CN215072341U

CN215072341U - A relay debounce circuit and a detonation circuit used in a detonation module of pyrotechnics

Info

Publication number: CN215072341U
Application number: CN202120913201.6U
Authority: CN
Inventors: 杨依衡; 王嘉靖; 毕林杰; 汪嵩; 王君召; 谢霞明
Original assignee: Shanghai Academy of Spaceflight Technology SAST
Current assignee: Shanghai Academy of Spaceflight Technology SAST
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-12-07
Anticipated expiration: 2031-04-29

Abstract

The utility model relates to a relay de-jitter circuit and a detonation circuit used in a detonation module of pyrotechnics. This circuit is connected with the voltage divider resistor R ₂ which provides the bias voltage for the G-S end of the MOS transistor. The relay debounce circuit _is composed of a relay J, a filter capacitor _Cx , and a current limiting resistor Rx. _The circuit can filter the voltage jitter of the contact terminal connected to the voltage dividing resistor R2 when the relay J is closed through the filter capacitor _Cx , provide a stable voltage to the G pole of the detonating MOS tube, and speed up the stable opening of the detonating MOS tube. At the same time, the current flowing through the contacts of the relay can be limited _by the current limiting resistor Rx to avoid overcurrent.

Description

Relay jitter elimination circuit for initiating explosive device detonation module and detonation circuit

Technical Field

The utility model relates to a space power supply technical field, concretely relates to a relay that is arranged in initiating explosive device detonation module disappears and trembles circuit.

Background

The initiating explosive device detonation module is an important component of a satellite power supply system and is used for driving initiating explosive devices to detonate, so that the solar wings of the satellite are opened, and the normal work of the satellite can be directly related. In order to ensure the accurate detonation of the initiating explosive device, the detonation module needs to provide a large current with a steep rising edge, so that the requirement on the switching-on speed of the detonation MOS tube is high. At present, a relay contact is directly connected with a divider resistor which provides bias voltage for a G-S end of an MOS tube without any treatment, and the method is a widely used method for controlling the opening of a detonation MOS tube. However, because the relay can generate mechanical vibration when being closed, the connection mode is difficult to provide stable voltage for the MOS transistor G pole in a reliable instant, and the stable opening speed of the MOS transistor is difficult to meet the requirement aiming at some types of initiating explosive devices.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a voltage jitter that brings because of mechanical shake when filtering relay is closed improves the stable speed of opening of initiating explosive device initiating MOS pipe in the initiating explosive device initiating module, and then guarantees the reliable initiating of initiating explosive device. The circuit consists of a resistor and a capacitor, which are common components in engineering, and is beneficial to product manufacturing.

The technical scheme is as follows:

a relay removes trembles circuit for in initiating explosive device detonation module, relay removes trembles circuit and includes relay J, filter capacitor C_xAnd a current limiting resistor R_x；

Filter capacitor C_xOne end of the contact is connected with one end of a relay J, and the filter capacitor C_xThe other end of the first and second electrodes is grounded;

current limiting resistor R_xOne end is grounded and connected with a filter capacitor C_xOne terminal of (1), a current limiting resistor R_xThe other end of the relay is connected with a contact at the other end of the relay J; the contact at one end of the relay J is connected with the relay through a divider resistorAnd the grid of the detonation MOS tube in the ignition work piece detonation circuit is connected.

Filter capacitor C_xThe value range of (a) is 10nf to 100 nf.

Current limiting resistor R_xThe value of (A) is in the range of 20 to 200 ohm.

The relay type is 2JL 0.5-1.

An initiating explosive device detonation circuit using the relay jitter elimination circuit for the initiating explosive device detonation module further comprises: voltage dividing resistor R₁A voltage dividing resistor R₂Grid current limiting resistor R_gAnd the equivalent resistance R of the initiating explosive device_h；

Voltage dividing resistor R₁One end of the resistor is connected with a source electrode of the detonation MOS tube and a grid current-limiting resistor R_gOne end of the resistor is connected with the grid of the detonation MOS tube, and the grid current-limiting resistor R_gThe other end of the resistor is connected with a divider resistor R₂One end of (1) and a voltage dividing resistor R₁The other end of (1), a voltage dividing resistor R₂The other end of the relay is connected with a contact at one end of a relay J;

the drain electrode of the detonation MOS tube is connected with an initiating explosive device equivalent resistor R_hOne end of (1), an initiating explosive device equivalent resistance R_hThe other end of the first and second electrodes is grounded;

and the source electrode of the detonation MOS tube is connected with the output positive end of the power supply.

Drawings

Fig. 1 is a basic schematic diagram of a relay debouncing circuit for use in an initiating explosive device detonation module.

Detailed Description

The relay jitter elimination circuit and the initiation circuit for use in the initiating explosive device initiating module according to the present invention will be described in further detail with reference to fig. 1.

A kind of relay used in initiating explosive device detonation module disappears and shakes the circuit, this circuit and divider resistor R providing bias voltage for MOS tube G-S end₂Are connected. The relay jitter elimination circuit comprises a relay J and a filter capacitor C_xAnd a current limiting resistor R_x；

The circuit can pass through a filter capacitor C_xWhen the filtering relay J is closed, the filtering relay J is connected with the divider resistor R₂Connected contactsThe voltage of the end is jittered, so that stable voltage is provided for the grid electrode of the detonation MOS tube, the stable opening speed of the detonation MOS tube is accelerated, and meanwhile, the detonation MOS tube can also pass through the current-limiting resistor R_xThe current flowing through the contact of the relay J is limited, and the overcurrent is avoided.

Filter capacitor C_xOne end of the contact is connected with one end of a relay J, and the filter capacitor C_xThe other end of the first and second electrodes is grounded; the device is used for filtering voltage jitter of the contact end when the relay contact is closed and accelerating the switching-on speed of the MOS tube.

Current limiting resistor R_xOne end is grounded and connected with a filter capacitor C_xOne terminal of (1), a current limiting resistor R_xThe other end of the relay is connected with a contact at the other end of the relay J; limiting the current flowing through the contacts when the relay contacts are closed.

And a contact at one end of the relay J is connected with a grid electrode of an initiation MOS tube in the initiating explosive device initiation circuit through a voltage dividing resistor.

Filter capacitor C_xThe value range of 10nf to 100nf, the embodiment of the utility model provides an in the embodiment of the filter capacitor C_xThe value is 50 nf.

Current limiting resistor R_xThe value range of the current limiting resistor R is 20-200 ohm, the embodiment of the utility model provides an_xThe value is 110 ohm.

The relay type is 2JL 0.5-1.

An initiating explosive device detonation circuit using the relay jitter elimination circuit for the initiating explosive device detonation module comprises: voltage dividing resistor R₁A voltage dividing resistor R₂Grid current limiting resistor R_gAnd the equivalent resistance R of the initiating explosive device_h；

Examples

Circuit connection referring to FIG. 1, filter capacitor C_xThe reference range of the value is 10 nf-100 nf, and the resistance R_xThe value of the relay is determined according to the maximum current which can be borne by an electric shock of the relay, generally 20-200 ohm is selected, and the relay is selected as an electromagnetic relay.

Filter capacitor C_xOne end connected with a voltage dividing resistor R₂The other end of the relay contact is grounded. Current limiting resistor R_xOne end is not connected with the divider resistor R₂The other end of the relay contact is grounded. By the connection mode, the purposes of filtering the voltage jitter of the relay contact terminal, accelerating the stable switching-on speed of the MOS tube and limiting the current flowing through the contact are achieved.

In a practical project, the filter capacitor C is connected_xWith a value of 50nf (two 100nf connected in series), a current limiting resistor R_xThe value is 110ohm, the relay is selected to be 2JL0.5-1, a good shake eliminating effect can be obtained, and the stable opening speed of the MOS tube can be obviously improved.

Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be construed as limiting the present invention, and that other variations and modifications which may occur to those skilled in the art without departing from the spirit and scope of the present invention are also within the scope of the present invention.

Claims

1. a relay debounce circuit for use in an explosive device detonating module, is characterized in that: the relay debounce circuit comprises relay J, filter capacitor C _x and current limiting resistor R _x ;

One end of the filter capacitor C _x is connected to the contact at one end of the relay J, and the other end of the filter capacitor C _x is grounded;

One end of the current limiting resistor R _x is grounded and connected to one end of the filter capacitor C _x , and the other end of the current limiting resistor R _x is connected to the contact of the other end of the relay J;

The contact at one end of the relay J is connected to the grid of the detonating MOS tube in the detonating circuit of the pyrotechnic material through a voltage dividing resistor.

2 . The relay debouncing circuit used in the detonation module of the pyrotechnic product according to claim 1 , wherein the value range of the filter capacitor _Cx is 10nf～100nf. 3 .

3 . The relay debouncing circuit used in the detonation module of the pyrotechnic product according to claim 2 , wherein the filter capacitor C _x is 50nf. 4 .

4 . The relay de-jitter circuit for use in a detonation module of an explosive device according to claim 1 , wherein the value range of the current limiting resistor Rx _is 20ohm-200ohm. 5 .

5 . The relay debouncing circuit used in the detonation module of an explosive device according to claim 4 , wherein the value of the current limiting resistor R _x is 110 ohm. 6 .

6 . The relay debouncing circuit for use in a pyrotechnic detonation module according to any one of claims 1 to 5 , wherein the relay is selected as 2JL0.5-1. 7 .

7. Utilize a kind of pyrotechnic device detonation circuit for the relay debouncing circuit in the pyrotechnic device detonation module as claimed in claim 6, it is characterized in that, also comprises: divider resistor R ₁ , divider resistor R ₂ , the gate current limiting resistance R _g , the equivalent resistance of the pyrotechnic product R _h ;

_One end of the voltage dividing resistor R1 is connected to the source of the detonating MOS tube, one end of the gate current limiting resistor _Rg is connected to the gate of the detonating MOS tube, and the other end of the gate current limiting resistor _Rg is connected to one end of the voltage dividing resistor _R2 and the divider. _The other end of the piezoresistor R1, the other end of the divider resistor R2 is connected to the contact of _one end of the relay J;

The drain of the detonating MOS tube is connected to one end of the equivalent resistance R _h of the pyrotechnic product, and the other end of the equivalent resistance R _h of the pyrotechnic product is grounded;

The source of the detonating MOS tube is connected to the positive output terminal of the power supply.