CN208699062U - Flight instruments - Google Patents

Abstract

The utility model relates to vehicle technology field more particularly to a kind of flight instruments.The flight instruments include: Flight main body, and the Flight main body includes metal shell, the circuit board in the metal shell, and the reference ground of the metal shell and the circuit board is electrically connected.The charge incuded on metal shell can be dredged in reference ground by flight instruments provided by the utility model, reduce the potential of metal shell, the charge inducing on metal shell is avoided to have an adverse effect the sensitivity of circuit in metal shell and precision.

Description

Flight instruments

Technical field

The utility model relates to vehicle technology fields, specifically, the utility model relates to a kind of flight instruments.

Background technique

The dynamical system of many power equipments uses high frequency electric source, this high frequency electric source can emit a large amount of high-frequency electrical to surrounding Magnetic wave, the host of the power equipment mostly use greatly metal shell, prevent frequency electromagnetic waves toward external diffusion whereby, but be blocked Frequency electromagnetic waves can stored charge on the shell, frequency electromagnetic waves on the shell stored charge for a period of time after, shell can generate Induced electricity other than the human body of touching can be made to generate the feeling of electric shock is also easy to that the integrated circuit of dynamical system or CPU is caused to burn It ruins.

It, can be using the method that is directly grounded by shell if the power equipment that can be directly grounded, such as refrigerator, washing machine The charge of upper accumulation discharges, but some power equipments cannot or can not be using the method being directly grounded, such as aircraft, just It is often in high dummy status when work, can not be directly grounded, not can avoid and add up charge on metal shell, the electricity that a large amount of charges are formed Field generates interference to the highly sensitive circuit in metal shell, influences its sensitivity and accuracy.

Summary of the invention

The purpose of this utility model aims to solve at least one of above-mentioned technological deficiency, and especially flight instruments are in high altitude operation How the charge problem that metal shell on accumulates is discharged under state.

The utility model provides a kind of flight instruments, including Flight main body, and the Flight main body includes metal shell, sets The reference ground of circuit board in the metal shell, the metal shell and the circuit board is electrically connected.

Preferably, the Flight main body further include: the electricity for being dredged the charge inducing on the metal shell Hold, one end of the capacitor and the metal shell are electrically connected, and the reference ground of the other end and the circuit board is electrically connected.

Preferably, the capacitor includes multiple, and multiple capacitors carry out serial or parallel connection.

Preferably, the range of the capacitance is 0.5uf -10uf.

Preferably, the circuit board includes multiple, and multiple circuit boards are in parallel.

Preferably, the circuit board includes multiple, and each circuit board is connected with the electricity close to one end of metal shell Hold.

Specifically, it is additionally provided on the metal shell inner wall for connecting the conducting connecting part with reference to ground.

Specifically, the conducting connecting part includes at least one of metal screws, metal bump, metal bolts.

Specifically, the Flight main body further includes power supply module, and the power supply module can be to the function in the circuit board Rate circuit and/or analog circuit power supply.

The utility model embodiment is by the way that metal shell to be connected with the reference on circuit board, by the sense on metal shell It answers charge to dredge in reference ground, reduces the potential of metal shell, avoid the circuit as caused by metal shell stored charge clever The influence of sensitivity and precision.

The utility model embodiment can be effectively removed outside metal by adding capacitor between metal shell and circuit board High frequency spurs and Electromagnetic Interference signal on shell, the ability for making entire flight instruments have electromagnetism interference effectively eliminate biography Lead transmitting and radiation-emitting interference.

The purpose of this utility model is to provide for a kind of hardware configuration different from the prior art, enables a technician to Further exploitation is realized under such hardware configuration.

The additional aspect of the utility model and advantage will be set forth in part in the description, these will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will Become obvious and be readily appreciated that, in which:

Fig. 1 is a kind of structural schematic diagram for the flight instruments that embodiment provides of the utility model；

Fig. 2 is a kind of structural schematic diagram for the flight instruments that embodiment provides of the utility model, and emphasis shows the gold Belong to and is equipped with capacitor between shell and reference ground；

Flight when being power circuit that Fig. 3 is a kind of providing of providing of embodiment of the utility model circuit board with reference to ground The structural schematic diagram of device；

Fig. 4 is a kind of structural schematic diagram for the flight instruments that embodiment provides of the utility model, and emphasis shows multiple capacitors Series connection is for adjusting integral capacitor value；

Fig. 5 is a kind of structural schematic diagram for the flight instruments that embodiment provides of the utility model, and emphasis shows multiple circuits It is in parallel between plate to constitute emergency bypass；

Fig. 6 is a kind of structural schematic diagram for the flight instruments that embodiment provides of the utility model, and emphasis shows multiple circuits Plate constitutes emergency bypass together with capacitor；

Fig. 7 is a kind of structural schematic diagram for the unmanned plane that embodiment provides of the utility model.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and cannot be construed to the utility model Limitation.

Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being used in the specification of the utility model Wording " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or Add other one or more features, integer, step, operation, element, component and/or their group.It should be understood that working as us Element is claimed to be " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or can also be with There are intermediary elements.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.Used here as Wording "and/or" include one or more associated wholes for listing item or any cell and all combinations.

Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in the utility model fields.Also It should be understood that those terms such as defined in the general dictionary, it should be understood that have and the context of the prior art In the consistent meaning of meaning otherwise will not use idealization or too formal and unless by specific definitions as here Meaning is explained.

The utility model provides a kind of flight instruments, in one embodiment, structural schematic diagram as shown in Figure 1, packet Include: Flight main body 100, the Flight main body 100 include:

Metal shell 10, the circuit board 200 in the metal shell 10, the metal shell 10 and the circuit board 200 reference ground 20 is electrically connected.

The metal shell 10 refers to that the electrically conductive shell comprising metal material, entire shell can all be metal materials, The a part for being also possible to shell is metal material, such as: the splicing of metal and other materials, in one embodiment, the gold Belonging to shell 10 includes fuselage cover, rack, and metal shell 10 can also refer to fuselage cover and/or rack is metal material.Work as institute The splicing that metal shell 10 is metal He other non-conductive materials is stated, the part being electrically connected with the reference of circuit board is metal Material, so that charge is transmitted to from metal shell 10 with reference in ground.

The circuit board at work, especially power it is bigger in the case where, power supply can to surrounding emit electromagnetism Wave, induction of the metal shell 10 by internal charge, the charge redistribution in metal shell 10, xenogenesis charge are attracted to gold Belong to 10 inner surface side of shell, like charges are ostracised to far from 10 outer surface side of metal shell, and positive and negative charge is distributed in gold The surfaces externally and internally for belonging to shell 10, forms electric field, the electric field is big with internal electric signal fluctuating range inside metal shell 10 Small difference and there are a variety of different frequencies.

In a kind of embodiment, the circuit board in the metal shell 10 is analog circuit, the power circuit in power device Deng the circuit being equipped with reference to ground.The high sensitivity of the analog circuit is easy the electric field formed by charge on metal shell 10 Influence, the electric field can result in the sensitivity decrease of the analog circuit, causes the failure or maloperation of circuit, cause electricity Magnetic disturbance, or even circuit is caused to can not work normally.

The reference ground of the circuit board is the reference point of zero potential, is the common end for constituting circuit signal circuit.This implementation In example it is preferably described with reference to ground be whole circuit board lowest electric potential at, such as the ground of power circuit.By the metal shell 10 It with reference is electrically connected, the charge on the metal shell 10 is dredged into reference ground, reduce the potential of metal shell 10, Reduce the adverse effect that the electric field formed due to charge accumulated generates the circuit board being set in metal shell 10.

The metal shell 10 is electrically connected with the reference of circuit board, in a kind of embodiment, the metal shell Be additionally provided with capacitor 30 for dredging charge inducing between 10 and the reference ground 20 of circuit board 200, one end of the capacitor 30 with 10 inner surface of metal shell is electrically connected, and the reference ground 20 of the other end and the circuit board 200 is electrically connected, and structure is shown It is intended to as shown in Figure 2.

Capacitor is added in the metal shell and with reference between ground, on the one hand can be avoided since complicated external circumstances make When obtaining DC voltage on metal shell band, the short circuit that metal shell is connected directly the circuit board be easy to causeing with reference is burnt； On the other hand the high-frequency interferencing signal on metal shell can be removed by capacitor, achieve the purpose that eliminate interference.

Ginseng is dredged in metal shell and with reference to the high-frequency interferencing signal that the capacitor added between ground exhales circuit board It examines in ground, the frequency of AC signal and the size of capacitance are in inverse ratio, and the amount of capacity of capacitor has the electric field of different frequency Different impedances, frequency is higher, and charge passes through that the obstruction being subject to when capacitor is smaller, and frequency is lower, when charge passes through capacitor by Obstruction it is bigger.According to the electric field frequency formed on metal shell, in conjunction with the relationship between the electric field frequency and capacitance, really The fixed capacitance.

The calculation formula of the capacitor capacitive reactance are as follows: Xc=1/2 π fC, wherein Xc is capacitor capacitive reactance, and f is signal frequency, and C is Capacitance, when signal frequency is higher, identical capacitance, the capacitive reactance presented is smaller, reaches and direct current signal is hindered to pass through, allow height The purpose that frequency signal passes through.In one embodiment, the range of the capacitance is 0.5uf -10uf, and the capacitance can be with For numerical value such as 0.5uf, 1uf, 2.2uf, 10uf, capacitance can be arranged according to signal frequency, to eliminate the interference letter of the frequency Number.Such as: work as C=0.5uf, when f=1kHz, Xc=318.309 Ω；Work as C=10uf, when f=1kHz, Xc=15.915 Ω；Work as C When=0.5uf, f=100Hz, Xc=3.183k Ω；Work as C=10uf, when f=100Hz, Xc=159.154 Ω.

Found out by above-mentioned formula and calculating data, the product of capacitance and signal frequency and capacitor capacitive reactance are in inverse ratio, identical Under signal frequency, capacitance is bigger, and capacitor capacitive reactance is smaller, i.e. capacitor is smaller to the inhibition of electric current, is conducive to high-frequency signal Pass through.When identical capacitance values, signal frequency is higher, and capacitor capacitive reactance is smaller, i.e. capacitor is smaller to the inhibition of electric current, reaches Allow the purpose that high-frequency signal passes through.

By the way that high frequency spurs and Electromagnetic Interference can be effectively removed in metal shell and with reference to capacitor is added between ground, make Entire flight instruments have the ability of electromagnetism interference, effectively eliminate conducted emission and radiation-emitting interference.

In one embodiment, the circuit board 200 is preferably power circuit 21, further includes power supply in the Flight main body Module, the power supply module 22 is used to provide power for the analog circuit in the power circuit 21 and metal shell 10, described Power supply module can be the power supplys such as battery.One end of the capacitor 30 is connected with metal shell 10, the other end and power circuit 21 Reference ground 20 be electrically connected, one end of the power circuit 21 is connected with capacitor 30, the other end in Flight main body Power supply module 22 is connected, after structural schematic diagram is as shown in figure 3, the capacitance of capacitor is determining, the quantity and connection type of capacitor It is unlimited, it is connected capacitor required for forming the present embodiment in the present embodiment as two capacitors, capacitor and metal shell after series connection 10 are attached by connector, and the connector is used to for separation unit being attached by way of chimeric or be screwed on, and And since the both ends of connector connection will carry out the transfer of charge, so the preferably conductive connector of the connector Such as: metal screws, metal bolts, metal bump connector, when the metal shell 10 and the connection with reference between ground When at only one, the connector can be any of above-mentioned connector, when the metal shell 10 and the reference ground Between when being connected with multiple branches, the connector has multiple, and multiple connectors can be identical or different, such as metal shell 10 and described with reference between ground when being connected with multiple connection branches, the connector of one of branch is metal bolts, another The connector of branch can be metal bump.

The electrical parameter of capacitor changes with electric field frequency, the capacitor to work under high frequency condition, since dielectric constant is in height Small when frequency than low frequency, capacitance accordingly reduces, and loss also increases with the raising of frequency.In addition, in high-frequency work, capacitor Distribution parameter, can all influence the performance of capacitor.Capacitance is by using the load impedance and AC signal of this AC signal Frequency determines.

Since the electric field frequency of formation is changed according to the difference of different stored charges, the capacitor can be used One variable capacitance can also carry out serial or parallel connection using multiple capacitors and form finally determining capacitance, multiple capacitor strings When the whole body capacitance value of joint debugging, structural schematic diagram is as shown in Figure 4.Serial or parallel connection is carried out by variable capacitance or multiple capacitors Mode form the capability value finally needed, can according to electric field frequency variation flexibly change capacitance to cope with different feelings Condition.

In one embodiment, the circuit board includes multiple, and multiple circuit boards are in parallel, it is in parallel after with the metal Shell 10 connects, and it is in order to avoid can not be successfully metal shell when a circuit board breaks down that multiple circuit boards, which are arranged, Charge on 10 is dredged away, and the reliability of the flight instruments is enhanced.

Further, in one embodiment, the circuit board includes multiple, and multiple circuit boards are in parallel, Mei Ge electricity Road plate is emergency bypass, further, the metal shell 10 with it is in parallel after circuit board between be additionally provided with capacitor, the electricity Hold and can be a variable capacitance or multiple capacitors for carrying out serial or parallel connection, when capacitor is one, the flight instruments Structural schematic diagram is as shown in Figure 5.Capacitor, interference of the capacitor to certain frequency are equipped between metal shell 10 and circuit board Signal impedance is very low, and capacitor connects the reference on metal shell 10 and circuit board, so that the potential of metal shell 10 is close Reference level reduces the interference to the sensitive circuit elements being equipped in metal shell 10.

In one embodiment, the circuit board includes multiple, and each circuit board is connected with capacitor, and the capacitor can To be a variable capacitance, it is also possible to multiple capacitors for carrying out serial or parallel connection, each circuit board is connected in series to the capacitor together As emergency bypass, one end of the emergency bypass is connect with metal shell 10, and the other end is connect with power supply module 22, structure Schematic diagram is as shown in Figure 6.

The electrical parameter of capacitor changes with electric field frequency, the capacitor to work under high frequency condition, since dielectric constant is in height Small when frequency than low frequency, capacitance also accordingly reduces, and the raising also with frequency is lost and increases.

In one embodiment, it is additionally provided on the inner wall of the metal shell 10 for connecting in the circuit board with reference to ground Connector, if being additionally provided with capacitor between the metal shell 10 and the circuit board, the connector is also used to connect capacitor, For the ease of the conduction of charge, the connector is metal material that can be conductive, such as metal screws, metal bump, metal spiral shell Bolt etc., metal shell 10 is attached by the connector with the reference on the circuit board, or is connected with capacitor It connects, corresponding to the connector that 10 inner wall of metal shell is equipped with, the one end being attached with the metal shell 10 also is provided with using In the connector of connection, the one end for such as connecting the connecting line of capacitor and metal shell 10 is correspondingly provided with metal nuts, to realize gold Belong to the connection and charge-conduction between shell 10 and capacitor.

In a kind of embodiment, the flight instruments are unmanned plane, the unmanned plane include but is not limited to single rotor unmanned plane, Multi-rotor unmanned aerial vehicle and rotor wing unmanned aerial vehicle.Rotor wing unmanned aerial vehicle usually utilizes propeller around rod or axis to rotate and generates lift.The rotation Wing unmanned plane includes such as helicopter, rolling wing machine, autogyro, gyrodyne etc..The rotor wing unmanned aerial vehicle can To there is the rotor of multiple multiple positions for being mounted on the unmanned plane.For example, the flight instruments may include that quadrotor is gone straight up to Machine, six heligyroes, ten heligyroes etc..Fig. 7 is the knot of quadrotor drone in the utility model one embodiment Structure schematic diagram.

The body of quadrotor drone includes 1, four, fuselage horn 3, eight blade 8, for connecting blade and horn Rotary part, foot prop, foot rest base.One end of each horn 3 is each attached on fuselage 1, and the other end is equipped with blade rotary part, And it is symmetrically distributed in 1 surrounding of fuselage；Rotary shaft is made of fuselage rotary part 2 and horn rotary part 4, fuselage rotary part 2 For a part of fuselage 1, horn rotary part 4 is a part of horn 3, and horn rotary part 4 and 2 phase of fuselage rotary part Mutually locking；Two panels blade 8 is mounted on each blade rotary part；It is equipped with power device inside fuselage 1, is mentioned for unmanned plane For main drive.The blade rotary part includes motor 5, press strip 6, Fast detachable unit 7, and each motor 5 electrically connects with blade 8 It connects, provides driving force for the rotation of blade.

Further, horn 3 and the connector of fuselage 1 are made of fuselage rotary part 2 and horn rotary part 4, the company Fitting, which does not need the devices such as key or the buckle of other outsides, to help horn to fold and unfold, and design has limit locking knot Structure, only need to applying certain active force to horn, it just can be rotated along the direction puted forth effort, and guaranteed the convenience that user uses, also protected Minimum volume after flight and folding that can be stable after card product expansion all around.

The above is only some embodiments of the utility model, it is noted that for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the protection scope of the utility model.

Claims (8)

1. a kind of flight instruments, which is characterized in that including Flight main body, the Flight main body includes metal shell, set on described The reference ground of circuit board in metal shell, the metal shell and the circuit board is electrically connected, and the Flight main body also wraps It includes: the capacitor for being dredged the charge inducing on the metal shell, one end of the capacitor and the metal shell It is electrically connected, the reference ground of the other end and the circuit board is electrically connected.

2. flight instruments according to claim 1, which is characterized in that the capacitor include it is multiple, multiple capacitors into Row serial or parallel connection.

3. flight instruments according to claim 1, which is characterized in that the range of the capacitance of the capacitor is 0.5uf- 10uf。

4. flight instruments according to claim 1, which is characterized in that the circuit board includes multiple, multiple circuits Plate is in parallel.

5. flight instruments according to claim 2, which is characterized in that the circuit board include it is multiple, each circuit board leans on One end of nearly metal shell is all connected with the capacitor.

6. flight instruments according to claim 1, which is characterized in that be additionally provided on the metal shell inner wall for connecting The conducting connecting part with reference to ground.

7. flight instruments according to claim 6, which is characterized in that the conducting connecting part includes metal screws, metal At least one of protrusion, metal bolts.

8. flight instruments according to claim 1, which is characterized in that the Flight main body further includes power supply module, described Power supply module can give power circuit and/or analog circuit power supply in the circuit board.