CN108100303B

CN108100303B - Insurance detection circuit

Info

Publication number: CN108100303B
Application number: CN201711382725.1A
Authority: CN
Inventors: 石云陆
Original assignee: Guizhou Aerospace Electronic Technology Co Ltd
Current assignee: Guizhou Aerospace Electronic Technology Co Ltd
Priority date: 2017-12-20
Filing date: 2017-12-20
Publication date: 2021-06-29
Anticipated expiration: 2037-12-20
Also published as: CN108100303A

Abstract

The invention provides a safety detection circuit; a circuit between the initial state inspection input end and the initial state inspection output end is sequentially connected with normally closed contacts of a microswitch S1, a microswitch S2, a microswitch S4 and a microswitch S3 in series to form an initial state inspection circuit, and the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 are all double-position switches; the telemetering power supply input end is directly connected with the telemetering signal output end, and four branches are respectively connected with normally open contacts of the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 and then grounded to form a telemetering signal circuit. The invention solves the problems of initial state detection in the miniaturization design of the safety mechanism and the detection of the telemetering signal during the action of flying, simplifies the design of the detection circuit, reduces the using quantity of components and parts, reduces the cost of the detection circuit, can detect the state of the device by using common portable equipment, and is suitable for the development requirements of the miniaturization design of aircrafts and other aerospace products.

Description

Insurance detection circuit

Technical Field

The invention relates to a fuse detection circuit.

Background

The action execution component is an important component of the aircraft and is widely applied to aerospace products, the safety mechanism is the core of the action execution component and is used for ensuring that the aircraft is in a safety state before being stored, transported and subjected to duty processing in a safety state and being transmitted and entering the action execution range of the aircraft, primary safety relief and secondary safety relief cannot be performed accidentally, after primary safety relief and secondary safety relief signals are received, the primary safety relief and the secondary safety relief are performed successively, the device is in a standby action state, and the action component or other component input signals in the aircraft can be reliably acted after being received. The action execution component needs to detect the initial state of the product in order to detect whether various components in the product are in normal states or not in the service processing, and needs to detect the actions of various components in the action execution component by using a telemetering signal in the process of transmitting flight so as to detect whether the components in the action execution component work normally or not, so that the insurance detection circuit is an essential part of the action execution component. Traditional insurance detection circuit design is complicated, and components and parts use more, need occupy great space, are difficult to satisfy the demand of the miniaturized design of product, and need use the equipment of special system to detect, the test of the product of being not convenient for detects.

Specifically, the method comprises the following steps:

1) the traditional detection circuit has complex design, larger components, higher cost and complex detection program;

2) the product state needs to be detected by using more complex special equipment, which is inconvenient for product test and detection;

3) the detection circuit occupies a large space in the design, and the requirement of product miniaturization design is difficult to meet.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a fuse detection circuit, which aims to solve the problems of initial state detection in the miniaturized design of a fuse mechanism and the detection of a telemetering signal during the action in the flight process, simplify the design of the detection circuit, reduce the number of components and reduce the cost of the detection circuit, and can detect the state of the device by using common portable equipment.

The invention is realized by the following technical scheme.

The invention provides a safety detection circuit; a circuit between the initial state inspection input end and the initial state inspection output end is sequentially connected with normally closed contacts of a microswitch S1, a microswitch S2, a microswitch S4 and a microswitch S3 in series to form an initial state inspection circuit, and the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 are all double-position switches; the telemetering power supply input end is directly connected with the telemetering signal output end, and four branches are respectively connected with normally open contacts of the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 and then grounded to form a telemetering signal circuit.

The microswitch S1 and the microswitch S3 are driven by the inertia sliding block to switch the open and close states.

And the microswitch S2 and the microswitch S4 are driven by the explosion-proof slide block to switch the on-off state.

And the telemetering power supply input end of the telemetering signal circuit is connected with a current-limiting resistor R.

In the telemetering signal circuit, a voltage dividing resistor R1, a voltage dividing resistor R1, a voltage dividing resistor R4 and a voltage dividing resistor R3 are respectively connected in series on four branches corresponding to the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3.

The resistance values of the voltage dividing resistor R1, the voltage dividing resistor R1, the voltage dividing resistor R4 and the voltage dividing resistor R3 are all different.

The telemetry signal input end supplies 5V power.

The microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 are the same in model and specification.

The invention has the beneficial effects that: the problem of the detection of initial state when detecting and flying the action during the kind in the miniaturized design of insurance mechanism telemetering measurement signal is solved, simplify detection circuitry's design, reduce components and parts quantity of use, reduce detection circuitry's cost, use ordinary portable equipment just can detect the state of this device, adapt to the development demand of aircraft and other aerospace product miniaturized designs.

Drawings

Fig. 1 is a schematic diagram of the connection of the present invention.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

The fuse detection circuit shown in fig. 1 mainly comprises micro switches S1, S2, S3 and S4, resistors R, R1, R2, R3, R4, input and output terminals, and the like.

The initial state checking circuit comprises S1, S2, S3, S4 and an input end and an output end of the initial state checking circuit, four microswitches with the same specification and model are designed, the microswitches are all double-position switches, the initial state checking circuit comprises two inertia sliding block microswitches (S1 and S3) and normally closed contacts of two flame-proof sliding block microswitches (S2 and S4) which are connected in series, the two microswitches are in a normally closed state, when the safety mechanism is in a safety state, the initial state checking circuit is in a conducting state, voltage and high level are input, and the voltage and the high level are output. If the initial state checking circuit is in the off state, it indicates that at least one of the switches S1, S2, S3, S4 is switched, and the safety mechanism is failed.

The telemetering signal circuit is composed of micro switches S1, S2, S3 and S4, resistors R, R1, R2, R3 and R4 and an input end and an output end of the telemetering circuit, a second group of switches of the micro switches are used in the circuit and connected in parallel, voltage dividing resistors R1 and R2 are designed at the rear end of the inertia slider micro switch, voltage dividing resistors R3 and R4 are designed at the rear end of the explosion-proof slider micro switch, and voltage division of telemetering signal input is achieved through different resistance values of the resistors R1, R2, R3 and R4. When the two subsystems work normally, the inertia sliding blocks 1 and 2 move to stop, primary mechanical constraints on the explosion-proof sliding blocks 1 and 2 are respectively removed, at the moment, the first group of switches of the inertia sliding block micro switches S1 and S3 are disconnected, when the second group of switches are closed, the output voltage of the telemetering signal output end is V1-3, when the explosion-proof sliding blocks 1 and 2 slide to stop, the first group of switches of the explosion-proof sliding block micro switches S2 and S4 are disconnected, the second group of switches are closed, and the output voltage of the telemetering signal output end is V2-4. If only one subsystem works normally, the first group of normally working micro switches in the four micro switches S1, S2, S3 and S4 are switched off, and when the second group of switches are switched off, the output ends of the telemetering signals output different voltages respectively. Whether the inertia sliding block and the explosion-proof sliding block normally act or not is judged by outputting different telemetering signals (namely voltage values).

Thus, the present invention:

1) the safety state can be detected through the conductivity of the series circuit, a voltage dividing resistor is designed to divide voltage, whether the inertia sliding block and the explosion-proof sliding block normally act or not is judged according to different output telemetering signals (namely voltage values), and whether the inertia sliding block and the explosion-proof sliding block normally act or not is detected;

2) only a microswitch and a resistor device are used, the circuit is simple, the microswitch carries out mechanical conversion according to the mechanical motion of the inertia sliding block and the explosion-proof sliding block, the action conditions of the inertia sliding block and the explosion-proof sliding block are directly reflected, and the reliability is high;

3) can be installed in narrow and small space and different positions according to the structural characteristics of the safety mechanism, and is convenient for the miniaturization design of the safety mechanism.

Claims

1. A safing detection circuit, comprising: a circuit between the initial state inspection input end and the initial state inspection output end is sequentially connected with normally closed contacts of a microswitch S1, a microswitch S2, a microswitch S4 and a microswitch S3 in series to form an initial state inspection circuit, and the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 are all double-position switches; the telemetering power supply input end is directly connected with the telemetering signal output end, and four branches are respectively connected with normally open contacts of the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 and then grounded to form a telemetering signal circuit; on the telemetering signal circuit, the telemetering power supply input end is connected with a current-limiting resistor R; in the telemetering signal circuit, a voltage dividing resistor R1, a voltage dividing resistor R1, a voltage dividing resistor R4 and a voltage dividing resistor R3 are respectively connected in series on four branches corresponding to the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3.

2. The safing detection circuit according to claim 1, wherein: the microswitch S1 and the microswitch S3 are driven by the inertia sliding block to switch the open and close states.

3. The safing detection circuit according to claim 1, wherein: and the microswitch S2 and the microswitch S4 are driven by the explosion-proof slide block to switch the on-off state.

4. The safing detection circuit according to claim 1, wherein: the resistance values of the voltage dividing resistor R1, the voltage dividing resistor R1, the voltage dividing resistor R4 and the voltage dividing resistor R3 are all different.

5. The safing detection circuit according to claim 1, wherein: the telemetry power supply input end supplies 5V power.

6. The safing detection circuit according to claim 1, wherein: the microswitch S1, the microswitch S2, the microswitch S4 and the microswitch S3 are the same in model and specification.