R13 and is in serial communication connection with the single chip microcomputer through the serial port pin;
the power pin of printer trigger module inserts the 3.3V power, and printer trigger module and singlechip U1's GPIO port communication connection detect the high-low level state of key switch pin through singlechip U1, control opening or closing of printer module.
On the basis of the above technical solution, preferably, the precision selection module includes a dial switch U4, a resistor R20 and a resistor R21, wherein,
a pin 1 and a pin 4 of the dial switch U4 are connected in parallel to a 3.3V power supply and are in communication connection with the singlechip U1 through a pin 2 and a pin 3;
On the basis of the technical scheme, preferably, a power supply pin of the radar module U2 is connected to a 12V power supply, and a serial port pin of the radar module U2 is electrically connected with the resistor R16 and the resistor R17 respectively and is in serial communication connection with the singlechip U1 through the serial port pin.
On the basis of the above technical solution, preferably, the display module includes a nixie tube U5 and a driving chip U6, wherein,
the nixie tube U5 displays data measured by the radar module U2;
the power supply pin of the drive chip U6 is connected with a 5V power supply and is used for driving the nixie tube U5, and the clock input port, the data input port and the high-level enable port of the drive chip U6 are all in communication connection with the single chip microcomputer.
On the basis of the above technical solution, preferably, the power module includes a battery holder U7, a charging port U8, a circuit of converting DC12V into 9V and a circuit of converting DC12V into 3.3V, wherein,
the battery seat U7 and the charging port U8 are both electrically connected with the input end of a circuit for converting DC12V into 9V;
the DC 12V-to-9V circuit is provided with a 12V power supply and a 9V power supply output lead;
the power input end of the circuit for converting DC12V into 3.3V is connected with a 12V power supply of the circuit for converting DC12V into 9V, the circuit for converting DC12V into 3.3V is provided with output leads of a 5V power supply and a 3.3V power supply, and a power supply pin of the single chip microcomputer U1 is connected with the 3.3V power supply.
A hand-held radar velocimeter, wherein the hand-held radar velocimeter circuit is arranged in a shell, the shell comprises a main shell, a handle and a groove shell, wherein,
the main shell and the groove shell are respectively arranged at the upper end and the lower end of the handle, the handle is hollow, and the inner cavities of the main shell, the handle and the groove shell are communicated;
the radar module U2 is arranged at one end of the main shell, the display module and the switch are both arranged at the other end of the main shell, the dial switch U4 of the precision selection module is arranged at one side of the main shell, and the battery holder U7 is arranged on the inner wall of the main shell;
a key switch U13 of the printer trigger module is arranged on one side of the handle, and a charging port U8 is arranged on the other side of the handle;
printer module U3 sets up in the recess casing intracavity, and recess casing notch is down, and printer module U3's exit slot is located the notch department of recess casing.
Compared with the prior art, the handheld radar speed measurement circuit and the speed measurement instrument thereof have the following beneficial effects:
(1) through setting up the precision selection module, detect four kinds of states of two pin height level of dial switch through the singlechip, the state is 00, 01, 10 and 11 respectively to carry out the regulation of four gears to the test distance of radar speed measuring module, can be according to test distance and test speed, adjust radar module to the fender position that suits through the precision selection module, thereby guarantee its measuring accuracy.
(2) Set up printer module, through printer module and singlechip serial communication connection to through printer trigger module and singlechip GPIO port communication connection, control printer module operation is printed, can directly print the data that radar module surveyed, need not connect the printer in addition again and print, makes the convenient removal of tachymeter, and the flexible operation is convenient for print.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a handheld radar speed measurement circuit according to the present invention;
FIG. 2 is a circuit diagram of a single chip in a hand-held radar velocimeter according to the present invention;
FIG. 3 is a circuit diagram of a radar module in a handheld radar speed measurement circuit according to the present invention;
FIG. 4 is a circuit diagram of a printer module in a hand-held radar tachometer circuit according to the present invention;
FIG. 5 is a circuit diagram of a precision selection module in a handheld radar velocimeter according to the present invention;
FIG. 6 is a circuit diagram of a printer trigger module in a handheld radar tachometer circuit according to the present invention;
FIG. 7 is a circuit diagram of a display module of the handheld radar velocimeter of the present invention;
FIG. 8 is a circuit diagram of a circuit for converting DC12V to 9V in a handheld radar tachometer circuit according to the present invention;
FIG. 9 is a circuit diagram of a circuit for converting DC12V to 3.3V in a handheld radar velocimeter according to the present invention;
fig. 10 is a schematic structural diagram of a handheld radar velocimeter according to the present invention.
In the figure: 1. main casing body, 2, handle, 3, recess casing, 4, display module, 5, switch, U2, radar module, U3, printer module, U4, dial switch, U7, battery holder, U8, the mouth that charges, U13, key switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1-10, the handheld radar speed measuring circuit and the speed measuring instrument thereof of the present invention include a single chip microcomputer U1, a power supply module, a radar module U2, a precision selection module, a printer module U3, a printer trigger module, a display module 44, a DC12V to 9V circuit, a DC12V to 3.3V circuit, a main housing 1, a handle 2, a groove housing 3, and a switch 5.
The single chip microcomputer U1, the power supply module, the radar module U2, the precision selection module, the printer module U3, the printer trigger module, the display module 4, the DC 12V-to-9V circuit and the DC 12V-to-3.3V circuit are all arranged in a shell cavity, and the shell comprises a main shell 1, a handle 2 and a groove shell 3; the handle 2 is hollow, the main shell 1 and the groove shell 3 are respectively arranged at the upper end and the lower end of the handle 2, inner cavities of the three are communicated and integrated by injection molding, the three are symmetrically divided into two halves, and the two halves are fixed by screws, so that the mounting, dismounting or replacement of internal parts is facilitated.
In one embodiment of the present invention, the power module is used as a power supply unit for each power utilization device in the velocimeter, and the power module includes an electrical socket U7, a charging port U8, a circuit from DC12V to 9V, and a circuit from DC12V to 3.3V. The electric socket U7 and the charging port U8 are both electrically connected with the input end of a circuit of converting DC12V into 9V, the electric socket U7 is arranged on the inner wall of the main shell 1, and a battery can be arranged on the electric socket U7; the charging port U8 is arranged on one side of the handle 2, the battery can be charged through the charging port U8, and power can be directly supplied to each electric component in the velocimeter through the charging port U8; the output voltage of the electric socket U7 and the charging port U8 is 12V, a circuit for converting DC12V into 9V converts a 12V POWER supply into a 9V POWER supply through a transformer U8, a POWER supply management circuit is arranged at the 9V POWER supply, and a high-level enabling port PT _ POWER _ EN of the POWER supply management circuit is in communication connection with the single chip microcomputer U1; the 12V power supply is electrically connected with the receiving end of the DC 12V-to-3.3V circuit, the DC 12V-to-3.3V circuit converts the 12V power supply into a 5V power supply through the transformer U12, and then converts the 5V power supply into a 3.3V power supply through the transformer U13.
The utility model discloses an in a concrete implementation, the arithmetic processing unit of each electron spare part in the singlechip U1 conduct the tachymeter, can adopt STM32F103C8T6 model, singlechip U1's power pin inserts the 3.3V power, singlechip U1 is provided with a plurality of serial ports and a plurality of GPIO port, radar module U2 and printer module U3 all with singlechip U1 serial communication connection, the precision is selected the module, printer trigger module and display module all with singlechip U1's GPIO port communication connection.
The radar module U2 is used as a data acquisition unit of the velocimeter and can adopt an LDTR04Plus model, a power supply pin of the radar module U2 is connected with a 12V power supply, and a serial port pin of the radar module U2 is respectively and electrically connected with a resistor R16 and a resistor R17 and is in serial communication connection with the singlechip U1 through the serial port pin; the radar module U2 is provided at one end of the main casing 1 for detecting the traveling speed of the vehicle. The precision selection module is used as a regulation and control unit of a testing distance of a radar module U2 and comprises a dial switch U4, a resistor R20 and a resistor R21, a pin 1 and a pin 4 of the dial switch U4 are connected in parallel with a 3.3V power supply and are in communication connection with a single chip microcomputer U1 through a pin 2 and a pin 3, a pin 2 of a dial switch U4 is electrically connected with the resistor R21, a pin 3 of the dial switch U4 is electrically connected with a resistor R20, the resistor R20 and the resistor R21 are grounded in parallel, a precision selection circuit detects four states of high and low levels of two pins of the dial switch through the single chip microcomputer, and the four states are 00, 01, 10 and 11 respectively, so that four gears of the testing distance of the radar speed measurement module are adjusted; the dial switch U4 of the accuracy selection module is disposed on the main housing side. The display module 4 comprises a nixie tube U5 and a driving chip U6, the nixie tube U5 can adopt an FJ3461BH model and is 4-digit and is used for displaying data measured by the display radar module U2, the driving chip U6 can adopt a 74HC595D model and drives the nixie tube U5 through two driving chips U6, a power pin of the driving chip U6 is connected with a 5V power supply, clock input ports of the two driving chips U6 are connected in parallel, and the clock input port, the data input port and the high-level enabling port of the driving chip U6 are all in communication connection with the single chip microcomputer; the display module 4 is disposed at the other end of the main casing 1. The printer module U3 can adopt a MY-E4 model, a power supply pin of the printer module U3 is connected with a 9V power supply, and a serial port pin of the printer module U3 is respectively and electrically connected with a resistor R12 and a resistor R13 and is in serial communication connection with the single chip microcomputer through the serial port pin; printer module U3 is used for printing the data that radar module U2 surveyed or print other information, and printer module U3 is fixed to be set up in 3 intracavitys of recess casing, and 3 notches of recess casing are downward, and printer module U3's exit slot is located the notch department of recess casing 3, is convenient for go out the paper when printing. A power pin of the printer trigger module is connected with a 3.3V power supply, the printer trigger module is in communication connection with a GPIO port of the single chip microcomputer U1, and the single chip microcomputer U1 is used for detecting the high and low level state of a key switch pin and controlling the opening or closing of the printer module; the button switch U13 of printer trigger module sets up on handle 2, with the one side that charges mouthful U8 and back to be located the forefinger position of handle 2, be convenient for print the operation. Preferably, the display device further comprises a switch 5, wherein the switch 5 is arranged on the main shell 1 and is positioned on the end face where the display module 4 is positioned; the switch 2 can adopt the prior art and is used for controlling the opening or closing of the velocimeter.
For the convenience of understanding the above technical solution of the present invention, the following detailed description of the above technical solution of the present invention is made by specific use of:
when the handheld radar velocimeter is used specifically, the speedometer can be started by holding the handle 2 and pressing the switch 5; according to the testing distance and the testing speed, the accuracy selection module adjusts the radar module U2 to a corresponding gear so as to ensure the testing accuracy; then the radar module U2 points to the tested vehicle, and the test result is displayed on the display module 4; the printer triggers the key switch U13 of the module, and the test result can be printed out at the paper outlet of the printer module U3.
The chip related to the utility model is easy to obtain, and can obtain a data manual at the same time of obtaining the chip, and the utility model does not relate to the improvement of the procedure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a hand-held type radar speed sensor circuit, its includes singlechip U1, power module, radar module U2, radar module U2 and singlechip U1 serial communication connection, radar module U2 and singlechip U1 all with power module electric connection, its characterized in that: also comprises a precision selection module and a display module (4), wherein,
the single chip microcomputer U1 is provided with a plurality of serial ports and a plurality of GPIO ports;
the precision selection module and the display module (4) are both in communication connection with a GPIO port of the singlechip U1 and are both electrically connected with the power supply module;
the precision selection module detects four states of high and low levels of two pins of the dial switch through the single chip microcomputer U1, and adjusts four gears of the test distance of the radar module U2; the singlechip U1 judges the speed of the object to be tested according to the test distance; the display module (4) is used for outputting and displaying the speed of the measured object; the power supply module provides working voltage for the radar module U2 and the display module (4).
2. A hand-held radar tachometer circuit according to claim 1, wherein: and a printer trigger module and printer module U3, wherein,
a power supply pin of the printer module U3 is connected with a 9V power supply, and a serial port pin of the printer module U3 is respectively and electrically connected with the resistor R12 and the resistor R13 and is in serial communication connection with the single chip microcomputer through the serial port pin;
the power pin of printer trigger module inserts the 3.3V power, and printer trigger module and singlechip U1's GPIO port communication connection detect the high-low level state of key switch pin through singlechip U1, control opening or closing of printer module.
3. A hand-held radar tacho circuit according to claim 1 or 2, wherein: the precision selection module comprises a dial switch U4, a resistor R20 and a resistor R21, wherein,
a pin 1 and a pin 4 of the dial switch U4 are connected in parallel to a 3.3V power supply and are in communication connection with the singlechip U1 through a pin 2 and a pin 3;
pin 2 of the toggle switch U4 is electrically connected to the resistor R21, pin 3 of the toggle switch U4 is electrically connected to the resistor R20, and the resistor R20 and the resistor R21 are grounded in parallel.
4. A hand-held radar tacho circuit according to claim 1 or 2, wherein: the power supply pin of the radar module U2 is connected to a 12V power supply, and the serial port pin of the radar module U2 is electrically connected with the resistor R16 and the resistor R17 respectively and is in serial communication connection with the single chip microcomputer U1 through the serial port pin.
5. A hand-held radar tacho circuit according to claim 1 or 2, wherein: the display module (4) comprises a nixie tube U5 and a drive chip U6, wherein,
the nixie tube U5 displays data measured by the radar module U2;
the power supply pin of the drive chip U6 is connected with a 5V power supply and is used for driving the nixie tube U5, and the clock input port, the data input port and the high-level enable port of the drive chip U6 are all in communication connection with the single chip microcomputer.
6. A hand-held radar tachometer circuit according to claim 1, wherein: the power module includes a battery holder U7, a charging port U8, a DC12V to 9V circuit, and a DC12V to 3.3V circuit, wherein,
the battery seat U7 and the charging port U8 are both electrically connected with the input end of a circuit for converting DC12V into 9V;
the DC 12V-to-9V circuit is provided with a 12V power supply and a 9V power supply output lead;
the power input end of the circuit for converting DC12V into 3.3V is connected with a 12V power supply of the circuit for converting DC12V into 9V, the circuit for converting DC12V into 3.3V is provided with output leads of a 5V power supply and a 3.3V power supply, and a power supply pin of the single chip microcomputer U1 is connected with the 3.3V power supply.
7. A hand-held type radar velocimeter which characterized in that: a hand-held radar tacho circuit according to any of claims 1 to 6 is provided in a housing comprising a main housing (1), a handle (2) and a recess housing (3), wherein,
the main shell (1) and the groove shell (3) are respectively arranged at the upper end and the lower end of the handle (2), the handle (2) is hollow, and the inner cavities of the main shell (1), the handle (2) and the groove shell (3) are communicated;
the radar module U2 is arranged at one end of the main shell (1), the display module (4) and the switch (5) are both arranged at the other end of the main shell (1), the dial switch U4 of the precision selection module is arranged at one side of the main shell (1), and the battery holder U7 is arranged on the inner wall of the main shell (1);
a key switch U13 of the printer trigger module is arranged on one side of the handle (2), and a charging port U8 is arranged on the other side of the handle (2);
the printer module U3 is arranged in the cavity of the groove shell (3), the notch of the groove shell (3) is downward, and the paper outlet of the printer module U3 is positioned at the notch of the groove shell (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121778848.9U CN216013659U (en) | 2021-07-31 | 2021-07-31 | Handheld radar speed measuring circuit and speed measuring instrument thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121778848.9U CN216013659U (en) | 2021-07-31 | 2021-07-31 | Handheld radar speed measuring circuit and speed measuring instrument thereof |
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| CN216013659U true CN216013659U (en) | 2022-03-11 |
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| CN202121778848.9U Active CN216013659U (en) | 2021-07-31 | 2021-07-31 | Handheld radar speed measuring circuit and speed measuring instrument thereof |
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