Disconnector for triggering seismographs

Abstract

An isolation trigger switch used in a seismograph includes a trigger end circuit and a sensing end circuit, wherein the trigger end circuit includes a first terminal, a power switch, a power indicator light, a light emitting diode, a power supply and a second terminal connected in sequence; the sensing end circuit includes a photoelectric sensor, a sensing end power supply, a sensing end power switch, a sensing end power indicator light, a first terminal of the sensing end and a second terminal of the sensing end, wherein the first terminal of the sensing end is respectively connected to the sensing end power indicator light and the sensing end power switch, the sensing end power indicator light is connected to the photoelectric sensor, the sensing end power switch is connected to the sensing end power supply, the sensing end power supply is connected to the photoelectric sensor, and the signal end of the photoelectric sensor is connected to the second terminal of the sensing end; and the light emitting diode is connected to the photoelectric sensor signal. It isolates the current interference of the trigger end and the trigger line end of the seismograph, and the collected signal is no longer subject to external electromagnetic interference, thus avoiding the problem of instrument circuit burnout caused by direct access of large current.

Description

Technical Field

[0001] The invention belongs to a trigger signal control device for an engineering seismograph, in particular to an isolation trigger switch applied to a seismograph. Background Art

[0002] When collecting data, a seismograph needs to provide a timing start signal, which is achieved by disconnecting or short-circuiting the trigger line connected to the seismograph. The trigger principle is that the disconnection or short-circuit of the signal line causes the voltage at the trigger end of the instrument to change, and the voltage change turns on the timing switch, and then the instrument starts recording data. This method has the following risks: First, the contact between the trigger line and the strong voltage causes a large current to pass through the instrument, burning the instrument; second, the external stray current is transmitted to the inside of the instrument through the trigger line, and the instrument is interfered by the stray current, causing signal distortion. Summary of the invention

[0003] The purpose of the present invention is to provide an isolation trigger switch for use in a seismograph with a simple structure and good use effect, so as to reduce the influence of external current on the instrument and isolate high voltage to protect the instrument equipment.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an isolation trigger switch applied to a seismograph, characterized in that: the isolation trigger switch includes a trigger end circuit and a sensing end circuit, and the trigger end circuit and the sensing end circuit are connected through a photoelectric sensing switch.

[0005] The trigger end circuit includes a light-emitting diode, a power supply, a power switch, a power indicator light, a first terminal and a second terminal, and the first terminal, the power switch, the power indicator light, the light-emitting diode, the power supply and the second terminal are connected in sequence; the sensing end circuit includes a photoelectric sensor, a sensing end power supply, a sensing end power switch, a sensing end power indicator light, a first terminal and a second terminal, and the first terminal of the sensing end is respectively connected to the sensing end power indicator light and the sensing end power switch, the sensing end power indicator light is connected to the photoelectric sensor, the sensing end power switch is connected to the sensing end power supply, the sensing end power supply is connected to the photoelectric sensor, and the signal end of the photoelectric sensor is connected to the second terminal of the sensing end; the light-emitting diode is connected to the photoelectric sensor signal.

[0006] When working, the trigger line connected to the seismograph is connected to the signal sensing end of the present invention, and the trigger line connected to the explosive is connected to the signal generating end of the present invention. The two circuits are connected by a photoelectric isolating switch inside the present invention. The photoelectric isolating switch includes two parts, namely, the sensing end circuit connected to the seismograph end and the trigger end circuit connected to the explosive. The sensing end circuit connected to the seismograph end first provides the seismograph with a stable state of open circuit or short circuit. When the electric detonator explodes, the circuit connected to the trigger end of the present invention is disconnected, the light emitting diode goes out, and the sensing end immediately senses the diode signal to provide the instrument with an open circuit or short circuit state, thereby triggering the seismograph and starting data recording. The trigger signal of the device of the present invention is transmitted by light, thereby avoiding interference of external current on the instrument.

[0007] The present invention utilizes a photoelectric coupling switch composed of a photoelectric sensor at the sensing end and a light-emitting diode at the triggering end to isolate the current interference at the triggering end and the triggering line end of the seismograph, thereby achieving the purpose of completely separating the circuit in the instrument from external stray current interference through the photoelectric switch. The signal collected by the seismograph is no longer subject to external electromagnetic interference, thus avoiding the problem of instrument circuit burnout caused by large current directly connected to the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention;

[0009] Figure 2 It is a schematic diagram of the connection between the present invention and the trigger end of the seismograph;

[0010] Figure 3 This is the connection mode between the present invention and the explosive.

[0011] In the figure: 1—the first terminal at the sensing end (connected to the negative pole of the seismograph trigger line), 2—the power indicator light at the sensing end, 3—the power switch at the sensing end, 4—the power supply at the sensing end, 5—the photoelectric sensor, 6—the second terminal at the sensing end (connected to the positive pole of the seismograph trigger line), 7—the power indicator light, 8—the power switch, 9—the first terminal, 10—the light-emitting diode, 11—the power supply, 12—the second terminal; 13—the seismograph, 14—the negative pole of the seismograph trigger line, 15—the positive pole of the seismograph trigger line, 16—the explosive. DETAILED DESCRIPTION

[0012] like Figure 1As shown: an isolation trigger switch used in a seismograph, characterized in that: the isolation trigger switch includes a trigger end circuit and a sensing end circuit, and the trigger end circuit and the sensing end circuit are connected through a photoelectric sensing switch. The trigger end circuit includes a light emitting diode 10, a power supply 11, a power switch 8, a power indicator light 7, a first terminal 9 and a second terminal 10; the first terminal 9, the power switch 8, the power indicator light 7, the light emitting diode 10, the power supply 11 and the second terminal 12 are connected in sequence; the sensing end circuit includes a photoelectric sensor 5, a sensing end power supply 4, a sensing end power switch 3, a sensing end power indicator light 2, a sensing end first terminal 1 and a sensing end second terminal 6, the sensing end first terminal 1 is respectively connected to the sensing end power indicator light 2 and the sensing end power switch 3, the sensing end power indicator light 2 is connected to the photoelectric sensor 5, the sensing end power switch 3 is connected to the sensing end power supply 4, the sensing end power supply 4 is connected to the photoelectric sensor 5, and the signal end of the photoelectric sensor 5 is connected to the sensing end second terminal 6; the light emitting diode 10 is connected to the photoelectric sensor 5 signal. The light emitting diode 10 at the trigger end has two leads. The positive electrode of the power supply 11 is connected to the positive electrode of the light emitting diode 10 , and the negative electrode of the power supply 11 is connected to the second terminal 12 .

[0013] The seismograph 13 is provided with a negative pole 14 of the seismograph trigger line and a positive pole 15 of the seismograph trigger line, see Figure 2 and Figure 3 : When working, the first terminal 1 of the sensing end is connected to the negative pole 14 of the seismograph trigger line, and the second terminal 6 of the sensing end is connected to the positive pole 15 of the seismograph trigger line. The first terminal 9 and the second terminal 12 of the signal generating end, i.e. the trigger end, only need to be connected and tied to the connection line of the explosive 16. When the explosive explodes, the connection line between the first terminal 9 and the second terminal 12 is disconnected.

[0014] The technical parameter of the present invention is: the response speed of the light emitting diode is less than 62.5 microseconds.

Claims

1. An isolation trigger switch used in a seismograph, characterized in that: The isolation trigger switch comprises a trigger end circuit and a sensing end circuit, and the trigger end circuit and the sensing end circuit are connected via a photoelectric sensing switch; The trigger end circuit comprises a light emitting diode (10), a power supply (11), a power switch (8), a power indicator light (7), a first terminal (9) and a second terminal (12); the first terminal (9), the power switch (8), the power indicator light (7), the light emitting diode (10), the power supply (11) and the second terminal (12) are connected in sequence; the sensing end circuit comprises a photoelectric sensor (5), a sensing end power supply (4), a sensing end power switch (3), a sensing end power indicator light (2), a sensing end first terminal (1) and a sensing end second terminal (6); the sensing end first terminal (1) is respectively connected to the sensing end power indicator light (2) and the sensing end power switch (3); the sensing end power indicator light (2) is connected to the photoelectric sensor (5); the sensing end power switch (3) is connected to the sensing end power supply (4); the sensing end power supply (4) is connected to the photoelectric sensor (5); the signal end of the photoelectric sensor (5) is connected to the sensing end second terminal (6); the light emitting diode (10) is signal-connected to the photoelectric sensor (5); The first terminal (1) at the sensing end is connected to the negative pole (14) of the seismograph trigger line, and the second terminal (6) at the sensing end is connected to the positive pole (15) of the seismograph trigger line; the first terminal (9) and the second terminal (12) at the trigger end are tied to the connection line of the explosive (16).

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