Self-calibration timing circuit, timing device and ignition device

Abstract

The utility model discloses a self-calibration timing circuit, a timing device and an ignition device, and relates to the field of timing, the self-calibration timing circuit comprises a calibration circuit, an output end is connected with a clock end of a calibrated circuit, and the calibration circuit is used for outputting a clock signal to the calibrated circuit; the output end of the calibrated circuit is connected with the input end of the ignition device, and the calibrated circuit is used for timing based on the clock signal; and the ignition device is used for outputting detonation when the ignition signal is received through the input end of the ignition device at the end of timing. The calibration circuit and the calibrated circuit are separately arranged, the calibration circuit does not participate in actual control, the high overload circuit is prevented from influencing the timing accuracy, the calibration circuit outputs the time to the calibrated circuit, the ignition device is further controlled, and the timing can be more accurate.

Description

Technical Field

[0001] This utility model relates to the field of timing, and in particular to a self-calibrating timing circuit, a timing device, and an ignition device. Background Technology

[0002] Timing accuracy is a crucial factor affecting time-activated ignition devices. Some submunition time-activated ignition devices not only need to perform timing functions but also communication functions. Due to their high dispersion overload and power consumption limitations, they suffer from low timing accuracy, which in turn affects the destructive effect of the munition. Utility Model Content

[0003] The purpose of this invention is to provide a self-calibrating timing circuit, timing device, and ignition device. By separating the calibration circuit from the calibrated circuit, the calibration circuit does not participate in the actual control, thus avoiding the impact of high overload circuits on the accuracy of timing. The calibration circuit outputs the time to the calibrated circuit, thereby controlling the ignition device, which makes the timing more accurate.

[0004] To solve the above-mentioned technical problems, this utility model provides a self-calibrating timing circuit, comprising:

[0005] The calibration circuit has its output terminal connected to the clock terminal of the circuit being calibrated, and is used to output a clock signal to the circuit being calibrated.

[0006] The output terminal of the calibrated circuit is connected to the input terminal of the ignition device, and is used for timing based on the clock signal.

[0007] The ignition device is used to output detonation when it receives a detonation signal through its own input terminal at the end of the timer.

[0008] On the other hand, it also includes a power module, which includes a first power sub-module and a second power sub-module;

[0009] The output terminal of the first power supply submodule is connected to the power supply terminal of the calibration circuit, and the output terminal of the second power supply submodule is connected to the power supply terminal of the circuit being calibrated.

[0010] The first power supply submodule is used to step down the external voltage to supply power to the calibration circuit, and the second power supply submodule is used to step down the external voltage to supply power to the calibrated circuit.

[0011] On the other hand, the first power supply submodule includes a first TVS diode, a first filter module, a first diode, a second diode, and a first buck module;

[0012] The cathode of the first TVS diode is connected to the power supply, the anode of the first TVS diode is grounded, the first terminal of the first filter module is connected to the power supply, the second terminal of the first filter module is grounded, the anode of the first diode is connected to the power supply, the cathode of the first diode is connected to the input terminal of the first buck module, the output terminal of the first buck module is connected to the power supply terminal of the calibration circuit, the ground terminal of the first buck module is connected to the anode of the second diode, and the cathode of the second diode is grounded.

[0013] The first TVS diode, the first diode, and the second diode are used for reverse protection, and the first step-down module is used to step down the external voltage to power the calibration circuit.

[0014] On the other hand, the second power supply submodule includes a second TVS diode, a second filter module, and a second step-down module;

[0015] The anode of the second TVS diode is connected to the power supply, the cathode of the second TVS diode is connected to the first terminal of the filter module and the input terminal of the second buck module, the output terminal of the second buck module is connected to the power supply terminal of the calibrated circuit, and the ground terminal of the second buck module is connected to the second terminal of the filter module, and the common terminal of the connection is grounded.

[0016] The second TVS diode is used for reverse protection, and the second step-down module is used to step down the external voltage to power the calibrated circuit.

[0017] On the other hand, the calibration circuit includes a first capacitor, a second capacitor, a crystal oscillator, a first resistor, and a timing chip;

[0018] The first terminal of the first capacitor and the first terminal of the second capacitor are both grounded. The second terminal of the first capacitor is connected to the first terminal of the crystal oscillator, the first terminal of the first resistor, and the clock input terminal of the timing chip, respectively. The second terminal of the second capacitor is connected to the second terminal of the crystal oscillator, the second terminal of the first resistor, and the clock output terminal of the timing chip, respectively.

[0019] The crystal oscillator is used to generate a natural frequency oscillation, the first capacitor and the second capacitor are used to adjust the oscillation frequency, and the first resistor is used to provide bias current to the crystal oscillator.

[0020] On the other hand, it also includes a communication module;

[0021] The first end of the communication module is connected to the control end of the calibration circuit, and the second end of the communication module is connected to an external signal;

[0022] The communication module is used to transmit the external signal to the calibration circuit.

[0023] On the other hand, it also includes shielded cable modules;

[0024] One end of the shielded cable module is connected to the first end of the communication module, and the other end is connected to the control end of the calibration circuit.

[0025] The shielded cable module is used to shield interference signals.

[0026] To solve the above-mentioned technical problems, this utility model also provides a timing device, including the self-calibration timing circuit described above.

[0027] To solve the above-mentioned technical problems, this utility model also provides an ignition device, including the aforementioned timing device.

[0028] This application provides a self-calibrating timing circuit, a timing device, and an ignition device, relating to the field of timing. It includes a calibration circuit, the output of which is connected to the clock terminal of the circuit being calibrated, for outputting a clock signal to the calibrated circuit; the calibrated circuit, the output of which is connected to the input terminal of the ignition device, for timing based on the clock signal; and the ignition device, for outputting detonation upon receiving a detonation signal through its own input terminal at the end of the timing process. Because the calibration circuit and the circuit being calibrated are separated, the calibration circuit does not participate in actual control, avoiding the impact of high overload circuits on timing accuracy. The calibration circuit outputs the time to the calibrated circuit, thereby controlling the ignition device, resulting in more accurate timing. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of a self-calibrating timing circuit provided by this utility model;

[0031] Figure 2 A schematic diagram of the structure of a first power supply submodule provided by this utility model;

[0032] Figure 3 A schematic diagram of the structure of a second power supply submodule provided by this utility model;

[0033] Figure 4 This is a schematic diagram of a calibration circuit provided by the present invention. Detailed Implementation

[0034] The core of this utility model is to provide a self-calibrating timing circuit, a timing device, and an ignition device. By separating the calibration circuit from the calibrated circuit, the calibration circuit does not participate in the actual control, thus avoiding the impact of high overload circuits on the accuracy of timing. The calibration circuit outputs the time to the calibrated circuit, thereby controlling the ignition device, which makes the timing more accurate.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] Figure 1 This is a schematic diagram of a self-calibrating timing circuit provided by the present invention. The self-calibrating timing circuit includes:

[0037] The output terminal of calibration circuit 1 is connected to the clock terminal of the calibrated circuit 2, and is used to output a clock signal to the calibrated circuit 2.

[0038] The output of the calibrated circuit 2 is connected to the input of the ignition device 3, and is used for timing based on a clock signal;

[0039] The ignition device 3 is used to output detonation when it receives a detonation signal through its own input terminal at the end of the timer.

[0040] When the ignition device 3 for some bullets is in operation, its overload is relatively small in the initial state. When the bullet is ejected from the ignition device 3, it needs to withstand a large overload impact, so it cannot use a crystal oscillator as the oscillation source. In addition, after the bullet is ejected, the ignition device 3 does not have an external power supply, so it is difficult to use a silicon oscillator with high power consumption as the oscillation source. Therefore, RC oscillation is usually used as the oscillation source, which causes the problem of low timing accuracy.

[0041] The circuit consists of a calibration circuit 1 and a circuit to be calibrated 2. The calibration circuit 1 is composed of a calibration microcontroller, a crystal oscillator, etc., while the circuit to be calibrated 2 is a microcontroller. After the ignition device 3 is launched, the calibration circuit 1, upon power-up, immediately outputs a PWM square wave of a certain period to the circuit to be calibrated 2 via its internal timer. The circuit to be calibrated 2 detects the period of the received square wave signal and uses this period as the reference for its internal timing, thereby improving its timing accuracy.

[0042] The calibration circuit 1 uses a high-precision oscillator such as a crystal oscillator or a silicon oscillator as the oscillation source. The calibration circuit 1 outputs a periodic PWM signal with a timing accuracy that reaches the accuracy of the crystal oscillator or silicon oscillator. The timing chip used in the calibration circuit 1 can be a dedicated integrated IC or a microcontroller or other chips with timing output function. This application does not impose any restrictions here.

[0043] The microcontroller being calibrated receives the calibration signal from calibration circuit 1. The microcontroller uses a timer to detect the period value of the calibration signal and uses the detected timing value as the time reference for its timing output. The microcontroller outputs a timing signal based on the pre-set timing value and the calibrated time as the reference.

[0044] This application provides a self-calibrating timing circuit, relating to the field of timing, including a calibration circuit 1, whose output terminal is connected to the clock terminal of a calibrated circuit 2, for outputting a clock signal to the calibrated circuit 2; the calibrated circuit 2, whose output terminal is connected to the input terminal of an ignition device 3, for timing based on the clock signal; and the ignition device 3, for outputting detonation when it receives a detonation signal through its own input terminal at the end of the timing. Because the calibration circuit 1 and the calibrated circuit 2 are set up separately, the calibration circuit 1 does not participate in actual control, avoiding the impact of high overload circuits on timing accuracy. The calibration circuit 1 outputs the time to the calibrated circuit 2, thereby controlling the ignition device 3, making the timing more accurate.

[0045] Based on the above embodiments:

[0046] In some embodiments, a power module is also included, which includes a first power submodule and a second power submodule.

[0047] The output terminal of the first power supply submodule is connected to the power supply terminal of the calibration circuit 1, and the output terminal of the second power supply submodule is connected to the power supply terminal of the circuit being calibrated.

[0048] The first power supply submodule is used to step down the external voltage to power the calibration circuit 1, and the second power supply submodule is used to step down the external voltage to power the calibrated circuit 2.

[0049] Power supply module such as Figure 2 and Figure 3 The circuit is powered by an external 5V supply. After passing through a TVS diode for protection, the voltage is filtered and stored, and then stepped down to 3.3V to power the calibration circuit 1, the communication module, and the calibrated circuit 2.

[0050] To improve anti-interference capability, two unit sub-modules are used to power the calibration circuit 1 and the calibrated circuit respectively.

[0051] In some embodiments, the first power supply submodule includes a first TVS diode U5, a first filter module, a first diode D1, a second diode D2, and a first step-down module U1;

[0052] The cathode of the first TVS diode U5 is connected to the power supply, the anode of the first TVS diode U5 is grounded, the first end of the first filter module is connected to the power supply, the second end of the first filter module is grounded, the anode of the first diode D1 is connected to the power supply, the cathode of the first diode D1 is connected to the input terminal of the first buck module U1, the output terminal of the first buck module U1 is connected to the power supply terminal of the calibration circuit 1, the ground terminal of the first buck module U1 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is grounded.

[0053] The first TVS diode U5, the first diode D1, and the second diode D2 are used for reverse protection, and the first step-down module U1 is used to step down the external voltage to power the calibration circuit 1.

[0054] The filtering module can be implemented using multiple capacitors connected in parallel, or it can achieve energy storage function through a single capacitor with a large capacitance value. The first step-down module U1 reduces the 5V voltage to 3.3V. To prevent current backflow, two diodes are used; the first diode D1 and the second diode D2 respectively provide reverse protection.

[0055] In some embodiments, the second power supply submodule includes a second TVS diode D4, a second filter module, and a second step-down module U8;

[0056] The anode of the second TVS diode D4 is connected to the power supply. The cathode of the second TVS diode D4 is connected to the first terminal of the filter module and the input terminal of the second step-down module U8, respectively. The output terminal of the second step-down module U8 is connected to the power supply terminal of the circuit being calibrated. The ground terminal of the second step-down module U8 is connected to the second terminal of the filter module, and the common terminal of the connection is grounded.

[0057] The second TVS diode D4 is used for reverse protection, and the second step-down module U8 is used to step down the external voltage to power the calibrated circuit 2.

[0058] The filtering module can be implemented using multiple capacitors connected in parallel, or it can achieve energy storage function through a single capacitor with a large capacitance value. The second step-down module U8 reduces the 5V voltage to 3.3V.

[0059] Figure 4 A schematic diagram of the structure of a calibration circuit provided by this utility model;

[0060] In some embodiments, the calibration circuit 1 includes a first capacitor C1, a second capacitor C2, a crystal oscillator X1, a first resistor R1, and a timing chip;

[0061] The first terminal of the first capacitor C1 and the first terminal of the second capacitor C2 are both grounded. The second terminal of the first capacitor C1 is connected to the first terminal of the crystal oscillator X1, the first terminal of the first resistor R1 and the clock input terminal of the timing chip, respectively. The second terminal of the second capacitor C2 is connected to the second terminal of the crystal oscillator X1, the second terminal of the first resistor R1 and the clock output terminal of the timing chip, respectively.

[0062] Crystal X1 is used to generate a natural frequency oscillation, first capacitor C1 and second capacitor C2 are used to adjust the oscillation frequency, and first resistor R1 is used to provide bias current to crystal X1.

[0063] Calibration circuit 1 receives the setpoint from the external controller and forwards it to the calibrated circuit 2 for time calibration and other tasks. The microcontroller uses an 8MHz external crystal oscillator X1. The microcontroller model is GD32F103C8T6, operating at 3.3V. It is a 32-bit general-purpose microcontroller based on an ARM core, achieving an optimal balance in processing power, power consumption reduction, and peripheral configuration. The circuit consists of the external crystal oscillator X1 circuit (C1, C2, X1, R1) and the microcontroller's peripheral circuitry. All pins in this circuit are not pulled up to prevent unexpected microcontroller malfunctions.

[0064] The calibration circuit 2 receives the set value and calibration value from the host calibration circuit 1 module, and outputs the detonation signal when the timer expires. The microcontroller is model HC32L110C6PA, with an operating voltage of 1.8V~5.5V. There is no external crystal oscillator X1 in the circuit; the internal high-speed crystal oscillator X14 / 8 / 16 / 22.12 / 24MHz is used, controlled by the microcontroller and its peripheral circuitry. Not all pins in this circuit are pull-up, ensuring the microcontroller will not malfunction unexpectedly.

[0065] In some embodiments, a communication module is also included;

[0066] The first end of the communication module is connected to the control end of the calibration circuit 1, and the second end of the communication module is connected to an external signal.

[0067] The communication module is used to transmit external signals to calibration circuit 1.

[0068] The communication module performs external communication using the 422 communication method, and sets the installation time of the host calibration circuit 1 module according to the external controller.

[0069] In some embodiments, a shielded cable module is also included;

[0070] One end of the shielded cable module is connected to the first end of the communication module, and the other end is connected to the control end of the calibration circuit 1;

[0071] Shielded cable modules are used to shield interference signals.

[0072] Communicating with an external controller uses a custom-made cable. The cable is grounded and shielded, and the cable ends have filters and common-mode inductors to prevent high-frequency and low-frequency interference signals. It also features high-voltage-resistant TVS diodes and multiple protection measures to prevent electrostatic interference.

[0073] An external controller provides power, and the power module steps down the 5V to 3.3V, supplying power to calibration circuit 1, the communication module, and the calibrated circuit 2. After power-on, calibration circuit 1 continuously outputs pulses with periods of 10ms, 1ms, and 0.1ms, and a 50% duty cycle to the slave device via its I / O port for at least 1 second. These pulses are then sent to the calibrated circuit 2 via pin (PA5). The calibrated circuit 2 receives the calibration signal and records its period T using a timer. When the ignition device experiences high overload during launch, the external controller sets a timer for calibration circuit 1 via the communication module. Calibration circuit 1 then relays this timer to the calibrated circuit 2 before powering off. After power-off, calibration circuit 1 ceases operation. The calibrated circuit 2 has acquired the calibration signal and the set timer. After launch, it begins timing, using the recorded T as the time reference. Upon the timer expires, it outputs an initiation signal, and the ignition device 3 initiates the initiation.

[0074] This application also provides a timing device, including the self-calibrating timing circuit described above.

[0075] The timing device provided in this application is described in the above embodiments and will not be repeated here.

[0076] This application also provides an ignition device, including the aforementioned timing device.

[0077] Please refer to the above embodiments for a description of the ignition device provided in this application, and it will not be repeated here.

[0078] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes said element.

[0079] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can implement the described functions in different ways for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0080] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-calibrating timing circuit, characterized in that, include: The calibration circuit has its output terminal connected to the clock terminal of the circuit being calibrated, and is used to output a clock signal to the circuit being calibrated. The output terminal of the calibrated circuit is connected to the input terminal of the ignition device, and is used for timing based on the clock signal. The ignition device is used to output detonation when it receives a detonation signal through its own input terminal at the end of the timer.

2. The self-calibrating timing circuit as described in claim 1, characterized in that, It also includes a power module, which includes a first power submodule and a second power submodule; The output terminal of the first power supply submodule is connected to the power supply terminal of the calibration circuit, and the output terminal of the second power supply submodule is connected to the power supply terminal of the circuit being calibrated. The first power supply submodule is used to step down the external voltage to supply power to the calibration circuit, and the second power supply submodule is used to step down the external voltage to supply power to the calibrated circuit.

3. The self-calibrating timing circuit as described in claim 2, characterized in that, The first power supply submodule includes a first TVS diode, a first filter module, a first diode, a second diode, and a first buck module; The cathode of the first TVS diode is connected to the power supply, the anode of the first TVS diode is grounded, the first terminal of the first filter module is connected to the power supply, the second terminal of the first filter module is grounded, the anode of the first diode is connected to the power supply, the cathode of the first diode is connected to the input terminal of the first buck module, the output terminal of the first buck module is connected to the power supply terminal of the calibration circuit, the ground terminal of the first buck module is connected to the anode of the second diode, and the cathode of the second diode is grounded. The first TVS diode, the first diode, and the second diode are used for reverse protection, and the first step-down module is used to step down the external voltage to power the calibration circuit.

4. The self-calibrating timing circuit as described in claim 2, characterized in that, The second power supply submodule includes a second TVS diode, a second filter module, and a second step-down module; The anode of the second TVS diode is connected to the power supply, the cathode of the second TVS diode is connected to the first terminal of the filter module and the input terminal of the second buck module, the output terminal of the second buck module is connected to the power supply terminal of the calibrated circuit, and the ground terminal of the second buck module is connected to the second terminal of the filter module, and the common terminal of the connection is grounded. The second TVS diode is used for reverse protection, and the second step-down module is used to step down the external voltage to power the calibrated circuit.

5. The self-calibrating timing circuit as described in claim 1, characterized in that, The calibration circuit includes a first capacitor, a second capacitor, a crystal oscillator, a first resistor, and a timing chip; The first terminal of the first capacitor and the first terminal of the second capacitor are both grounded. The second terminal of the first capacitor is connected to the first terminal of the crystal oscillator, the first terminal of the first resistor, and the clock input terminal of the timing chip, respectively. The second terminal of the second capacitor is connected to the second terminal of the crystal oscillator, the second terminal of the first resistor, and the clock output terminal of the timing chip, respectively. The crystal oscillator is used to generate a natural frequency oscillation, the first capacitor and the second capacitor are used to adjust the oscillation frequency, and the first resistor is used to provide bias current to the crystal oscillator.

6. The self-calibrating timing circuit as described in any one of claims 1 to 5, characterized in that, It also includes a communication module; The first end of the communication module is connected to the control end of the calibration circuit, and the second end of the communication module is connected to an external signal; The communication module is used to transmit the external signal to the calibration circuit.

7. The self-calibrating timing circuit as described in claim 6, characterized in that, It also includes a shielded cable module; One end of the shielded cable module is connected to the first end of the communication module, and the other end is connected to the control end of the calibration circuit. The shielded cable module is used to shield interference signals.

8. A timing device, characterized in that, Includes the self-calibrating timing circuit as described in any one of claims 1 to 7.

9. An ignition device, characterized in that, Includes the timing device as described in claim 8.

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