CN210802244U

CN210802244U - Radio frequency interference resisting circuit for electronic detonator

Info

Publication number: CN210802244U
Application number: CN201921114464.XU
Authority: CN
Inventors: 马中平; 梁玉彬; 吁强骏
Original assignee: Guangxi Zhongbo Electronic Technology Co ltd
Current assignee: Guangxi Zhongbo Electronic Technology Co ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-06-19
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to the technical field of circuits, and discloses an anti-radio frequency interference circuit for an electronic detonator, which comprises a direct-current voltage line V +1, a direct-current power line V-1, a transient suppression diode D1, a resistor R1, a high-speed switch diode D2, an RFI filter L2 and an LC filter circuit; one end of the transient suppression diode D1 is connected with the direct-current voltage line V +1, and the other end of the transient suppression diode D1 is connected with the direct-current voltage line V-1; one end of a resistor R1 is connected to a direct-current voltage line V +1, the high-speed switching diode D2 is provided with 6 pins (1 pin, 2 pins, 3 pins, 4 pins, 5 pins and 6 pins), the other end of the resistor R1 is connected to the 6 pins of the high-speed switching diode, the 1 pin and the 4 pins of the high-speed switching diode are grounded, the 3 pin of the high-speed switching diode is connected to a direct-current power supply line V-1, the 2 pins and the 5 pins of the high-speed switching diode are both connected with the input end of an RFI filter L2, and the output end of the RFI filter L2 is connected with an LC filter circuit; the radio frequency interference resistance of the electronic detonator is greatly improved.

Description

Radio frequency interference resisting circuit for electronic detonator

Technical Field

The utility model belongs to the technical field of the technique of circuit and specifically relates to an anti radio frequency interference circuit for among the electronic detonator.

Background

The electronic detonator is also called a digital electronic detonator, a digital detonator or an industrial digital electronic detonator, namely an electronic detonator which controls the detonation process by adopting an electronic control module.

The electronic control module is a special circuit module which is arranged in a digital electronic detonator, has functions of controlling detonator initiation delay time and initiating energy, is internally provided with a detonator identity information code and a detonator initiation password, can test functions and performance of the electronic control module and electrical performance of a detonator ignition element, and can communicate with an initiation controller and other external control equipment.

The electronic control module of the electronic detonator converts the initiation signal into an electric signal to be transmitted to the initiator, and the initiation precision of the electronic detonator is higher and higher at present, so that extremely high requirements, particularly the radio frequency interference resistance, are put forward on the stability and the interference resistance of signal transmission in the electronic detonator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti radio frequency interference circuit for among the electronic detonator aims at solving the poor problem of anti radio frequency interference ability of electronic detonator among the prior art.

The utility model discloses a realize like this for anti radio frequency interference circuit in the electron detonator, including direct current voltage line V +1, direct current power cord V-1, transient state suppression diode D1, resistance R1, high-speed switch diode D2, RFI wave filter L2 and LC filter circuit; one end of the transient suppression diode D1 is connected with the direct-current voltage line V +1, and the other end of the transient suppression diode D1 is connected with the direct-current voltage line V-1; one end of the resistor R1 is connected to the direct-current voltage line V +1, the high-speed switching diode D2 has pins 1, 2, 3, 4, 5 and 6, the other end of the resistor R1 is connected to pin 6 of the high-speed switching diode, pins 1 and 4 of the high-speed switching diode are grounded, pin 3 of the high-speed switching diode is connected to the direct-current voltage line V-1, pins 2 and 5 of the high-speed switching diode are both connected to the input end of the RFI filter L2, and the output end of the RFI filter L2 is connected to the LC filter circuit.

Further, the LC filter circuit includes an inductor L1 and a capacitor C4; one end of the inductor L1 is connected to the output end of the RFI filter L2, one end of the capacitor C4 is connected to the other end of the inductor L1, and the other end of the capacitor C4 is grounded.

Compared with the prior art, the radio frequency interference resisting circuit for the electronic detonator, provided by the utility model, the direct current voltage line V +1 and the direct current power line V-1 are used for power supply and communication signal transmission; the transient voltage suppression diode D1 is a high-performance protection device in the form of a diode, which can change the impedance value between two terminals from high impedance to low impedance at a very high speed to absorb an instantaneous large current, thereby clamping the voltage between two terminals thereof to a predetermined value, and also can rapidly discharge static electricity, thereby protecting the following circuit elements from the impact of transient high-voltage spike pulses, and thus protecting the following devices from static electricity; the resistor R1 can absorb a part of large current to protect the rear device from current impact; the high-speed switch diode D2 is an internally integrated diode, when static electricity passes through the high-speed switch diode D2, the internal diode is broken down, so that a conductor is formed, the static electricity is quickly discharged through the grounding at the other end, and the function of protecting a rear circuit is achieved; when the current flowing through the RFI filter L2 changes, the induced electromotive force in the RFI filter L2 will prevent the change of the current, specifically, when the current increases, the RFI filter L2 prevents the increase of the current, and simultaneously converts a part of the electric energy into magnetic field energy to be stored in the RFI filter L2; when the current decreases, the RFI filter L2 blocks the decrease in current while discharging the stored energy to compensate for the decrease in current; when radio frequency interference exists, the waveform of the signal passing through the RFI filter L2 is still smoothed; the LC filter circuit further enables the waveform of the passing signal to be smoother, so that the radio frequency interference can be resisted; the L2 and the LC filter circuit form a double-path radio frequency interference resistance, and the radio frequency interference resistance of the electronic detonator is greatly improved.

Drawings

Fig. 1 is a schematic circuit structure diagram of an anti-radio frequency interference circuit for use in an electronic detonator provided by an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

Referring to fig. 1, a preferred embodiment of the present invention is provided.

The radio frequency interference resisting circuit for the electronic detonator comprises a direct-current voltage line V +1, a direct-current power line V-1, a transient suppression diode D1, a resistor R1, a high-speed switching diode D2, an RFI filter L2 and an LC filter circuit; one end of the transient suppression diode D1 is connected with the direct-current voltage line V +1, and the other end of the transient suppression diode D1 is connected with the direct-current voltage line V-1; one end of the resistor R1 is connected to the direct-current voltage line V +1, the high-speed switching diode D2 has pins 1, 2, 3, 4, 5 and 6, the other end of the resistor R1 is connected to pin 6 of the high-speed switching diode, pins 1 and 4 of the high-speed switching diode are grounded, pin 3 of the high-speed switching diode is connected to the direct-current voltage line V-1, pins 2 and 5 of the high-speed switching diode are both connected to the input end of the RFI filter L2, and the output end of the RFI filter L2 is connected to the LC filter circuit.

Thus, the direct current voltage line V +1 and the direct current power line V-1 are used for power supply and communication signal transmission; the transient voltage suppression diode D1 is a high-performance protection device in the form of a diode, which can change the impedance value between two terminals from high impedance to low impedance at a very high speed to absorb an instantaneous large current, thereby clamping the voltage between two terminals thereof to a predetermined value, and also can rapidly discharge static electricity, thereby protecting the following circuit elements from the impact of transient high-voltage spike pulses, and thus protecting the following devices from static electricity; the resistor R1 can absorb a part of large current to protect the rear device from current impact; the high-speed switch diode D2 is an internally integrated diode, when static electricity passes through the high-speed switch diode D2, the internal diode is broken down, so that a conductor is formed, the static electricity is quickly discharged through the grounding at the other end, and the function of protecting a rear circuit is achieved; when the current flowing through the RFI filter L2 changes, the induced electromotive force in the RFI filter L2 will prevent the change of the current, specifically, when the current increases, the RFI filter L2 prevents the increase of the current, and simultaneously converts a part of the electric energy into magnetic field energy to be stored in the RFI filter L2; when the current decreases, the RFI filter L2 blocks the decrease in current while discharging the stored energy to compensate for the decrease in current; when radio frequency interference exists, the waveform of the signal passing through the RFI filter L2 is still smoothed; the LC filter circuit further enables the waveform of the passing signal to be smoother, so that the radio frequency interference can be resisted; the L2 and the LC filter circuit form a double-path radio frequency interference resistance, and the radio frequency interference resistance of the electronic detonator is greatly improved.

Specifically, the LC filter circuit includes an inductance L1 and a capacitance C4; one end of the inductor L1 is connected to the output end of the RFI filter L2, one end of the capacitor C4 is connected to the other end of the inductor L1, and the other end of the capacitor C4 is grounded; the characteristics of charging of the capacitor C4 and energy storage of the inductor L1 are utilized to make the waveform of the passing signal smoother, so that the radio frequency interference can be resisted.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The radio frequency interference resisting circuit for the electronic detonator is characterized by comprising a direct current voltage line V +1, a direct current power line V-1, a transient suppression diode D1, a resistor R1, a high-speed switching diode D2, an RFI filter L2 and an LC filter circuit; one end of the transient suppression diode D1 is connected with the direct-current voltage line V +1, and the other end of the transient suppression diode D1 is connected with the direct-current voltage line V-1; one end of the resistor R1 is connected to the direct-current voltage line V +1, the high-speed switching diode D2 has pins 1, 2, 3, 4, 5 and 6, the other end of the resistor R1 is connected to pin 6 of the high-speed switching diode, pins 1 and 4 of the high-speed switching diode are grounded, pin 3 of the high-speed switching diode is connected to the direct-current voltage line V-1, pins 2 and 5 of the high-speed switching diode are both connected to the input end of the RFI filter L2, and the output end of the RFI filter L2 is connected to the LC filter circuit.

2. The anti-radio frequency interference circuit for use in electronic detonators of claim 1 wherein the LC filter circuit includes an inductance L1 and a capacitance C4; one end of the inductor L1 is connected to the output end of the RFI filter L2, one end of the capacitor C4 is connected to the other end of the inductor L1, and the other end of the capacitor C4 is grounded.