Device capable of realizing microsecond timing
By designing a timing device that integrates power conversion, data acquisition, and timing circuits, the microsecond-level timing requirement of high-speed flying projectiles was solved, realizing a simple, low-cost, and reliable microsecond-level timer suitable for long-term use in the field.
Patent Information
- Application Number
- CN202511723821.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-22
- Publication Date
- 2026-02-27
AI Technical Summary
Most existing timers are in the millisecond range, which cannot meet the microsecond-level timing requirements of high-speed projectiles, and microsecond-level timers are not suitable for long-term use in the field.
A timing device comprising a housing, a panel, a core board, and a battery was designed. The core board integrates power conversion, acquisition, and timing circuits. The acquisition module consists of voltage divider resistors and MOSFETs. Microsecond-level timing is triggered by an external signal, and the timing result is displayed using a digital tube.
It achieves microsecond-level timing accuracy, has a simple structure, low cost, and is suitable for long-term use in the field.
Smart Images
Figure CN121578616A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of timing device technology, and in particular relates to a device capable of achieving microsecond-level timing. Background Technology
[0002] A timer is a device used to measure time and has wide applications in various fields, including household life, industrial manufacturing, and sports. A certain high-speed projectile requires a microsecond-level timer to calculate its flight speed based on the flight distance. Currently, most timers on the market are millisecond-level timers, while microsecond-level timers are extremely rare, and existing microsecond-level timers cannot meet the usage scenario and requirements of this high-speed projectile.
[0003] Therefore, it is essential to design a microsecond-level timer device that meets the requirements of using a high-speed projectile. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a timer device that is easy to carry, suitable for long-term use in the field, and meets the requirements of microsecond-level measurement accuracy.
[0005] To solve the above-mentioned technical problems, the specific technical solution of the present invention is as follows: A device capable of microsecond-level timing includes a housing 1, a panel 2, a core board 3, and a battery 9. The housing 1 is a rigid housing, the panel 2 is fixed inside the housing 1, the core board 3 is fixed below the panel 2, and the battery 9 is fixed at the bottom of the housing. The core board 3 and the battery 9 are connected to the panel 2 via flexible wiring, and the panel 2 is provided with an external connection interface 5 for external signal input. The core board 3 includes a power conversion circuit, a data acquisition module, a path detection circuit, and a timing circuit. The power conversion circuit, data acquisition module, path detection circuit, and timing circuit are printed on the same circuit board, which is fixed to the housing 1 via a connecting rod 10. The power conversion circuit converts the external input voltage into the power supply voltage required by the circuit board and the reference voltage required by the data acquisition module. The data acquisition module is used to acquire external signals. The path detection circuit is connected to an indicator light to show whether an external device is connected to the external connection interface 5. The timing circuit is connected to the data acquisition module to start or stop timing based on the external signal from the data acquisition module.
[0006] The panel 2 is equipped with a power switch button 7, a reset button 6, a digital tube 4, a battery charging interface 8, an external connection interface 5, and a channel display module 11.
[0007] Furthermore, the acquisition module consists of voltage divider resistors and a MOSFET. When the circuit is open, current flows through voltage divider resistors R1 and R5 to the MOSFET, and the MOSFET control terminal is at a high threshold level, turning on the MOSFET. Voltage divider resistor R9 is connected in series between the power conversion circuit and the drain of the MOSFET, and voltage divider resistor R13 is connected in series between the source of the MOSFET and ground, reducing the reference voltage to the input voltage of the microcontroller pin. The corresponding microcontroller I / O port is set to an external trigger interrupt. When the timing starts or ends, the external circuit changes from open to closed, the MOSFET is turned off, and the corresponding microcontroller I / O port changes from high level to low level to trigger an interrupt, starting or stopping the timer.
[0008] The present invention has the following advantages: it can perform two-channel microsecond-level timing and display according to specific requirements, and has the advantages of simple structure, low cost and high reliability. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of the microsecond-level timer device of the present invention; Figure 2 This is a schematic diagram of the panel of the timer device of the present invention; Figure 3 This refers to the peripheral circuit of the core board 3 of the timer device of the present invention; Figure 4 The flowchart illustrates how this invention enables microsecond-level timing.
[0010] In the diagram: 1. Cabinet, 2. Panel, 3. Core board, 4. Digital tube, 5. External connection interface, 6. Reset button, 7. Power switch button, 8. Charging interface, 9. Rechargeable battery, 10. Connecting rod, 11. Channel display. Detailed Implementation
[0011] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.
[0012] Example 1 See Figures 1-4 This embodiment describes a device capable of implementing a microsecond-level timer. This embodiment selects STMicroelectronics' STM32F407 chip, which has a main frequency of up to 168MHz, 1MB of Flash memory and 192KB of SRAM, and supports high-speed data processing and program execution.
[0013] The timer in this embodiment has the following structure: it includes a housing 1, a panel 2, a core board 3, and a battery 9. The housing 1 is a rigid housing. The panel is located in the upper part of the housing 1 and is fixedly connected. The core board is located in the middle part of the housing 1, below the panel, and is fixedly connected. The battery is located in the lower part of the housing and is fixedly connected. The signal connection between the core board, the battery, and the panel is a flexible connection. The panel is provided with an external connection interface 5 for external trigger signal input.
[0014] The panel 2 includes a power switch button 7, a reset button 6, a digital tube 4, a battery charging interface 8, an external connection interface 5, and a channel display module 11.
[0015] The core board 3 includes a power conversion circuit, a data acquisition module and a path detection circuit, and a timing circuit. The power conversion circuit, the data acquisition module and the path detection circuit, and the timing circuit are printed on the same circuit board, which is fixedly connected to the housing 1 by a connecting rod 10.
[0016] The power conversion circuit converts the external input voltage into the supply voltage required by the chip and the reference voltage required by the acquisition module. The selected power chip has a wide input voltage range of 4.5V to 60V.
[0017] In the path detection circuit, taking a single path as an example, the current limiting resistor R17 is connected in series with LED1. When the external device under test is connected to the timer device, a path is formed, and the LED lights up as an access indicator.
[0018] The data acquisition module consists of voltage divider resistors and MOSFETs. Taking a single channel as an example, the initial circuit is open. Through voltage divider resistors R1 and R5, the MOSFET control terminal is set to a high-level threshold, and the MOSFET is turned on. Voltage divider resistor R9 is connected in series between the 5V and the drain of the MOSFET, and voltage divider resistor R13 is connected in series between the source and ground of the MOSFET, reducing the reference voltage to the input voltage of the microcontroller pin. The corresponding microcontroller I / O port is set to external trigger interrupt; when the timing starts or ends, the external circuit changes from open to closed, the MOSFET is turned off, and the corresponding microcontroller I / O port changes from high to low to trigger an interrupt, starting or stopping the timer. The digital tube 4 displays the timing time in real time, and displays the final timing time when the timing ends.
[0019] This embodiment is manufactured using existing technology. The chip, external connection interface 5, circuit board and components are all commercially available products of existing technology.
[0020] The timing method in this embodiment includes the following steps: 1) Power on the system; 2) Initialization; 3) Reset: The selected digital tube requires a hardware reset. 3) Wait for the external timer start signal to arrive; 4) Upon receiving the start signal, the microcontroller's timer starts and begins timing; 5) Upon receiving the timing end signal, the microcontroller stops timing; 6) After the event, read the final timing time using the digital display.
[0021] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art will be able to make various modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the scope of protection of the present invention.
Claims
1. A device capable of achieving microsecond-level timing, characterized in that, It includes a housing (1), a panel (2), a core board (3), and a battery (9); the housing (1) is a rigid housing, the panel (2) is fixed inside the housing (1), the core board (3) is fixed below the panel (2), and the battery (9) is fixed at the bottom of the housing; the core board (3) and the battery (9) are connected to the panel (2) by a flexible connection, and the panel (2) is provided with an external connection interface (5) for external signal input; The core board (3) includes a power conversion circuit, a data acquisition module, a path detection circuit, and a timing circuit. The power conversion circuit, data acquisition module, path detection circuit, and timing circuit are printed on the same circuit board, which is fixed to the housing (1) via a connecting rod (10). The power conversion circuit is used to convert the external input voltage into the power supply voltage required by the circuit board and the reference voltage required by the data acquisition module. The data acquisition module is used to acquire external signals. The path detection circuit is connected to an indicator light to show whether the external device is connected to the external connection interface (5). The timing circuit is connected to the data acquisition module to start or stop timing according to the external signal of the data acquisition module.
2. The device capable of microsecond-level timing according to claim 1, characterized in that, The panel (2) is equipped with a power switch button (7), a reset button (6), a digital tube (4), a battery charging interface (8), an external connection interface (5), and a channel display module (11).
3. The device capable of microsecond-level timing according to claim 1, characterized in that, The acquisition module consists of voltage divider resistors and a MOSFET. When the circuit is open, current flows through voltage divider resistors R1 and R5 to the MOSFET, and the MOSFET control terminal is at a high threshold, turning on the MOSFET. Voltage divider resistor R9 is connected in series between the power conversion circuit and the drain of the MOSFET, and voltage divider resistor R13 is connected in series between the source of the MOSFET and ground, reducing the reference voltage to the input voltage of the microcontroller pin. The corresponding microcontroller I / O port is set to an external trigger interrupt. When the timing starts or ends, the external circuit changes from open to closed, the MOSFET is turned off, and the corresponding microcontroller I / O port changes from high to low to trigger an interrupt, starting or stopping the timer.