A new type of connecting terminal for a computed tomography scanner

Abstract

The present invention discloses a novel connection terminal for a computed tomography scanner, comprising a connection component and a monitoring component; the connection component is disposed at the bottom of the computed tomography scanner and is used for the physical connection between the fixed component and the rotating component of the computed tomography scanner, serving as the CAN path of the communication link; the monitoring component is used for the electrical connection between the fixed component and the rotating component of the computed tomography scanner, serving as the wireless data communication link; the monitoring component is connected to the connection component through a cable. By designing three terminal groups with different lengths, reliable grounding, power supply connection, potential balance of different components, and in-place detection function of the movement of the connection component are realized, ensuring the electrical safety of the device and the operator.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a novel connection terminal for a computed tomography scanner. Background Art

[0002] A computed tomography (CT) scanner generally includes a stationary part and a rotating part. In the prior art, a slip ring is usually used to achieve the transmission of electric energy and signals between the stationary part and the rotating part. Limited by the slip ring structure, the carbon brushes used for the transmission of electric energy and signals need to be regularly cleaned of carbon deposits, thereby increasing the later maintenance cost of the CT instrument. Moreover, the slip ring will cause an increase in the thickness of the computed tomography scanner, hindering its miniaturization and mobility.

[0003] During the exposure process of the rotating part of the computed tomography scanner, rotation operation is required. Since the slip ring is removed, the connection between the stationary part and the rotating part is only through bearing contact, which cannot guarantee the grounding impedance of the rotating part. In the case of poor grounding conditions, after the computed tomography scanner is exposed and rotated, due to the accumulation of charges, there will be a potential difference in the ground potential between the stationary part and the rotating part. If the interface connection between the rotating part and the stationary part is directly made at this time, it is possible to damage the equipment due to the potential difference. If the rotating part stores a large amount of charges, it may cause harm to the operator. Summary of the Invention

[0004] Technical Objective: Aiming at the defects in the prior art, the present invention discloses a novel connection terminal for a computed tomography scanner. By designing a terminal group with three different lengths, reliable grounding, power supply connection, potential balance of different components, and in-place detection function of the movement of the connection component are realized, ensuring the electrical safety of the equipment and the operator.

[0005] Technical Solution: To achieve the above technical objective, the present invention adopts the following technical solutions.

[0006] A novel connection terminal for a computed tomography scanner includes a connection component and a monitoring component; the connection component is arranged at the bottom of the computed tomography scanner and is used for the physical connection between the stationary part and the rotating part of the computed tomography scanner, serving as a communication link CAN path; the monitoring component is used for the electrical connection between the stationary part and the rotating part of the computed tomography scanner, serving as a wireless data communication link; different lengths of wiring terminals are provided in the connection component, which are respectively used for power supply connection, communication connection, and grounding connection; the monitoring component is connected to the connection component through a cable.

[0007] Preferably, the connection component includes a driving component, a bottom plate, a first mounting plate, a second mounting plate, a connector terminal group, and a plug terminal group; the bottom plate is fixedly arranged on the fixed part of the computed tomography scanner, one end of the bottom plate fixedly mounts the first mounting plate, the driving component penetrates through the first mounting plate, one end of the driving component is fixedly provided with the plug terminal group, and the plug terminal group is connected to the electrical performance device in the fixed part of the computed tomography scanner; the second mounting plate is fixedly arranged on the rotating part of the computed tomography scanner, the second mounting plate fixedly arranges the connector terminal group through a connecting plate, and the connector terminal group is connected to the electrical performance device in the rotating part of the computed tomography scanner; the driving component is used to drive the plug terminal group to move, so that the plug terminal group approaches or moves away from the connector terminal group, thereby electrically connecting or disconnecting the plug terminal group and the connector terminal group.

[0008] Preferably, the plug terminal group is several groups of wiring terminals with different lengths, including plug terminal A, plug terminal B, and plug terminal C; plug terminal A, plug terminal B, and plug terminal C are respectively used for power supply connection, communication connection, and grounding connection; the connector terminal group is several spring pieces, including connector terminal A, connector terminal B, and connector terminal C, and the number of wiring terminals is the same as the number of spring pieces; among them, the wiring terminal length of plug terminal A for power supply connection is greater than that of plug terminal B for communication connection, and the wiring terminal length of plug terminal A for power supply connection is less than that of plug terminal C for grounding connection.

[0009] Preferably, the driving component includes a driving motor, a transfer piece, a lead screw, and a connecting sleeve; the lead screw penetrates through the first mounting plate, one end of the lead screw is connected to the driving motor, and the other end is sleeved with the connecting sleeve and then connected to the transfer piece, and the plug terminal group is fixed on the transfer piece, and the driving motor makes the plug terminal group approach or move away from the connector terminal group by controlling the movement of the lead screw.

[0010] Preferably, a guide rod is further arranged on the first mounting plate, and a guide hole for the guide rod is arranged on the transfer piece, and when the lead screw is connected to the transfer piece, the guide rod is inserted into the guide hole.

[0011] Preferably, a guide groove is further arranged at one end of the second mounting plate, and a guide pin is arranged on the transfer piece, and the guide pin is inserted into the guide groove when the plug terminal group and the connector terminal group are electrically connected.

[0012] Preferably, the monitoring component includes a rectifier bridge chip V1, an optocoupler chip U1, an optocoupler chip U2, a voltage reference chip U3, a voltage reference chip U4, and an optocoupler chip U5;

[0013] Pin 1 of the rectifier bridge chip V1 is connected to pin 1 of the optocoupler chip U2 after being serially connected with resistors R4 and R5. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through serially connected resistors R8, R10, and R13. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through serially connected resistors R9, R11, and R14. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through parallel-connected resistors R12 and photodiode D3. Pin 4 of the rectifier bridge chip V1 is connected to pin 3 of the voltage reference chip U4. Pin 3 of the voltage reference chip U4 is connected to pin 1 of the voltage reference chip U4 through serially connected resistors R13 and R10. Pin 3 of the voltage reference chip U4 is connected to pin 2 of the voltage reference chip U4 through capacitor C6. Pin 3 of the voltage reference chip U4 is connected to pin 2 of the voltage reference chip U4 through serially connected resistors R14 and R11. Pin 2 of the voltage reference chip U4 is connected to pin 1 of the voltage reference chip U3. Pin 3 of the voltage reference chip U4 is connected to pin 3 of the voltage reference chip U3. Pin 2 of the voltage reference chip U3 is connected to pin 1 of the optocoupler chip U2 through cascaded photodiode D2 and resistor R5. Pin 2 of the voltage reference chip U3 is connected to pin 2 of the optocoupler chip U2. Pin 2 of the optocoupler chip U2 is connected to pin 1 of the optocoupler chip U2 through capacitor C4 and resistor R5; Pin 3 of the optocoupler chip U2 is grounded. Pin 4 of the optocoupler chip U2 is connected to 3.3V voltage through resistor R6. Pin 3 of the optocoupler chip U2 is connected to pin 4 of the optocoupler chip U2 after being serially connected with capacitor C5 and resistor R7. Pin 4 of the optocoupler chip U2 outputs the AC_OK signal through resistor R7;

[0014] Pin 2 of the rectifier bridge chip V1 is connected to one end of the parallel-connected capacitors C7 and C8. The other end of the parallel-connected capacitors C7 and C8 is serially connected with resistor R15 and then connected to the negative terminal of the photodiode D5. The positive terminal of the photodiode D5 is connected to pin 1 of the optocoupler chip U5. Pin 1 of the optocoupler chip U5 is connected to the negative terminal of the cascaded photodiode D4. The positive terminal of the photodiode D4 is connected to pin 2 of the optocoupler chip U5. Pin 3 of the optocoupler chip U5 is grounded. Pin 4 of the optocoupler chip U5 is connected to 3.3V voltage through resistor R17. Pin 3 of the optocoupler chip U5 is connected to pin 4 of the optocoupler chip U5 after being serially connected with capacitor C9 and resistor R16. Pin 4 of the optocoupler chip U5 outputs the PE_OK_2 signal through resistor R16;

[0015] Pin 3 of the rectifier bridge chip V1 is connected to one end of the parallel capacitors C1 and C2. The other ends of the parallel capacitors C1 and C2 are connected to pin 1 of the optocoupler chip U1 after being connected in series with resistor R2. Pin 1 of the optocoupler chip U1 is connected to the negative terminal of the cascaded photodiode D1. The positive terminal of the photodiode D1 is connected to pin 2 of the optocoupler chip U1. Pin 3 of the optocoupler chip U1 is grounded. Pin 4 of the optocoupler chip U1 is connected to a 3.3V voltage through resistor R1. Pin 3 of the optocoupler chip U1 is connected to pin 4 of the optocoupler chip U1 after being connected in series with capacitor C3 and resistor R3. The PE_OK_1 signal is output through resistor R3 from pin 4 of the optocoupler chip U1.

[0016] Preferably, the PE_OK_1 signal, the PE_OK_2 signal, and the AC_OK signal are combined to judge whether the new connection terminal is stably connected. When the PE_OK_1 signal changes from 1 to 0, a 5A5A verification code is sent by the wireless data link. After the data is inverted, the verification feedback data A5A5 is read through the CAN path of the communication link. The CAN path of the communication link based on the hardware connection of the connection component and the wireless data communication link based on the wireless module are mutually backed up.

[0017] Preferably, the monitoring component is used to implement power supply detection and ground detection. The power supply detection and ground detection are judged by detecting the voltage states of the live wire, neutral wire, and ground wire when the connection component is in the connected state. It is required that the voltage between the live wire and the neutral wire is the voltage value provided by the mains power supply, the voltage between the live wire and the ground wire is within ±6V of the voltage provided by the mains power supply, and the voltage between the neutral wire and the ground wire is within ±6V.

[0018] Preferably, the model of the rectifier bridge chip V1 is GBU8K, and the models of the optocoupler chips U1, U2, and U5 are all CPC1301GR; the models of the voltage reference chips U3 and U4 are both TL432BSA.

[0019] Beneficial effects: The present invention realizes reliable grounding, power supply connection, potential balance of different components, and in-place detection function of the movement of the connection component by designing three terminal groups with different lengths, ensuring the electrical safety of the equipment and operators; the ground detection ensures the electrical safety during high-power charging of the high-voltage battery pack of the rotating component; the power supply switching control of the rotor component ensures that when the equipment is in the idle state, the high-voltage battery pack of the rotating component is completely no-load, ensuring that the power in the battery pack is used for the scanning operation of the computed tomography scanner to the greatest extent, which can extend the exposure working time, effectively reduce the battery pack capacity, and is beneficial to the miniaturization of the equipment. Description of the Drawings

[0020] Figure 13D schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is Figure 1 top view schematic diagram;

[0022] Figure 3 is Figure 1 exploded view;

[0023] Figure 4 Schematic diagram of the circuit structure of the monitoring component of the present invention;

[0024] Figure 5 Schematic diagram of the communication link of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the present invention applied to a computed tomography scanner;

[0026] Figure 7 is Figure 6 bottom top view;

[0027] Among them, 1 is the connection component, 2 is the monitoring component, 10 is the plug terminal group, 10a is the plug terminal A, 10b is the plug terminal B, 10c is the plug terminal C, 20 is the joint terminal group, 20a is the joint terminal A, 20b is the joint terminal B, 20c is the joint terminal C, 30 is the drive component, 31 is the drive motor, 32 is the adapter, 33 is the lead screw, 34 is the connecting sleeve, 35 is the guide rod, 40 is the guide pin, 51 is the bottom plate, 52 is the first mounting plate, 53 is the second mounting plate, 60 is the connecting plate, 61 is the guide groove. Detailed implementation mode

[0028] The following further explains and illustrates a new type of connection terminal for a computed tomography scanner according to this solution with reference to the accompanying drawings.

[0029] As shown in Attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 6 and Attachment Figure 7 shown, a new type of connection terminal for a computed tomography scanner includes a connection component 1 and a monitoring component 2; the connection component is arranged at the bottom of the computed tomography scanner and is used for the physical connection between the fixed component and the rotating component of the computed tomography scanner, serving as the CAN path of the communication link; the monitoring component 2 is used for the electrical connection between the fixed component and the rotating component of the computed tomography scanner, serving as a wireless data communication link; different lengths of wiring terminals are provided in the connection component 1, which are respectively used for power supply connection, communication connection, and ground connection; the monitoring component 2 is connected to the connection component 1 through a cable.

[0030] The connection component is a connection mechanism with a unique structure and is located at the bottom of the computed tomography scanner. The monitoring component is the electrical circuit part that matches the connection component and can be placed in an appropriate part according to the overall mechanism design of the computed tomography scanner. The position schematic diagram is as shown in the appendix Figure 6 as shown. The specific implementation schematic diagram of the connection of the connection component is as shown in the appendix Figure 7 as shown. Install the communication link CAN path and the wireless data communication link to realize the data inter - transmission between the fixed parts and the rotating parts of the computed tomography scanner; ensure that when there is an abnormal contact in the communication link CAN path, the wireless data communication link can still be used normally to ensure that the data information of the rotating parts can be uploaded to the host computer. In this solution, two links are provided and implemented for mutual backup to improve the reliability of data communication.

[0031] As shown in the appendix Figure 2 and the appendix Figure 3 as shown, the connection component includes a driving component 30, a bottom plate 51, a first mounting plate 52, a second mounting plate 53, a connector terminal group 20, and a plug terminal group 10; the bottom plate 51 is fixedly arranged on the fixed part of the computed tomography scanner, one end of the bottom plate 51 fixedly mounts the first mounting plate 52, the driving component 30 passes through the first mounting plate 52, one end of the driving component 30 is fixedly provided with a plug terminal group 10, and the plug terminal group 10 is connected to the electrical performance devices in the fixed part of the computed tomography scanner; the second mounting plate 53 is fixedly arranged on the rotating part of the computed tomography scanner, the second mounting plate 53 fixedly arranges the connector terminal group 20 through a connecting plate 60, and the connector terminal group 20 is connected to the electrical performance devices in the rotating part of the computed tomography scanner; the driving component 30 is used to drive the plug terminal group 10 to move so that the plug terminal group 10 approaches or moves away from the connector terminal group 20, so that the plug terminal group 10 is electrically connected or disconnected from the connector terminal group 20.

[0032] The driving component 30 includes a driving motor 31, a transfer piece 32, a lead screw 33, and a connecting sleeve 34; the lead screw 33 passes through the first mounting plate 52, one end of the lead screw 33 is connected to the driving motor 31, the other end is sleeved with the connecting sleeve 34 and then connected to the transfer piece 32, and the plug terminal group 10 is fixed on the transfer piece 32. The driving motor 31 controls the movement of the lead screw 33 to make the plug terminal group 10 approach or move away from the connector terminal group 20;

[0033] The first mounting plate 52 is also provided with a guide rod 35, and the transfer piece 32 is provided with a guide hole for the guide rod 35. When the lead screw 33 is connected to the transfer piece 32, the guide rod 35 is inserted into the guide hole.

[0034] One end of the second mounting plate 53 is further provided with a guiding groove 61, and a guiding pin 40 is arranged on the adapter 32. When the plug terminal group 10 is electrically connected to the joint terminal group 20, the guiding pin 40 is inserted into the guiding groove 61.

[0035] In the present invention, the bottom plate 51 can serve as a supporting carrier for the plug terminal group 10 and the driving assembly 30. Correspondingly, the bottom plate 51 can be fixedly arranged in a fixed component of a computed tomography scanner. The driving assembly 30 can be mounted on the bottom plate 51 through the first mounting plate 52, and the plug terminal group 10 is connected to the driving assembly 30. Thus, the driving assembly 30 and the plug terminal group 10 can be mounted in the fixed component. The joint terminal group 20 can be fixedly mounted in a rotating component of the computed tomography scanner through the second mounting plate 53.

[0036] The driving assembly 30 is connected to the plug terminal group 10. The driving assembly 30 is used to drive the plug terminal group 10 to move, so that the plug terminal group 10 approaches or moves away from the joint terminal group 20, thereby electrically connecting or disconnecting the plug terminal group 10 and the joint terminal group 20.

[0037] The plug terminal group 10 and the driving assembly 30 can be mounted in a fixed component of a computed tomography scanner, and the plug terminal group 10 is electrically connected to an electrical performance device in the fixed component. The joint terminal group 20 is mounted in a rotating component of the computed tomography scanner, and the joint terminal group 20 is electrically connected to an electrical performance device in the rotating component. When the driving assembly 30 drives the plug terminal group 10 to be electrically connected to the joint terminal group 20, electrical connection between the fixed component and the rotating component can be achieved, which can be used for power transmission, data transmission, etc. between the fixed component and the rotating component.

[0038] The plug terminal group 10 is several groups of wiring terminals with different lengths, including a plug terminal A10a, a plug terminal B10b, and a plug terminal C10c; the plug terminal A10a, the plug terminal B10b, and the plug terminal C10c are respectively used for power supply connection, communication connection, and grounding connection; the joint terminal group 20 is several spring pieces, including a joint terminal A20a, a joint terminal B20b, and a joint terminal C20c, and the number of wiring terminals is the same as the number of spring pieces; among them, the length of the wiring terminal of the plug terminal A10a for power supply connection is greater than that of the plug terminal B10b for communication connection, and the length of the wiring terminal of the plug terminal A10a for power supply connection is less than that of the plug terminal C10c for grounding connection.

[0039] The present invention realizes reliable grounding, power supply connection, potential balance of different components, and in-place detection function of the movement of the connection component by designing a plug terminal group with three different lengths, ensuring the electrical safety of the equipment and operators; the grounding detection ensures the electrical safety during high-power charging of the high-voltage battery pack of the rotating component; the power supply switching control of the rotor component ensures that when the equipment is in an idle state, the high-voltage battery pack of the rotating component is completely no-load, ensuring that the power in the battery pack is used for the scanning operation of the computed tomography scanner to the greatest extent, which can extend the exposure working time, effectively reduce the battery pack capacity, and facilitate the miniaturization of the equipment.

[0040] In some embodiments of the present invention, three wiring terminal groups with different lengths are adopted. Among them, the wiring terminal group for grounding connection includes a wiring terminal 6#, which has the longest length; the wiring terminal group for power supply connection includes two wiring terminals 1# and 2#, which have the medium length; the wiring terminal group for communication connection includes three wiring terminals 3#, 4# and 5#, which have the shortest length.

[0041] During the use of the present invention, when connecting the fixed component of the computed tomography scanner and the rotating component of the computed tomography scanner, the wiring terminal 6# first makes contact and closes, ensuring that the grounding point is reliably connected before the interfaces of the fixed component and the rotating component are docked, and the electric potential of the ground potential is the same, thus avoiding the above-mentioned situations of machine damage and personnel injury; secondly, the wiring terminals 1# and 2# then make contact and close to realize power supply; finally, the wiring terminals 3#, 4# and 5# make contact and close. By detecting the communication state between the fixed component and the rotating component, it is judged whether the wiring terminals 3#, 4# and 5# are in full contact. If they are in full contact, it can ensure that the other wiring terminals are reliably in contact.

[0042] In this solution, the connection component can be used in a computed tomography scanner. The structural design of the connection component includes three terminal groups with different lengths, and this design ensures functions such as reliable grounding, power supply connection, potential balance of different components, and in-place detection of the movement of the connection component. The electrical detection and control method based on the new connection terminal provided by the present invention can improve the electrical safety performance of the computed tomography scanner, the reliability of communication, and is beneficial to the energy saving of the high-voltage lithium battery pack in the rotating component, reducing the later maintenance cost of the computed tomography scanner.

[0043] The monitoring component 2 is used to realize power supply detection and grounding detection. The power supply detection and grounding detection are mainly judged by detecting the voltage states of the live wire, neutral wire and ground wire when the connection terminals of the fixed component and the rotating component of the computed tomography scanner are in a connected state; it is required that the voltage between the live wire and the neutral wire is the voltage value provided by the mains power supply, generally 220V AC, the voltage between the live wire and the ground wire is the mains power supply voltage ±6V, generally within the range of 220V AC ±6V, and the voltage between the neutral wire and the ground wire is within the range of ±6V.

[0044] As shown in the Figure 4 accompanying figure, the monitoring component 2 includes a rectifier bridge chip V1, an optocoupler chip U1, an optocoupler chip U2, a voltage reference chip U3, a voltage reference chip U4, and an optocoupler chip U5; the model of the rectifier bridge chip V1 is GBU8K, and the models of the optocoupler chip U1, the optocoupler chip U2, and the optocoupler chip U5 are all CPC1301GR; the models of the voltage reference chip U3 and the voltage reference chip U4 are both TL432BSA;

[0045] Pin 1 of the rectifier bridge chip V1 is connected to pin 1 of the optocoupler chip U2 after being serially connected with resistors R4 and R5. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through serially connected resistors R8, R10, and R13. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through serially connected resistors R9, R11, and R14. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through parallel-connected resistors R12 and photodiode D3. Pin 4 of the rectifier bridge chip V1 is connected to pin 3 of the voltage reference chip U4. Pin 3 of the voltage reference chip U4 is connected to pin 1 of the voltage reference chip U4 through serially connected resistors R13 and R10. Pin 3 of the voltage reference chip U4 is connected to pin 2 of the voltage reference chip U4 through capacitor C6. Pin 3 of the voltage reference chip U4 is connected to pin 2 of the voltage reference chip U4 through serially connected resistors R14 and R11. Pin 2 of the voltage reference chip U4 is connected to pin 1 of the voltage reference chip U3. Pin 3 of the voltage reference chip U4 is connected to pin 3 of the voltage reference chip U3. Pin 2 of the voltage reference chip U3 is connected to pin 1 of the optocoupler chip U2 through cascaded photodiode D2 and resistor R5. Pin 2 of the voltage reference chip U3 is connected to pin 2 of the optocoupler chip U2. Pin 2 of the optocoupler chip U2 is connected to pin 1 of the optocoupler chip U2 through capacitor C4 and resistor R5; Pin 3 of the optocoupler chip U2 is grounded. Pin 4 of the optocoupler chip U2 is connected to 3.3V voltage through resistor R6. Pin 3 of the optocoupler chip U2 is connected to pin 4 of the optocoupler chip U2 after being serially connected with capacitor C5 and resistor R7. Pin 4 of the optocoupler chip U2 outputs the AC_OK signal through resistor R7;

[0046] Pin 2 of the rectifier bridge chip V1 is connected to one end of the parallel capacitors C7 and C8. The other ends of the parallel capacitors C7 and C8 are connected to the negative terminal of the photodiode D5 after being connected in series with the resistor R15. The positive terminal of the photodiode D5 is connected to pin 1 of the optocoupler chip U5. Pin 1 of the optocoupler chip U5 is connected to the negative terminal of the cascaded photodiode D4. The positive terminal of the photodiode D4 is connected to pin 2 of the optocoupler chip U5. Pin 3 of the optocoupler chip U5 is grounded. Pin 4 of the optocoupler chip U5 is connected to 3.3V voltage through the resistor R17. Pin 3 of the optocoupler chip U5 is connected to pin 4 of the optocoupler chip U5 after being connected in series with the capacitor C9 and the resistor R16. The PE_OK_2 signal is output through the resistor R16 at pin 4 of the optocoupler chip U5;

[0047] Pin 3 of the rectifier bridge chip V1 is connected to one end of the parallel capacitors C1 and C2. The other ends of the parallel capacitors C1 and C2 are connected to pin 1 of the optocoupler chip U1 after being connected in series with the resistor R2. Pin 1 of the optocoupler chip U1 is connected to the negative terminal of the cascaded photodiode D1. The positive terminal of the photodiode D1 is connected to pin 2 of the optocoupler chip U1. Pin 3 of the optocoupler chip U1 is grounded. Pin 4 of the optocoupler chip U1 is connected to 3.3V voltage through the resistor R1. Pin 3 of the optocoupler chip U1 is connected to pin 4 of the optocoupler chip U1 after being connected in series with the capacitor C3 and the resistor R3. The PE_OK_1 signal is output through the resistor R3 at pin 4 of the optocoupler chip U1;

[0048] The capacitors C1, C2, C7 and C8 are safety capacitors, and the detection current can be adjusted by adjusting the capacitance value, which can meet the requirements of the ground leakage current of the computed tomography scanner. The photodiode D4 can limit the voltage between the neutral line and the ground line. The resistors R8, R10, R13, R9, R11, R14, the voltage reference chip U3 and the voltage reference chip U4 limit the AC input voltage between 150V and 286V.

[0049] The PE_OK_1 signal, the PE_OK_2 signal and the AC_OK signal are combined to judge whether the new connection terminal is stably connected. The detection table of the corresponding power supply state and grounding state is as follows:

[0050] PE_OK_1 PE_OK_2 AC_OK Status 0 (Low level) 1 (High level) 0 (Low level) Normal 1 (High level) 1 (High level) 0 (Low level) Ground wire floating 0 (Low level) 0 (Low level) 0 (Low level) Poor ground wire 1 (High level) 1 (High level) 1 (High level) Abnormal AC status

[0051] In the present invention, when the PE_OK_1 signal changes from 1 to 0, the 5A5A verification code is sent by the wireless data link. After the data is inverted, the verification feedback data A5A5 is read through the CAN path of the communication link. The CAN path of the communication link based on the hardware connection of the connection component and the wireless data communication link based on the wireless module are mutually backed up.

[0052] Under the normal conditions of the above-mentioned AC power supply and protective earthing detection, the rotating component will turn on the AC power supply circuit. During this period, the AC power supply and the high-voltage battery pack of the rotor component jointly supply power to the rotor component; this solution ensures the electrical safety of the equipment and operators; the earthing detection ensures the electrical safety during the high-power charging of the high-voltage battery pack of the rotating component; the power supply switching control of the rotor component ensures that when the equipment is in the idle state, the high-voltage battery pack of the rotating component is completely no-load, ensuring that the power in the battery pack is used for the scanning operation of the computed tomography scanner to the greatest extent, which can extend the exposure working time, effectively reduce the battery pack capacity, and is conducive to the miniaturization of the equipment.

[0053] When the battery pack of the above-mentioned rotor component and the AC mains supply power to the rotor component together and provide energy storage for the power-down delay circuit at the same time, after delaying for a certain time, the battery pack power supply is turned off, and the high-voltage battery pack on the rotor component is completely no-load. At this moment, the high-voltage battery pack can be charged but does not discharge externally at all, ensuring that the battery pack will not experience power feed under long-term storage conditions;

[0054] When the rotating component is supplied with AC power provided by the fixed component as described above, if the trigger condition is a normal exposure operation behavior, first turn on the power supply circuit of the high-voltage battery pack of the rotating component, and then turn off the AC power supply circuit. After the above power supply switching is completed, then execute the operation behavior of the user;

[0055] When the rotating component is supplied with AC power provided by the fixed component as described above, if there is an abnormal AC power supply or poor contact of the connection components, the power supply of the rotating component is automatically switched to the high-voltage battery pack power supply, and at the same time, the delay circuit is started to monitor the power supply switching situation of the rotating component at this time.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that: for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A new type of connecting terminal for a computed tomography scanner, characterized in that: It includes a connection component (1) and a monitoring component (2); the connection component is arranged at the bottom of the computed tomography scanner and is used for the physical connection between the fixed component and the rotating component of the computed tomography scanner, serving as the CAN path of the communication link; the monitoring component (2) is used for the electrical connection between the fixed component and the rotating component of the computed tomography scanner, serving as the wireless data communication link; different lengths of terminal blocks are provided in the connection component (1), which are respectively used for power supply connection, communication connection, and ground connection; the monitoring component (2) is connected to the connection component (1) through a cable; The connection component includes a driving component (30), a bottom plate (51), a first mounting plate (52), a second mounting plate (53), a connector terminal group (20), and a plug terminal group (10); the bottom plate (51) is fixedly arranged on the fixed component of the computed tomography scanner, one end of the bottom plate (51) fixedly mounts the first mounting plate (52), the driving component (30) penetrates through the first mounting plate (52), and a plug terminal group (10) is fixedly arranged at one end of the driving component (30), and the plug terminal group (10) is connected to the electrical components in the fixed component of the computed tomography scanner; the second mounting plate (53) is fixedly arranged on the rotating component of the computed tomography scanner, the connector terminal group (20) is fixedly arranged on the second mounting plate (53) through a connecting plate (60), and the connector terminal group (20) is connected to the electrical components in the rotating component of the computed tomography scanner; the driving component (30) is used to drive the plug terminal group (10) to move, so that the plug terminal group (10) approaches or moves away from the connector terminal group (20), so that the plug terminal group (10) is electrically connected or disconnected from the connector terminal group (20); The plug terminal group (10) is several groups of terminal blocks with different lengths, including a plug terminal A (10a), a plug terminal B (10b), and a plug terminal C (10c); the plug terminal A (10a), the plug terminal B (10b), and the plug terminal C (10c) are respectively used for power supply connection, communication connection, and ground connection; the connector terminal group (20) is several spring pieces, including a connector terminal A (20a), a connector terminal B (20b), and a connector terminal C (20c), and the number of terminal blocks is the same as the number of spring pieces; among them, the terminal block length of the plug terminal A (10a) for power supply connection is greater than that of the plug terminal B (10b) for communication connection, and the terminal block length of the plug terminal A (10a) for power supply connection is less than that of the plug terminal C (10c) for ground connection.

2. The novel connection terminal of a computed tomography scanner according to claim 1, characterized in that: The driving component (30) includes a driving motor (31), an adapter (32), a lead screw (33), and a connecting sleeve (34); the lead screw (33) penetrates through the first mounting plate (52), one end of the lead screw (33) is connected to the driving motor (31), and the other end is sleeved with the connecting sleeve (34) and then connected to the adapter (32). A plug terminal group (10) is fixed on the adapter (32), and the driving motor (31) controls the movement of the lead screw (33) to make the plug terminal group (10) approach or move away from the joint terminal group (20).

3. The novel connection terminal of a computed tomography scanner according to claim 2, characterized in that: A guide rod (35) is further provided on the first mounting plate (52), and a guide hole for the guide rod (35) is provided on the adapter (32) for the guide rod (35) to be inserted into the guide hole when the lead screw (33) is connected to the adapter (32).

4. The novel connection terminal of a computed tomography scanner according to claim 2, characterized in that: A guide groove (61) is further provided at one end of the second mounting plate (53), and a guide pin (40) is provided on the adapter (32). The guide pin (40) is inserted into the guide groove (61) when the plug terminal group (10) is electrically connected to the joint terminal group (20).

5. The novel connection terminal of a computed tomography scanner according to claim 1, characterized in that: The monitoring component (2) includes a rectifier bridge chip V1, an optocoupler chip U1, an optocoupler chip U2, a voltage reference chip U3, a voltage reference chip U4, and an optocoupler chip U5; Pin 1 of the rectifier bridge chip V1 is connected to pin 1 of the optocoupler chip U2 after being serially connected with resistors R4 and R5. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through serially connected resistors R8, R10, and R13. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through serially connected resistors R9, R11, and R14. Pin 1 of the rectifier bridge chip V1 is connected to pin 4 of the rectifier bridge chip V1 through parallelly connected resistors R12 and photodiode D3. Pin 4 of the rectifier bridge chip V1 is connected to pin 3 of the voltage reference chip U4. Pin 3 of the voltage reference chip U4 is connected to pin 1 of the voltage reference chip U4 through serially connected resistors R13 and R10. Pin 3 of the voltage reference chip U4 is connected to pin 2 of the voltage reference chip U4 through capacitor C6. Pin 3 of the voltage reference chip U4 is connected to pin 2 of the voltage reference chip U4 through serially connected resistors R14 and R11. Pin 2 of the voltage reference chip U4 is connected to pin 1 of the voltage reference chip U3. Pin 3 of the voltage reference chip U4 is connected to pin 3 of the voltage reference chip U3. Pin 2 of the voltage reference chip U3 is connected to pin 1 of the optocoupler chip U2 through cascaded photodiode D2 and resistor R5. Pin 2 of the voltage reference chip U3 is connected to pin 2 of the optocoupler chip U2. Pin 2 of the optocoupler chip U2 is connected to pin 1 of the optocoupler chip U2 through capacitor C4 and resistor R5; Pin 3 of the optocoupler chip U2 is grounded. Pin 4 of the optocoupler chip U2 is connected to 3.3V voltage through resistor R6. Pin 3 of the optocoupler chip U2 is connected to pin 4 of the optocoupler chip U2 after being serially connected with capacitor C5 and resistor R7. Pin 4 of the optocoupler chip U2 outputs the AC_OK signal through resistor R7; Pin 2 of the rectifier bridge chip V1 is connected to one end of parallelly connected capacitors C7 and C8. The other end of the parallelly connected capacitors C7 and C8 is serially connected with resistor R15 and then connected to the negative terminal of the photodiode D5. The positive terminal of the photodiode D5 is connected to pin 1 of the optocoupler chip U5. Pin 1 of the optocoupler chip U5 is connected to the negative terminal of the cascaded photodiode D4. The positive terminal of the photodiode D4 is connected to pin 2 of the optocoupler chip U5. Pin 3 of the optocoupler chip U5 is grounded. Pin 4 of the optocoupler chip U5 is connected to 3.3V voltage through resistor R17. Pin 3 of the optocoupler chip U5 is connected to pin 4 of the optocoupler chip U5 after being serially connected with capacitor C9 and resistor R16. Pin 4 of the optocoupler chip U5 outputs the PE_OK_2 signal through resistor R16; Pin 3 of the rectifier bridge chip V1 is connected to one end of the parallel capacitors C1 and C2. The other ends of the parallel capacitors C1 and C2 are connected to pin 1 of the optocoupler chip U1 after being connected in series with resistor R2. The negative terminal of the cascaded photodiode D1 is connected to pin 1 of the optocoupler chip U1, and the positive terminal of the photodiode D1 is connected to pin 2 of the optocoupler chip U1. Pin 3 of the optocoupler chip U1 is grounded. Pin 4 of the optocoupler chip U1 is connected to the 3.3V voltage through resistor R1. Pin 3 of the optocoupler chip U1 is connected to pin 4 of the optocoupler chip U1 after being connected in series with capacitor C3 and resistor R3. The PE_OK_1 signal is output through resistor R3 from pin 4 of the optocoupler chip U1.

6. The novel connection terminal of a computed tomography scanner according to claim 5, characterized in that: The PE_OK_1 signal, PE_OK_2 signal and AC_OK signal are combined to judge whether the new connection terminal is stably connected. When the PE_OK_1 signal switches from 1 to 0, the 5A5A verification code is sent by the wireless data link. After the data is inverted, the verification feedback data read through the CAN path of the communication link is A5A5. The CAN path of the communication link based on the hardware connection of the connection component and the wireless data communication link based on the wireless module are mutually backed up.

7. The novel connection terminal of a computed tomography scanner according to claim 5, characterized in that: The monitoring component (2) is used to implement power supply detection and ground detection, and the power supply detection and ground detection are judged by detecting the voltage states of the live wire, neutral wire and ground wire when the connection component (1) is in the connected state. It is required that the voltage between the live wire and the neutral wire is the voltage value provided by the mains supply, the voltage between the live wire and the ground wire is within the range of the voltage provided by the mains supply ±6V, and the voltage between the neutral wire and the ground wire is within the range of ±6V.

8. A novel connection terminal of a computed tomography scanner according to claim 5, characterized in that: The model of the rectifier bridge chip V1 is GBU8K, and the models of the optocoupler chips U1, U2 and U5 are all CPC1301GR; the models of the voltage reference chips U3 and U4 are both TL432BSA.

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