CN109341411B - Trigger circuit - Google Patents
Trigger circuit Download PDFInfo
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- CN109341411B CN109341411B CN201811099485.9A CN201811099485A CN109341411B CN 109341411 B CN109341411 B CN 109341411B CN 201811099485 A CN201811099485 A CN 201811099485A CN 109341411 B CN109341411 B CN 109341411B
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- level
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- speed measuring
- photoelectric
- level conversion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A31/00—Testing arrangements
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- General Engineering & Computer Science (AREA)
- Electronic Switches (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The invention discloses a trigger circuit. The trigger circuit includes: the system comprises a plurality of channel switching units, a plurality of level conversion units and an output level limiting unit, wherein the channel switching units are used for inputting level signals to the corresponding level conversion units according to the types of photoelectric speed measuring targets, the output ends of the level conversion units are connected with the input ends of the output level limiting units, the level limiting units are used for limiting the voltage amplitude of the level signals passing through the level conversion units to a set value and outputting the voltage amplitude, and the output signals of the level limiting units are trigger signals for starting a light weapon terminal killing effect testing system. The trigger circuit provided by the invention is suitable for level signals output by various photoelectric speed measuring targets of different types, and has the characteristics of wide application range and high efficiency.
Description
Technical Field
The present invention relates to the field of triggering, and in particular, to a trigger circuit.
Background
The end-point killing effect of the light weapon is an important technical index for evaluating the killing performance of the light weapon, and related testing work is required in each link of design, development, modification, sizing and the like of the light weapon, while the end-point killing effect test of the light weapon has to be tested under the condition of known projectile firing speed to be meaningful. Through the development of many years, a target range can purchase a new photoelectric speed measuring target every five to six years so as to keep and even improve the testing precision of the projectile shooting speed. The firearms end-point killing effect test system usually uses the level signal output by the photoelectric speed measuring target as the trigger signal for starting the firearms end-point killing effect test system. For many years, the types of photoelectric speed measuring targets purchased in a target range are different, level signals output by the photoelectric speed measuring targets are different according to different test items, and a trigger circuit configured for the photoelectric speed measuring targets of different types has a single structure, can only respond to a certain corresponding fixed level signal, and cannot respond to the level signals output by the photoelectric speed measuring targets of other types, so that the corresponding trigger circuits and data acquisition systems need to be respectively configured for the photoelectric speed measuring targets of different types, the trigger circuits and the data acquisition systems need to be frequently replaced before testing, and the waste of manpower and resources is caused.
Moreover, in the test system, if the trigger circuit is not matched with the photoelectric speed measurement target, the amplitude of the level signal output by the photoelectric speed measurement target is possibly far larger than the amplitude of the level signal which can be received by the trigger circuit, so that the trigger circuit is damaged; if the trigger circuit is not matched with the data acquisition system, the amplitude of the level signal output by the trigger circuit is possibly far larger than the amplitude of the starting level signal of the data acquisition system, so that the data acquisition system is damaged and cannot work normally.
Disclosure of Invention
The invention aims to provide a trigger circuit which is suitable for level signals output by photoelectric speed measuring targets of various different types and has the characteristics of wide application range and high efficiency.
In order to achieve the purpose, the invention provides the following scheme:
a trigger circuit for use in a firearm end-point killing effect testing system for receiving a level signal output by an optoelectronic speed probe and initiating the firearm end-point killing effect testing system based on the level signal, the trigger circuit comprising: the system comprises a plurality of channel switching units, a level conversion unit and an output level limiting unit, wherein the plurality of level conversion units are used for inputting the level signals to the corresponding level conversion units according to the types of the photoelectric speed measuring targets, the output end of the level conversion unit is connected with the input end of the output level limiting unit, the level limiting unit is used for limiting the voltage amplitude of the level signals passing through the level conversion units at a set value and outputting the voltage amplitude, and the output signal of the level limiting unit is a trigger signal for starting the light weapon terminal killing effect testing system.
Optionally, the level shift unit includes a first level shift circuit, a second level shift circuit, a third level shift circuit and a fourth level shift circuit, the first level shift circuit, the second level shift circuit, the third level shift circuit and the fourth level shift circuit are independent, the first level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of +1.2V, the second level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of-9V, the third level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of +5V, and the fourth level conversion circuit is used for performing level conversion on the output signal of the photoelectric speed measuring target with the output level signal of + 13V.
Optionally, the channel switching unit includes a first relay, a second relay, a third relay and a fourth relay, the output end of the photoelectric speed measurement target is connected with the first level conversion circuit through the first relay, the output end of the photoelectric speed measurement target is connected with the second level conversion circuit through the second relay, the output end of the photoelectric speed measurement target is connected with the third level conversion circuit through the third relay, and the output end of the photoelectric speed measurement target is connected with the fourth level conversion circuit through the fourth relay.
Optionally, the first level shift circuit includes a level amplitude verification unit and a voltage amplification unit, the level amplitude verification unit is configured to detect validity of a level signal output by the photoelectric speed measurement target, and the voltage amplification unit is configured to amplify the valid level signal.
Optionally, the level amplitude verification unit includes a voltage comparator, two input ends of the voltage comparator are respectively connected to the output end of the photoelectric speed measurement target and the reference voltage, the reference voltage is a preset voltage, and when the level signal output by the photoelectric speed measurement 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, an input end of the rectifier bridge is connected to an output end of the photoelectric speed measurement target, an output end of the rectifier bridge is connected to an input end of the first photoelectric coupling switch, and an output end of the first photoelectric coupling switch is connected to the output level limiting unit.
Optionally, the third level shift circuit includes a voltage follower, an input end of the voltage follower is connected to an output end of the optoelectronic speed measuring target, and an output end of the voltage follower is connected to the output level limiting unit.
Optionally, the fourth level conversion circuit includes a second photoelectric coupling switch, an input end of the second photoelectric coupling switch is connected to an output end of the photoelectric speed measurement target, and an output end of the second photoelectric coupling switch is connected to the output level limiting unit.
Optionally, the trigger circuit further includes a controller, the controller is configured to control the opening and closing of the relay, and the controller is further configured to control the voltage follower to follow the level signal output by the photoelectric speed measurement 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 invention, the invention discloses the following technical effects: the trigger circuit provided by the invention comprises: the system comprises a plurality of channel switching units, a plurality of level conversion units and an output level limiting unit, wherein the channel switching units are used for inputting level signals to the corresponding level conversion units according to the types of photoelectric speed measuring targets, the output ends of the level conversion units are connected with the input ends of the output level limiting units, the level limiting units are used for limiting the voltage amplitude of the level signals passing through the level conversion units to a set value and outputting the voltage amplitude, and the output signals of the level limiting units are trigger signals for starting a light weapon terminal killing effect testing system. According to the invention, the plurality of level conversion units are arranged according to different types of photoelectric speed measuring targets, so that the output level signals of the photoelectric speed measuring targets can be responded, trigger circuits do not need to be designed for the photoelectric speed measuring targets of different types respectively, the link of replacing different trigger circuits and data acquisition systems for the photoelectric speed measuring targets before testing is avoided, and the efficiency of the end-point killing effect testing of the light weapon is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a firearm end-point killing effect testing system;
FIG. 2 is a block diagram of a flip-flop circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a trigger circuit which is suitable for level signals output by photoelectric speed measuring targets of various different types and has the characteristics of wide application range and high efficiency.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a light weapon terminal killing effect test system, and as shown in fig. 1, the trigger circuit provided by the present invention is applied to the light weapon terminal killing effect test system, and is configured to receive a level signal output by an optoelectronic velocity-measuring target, and start the light weapon terminal killing effect test system according to the level signal.
Fig. 2 is a block diagram of a trigger circuit according to an embodiment of the present invention, and as shown in fig. 2, the trigger circuit includes: the device comprises a plurality of channel switching units 2, a level conversion unit 3 and an output level limiting unit 4, wherein the channel switching units 2 are used for inputting level signals to the corresponding level conversion units 3 according to the types of the photoelectric speed measuring targets 1, the output end of the level conversion unit 3 is connected with the input end of the output level limiting unit 4, the level limiting unit 4 is used for limiting the voltage amplitude of the level signals passing through the level conversion unit 3 to a set value and outputting the voltage amplitude, and the output signal of the level limiting unit 4 is a trigger signal for starting a light weapon end-point killing effect testing system. The target is to start the light weapon end-point killing effect test system, and the set value can be + 5V.
Preferably, the level shift units 3 may be provided in four, which are a first level shift circuit, a second level shift circuit, a third level shift circuit and a fourth level shift circuit, respectively, a first level shift circuit, the second level conversion circuit, the third level conversion circuit and the fourth level conversion circuit are independent of each other, the first level conversion circuit is used for carrying out level conversion on an output signal of the photoelectric speed measuring target 1 with an output level signal of +1.2V, the second level conversion circuit is used for carrying out level conversion on an output signal of the photoelectric speed measuring target 1 with an output level signal of-9V, the third level conversion circuit is used for carrying out level conversion on an output signal of the photoelectric speed measuring target 1 with an output level signal of +5V, and the fourth level conversion circuit is used for carrying out level conversion on an output signal of the photoelectric speed measuring target 1 with an output level signal of + 13V.
The channel switching unit 2 switches the level signals output from the photoelectric speed measuring target 1 to the trigger circuit to different level conversion units 2 according to the difference of the used photoelectric speed measuring targets 1, so as to realize corresponding level conversion of the level signals output from the photoelectric speed measuring targets 1 of different types. The circuit of the unit mainly comprises a TLP521 photoelectric coupling switch, a G6E-134P relay and other devices, and the TLP521 photoelectric coupling switch is used for realizing the electrical isolation of a control signal and a level signal output by the photoelectric speed measuring target. The G6E-134P relay is used for switching the level signal output by the photoelectric speed measuring target 1 into a corresponding level conversion circuit, and specifically comprises the following steps: the relay is provided with first relay, second relay, third relay and fourth relay, and the 1 output of photoelectric speed measuring target is connected with first level conversion circuit through first relay, and the 1 output of photoelectric speed measuring target still is connected with second level conversion circuit through the second relay, and the 1 output of photoelectric speed measuring target still is connected with third level conversion circuit through the third relay, and the 1 output of photoelectric speed measuring target still is connected with fourth level conversion circuit through the fourth relay.
The level shifting unit 2 functions to shift different types of level signals. The photoelectric speed measuring target 1 has four different types, and the level signal output by the photoelectric speed measuring target has four different types. The level signal with small level amplitude is firstly judged to be an effective level signal by a level amplitude verification unit and then converted into a level signal with large level amplitude; the level signal with the negative level is converted into a positive level signal through the rectifier bridge; the level signal with the level signal of +5V is isolated through a voltage follower and the driving capability of the level signal is improved; the level signal with larger level amplitude is electrically isolated by the photoelectric coupling switch and converted into a +5V level signal. The operation principle of the level conversion unit 2 is as follows:
the first level conversion circuit comprises a level amplitude verification unit and a voltage amplification unit, the level amplitude verification unit is used for detecting the validity of the level signal output by the photoelectric speed measurement target, and the voltage amplification unit is used for amplifying the valid level signal. The level amplitude verification unit can be a voltage comparator, two input ends of the voltage comparator are respectively connected with the output end of the photoelectric speed measuring target and a reference voltage, the reference voltage is a preset voltage, and when a level signal output by the photoelectric speed measuring target is greater than the reference voltage, the level signal is indicated to be effective.
The second level switching circuit comprises 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, the output end of the rectifier bridge is connected with the input end of the first photoelectric coupling switch, and the output end of the first photoelectric coupling switch is connected with the output level limiting unit.
The third level conversion circuit comprises 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 limiting unit.
The fourth level switching circuit comprises 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 limiting unit.
The trigger circuit further comprises a controller and a power supply unit 5, the controller is used for controlling the opening and closing of the relay, and the controller is also used for controlling 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, 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 and provide the output voltage of the trigger circuit for the chip in the trigger circuit, therefore, the power supply unit is the power supply providing +12V and +5V DC voltage.
The trigger circuit provided by the invention is suitable for trigger circuits of various level signals, realizes the function that one set of trigger circuit is suitable for level signals output by four different types of photoelectric speed measuring targets aiming at a plurality of different types of photoelectric speed measuring targets existing in a target range, reduces the consumption of respectively designing the trigger circuits aiming at the different types of photoelectric speed measuring targets, avoids the link of replacing different trigger circuits and data acquisition systems for the different photoelectric speed measuring targets before testing, and improves the efficiency of the light weapon terminal killing effect test. Moreover, the level signal output by the trigger circuit provided by the invention has stable amplitude and strong driving capability, can ensure the starting of a light weapon terminal killing effect test system, simultaneously, can not generate the condition of trigger signal overvoltage, and can ensure the normal work of the started test equipment.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (3)
1. A trigger circuit for use in a firearm end-point killer effect test system for receiving a level signal from an optoelectronic speed-measuring target and activating the firearm end-point killer effect test system based on the level signal, the trigger circuit comprising: the system comprises a plurality of channel switching units, a level conversion unit and an output level limiting unit, wherein the channel switching units are used for inputting the level signals to the corresponding level conversion units according to the types of the photoelectric speed measuring targets, the output ends of the level conversion units are connected with the input ends of the output level limiting units, the level limiting unit is used for limiting the voltage amplitude of the level signals passing through the level conversion units at a set value and outputting the voltage amplitude, and the output signals of the level limiting units are trigger signals for starting the light weapon terminal killing effect testing system;
wherein the level shift unit includes a first level shift circuit, a second level shift circuit, a third level shift circuit, and a fourth level shift circuit, the first level shift circuit, the second level shift circuit, the third level shift circuit and the fourth level shift circuit are independent, the first level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of +1.2V, the second level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of-9V, the third level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of +5V, the fourth level conversion circuit is used for carrying out level conversion on the output signal of the photoelectric speed measuring target with the output level signal of + 13V;
the channel switching unit comprises a first relay, a second relay, a third relay and a fourth relay, the output end of the photoelectric speed measuring target is connected with the first level conversion circuit through the first relay, the output end of the photoelectric speed measuring target is also connected with the second level conversion circuit through the second relay, the output end of the photoelectric speed measuring target is also connected with the third level conversion circuit through the third relay, and 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 comprises a level amplitude verification unit and a voltage amplification unit, the level amplitude verification unit is used for detecting the effectiveness of a level signal output by the photoelectric speed measurement target, and the voltage amplification unit is used for amplifying the effective level signal; the level amplitude verification unit comprises a voltage comparator, two input ends of the voltage comparator are respectively connected with the output end of the photoelectric speed measuring target and a reference voltage, the reference voltage is a preset voltage, and when a level signal output by the photoelectric speed measuring target is greater than the reference voltage, the level signal is indicated to be effective;
the second level conversion circuit comprises 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, the output end of the rectifier bridge is connected with the input end of the first photoelectric coupling switch, and the output end of the first photoelectric coupling switch is connected with the output level limiting unit;
the third level conversion circuit comprises 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 limiting unit;
the fourth level switching circuit comprises 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 limiting unit.
2. The trigger circuit according to claim 1, further comprising a controller, wherein the controller is configured to control the opening and closing of the relay, and the controller is further configured to control the voltage follower to follow the level signal output by the optoelectronic speed measurement target.
3. The trigger circuit of claim 2, further comprising a power supply unit that supplies power to the trigger circuit and the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099485.9A CN109341411B (en) | 2018-09-20 | 2018-09-20 | Trigger circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099485.9A CN109341411B (en) | 2018-09-20 | 2018-09-20 | Trigger circuit |
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| CN109341411A CN109341411A (en) | 2019-02-15 |
| CN109341411B true CN109341411B (en) | 2020-12-11 |
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| CN201811099485.9A Expired - Fee Related CN109341411B (en) | 2018-09-20 | 2018-09-20 | Trigger circuit |
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