CN210019379U

CN210019379U - Medical X-ray machine framework based on CAN OPEN bus modularization

Info

Publication number: CN210019379U
Application number: CN201920367885.7U
Authority: CN
Inventors: 吴胜勇; 王政钧; 李仁攀; 田启源; 吴志敏; 骆世先
Original assignee: Chengdu Open Chart Medical System Technology Co Ltd
Current assignee: Chengdu Open Chart Medical System Technology Co Ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2020-02-07
Anticipated expiration: 2029-03-22

Abstract

The utility model discloses a medical X-ray machine framework based on CAN OPEN bus modularization, which comprises a main control system and a plurality of subsystems, wherein the main control system comprises a main CAN control module, the main CAN control module comprises a central controller, a main CAN transceiver and a main dial switch, the central controller is respectively connected with the main CAN transceiver and the main dial switch, and the main CAN transceiver is also connected with a CAN bus; the subsystem comprises a plurality of sub CAN control units, each sub CAN control unit comprises a sub CAN control module and a controlled feedback module, each sub CAN control module comprises a processor, a sub CAN transceiver and a sub dial switch, the processors are respectively connected with the controlled feedback modules, the sub dial switches and the sub CAN transceivers, and the sub CAN transceivers are also connected with a CAN bus. The utility model discloses with medical system neutron system modularization, and support the inside unit modularization of subsystem, be favorable to subsystem and inside unit renewal, do not influence other parts, can effectively protect surge and hot plug static simultaneously.

Description

Medical X-ray machine framework based on CAN OPEN bus modularization

Technical Field

The utility model relates to a medical treatment X-ray machine field specifically is a medical treatment X-ray machine framework based on CAN OPEN bus modularization.

Background

The medical X-ray machine is provided with a plurality of different functional units, including a scanning unit, an imaging unit, a mechanical movement unit, a power supply unit, various abnormality detection units and the like, which are controlled by a master control unit, and most of the medical X-ray machines adopt a centralized control framework. In addition, under the condition that the electronic equipment is interfered by surge and static electricity, instantaneous pulse signals with amplitudes far higher than rated values can appear at the power supply port, the communication port, the antenna port and the like of the electronic equipment, and the normal work of the equipment can be directly influenced, and even the equipment is burnt. For the communication port, the communication port has the characteristics of quickness, high speed, low voltage, plug and play and the like, and the protection of the communication port is a precondition for ensuring smooth, complete and safe data transmission.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve prior art's above-mentioned problem, provide a medical treatment X-ray machine framework based on CAN OPEN bus modularization, it adopts CAN bus framework, with subsystem modularization, but also support the inside unit modularization of subsystem, is favorable to each subsystem among the medical system, the inside unit renewal of subsystem, does not influence other parts, CAN effectively protect surge and hot plug static in addition.

The purpose of the utility model is mainly realized through the following technical scheme:

a medical X-ray machine framework based on CAN OPEN bus modularization comprises a main control system and a plurality of subsystems, wherein the main control system is a main CAN control module, the main CAN control module comprises a central controller, a main CAN transceiver and a main dial switch, the central controller is respectively connected with the main CAN transceiver and the main dial switch, and the main CAN transceiver is also connected with a CAN bus;

the subsystem comprises a plurality of sub CAN control units, each sub CAN control unit comprises a sub CAN control module and a controlled feedback module, each sub CAN control module comprises a processor, a sub CAN transceiver and a sub dial switch, the processor is respectively connected with the controlled feedback module, the sub dial switches and the sub CAN transceivers, and the sub CAN transceivers are also connected with a CAN bus;

the main dial switch and the sub dial switch are respectively used for endowing the main CAN control module and the sub CAN control module with determined IDs, and the IDs are used as identifiers when the main CAN control module and the sub CAN control module are communicated; the main CAN transceiver and the sub CAN transceivers are respectively connected with the CAN bus through at least one interface circuit, the interface circuit comprises a matching resistor R1 and a switch S1, and the switch S1 is used for flexibly adjusting the number of the sub systems and the sub CAN control units.

Preferably, an interface protection circuit is further connected between the interface circuit and the CAN bus, the interface protection circuit includes a primary protection circuit and a secondary protection circuit, the primary protection circuit includes gas discharge tubes GDT1 and GDT2, and inductors L1 and L2, and is used for protecting against common mode surge and differential mode surge; the diode protection circuit comprises a bridge circuit consisting of a unidirectional TVS diode D5, a high-speed diode D1, a diode D2, a diode D3 and a diode D4 and is used for protecting bidirectional surge impact.

To sum up, the utility model discloses following beneficial effect has: 1. the CAN bus architecture is adopted, the subsystem and the internal units thereof are modularized, the large-scale production is facilitated, the cost is reduced, the interface circuit connects the matching resistor R1 to the CAN bus through the switch S1, and the adjustment of the subsystem and the internal units thereof is more convenient. 2. Through one-level protection circuit and second grade protection circuit among the interface protection circuit, effectively protect common mode surge, differential mode surge and two-way surge to CAN be applicable to the surge protection of high low-speed CAN communication simultaneously, CAN also carry out electrostatic protection in addition to the live insertion and extraction.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a system block diagram of an embodiment of the present invention.

Fig. 2 is a schematic block diagram of a master CAN control module according to an embodiment of the present invention.

Fig. 3 is a schematic block diagram of a sub-CAN control unit according to an embodiment of the present invention.

Fig. 4 is a circuit diagram of an interface and a circuit diagram of an interface protection circuit according to an embodiment of the present invention.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1 to 3, a medical X-ray machine framework based on CAN OPEN bus modularization comprises a main control system and a plurality of subsystems, wherein the main control system is respectively connected with the plurality of subsystems, the main control system is a main CAN control module, the main CAN control module comprises a central controller, a main CAN transceiver and a main dial switch, the central controller is respectively connected with the main CAN transceiver and the main dial switch, and the main CAN transceiver is further connected with a CAN bus. The subsystem comprises a plurality of sub CAN control units, and each sub CAN control unit comprises a sub CAN control module and a controlled feedback module. The sub-CAN control module is similar to the main CAN control module in structure, the sub-CAN control module comprises a processor, a sub-CAN transceiver and a sub-dial switch, the processor is respectively connected with the controlled feedback module, the sub-dial switch and the sub-CAN transceiver, and the sub-CAN transceiver is also connected with a CAN bus.

It should be noted that the main control system, i.e. the main CAN control module, is a main control unit of the medical X-ray machine, and the subsystem is a functional unit of the medical X-ray machine and is controlled by the main CAN control module. The sub CAN control unit forming the subsystem controls a controlled feedback module responsible for specific functions, the controlled feedback module comprises a controlled device, a signal acquisition circuit and a signal conditioning circuit, the circuits are realized by adopting a conventional signal acquisition circuit structure and a signal conditioning circuit structure without specific description, and the controlled device CAN be a motor, a sensor, a brake, a clutch, an encoder, a limit switch, a key, a relay, a contactor and the like of a medical X-ray machine.

The main dial switch and the sub dial switch are respectively used for endowing the main CAN control module and the sub CAN control module with determined IDs as identifiers when the main CAN control module and the sub CAN control module communicate; the main CAN transceiver and the sub CAN transceivers are respectively connected with the CAN bus through at least one interface circuit, the interface circuit comprises a matching resistor R1 and a switch S1, and the switch S1 is used for flexibly adjusting the number of the sub systems and the sub CAN control units.

After the system is powered on, the processor determines the ID according to the sub dial switch, determines the controlled feedback module of specific application, calls a corresponding program to realize the function of the controlled feedback module, and simultaneously controls the sub CAN transceiver to report the ID, the capability, the function and the like of the sub CAN transceiver to the main CAN control module through the CAN bus. After the central controller of the main CAN control module counts the conditions of the sub CAN control modules, the configuration condition of the medical X-ray machine is known, and after receiving a user instruction, the central controller controls the main CAN transceiver to send an instruction to the sub CAN control modules of each subsystem through CAN communication, and controls the controlled feedback module to execute corresponding operation.

The medical X-ray machine subsystem and the internal units thereof are modularized by adopting a CAN bus architecture, so that the large-scale production is facilitated, the cost is reduced, the interface circuit connects the matching resistor R1 to the CAN bus through the switch S1, and the subsystem and the internal units thereof are more convenient to adjust. When the subsystem of the medical X-ray machine needs to be increased or decreased, the newly increased/original subsystem is connected/disconnected with the main control system through the CAN bus, and similarly, when the sub-CAN control units in the subsystem need to be increased or decreased, the newly increased/original sub-CAN control units are connected/disconnected with the subsystem through the CAN bus. When the subsystem function needs to be adjusted, the controlled feedback module of the sub-CAN control unit is started/stopped, and the corresponding switch S1 is opened/closed, so that the corresponding sub-CAN control unit is opened/connected to communicate with the CAN of the master control system. It should be noted that the CAN bus architecture may adopt a star connection or a daisy chain manner as needed, and a star connection is adopted in this embodiment.

An interface protection circuit is also connected between the interface circuit and the CAN bus, as shown in fig. 4, the interface protection circuit comprises a primary protection circuit and a secondary protection circuit, the primary protection circuit comprises gas discharge tubes GDT1 and GDT2, and inductors L1 and L2, and is used for protecting common mode surge and differential mode surge; the diode protection circuit comprises a bridge circuit consisting of a unidirectional TVS diode D5, a high-speed diode D1, a diode D2, a diode D3 and a diode D4 and is used for protecting bidirectional surge impact. Through one-level protection circuit and second grade protection circuit among the interface protection circuit, effectively protect common mode surge, differential mode surge and two-way surge to CAN be applicable to the surge protection of high-low speed CAN communication simultaneously.

The interface protection circuit further comprises an electrostatic impeder ESD1, an ESD1 with the model number PESD5V0S2BT, bidirectional TVS diodes TVS1 and TVS2, specifically, one end of a gas discharge tube GDT1 is connected with one end of a CAN bus CAN _ H and then connected with one end of a gas discharge tube GDT2 and one end of an inductor L1, the other end of a gas discharge tube GDT1 is connected with one end of a CAN bus CAN _ L and then connected with the other end of a gas discharge tube GDT2 and one end of an inductor L2, the third end of the gas discharge tube GDT1 is grounded, the other end of the inductor L1 is connected with the anode of a high-speed diode D1 and the cathode of a high-speed diode D2, and then connected with one end of a bidirectional TVS2, a pin 1 of the electrostatic impeder ESD1 and one end of a switch S1 and then connected with a main/sub CAN transceiver, the other end of the inductor L2 is connected with the anode of a high-speed diode D6867 and the cathode of a high-speed diode D3 and then connected with one end of a main/sub-TVS 1, the ESD1 pin 3 of the electrostatic resistor, the other ends of the two-way TVS diode TVS1 and TVS2 are all grounded, the cathode of the high-speed diode D1 is connected with the cathode of the high-speed diode D2 and then is connected with the cathode of the one-way TVS diode D5, and the anode of the high-speed diode D3 is connected with the anode of the high-speed diode D4 and then is connected with the anode of the one-way TVS diode D5. The gas discharge tube GDT1 and the gas discharge tube GDT2 are connected in parallel, and the better protection effect of common mode surge and differential mode surge is achieved. The bridge circuit composed of the unidirectional TVS diode D5, the high-speed diode D1, the D2, the D3 and the D4 plays a role in protecting bidirectional surge impact, one end of a CAN bus CAN _ H and one end of the CAN _ L are grounded through the bidirectional TVS diode TVS2 and the TVS1 respectively, so that the interface protection circuit is simultaneously suitable for high-speed and low-speed CAN communication, and the electrostatic impeder ESD1 CAN prevent the interference and damage of human static electricity to the CAN bus when the switch S1 is plugged in and unplugged from electricity.

Parts not described in the above modes can be realized by adopting or referring to the prior art.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary skilled person say, do not deviate from the utility model discloses a other embodiments that reach under the technical scheme all should be contained the utility model discloses a within the scope of protection.

Claims

1. The utility model provides a medical treatment X ray machine framework based on CAN OPEN bus modularization which characterized in that: the CAN bus control system comprises a master control system and a plurality of subsystems, wherein the master control system is a master CAN control module, the master CAN control module comprises a central controller, a master CAN transceiver and a master dial switch, the central controller is respectively connected with the master CAN transceiver and the master dial switch, and the master CAN transceiver is also connected with a CAN bus;

2. The CAN OPEN bus modular based medical X-ray machine architecture of claim 1, wherein: an interface protection circuit is also connected between the interface circuit and the CAN bus, the interface protection circuit comprises a primary protection circuit and a secondary protection circuit, the primary protection circuit comprises gas discharge tubes GDT1 and GDT2, and inductors L1 and L2 and is used for protecting common mode surge and differential mode surge; the diode protection circuit comprises a bridge circuit consisting of a unidirectional TVS diode D5, a high-speed diode D1, a diode D2, a diode D3 and a diode D4 and is used for protecting bidirectional surge impact.