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 CxAnd a current limiting resistor Rx;
Filter capacitor CxOne end of the contact is connected with one end of a relay J, and the filter capacitor CxThe other end of the first and second electrodes is grounded;
current limiting resistor RxOne end is grounded and connected with a filter capacitor CxOne terminal of (1), a current limiting resistor RxThe 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 CxThe value range of (a) is 10nf to 100 nf.
Current limiting resistor RxThe 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 RgAnd the equivalent resistance R of the initiating explosive deviceh;
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 RgOne end of the resistor is connected with the grid of the detonation MOS tube, and the grid current-limiting resistor RgThe 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 RhOne end of (1), an initiating explosive device equivalent resistance RhThe 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.
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 CxAnd a current limiting resistor Rx;
The circuit can pass through a filter capacitor CxWhen 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 RxThe current flowing through the contact of the relay J is limited, and the overcurrent is avoided.
Filter capacitor CxOne end of the contact is connected with one end of a relay J, and the filter capacitor CxThe 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 RxOne end is grounded and connected with a filter capacitor CxOne terminal of (1), a current limiting resistor RxThe 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 CxThe value range of 10nf to 100nf, the embodiment of the utility model provides an in the embodiment of the filter capacitor CxThe value is 50 nf.
Current limiting resistor RxThe value range of the current limiting resistor R is 20-200 ohm, the embodiment of the utility model provides anxThe 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 RgAnd the equivalent resistance R of the initiating explosive deviceh;
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 RgOne end of the resistor is connected with the grid of the detonation MOS tube, and the grid current-limiting resistor RgThe 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 RhOne end of (1), an initiating explosive device equivalent resistance RhThe 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.
Examples
Circuit connection referring to FIG. 1, filter capacitor CxThe reference range of the value is 10 nf-100 nf, and the resistance RxThe 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 CxOne end connected with a voltage dividing resistor R2The other end of the relay contact is grounded. Current limiting resistor RxOne 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 connectedxWith a value of 50nf (two 100nf connected in series), a current limiting resistor RxThe 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.