Initial speed measuring device

Abstract

The utility model discloses an initial speed measuring device which comprises a front-end acquisition device and a rear-end processing device. The front-end acquisition equipment comprises an acquisition chip, and a signal transmitting unit, a signal receiving unit and a zero-time signal triggering unit which are connected with the acquisition chip, and the acquisition chip is connected with the rear-end processing equipment through a photoelectric hybrid cable; the signal transmitting unit is used for transmitting a single-frequency continuous wave signal, the signal receiving unit is used for receiving a Doppler echo signal of the single-frequency continuous wave signal, the zero-time signal triggering unit is used for generating a triggering signal when a projectile is launched, and when the triggering signal is generated, a signal path is formed between the acquisition chip and the signal receiving unit; and the signal collection unit is used for collecting the Doppler echo signals received by the signal receiving unit and transmitting the Doppler echo signals to the rear-end processing equipment through the photoelectric hybrid cable. The device is high in integration level, reliable in data transmission, high in anti-interference capability and convenient to unfold and fold.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to a muzzle velocity measuring device. BACKGROUND

[0002] For the muzzle velocity measurement of various projectiles, the test scene is variable, the traditional muzzle velocity measuring device has more components, and the terminal adopts a traditional desktop computer, in order to ensure the safety of the on-site operator, the interconnection cable between the front end and the rear end is relatively long. The problems are that the measuring device has poor portability and very poor anti-vibration performance, the ordinary cable is very heavy, and it is very troublesome to deploy and withdraw, and the ordinary cable can only realize the transmission of analog Doppler signals and power signals, the Doppler signals are susceptible to interference, and the working state information of the front end cannot be transmitted back, so the operator cannot know the working state of the front end in real time at the signal processing terminal. SUMMARY

[0003] The utility model provides a muzzle velocity measuring device to solve the problem of big volume and poor portability of the traditional muzzle velocity measuring device.

[0004] To solve the above problems, the utility model provides a muzzle velocity measuring device, comprising: a front-end acquisition device and a rear-end processing device;

[0005] The front-end acquisition device comprises an acquisition chip, a signal transmitting unit, a signal receiving unit and a zero-time signal triggering unit connected with the acquisition chip, and the acquisition chip is connected with the rear-end processing device through an optical-electric hybrid cable;

[0006] The signal transmitting unit is used for transmitting a single-frequency continuous wave signal, the signal receiving unit is used for receiving a Doppler echo signal of the single-frequency continuous wave signal, and the zero-time signal triggering unit is used for generating a trigger signal when the projectile is launched, wherein, when the trigger signal is generated, a signal path is formed between the acquisition chip and the signal receiving unit to collect the Doppler echo signal received by the signal receiving unit, and the Doppler echo signal is transmitted to the rear-end processing device through the optical-electric hybrid cable.

[0007] Optionally, the zero-time signal triggering unit is an infrared trigger, and the infrared trigger generates the trigger signal when detecting the fire light of the projectile.

[0008] Optionally, the acquisition chip comprises a zero-time switch, one end of the zero-time switch is connected with the output end of the signal receiving unit, the other end of the zero-time switch is connected with the signal collection end of the acquisition chip, the control end of the zero-time switch is connected with the output end of the zero-time signal triggering unit, and the zero-time switch is used for being in a connected state when receiving the trigger signal.

[0009] Optionally, the signal transmitting unit comprises an antenna transmitting array, and the signal receiving unit comprises an antenna receiving array.

[0010] The antenna transmitting array comprises a transmitter and a transmitting antenna, and the antenna receiving array comprises a receiver and a receiving antenna.

[0011] Optionally, the front-end acquisition device further comprises a power module, the acquisition chip comprises a power interface and a signal output interface, the optoelectrical hybrid cable comprises a front-end interface and a rear-end interface, and the front-end interface comprises a power terminal and a signal terminal.

[0012] The output end of the power module is connected with the power interface, the input end of the power module is connected with the power terminal, the signal output interface is connected with the signal terminal, and the rear-end interface is connected with the rear-end processing device.

[0013] Optionally, the front-end acquisition device further comprises a power module, and the power module is further used for supplying power to the signal transmitting unit, the signal receiving unit and the zero-time signal triggering unit.

[0014] Optionally, the front-end acquisition device further comprises an antenna seat and a support frame, the antenna seat is used for fixing the antenna transmitting array and the antenna receiving array, and the support frame is used for supporting the antenna seat.

[0015] Optionally, the rear-end processing device comprises a portable terminal.

[0016] Optionally, the rear-end processing device further comprises a communication module, and the portable terminal is communicatively connected with a data platform through the communication module.

[0017] Optionally, the portable terminal comprises a data storage and a processor, the processor is capable of analyzing and processing the initial velocity of a projectile based on the Doppler echo signal, the data storage is used for storing the Doppler echo signal and the analysis result of the processor.

[0018] The initial speed measuring device provided by the utility model discloses, including: front end acquisition equipment and rear end processing equipment, front end acquisition equipment includes acquisition chip, and signal transmitting unit, signal receiving unit and zero time signal trigger unit connected with acquisition chip, and the acquisition chip is connected between rear end processing equipment through photoelectric hybrid cable, signal transmitting unit is used for transmitting single frequency continuous wave signal, signal receiving unit is used for receiving doppler echo signal of single frequency continuous wave signal, zero time signal trigger unit is used for generating trigger signal when projectile is launched, wherein, when trigger signal generates, signal passage is formed between acquisition chip and signal receiving unit, so as to collect doppler echo signal received by signal receiving unit, and doppler echo signal is transmitted to rear end processing equipment through photoelectric hybrid cable.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, nor is it used to limit the scope of the utility model. Other features of the utility model will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is the block diagram of the initial speed measuring device provided by the utility model;

[0022] Figure 2 It is the block diagram of the initial speed measuring device provided by the utility model;

[0023] Figure 3 It is the block diagram of another initial speed measuring device provided by the utility model;

[0024] Figure 4 It is the block diagram of another initial speed measuring device provided by the utility model. DETAILED DESCRIPTION

[0025] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0027] Figure 1 is a block schematic diagram of the initial speed measuring device provided by the present application. As shown in Figure 1 , the initial speed measuring device 100 comprises: a front-end acquisition device 200 and a rear-end processing device 300;

[0028] The front-end acquisition device 200 comprises an acquisition chip 201, a signal transmitting unit 202, a signal receiving unit 203 and a zero-time signal triggering unit 204 connected with the acquisition chip 201, and the acquisition chip 201 is connected with the rear-end processing device 300 through an optical and electrical hybrid cable 400;

[0029] The signal transmitting unit 202 is used for transmitting a single-frequency continuous wave signal, the signal receiving unit 203 is used for receiving a Doppler echo signal of the single-frequency continuous wave signal, and the zero-time signal triggering unit 204 is used for generating a trigger signal when the projectile is launched. Wherein, when the trigger signal is generated, a signal path is formed between the acquisition chip 201 and the signal receiving unit 203 to collect the Doppler echo signal received by the signal receiving unit 203, and the Doppler echo signal is transmitted to the rear-end processing device 300 through the optical and electrical hybrid cable 400.

[0030] It should be noted that the muzzle velocity of the bullet is a measure of whether the equipment is qualified. Further, the muzzle velocity measurement of the bullet becomes an essential link. The current muzzle velocity measurement of the bullet generally uses the principle of Doppler effect to measure the velocity of the bullet, that is, the velocity of the bullet is measured by emitting electromagnetic waves and receiving the reflected signals. This method is not limited by the site, has a wide range of applications, especially when shooting at high angles, and is widely used. However, at present, the measuring device is still connected with the front-end device through the cable of the back-end desktop computer. For safety considerations, the back-end desktop computer needs to be far away from the front end, so that the interconnection cable is longer, and the cable is very heavy, which is very troublesome to deploy and withdraw. And it is also impossible to transmit signals to the more rear-end device. In addition, most of the current measuring devices use manual start signal collection, which makes the test results of the test device not very accurate.

[0031] Therefore, through the muzzle velocity measuring device provided by the utility model, the front-end acquisition device 200 and the rear-end processing device 300 are connected through an optical-electric hybrid cable formed based on optical fiber technology, and the optical-electric hybrid cable 400 using optical fiber technology is light in quality and long in signal transmission distance. In this way, the communication distance between the front-end acquisition device 200 and the rear-end processing device 300 is increased, the anti-interference ability is strong, and the device is convenient to deploy and withdraw.

[0032] The working principle of the muzzle velocity measuring device 100 is that the signal emitting unit 202 emits a single-frequency continuous wave signal, and then the zero-time signal triggering unit 204 triggers the collection chip 201 to collect the Doppler echo signal received by the signal receiving unit 203 at the moment of bullet emission. The collection chip 201 transmits the Doppler echo signal carrying the muzzle velocity of the bullet to the rear-end processing device 300 through the optical-electric hybrid cable 400. The calculation software is installed in the rear-end processing device 300 in advance, which can perform Fourier analysis on the Doppler echo signal, and then obtain the initial velocity of the bullet. Further, the muzzle velocity measurement of the bullet is completed.

[0033] Due to the high integration of the front-end acquisition device 200 of the measuring device 100 and the lightness of the optical-electric hybrid cable 400, the entire device has high integration and high portability. And the setting of the zero-time signal triggering unit 204 enables the operator to be far away from the bullet emission site, ensuring the safety of the operator under the premise of realizing the synchronization of signal capture and bullet emission.

[0034] Optionally, the zero-time signal triggering unit 204 is an infrared trigger, which generates a trigger signal when detecting the firelight of the bullet emission.

[0035] The infrared trigger can capture the light signal, and when the infrared trigger captures the light signal, a trigger signal can be output, and when the infrared trigger does not capture the light signal, no trigger signal is output. For example, the infrared trigger can be an infrared sensor, which outputs a first level signal after receiving light and outputs a second level signal when no light is received. When the first level signal is output, that is, when the trigger signal is output, a communication path can be formed between the acquisition chip 201 and the signal receiving unit 203, so that the acquisition chip 201 starts to collect the Doppler echo signal. In an embodiment, the acquisition chip 201 can be connected between the signal receiving unit 203 and the related circuit (such as a switch tube and the like), and the related circuit uses high and low levels to open or close. For example, the trigger signal output by the infrared trigger is a first level signal, and the switch tube is turned on. At ordinary times, the infrared trigger outputs a second level signal, and the switch tube is turned off.

[0036] Optionally, Figure 2 is a block schematic diagram of a muzzle velocity measuring device provided by the utility model, as shown in Figure 2 The acquisition chip 201 comprises a zero-time switch 205, one end of the zero-time switch 205 is connected with the output end of the signal receiving unit 203, the other end of the zero-time switch 205 is connected with the signal collection end of the acquisition chip 201, and the control end of the zero-time switch 205 is connected with the output end of the zero-time signal triggering unit 204; the zero-time switch 205 is used for being in a communication state when receiving the trigger signal.

[0037] In an embodiment, the zero-time switch 205 can be a switch tube or other switch capable of being controlled by an electric signal. The zero-time switch 205 can be in a conducting state or a closed state according to the signal received from the zero-time signal triggering unit 204. To achieve the starting of the collection of the Doppler echo signal related to the muzzle velocity of the projectile at the same time as the projectile is launched.

[0038] Optionally, Figure 3 is a block schematic diagram of another muzzle velocity measuring device provided by the utility model, as shown in Figure 3 The signal transmitting unit 202 comprises an antenna transmitting array surface 2021, and the signal receiving unit 203 comprises an antenna receiving array surface 2031.

[0039] The antenna transmitting array surface 2021 comprises a transmitter and a transmitting antenna, and the transmitter forms a single-frequency continuous wave signal; the antenna receiving array surface 2031 comprises a receiver and a receiving antenna, and the receiver is used for receiving the Doppler echo signal of the single-frequency continuous wave signal.

[0040] The transmitter can be a radar transmitter, and the receiver can be a radar receiver. The transmitter transmits a single-frequency continuous wave signal, which is radiated to a space region through a transmitting antenna. The single-frequency continuous wave signal has specific frequency characteristics and stable waveform features, and can play a key role in subsequent communication and detection applications. In addition, the receiving antenna captures relevant signals within the effective receiving range. When the single-frequency continuous wave encounters a reflector, the single-frequency continuous wave signal generates a Doppler echo signal. At this time, the receiver begins to perform its receiving function and accurately receives the Doppler echo signal of the single-frequency continuous wave signal. The receiver has high sensitivity and good signal processing capability, and can perform a series of processing operations such as amplification, filtering, demodulation, etc. on the received weak Doppler echo signal. Thus, the processed Doppler echo signal can be output to the acquisition chip 201, and transmitted to the back-end processing device 300 through the acquisition chip 201. The back-end processing device 300 extracts valuable information contained therein, such as the speed, distance, and other related parameter information of the projectile.

[0041] Optionally, Figure 4 is a block diagram of another initial velocity measuring device provided by the utility model, as Figure 4 indicated, the front-end acquisition device 200 further comprises a power module 206, the acquisition chip 201 comprises a power interface 1 and a signal output interface 2, the photoelectric hybrid cable 400 comprises a front-end interface 3 and a back-end interface 4, and the front-end interface 3 comprises a power end 3a and a signal end 3b.

[0042] The output end of the power module 206 is connected with the power interface 1, the input end of the power module 206 is connected with the power end 3a, the signal output interface 2 is connected with the signal end 3b, and the back-end interface 4 is connected with the back-end processing device 300.

[0043] The power module 206 can be a power box, which can supply power to the front-end acquisition device 200. The power box can input power through the photoelectric hybrid cable 400. The power box supplies power to the acquisition chip 201 through the power interface 1 to ensure power supply of the device. In addition, the signal output interface 2 of the acquisition chip 201 is communicatively connected with the back-end interface 4 of the back-end processing device 300, and is used for transmission of the Doppler echo signal.

[0044] Optionally, the front-end acquisition device 200 further comprises a power module 206, and the power module 206 is further used for supplying power to the signal transmitting unit 202, the signal receiving unit 203 and the zero-time signal triggering unit 204.

[0045] The power supply module 206 can supply power to the transmitter in the signal transmitting unit 202, supply power to the receiver in the signal receiving unit 203, and supply power to the zero-time signal triggering unit 204, so as to ensure the power supply of the front-end acquisition device 200 and the normal operation of the device.

[0046] Optionally, the front-end acquisition device 200 further comprises an antenna seat and a support frame, the antenna seat is used for fixing the antenna transmitting array and the antenna receiving array, and the support frame is used for supporting the antenna seat.

[0047] The antenna seat fixes the antenna transmitting array and the antenna receiving array, so as to ensure the stable transmission and stable reception of signals. The support frame can be a tripod, and the tripod has a leveling function, which can further ensure the stable transmission and stable reception of signals by the antenna transmitting array and the antenna receiving array.

[0048] Optionally, the back-end processing device 300 comprises a portable terminal. The portable terminal can be a ruggedized portable notebook computer. The portable terminal is installed with initial velocity measurement software, which can realize the setting of working parameters, the issuing of working commands, the display of the working state of the front-end acquisition device 200, the operation of data processing, and the display of final results on the software interface.

[0049] The portable terminal can be composed of a mainboard, a communication and control unit, a power supply, and the like, and can realize the data communication process with the front-end acquisition device 200. The ruggedized portable notebook computer can alleviate the impact force on the notebook computer during projectile launching.

[0050] Optionally, the back-end processing device 300 further comprises a communication module, and the portable terminal is in communication connection with a data platform through the communication module. The portable terminal is further connected with other terminals or servers through the communication module (such as Bluetooth, a local area network, and the like), so as to synchronize the calculated initial velocity of the projectile to other terminals (such as a mobile phone / IPAD, and the like), or a cloud server, or a more back-end operation platform, and the like, for more operators to check.

[0051] Optionally, the portable terminal comprises a data storage and a processor. The processor can analyze and process the initial velocity of the projectile based on the Doppler echo signal, and the data storage is used for storing the Doppler echo signal and the analysis result of the processor.

[0052] The data storage can be a read-only memory or a random access memory, etc.The processor can be various general-purpose and / or special-purpose processing components with processing and computing capabilities, some examples of the processor including but not limited to a central processing unit, a graphics processing unit, various special-purpose artificial intelligence computing chips, various processors running machine learning model algorithms, a digital signal processor, and any appropriate processor, controller, microcontroller, etc.The hardware can provide support for the software of the computing initial speed.

[0053] In one embodiment, before the test, according to the task test requirements, the radar station scheme is determined, the radar is deployed at the selected test point, the erection, leveling, connection, calibration, parameter setting and other preparation work are completed, and the radar enters the measured state; during the test, the radar is powered on and works, radiates the detection signal in the set airspace, the radar data acquisition equipment is in the waiting trigger state, when the projectile is launched, the infrared trigger receives the light signal to generate a trigger signal, the terminal is started to collect and receive data, after the collection is completed, the test data is stored; after the experiment is completed, the stored data is analyzed by the post-processing software, the projectile speed, time and other data are extracted, and the initial speed is obtained through processing; all original and processed data can be stored in the data processing terminal data hard disk, and can be viewed and processed after the event. In the device, only one long-distance photoelectric hybrid cable is needed between the front-end acquisition equipment and the rear-end processing equipment, so that the monitoring data and the Doppler signal can be reliably transmitted at a long distance and the front-end power supply can be realized. The rear-end processing equipment adopts a portable and rugged notebook computer, which is convenient to operate and has good anti-vibration performance, and the working state of the equipment can be observed in real time. The measuring device has high integration, reliable data transmission and strong anti-interference capability, and is convenient to deploy and withdraw.

[0054] In summary, according to the initial speed measuring device provided by the utility model, the front-end acquisition equipment and the rear-end processing equipment are included; the front-end acquisition equipment includes an acquisition chip, a signal transmitting unit, a signal receiving unit and a zero-time signal triggering unit connected with the acquisition chip, and the acquisition chip and the rear-end processing equipment are connected through a photoelectric hybrid cable; the signal transmitting unit is used for transmitting a single-frequency continuous wave signal, the signal receiving unit is used for receiving a Doppler echo signal of the single-frequency continuous wave signal, and the zero-time signal triggering unit is used for generating a trigger signal when the projectile is launched, wherein, when the trigger signal is generated, a signal path is formed between the acquisition chip and the signal receiving unit to collect the Doppler echo signal received by the signal receiving unit, and the Doppler echo signal is transmitted to the rear-end processing equipment through the photoelectric hybrid cable. Thus, the front-end and the rear-end equipment are connected through the photoelectric hybrid cable, only one photoelectric hybrid cable is needed for the front-end and the rear-end, the size and weight of the cable are greatly reduced, and the reliability of signal transmission can be ensured. The rear-end adopts a rugged portable notebook computer, has good anti-vibration performance, and corresponding software configuration is performed on the rear-end processing equipment, the operating personnel can observe the working state of the front-end in real time on the software interface, and the user experience is good.

[0055] The above detailed description does not constitute a limitation on the protection scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An initial velocity measuring device, characterized in that, include: Front-end data acquisition equipment and back-end processing equipment; The front-end acquisition device includes an acquisition chip, as well as a signal transmitting unit, a signal receiving unit, and a zero-time signal triggering unit connected to the acquisition chip. The acquisition chip is connected to the back-end processing device via a hybrid optical-electric cable. The signal transmitting unit is used to transmit a single-frequency continuous wave signal, the signal receiving unit is used to receive the Doppler echo signal of the single-frequency continuous wave signal, and the zero-time signal triggering unit is used to generate a trigger signal when the projectile is launched. When the trigger signal is generated, a signal path is formed between the acquisition chip and the signal receiving unit to collect the Doppler echo signal received by the signal receiving unit and transmit the Doppler echo signal to the back-end processing equipment through the optoelectronic hybrid cable.

2. The initial velocity measuring device according to claim 1, characterized in that, The zero-time signal triggering unit is an infrared trigger, which generates the trigger signal when it detects the flash of light emitted by the projectile.

3. The initial velocity measuring device according to claim 1, characterized in that, The acquisition chip includes a zero-time switch. One end of the zero-time switch is connected to the output terminal of the signal receiving unit, and the other end of the zero-time switch is connected to the signal collection terminal of the acquisition chip. The control terminal of the zero-time switch is connected to the output terminal of the zero-time signal triggering unit. The zero-time switch is used to be in a connected state when a trigger signal is received.

4. The initial velocity measuring device according to claim 1, characterized in that, The signal transmitting unit includes an antenna transmitting array, and the signal receiving unit includes an antenna receiving array; The antenna transmitting array includes a transmitter and a transmitting antenna. The transmitter generates the single-frequency continuous wave signal. The antenna receiving array includes a receiver and a receiving antenna. The receiver is used to receive the Doppler echo signal of the single-frequency continuous wave signal.

5. The initial velocity measuring device according to claim 1, characterized in that, The front-end acquisition device also includes a power module, the acquisition chip includes a power interface and a signal output interface, and the optoelectronic hybrid cable includes a front-end interface and a back-end interface, the front-end interface including a power end and a signal end; The output terminal of the power module is connected to the power interface, the input terminal of the power module is connected to the power terminal, the signal output interface is connected to the signal terminal, and the back-end interface is connected to the back-end processing device.

6. The initial velocity measuring device according to claim 1, characterized in that, The front-end acquisition device also includes a power module, which is used to supply power to the signal transmitting unit, the signal receiving unit and the zero-time signal triggering unit.

7. The initial velocity measuring device according to claim 4, characterized in that, The front-end acquisition device also includes an antenna mount and a support frame. The antenna mount is used to fix the antenna transmitting array and the antenna receiving array, and the support frame is used to support the antenna mount.

8. The initial velocity measuring device according to claim 1, characterized in that, The back-end processing equipment includes a portable terminal.

9. The initial velocity measuring device according to claim 8, characterized in that, The back-end processing device also includes a communication module, through which the portable terminal communicates with the data platform.

10. The initial velocity measuring device according to claim 8, characterized in that, The portable terminal includes a data storage device and a processor. The processor is capable of analyzing and processing the initial velocity of the projectile based on the Doppler echo signal. The data storage device is used to store the Doppler echo signal and the analysis results of the processor.

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