CN109341411B - a trigger circuit - Google Patents

Abstract

The invention discloses a trigger circuit. The trigger circuit includes: a channel switching unit, a level switching unit and an output level limiting unit, there are multiple level switching units, and the channel switching unit is used to input the level signal to the corresponding level according to the type of the photoelectric speed measuring target conversion unit, the output end of the level conversion unit is connected with the input end of the output level limiting unit, and the level limiting unit is used to limit the voltage amplitude of the level signal passing through the level conversion unit to a set value and output it, The output signal of the level-defining unit is the trigger signal for starting the end-killing effect test system of small arms. The trigger circuit provided by the invention is suitable for the level signals output by a variety of different types of photoelectric speed measuring targets, and has the characteristics of wide application and high efficiency.

Description

a trigger circuit

technical field

The invention relates to the field of triggering, in particular to a triggering circuit.

Background technique

The end-kill effect of light weapons is an important technical indicator for evaluating the killing performance of light weapons. Relevant tests are required in the design, development, transformation, and finalization of light weapons. The test of the end-kill effect of light weapons must be carried out under the conditions of known projectile firing rates. It makes sense to test. After years of development, the shooting range will purchase new photoelectric speed targets every five to six years to maintain or even improve the test accuracy of the projectile firing rate. The end-killing effect test system of light weapons usually uses the level signal output by the photoelectric speed target as the trigger signal for its activation. Over the years, the types of photoelectric speed targets purchased at the shooting range are different, and the output level signals are also different for different test items. It responds to a certain fixed level signal, but cannot respond to the level signal output by other types of photoelectric speed targets, so that different types of photoelectric speed targets need to be equipped with corresponding trigger circuits and data acquisition systems. , before the test, the trigger circuit and data acquisition system need to be replaced frequently, resulting in a waste of labor and resources.

Moreover, in the test system, if the trigger circuit is not matched with the photoelectric speed measuring target, the amplitude of the level signal output by the photoelectric speed measuring target may be much larger than the amplitude of the level signal that the trigger circuit can receive, thereby damaging the trigger circuit; If the trigger circuit is not matched with the data acquisition system, the amplitude of the level signal output by the trigger circuit may be much larger than the amplitude of the start-up level signal of the data acquisition system, thereby damaging the data acquisition system and making the data acquisition system unable to work normally. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a trigger circuit, which is suitable for the level signals output by a variety of different types of photoelectric speed measuring targets, and has the characteristics of wide application and high efficiency.

For achieving the above object, the present invention provides the following scheme:

A trigger circuit, the trigger circuit is used in a light weapon end point killing effect test system, used to receive a level signal output by a photoelectric speed measuring target, and start the light weapon end point killing effect test system according to the level signal, the The trigger circuit includes: a channel switching unit, a level switching unit and an output level defining unit, the level switching units are multiple, and the channel switching unit is used for changing the level according to the type of the photoelectric speed measuring target. The signal is input to the corresponding level conversion unit, and the output end of the level conversion unit is connected to the input end of the output level definition unit, and the level definition unit is used to convert the signal passing through the level conversion unit. The voltage amplitude of the level signal is limited to a set value and output, and the output signal of the level limiting unit is a trigger signal for starting the end-killing effect test system of the light weapon.

Optionally, the level conversion unit includes a first level conversion circuit, a second level conversion circuit, a third level conversion circuit and a fourth level conversion circuit, the first level conversion circuit, the second level conversion circuit The level conversion circuit, the third level conversion circuit and the fourth level conversion circuit are independent of each other, and the first level conversion circuit is used for leveling the output signal of the photoelectric speed measuring target whose output level signal is +1.2V conversion, the second level conversion circuit is used for level conversion of the output signal of the photoelectric speed measuring target whose output level signal is -9V, and the third level conversion circuit is used for the output level signal of +5V The output signal of the photoelectric speed-measuring target is level-converted, and the fourth level-conversion circuit is used for level-converting the output signal of the photoelectric speed-measuring target whose output level signal is +13V.

Optionally, the channel switching unit includes a first relay, a second relay, a third relay and a fourth relay, and the output terminal of the photoelectric speed measuring target is connected to the first level conversion circuit through the first relay. , the output end of the photoelectric speed target is also connected with the second level conversion circuit through the second relay, and the output end of the photoelectric speed target is also connected with the third level conversion circuit through the third relay The output end of the photoelectric speed measuring target is also connected with the fourth level conversion circuit through the fourth relay.

Optionally, the first level conversion circuit includes a level amplitude verification unit and a voltage amplification unit, the level amplitude verification unit is used to detect the validity of the output level signal of the photoelectric speed measuring target, and the voltage amplifies The unit is used to amplify the valid said level signal.

Optionally, the level and amplitude verification unit includes a voltage comparator, and the two input ends of the voltage comparator are respectively connected with the output end of the photoelectric speed measuring target and the reference voltage, and the reference voltage is preset. voltage, when the level signal output by the photoelectric speed measuring target is greater than the reference voltage, it indicates that the level signal is valid.

Optionally, the second level conversion circuit includes a rectifier bridge and a first photoelectric coupling switch, the input end of the rectifier bridge is connected to the output end of the photoelectric speed measuring target, and the output end of the rectifier bridge is connected to the output end of the photoelectric speed measuring target. The input end of the first photoelectric coupling switch is connected, and the output end of the first photoelectric coupling switch is connected with the output level defining unit.

Optionally, the third level conversion circuit includes a voltage follower, the input terminal of the voltage follower is connected to the output terminal of the photoelectric speed measuring target, and the output terminal of the voltage follower is connected to the output terminal. Connect the flat limiting units.

Optionally, the fourth level conversion circuit includes a second photoelectric coupling switch, the input end of the second photoelectric coupling switch is connected to the output end of the photoelectric speed measuring target, and the output end of the second photoelectric coupling switch is connected. The terminal is connected with the output level defining unit.

Optionally, the trigger circuit further includes a controller, the controller is used to control the opening and closing of the relay, and the controller is also used to control the voltage follower to follow the level signal output by the photoelectric speed measuring target. .

Optionally, the trigger circuit further includes a power supply unit, and the power supply unit supplies power to the trigger circuit and the controller.

According to the specific embodiment provided by the present invention, the present invention discloses the following technical effects: the trigger circuit provided by the present invention comprises: a channel switching unit, a level converting unit and an output level limiting unit, wherein there are multiple level converting units, and the channel switching unit The unit is used to input the level signal to the corresponding level conversion unit according to the type of photoelectric speed target, the output end of the level conversion unit is connected with the input end of the output level limiting unit, and the level limiting unit is used to The voltage amplitude of the level signal of the level conversion unit is limited to the set value and output, and the output signal of the level limiting unit is the trigger signal for starting the end-killing effect test system of the light weapon. The invention sets up a plurality of level conversion units according to different types of photoelectric speed measuring targets, which can respond to the output level signals of various photoelectric speed measuring targets, and does not need to separately design trigger circuits for different types of photoelectric speed measuring targets, avoiding the need for testing Previously, different trigger circuits and data acquisition systems were replaced for different photoelectric speed targets to improve the efficiency of the end-kill effect test of light weapons.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural schematic diagram of the end-point killing effect test system of light weapons;

FIG. 2 is a block diagram of a trigger circuit according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a trigger circuit, which is suitable for the level signals output by a variety of different types of photoelectric speed measuring targets, and has the characteristics of wide application and high efficiency.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the structure of a light weapon endpoint killing effect test system. As shown in Fig. 1, the trigger circuit provided by the present invention is applied to a light weapon endpoint killing effect test system, for receiving the level signal output by the photoelectric speed target, and according to the The level signal activates the end-killing effect test system of the light weapon.

FIG. 2 is a block diagram of a trigger circuit according to an embodiment of the present invention. As shown in FIG. 2, the trigger circuit includes: a channel switching unit 2, a level shifting unit 3 and an output level limiting unit 4. There are multiple level shifting units, and the channel The switching unit 2 is used to input the level signal to the corresponding level conversion unit 3 according to the type of the photoelectric speed measuring target 1, and the output end of the level conversion unit 3 is connected with the input end of the output level limiting unit 4, and the level The limiting unit 4 is used for limiting the voltage amplitude of the level signal passing through the level converting unit 3 to a set value and outputting the output signal. With the goal of being able to start the end-killing effect test system of light weapons, the set value can be +5V.

Preferably, there are four level conversion units 3, which are a first level conversion circuit, a second level conversion circuit, a third level conversion circuit, and a fourth level conversion circuit. The first level conversion circuit , The second level conversion circuit, the third level conversion circuit and the fourth level conversion circuit are independent of each other, and the first level conversion circuit is used for the output signal of the photoelectric speed measuring target 1 whose output level signal is +1.2V. Level conversion, the second level conversion circuit is used to perform level conversion on the output signal of the photoelectric speed measuring target 1 whose output level signal is -9V, and the third level conversion circuit is used for the output level signal of +5V. The output signal of the photoelectric speed-measuring target 1 is level-converted, and the fourth level-conversion circuit is used for level-converting the output signal of the photoelectric speed-measuring target 1 whose output level signal is +13V.

The channel switching unit 2 switches the level signal output by the photoelectric speed measuring target 1 to the trigger circuit to a different level conversion unit 2 according to the difference of the photoelectric speed measuring target 1 used, so as to realize the output of the photoelectric speed measuring target 1 of different types. The level signal performs corresponding level conversion. The circuit of this unit is mainly composed of TLP521 photoelectric coupling switch and G6E-134P relay and other devices. The function of TLP521 photoelectric coupling switch is to realize the electrical isolation of control signal and level signal output by photoelectric speed measuring target. The function of the G6E-134P relay is to switch the level signal output by the photoelectric speed measuring target 1 to the corresponding level conversion circuit. Specifically, the relay is provided with a first relay, a second relay, a third relay and a fourth relay. The output end of the photoelectric speed measuring target 1 is connected with the first level conversion circuit through the first relay, the output end of the photoelectric speed measuring target 1 is also connected with the second level conversion circuit through the second relay, and the output end of the photoelectric speed measuring target 1 is also connected through the first level conversion circuit. The three relays are connected with the third level conversion circuit, and the output end of the photoelectric speed measuring target 1 is also connected with the fourth level conversion circuit through the fourth relay.

The function of the level conversion unit 2 is to convert different types of level signals. There are four different types of commonly used photoelectric speed measuring targets 1, and there are also four different types of output level signals. Among them, the level signal with a small level amplitude will first be judged by the level amplitude verification unit to determine whether it is a valid level signal, and then converted into a level signal with a large level amplitude; the level is a negative value The level signal will be converted into a positive level signal through the rectifier bridge; the level signal with a level signal of +5V is isolated by the voltage follower and its driving capability is improved; the level signal with a larger level amplitude It will be electrically isolated and converted to a +5V level signal through a photocoupler switch. The working principle of the level conversion unit 2 is as follows:

The first level conversion circuit includes a level amplitude verification unit and a voltage amplifying unit. The level amplitude verification unit is used to detect the validity of the output level signal of the photoelectric speed measuring target, and the voltage amplification unit is used to perform the valid level signal. enlarge. The level and amplitude verification unit can be a voltage comparator, and the two input ends of the voltage comparator are respectively connected with the output end of the photoelectric speed measuring target and the reference voltage, the reference voltage is a preset voltage, and the level signal output by the photoelectric speed measuring target is greater than When the reference voltage is used, it indicates that the level signal is valid.

The second level conversion circuit includes a rectifier bridge and a first photoelectric coupling switch. The input end of the rectifier bridge is connected to the output end of the photoelectric speed measuring target, and the output end of the rectifier bridge is connected to the input end of the first photoelectric coupling switch. The output end of the photoelectric coupling switch is connected with the output level defining unit.

The third level conversion circuit includes a voltage follower, the input end of the voltage follower is connected with the output end of the photoelectric speed measuring target, and the output end of the voltage follower is connected with the output level defining unit.

The fourth level conversion circuit includes a second photoelectric coupling switch, the input end of the second photoelectric coupling switch is connected with the output end of the photoelectric speed measuring target, and the output end of the second photoelectric coupling switch is connected with the output level defining unit.

The trigger circuit also includes a controller and a power supply unit 5, the controller is used to control the opening and closing of the relay, and the controller is also used to control the voltage follower to follow the level signal output by the photoelectric speed measuring target. The chip of the controller is LM358, its working power supply is +12V DC power supply, and the output voltage of the trigger circuit is +5V DC voltage. The function of the power supply unit 5 is to provide the working power supply for the chip in the trigger circuit and the output voltage of the trigger circuit. , therefore, the power supply unit is a power supply that provides +12V and +5V DC voltage.

The trigger circuit provided by the invention is a trigger circuit suitable for a variety of different level signals, and for the existing multiple different types of photoelectric speed measuring targets in the shooting range, a set of trigger circuits is realized to adapt to the output levels of four different types of photoelectric speed measuring targets. The function of the signal reduces the consumption of designing trigger circuits for different types of photoelectric speed targets, avoids the need to replace different trigger circuits and data acquisition systems for different photoelectric speed targets before testing, and improves the end-kill effect test of light weapons. efficiency. Moreover, the level signal output by the trigger circuit provided by the present invention has stable amplitude and strong driving ability, which can ensure the start-up of the end-killing effect test system for light weapons. The test equipment is working properly.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; meanwhile, for those skilled in the art, according to the present invention There will be changes in the specific implementation and application scope. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (3)

1. a trigger circuit, it is characterised in that the trigger circuit is applied in the light weapon end point killing effect test system, for receiving the level signal of the photoelectric speed target output, and according to the level signal start the light weapon end point killing and killing The effect testing system, the trigger circuit includes: a channel switching unit, a level conversion unit and an output level defining unit, the level conversion units are multiple, and the channel switching unit is used for according to the type of the photoelectric speed measuring target , the level signal is input to the corresponding level conversion unit, the output end of the level conversion unit is connected with the input end of the output level definition unit, and the level definition unit is used to The voltage amplitude of the level signal of the level conversion unit is limited to a set value and output, and the output signal of the level limiting unit is a trigger signal for starting the end-killing effect test system of the light weapon; Wherein, the level conversion unit includes a first level conversion circuit, a second level conversion circuit, a third level conversion circuit and a fourth level conversion circuit, the first level conversion circuit, the second level conversion circuit The conversion circuit, the third level conversion circuit and the fourth level conversion circuit are independent of each other, and the first level conversion circuit is used to perform level conversion on the output signal of the photoelectric speed measuring target whose output level signal is +1.2V, The second level conversion circuit is used for level conversion of the output signal of the photoelectric speed measuring target whose output level signal is -9V, and the third level conversion circuit is used for the output level signal of the photoelectric speed measuring target of +5V. The output signal of the speed measuring target is level-converted, and the fourth level-conversion circuit is used for level-converting the output signal of the photoelectric speed measuring target whose output level signal is +13V; The channel switching unit includes a first relay, a second relay, a third relay and a fourth relay, and the output end of the photoelectric speed measuring target is connected to the first level conversion circuit through the first relay, and the photoelectric The output end of the speed measuring target is also connected with the second level conversion circuit through the second relay, and the output end of the photoelectric speed measuring target is also connected with the third level conversion circuit through the third relay, so the The output end of the photoelectric speed measuring target is also connected with the fourth level conversion circuit through the fourth relay; The first level conversion circuit includes a level amplitude verification unit and a voltage amplification unit, the level amplitude verification unit is used to detect the validity of the output level signal of the photoelectric speed measuring target, and the voltage amplification unit is used to The effective level signal is amplified; the level amplitude verification unit includes a voltage comparator, and the two input ends of the voltage comparator are respectively connected with the output end of the photoelectric speed measuring target and the reference voltage, so The reference voltage is a preset voltage, and when the level signal output by the photoelectric speed measuring target is greater than the reference voltage, it indicates that the level signal is valid; The second level conversion circuit includes a rectifier bridge and a first photoelectric coupling switch, the input end of the rectifier bridge is connected with the output end of the photoelectric speed measuring target, and the output end of the rectifier bridge is connected with the first photoelectric The input end of the coupling switch is connected, and the output end of the first photoelectric coupling switch is connected with the output level defining unit; The third level conversion circuit includes a voltage follower, the input end of the voltage follower is connected with the output end of the photoelectric speed measuring target, and the output end of the voltage follower is in phase with the output level defining unit. connect; The fourth level conversion circuit includes a second photoelectric coupling switch, the input end of the second photoelectric coupling switch is connected with the output end of the photoelectric speed measuring target, and the output end of the second photoelectric coupling switch is connected with the The output level limiting unit is connected. 2 . The trigger circuit according to claim 1 , wherein the trigger circuit further comprises a controller, the controller is used to control the opening and closing of the relay, and the controller is also used to control the voltage follower pair 2 . The level signal output by the photoelectric speed measuring target is followed. 3 . The trigger circuit according to claim 2 , wherein the trigger circuit further comprises a power supply unit, and the power supply unit supplies power to the trigger circuit and the controller. 4 .

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