CN114111450B - Seeker head - Google Patents

Abstract

The disclosure relates to a guidance head, and relates to the technical field of guidance for design searching. The seeker includes: the front end of seeking, antenna device and signal processing board, the height of the casing that the front end of seeking includes is less than or equal to 81 millimeters, so with power module, crystal oscillator module, frequency heald module, receiving module, transceiver module, first waveguide module fixed respectively in corresponding accommodation chamber, realize the layering installation to the miniaturization of front end of seeking has been reached. In addition, each module that the front end of seeking includes is installed in corresponding accommodation chamber respectively, has realized so that the compression to the space that each module took up, has saved the space in the casing, has improved the effective utilization of space in the casing. The miniaturization of the seeker is realized while the miniaturization of the front end is realized, so that the influence of the seeker on the missile in the missile flight process due to larger shape, larger inertia and the like is reduced.

Description

Seeker head

Technical Field

The disclosure relates to the technical field of guidance, in particular to a seeker.

Background

The guiding head is positioned at the forefront end of the missile and is used for providing the position information of the target object for the missile when the missile hits the target object. In order to improve the round probability error of the missile, ensure that the missile hits the target object accurately, the guide head needs to determine the position information of the target object more accurately, and influence caused by the guide head in the missile flight process is avoided.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The purpose of the present disclosure is to provide a seeker, which can achieve miniaturization of the seeker.

According to one aspect of the present disclosure, there is provided a seeker, comprising:

the front end for searching comprises a shell, a power supply module, a crystal oscillator module, a frequency synthesis module, a receiving module and a first waveguide module;

the height of the shell is less than or equal to 81 mm, the inner cavity of the shell is sequentially divided into a first accommodating cavity, a second accommodating cavity, a third accommodating cavity and a fourth accommodating cavity along the height direction, the power module and the crystal oscillator module are fixed in the first accommodating cavity, the frequency synthesis module is fixed in the second accommodating cavity, the receiving module is fixed in the third accommodating cavity, and the transceiver module and the first waveguide module are fixed in the fourth accommodating cavity;

the crystal oscillator module is electrically connected with the frequency synthesis module, the frequency synthesis module is electrically connected with the receiving module and the receiving module, the receiving module is electrically connected with the receiving module and the first waveguide module, and the power supply module is electrically connected with the crystal oscillator module, the frequency synthesis module, the receiving module and the receiving module respectively;

the antenna device is fixed at one end of the shell close to the fourth accommodating cavity and is provided with a second waveguide module, and the second waveguide module and the first waveguide module can be directionally coupled;

and the signal processing plate is fixed at one end of the shell close to the first accommodating cavity and is electrically connected with the crystal oscillator module and the receiving module.

According to any one of the seekers of the disclosure, the seeking front end further comprises a differential receiving module;

the differential receiving module is fixed in the fourth accommodating cavity, and is connected in series between the receiving module and the transmitting module.

According to any one of the guide heads disclosed by the disclosure, the fourth accommodating cavity is sequentially divided into a first sub accommodating cavity and a second sub accommodating cavity in a direction away from the third accommodating cavity;

the differential receiving module is fixed in the first sub-accommodating cavity, and the transceiver module and the first waveguide module are fixed in the second sub-accommodating cavity.

According to any one of the guide heads disclosed by the disclosure, the fourth accommodating cavity is sequentially divided into a first sub-accommodating cavity and a second sub-accommodating cavity in a direction away from the third accommodating cavity, and the differential receiving module is fixed in the first sub-accommodating cavity;

the front end for searching comprises a plurality of first waveguide modules and two transceiver modules, the plurality of first waveguide modules are fixed in the second sub-accommodating cavity, a first transceiver module of the two transceiver modules is fixed in the first sub-accommodating cavity and is electrically connected with at least one of the plurality of first waveguide modules, and a second transceiver module of the two transceiver modules is fixed in the second sub-accommodating cavity and is electrically connected with the rest of the plurality of first waveguide modules;

the differential receiving module is connected in series between the first receiving module and the receiving module, and between the second receiving module and the receiving module.

According to any one of the guiding heads disclosed by the disclosure, the side wall of the shell is provided with through holes communicated with the accommodating cavities, and the coaxial cables pass through the through holes to be electrically connected with the modules in the corresponding accommodating cavities.

A seeker according to any of the present disclosure, the housing comprising a body and at least three bead seal plates;

the body is a cylindrical structure with two open ends, and at least three glass bead sealing plates are distributed along the height direction and are fixedly connected with the body.

According to any one of the guide heads disclosed by the disclosure, the body is of a circular truncated cone cylindrical structure;

the external diameter of the small diameter end of the body is greater than or equal to 54 mm and less than or equal to 56 mm, the external diameter of the large diameter end of the body is greater than or equal to 79 mm or less than or equal to 81 mm, the first accommodating cavity is close to the large diameter end of the body, and the fourth accommodating cavity is close to the small diameter end of the body.

The seeker according to any of the present disclosure, the seeker front end further comprises a control switch;

the control switch is fixed in the first accommodating cavity and is electrically connected with the power module, and the control switch can control the power module to be connected with or disconnected from the receiving module.

The seeker according to any of the present disclosure, the seeker front end further comprises a heat-conducting plate;

the power module, the crystal oscillator module, the frequency synthesizer module, the transceiver module, the receiving module and the shell are all connected with the heat conducting plate.

The seeker according to any one of the present disclosure, further comprising a heat sink fixed to a side of the signal processing board facing away from the front end of the seeker, and in contact with the housing.

According to another aspect of the present disclosure, there is provided a missile comprising:

the missile body and the seeker in the aspect, wherein the seeker is fixed at the front end of the missile body.

In the embodiment of the disclosure, the shell with the height less than 81 mm is designed in a layered manner, and each module included in the front end of the search is fixed in the accommodating cavity of the corresponding layer, so that the miniaturization of the front end of the search is realized. The miniaturization of the seeker is realized while the miniaturization of the front end is realized, so that the guidance error of the seeker caused by larger body, larger inertia and the like is reduced, and the guidance precision of the seeker is improved. In addition, each module that the front end of seeking includes is installed in corresponding accommodation chamber respectively, has realized so that the compression to the space that each module took up, has saved the space in the casing, has improved the effective utilization of space in the casing.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic front view of a seeker according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a front end according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of electrical connection between modules at the front end according to an embodiment of the disclosure.

Fig. 4 is a schematic structural diagram of another seek front end according to an embodiment of the present disclosure.

Fig. 5 is a schematic diagram of electrical connection between modules of another front end according to an embodiment of the disclosure.

Fig. 6 is a schematic structural view of another seeker provided in an embodiment of the present disclosure.

Fig. 7 is a schematic diagram of temperature rise of a seeker according to an embodiment of the present disclosure.

Reference numerals:

1. a front end is searched; 2. an antenna device; 3. a signal processing board; 4. a heat sink;

11. a housing; 12. a power module; 13. a crystal oscillator module; 14. a frequency synthesis module; 15. a receiving module; 16. a transceiver module; 17. a first waveguide module; 18. a differential path receiving module; 19. a control switch;

111. a first accommodation chamber; 112. a second accommodation chamber; 113. a third accommodation chamber; 114. a fourth accommodation chamber; 115. a body; 116. a sealing plate;

1141. a first sub-receiving chamber; 1142. a second sub-receiving chamber;

161. a first transceiver module; 162. and a second transceiver module.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

Fig. 1 illustrates a schematic structural diagram of a seeker provided by an embodiment of the present disclosure, fig. 2 illustrates a schematic structural diagram of a seeker front end 1 provided by an embodiment of the present disclosure, and fig. 3 illustrates a schematic electrical connection between modules of a seeker front end provided by an embodiment of the present disclosure. The seeker of the disclosed embodiments may be applied to small caliber missile-borne, airborne, and like ammunition platforms.

As shown in fig. 1, the seeker includes: the front end 1 for seeking, the antenna device 2 and the signal processing board 3 as shown in fig. 2, the front end 1 for seeking comprises a shell 11, a power module 12, a crystal oscillator module 13, a frequency synthesizer module 14, a receiving module 15, a transceiver module 16 and a first waveguide module 17.

The height of the housing 11 is greater than or equal to 79 mm or less than or equal to 81 mm, as shown in fig. 2, the inner cavity of the housing 11 is divided into a first accommodating cavity 111, a second accommodating cavity 112, a third accommodating cavity 113 and a fourth accommodating cavity 114 in sequence along the height direction, the power module 12 and the crystal oscillator module 13 are fixed in the first accommodating cavity 111, the frequency synthesis module 14 is fixed in the second accommodating cavity 112, the receiving module 15 is fixed in the third accommodating cavity 113, and the transceiver module 16 and the first waveguide module 17 are fixed in the fourth accommodating cavity 114. The antenna device 2 is fixed at one end of the shell 11 near the fourth accommodating cavity 114, and the antenna device 2 is provided with a second waveguide module which can be directionally coupled with the first waveguide module 17; the signal processing board 3 is fixed at one end of the housing 11 near the first accommodation chamber 111.

As shown in fig. 3, the crystal oscillator module 13 is electrically connected with the frequency synthesizer module 14, the frequency synthesizer module 14 is electrically connected with the transceiver module 16 and the receiving module 15, the transceiver module 16 is electrically connected with the receiving module 15 and the first waveguide module 17, the power module 12 is electrically connected with the crystal oscillator module 13, the frequency synthesizer module 14, the transceiver module 16 and the receiving module 15, and the signal processing board 3 is electrically connected with the crystal oscillator module 13 and the receiving module 15.

In the embodiment of the disclosure, the shell 11 with the height less than 81 mm is designed in a layered manner, and each module included in the front end 1 is fixed in the accommodating cavity of the corresponding layer, so that the front end 1 is miniaturized. The miniaturization of the seeker is realized while the miniaturization of the seeker is realized at the front end 1, so that the guidance error of the seeker caused by larger body, larger inertia and the like is reduced, and the guidance precision of the seeker is improved. In addition, each module included in the front end 1 is respectively installed in the corresponding accommodating cavity, so that the space occupied by each module is compressed, the space in the shell 11 is saved, and the effective utilization of the space in the shell 11 is improved.

Wherein, the standard height of the shell 11 can be designed to be 80 mm, and the height of the shell 11 is in the range of 79-81 mm in combination with the machining error of the shell 11. The height direction of the housing 11 refers to a direction from the antenna device 2 to the signal processing board 3. The housing 11 has a truncated cone-like structure or other shaped structure. Taking a truncated cone-shaped structure as an example, the antenna device 2 is fixed to a small diameter end (an end close to the fourth accommodating chamber 114) of the housing 11, and the signal processing board 3 is fixed to a large diameter end (an end close to the first accommodating chamber 111) of the housing 11.

In the actual working process, the seeker is provided with a first working state and a second working state, wherein the first working state is a signal transmitting state, and the second working state is a signal receiving state.

In the working process of the seeker (comprising a first working state and a second working state), the crystal oscillator module 13 is used for generating a clock signal and transmitting the clock signal to the frequency synthesis module 14, when the seeker is in the first working state, the transceiver module 16 works in a transmitting state, the frequency synthesis module 14 generates a detection signal based on the clock signal and transmits the detection signal to the transceiver module 16, the transceiver module 16 transmits the received detection signal to the first waveguide module 17, and after the first waveguide module 17 and the second waveguide module are directionally coupled, the detection signal is transmitted outwards through the antenna device 2; when the seeker is in the second working state, the transceiver module 16 works in the receiving state, the frequency synthesizer module 14 generates a local oscillator signal based on a clock signal and transmits the local oscillator signal to the receiving module 15, in addition, after the positioning signal received by the antenna device 2 is directionally coupled with the first waveguide module 17, the positioning signal is transmitted to the transceiver module 16 through the first waveguide module 17, the positioning signal processed by the transceiver module 16 is transmitted to the receiving module 15 again, at this time, the receiving module 15 transmits the received local oscillator signal and the processed positioning signal to the signal processing board 3 together, so that the signal processing board 3 calculates according to the local oscillator signal and the processed positioning signal, and determines the position information corresponding to the positioning signal.

The detection signal refers to a signal which is transmitted by the guide head and used for determining the position information of the target hit object, and the positioning signal is a signal obtained after the target hit object reflects the detection signal. The positioning signal may be an RF signal and the processed positioning signal may be an IF signal. The operating band of the antenna device 2 when transmitting the detection signal or receiving the positioning signal is an 8 mm band.

In combination with the above-mentioned principle of operation of the seeker, the receiving module 15 does not need to be operated when the seeker is in the first operating state, in which case the seeker front end 1 further comprises a control switch 19 as shown in fig. 3 in order to save energy. The control switch 19 is fixed in the first accommodating cavity 111 and is electrically connected with the power module 12, and the control switch 19 can control the power module 12 to be connected or disconnected with the receiving module 15. Thus, when the seeker is in the first working state, the control switch 19 controls the power module 12 to be disconnected from the receiving module 15 so as to reduce energy consumption; when the seeker is in the second working state, the control switch 19 controls the power module 12 to be conducted with the receiving module 15, so that normal receiving of the positioning signal is ensured.

In some embodiments, the antenna device 2 needs to be fixed at the first end (the end close to the fourth accommodating cavity 114) of the housing 11, in order to avoid increasing the space occupied by the guide head after the antenna device 2 is fixedly connected with the housing 11, the antenna is installed in a flat plate structure, and the outer contour of the antenna device 2 matches the outer contour of the first end of the housing 11.

In combination with the above-described case 11 having the truncated cone-shaped structure, the antenna device 2 is a circular plate antenna, and the outer diameter of the antenna device 2 is equal to the outer diameter of the first end (small diameter end) of the case 11. Illustratively, the outer diameter of the small diameter end of the housing 11 is 55 mm, and the outer diameter of the antenna device 2 is easily 55 mm.

For a patch antenna, the antenna device 2 is exemplified as a patch slot antenna, but of course, the antenna device 2 may be other types of patch antennas, which are not limited in this disclosure. The antenna device 2 may be fixed to the first end of the housing 11 using 3M 2.5 fixing screws, and the thickness of the antenna device 2 is less than or equal to 10.5 mm, and for example, the thickness of the antenna device 2 is 10 mm. While the weight of the antenna device 2 can be reduced while the volume of the antenna device 2 is reduced to reduce the inertia of the guide head. The antenna device 2 weighs, for example, 38 grams.

In some embodiments, the signal processing board 3 may be an fpga+single-core DSP chip with low power consumption, and of course, other chips may be used as long as the processing of the local oscillation signal and the processed positioning signal can be achieved, and the position signal of the target hit object is determined. Wherein the thickness of the signal processing board 3 may be less than or equal to 10 mm.

The signal processing board 3 is fixed at the second end (end close to the first accommodating cavity 111) of the housing 11, and in combination with the housing 11 with the truncated cone-shaped structure, the signal processing board 3 has a circular structure, and the outer diameter of the signal processing board 3 is equal to the outer diameter of the second end (large diameter end) of the housing 11. Illustratively, the outer diameter of the large diameter end of the housing 11 is 80 mm, and the outer diameter of the signal processing board 3 is easily 80 mm.

The overall height of the seeker is less than or equal to 100 mm in combination with the height of the housing 11, the thickness of the antenna device 2, and the thickness of the signal processing board 3 described above, thereby further ensuring miniaturization of the seeker. The housing 11 has a height of 80 mm, the antenna device 2 has a thickness of 10 mm, and the signal processing board 3 has a thickness of 10 mm, for example.

In the embodiment of the present disclosure, the number of the first waveguide modules 17 may be one, two, three, four, etc., and the number of the second waveguide modules is equal to the number of the first waveguide modules 17, and the first waveguide modules 17 and the corresponding second waveguide modules can be directionally coupled in a one-to-one correspondence.

The first waveguide module 17 has a first waveguide port, the second waveguide module has a second waveguide port, and an overlapping area exists between the first waveguide port of the first waveguide module 17 and the second waveguide port of the corresponding second waveguide module in the height direction, or the first waveguide port of the first waveguide module 17 and the second waveguide port of the corresponding second waveguide module completely overlap in the height direction.

When the number of first waveguide modules 17 is plural, the plural first waveguide modules 17 are simultaneously in the first operation state of the seeker, or simultaneously in the second operation state of the seeker. Of course, it is also possible that some of the plurality of first waveguide modules 17 are in the first operating state of the seeker and the remaining part are in the second operating state of the seeker.

In addition, in the case of the plurality of first waveguide modules 17, in the second operation state of the seeker, there are multiple paths of signals corresponding to the plurality of first waveguide modules 17 one by one to be transmitted, so a plurality of signal transmission channels corresponding to the plurality of first waveguide modules 17 one by one are formed between the transceiver module 16 and the receiving module 15, and between the receiving module 15 and the signal processing board 3.

The search module has, for example, three first waveguide modules 17, wherein three transmission channels for transmitting signals are formed between the transceiver module 16 and the receiving module 15, and three transmission channels for transmitting signals are formed between the receiving module 15 and the signal processing board 3.

In the embodiment of the present disclosure, the seeking front end 1 is a millimeter wave front end, an infrared front end, or the like. The crystal oscillator module 13, the frequency synthesizer module 14, the receiving module 15, and the transceiver module 16 included in the front end 1 may refer to the related art, which is not limited in this disclosure. The two modules which need to be electrically connected are mutually inserted and connected by adopting the microminiature sintered SMP type connector, so that the stability of the electrical connection between the two modules is ensured, and meanwhile, the generation of electromagnetic interference is avoided.

One of one end of the connector and the corresponding module is a pin connector, and the other end of the connector is a jack connector; or one of one end of the connector and the corresponding module is a plug connector, and the other is a socket connector.

Illustratively, the crystal oscillator module 13 includes a frequency amplifying circuit, a vibration damping crystal oscillator, an amplifying power dividing circuit of 100MHz, a frequency synthesizing circuit (DDS); the frequency synthesis module 14 comprises an oscillator (VCO), a local oscillation signal generating circuit and a detection signal generating circuit; the transceiver module 16 includes a frequency amplifying circuit of a transmitting channel and a primary frequency converting circuit of a receiving channel.

It should be noted that, for the circuits included in each module, when the seeker is in the first working state, a part of circuits of each module do not need to work like the receiving module 15, and at this time, the control switch 19 can control the power module 12 to be disconnected from the part of circuits, so as to reduce energy consumption. The power module 12 is controlled to be disconnected from the primary frequency conversion circuit of the receiving channel by a control switch 19, for example. When the seeker is in the second working state, a further part of the circuit of each module is not required to work, and the control switch 19 can control the power module 12 to be disconnected from the further part of the circuit so as to reduce energy consumption. Illustratively, the power module 12 is controlled to be disconnected from the oscillator by a control switch 19.

In some embodiments of the present disclosure, as shown in fig. 4, the front end 1 further includes a differential receiving module 18, where the differential receiving module 18 is fixed in the fourth accommodating cavity 114, and the differential receiving module 18 is connected in series between the transceiver module 16 and the receiving module 15.

In the actual implementation process, when the seeker is in the second working state, the transceiver module 16 performs primary frequency conversion processing on the received positioning signal, then transmits the positioning signal after primary frequency conversion processing to the differential receiving module 18, and the differential receiving module 18 performs secondary frequency conversion processing on the positioning signal after primary frequency conversion processing to obtain an intermediate frequency positioning signal, and then transmits the intermediate frequency positioning signal obtained by processing to the receiving module 15.

In this way, the difference receiving module 18 is used for continuously carrying out frequency conversion processing on the positioning signals after the primary frequency conversion processing, so that the subsequent signal processing board 3 is convenient for processing the positioning signals, and the accuracy of the position information determined by the subsequent signal processing board 3 is ensured.

It should be noted that, when the seeker is in the first operation state, the differential receiving module 18 does not need to operate, and in this case, in order to save energy, the power module 12 may be controlled to be turned on or off from the differential receiving module 18 by the control switch 19 described above. Thus, when the seeker is in the first working state, the control switch 19 controls the power module 12 to be disconnected from the differential receiving module 18 so as to reduce energy consumption; when the seeker is in the second working state, the control switch 19 controls the power module 12 to be conducted with the differential receiving module 18, so that normal processing of the positioning signal is ensured.

In some embodiments, the fourth accommodating cavity 114 is divided into a first sub-accommodating cavity 1141 and a second sub-accommodating cavity 1142 in sequence in a direction away from the third accommodating cavity 113, the differential receiving module 18 is fixed in the first sub-accommodating cavity 1141, and the transceiver module 16 and the first waveguide module 17 are fixed in the second sub-accommodating cavity 1142. In this way, the first sub-accommodating cavity 1141 and the second sub-accommodating cavity 1142 implement layered arrangement of the differential receiving module 18 and the transceiver module 16, so as to avoid interference during the same-layer arrangement.

In other embodiments, the front end 1 includes a plurality of first waveguide modules 17, and a plurality of transmission channels between the first waveguide modules 17 and the transceiver modules 16, where multiple transmission channels are required for positioning signals, may be difficult to form due to space limitation in the accommodating cavity of the same layer. Thus, as shown in fig. 4, the fourth accommodating cavity 114 is divided into a first sub-accommodating cavity 1141 and a second sub-accommodating cavity 1142 in sequence in a direction away from the third accommodating cavity 113, the differential receiving module 18 is fixed in the first sub-accommodating cavity 1141, and the plurality of first waveguide modules 17 are fixed in the second sub-accommodating cavity 1142; the front end 1 comprises two transceiver modules 16, wherein a first transceiver module 161 of the two transceiver modules 16 is fixed in the first sub-accommodating cavity 1141 and is electrically connected with at least one of the plurality of first waveguide modules 17, and a second transceiver module 162 of the two transceiver modules 16 is fixed in the second sub-accommodating cavity 1142 and is electrically connected with the remaining first waveguide modules 17 of the plurality of first waveguide modules 17.

In this way, by layering the two transceiver modules 16, a plurality of transmission channels corresponding to the plurality of first waveguide modules 17 for transmitting positioning signals can be arranged in the two-layered accommodating cavity, thereby ensuring the formation of a plurality of transmission channels.

In connection with the above discussion, in the case where the front end 1 further includes the differential receiving module 18, as shown in fig. 5, the differential receiving module 18 is connected in series between the first transceiver module 161 and the receiving module 15, and between the second transceiver module 162 and the receiving module 15.

When the number of the first waveguide modules 17 connected to the first transceiver module 161 is a, a transmission channels for transmitting signals are provided between the first transceiver module 161 and the corresponding differential transceiver module 16, and a transmission channels for transmitting signals are provided between the differential receiving module 18 and the receiving module 15; when the number of the first waveguide modules 17 connected to the first transceiver module 161 is B, B transmission channels for transmitting signals are provided between the first transceiver module 161 and the corresponding differential transceiver module 16, and B transmission channels for transmitting signals are provided between the differential receiver module 18 and the receiver module 15.

In some embodiments of the present disclosure, the side wall of the housing 11 has a through hole communicating with each of the accommodation cavities, and the coaxial cable passes through the through hole to be electrically connected with the module in the corresponding accommodation cavity. Thus, through the through hole of intercommunication holding chamber, be convenient for set up the connecting wire and realize corresponding the electric connection between two modules.

Of course, in the embodiment of the present disclosure, instead of providing the through holes in the side wall of the housing 11, the through holes may be provided in the blocking plates 116 of the adjacent two accommodating chambers, which is not limited thereto.

In some embodiments, as shown in fig. 2, the housing 11 includes a body 115 and at least three sealing boards 116, where the body 115 is a cylindrical structure with two ends open, and the at least three sealing boards 116 are distributed along the height direction and are all fixedly connected with the body 115. In this manner, the interior cavity of body 115 is divided into at least four receiving cavities by at least three baffle plates 116.

In connection with the above, the housing 11 includes four baffle plates 116, and the four baffle plates 116 divide the inner cavity of the body 115 into the first accommodating cavity 111, the second accommodating cavity 112, the third accommodating cavity 113, the first sub-accommodating cavity 1141 and the second sub-accommodating cavity 1142.

The blocking plate 116 is used for isolating electromagnetic interference between the modules in the two adjacent accommodating cavities. The baffle 116 is illustratively a bead baffle. The blanking plate 116 is fixedly connected to the body 115 by means of 4M 2.5 fixing screws.

In some embodiments, in combination with the above-mentioned case 11 having a truncated cone-shaped structure, the body 115 has a truncated cone-shaped structure, the outer diameter of the small diameter end of the body 115 is greater than or equal to 54 mm and less than or equal to 56 mm, the outer diameter of the large diameter end of the body 115 is greater than or equal to 79 mm or less than or equal to 81 mm, the first accommodating cavity 111 is near the large diameter end of the body 115, and the fourth accommodating cavity 114 is near the small diameter end of the body 115. Therefore, through the design of the round table-shaped structure, when the guided missile drives the guide head to fly and rotate, the resistance received by the guide head is minimum.

In the embodiment of the disclosure, heat is inevitably generated in the working process of the seeker, so that the temperature rise speed of the seeker is higher. In a high temperature state, the working accuracy of the seeker is low, so that the accuracy of position information determination is easily affected.

On the one hand, in order to accelerate the heat dissipation effect of the seeker, the shell 11 of the seeker front end 1 may be made of copper material, and of course, may be made of other materials with higher heat conduction efficiency. In this way, the heat dissipation efficiency of the housing 11 can be increased.

On the other hand, in order to avoid that the modules included in the front end 1 are high in temperature in a short time, a module generating more heat can be made of a material with high heat melting. Thus, the temperature rise speed of each module can be reduced.

On the other hand, since the modules are arranged in layers, the circuits included in each module, especially the high-power circuits, can be distributed so as to avoid the situation that the local temperature of each circuit is too high in a short time. And for partial circuits (the FPGA circuit included in the signal processing board 3 and the frequency synthesis circuit included in the crystal oscillator module 13), a heat sink type design can be adopted, so that the situation that the local temperature of each circuit is too high in a short time can be further ensured.

On the other hand, the front end 1 may further include a heat conducting plate, and the power module 12, the crystal oscillator module 13, the frequency synthesizer module 14, the transceiver module 16, the receiving module 15 and the housing 11 are all connected with the heat conducting plate. Thus, through the arrangement of the heat conducting plate, heat transfer between each module and the shell 11 is quickened, and the situation that the temperature of each module is too high in a short time is avoided.

In a further aspect, as shown in fig. 6, the seeker further comprises a heat sink 4, the heat sink 4 being fixed to the signal processing board 3 at a side facing away from the seeking front end 1 and in contact with the housing 11. So, through the contact of radiator 4 and casing 11, guaranteed the heat transfer between casing 11 and the radiator 4, and then under the effect of radiator 4, further improved the radiating efficiency of casing 11, avoided the seeker too high condition of temperature in the short time.

In addition, with respect to the design of the seeker, the situation that the seeker is too hot in a short time can be avoided by at least one of the above aspects. In order to ensure the usability of the leader, the longer the time length of the short time is, the better. By way of example, in combination with the heat dissipation measures described in the above aspects, the temperature change of the seeker within 30 minutes is as shown in fig. 7, so that the situation that the temperature of the seeker is too high (the temperature of the partial circuit is 55.2 degrees celsius after 30 minutes, and the temperature rise is only 30.2 degrees celsius) can be avoided.

In an embodiment of the disclosure, a missile is also provided. The missile comprises a missile body and the seeker in the aspect, wherein the seeker is fixed at the front end of the missile body.

In the embodiment of the disclosure, through the embodiment, miniaturization of the seeker is realized, so that in the missile flight process, the influence on the missile flight precision caused by the large volume of the seeker is avoided, and the accuracy of the missile striking on the target hit object is improved.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (9)

1. A seeker, comprising:

the front end for searching comprises a shell, a power supply module, a crystal oscillator module, a frequency synthesis module, a receiving module and a first waveguide module;

the height of the shell is less than or equal to 81 mm, the inner cavity of the shell is sequentially divided into a first accommodating cavity, a second accommodating cavity, a third accommodating cavity and a fourth accommodating cavity along the height direction, the power module and the crystal oscillator module are fixed in the first accommodating cavity, the frequency synthesis module is fixed in the second accommodating cavity, the receiving module is fixed in the third accommodating cavity, and the transceiver module and the first waveguide module are fixed in the fourth accommodating cavity;

the crystal oscillator module is electrically connected with the frequency synthesis module, the frequency synthesis module is electrically connected with the receiving module and the receiving module, the receiving module is electrically connected with the receiving module and the first waveguide module, and the power supply module is electrically connected with the crystal oscillator module, the frequency synthesis module, the receiving module and the receiving module respectively;

the antenna device is fixed at one end of the shell close to the fourth accommodating cavity and is provided with a second waveguide module, and the second waveguide module and the first waveguide module can be directionally coupled;

the signal processing plate is fixed at one end of the shell close to the first accommodating cavity and is electrically connected with the crystal oscillator module and the receiving module;

the front end of seeking also comprises a control switch, wherein the control switch is fixed in the first accommodating cavity and is electrically connected with the power module, and the control switch can control the power module to be disconnected from the receiving module when the seeker is in a signal transmitting state and control the power module to be conducted with the receiving module when the seeker is in a signal receiving state.

2. The seeker of claim 1 wherein the seeker front end further includes a differential receiving module;

the differential receiving module is fixed in the fourth accommodating cavity, and is connected in series between the receiving module and the transmitting module.

3. The seeker of claim 2 wherein the fourth chamber is divided into a first sub-chamber and a second sub-chamber in sequence in a direction away from the third chamber;

the differential receiving module is fixed in the first sub-accommodating cavity, and the transceiver module and the first waveguide module are fixed in the second sub-accommodating cavity.

4. The seeker of claim 2, wherein the fourth accommodating chamber is divided into a first sub-accommodating chamber and a second sub-accommodating chamber in sequence in a direction away from the third accommodating chamber, and the differential receiving module is fixed in the first sub-accommodating chamber;

the front end for searching comprises a plurality of first waveguide modules and two transceiver modules, the plurality of first waveguide modules are fixed in the second sub-accommodating cavity, a first transceiver module of the two transceiver modules is fixed in the first sub-accommodating cavity and is electrically connected with at least one of the plurality of first waveguide modules, and a second transceiver module of the two transceiver modules is fixed in the second sub-accommodating cavity and is electrically connected with the rest of the plurality of first waveguide modules;

the differential receiving module is connected in series between the first receiving module and the receiving module, and between the second receiving module and the receiving module.

5. The seeker of claim 1 wherein the side wall of the housing has a through hole communicating with each of the chambers through which the coaxial cable passes to electrically connect with the module in the respective chamber.

6. The seeker of claim 1 or claim 5 wherein the housing includes a body and at least three bead seals;

the body is a cylindrical structure with two open ends, and at least three glass bead sealing plates are distributed along the height direction and are fixedly connected with the body.

7. The seeker of claim 6 wherein the body is a frustoconical structure;

the external diameter of the small diameter end of the body is greater than or equal to 54 mm and less than or equal to 56 mm, the external diameter of the large diameter end of the body is greater than or equal to 79 mm and less than or equal to 81 mm, the first accommodating cavity is close to the large diameter end of the body, and the fourth accommodating cavity is close to the small diameter end of the body.

8. The seeker of claim 1 wherein the seeker front further includes a thermally conductive plate;

the power module, the crystal oscillator module, the frequency synthesizer module, the transceiver module, the receiving module and the shell are all connected with the heat conducting plate.

9. The seeker of claim 1 wherein the seeker further includes a heat sink secured to a side of the signal processing plate facing away from the front end and in contact with the housing.