A detection method, device and system for an AD conversion board of a CT detector

Abstract

The present invention provides a detection method, device and system for an AD conversion board of a CT detector. The device includes: an elastic housing, a probe array, a position sensor, a power unit and an electrical unit; a first groove structure is provided above the elastic housing, and the probe array is located in the first groove structure; the top of the first groove structure is used to embed test pads arranged opposite to the probe array; the power unit is used to provide power for the elastic housing; the electrical unit is communicatively connected to the position sensor and the power unit respectively; the electrical unit controls the power unit to provide power for the elastic housing so that the test pads are aligned and contacted with the probe array, and controls the power unit to stop moving until the detection result of the position sensor is received, generating a ready signal; the electrical unit collects excitation data from the signal interface of the AD conversion board based on the ready signal and the excitation signal generated by the user's selection. Thus, automatic detection of the AD conversion board is realized, and the test efficiency and test stability of the AD conversion board are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of CT detector detection, and particularly relates to a detection method, device and system for an AD conversion board of a CT detector. Background Art

[0002] A computer tomography (CT) detector is a key component for CT equipment imaging. As CT develops towards a wider field of view, multi-row detectors with 64 rows, 128 rows, and 256 rows are applied. The multi-row detectors are arranged by multiple detector modules in an array or matrix manner. The detector modules available for splicing generally adopt back-illuminated photodiodes, which are attached to the AD conversion board of the detector, and transmit the detected and converted electrical signals to the ASIC chip on the analog-to-digital (AD) conversion board, and then perform analog-to-digital conversion into serial digital signals and transmit them to the date acquisition system (DAS) of the CT for processing. The AD conversion board generally adopts a rigid-flex board or a flexible board. Due to the detector size limitation, the signals of each pixel of the photodiode (PD) are generally led out through extremely dense wiring. Because of the large wiring density, the wire diameter of the trace is very thin. And the ASIC chip generally adopts a ball grid array package with a very small pin pitch, or the ASIC bare chip is mounted by the chip on flex (COF) process. The production process of the AD conversion board is extremely difficult, with a high defect rate. Functional detection is a necessary means to examine whether the AD conversion board works properly.

[0003] Since there are up to hundreds of signal channels on the AD conversion board, the traditional testing method is that testers use test probes to contact each signal channel one by one to measure various functions, with extremely low efficiency, huge time costs, and it is easy to have deviations and omissions during manual contact, resulting in misdetection or missed detection, affecting the detection efficiency and detection rate of the AD conversion board, and thus causing a decline in production efficiency. Summary of the Invention

[0004] In view of the above problems existing in the prior art, embodiments of the present invention provide a detection method, device and system for an AD conversion board of a CT detector. This method can not only automatically align and contact the probe array with the test pads of the AD conversion board, but also perform automated signal excitation on the AD conversion board, and perform test evaluation based on the excitation data, effectively improving the test efficiency and test stability of the AD conversion board.

[0005] According to the first aspect of the embodiments of the present invention, a detection device for an AD conversion board of a CT detector is provided. The device includes: a detection unit, the detection unit includes: a probe array unit and a position sensor; the probe array unit includes an elastic housing and a probe array; the upper part of the elastic housing has a first groove structure, and the probe array is located in the first groove structure; the top of the first groove structure is used to embed a test pad of the AD conversion board disposed opposite to the probe array; the position sensor is used to detect the descending position of the AD conversion board and feed back the detection result to the electrical unit when it is determined that the AD conversion board descends to a preset position; a power unit for providing power to the elastic housing so that the elastic housing drives the test pad of the AD conversion board to move towards the probe array; an electrical unit, the electrical unit is communicatively connected to the detection unit and the power unit respectively; the electrical unit is used to control the power unit to provide power to the elastic housing so that the test pad is aligned and contacted with the probe array, and only controls the power unit to stop providing power when receiving the detection result of the position sensor, generating a ready signal; the electrical unit is further used to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and collect excitation data corresponding to the excitation signal from the signal interface of the AD conversion board.

[0006] Optionally, the electrical unit includes an acquisition unit, a signal excitation unit, and a control unit; the control unit is communicatively connected to the signal excitation unit, the acquisition unit, and the detection unit respectively; the signal excitation unit is communicatively connected to the probe array; it is used to generate an excitation signal and lead the excitation signal to the chip of the AD conversion board through the probe array; the acquisition unit is used to collect, through the signal interface of the AD conversion board, the excitation data generated by the chip of the AD conversion board corresponding to the excitation signal; the control unit is used to control the power unit to drive the AD conversion board to move downward so that the test pad is aligned and contacted with the probe array in the first groove structure; and only controls the power unit to stop moving when receiving the detection result of the position sensor, generating a ready signal; the control unit is further used to control the signal excitation unit to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and control the acquisition unit to collect, through the signal interface of the AD conversion board, the excitation data corresponding to the excitation signal.

[0007] Optionally, the detection unit further includes a positioning base; a second groove structure is provided on the positioning base; the second groove structure includes a first groove and a second groove; the probe array unit is installed in the first groove, and the position sensor is installed in the second groove; the power unit includes a motion mechanism and a pressing block; a pressing block is connected to the lower end of the motion mechanism, and a first protrusion and a second protrusion are provided at the lower end of the pressing block; the first protrusion cooperates with the first groove; the second protrusion cooperates with the second groove; the motion mechanism is configured to drive the pressing block to reciprocate in a direction perpendicular to the second groove structure; the position sensor is configured to detect the position of the test pad in the first groove; the control unit is configured to control the power mechanism to drive the pressing block to move downward based on a user request so that the test pad in the elastic housing is aligned and contacted with the probe array; and control the power mechanism to stop moving until it receives that the position sensor detects that the test pad reaches a preset position in the first groove, and generate a ready signal.

[0008] Optionally, the elastic housing is a closed housing formed by a first groove structure with an upward opening; the probe array is located in the first groove structure inside the elastic housing, and a plurality of through holes are provided on the elastic housing at the bottom of the first groove structure, and the probe array inside the elastic housing passes through the through holes to be aligned and contacted with the test pad.

[0009] According to a second aspect of an embodiment of the present invention, there is also provided a detection method for a CT detector AD conversion board, which is applied to a first device, including: controlling the power unit to drive the AD conversion board to move downward based on a user request, so that the AD conversion board is aligned and contacted with the probe array in the first groove structure; controlling the power unit to stop moving until receiving the detection result of the position sensor, and generating a ready signal; in response to the ready signal and the user's selection of the excitation signal channel, controlling the signal excitation unit to generate an excitation signal and then collecting, by the acquisition unit, excitation data corresponding to the excitation signal generated by the chip of the AD conversion board; performing a correction process on the excitation data to obtain corrected excitation data; retrieving an index parameter corresponding to the excitation signal from an index parameter table, and evaluating the qualification of the AD conversion board based on the index parameter and the corrected excitation data.

[0010] Optionally, the excitation signal at least includes a gain excitation signal, a noise excitation signal, and a linear excitation signal; the excitation data includes a gain data matrix corresponding to the gain excitation signal, a noise data matrix corresponding to the noise excitation signal, and a linear data matrix corresponding to the linear excitation signal.

[0011] Optionally, performing a correction process on the excitation data to obtain corrected excitation data, including: calculating a response mean vector in the time T direction for all gain data matrices A0(x, y, t). Obtaining a corrected gain matrix A1(x, y); calculating a response standard deviation vector S1 = stdev(S0(x, y, t)) in the time T direction for all noise data matrices S0(x, y, t), and obtaining a corrected noise matrix S1(x, y); calculating a mean vector in the time T direction for all linear data matrices N0(x, y, t). Obtaining a mean vector N1(x, y); obtaining a corrected linear matrix N2(x, y) based on the corrected gain matrix A1(x, y) and the mean vector N1(x, y) of the same signal channel; wherein, the gain data matrix A0(x, y, t), the noise data matrix S0(x, y, t), and the linear data matrix N0(x, y, t) are all used to indicate the data of a×b pixel channels on the AD conversion board. Each group of data corresponds to each moment t, with a total of T moments. x represents the x-th channel of the AD conversion board in the X direction, a is the total number of channels of the AD conversion board in the X direction, y represents the y-th channel of the AD conversion board in the Y direction, and b is the total number of channels of the AD conversion board in the Y direction.

[0012] Optionally, retrieving the index parameters corresponding to the excitation signal from the index parameter table, and evaluating the qualification of the AD conversion board based on the index parameters and the corrected excitation data, including: retrieving a gain parameter matrix corresponding to the gain excitation signal, a noise parameter matrix corresponding to the noise excitation signal, and a linear parameter matrix corresponding to the linear excitation signal from the index parameter table; determining that the gain excitation signal meets the preset requirements based on the corrected gain matrix and the gain parameter matrix; determining that the noise excitation signal meets the preset requirements based on the corrected noise matrix and the noise parameter matrix; determining that the linear excitation signal meets the preset requirements based on the corrected linear matrix and the linear parameter matrix; if the gain excitation signal, the noise excitation signal, and the linear excitation signal all meet the preset requirements, then determining that the AD conversion board is qualified.

[0013] Optionally, determining that the gain excitation signal meets a preset requirement based on the corrected gain matrix and the gain parameter matrix includes: for any gain data in the corrected gain matrix: obtaining the position information of the gain data in the corrected gain matrix, querying the corresponding gain parameter range from the gain parameter matrix, and determining whether the gain data is within the gain parameter range; if so, determining that the gain data meets the preset requirement; if each gain data in the corrected gain matrix meets the preset requirement, determining that the corrected gain matrix meets the preset requirement; if one of the gain data in the corrected gain matrix does not meet the preset requirement, determining that the corrected gain matrix does not meet the preset requirement.

[0014] According to the third aspect of the embodiments of the present invention, there is also provided a detection system for a CT detector AD conversion board, which is applied to a first device and includes: a first generation module, configured to control the power unit to drive the AD conversion board to move downward based on a user request, so that the AD conversion board is aligned and contacted with the probe array in the first groove structure; and controlling the power unit to stop moving until the detection result of the position sensor is received, and generating a ready signal; a second generation module, configured to control the signal excitation unit to generate an excitation signal and then collect excitation data corresponding to the excitation signal generated by the chip of the AD conversion board through the collection unit in response to the ready signal and the user's selection of the excitation signal channel; a calibration processing module, configured to perform calibration processing on the excitation data to obtain calibrated excitation data; an evaluation module, configured to retrieve the index parameters corresponding to the excitation signal from the index parameter table, and evaluate the qualification status of the AD conversion board based on the index parameters and the calibrated excitation data.

[0015] According to the fourth aspect of the embodiments of the present invention, there is also provided a computer-readable medium, on which a computer program is stored, and when the program is executed by a processor, the detection method described in the second aspect is implemented.

[0016] An embodiment of the present invention provides a detection device for an AD conversion board of a CT detector. The device includes: a detection unit, the detection unit includes: a probe array unit and a position sensor; the probe array unit includes an elastic housing and a probe array; the upper part of the elastic housing is in a first groove structure, and the probe array is located in the first groove structure; the top of the first groove structure is used to embed a test pad of the AD conversion board arranged opposite to the probe array; the position sensor is used to detect the descending position of the AD conversion board and feed back the detection result to the electrical unit when it is determined that the AD conversion board descends to a preset position; a power unit, used to provide power for the elastic housing so that the elastic housing drives the test pad of the AD conversion board to move towards the probe array; an electrical unit, the electrical unit is communicatively connected to the detection unit and the power unit respectively; the electrical unit is used to control the power unit to provide power for the elastic housing so that the test pad is aligned and contacted with the probe array, and only controls the power unit to stop providing power when receiving the detection result of the position sensor, generating a ready signal; the electrical unit is further used to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and collect excitation data corresponding to the excitation signal from the signal interface of the AD conversion board. Thus, the device of this embodiment can not only automatically align and contact the probe array with the test pad of the AD conversion board, but also perform automatic signal excitation on the AD conversion board, output excitation data, effectively improving the test efficiency and test stability of the AD conversion board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a detection device for an AD conversion board of a CT detector provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of an AD conversion board provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of the interaction between a probe array and a test pad provided by an embodiment of the present invention;

[0021] Figure 4 is an image of a probe array unit provided by an embodiment of the present invention;

[0022] Figure 5Schematic flow chart of a detection method for an AD conversion board of a CT detector provided by an embodiment of the present invention;

[0023] Figure 6 Schematic structural diagram of a detection system for an AD conversion board of a CT detector provided by an embodiment of the present invention.

[0024] Among them, probe array unit 10, AD conversion board 11, position sensor 12, motion mechanism 13, pressing block 14, acquisition unit 15, base 16, positioning base 17, test pads 110, signal interface 112, chip 111, spring housing 102, probe array 101. Specific embodiments

[0025] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As Figure 1 shown, it is a schematic structural diagram of a detection device for an AD conversion board of a CT detector provided by an embodiment of the present invention. As Figure 2 shown, it is a schematic structural diagram of an AD conversion board provided by an embodiment of the present invention; as Figure 3 shown, it is a schematic structural diagram of the interaction between a probe array and test pads provided by an embodiment of the present invention; as Figure 4 shown, it is an image of a probe array unit provided by an embodiment of the present invention.

[0027] A detection device for an AD conversion board of a CT detector, the device comprising: a detection unit, the detection unit comprising: a probe array unit 10 and a position sensor 12; the probe array unit 10, comprising an elastic housing 102 and a probe array 101; the upper part of the elastic housing 102 is in a first groove structure, and the probe array 101 is located in the first groove structure; the top of the first groove structure is used to embed a test pad 110 of the AD conversion board 11 arranged opposite to the probe array 101; the position sensor 12 is used to detect the descending position of the AD conversion board 11 and feed back the detection result to the electrical unit when it is determined that the AD conversion board 11 descends to a preset position; a power unit, used to provide power for the elastic housing 102 so that the elastic housing 102 drives the test pad 110 of the AD conversion board 11 to move towards the probe array 101; an electrical unit, the electrical unit is communicatively connected to the detection unit and the power unit respectively; the electrical unit is used to control the power unit to provide power for the elastic housing 102 so that the test pad 110 is aligned and in contact with the probe array 101, and only controls the power unit to stop providing power when receiving the detection result of the position sensor 12, generating a ready signal; the electrical unit is further used to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and collect excitation data corresponding to the excitation signal from a signal interface 112 of the AD conversion board 11.

[0028] As Figure 2 shown, specifically, the AD conversion board 11 comprises: a test pad 110 and a signal interface 112, and a chip 111 connected between the test pad 110 and the signal interface 112; the chip 111 can be an ASIC chip or other chips 111 capable of converting analog signals into digital signals.

[0029] The middle of the elastic housing 102 has a first groove structure with an upward opening, and a card slot is provided at the top of the first groove structure; the test pad 110 of the AD conversion board 11 is inserted into the card slot at the top of the first groove structure. At this time, the test pad 110 just covers the upper opening of the first groove structure and is arranged opposite to the probe array 101 in the first groove structure. The power unit provides power for the spring housing 102 so that the spring housing 102 can perform telescopic movement in the vertical direction; when the power unit provides power for the spring housing 102 to make the spring housing 102 move downward, the spring housing 102 will drive the test pad 110 to move downward together until the position sensor 12 detects that the test pad 110 has descended to a preset position. At this time, the test pad 110 is aligned and in contact with the probe array 101; the position sensor 12 feeds back the detection result to the electrical unit, and the electrical unit generates a ready signal and feeds it back to the user.

[0030] Based on the ready signal, the user selects options for the excitation signal channel; the electrical unit generates an excitation signal in response to the user's selection of the excitation signal channel options; the electrical unit guides the excitation signal to the chip 111 of the AD conversion board 11 through the probe array 101; the excitation signal is processed through the chip 111 of the AD conversion board 11 to obtain excitation data as a digital signal, and the excitation data is output through the acquisition unit 15.

[0031] Here, the specific structure of the elastic housing 102 is not limited, as long as it can drive the test pad 110 to move downward under the action of the power unit. The specific structure of the electrical unit is also not limited, as long as it can control the cooperation of the power unit and the detection unit so that the AD conversion board 11 can be detected. The specific structure of the power unit is also not limited in any way, as long as it can provide power for the elastic housing 102 so that the elastic housing 102 makes a reciprocating motion in the vertical direction.

[0032] The device of this embodiment can not only automatically align and contact the probe array 101 with the test pad 110 of the AD conversion board 11, but also perform automatic signal excitation on the AD conversion board 11 and output excitation data, effectively improving the test efficiency and test stability of the AD conversion board 11.

[0033] Such as Figure 3 and such as Figure 4 As shown, in the preferred embodiment of this embodiment, the elastic housing 102 is a closed housing formed by a first groove structure with an upward opening; the probe array 101 is located in the first groove structure inside the elastic housing 102, and several through holes are provided on the elastic housing 102 at the bottom of the first groove structure. The probe array 101 inside the elastic housing 102 passes through the through holes and aligns and contacts the test pad 110.

[0034] Specifically, the elastic housing 102 is a closed housing, and the upper surface housing of the closed housing is formed by a first groove structure with an upward opening in the middle. One end of the first groove structure extends to the port of the elastic housing 102. A probe array 101 is provided inside the elastic housing 102 directly below the first groove structure. Several through holes are provided on the elastic housing 102 at the bottom of the first groove structure (i.e., a part of the upper surface of the closed housing). When the elastic housing 102 is compressed downward, the probe array 101 inside the elastic housing 102 passes through the through holes and aligns and contacts the test pad 110. Thus, the elastic housing 102 can not only protect the probe array 101 from the influence of external forces, but also facilitate the alignment and contact between the probe array 101 and the test pad 110.

[0035] Here, for example: the elastic housing 102 can be an integrally formed flexible housing; or, the elastic housing 102 includes: a box body with an upward opening, a cover plate formed with a first groove structure with a downward depression, and a spring; the spring is arranged at each vertex angle of the box body, and the cover plate covers the box body and cooperates with the box body.

[0036] In a preferred embodiment of this embodiment, the electrical part includes a collection unit 15, a signal excitation unit, and a control unit; the control unit is respectively communicatively connected to the signal excitation unit, the collection unit 15, and the detection part; the signal excitation unit is communicatively connected to the probe array 101; it is used to generate an excitation signal and introduce the excitation signal to the chip 111 of the AD conversion board 11 through the probe array 101; the collection unit 15 is used to collect, through the signal interface 112 of the AD conversion board 11, the excitation data corresponding to the excitation signal generated by the chip 111 of the AD conversion board 11; the control unit is used to control the power part to drive the AD conversion board 11 to move downward so that the test pad 110 is aligned and in contact with the probe array 101 in the first groove structure; it stops the movement of the power part and generates a ready signal only until the detection result of the position sensor 12 is received; the control unit is also used to control the signal excitation unit to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and control the collection unit 15 to collect, through the signal interface 112 of the AD conversion board 11, the excitation data corresponding to the excitation signal.

[0037] The electrical part further includes a power supply, and the power supply is used to provide electrical energy for the detection part, the power part, the collection unit 15, the signal excitation unit, and the control unit.

[0038] Specifically, the signal excitation unit, the control unit, and the power supply are arranged in the base 16. The detection part, the power part, and the collection unit 15 are installed on the base 16. Here, the collection unit 15 can be a collection circuit board; the signal interface 112 of the AD conversion board 11 is electrically connected to the collection unit 15.

[0039] In this embodiment, the excitation signal generated by the signal excitation unit is introduced to the AD conversion board 11 through the probe array 101, and after being processed by the chip 111 on the AD conversion board 11, the excitation data corresponding to the excitation signal is output through the signal interface 112 of the AD conversion board 11; thus, automated signal excitation of the AD conversion board is beneficial for obtaining corresponding excitation data to test the AD conversion board 11, improving the test efficiency of the AD conversion board 11.

[0040] In a preferred embodiment of the present embodiment, the detection unit further includes a positioning base 17; a second groove structure is provided on the positioning base 17; the second groove structure includes a first groove and a second groove; the probe array unit 10 is installed in the first groove, and the position sensor 12 is installed in the second groove; the power unit includes a motion mechanism 13 and a pressing block 14; the lower end of the motion mechanism 13 is connected to the pressing block 14, and the lower end of the pressing block 14 is provided with a first protrusion and a second protrusion; the first protrusion cooperates with the first groove; the second protrusion cooperates with the second groove; the motion mechanism 13 is used to drive the pressing block 14 to reciprocate in a direction perpendicular to the second groove structure; the position sensor 12 is used to detect the position of the test pad 110 in the first groove; the control unit is used to control the power mechanism to drive the pressing block 14 to move downward based on a user request so that the test pad 110 in the elastic housing 102 is aligned and contacted with the probe array 101; until it receives that the position sensor 12 detects that the test pad 110 reaches a preset position in the first groove, it controls the power mechanism to stop moving and generates a ready signal.

[0041] Specifically, no specific limitations are imposed on the specific structures of the first protrusion and the second protrusion. For example: as long as the first protrusion can apply pressure to the periphery of the elastic housing 102, so that the elastic housing 102 can perform telescopic movement along the direction of the probe array 101.

[0042] The first groove and the second groove have the same depth, and the first protrusion and the second protrusion have the same height. When the first protrusion acts on the elastic housing 102 in the first groove, the second protrusion also acts on the position sensor 12 in the second groove; therefore, when the position sensor 12 detects that the second protrusion descends to a preset position in the second groove, at this time the test pad 110 also descends to a preset position in the first groove, and at the preset position the test pad 110 is in full contact with the probe array 101, and the position sensor 12 feeds back the detection result to the control unit, and the control unit generates a ready signal.

[0043] Thus, in this embodiment, the alignment result between the probe array and the test pad is detected by the position sensor, which not only improves the accuracy of the AD conversion board test, but also reduces manual operation, and improves the test efficiency and test stability of the AD conversion board.

[0044] As Figure 5 shown, it is a schematic flow chart of a detection method for an AD conversion board of a CT detector provided by an embodiment of the present invention.

[0045] A detection method for an AD conversion board of a CT detector, applied to a first device, at least includes:

[0046] S501. Control the power unit to drive the AD conversion board to move downward based on a user request, so that the AD conversion board is aligned and in contact with the probe array in the first groove structure; control the power unit to stop moving until the detection result of the position sensor is received, and generate a ready signal.

[0047] S502. In response to the ready signal and the user's selection of the excitation signal channel, control the signal excitation unit to generate an excitation signal and then collect, through the acquisition unit, the excitation data corresponding to the excitation signal generated by the chip of the AD conversion board.

[0048] S503. Perform calibration processing on the excitation data to obtain the calibrated excitation data.

[0049] S504. Retrieve the index parameters corresponding to the excitation signal from the index parameter table, and evaluate the qualification status of the AD conversion board based on the index parameters and the calibrated excitation data.

[0050] In S501, in response to receiving a target operation triggered by a target object, output a control signal to the power unit. The power unit starts to act, aligning the probe array in contact with the test pad. At the same time, upon receiving the detection result of the position sensor, output a ready signal. The power unit starting to act indicates that the moving mechanism of the power unit starts to move, moving the first protrusion to a preset position in the first groove, and the probe array is in full contact with the test pad of the AD conversion board. At this time, the second protrusion also presses on the position sensor, and the position sensor detects the ready signal that the second protrusion has reached the preset position. This signal is sent back to the control circuit as the signal indicating that the detection device is ready.

[0051] In S502, in response to the ready signal and the target object's selection of the excitation signal channel, the control circuit board outputs a control signal to the signal excitation unit. The signal excitation unit generates an excitation signal corresponding to the excitation signal channel, and the excitation signal is led to the AD conversion board through the probe array; the chip of the AD conversion board processes the excitation signal to generate a digital signal; the readout circuit of the acquisition unit collects, through the signal interface of the AD conversion board, the excitation data corresponding to the excitation signal. The excitation signal is used to provide excitation for functional evaluation of the AD conversion board.

[0052] In S503, the excitation signal at least includes a gain excitation signal, a noise excitation signal, and a linear excitation signal; the excitation data includes a gain data matrix corresponding to the gain excitation signal, a noise data matrix corresponding to the noise excitation signal, and a linear data matrix corresponding to the linear excitation signal. Among them, the linear excitation signal is about 10 times different from the gain excitation signal.

[0053] For all gain data matrices A0(x, y, t), calculate the response mean vector in the time T direction Obtain the corrected gain matrix A1(x, y);

[0054] For all noise data matrices S0(x, y, t), calculate the response standard deviation vector S1 = stdev(S0(x, y, t)) in the time T direction to obtain the corrected noise matrix S1(x, y);

[0055] Calculate the mean vector for all linear data matrices N0(x, y, t) in the time T direction Obtain the mean vector N1(x, y); Based on the corrected gain matrix A1(x, y) and the mean vector N1(x, y) of the same signal channel, obtain the corrected linear matrix N2(x, y);

[0056] Among them, the gain data matrix A0(x, y, t), the noise data matrix S0(x, y, t), and the linear data matrix N0(x, y, t) are all used to indicate the data of a×b pixel channels on the AD conversion board. Each group of data corresponds to each moment t, with a total of T moments. x represents the x-th channel in the X direction of the AD conversion board, a is the total number of channels in the X direction of the AD conversion board, y represents the y-th channel in the Y direction of the AD conversion board, and b is the total number of channels in the Y direction of the AD conversion board.

[0057] In S504, the index parameter table is used to indicate the evaluation indexes of the AD conversion board with qualified quality under different target excitation signals.

[0058] There is no limitation on the evaluation method of the AD conversion board, and it can be evaluated based on a model or a preset rule.

[0059] For example: Retrieve the gain parameter matrix corresponding to the gain excitation signal, the noise parameter matrix corresponding to the noise excitation signal, and the linear parameter matrix corresponding to the linear excitation signal from the index parameter table; Based on the corrected gain matrix and the gain parameter matrix, determine that the gain excitation signal meets the preset requirements; Based on the corrected noise matrix and the noise parameter matrix, determine that the noise excitation signal meets the preset requirements; Based on the corrected linear matrix and the linear parameter matrix, determine that the linear excitation signal meets the preset requirements; If the gain excitation signal, the noise excitation signal, and the linear excitation signal all meet the preset requirements, then determine that the AD conversion board is qualified; If one of the gain excitation signal, the noise excitation signal, and the linear excitation signal does not meet the preset requirements, then determine that the AD conversion board is unqualified.

[0060] For any gain data in the corrected gain matrix: Obtain the position information of the gain data in the corrected gain matrix, query the corresponding gain parameter range from the gain parameter matrix, and determine whether the gain data is within the gain parameter range; if so, determine that the gain data meets the preset requirements; if each gain data in the corrected gain matrix meets the preset requirements, determine that the corrected gain matrix meets the preset requirements; if there is one gain data in the corrected gain matrix that does not meet the preset requirements, determine that the corrected gain matrix does not meet the preset requirements.

[0061] For any noise data in the corrected noise matrix: Obtain the position information of the noise data in the corrected noise matrix, query the corresponding noise parameter range from the noise parameter matrix, and determine whether the noise data is within the noise parameter range; if so, determine that the noise data meets the preset requirements; if each noise data in the corrected noise matrix meets the preset requirements, determine that the corrected noise matrix meets the preset requirements; if there is one noise data in the corrected noise matrix that does not meet the preset requirements, determine that the corrected noise matrix does not meet the preset requirements.

[0062] For any linear data in the corrected linear matrix: Obtain the position information of the linear data in the corrected linear matrix, query the corresponding linear parameter range from the linear parameter matrix, and determine whether the linear data is within the linear parameter range; if so, determine that the linear data meets the preset requirements. If each linear data in the corrected linear matrix meets the preset requirements, determine that the corrected linear matrix meets the preset requirements; if there is one linear data in the corrected linear matrix that does not meet the preset requirements, determine that the corrected linear matrix does not meet the preset requirements.

[0063] The present invention effectively solves the problems of large error and low efficiency in manual contact by using an automated probe alignment and contact device; the present invention can also perform automated signal excitation and result interpretation on the AD conversion board, effectively improving the test efficiency and test stability of the AD conversion board.

[0064] It should be understood that in various embodiments of the present invention, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0065] As Figure 6 shown, it is a schematic structural diagram of a detection system for an AD conversion board of a CT detector provided by an embodiment of the present invention.

[0066] A detection system for an AD conversion board of a CT detector; applied to a first device, including: a first generation module 601, configured to control the power unit to drive the AD conversion board to move downward based on a user request, so that the AD conversion board is aligned and contacted with a probe array in the first groove structure; and control the power unit to stop moving until the detection result of the position sensor is received, and generate a ready signal; a second generation module 602, configured to, in response to the ready signal and the user's selection of an excitation signal channel, control the signal excitation unit to generate an excitation signal and then collect excitation data corresponding to the excitation signal generated by the chip of the AD conversion board through the acquisition unit; a calibration processing module 603, configured to perform calibration processing on the excitation data to obtain calibrated excitation data; and an evaluation module 604, configured to retrieve index parameters corresponding to the excitation signal from an index parameter table, and evaluate the qualification status of the AD conversion board based on the index parameters and the calibrated excitation data.

[0067] In a preferred implementation manner of this embodiment, the calibration processing module includes: a first calibration unit, configured to calculate a response mean vector in the time T direction for all gain data matrices A0(x, y, t), to obtain a calibrated gain matrix A1(x, y); a second calibration unit, configured to calculate a response standard deviation vector S1 = stdev(S0(x, y, t)) in the time T direction for all noise data matrices S0(x, y, t), to obtain a calibrated noise matrix S1(x, y); a third calibration unit, configured to calculate a mean vector in the time T direction for all linear data matrices N0(x, y, t) to obtain a mean vector N1(x, y); and based on the calibrated gain matrix A1(x, y) and the mean vector N1(x, y) of the same signal channel, obtain a calibrated linear matrix N2(x, y);

[0068] Wherein, the gain data matrix A0(x, y, t), the noise data matrix S0(x, y, t), and the linear data matrix N0(x, y, t) are all used to indicate data of a×b pixel channels on the AD conversion board. Each group of data corresponds to each moment t, and there are a total of T moments. x represents the xth channel of the AD conversion board in the X direction, a is the total number of channels of the AD conversion board in the X direction, y represents the yth channel of the AD conversion board in the Y direction, and b is the total number of channels of the AD conversion board in the Y direction.

[0069] In a preferred implementation manner of this embodiment, the evaluation module includes: a retrieval unit, configured to retrieve a gain parameter matrix corresponding to the gain excitation signal, a noise parameter matrix corresponding to the noise excitation signal, and a linear parameter matrix corresponding to the linear excitation signal from the index parameter table; a first determination unit, configured to determine that the gain excitation signal meets a preset requirement based on the corrected gain matrix and the gain parameter matrix; a second determination unit, configured to determine that the noise excitation signal meets a preset requirement based on the corrected noise matrix and the noise parameter matrix; a third determination unit, configured to determine that the linear excitation signal meets a preset requirement based on the corrected linear matrix and the linear parameter matrix; a fourth determination unit, configured to determine that the AD conversion board is qualified if the gain excitation signal, the noise excitation signal, and the linear excitation signal all meet the preset requirements.

[0070] In a preferred implementation manner of this embodiment, the first determination unit includes: a first determination subunit configured to, for any gain data in the corrected gain matrix: obtain the position information of the gain data in the corrected gain matrix, query the gain parameter range corresponding to the position information from the gain parameter matrix, and determine whether the gain data is within the gain parameter range; if so, determine that the gain data meets the preset requirement; a second determination subunit, configured to determine that the corrected gain matrix meets the preset requirement if each gain data in the corrected gain matrix meets the preset requirement; a third determination subunit, configured to determine that the corrected gain matrix does not meet the preset requirement if there is one gain data in the corrected gain matrix that does not meet the preset requirement.

[0071] The above device can execute the detection method for the AD conversion board of a CT detector provided in an embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the detection method for the AD conversion board of a CT detector. For technical details not described in detail in this embodiment, reference can be made to the detection method for the AD conversion board of a CT detector provided in an embodiment of the present invention.

[0072] The present invention also provides an electronic device, including: a processor; a memory for storing executable instructions of the processor; the processor is configured to read the executable instructions from the memory and execute the instructions to implement the detection method for the AD conversion board of a CT detector according to the present invention.

[0073] In addition to the above methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, and when the computer program instructions are run by a processor, the processor is caused to execute the steps in the methods according to various embodiments of the present application described in the "Exemplary Method" section above of this specification.

[0074] The computer program product may be written in any combination of one or more programming languages for programming code to perform the operations of the embodiments of the present application. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The programming code may be executed entirely on the user computing device, partially on the user device, executed as a stand-alone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0075] In addition, an embodiment of the present application may also be a computer-readable storage medium having computer program instructions stored thereon, and when the computer program instructions are run by a processor, the processor is caused to execute the steps in the methods of the following embodiments according to the present application described in the "Exemplary Method" section of the present specification.

[0076] The computer-readable storage medium may employ any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may, for example, include but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0077] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for illustrative and easy-to-understand purposes, and not for limitation. The above details do not limit the present application to necessarily adopt the above specific details for implementation.

[0078] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "comprising," "including," "having," etc. are open-ended terms meaning "including but not limited to" and can be used interchangeably with each other. The word "or" and "and" used herein refer to the phrase "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The phrase "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with it.

[0079] It should also be noted that in the devices, equipment, and methods of this application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of this application.

[0080] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0081] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0082] In the description of this specification, the descriptions referring to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0084] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A detection device for a CT detector AD conversion board, characterized in that: include: The detection part comprises: a probe array unit and a position sensor; the probe array unit comprises an elastic shell and a probe array; a first groove structure is formed above the elastic shell, and the probe array is located in the first groove structure; the top of the first groove structure is used to embed the test pad of the AD conversion board arranged opposite to the probe array; the position sensor is used to detect the descending position of the AD conversion board, and feed back the detection result to the electrical part when it is determined that the AD conversion board descends to a preset position; A power unit, used for providing power to the elastic housing so that the elastic housing drives the test pad of the AD conversion board to move toward the probe array; The electrical part is respectively connected to the detection part and the power part in communication; the electrical part is used to control the power part to provide power to the elastic shell so that the test pad is aligned and contacted with the probe array, and the power part is controlled to stop providing power and generate a ready signal when the detection result of the position sensor is received; the electrical part is also used to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and collect excitation data corresponding to the excitation signal from the signal interface of the AD conversion board; call the index parameters corresponding to the excitation signal from the index parameter table; and evaluate the qualification of the AD conversion board based on the index parameters and the corrected excitation data; The detection unit also includes a positioning base; The positioning base is provided with a second groove structure; the second groove structure includes a first groove and a second groove; the probe array unit is installed in the first groove, and the position sensor is installed in the second groove; The power unit includes a motion mechanism and a pressure block; the lower end of the motion mechanism is connected to the pressure block, and the lower end of the pressure block is provided with a first protrusion and a second protrusion; the first protrusion cooperates with the first groove; the second protrusion cooperates with the second groove; the motion mechanism is used to drive the pressure block to reciprocate in a direction perpendicular to the second groove structure; the position sensor is used to detect the position of the test pad in the first groove; The control unit of the electrical part is used to control the motion mechanism to drive the pressure block to move downward based on a user request so that the test pad in the elastic shell is aligned and contacted with the probe array; and the motion mechanism is controlled to stop moving and a ready signal is generated until the position sensor detects that the test pad has reached the preset position of the first groove.

2. The device according to claim 1, characterized in that The electrical part includes a collection unit, a signal excitation unit and a control unit; the control unit is respectively connected to the signal excitation unit, the collection unit and the detection part for communication; The signal excitation unit is connected to the probe array for communication; it is used to generate an excitation signal and guide the excitation signal to the chip of the AD conversion board through the probe array; The acquisition unit is used to acquire the excitation data corresponding to the excitation signal generated by the chip of the AD conversion board through the signal interface of the AD conversion board; The control unit is used to control the power unit to drive the AD conversion board to move downward so that the test pad is aligned and contacted with the probe array in the first groove structure; the power unit is controlled to stop moving and generate a ready signal until the detection result of the position sensor is received; the control unit is also used to control the signal excitation unit to generate an excitation signal based on the ready signal and the user's selection of the excitation signal channel; and control the acquisition unit to acquire excitation data corresponding to the excitation signal through the signal interface of the AD conversion board.

3. The device according to claim 1, characterized in that The elastic shell is a closed shell formed by a first groove structure with an opening facing upward; the probe array is located in the first groove structure in the elastic shell, and a plurality of through holes are provided on the elastic shell at the bottom of the first groove structure, and the probe array in the elastic shell passes through the through holes to align and contact with the test pad.

4. A detection method for a CT detector AD conversion board, characterized in that: A detection device for a CT detector AD conversion board as claimed in any one of claims 1 to 3, comprising: Based on a user request, the power unit is controlled to drive the AD conversion board to move downward, so that the AD conversion board is aligned with the probe array in the first groove structure and contacts; the power unit is controlled to stop moving and generate a ready signal until a detection result of the position sensor is received; In response to the ready signal and the user's selection of the excitation signal channel, the control signal excitation unit generates an excitation signal and then collects excitation data corresponding to the excitation signal generated by the chip of the AD conversion board through the collection unit; Performing correction processing on the excitation data to obtain corrected excitation data; Retrieving the index parameter corresponding to the excitation signal from the index parameter table, and evaluating the qualification of the AD conversion board based on the index parameter and the corrected excitation data; The excitation signal at least includes a gain excitation signal, a noise excitation signal, and a linear excitation signal; the excitation data includes a gain data matrix corresponding to the gain excitation signal, a noise data matrix corresponding to the noise excitation signal, and a linear data matrix corresponding to the linear excitation signal.

5. The method according to claim 4, characterized in that The correction processing of the excitation data to obtain the corrected excitation data comprises: For all gain data matrices A0(x, y, t), calculate the response mean vector in the time T direction , get the corrected gain matrix A1(x, y); For all noise data matrices S0(x, y, t), calculate the response standard deviation vector in the time T direction , and obtain the corrected noise matrix S1(x, y); Calculate the mean vector in the time T direction for all linear data matrices N0(x, y, t) , obtain the mean vector N1(x, y); based on the corrected gain matrix A1(x, y) of the same signal channel and the mean vector N1(x, y), obtain the corrected linear matrix N2(x, y); Among them, the gain data matrix A0(x, y, t), the noise data matrix S0(x, y, t), and the linear data matrix N0(x, y, t) are all used to indicate the data of a×b pixel channels on the AD conversion board, each group of data corresponds to each moment t, a total of T moments, x represents the xth channel of the AD conversion board in the X direction, a is the total number of channels of the AD conversion board in the X direction, y represents the yth channel of the AD conversion board in the Y direction, and b is the total number of channels of the AD conversion board in the Y direction.

6. The method according to claim 5, characterized in that The step of retrieving the index parameter corresponding to the excitation signal from the index parameter table and evaluating the qualification of the AD conversion board based on the index parameter and the corrected excitation data comprises: Retrieving from the index parameter table a gain parameter matrix corresponding to the gain excitation signal, a noise parameter matrix corresponding to the noise excitation signal, and a linear parameter matrix corresponding to the linear excitation signal; Based on the corrected gain matrix and the gain parameter matrix, determining whether the gain excitation signal meets a preset requirement; Based on the corrected noise matrix and the noise parameter matrix, determining whether the noise excitation signal meets preset requirements; Based on the corrected linear matrix and the linear parameter matrix, determining whether the linear excitation signal meets a preset requirement; If the gain excitation signal, the noise excitation signal and the linear excitation signal all meet preset requirements, it is determined that the AD conversion board is qualified.

7. The method according to claim 6, characterized in that The step of determining whether the gain excitation signal meets preset requirements based on the corrected gain matrix and the gain parameter matrix comprises: For any gain data in the corrected gain matrix: obtaining position information of the gain data in the corrected gain matrix, querying a gain parameter range corresponding to the position information from the gain parameter matrix, and determining whether the gain data is within the gain parameter range; if so, determining that the gain data meets the preset requirements; If each of the gain data in the corrected gain matrix meets the preset requirement, determining that the gain excitation signal meets the preset requirement; If one of the gain data in the corrected gain matrix does not meet the preset requirement, it is determined that the gain excitation signal does not meet the preset requirement.

8. A detection system for a CT detector AD conversion board, characterized in that: A detection device for a CT detector AD conversion board as claimed in any one of claims 1 to 3, comprising: A first generating module is used to control the power unit to drive the AD conversion board to move downward based on a user request, so that the AD conversion board is aligned and contacted with the probe array in the first groove structure; and the power unit is controlled to stop moving and generate a ready signal until a detection result of the position sensor is received; A second generating module is used for, in response to the ready signal and the user's selection of the excitation signal channel, controlling the signal excitation unit to generate the excitation signal and then collecting the excitation data corresponding to the excitation signal generated by the chip of the AD conversion board through the collecting unit; A correction processing module, used for performing correction processing on the excitation data to obtain corrected excitation data; An evaluation module, used for retrieving the index parameter corresponding to the excitation signal from the index parameter table, and evaluating the qualification of the AD conversion board based on the index parameter and the corrected excitation data; The excitation signal at least includes a gain excitation signal, a noise excitation signal, and a linear excitation signal; the excitation data includes a gain data matrix corresponding to the gain excitation signal, a noise data matrix corresponding to the noise excitation signal, and a linear data matrix corresponding to the linear excitation signal.

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