阅读说明：本技术 基于rc延时的起爆控制系统及控制方法 (Detonation control system and control method based on RC time delay ) 是由 闫思锐 张萌 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种基于RC延时的起爆控制系统,它的电源转换芯片的电源输入端连接第一电源,电阻R1的一端连接第一电源,电容C1的一端连接电阻R1的另一端,电容C1的另一端接地,稳压二极管的负极连接电阻R1的另一端,稳压二极管的正极连接电源转换芯片的使能控制端,电阻R2的一端连接稳压二极管的正极,电阻R2的另一端接地,电源转换芯片的电源输出端连接场效应管的栅极,电源转换芯片的输出电压检测端连接电源输出端,场效应管的源极接地,场效应管的漏极连接阶跃电平起爆模块的输入端。本方案中使用电源转化芯片转化成固定电压的方式来启动场效应管,从而达到产生瞬变电平的效果。(The invention discloses an initiation control system based on RC time delay, wherein a power input end of a power supply conversion chip of the system is connected with a first power supply, one end of a resistor R1 is connected with the first power supply, one end of a capacitor C1 is connected with the other end of a resistor R1, the other end of the capacitor C1 is grounded, the cathode of a voltage stabilizing diode is connected with the other end of the resistor R1, the anode of the voltage stabilizing diode is connected with an enabling control end of the power supply conversion chip, one end of a resistor R2 is connected with the anode of the voltage stabilizing diode, the other end of a resistor R2 is grounded, the power output end of the power supply conversion chip is connected with the grid of a field effect tube, the output voltage detection end of the power supply conversion chip is connected with the power output end, the source electrode of the field effect. In the scheme, the field effect transistor is started by converting the power conversion chip into the fixed voltage, so that the effect of generating transient level is achieved.)

1. A detonation control system based on RC time delay is characterized in that: the ignition circuit comprises an RC module (1), a voltage stabilizing module (2), a power supply conversion chip (3), a field effect transistor (4) and a step level detonation module (5), wherein the RC module (1) comprises a resistor R1 and a capacitor C1, the voltage stabilizing module (2) comprises a voltage stabilizing diode V1 and a resistor R2, the power supply input end of the power supply conversion chip (3) is connected with a first power supply (6), one end of the resistor R1 is connected with the first power supply (6), one end of the capacitor C1 is connected with the other end of a resistor R1, the other end of the capacitor C1 is grounded GND, the cathode of the voltage stabilizing diode V1 is connected with the other end of a resistor R1, the anode of the voltage stabilizing diode V1 is connected with the enabling control end of the power supply conversion chip (3), one end of the resistor R2 is connected with the anode of the voltage stabilizing diode V1, the other end of the resistor R2 is grounded GND, the power supply output end, the output voltage detection end of the power conversion chip (3) is connected with the power output end, the source electrode of the field effect tube (4) is grounded GND, and the drain electrode of the field effect tube (4) is connected with the input end of the step level detonation module (5).

2. The RC delay based detonation control system of claim 1, wherein: the step level detonation module (5) comprises a capacitor C3 and a resistor R3, one end of the capacitor C3 and one end of the resistor R3 are both connected with the drain electrode of the field effect transistor (4), and the other end of the capacitor C3 and the other end of the resistor R3 are both connected with a second power supply (7).

3. The RC delay based detonation control system of claim 2, wherein: the first power supply (6) is a 12V power supply, and the second power supply (7) is a 5V power supply.

4. The RC delay based detonation control system of claim 1, wherein: and the grounding ends of the power conversion chips (3) are all grounded to GND.

5. The RC delay based detonation control system of claim 1, wherein: the resistance value of the resistor R1 is 15K omega, and the capacitance value of the capacitor C1 is 15 uF.

6. The RC delay based detonation control system of claim 1, wherein: the resistance value of the resistor R2 is 1K omega.

7. The RC delay based detonation control system of claim 2, wherein: the resistance value of the resistor R3 is 11K omega, and the capacitance value of the capacitor C3 is 0.1 uF.

8. A method of detonation control in a system according to claim 1, characterised in that it comprises the steps of:

step 1: the power supply input end IN of the power supply conversion chip (3) is supplied with power through the first power supply (6), and 3.3V voltage is output through the power supply output end OUT of the power supply conversion chip (3), wherein the enabling control end SHDN of the power supply conversion chip (3) is grounded IN an initial state, and the RC module (1) is charged through the voltage of the first power supply (6);

step 2: the initial state of the starting voltage of the enable control end SHDN of the power conversion chip (3) is grounded, so that the output end of the RC module (1) cannot be directly connected to the enable control end SHDN of the power conversion chip (3), the output end of the RC module (1) is connected with the zener diode V1, the output end of the zener diode V1 is grounded through the resistor R2, the current passing through the zener diode V1 is increased through the resistor R2, the voltage difference between the two ends of the zener diode V1 is increased, the voltage between the two ends of the zener diode V1 is rapidly stabilized at 4.7V, and the voltage of the enable control end SHDN of the power conversion chip (3) is increased.

And step 3: the voltage rise of the output end of the power conversion chip (3) has a voltage rise steep slope within ms time, the starting voltage of the field effect transistor (4) is 2-2.4V, the ms-level rise process of the voltage of the power output end OUT end of the power conversion chip (3) can pass through the starting voltage interval of the field effect transistor (4) within 1-3 ms, the power output end OUT end voltage rise time of the power conversion chip (3) is overlapped with the starting time of the field effect transistor (4), and finally the starting time of the drain electrode and the source electrode of the field effect transistor (4) can be reduced to us level to reach the condition of generating transient level.

Technical Field

The invention relates to the technical field of circuit design, in particular to a detonation control system and a detonation control method based on RC time delay.

Background

The initiating explosive device must be detonated by voltage transient without allowing a long time gradual voltage change process, so that the semi-starting state of the components is very dangerous.

One of the key technologies of the delay detonation control circuit is the generation of a microsecond step level. The delay circuit has a plurality of delay generation methods, such as delay by using a CPLD chip, programming delay of a singlechip, delay of a 555 timer and the like. At present, a plurality of chips cannot be manufactured in a home-made mode, and in addition, the packaging forms of the chips are ceramic packaging or metal packaging, so that the chips cannot be applied to severe environments such as impact resistance, high overload and the like.

Disclosure of Invention

The invention provides a detonation control system and a detonation control method based on RC time delay.

In order to achieve the purpose, the initiation control system based on RC delay comprises an RC module, a voltage stabilizing module, a power supply conversion chip, a field effect transistor and a step level initiation module, wherein the RC module comprises a resistor R1 and a capacitor C1, the voltage stabilizing module comprises a voltage stabilizing diode V1 and a resistor R2, the power supply input end of the power supply conversion chip is connected with a first power supply, one end of the resistor R1 is connected with the first power supply, one end of the capacitor C1 is connected with the other end of the resistor R1, the other end of the capacitor C1 is grounded GND, the cathode of the voltage stabilizing diode V1 is connected with the other end of the resistor R1, the anode of the voltage stabilizing diode V1 is connected with the enabling control end of the power supply conversion chip, one end of the resistor R2 is connected with the anode of the voltage stabilizing diode V1, the other end of the resistor R2 is grounded GND, the power supply output end of the power supply conversion chip is connected with the grid of the, the source electrode of the field effect tube is grounded GND, and the drain electrode of the field effect tube is connected with the input end of the step level detonation module.

The detonation control method of the system comprises the following steps:

step 1: the power supply control method comprises the steps that power is supplied to a power supply input end IN of a power supply conversion chip through a first power supply, 3.3V voltage is output through a power supply output end OUT of the power supply conversion chip, wherein an enabling control end SHDN of the power supply conversion chip is grounded IN an initial state, and the RC module is charged through the first power supply voltage;

step 2: the initial state of the starting voltage of the enable control end SHDN of the power conversion chip is grounded, so that the output end of the RC module cannot be directly connected to the enable control end SHDN of the power conversion chip, the output end of the RC module is connected with the voltage stabilizing diode V1, the output end of the voltage stabilizing diode V1 is grounded through the resistor R2, the current passing through the voltage stabilizing diode V1 is increased through the resistor R2, the voltage difference between the two ends of the voltage stabilizing diode V1 is increased, the voltage between the two ends of the voltage stabilizing diode V1 is rapidly stabilized at 4.7V, and the voltage of the enable control end SHDN of the power conversion chip is further increased.

And step 3: the voltage rise of the output end of the power conversion chip has a voltage rise steep slope with ms-level time, the starting voltage of the field effect transistor is 2-2.4V, the ms-level rise process of the power output end OUT end voltage of the power conversion chip can pass through the starting voltage interval of the field effect transistor for 1-3 ms, the power output end OUT end voltage rise time of the power conversion chip is overlapped with the starting time of the field effect transistor, and finally the starting time of a drain electrode and a source electrode of the field effect transistor can be reduced to us level to reach the condition of generating transient level.

The invention has the beneficial effects that:

the detonation control circuit based on the RC time delay module has the advantages of simple circuit structure, strong impact and overload resistance, low implementation cost, localization of all devices and the like.

The method is characterized in that the corresponding electrical characteristics of components are utilized to eliminate the level slow conversion process brought by the charging process of the RC circuit, and the method comprises the steps of stabilizing the voltage by using a voltage stabilizing circuit, converting the level by using a power conversion chip and utilizing the superposition effect of the level slow conversion of a field effect transistor and the power conversion chip.

The step level step time generated by the detonation control circuit based on RC time delay can reach a microsecond level, and a transient level generating condition is reached.

In addition, each device in the detonation control system adopts a plastic packaging mode, so that the detonation control system has good elastic capacity and can deal with severe environments such as strong impact, high overload and the like.

Drawings

Fig. 1 is a circuit diagram of the present invention.

The device comprises an RC module 1, a voltage stabilizing module 2, a power supply conversion chip 3, a field effect tube 4, a step level detonation module 5, a first power supply 6 and a second power supply 7.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific examples:

the invention designs an initiation control system based on RC time delay, as shown IN figure 1, which comprises an RC module 1, a voltage stabilizing module 2, a power conversion chip 3, a field effect transistor 4 and a step level initiation module 5, wherein the RC module 1 comprises a resistor R1 and a capacitor C1, the voltage stabilizing module 2 comprises a voltage stabilizing diode V1 and a resistor R2, wherein a power input end IN of the power conversion chip 3 is connected with a first power supply 6, one end of the resistor R1 is connected with the first power supply 6, one end of the capacitor C1 is connected with the other end of a resistor R1, the other end of the capacitor C1 is grounded GND, the cathode of the voltage stabilizing diode V1 is connected with the other end of a resistor R1, the anode of the voltage stabilizing diode V1 is connected with an enabling control end SHDN of the power conversion chip 3, one end of the resistor R2 is connected with the anode of the voltage stabilizing diode V1, the other end of the resistor R2 is grounded, the power output end of the power conversion chip 3 is, the output voltage detection end SENSE of the power supply conversion chip 3 is connected with the power supply output end (the SENSE is used for detecting the voltage of the output end and playing a feedback role), the source electrode of the field-effect tube 4 is grounded GND, and the drain electrode of the field-effect tube 4 is connected with the input end of the step level detonation module 5.

In the above technical solution, the step level initiation module 5 includes a capacitor C3 and a resistor R3, one end of the capacitor C3 and one end of the resistor R3 are both connected to the drain of the fet 4, and the other end of the capacitor C3 and the other end of the resistor R3 are both connected to the second power supply 7.

In the above technical solution, the first power supply 6 is a 12V power supply, and the second power supply 7 is a 5V power supply.

In the above technical solution, the ground terminals of the power conversion chip 3 are all grounded to GND.

In the above technical solution, the resistance of the resistor R1 is 15K Ω, and the capacitance of the capacitor C1 is 15 uF.

In the above technical solution, the resistance value of the resistor R2 is 1K Ω.

In the above technical solution, the resistance of the resistor R3 is 11K Ω, and the capacitance of the capacitor C3 is 0.1 uF.

In the technical scheme, the RC module 1 only consists of the resistor and the capacitor, and the adjustment of the delay time of the circuit only needs to adjust the size of the capacitor and the resistor, so that the adjustment of the delay time is simple and convenient. A voltage stabilizing circuit is added at the output end of the RC module 1 to effectively improve the voltage of the open end of the power conversion chip, so that the adjustment threshold of the delay time of the RC circuit is greatly improved.

The starting process of the power conversion chip 3 and the starting process of the field effect tube 4 both have slow-rising processes of a millisecond-level half-starting state, and the two slow-rising processes are overlapped, so that the level lifting time is reduced to a microsecond level, and a transient level generating condition is achieved.

This circuit supplies power for power input end IN of power conversion chip 3 through 12V voltage, can export 3.3V voltage through power output end OUT of power conversion chip 3, wherein, the messenger control end SHDN initial state of power conversion chip 3 will ground connection, and messenger control end SHDN opening voltage of power conversion chip 3 is lower. And the RC delay circuit is charged by the voltage of 12V.

Because the enabling control end SHDN of the power conversion chip 3 is reduced in starting voltage, the output end of the RC circuit cannot be directly connected to the enabling control end SHDN of the power conversion chip 3, so that the output end of the RC circuit is connected with the zener diode V1, the output end of the zener diode V1 is grounded through the resistor R2 with the resistance value of 1K, the current passing through the zener diode V1 can be effectively improved through the resistor R2, the voltage difference between the two ends of the zener diode V1 can be effectively increased, the voltage between the two ends of the zener diode V1 is rapidly stabilized at 4.7V, and the voltage of the enabling control end SHDN of the power conversion chip 3 is further increased.

The voltage rise at the output of the power conversion chip 3 will have a steep voltage rise in ms-order time. The starting voltage of the field effect tube 4 is 2-2.4V, and if the RC delay circuit is directly connected with the grid electrode of the field effect tube 4, the drain electrode and the source electrode of the field effect tube have ms-level voltage starting steep slopes. Therefore, the ms-level lifting process of the voltage at the power output end OUT of the power conversion chip 3 can rapidly pass through the starting voltage of the field-effect tube 4 within 1-3 ms, so that the lifting time of the voltage at the power output end OUT of the power conversion chip 3 is overlapped with the starting time of the field-effect tube 4, and finally the starting time of the drain electrode and the source electrode of the field-effect tube 4 can be reduced to us level to reach the condition of generating transient level.

The circuit finally achieves the aim of generating transient level at the two ends of the input end A and the output end B of the step level initiation module 5 after delaying for 150 ms.

In the scheme, the RC delay circuit and the post-stage circuit are used for generating step signals, so that the selection of the voltage regulator tube, the power conversion chip and the field effect tube with appropriate performance parameters is very important. The parameters of each component selected by the invention are as follows: the model of the voltage-stabilizing diode V1 is BZX84C4V7, the model of the power supply conversion chip 3 is GED1763S8-3P3, and the model of the field effect tube 4 is IRLL2705

In the scheme, the peak-to-peak value of the generated narrow pulse amplitude is 5V, the rising edge time is 300us, and the circuit delay time is 150 ms. The circuit can adjust the numerical value of the RC according to the required delay time.

Details not described in this specification are within the skill of the art that are well known to those skilled in the art.