Beidou time server

Abstract

The utility model provides a Beidou time server. The Beidou time server comprises a control module, at least two antennas, an antenna detection module and a display module. The antenna detection module is respectively connected with the at least two antennas; the control module is respectively connected with the antenna detection module and the display module; the antenna detection module is used for detecting the working states of the at least two antennas and sending corresponding abnormal signals to the control module when the at least two antennas are in an abnormal state; and the control module is used for controlling the display module to display corresponding prompt information after receiving the abnormal signal. According to the utility model, the states of the plurality of antennas are respectively detected through the antenna detection module, and when the antennas are determined to be in an abnormal state, corresponding abnormal signals are sent to the control module, so that the control module controls the display module to display corresponding prompt information and prompt an operator of specific antenna damage information.

Description

TECHNICAL FIELD

[0001] The utility model relates to time server technical field, especially a big dipper time server. BACKGROUND

[0002] From the application security strategy angle, our country many industries have proposed the only use big dipper satellite navigation system as UTC time source requirement.Time server configuration antenna is used for receiving the signal of big dipper satellite navigation system, but when the antenna is abnormal, the state of the antenna cannot be displayed in time, which is not conducive to the operator to find and subsequent maintenance in time. UTILITY MODEL CONTENT

[0003] The utility model discloses a big dipper time server, which aims to display the information of abnormal antenna in time.

[0004] To achieve the above-mentioned purpose, the big dipper time server provided by the utility model comprises:

[0005] a control module, at least two antennas, an antenna detection module and a display module;

[0006] The antenna detection module is connected with the at least two antennas respectively, and the control module is connected with the antenna detection module and the display module respectively.

[0007] The antenna detection module is used for detecting the working state of the at least two antennas, and sending a corresponding abnormal signal to the control module when an antenna in the at least two antennas is in an abnormal state.

[0008] The control module is used for controlling the display module to display a corresponding prompt information after receiving the abnormal signal.

[0009] Optionally, the big dipper time server comprises a first antenna and a second antenna, and the antenna detection module comprises a first detection unit and a second detection unit.

[0010] The first end of the first detection unit is connected with the first antenna, and the second end is connected with the control module; the first end of the second detection unit is connected with the second antenna, and the second end is connected with the control module.

[0011] The first detection unit is used for detecting the working state of the first antenna, and sending a corresponding first abnormal signal to the control module when the first antenna is in a short-circuit state or an open-circuit state.

[0012] The second detection unit is used for detecting the working state of the second antenna, and sending a corresponding second abnormal signal to the control module when the second antenna is in a short-circuit state or an open-circuit state.

[0013] Optionally, the Beidou time server further comprises a satellite receiving module and a radio frequency switch.

[0014] The first end of the radio frequency switch is connected to the third end of the first detection unit, the second end is connected to the third end of the second detection unit, the third end is connected to the first end of the satellite receiving module, and the fourth end is connected to the control module; the second end of the satellite receiving module is connected to the control module.

[0015] The first detection unit is further configured to output the radio frequency signal received by the first antenna through the third end of the first detection unit; and the second detection unit is further configured to output the radio frequency signal received by the second antenna through the third end of the second detection unit.

[0016] The control module is configured to, after receiving the abnormal signal, control the radio frequency switch to turn on the path between the satellite receiving module and the third end of the first detection unit or the third end of the second detection unit.

[0017] The satellite receiving module is configured to, after receiving the radio frequency signal output by the first antenna or the second antenna, acquire navigation information and output the navigation information to the control module.

[0018] Optionally, the radio frequency switch comprises a single-pole double-throw switch; the first output end of the single-pole double-throw switch is connected to the first end of the first detection unit, the second output end is connected to the first end of the second detection unit, and the common end is connected to the first end of the satellite receiving module.

[0019] Optionally, the display module comprises a display screen.

[0020] The control module is connected to the display screen and is configured to, when receiving the abnormal signal, control the display screen to display the working state of the antenna corresponding to the abnormal signal.

[0021] Optionally, the Beidou time server further comprises an input module.

[0022] The input module is connected to the control module; and the input module is configured to, when being triggered by a user, output a corresponding trigger signal to the control module.

[0023] Optionally, the input module comprises a key or a dial switch; and the key or the dial switch is connected to the control module.

[0024] Optionally, the first detection unit comprises a short-circuit detection circuit, a first inductor and a first capacitor.

[0025] The short circuit detection circuit comprises a first PNP transistor, a first NPN transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first diode.

[0026] The collector of the first PNP transistor is connected to the first end of the first resistor and inputs a first voltage, the base is connected to the first end of the second resistor, and the emitter is connected to the first end of the third resistor, the first end of the first capacitor and the second end of the first inductor; the first end of the first inductor inputs the first antenna; the second end of the first capacitor is grounded; the second end of the first resistor is connected to the second end of the third resistor and the first end of the fourth resistor; the collector of the first NPN transistor is connected to the second end of the second resistor and the first end of the fifth resistor, the base is connected to the second end of the fourth resistor, and the emitter is grounded; the second end of the fifth resistor is connected to the cathode of the first diode; the anode of the first diode is connected to the first short circuit detection end of the control module and the second end of the sixth resistor; the first end of the sixth resistor inputs a second voltage.

[0027] Optionally, the first detection unit further comprises an open circuit detection circuit.

[0028] The open circuit detection circuit further comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a second capacitor, a second PNP transistor, a third PNP transistor and a second diode.

[0029] The seventh resistor is connected in parallel with the second capacitor, the first end of the seventh resistor is connected to the emitter of the first PNP transistor and the first end of the eighth resistor, and the second end is connected to the second end of the first inductor and the collector of the third PNP transistor; the base and the emitter of the second PNP transistor are connected, and the base is also connected to the base of the third PNP transistor, and the emitter is further connected to the first end of the ninth resistor; the second end of the ninth resistor is grounded; the emitter of the third PNP transistor is connected to the first end of the tenth resistor and the first end of the eleventh resistor; the second end of the tenth resistor is grounded, and the second end of the eleventh resistor is connected to the cathode of the second diode; the anode of the second diode is connected to the first open circuit detection end of the control module and the second end of the twelfth resistor; the first end of the twelfth resistor inputs the second voltage.

[0030] The utility model provides a big dipper time server, the big dipper time server includes: control module, at least two antennas, antenna detection module and display module, the antenna detection module is connected the at least two antennas respectively, the control module is connected the antenna detection module and the display module respectively, the antenna detection module is used for detecting the working condition of the at least two antennas, and when the at least two antennas are in abnormal state, corresponding abnormal signal is sent to the control module, the control module is used for after receiving the abnormal signal, control display module shows corresponding prompt information, the utility model discloses through antenna detection module detects the state of multiple antennas respectively, when determining that the antenna is in abnormal state, corresponding abnormal signal is sent to the control module, so that the control module controls display module to show corresponding prompt information, prompts the antenna damage information of specific operator. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, other drawings can also be obtained according to the structure shown in these drawings.

[0032] Figure 1 It is the structural schematic diagram of the big dipper time server one embodiment of the utility model,

[0033] Figure 2 It is the structural schematic diagram of the big dipper time server first embodiment of the utility model,

[0034] Figure 3 It is the first structural schematic diagram of the big dipper time server second embodiment of the utility model,

[0035] Figure 4 It is the second structural schematic diagram of the big dipper time server second embodiment of the utility model,

[0036] Figure 5 It is the structural schematic diagram of the big dipper time server third embodiment of the utility model.

[0037] EXPLANATION OF DRAWINGS:

[0038]

[0039]

[0040] The realization of the utility model, functional characteristics and advantages will be further explained with reference to the drawings. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0045] The present application provides a Beidou time server, which aims to display information of an abnormal antenna in time; with reference to Figure 1 , the Beidou time server comprises:

[0046] a control module 30, at least two antennas 10, an antenna detection module 20 and a display module 40;

[0047] The antenna detection module 20 is connected with the at least two antennas 10 respectively; the control module 30 is connected with the antenna detection module 20 and the display module 40 respectively;

[0048] The antenna detection module 20 is configured to detect the working state of the at least two antennas 10, and send a corresponding abnormal signal to the control module 30 when an antenna in the at least two antennas 10 is in an abnormal state.

[0049] The control module 30 is configured to control the display module 40 to display corresponding prompt information after receiving the abnormal signal.

[0050] It should be noted that all antennas are connected to the antenna detection module 20, and the antenna detection module 20 performs short-circuit detection and open-circuit detection on the connected antennas. If an antenna is in a short-circuit state or an open-circuit state, it is considered to be in an abnormal state. The antenna detection module 20 can include a short-circuit detection circuit and an open-circuit detection circuit, respectively, for detecting whether an antenna is in a short-circuit state and detecting whether an antenna is in an open-circuit state. The antenna detection module 20 sends a corresponding abnormal signal to the control module 30 when it detects that any one of the at least two antennas is in a short-circuit state or an open-circuit state. Specifically, when an antenna is in a short-circuit state, the antenna detection module 20 can send a short-circuit signal to the control module 30, and the short-circuit signal includes the number of the antenna in the short-circuit state. When an antenna is in an open-circuit state, the antenna detection module 20 can send an open-circuit signal to the control module 30, and the open-circuit signal includes the number of the antenna in the open-circuit state. It is easy to understand that since multiple antennas are connected to the antenna detection module 20, in order to facilitate identification and management, the antennas can be numbered. In addition, in actual equipment, since the antennas are connected to the antenna detection module 20 through interfaces, each interface accesses an interface, so the antenna number can be consistent with the number of the interface accessed by the antenna, so that the operator can quickly locate the antenna in the abnormal state and its corresponding interface after obtaining the prompt information of the display module 40. When any one of the antennas connected to the antenna detection module 20 is in an abnormal state, the antenna detection module 20 sends an abnormal signal to the control module 30.

[0051] The control module 30 controls the display module 40 to display corresponding prompt information after receiving the abnormal signal, and the prompt information includes the number of the antenna in the abnormal state and the specific open-circuit state or short-circuit state. The display module 40 can include a display screen. The control module 30 can include an MCU, an FPGA, or a SOC controller.

[0052] The utility model provides a big dipper time server, the big dipper time server includes: control module 30, at least two antennas, antenna detection module 20 and display module 40, antenna detection module 20 connects the at least two antennas respectively, control module 30 connects antenna detection module 20 and display module 40 respectively, antenna detection module 20 is used for detecting the working condition of the at least two antennas, and when the at least two antennas are in abnormal state, corresponding abnormal signal is sent to control module 30, control module 30 is used for controlling display module 40 to show corresponding prompt information after receiving the abnormal signal, the utility model discloses through antenna detection module 20 detects the state of multiple antennas respectively, when determining that the antenna is in abnormal state, corresponding abnormal signal is sent to control module 30, so that control module 30 controls display module 40 to show corresponding prompt information, prompts the antenna damage information of specific operator.

[0053] Multiple antennas are connected to the antenna detection module 20, and the antenna detection module 20 is detected.

[0054] First, the antenna detection module 20 successively detects the connected antennas in open circuit detection and short circuit detection. After the detection of the previous antenna is completed, the detection of the next antenna is performed. This method relies on the sequential switching of the antennas to be detected, and it takes a lot of time to detect all the antennas.

[0055] Second, the antenna detection module 20 is provided with a plurality of detection units, each of which includes an open circuit detection circuit and a short circuit detection circuit. The plurality of detection units detect whether the antennas are in a short circuit state or an open circuit state. According to the number relationship between the detection units and the antennas, it can be divided into the following two kinds: first, the number of detection units is less than the number of antennas, and the number of antennas to be detected can be allocated to the detection units. After the current antenna detection is completed, a antenna is selected from the undetected antennas for detection until the allocated number of antennas is completed or there is no undetected antenna. Second, the number of detection units is greater than or equal to the number of antennas. As can be easily understood, the number of detection units can be used to detect the state of the antennas one by one. Although this method requires multiple short circuit detection circuits and open circuit detection circuits, it has the advantages of fast detection speed, less time consumption, and real-time detection of antennas.

[0056] As shown in Figure 2 The big dipper time server includes a first antenna 10 and a second antenna 10 in the first embodiment of the utility model. The antenna detection module 20 includes a first detection unit 210 and a second detection unit 220.

[0057] The first end of the first detection unit 210 is connected with the first antenna, and the second end is connected with the control module 30; the first end of the second detection unit 220 is connected with the second antenna, and the second end is connected with the control module 30.

[0058] The first detection unit 210 is used for detecting the working state of the first antenna, and sends a corresponding first abnormal signal to the control module 30 when the first antenna is in a short-circuit state or an open-circuit state.

[0059] The second detection unit 220 is used for detecting the working state of the second antenna, and sends a corresponding second abnormal signal to the control module 30 when the second antenna is in a short-circuit state or an open-circuit state.

[0060] It should be noted that in the embodiment, only the first antenna and the second antenna are provided, and the antenna detection unit includes the first detection unit 210 and the second detection unit 220. The detection unit detects the antennas one by one, specifically, the first detection unit 210 detects the working state of the first antenna, and the second detection unit 220 detects the working state of the second antenna.

[0061] The first detection unit 210 sends a corresponding first abnormal signal to the control module 30 when the first antenna is in a short-circuit state or an open-circuit state; the first abnormal signal includes the number of the first antenna and the working state of the first antenna. It can be easily understood that the first detection unit 210 sends a corresponding first abnormal signal to the control module 30 when the first antenna is in a short-circuit state, so that the control module 30 knows that the first antenna is in a short-circuit state; correspondingly, when the first antenna is in an open-circuit state, the first abnormal signal sent by the first detection unit 210 to the control module 30 can make the control module 30 know that the first antenna is in an open-circuit state. Similarly, the second abnormal signal includes the number of the second antenna and the working state of the second antenna, for example, in a short-circuit state or an open-circuit state.

[0062] The embodiment has the advantages of fast detection speed, less time consumption, and the function of real-time detection.

[0063] Both the first detection unit 210 and the second detection unit 220 can perform short-circuit detection and open-circuit detection. It can be easily understood that the first detection unit 210 and the second detection unit 220 both include short-circuit detection circuits and open-circuit detection circuits. The short-circuit detection circuits and the open-circuit detection circuits in the first detection unit 210 and the second detection unit 220 can be the same respectively.

[0064] As Figure 3As shown in the second embodiment of the utility model, the first detection unit 210 includes: a first short circuit detection circuit 2110, a first inductor L1 and a first capacitor C1;

[0065] The first short circuit detection circuit 2110 includes: a first PNP transistor, a first NPN transistor, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a first diode D1;

[0066] The collector of the first PNP transistor is connected with the first end of the first resistor R1 and inputs a first voltage, the base is connected with the first end of the second resistor R2, and the emitter is connected with the first end of the third resistor R3, the first end of the first capacitor C1 and the second end of the first inductor L1; the first end of the first inductor L1 inputs the first antenna; the second end of the first capacitor C1 is grounded; the second end of the first resistor R1 is connected with the second end of the third resistor R3 and the first end of the fourth resistor R4; the collector of the first NPN transistor is connected with the second end of the second resistor R2 and the first end of the fifth resistor R5, the base is connected with the second end of the fourth resistor R4, and the emitter is grounded; the second end of the fifth resistor R5 is connected with the cathode of the first diode D1; the anode of the first diode D1 is connected with the first short circuit detection end of the control module 30 and the second end of the sixth resistor R6; the first end of the sixth resistor R6 inputs a second voltage.

[0067] It should be noted that the first short-circuit detection end of the control module 30 is connected to the anode of the first diode D1, and the voltage at the first short-circuit detection end is related to the sixth resistor R6, the fifth resistor R5, the second voltage, and the collector voltage of the first NPN transistor. The sixth resistor R6 and the fifth resistor R5 form a resistor voltage dividing circuit, and the second voltage is divided and output to the first short-circuit detection end. The control module 30 determines whether the antenna is short-circuited according to the voltage value at the first short-circuit detection end. When the antenna is short-circuited, it is easy to understand that the current flowing into the antenna through the first inductor L1 increases, the current flowing through the collector and emitter of the first PNP transistor will increase, and correspondingly, the current flowing through the collector and base of the first PNP transistor will also increase. Due to the presence of the first diode D1, the current flowing out of the base of the first PNP transistor can only pass through the first NPN transistor to the ground. The voltage value at the collector of the first NPN transistor is obtained by subtracting the internal resistance between the collector and the base of the first PNP transistor from the first voltage, and then subtracting the voltage value across the second resistor R2. Due to the increase in the current flowing through the third resistor R3, the voltage across the third resistor R3 increases, resulting in a decrease in the voltage value at the collector of the first NPN transistor, thereby causing the voltage at the first short-circuit detection end of the control module 30 to decrease. A first voltage threshold can be set, and when the antenna is short-circuited, the voltage value at the first short-circuit detection end is less than the first voltage threshold, and when the antenna is normal, the voltage value at the first short-circuit detection end is greater than or equal to the first voltage threshold. The first voltage threshold can be determined by the developer. The first resistor R1 and the third resistor R3 form a resistor voltage dividing circuit, and the first voltage is divided and output to the base of the first NPN transistor. The fourth resistor R4 and the second resistor R2 are current limiting resistors.

[0068] The first detection unit 210 further includes a first open-circuit detection circuit 2120.

[0069] The first open-circuit detection circuit 2120 further includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second capacitor C2, a second PNP transistor, a third PNP transistor, and a second diode D2.

[0070] The seventh resistor R7 is connected in parallel with the second capacitor C2, a first end of the seventh resistor R7 is connected with the emitter of the first PNP transistor and a first end of the eighth resistor R8, and a second end of the seventh resistor R7 is connected with a second end of the first inductor L1 and the collector of the third PNP transistor; the base and the emitter of the second PNP transistor are connected, and the base of the second PNP transistor is connected with the base of the third PNP transistor, and the emitter of the second PNP transistor is further connected with a first end of the ninth resistor R9; a second end of the ninth resistor R9 is grounded; the emitter of the third PNP transistor is connected with a first end of the tenth resistor R10 and a first end of the eleventh resistor R11; a second end of the tenth resistor R10 is grounded, and a second end of the eleventh resistor R11 is connected with the cathode of the second diode D2; the anode of the second diode D2 is connected with a first open circuit detection end of the control module 30 and a second end of the twelfth resistor R12; a first end of the twelfth resistor R12 is connected with the second voltage.

[0071] It should be noted that the second capacitor C2 is used to filter high-frequency components in the electrical signal and perform high-frequency filtering. The seventh resistor R7 is a current-limiting resistor. For the second PNP transistor connected thereto, the seventh resistor R7 has the function of voltage division and current limiting in the direct current bias circuit, and together with the second capacitor C2, it helps to set the appropriate working point of the second PNP transistor. The second capacitor C2 isolates direct current, allowing the direct current bias current to flow stably through the seventh resistor R7, so that the base of the second PNP transistor can obtain a stable bias voltage. When the antenna is open, the resonance state of the resonant structure composed of the first inductor L1, the first antenna and the first capacitor C1 changes; the current flowing into the collector of the second PNP transistor and the current flowing into the collector of the third PNP transistor decrease, and since the tenth resistor R10 is connected in series with the third PNP transistor, the current flowing through the tenth resistor R10 decreases accordingly, and the voltage value across the tenth resistor R10 decreases, so that the resistance voltage dividing circuit composed of the eleventh resistor R11 and the twelfth resistor R12 divides the voltage of the second resistor R2 and outputs it to the first open circuit detection end, thereby reducing the voltage at the first open circuit detection end of the control module 30. A second voltage threshold can be set, and when the antenna is open, the voltage at the first open circuit detection end is less than the second voltage threshold, and when the antenna is normal, the voltage at the first open circuit detection end is greater than or equal to the second voltage threshold. The second voltage threshold can be determined by the developer. The eighth resistor R8, the ninth resistor R9 and the tenth resistor R10 are current-limiting resistors. The base and the emitter of the second PNP transistor are connected, and the base of the second PNP transistor is connected with the base of the third PNP transistor, thereby providing a circuit path for the base current of the third PNP transistor.

[0072] The short-circuit detection circuit topology and the open-circuit detection circuit topology in the first detection unit 210 and the second detection unit 220 can be the same.

[0073] With reference to Figure 4 The second detection unit 220 comprises a second short-circuit detection circuit 2210, a second inductor L2 and a third capacitor C3.

[0074] The second short-circuit detection circuit 2210 comprises a fourth PNP transistor, a second NPN transistor, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18 and a third diode D3.

[0075] The collector of the fourth PNP transistor is connected to the first end of the thirteenth resistor R13 and inputs a first voltage, the base is connected to the first end of the fourteenth resistor R14, and the emitter is connected to the first end of the third capacitor C3, the second end of the second inductor L2 and the first end of the fifteenth resistor R15; the first end of the second inductor L2 is connected to the second antenna; the second end of the third capacitor C3 is grounded; the second end of the fifteenth resistor R15 is connected to the first end of the sixteenth resistor R16, and the second end of the fourteenth resistor R14 is connected to the collector of the second NPN transistor and the first end of the seventeenth resistor R17; the base is connected to the second end of the sixteenth resistor R16, and the emitter is grounded; the second end of the seventeenth resistor R17 is connected to the cathode of the third diode D3; the anode of the third diode D3 is connected to the second short-circuit detection end of the control module 30 and the second end of the eighteenth resistor R18; and the first end of the eighteenth resistor R18 inputs a second voltage. Since the circuit topology of the second short-circuit detection circuit 2210 in the second detection unit 220 is completely consistent with that of the second short-circuit detection circuit 2210 in the first detection unit 210, the functions of the devices in the second short-circuit detection circuit 2210 of the second detection unit 220 can be described by referring to the functions of the devices at the corresponding positions in the second short-circuit detection circuit 2210 of the first detection unit 210. Here, no further description is given.

[0076] The second detection unit 220 further comprises a second open-circuit detection circuit 2220.

[0077] The second open-circuit detection circuit 2220 further comprises a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a fourth capacitor C4, a fifth PNP transistor, a sixth PNP transistor and a fourth diode D4.

[0078] The nineteenth resistor R19 is connected in parallel with the fourth capacitor C4, the first end of the nineteenth resistor R19 is connected with the emitter of the first PNP triode and the first end of the twentieth resistor R20, the second end is connected with the second end of the first inductor L1 and the collector of the sixth PNP triode; the base and the emitter of the fifth PNP triode are connected, and the base of the sixth PNP triode is also connected; the emitter is also connected with the first end of the twenty-first resistor R21; the second end of the twenty-first resistor R21 is grounded; the emitter of the sixth PNP triode is connected with the first end of the twenty-second resistor R22 and the first end of the twenty-third resistor R23; the second end of the twenty-second resistor R22 is grounded, and the second end of the twenty-third resistor R23 is connected with the cathode of the fourth diode D4; the anode of the fourth diode D4 is connected with the second open circuit detection end of the control module 30 and the second end of the twenty-fourth resistor R24; the first end of the twenty-fourth resistor R24 is connected with the second voltage.

[0079] Since the circuit topology of the second open circuit detection circuit 2220 in the second detection unit 220 is completely consistent with that of the first open circuit detection circuit 2120 in the first detection unit 210, the functions of the devices in the second open circuit detection circuit 2220 of the second detection unit 220 can be described by referring to the functions of the devices at the corresponding positions in the first open circuit detection circuit 2120 of the first detection unit 210.

[0080] After obtaining the states of the antennas, in order to ensure time synchronization, the control module 30 needs to switch the antennas with good states according to the states of the antennas, so as to obtain correct navigation information in time and complete time synchronization.

[0081] Referring to Figure 5 In the third embodiment of the utility model, the Beidou time server further comprises a satellite receiving module 60 and a radio frequency switch 50.

[0082] The first end of the radio frequency switch 50 is connected with the third end of the first detection unit 210, the second end is connected with the third end of the second detection unit 220, the third end is connected with the first end of the satellite receiving module 60, and the fourth end is connected with the control module 30; the second end of the satellite receiving module 60 is connected with the control module 30.

[0083] The first detection unit 210 is further used for outputting the radio frequency signal received by the first antenna through the third end of the first detection unit 210; and the second detection unit 220 is further used for outputting the radio frequency signal received by the second antenna through the third end of the second detection unit 220.

[0084] The control module 30 is configured to control the radio frequency switch 50 to turn on a path between the satellite receiving module 60 and the third end of the first detection unit 210 or the third end of the second detection unit 220 after receiving the abnormal signal.

[0085] The satellite receiving module 60 is configured to acquire navigation information and output the navigation information to the control module 30 after receiving the radio frequency signal output by the first antenna or the second antenna.

[0086] It is easy to understand that the radio frequency switch 50 has three ports, wherein the first port is connected to the first detection unit 210, the second port is connected to the second detection unit 220, and the third port is connected to the satellite receiving module 60. The satellite receiving module 60 is configured to extract satellite navigation information according to the radio frequency signal of the antenna. The satellite receiving module 60 can be a Beidou module. The control module 30 controls the radio frequency switch 50 according to the received abnormal signal, so that the first detection unit 210 or the second detection unit 220 is connected to the satellite receiving module 60. It should be noted that the first detection unit 210 detects the working state of the first antenna, and does not affect the radio frequency signal output by the first antenna to reach the satellite receiving module 60 through the first detection unit 210. Correspondingly, the second detection unit 220 detects the working state of the second antenna, and does not affect the radio frequency signal output by the second antenna to reach the satellite receiving module 60 through the second detection unit 220.

[0087] The control module 30 controls the radio frequency switch 50 to turn on the path between the detection unit connected to the antenna in the normal state and the satellite receiving module 60 after receiving the abnormal signal. For example, the abnormal information contains information that the first antenna is in an open circuit state or a short circuit state. After receiving the abnormal information, the control module 30 controls the radio frequency switch 50 to turn on the path between the second detection unit 220 and the satellite receiving module 60.

[0088] In addition, the control module 30 obtains time information according to the navigation information output by the satellite receiving module 60, and can display the time information in the display module 40 and perform subsequent processing, for example, time service for other devices.

[0089] The radio frequency switch 50 includes a single-pole double-throw switch. The first output end of the single-pole double-throw switch is connected to the first end of the first detection unit 210, the second output end is connected to the first end of the second detection unit 220, and the common end is connected to the first end of the satellite receiving module 60.

[0090] The display module 40 includes a display screen.

[0091] The control module 30 is connected with the display screen, and is configured to control the display screen to display the working state of the antenna corresponding to the abnormal signal when the abnormal signal is received.

[0092] In addition to displaying information, the time server needs to be triggered by an operator to change the display content or set the working module of the time server, and to turn on / off a function of the time server, so as to realize more precise control.

[0093] In the fourth embodiment of the present application, the Beidou time server further comprises an input module 70.

[0094] The input module 70 is connected with the control module 30, and is configured to output a corresponding trigger signal to the control module 30 when triggered by a user.

[0095] It should be noted that the input module 70 can comprise a plurality of trigger elements, each trigger element outputs a different trigger signal to the control module 30 when triggered, and in addition, the plurality of trigger elements can be combined, and different combinations correspond to different trigger signals. The trigger element can be a key, a dial switch or a touch screen. A mapping relationship between the trigger signal and the function of the time server can be set, so that the operator outputs a corresponding trigger signal to the control module 30 through the trigger element in the input module 70 to realize the corresponding function of the time server. The present application does not limit the number and type of trigger elements in the input module 70, and the function of the time server to which the trigger signal triggered by the trigger element is mapped. In an example, the display screen enters a screen-off state after being lit for a period of time, and when the operator triggers the trigger element in the input module 70, the display screen is re-lit.

[0096] The input module 70 comprises a key or a dial switch, and the key or the dial switch is connected with the control module 30.

[0097] The above is only an optional embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A Beidou time server, characterized in that, The Beidou time server comprises: a control module, at least two antennas, an antenna detection module and a display module; the antenna detection module is connected with the at least two antennas respectively; the control module is connected with the antenna detection module and the display module respectively; the antenna detection module is configured to detect working states of the at least two antennas, and send corresponding abnormal signals to the control module when an antenna in the at least two antennas is in an abnormal state; the control module is configured to control the display module to display corresponding prompt information after receiving the abnormal signals.

2. The Beidou time server of claim 1, wherein, The Beidou time server comprises a first antenna and a second antenna; the antenna detection module comprises a first detection unit and a second detection unit; a first end of the first detection unit is connected with the first antenna, and a second end of the first detection unit is connected with the control module; a first end of the second detection unit is connected with the second antenna, and a second end of the second detection unit is connected with the control module; the first detection unit is configured to detect a working state of the first antenna, and send a corresponding first abnormal signal to the control module when the first antenna is in a short-circuit state or an open-circuit state; the second detection unit is configured to detect a working state of the second antenna, and send a corresponding second abnormal signal to the control module when the second antenna is in a short-circuit state or an open-circuit state.

3. The Beidou time server of claim 2, wherein, The Beidou time server further comprises a satellite receiving module and a radio frequency switch; a first end of the radio frequency switch is connected with a third end of the first detection unit, a second end of the radio frequency switch is connected with a third end of the second detection unit, a third end of the radio frequency switch is connected with a first end of the satellite receiving module, and a fourth end of the radio frequency switch is connected with the control module; a second end of the satellite receiving module is connected with the control module; the first detection unit is further configured to output a radio frequency signal received by the first antenna through the third end of the first detection unit; and the second detection unit is further configured to output a radio frequency signal received by the second antenna through the third end of the second detection unit; the control module is configured to control the radio frequency switch to turn on a path between the satellite receiving module and the third end of the first detection unit or the third end of the second detection unit after receiving the abnormal signals; the satellite receiving module is configured to acquire navigation information and output the navigation information to the control module after receiving the radio frequency signals output by the first antenna or the second antenna.

4. The Beidou time server of claim 3, wherein, The radio frequency switch comprises a single-pole double-throw switch; a first output end of the single-pole double-throw switch is connected with the first end of the first detection unit, a second output end of the single-pole double-throw switch is connected with the first end of the second detection unit, and a common end of the single-pole double-throw switch is connected with the first end of the satellite receiving module.

5. The Beidou time server of claim 2, wherein, The display module comprises a display screen; the control module is connected with the display screen, and is configured to control the display screen to display a working state of an antenna corresponding to the abnormal signal when the abnormal signal is received.

6. The Beidou time server of claim 2, wherein, The Beidou time server further comprises an input module; the input module is connected with the control module; and the input module is configured to output a corresponding trigger signal to the control module when being triggered by a user.

7. The Beidou time server of claim 6, wherein, The input module comprises a button or a dial switch; and the button or the dial switch is connected with the control module.

8. The BeiDou time server according to any one of claims 2 to 7, characterized in that, The first detection unit comprises a short circuit detection circuit, a first inductor and a first capacitor. The short circuit detection circuit comprises a first PNP transistor, a first NPN transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first diode. The collector of the first PNP transistor is connected to the first end of the first resistor and inputs a first voltage, the base is connected to the first end of the second resistor, and the emitter is connected to the first end of the first capacitor, the second end of the first inductor and the first end of the third resistor; the first end of the first inductor is connected to the first antenna; the second end of the first capacitor is grounded; the second end of the first resistor is connected to the second end of the third resistor and the first end of the fourth resistor; the collector of the first NPN transistor is connected to the second end of the second resistor and the first end of the fifth resistor, the base is connected to the second end of the fourth resistor, and the emitter is grounded; the second end of the fifth resistor is connected to the cathode of the first diode; the anode of the first diode is connected to the first short circuit detection end of the control module and the second end of the sixth resistor; the first end of the sixth resistor inputs a second voltage.

9. The Beidou time server of claim 8, wherein, The first detection unit further comprises an open circuit detection circuit. The open circuit detection circuit further comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a second capacitor, a second PNP transistor, a third PNP transistor and a second diode. The seventh resistor is connected in parallel with the second capacitor, the first end of the seventh resistor is connected to the emitter of the first PNP transistor and the first end of the eighth resistor, and the second end is connected to the second end of the first inductor and the collector of the third PNP transistor; the base and the emitter of the second PNP transistor are connected, and the base is also connected to the base of the third PNP transistor, and the emitter is also connected to the first end of the ninth resistor; the second end of the ninth resistor is grounded; the emitter of the third PNP transistor is connected to the first end of the tenth resistor and the first end of the eleventh resistor; the second end of the tenth resistor is grounded, and the second end of the eleventh resistor is connected to the cathode of the second diode; the anode of the second diode is connected to the first open circuit detection end of the control module and the second end of the twelfth resistor; the first end of the twelfth resistor inputs the second voltage.

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