Detection device for inverter of Philips DR high-voltage generator

Abstract

The utility model belongs to the technical field of digital X-ray radiography (DR) machines, and particularly relates to a detection device for an inverter of a Philips DR high-voltage generator, which comprises an input detection device, an output detection device and an output detection device, the positive electrode of the LED1 is connected with a pin 14 of a 25-pin connector of the inverter, the positive electrode of the LED2 is connected with a pin 15 of the 25-pin connector of the inverter, the positive electrode of the LED3 is connected with a pin 16 of the 25-pin connector of the inverter, and the positive electrode of the LED4 is connected with a pin 17 of the 25-pin connector of the inverter; the negative electrodes of the LED1, the LED2, the LED3 and the LED4 are all connected with a pin 19 of a 25-pin connector of the inverter; the output detection device comprises a voltage division circuit and an LED lamp group; the voltage division circuit is formed by connecting a 10K resistor and a 100ohm resistor in series; a clamp at one end of the 10K resistor is clamped at the output end of the inverter, and the LED lamp group is connected in parallel with the 100ohm resistor. According to the utility model, whether the inverter of the high-voltage generator works normally or not can be rapidly determined, the fault of the high-voltage generator can be rapidly found out, and the high-voltage generator has a good market application prospect.

Description

Technical Field

[0001] The utility model belongs to the technical field of digital X-ray photography DR machines, and in particular relates to a detection device for an inverter of a Philips DR high-voltage generator. Background Art

[0002] Philips DR is a type of digital X-ray DR machine. Digital X-ray DR machine is an advanced X-ray photography technology formed by combining computer digital image processing technology with X-ray radiation technology. It is based on the original diagnostic X-ray machine direct film imaging, through A / D conversion box D / A conversion, real-time image digital processing, and then the image is digitized. DR has the characteristics of clear image quality, fast imaging speed, and low radiation, and has become the mainstream digital equipment in modern radiology.

[0003] Digital X-ray DR machines usually consist of mechanical devices, ray generators, detectors, and acquisition workstations. Mechanical devices include U-arms, UC arms, double columns, and suspension types, which are used to support X-ray generators and detectors, as well as to directly perform digital X-ray photography under computer control. The ray generator includes an X-ray tube and a high-voltage generator, which are the core components of X-ray generation and play a vital role in the generation of X-rays, directly affecting the stability of the overall performance of the DR equipment. The detector is used to receive and convert X-rays, and directly convert X-ray image information into digital image information. The quality of the detector determines the quality of the images generated by the system. The acquisition workstation is assembled by a computer and related control software, and is a system control platform, image processing platform, and patient data management platform.

[0004] As the core component of Philips DR, the high-voltage generator is usually composed of a high-voltage control part, an inverter, a high-voltage oil tank, and a rotating anode control box. The inverter is an important component of the high-voltage generator. It mainly rectifies the input three-phase 400-volt AC power supply into a 560-volt DC power supply. Then, under the control of the high-voltage control part, the IGBT or high-power field effect tube of the inverter is triggered by the pulse waveform to invert the DC into a high-frequency AC above 10 kHz and input it into the high-voltage oil tank. The inverter is a component of AC rectification and DC inversion. This component has a large current and a large power, so this component is more prone to failure. The exposure time of the DR machine is very short, usually within 10-300 milliseconds. Therefore, if there is no oscilloscope on site, it is difficult to capture the output voltage of the inverter, nor can it capture the input trigger pulse signal of the inverter. It is impossible to confirm whether it is a problem with the high-voltage control part or the high-voltage inverter itself. Therefore, a detection device is very needed to quickly determine whether the inverter of the high-voltage generator is working normally, quickly find out the fault of the high-voltage generator, and solve the problem.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The utility model aims to provide a detection device for the inverter of a Philips DR high voltage generator, so as to solve the problem that it is difficult to determine whether the inverter of the high voltage generator works normally.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A detection device for an inverter of a Philips DR high voltage generator, comprising:

[0009] The input detection device includes LED1, LED2, LED3 and LED4; the positive pole of LED1 is connected to pin 14 of the 25-pin connector of the inverter, the positive pole of LED2 is connected to pin 15 of the 25-pin connector of the inverter, the positive pole of LED3 is connected to pin 16 of the 25-pin connector of the inverter, and the positive pole of LED4 is connected to pin 17 of the 25-pin connector of the inverter; the negative poles of LED1, LED2, LED3 and LED4 are all connected to pin 19 of the 25-pin connector of the inverter;

[0010] The output detection device includes a voltage divider circuit and an LED light group; the voltage divider circuit is composed of a 10K resistor and a 100 ohm resistor connected in series; a clip at one end of the 10K resistor is clamped on the output end of the inverter, and the LED light group is connected in parallel to the 100 ohm resistor.

[0011] Since the exposure of the high-voltage generator of the DR machine is instantaneous, usually the exposure time is in the millisecond level. The exposure time is short, and the digital multimeter commonly used by engineers cannot capture useful waveform signals and cannot accurately determine whether there is a problem with the inverter in the high-voltage generator. Even if there is an oscilloscope on site, the ability of the on-site maintenance personnel is relatively high and the detection time is relatively long. The detection device of the inverter of the Philips DR high-voltage generator of the utility model can quickly and conveniently determine whether the inverter has input and output, quickly determine whether the inverter is faulty, and improve the efficiency and accuracy of detection.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The detection device for the inverter of the Philips DR high-voltage generator of the utility model has the characteristics of low cost and small size, is convenient to carry, is simple and quick to use, is easy to learn, is simple to operate, has intuitive detection, and is safe and efficient.

[0014] (2) The detection device for the inverter of the Philips DR high-voltage generator of the utility model has strong versatility. In addition to being used in Philips DR high-voltage generators, it can also be used in other brands of DR high-voltage generators to detect the output of the inverter and determine whether the output of the inverter is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the block diagram of the inverter;

[0016] Figure 2 It is a schematic diagram of the four input pulses of the inverter;

[0017] Figure 3 It is a schematic diagram of the output detection device of the utility model. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solution of the utility model patent. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The inverter block diagram is as follows: Figure 1 As shown in the attached Figure 1It can be seen that the function of the inverter is to rectify the input three-phase 400V AC power supply into a 560V DC power supply, and then under the control of the high-voltage control part, trigger the inverter's IGBT or high-power field-effect transistor through a pulse waveform to invert the DC into a high-frequency AC of more than 10 kHz and input it into the secondary high-voltage oil tank.

[0022] There are three groups of inputs to the inverter. One group is a three-phase 400-volt AC signal, which can be easily measured and judged with a multimeter; the other group is usually a 24-volt DC power supply, which is used for the inverter electronic components to work, and can also be measured and judged with a multimeter; there is also a group of high-voltage control components that are sent and input to the inverter to control the IGBT or field effect tube of the inverter to turn on and off. They are very high-frequency pulse signals and require an oscilloscope to measure. However, there is sometimes no oscilloscope on site. In addition, the oscilloscope is very large and not convenient to carry. The inverter usually has four trigger waveforms, and the LED indicator can be used to detect these trigger waveforms. As long as there is a pulse, the LED light will flash. When you see the LED light flashing, you can determine that a trigger pulse is input, which means that the pulse output signal output of the control part of the high-voltage generator is normal.

[0023] The utility model discloses a detection device for an inverter of a Philips DR high voltage generator, comprising an input detection device and an output detection device.

[0024] The input detection device includes LED1, LED2, LED3 and LED4. Figure 2 The inverter has four input pulses. We connect the positive pole of LED1 to pin 14 of the inverter's 25-pin connector, the positive pole of LED2 to pin 15, the positive pole of LED3 to pin 16, the positive pole of LED4 to pin 17, and the negative poles of the four LEDs to the signal ground at pin 19.

[0025] During exposure, the inverter input is attached Figure 2 When the waveform on the left is shown, the 4 LED lights of the input detection device will flash, indicating that the 4-way pulse signal input is normal. After testing, even with the minimum exposure time of 1 millisecond, the LED lights can be seen flashing. If the LED lights do not flash, it can be confirmed that there is no pulse input of the inverter, indicating that there is a problem with the high-voltage control part, and the problem of the inverter is ruled out; if the LED lights flash, and the other input signals and power supply of the inverter are normal, then it is necessary to confirm whether the output of the inverter is normal. If the output of the inverter is abnormal, it can be confirmed that the inverter is faulty, and the problem of the inverter can be quickly confirmed.

[0026] The output of the inverter is also an instantaneous signal. If you want to detect this signal, you also need to use an oscilloscope. If there is no oscilloscope on site, you can also use a voltage divider resistor and an LED light group to form an output detection device based on the working principle of the inverter to quickly confirm whether the inverter has output. The three inputs of the inverter are usually 400 volts AC, which is about 560V after rectification. Then the peak-to-peak value of the high-frequency AC voltage output of the inverter is 560 volts.

[0027] See attached Figure 3 The output detection device includes a voltage divider circuit and an LED light group. A 10K resistor and a 100 ohm resistor are connected in series to form a voltage divider circuit. The luminous LED light group is connected in parallel to the 100 ohm resistor. The clip at one end of the 10K resistor is clamped on the output of the inverter, and the negative end of the LED light group is clamped on the outer casing of the machine. When the exposure is normal, the LED light group will flash, indicating that the inverter output is normal; when the LED light group does not flash, it means that the inverter has no output, which may be an inverter failure.

[0028] In actual use, when the machine is turned off, connect the male and female 25-pin connectors of the inverter's trigger signal to the inverter's X1 connector, clip the red clip at one end of the inverter's output LED light group to the inverter's output connector, and clip the black clip at the other end of the LED light group to the machine's housing. Select the appropriate exposure time, 400 milliseconds, 5 milliseconds, and 1 millisecond exposure, and observe the 4 trigger signal LEDs at the inverter input and the LED light group at the output.

[0029] During normal exposure, the LED lights at the input and output ends of the inverter will flash. If the 4 trigger signal LEDs flash, but the LED light group at the output end of the inverter does not flash, it means that the inverter has a trigger signal, but no output power, indicating that the inverter itself is faulty and the inverter needs to be replaced to eliminate the problem; if the 4 trigger signal LEDs and the LED light group at the output end of the inverter do not flash, it means that the inverter has no trigger signal and the fault is not in the inverter, but in the control part before the inverter.

[0030] The detection device of the inverter of the Philips DR high-voltage generator of the utility model can quickly determine whether the inverter of the high-voltage generator is working normally and quickly detect the fault of the high-voltage generator by detecting the signals of the four-way trigger pulse input and output ends of the inverter and observing the flashing of the LED light to determine whether the signal exists. The utility model is very practical and has good market application prospects.

[0031] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A detection device for an inverter of a Philips DR high voltage generator, characterized in that: include: The input detection device includes LED1, LED2, LED3 and LED4; the positive pole of LED1 is connected to pin 14 of the 25-pin connector of the inverter, the positive pole of LED2 is connected to pin 15 of the 25-pin connector of the inverter, the positive pole of LED3 is connected to pin 16 of the 25-pin connector of the inverter, and the positive pole of LED4 is connected to pin 17 of the 25-pin connector of the inverter; the negative poles of LED1, LED2, LED3 and LED4 are all connected to pin 19 of the 25-pin connector of the inverter; The output detection device includes a voltage divider circuit and an LED light group; the voltage divider circuit is composed of a 10K resistor and a 100 ohm resistor connected in series; a clip at one end of the 10K resistor is clamped on the output end of the inverter, and the LED light group is connected in parallel to the 100 ohm resistor.

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