阅读说明：本技术 一种用于外弹道数据采集的抗过载供电模块 (Overload-resistant power supply module for data acquisition of outer missile way ) 是由 吴志强 朱立华 王宇 杨帆 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种用于外弹道数据采集的抗过载供电模块,其特征在于,包括供电电路、机械开关电路、加速度计开关电路、或门、继电器、DC-DC电路；供电电路用于在过载状态下输出稳定电压,为机械开关电路、加速度计开关电路、或门、继电器供电；机械开关电路,用于在过载条件下通过切断导线的方式触发RC延时电路,延时过后输出；加速度计开关电路,用于在过载条件下以输出脉冲的方式触发RC延时电路,延时过后输出电压；或门的两个输入端分别连接机械开关电路和开关电路的输出端；或门输出端接触发继电器；所述DC-DC电路,用于将继电器输出的电压升压,为位姿测量系统提供所需的电压；本发明可保证供电系统电压稳定。(The invention discloses an overload-resistant power supply module for acquiring external ballistic data, which is characterized by comprising a power supply circuit, a mechanical switch circuit, an accelerometer switch circuit, an OR gate, a relay and a DC-DC circuit, wherein the power supply circuit is connected with the accelerometer switch circuit; the power supply circuit is used for outputting stable voltage in an overload state and supplying power to the mechanical switch circuit, the accelerometer switch circuit, the OR gate and the relay; the mechanical switch circuit is used for triggering the RC delay circuit in a mode of cutting off the lead under the overload condition, and outputting the RC delay circuit after the RC delay circuit is delayed; the accelerometer switch circuit is used for triggering the RC delay circuit in a pulse output mode under an overload condition and outputting voltage after delay; two input ends of the OR gate are respectively connected with the mechanical switch circuit and the output end of the switch circuit; the output end of the OR gate is connected with a trigger relay; the DC-DC circuit is used for boosting the voltage output by the relay and providing the required voltage for the pose measuring system; the invention can ensure the voltage stability of the power supply system.)

1. An overload-resistant power supply module for external ballistic data acquisition is characterized by comprising a power supply circuit, a mechanical switch circuit, an accelerometer switch circuit, an OR gate, a relay and a DC-DC circuit;

the power supply circuit is used for outputting stable voltage in an overload state and supplying power to the mechanical switch circuit, the accelerometer switch circuit, the OR gate and the relay;

the mechanical switch circuit is used for triggering the RC delay circuit in a mode of cutting off a lead under an overload condition, and outputting the RC delay circuit after delay;

the accelerometer switch circuit is used for triggering the RC delay circuit in a pulse output mode under an overload condition and outputting the RC delay circuit after delay;

two input ends of the OR gate are respectively connected with the mechanical switch circuit and the output end of the switch circuit; the output end of the OR gate is connected with a trigger relay; when any input end of the OR gate is at a high level, the trigger relay is closed, so that the relay outputs the required voltage;

and the DC-DC circuit is used for boosting the voltage output by the relay, providing the required voltage for the pose measuring system and using the voltage as a power supply signal of the pose measuring system.

2. The power supply module of claim 1, wherein the power supply circuit comprises a first lithium battery LI1, a second lithium battery LI2, a capacitor C1, a resistor R1;

the first lithium battery LI1 is connected with the first Schottky diode D1 in series, the second lithium battery LI2 is connected with the second Schottky diode D2 in series, and the capacitor C1 is connected with a circuit formed by connecting the resistor R1 and the third Schottky diode D3 in parallel; the three circuits connected in series are connected in parallel.

3. The power supply module of claim 1 wherein said mechanical switching circuit comprises an RC delay circuit, a schmitt trigger U5 and an edge trigger U3 with set and reset functions, a mechanical switch; the RC delay circuit comprises a resistor R15 and a capacitor C10 which are connected in series;

one end of the resistor R15 is connected with a power supply circuit, the capacitor C10 is short-circuited by one lead in the initial state, and the lead passes through the mechanical switch when being connected; the mechanical switch is used for cutting off the lead under an overload condition, so that the capacitor C10 enters a charging state; the positive electrode signal of the capacitor C10 is used as the input signal of the Schmitt trigger U5 and is connected to the input port A of the Schmitt trigger U5, the output end Y of the Schmitt trigger U5 is connected to the clock input end CLK of the edge trigger U3 through the resistor R17, and the output port Q of the edge trigger U3 outputs the output signal of the whole mechanical switch circuit.

4. The power supply module of claim 1, wherein the output voltages of the first lithium battery LI1 and the second lithium battery LI2 are both 3.7V; the capacitor C1 is a 5F capacitor.

5. A power supply module according to claim 1, characterized in that the mechanical switch comprises a mass (11), a spring (12), a guide cylinder (13), a shear pin (14), a shutter (16); the mass block (11), the spring (12), the shearing pin (14) and the baffle plate (16) are all arranged in the guide cylinder (13); one end of the shear pin (14) is fixed with the mass block (11), and the other end of the shear pin penetrates through the baffle plate (16); the baffle (16) is fixed with the guide cylinder (13); the spring (12) is arranged between the mass (11) and the baffle (16) and is in a pre-compression state; the lead wire passes through the mouth of the guide cylinder (13).

6. The power supply module of claim 1, wherein the switching circuit comprises an accelerometer module, a jack J2, an RC delay circuit, a schmitt trigger U7, an edge trigger U6 with set and reset functions; the RC delay circuit comprises a resistor R21 and a capacitor C13;

the accelerometer module is connected with a power supply circuit through a first port (1) of a socket J2, is grounded through a second port (2), is connected with a clock input end CLK of an edge trigger U6 through a resistor R32 through a third port (3), an output end Q of the edge trigger U6 is connected with an input end of a Schmitt trigger U7 through a resistor R21, and a capacitor C13 is connected between the resistor R21 and the Schmitt trigger U7; the output terminal Y of the schmitt trigger U7 is used as the output signal of the entire accelerometer switching circuit.

7. The power supply module of claim 3 or 6, wherein the delay time T of the RC delay circuit can delay system power-on by adjusting the sizes of the resistor R15 and the capacitor C10.

8. The power supply module of claim 7, wherein the delay time T is:

VCC provides voltage for the power supply circuit, Vout is the voltage across capacitor C10, and R, C is the value of the resistor and capacitor in the corresponding circuit, respectively.

Technical Field

The invention belongs to the technical field of power systems, and particularly relates to an overload-resistant power supply module for acquiring outer ballistic data.

Background

The intelligent ammunition resolves self attitude and position information by acquiring sensor data such as angular velocity and acceleration of the intelligent ammunition, and sends the attitude and position information to the control system to realize functions of range extension, accurate striking and the like. In the development and test stage, a measurement system is required to collect the data of the outer ballistic sensor of the intelligent ammunition.

The MEMS inertial sensor is a core component of the measuring system, the measuring system is electrified to work under the overload condition generated by intelligent ammunition launching, and the structure of the MEMS inertial sensor in the measuring system is damaged, so that the measuring system cannot accurately acquire the outer ballistic data. On the other hand, the MEMS inertial sensor is in a locked state before power-on operation, in which state the MEMS inertial sensor can withstand very high overload impacts. Therefore, the pose measurement system with the MEMS inertial sensor needs to be electrified to work after the cannonball is taken out of the bore. Therefore, it is necessary to design an overload-resistant non-contact power supply module for supplying power to the measurement system after the gun is ejected from the chamber. In addition, live ammunition experiment cost of intelligent ammunition is higher, and the reliability of the power supply module needs to be improved. Since the lithium battery may be pulled down in a short time due to overload impact, a circuit is required to be designed to ensure that the power supply voltage is always stable.

Disclosure of Invention

The invention aims to provide an overload-resistant power supply module for acquiring data of an outer ammunition channel, which aims to solve the problem that internal devices of a measuring system are damaged under overload impact when intelligent ammunition is launched and ensure the voltage stability of a power supply system.

The technical solution for realizing the purpose of the invention is as follows:

an overload-resistant power supply module for external ballistic data acquisition comprises a power supply circuit, a mechanical switch circuit, an accelerometer switch circuit, an OR gate, a relay and a DC-DC circuit;

the power supply circuit is used for outputting stable voltage in an overload state and supplying power to the mechanical switch circuit, the accelerometer switch circuit, the OR gate and the relay;

the mechanical switch circuit is used for triggering the RC delay circuit in a mode of cutting off a lead under an overload condition, and outputting the RC delay circuit after delay;

the accelerometer switch circuit is used for triggering the RC delay circuit in a mode that the accelerometer module outputs pulses under an overload condition, and outputting after delay;

two input ends of the OR gate are respectively connected with the mechanical switch circuit and the output end of the switch circuit; the output end of the OR gate is connected with a trigger relay; when any input end of the OR gate is at a high level, the trigger relay is closed, so that the relay outputs the required voltage;

and the DC-DC circuit is used for boosting the voltage output by the relay, providing the required voltage for the pose measuring system and using the voltage as a power supply signal of the pose measuring system.

Compared with the prior art, the invention has the following remarkable advantages:

(1) through the overload trigger switch circuit when intelligent ammunition is launched, the power module supplies power to the outside after the intelligent ammunition is discharged.

(2) The reliability of triggering is improved by using two switch modes, namely an accelerometer switch and a mechanical switch.

(3) The output of the power supply voltage is stable under the overload condition by the mode that the lithium battery is connected with the capacitor in parallel.

Drawings

Fig. 1 is a schematic block diagram of a power supply module.

Fig. 2 is a schematic diagram of a power supply circuit.

Fig. 3 is a schematic diagram of a mechanical switch.

Fig. 4 is a schematic structural diagram of the mechanical switch.

Figure 5 is a schematic diagram of an accelerometer switch.

Fig. 6 is a schematic diagram of a two-switch triggered relay.

Fig. 7 is a schematic diagram of a DC-DC circuit.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

With reference to fig. 1, an overload protection power supply module for external ballistic data acquisition according to the present invention includes a power supply circuit, a mechanical switch circuit, an accelerometer switch circuit, an or gate, a relay, and a DC-DC circuit;

the power supply circuit is used for outputting stable voltage in an overload state and supplying power to the mechanical switch circuit, the accelerometer switch circuit, the OR gate and the relay.

The mechanical switch circuit is used for triggering the RC delay circuit in a mode of cutting off the lead under the overload condition, and outputting 3.7V voltage after delay.

The accelerometer switching circuit is used for triggering the RC delay circuit in a pulse output mode under the overload condition, and the RC delay circuit outputs 3.7V voltage after delay.

Two input ends of the OR gate are respectively connected with the mechanical switch circuit and the output end of the switch circuit; the output end of the OR gate is connected with the trigger relay. When any input end of the OR gate is at a high level, the relay is triggered to be closed, so that the relay outputs 3.7V voltage.

And the DC-DC circuit is used for boosting the 3.7V voltage output by the relay, providing the required 6V voltage for the pose measurement system and taking the voltage as a power supply signal of the pose measurement system.

Further, with reference to fig. 2, the power supply circuit includes a first lithium battery LI1, a second lithium battery LI2, a capacitor C1, and a resistor R1; the first lithium battery LI1 is connected with the first Schottky diode D1 in series, the second lithium battery LI2 is connected with the second Schottky diode D2 in series, and the capacitor C1 is connected with a circuit formed by connecting the resistor R1 and the third Schottky diode D3 in parallel; the three circuits connected in series are connected in parallel; the first lithium battery LI1 and the second lithium battery LI2 supply power to a subsequent circuit after being subjected to voltage reduction through the first Schottky diode D1 and the second Schottky diode D2 respectively, and the first Schottky diode D1 and the second Schottky diode D2 guarantee that when any one of the first Schottky diode D1 and the second Schottky diode D2 breaks down, the other battery supplies power to the subsequent circuit, so that the reliability of the power supply module is improved. The resistor R1 is connected in parallel with the third Schottky diode D3 and then connected in series with the capacitor C1; when the voltage of the lithium battery is pulled down due to overload, the capacitor can supply power for a subsequent circuit in a short time through the third Schottky diode D3. The capacitor can be ensured to be capable of maintaining the output voltage to be stable in a capacitor discharge mode within the short time when the voltage of the lithium battery is pulled down by overload.

The output voltages of the first lithium battery LI1 and the second lithium battery LI2 are both 3.7V; the capacitor C1 is a 5F capacitor.

Further, in conjunction with fig. 3, the mechanical switch circuit includes an RC delay circuit, a schmitt trigger U5, an edge trigger U3 with a set and reset function, and a mechanical switch; the RC delay circuit comprises a resistor R15 and a capacitor C10 which are connected in series;

one end of the resistor R15 is connected with a power supply circuit, the capacitor C10 is short-circuited by one lead 15 in the initial state, and the lead 15 passes through the mechanical switch when being connected; the mechanical switch is used for cutting off the lead 15 under an overload condition to enable the capacitor C10 to enter a charging state; the positive electrode signal of the capacitor C10 is used as the input signal of the schmitt trigger U5 and is connected to the input port a of the schmitt trigger U5, the output end Y of the schmitt trigger U5 is connected to the clock input end CLK of the edge trigger U3 through the resistor R17, the output port Q of the edge trigger U3 outputs the output signal of the whole mechanical switch circuit, and the rest of the circuit in fig. 3 is used as the peripheral circuit of the chip and can refer to a chip data manual. SW1 in fig. 3 represents a simple switch formed by a shear pin cutting a wire of a mechanical switch.

Further, referring to fig. 4, the mechanical switch includes a mass 11, a spring 12, a guide cylinder 13, a shear pin 14, and a baffle 16; the mass block 11, the spring 12, the shear pin 14 and the baffle 16 are all arranged in the guide cylinder 13; one end of the shear pin 14 is fixed with the mass block 11, and the other end of the shear pin penetrates through the baffle 16; the baffle 16 is fixed with the guide cylinder 13; the spring 12 is arranged between the mass 11 and the baffle 16, in a pre-compressed state; a lead 15 penetrates through the opening of the guide cylinder 13; when in an overload condition, the mass 11 slides along the guide cylinder 13, the spring 12 is compressed and the shear pin 14 cuts the wire 15.

Further, in conjunction with fig. 5, the switch circuit includes an accelerometer module, a socket J2, an RC delay circuit, a schmitt trigger U7, an edge trigger U6 with set and reset functions; the RC delay circuit comprises a resistor R21 and a capacitor C13;

a port 1 of the socket J2 is connected with a power supply circuit and used for supplying power to the accelerometer module, the accelerometer module is grounded through a port 2 of the socket J2, the accelerometer module is connected with a clock input end CLK of an edge trigger U6 through a port 3 of a socket J2 in series with a resistor R32, an output end Q of the edge trigger U6 is connected with an input end of a Schmidt trigger U7 through a resistor R21, and a capacitor C13 is connected between the resistor R21 and the Schmidt trigger U7; the output terminal Y of the schmitt trigger U7 is used as the output signal of the entire accelerometer switching circuit. The accelerometer module receives a pulse signal overstange generated by an overload, and the pulse signal overstange is input into a clock input end CLK of an edge flip-flop U6 through a resistor R32 through a port 3 of a socket J2. The rest of fig. 5 is used as a peripheral circuit of the chip, and the chip data manual can be referred to.

Further, IN connection with FIG. 5, the output of the OR gate is connected to the IN + terminal, IN-ground, of relay LS 1. An output terminal LOAD1 of the relay LS1 is connected to a 3.7V power supply, and another output terminal LOAD2(Vsupply) is used as a DC-DC circuit input.

Referring to fig. 6, the DC-DC circuit can be referred to a chip data manual, except that the resistor R24 is selected by itself to control the amplification factor of the DC-DC circuit. And the voltage signal output by the DC-DC circuit is used as a power supply signal of the pose measuring system.

The working principle of the invention is as follows:

initially the capacitor C10 is shorted by a copper wire 15, the copper wire 15 passing through a mechanical switch with shear pin 14. The input terminal a of the schmitt trigger U5 is grounded by a short-circuit wire (copper wire), and the input voltage is 0 and the voltage at the output terminal Y is also 0. The input signal of the edge trigger U3 with the set and reset functions is connected to a power supply through a resistor R14, the in-phase output end Q of the edge trigger U3 with the set and reset functions is reset in an initial state, and the output is 0 at the moment. When overload occurs, the mass 11 of the shear pin 14 of the mechanical switch compresses the spring 12 under the action of the firing overload in the bore, the shear pin 14 moves downwards to shear the copper wire 15, and the mechanical switch is triggered. At this time, the capacitor C10 and the resistor R15 form a delay circuit, and the power supply charges the capacitor C10 through the resistor R15. When the voltage across the capacitor C10 reaches 2V, the input signal of the flip-flop U5 changes from low to high, and the output signal also changes from low to high. The signal is input to a clock signal input end CLK of an edge trigger U3 with the set and reset functions, at the moment, the edge trigger U3 receives a clock rising edge, and a non-inverting output end Q of an edge trigger U3 with the set and reset functions outputs a 3.7V voltage signal. The system power-on can be delayed by adjusting the sizes of the resistor R15 and the capacitor C10, and the calculation formula is as formula 1, where T is the delay time, VCC provides the voltage for the power supply circuit, here, 3.7V, Vout is the voltage value at two ends of the capacitor C10, here, 2V, and in the formula R, C, R15 and C10 in the circuit diagram are respectively.

Accelerometer switching principle: referring to fig. 6, the edge flip-flop U6 with set and reset functions is reset in the initial state, the output Q is 0, and the input D is connected to the 3.7V power supply through the resistor R20. In the initial state, the input end a and the output end Y of the schmitt trigger U7 are both 0. The port 3 of the socket J2 inputs a short pulse signal at the moment of cannonball discharging, the pulse signal flows to the clock input end CLK of the edge trigger U6 with the setting and resetting functions, at the moment, the edge trigger U6 with the setting and resetting functions experiences a clock rising edge, and the voltage of the output end Q changes from low to high. The voltage signal output by the output end Q of the edge trigger U6 with the set and reset functions is used as the input signal of the RC delay circuit, when the input signal changes from low to high, the capacitor C13 is charged through the resistor R21, and the calculation method is the same as that of the RC delay circuit in the mechanical switch circuit. When the voltage across the capacitor C13 reaches 2V, the input terminal a of the schmitt trigger U7 changes from low level to high level, and the output terminal Y also changes from low level to high level.

The output signals of the two switching circuits are used as input signals of an OR gate with two input ends, when any one of the input signals is at a high level, the OR gate outputs the high level, the relay is triggered to be closed, and the output end LOAD2(Vsupply) outputs 3.7V voltage. The voltage signal serves as an input signal for the DC-DC circuit.

Fig. 7 is a schematic diagram of a DC-DC circuit. The DC-DC circuit part is responsible for converting the 3.7V supply voltage to a 6V voltage. The output voltage is given by equation (2) and the R24 selection is given by equation (3). Where Vout is the DC-DC circuit output voltage, here 6V; vd is the diode drop, here 0.7V; a is the voltage gain, here 1.235.

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