Integrated power control and protection device applied to parallel connection of multiple fixed X-ray machines

Abstract

The invention provides an integrated power control and protection device applied to parallel connection of a plurality of fixed X-ray machines. The device not only is used for controlling and protecting a single fixed medical X-ray machine, but also can monitor the operation of other fixed medical X-ray machines at the same time. When a plurality of fixed high-power medical X-ray machines are operated in parallel, the equipment can reduce the requirements of customers on a main power supply at a power grid side, protection equipment and infrastructures.

Description

Technical Field

[0001] The present invention relates to the technical field of X-ray machines, and in particular to an integrated power control and protection device applied to a plurality of fixed X-ray machines in parallel. Background Art

[0002] Fixed X-ray machines require a large amount of power from the grid when exposing. Usually, the power may exceed tens of kilowatts, or even more than one hundred kilowatts, but it remains in high-power working mode for a very short time. In most other time ranges, it remains in standby mode, at which time only a few kilowatts of power are required. The power control and protection unit of the X-ray machine must be designed according to the maximum power of the X-ray machine. When a customer has multiple high-power fixed X-ray machines, the connection structure of these machines is as follows: Figure 1 Typically, customers must update total power control and protection equipment and other infrastructure based on the sum of the maximum power of all high-power fixed X-ray machines.

[0003] The current power control and protection unit for multiple high-power fixed X-ray machines has some disadvantages. The current power control and protection unit is designed according to the maximum power of one fixed X-ray machine, which only considers the operating status and parameters of a single fixed X-ray machine. It does not consider the situation where customers need to install and operate multiple high-power fixed X-ray machines. The total power control and protection unit of the customer's power grid must be designed or updated for the sum of all the maximum powers of each fixed X-ray machine. This leads to very high costs for customers to upgrade their equipment and infrastructure, including applying for power expansion, updating power transformers, rewiring cables, updating power control and protection equipment, building new power distribution rooms, etc. Some customers with low budget plans even have to give up installing multiple X-ray machines. But in fact, the time an X-ray machine is exposed at high power is very short, even only a few milliseconds. In other time ranges, it remains in standby mode and only requires a few kilowatts. This leads to a huge waste of cost and time for customers to upgrade their infrastructure. Summary of the invention

[0004] In view of the above-mentioned deficiencies of the prior art, the present invention provides an integrated power control and protection device for multiple fixed X-ray machines in parallel, which is not only used to control and protect a single fixed medical X-ray machine, but also can monitor the operation of other fixed medical X-ray machines at the same time. When multiple fixed high-power medical X-ray machines are operated in parallel, the device can reduce the customer's requirements for the total power supply, protection equipment and infrastructure on the grid side.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] An integrated power control and protection device for parallel connection of multiple fixed X-ray machines includes customer-side power grid infrastructure and equipment, a customer-side total power control and protection unit, multiple fixed X-ray machines, and power control and protection units corresponding to each fixed X-ray machine. The working method of the device is as follows: at a certain moment, only one X-ray machine is allowed to be exposed; when the X-ray machine is required to be exposed, its corresponding power control and protection unit should first check whether there are other machines being exposed; if so, the power control and protection unit should prohibit this exposure until the exposure of other machines is completed; if not, it will allow this exposure and send a signal to other machines that this X-ray machine is being exposed.

[0007] Preferably, the specific steps of the working method include: when an X-ray machine is ready to expose, in addition to checking the exposure condition parameters of the machine, it also sends an exposure request signal "Rex(i)" to its own power control and protection unit; when the power control and protection unit receives the exposure request, it checks the exposure status signal "Exp(j)" sent by the power control and protection units of other X-ray machines to confirm whether there are other X-ray machines performing exposure; if no other X-ray machine is performing exposure, the power control and protection unit sets the signal "Enx(i)" to "1" to allow this exposure; if it is found that any other X-ray machine is performing exposure, the power control and protection unit sets the signal "Enx(i)" to "0" to prohibit this exposure, and then loops the query until no other X-ray machine is performing exposure, and then sets the exposure enable signal "Enx(i)" to "1" to allow this exposure; within the exposure time range, the power control and protection unit should set the exposure status signal "Exp(i)" to "1", and set it to "0" after the exposure is completed.

[0008] Beneficial effect: When multiple high-power fixed X-ray machines are operated in parallel, the new power control and protection unit designed by the present invention can control and protect a single high-power X-ray machine itself, and output the operating status information to the power control and protection units of other X-ray machines, such as Figure 2 In addition, it also monitors the operating status of other X-ray machines to control the exposure of the machine, thereby reducing the power requirements on the customer side grid and reducing the investment in power equipment and infrastructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a structural diagram of multiple fixed X-ray machines connected in parallel.

[0010] Figure 2 This is a structural diagram of multiple stationary X-ray machines connected in parallel with a new power control and protection unit.

[0011] Figure 3It is a schematic diagram of the parallel structure of multiple fixed X-ray machines with new power control and protection units and a protection signal relationship diagram.

[0012] Figure 4 Exposure signal control logic diagram for the power control and protection unit. DETAILED DESCRIPTION

[0013] The present invention is further explained below with reference to examples.

[0014] First, define the following variables:

[0015] E xp (i): Exposure status signal of the i-th X-ray machine. "1" means the machine is exposing, "0" means the machine is not exposing;

[0016] R ex (i): Exposure request signal of the i-th X-ray machine. "1" means the machine is requesting exposure, "0" means the machine has no exposure request;

[0017] E nx (i): Exposure enable signal of the i-th X-ray machine. “1” means the machine is allowed to expose, and “0” means the machine is not allowed to expose.

[0018] The present invention designs a new power control and protection unit for the situation where multiple high-power fixed X-ray machines are operated in parallel, which can control and protect a single high-power X-ray machine itself and output the operating status information to the power control and protection units of other X-ray machines, such as Figure 2 In addition, it also monitors the operating status of other X-ray machines to control the exposure of the machine, thereby reducing the power requirements on the customer side grid and reducing the investment in power equipment and infrastructure.

[0019] Each X-ray machine is equipped with a power control and protection unit. This unit can protect the X-ray machine according to the working status of its own X-ray machine and the working status of other X-ray machines, reducing the requirements on the power grid side. The power control and protection unit is implemented as follows:

[0020] The power control and protection unit is designed to allow only one X-ray machine to work in high power mode (exposure) at a time. When an X-ray machine is required to perform exposure, the power control and protection unit should first check whether there are other machines performing exposure. If so, the power control and protection unit should prohibit this exposure until the exposure of other machines is finished. If not, it will allow this exposure and send a signal to other machines that this X-ray machine is performing exposure.

[0021] This method allows only one high-powered fixed X-ray machine to be exposed at a time. Figure 3The main connections of several high power fixed X-ray machines are shown. These machines are equipped with a new power control and protection unit which is connected between the customer's power grid and the fixed X-ray machine.

[0022] Figure 4 The control logic flow chart in the unit when the X-ray machine is exposing is shown. First, when an X-ray machine is ready to expose, in addition to checking the exposure condition parameters of the machine, it should also send an exposure request signal "Rex(i)" to its own power control and protection unit. When the power control and protection unit receives the exposure request, it should check the exposure status signal "Exp(j)" sent by the power control and protection units of other X-ray machines to confirm whether there are other X-ray machines that are exposing. If no other X-ray machine is exposing, the power control and protection unit should set the signal "Enx(i)" to "1" to allow this exposure. If it is found that any other X-ray machine is exposing, the power control and protection unit should set the signal "Enx(i)" to "0" to prohibit this exposure, and then cyclically query until no other X-ray machine is exposing, and then set the exposure enable signal "Enx(i)" to "1" to allow this exposure. Within the exposure time range, the power control and protection unit should set the exposure status signal "Exp(i)" to "1" and set it to "0" after the exposure is completed.

Claims

1. An integrated power control and protection device for parallel connection of multiple fixed X-ray machines, comprising customer-side power grid infrastructure and equipment, a customer-side total power control and protection unit, multiple fixed X-ray machines, and power control and protection units corresponding to each fixed X-ray machine, characterized in that: The working method of the power integrated protection device for multiple parallel-connected X-ray machines is as follows: at a certain moment, only one X-ray machine is allowed to expose; when the X-ray machine is required to expose, its corresponding power control and protection unit first checks whether there are other X-ray machines that are exposing; if so, the power control and protection unit prohibits the exposure of this X-ray machine until the exposure of other X-ray machines is finished; if not, it will allow the exposure and send a signal to other machines that this X-ray machine is exposing.

2. The integrated power control and protection device for parallel connection of multiple fixed X-ray machines according to claim 1, characterized in that: The specific steps of the working method include: when an X-ray machine is ready to expose, in addition to checking the exposure condition parameters of the machine, it also sends an exposure request signal "Rex(i)" to its corresponding power control and protection unit; when the power control and protection unit receives the exposure request, it checks the exposure status signal "Exp(j)" sent by the power control and protection units of other X-ray machines to confirm whether there are other X-ray machines that are performing exposure; if no other X-ray machine is performing exposure, the power control and protection unit sets the signal "Enx(i)" to "1" to allow this exposure; if it is found that any other X-ray machine is performing exposure, the power control and protection unit sets the signal "Enx(i)" to "0" to prohibit this exposure, and then cyclically queries until no other X-ray machine is performing exposure, and then sets the exposure enable signal "Enx(i)" to "1" to allow this exposure; within the exposure time range, the power control and protection unit sets the exposure status signal "Exp(i)" to "1", and sets it to "0" after the exposure is completed; i and j represent the i-th and j-th X-ray machines respectively.

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