CN116418392A - Device and method for testing bit error rate of CT slip ring data transceiver module - Google Patents
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- CN116418392A CN116418392A CN202111647840.3A CN202111647840A CN116418392A CN 116418392 A CN116418392 A CN 116418392A CN 202111647840 A CN202111647840 A CN 202111647840A CN 116418392 A CN116418392 A CN 116418392A
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Abstract
The invention discloses a bit error rate testing device and method for a CT slip ring data transceiver module. According to the device and the method for testing the bit error rate of the CT slip ring data transceiver module, through the fact that an input test optical signal rotates at a high speed along with the slip ring body, the whole test system completely simulates the running environment of a real CT machine, is suitable for slip ring systems with different diameter requirements, and ensures the reliability of the test.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a device and a method for testing the error rate of a CT slip ring data transceiver module.
Background
In a CT scanner, a rotating X-ray tube and an X-ray detector generate high-speed image data information, the high-speed image data information needs to be transmitted from a rotor end to a stator end, in general, the image data information generated by the X-ray detector is transmitted to a transmitting module through an optical fiber, the transmitting module outputs a differential signal to a transmitting antenna after data processing, and a receiving antenna and the receiving module at the stator end process the data and output an optical signal in a capacitive coupling non-contact manner. However, it is difficult for the actual manufacturer of the CT slip ring to purchase a complete CT machine for testing, which is costly and is not suitable for mass production. How to simulate and test the error rate of the transceiver module of the slip ring system in a real environment becomes a problem to be solved urgently.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device and a method for testing the error rate of a CT slip ring data transceiver module, which solve the problems of high testing cost and unfavorable mass production of the existing CT slip ring in the manufacturing process.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
in a first aspect, a device for testing bit error rate of a CT slip ring data transceiver module includes,
the error rate test unit is used for outputting a first electric signal in a working state and calculating the current error rate;
the emission photoelectric conversion unit is connected with the bit error rate test unit and is used for receiving the first electric signal and performing photoelectric processing to form a first optical signal output;
the optical fiber slip ring unit is connected with the emission photoelectric conversion unit and is used for receiving the first optical signal output to form second optical signal output;
the processing unit is connected with the optical fiber slip ring unit and is used for receiving the second optical signal and amplifying the second optical signal to form a third optical signal output;
the receiving photoelectric conversion unit is arranged between the processing unit and the bit error rate testing unit, is respectively connected with the processing unit and the bit error rate testing unit, and is used for receiving the third optical signal output and performing photoelectric processing to form a third electrical signal output;
the error rate is calculated by the first electric signal and the third electric signal.
Preferably, the input end of the optical fiber slip ring unit is fixedly arranged on the support, the output end of the optical fiber slip ring unit is arranged on the slip ring body ring and moves along with the slip ring body, and the output end of the optical fiber slip ring unit is connected with the input end of the processing unit.
Preferably, the processing unit comprises a processor,
the transmitting unit is connected with the optical fiber slip ring unit and is used for receiving the second optical signal and performing photoelectric processing to form second electric signal output;
and the receiving unit is connected with the transmitting unit through coupling and is used for receiving the second electric signal and performing photoelectric processing to form a third optical signal output.
Preferably, the transmitting unit includes,
the transmission module is arranged on the slip ring body and moves along with the slip ring body, and is provided with a first optical module for receiving a second optical signal and performing photoelectric processing to form a second electric signal output, wherein the second electric signal comprises a first differential electric signal and a second differential electric signal;
and the transmitting antenna is arranged on the circumference of the slip ring body and connected with the transmitting module and is used for receiving and transmitting the first differential electric signal and the second differential electric signal.
Preferably, the receiving unit includes,
the receiving antenna is arranged at the adjacent position of the transmitting antenna in a capacitive coupling mode and keeps a preset distance and is used for receiving the first differential electric signal and the second differential electric signal;
the receiving module is connected with the receiving antenna, and is provided with a second optical module for performing photoelectric processing according to the first differential electric signal and the second differential electric signal to form a third optical signal output.
More preferably, the predetermined distance is 1.6mm.
Preferably, the receiving photoelectric conversion unit is provided with a third optical module, and is configured to receive a third optical signal output and perform photoelectric processing to form a third electrical signal output, where the third electrical signal includes a third differential signal and a fourth differential signal.
In a second aspect, a method for testing bit error rate of a CT slip ring data transceiver module, using a device for testing bit error rate of a CT slip ring data transceiver module as described above, includes
Installing an optical fiber slip ring unit under the state of determining a slip ring body to be tested;
acquiring a first electric signal and a third electric signal in a state that the slip ring body runs at a high speed;
the bit error rate test unit calculates the bit error rate.
Preferably, the optical fiber slip ring unit is installed in a state of determining the slip ring body to be tested, and specifically includes that the slip ring body can be slip rings with different diameters.
The invention has the following beneficial effects:
through setting up bit error rate test unit, transmission photoelectric conversion unit, optic fibre sliding ring unit, processing unit and receiving photoelectric conversion unit, the sliding ring body is connected with optic fibre sliding ring unit, data is through transmission photoelectric conversion unit, optic fibre sliding ring unit, processing unit and receiving photoelectric conversion unit in order to form differential electrical signal output when the sliding ring high-speed is operated, bit error rate test unit direct reading bit error rate, install optic fibre sliding ring unit on the sliding ring body, the purpose that the test optical signal of having realized the input is along with the sliding ring body high-speed rotation has been simulated completely to whole test system, the running environment of true CT machine is adapted to the sliding ring system of different diameter requirements, guarantee the reliability of test, and reduce test and manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of a bit error rate testing device of a CT slip ring data transceiver module of the present invention;
FIG. 2 is a schematic diagram of the connection between a slip ring body and an optical fiber slip ring unit according to the present invention;
fig. 3 is a flow chart of a method for testing the error rate of the CT slip ring data transceiver module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: the bit error rate testing device of the CT slip ring data transceiver module comprises a bit error rate testing unit 101 which is used for outputting a first electric signal in a working state and calculating the current bit error rate; the bit error rate test unit can be a bit error meter 1, the bit error meter 1 can support a plurality of PRBS code types with the rates of 1.25Gbps, 2.5Gbps,5Gbps, 6.25Gbps and the like, the output amplitude is 10-600mV and is adjustable, a differential CML signal is output and input uniformly, and the bit error meter 1 can display the byte number of the bit error and the average bit error rate in real time. The transmitting photoelectric conversion unit 102 is connected with the bit error rate test unit 101 and is used for receiving the first electric signal and performing photoelectric processing to form a first optical signal output; the first electric signal is a differential signal and is transmitted to the transmitting photoelectric conversion module through the coaxial cable, and the transmitting photoelectric conversion module is internally provided with an optical module which can convert the first electric signal into a first optical signal and output the first optical signal. An optical fiber slip ring unit 103 connected with the emission photoelectric conversion unit 102 for receiving the first optical signal output to form a second optical signal output; a processing unit 104 connected to the optical fiber slip ring unit 103, for receiving the second optical signal and performing amplification processing to form a third optical signal output; the receiving photoelectric conversion unit 105 is arranged between the processing unit 104 and the bit error rate testing unit 101, and is respectively connected with the processing unit 104 and the bit error rate testing unit 101, and is used for receiving a third optical signal output and performing photoelectric processing to form a third electrical signal output; the error rate is calculated by the first electric signal and the third electric signal.
By arranging the error rate test unit 101, the transmitting photoelectric conversion unit 102, the optical fiber slip ring unit 103, the processing unit 104 and the receiving photoelectric conversion unit 105, the slip ring body is connected with the optical fiber slip ring unit 103, and when the slip ring runs at a high speed, data passes through the transmitting photoelectric conversion unit 102, the optical fiber slip ring unit 103, the processing unit 104 and the receiving photoelectric conversion unit 105 to form differential electric signal output, the error rate test unit 101 directly calculates the error rate, and the error rate test device is suitable for measuring and calculating the error rate of slip ring systems with different diameter requirements. The optical fiber slip ring unit 103 is arranged on the slip ring body, so that the aim of high-speed rotation of an input test optical signal along with the slip ring body is fulfilled, the whole test system completely simulates the running environment of a real CT machine, is suitable for slip ring systems with different diameter requirements, and ensures the reliability of the test.
In a preferred embodiment, the processing unit 104 includes a transmitting unit 202 connected to the optical fiber slip ring unit 103, for receiving the second optical signal and performing photoelectric processing to form a second electrical signal output; the receiving unit 201 is coupled to the transmitting unit 202, and is configured to receive the second electrical signal and perform photoelectric processing to form a third optical signal output.
In a preferred embodiment, fig. 2 is a schematic connection diagram of the slip ring body and the optical fiber slip ring unit, in which, when a test is performed, an input end of the optical fiber slip ring unit 103 is fixedly mounted on a bracket, an output end of the optical fiber slip ring unit 103 is mounted on a ring of the slip ring body 9 and rotates along with the slip ring body 9, and an output end of the optical fiber slip ring unit 103 is connected with an input end of the processing unit 104; for example, the central position of the slip ring body is an optical fiber slip ring unit, one end of the optical fiber slip ring unit 103 is fixed, the other end rotates along with the slip ring body 9, the fixed end of the optical fiber slip ring unit 103 receives a first optical signal from the emission photoelectric conversion module 102 (not shown), a second optical signal output by the rotating end of the optical fiber slip ring unit 103 when the test is performed is sent to the emission module (not shown), wherein the emission module (not shown) also rotates along with the slip ring body 9, a second electric signal output by the emission module (not shown) is sent to the emission antenna (not shown), and the emission antenna (not shown) is located in an outer diameter groove of the slip ring body.
The transmitting unit 202 includes a transmitting module 4, where the transmitting module is provided with a first optical module, and is configured to receive a second optical signal and perform photoelectric processing to form a second electrical signal output, where the second electrical signal includes a first differential electrical signal and a second differential electrical signal; and the transmitting antenna 5 is arranged on the periphery of the slip ring body and connected with the transmitting module 4 and is used for receiving and transmitting the first differential electric signal and the second differential electric signal.
The first optical signal forms a second optical signal through the optical fiber slip ring unit, the second optical signal is transmitted to the transmitting module 4, the first optical module is arranged in the transmitting module, the first optical module converts the optical signal into an electric signal, the electric signal is subjected to shaping and amplification by the clock data recovery circuit, the output code pattern and the output rate are unchanged, the differential signal is divided into two paths by the differential driving amplification circuit and is output to the transmitting antenna, the differential signal is a second electric signal, and the second electric signal comprises a first differential signal and a second differential signal. The transmitting antenna is arranged on the circumference of the insulating slip ring body in a circle.
The receiving unit 201 includes a receiving antenna 6, where the receiving antenna 6 is disposed at a position adjacent to the transmitting antenna 5 in a capacitive coupling manner and keeps a predetermined distance, and is configured to receive a first differential electrical signal and a second differential electrical signal; the receiving module 7 is connected with the receiving antenna 6, and is provided with a second optical module for performing photoelectric processing according to the first differential electrical signal and the second differential electrical signal to form a third optical signal output, the predetermined distance is 1.6mm, and the receiving photoelectric conversion unit 105 is provided with a third optical module for receiving the third optical signal output and performing photoelectric processing to form a third electrical signal output, where the third electrical signal includes a third differential signal and a fourth differential signal.
The receiving antenna 6 is horizontally fixed at a position which is only 1.6mm away from the transmitting antenna, the receiving antenna 6 receives weak second electric signals in a capacitive coupling mode, the weak second electric signals are transmitted to a second optical module arranged in the receiving module 7 after being subjected to data processing such as balanced amplification and data shaping of the receiving module 7, the second optical module outputs third optical signals, the third optical signals are sent to an optical port of the receiving photoelectric conversion unit 105 in an optical fiber connection mode, the third optical signals are converted into third electric signals by the third optical module arranged in the receiving photoelectric conversion module 8 and are output, the third electric signals are differential signals of a pair of CMLs and comprise third differential signals and fourth differential signals, the differential signals are connected to an input port of the error code instrument, and the error code instrument can obtain error code rate by comparing the output binary data with the input binary data.
The invention also provides a bit error rate test method of the CT slip ring data transceiver module, the flow chart of which is shown in figure 3, the bit error rate test device adopting the CT slip ring data transceiver module comprises
S110, installing an optical fiber slip ring unit under the state of determining a slip ring body to be tested;
specifically, under the condition that the model of the slip ring body is determined, an optical fiber slip ring unit is arranged on the slip ring body, the aim that an input test optical signal rotates along with the slip ring body at a high speed is achieved, the whole test system completely simulates the running environment of a real CT machine, is suitable for slip ring systems with different diameter requirements, and ensures the reliability of the test.
S120, acquiring a first electric signal and a third electric signal in a state that the slip ring body runs at a high speed;
specifically, the slip ring body rotates at a high speed, and the first electrical signal (differential signal) is output according to the error code meter test unit and transmitted to the transmitting photoelectric conversion module, the optical fiber slip ring unit, the transmitting module, the transmitting antenna, the receiving module and the receiving photoelectric conversion module through the coaxial cable, so that an input third electrical signal (differential signal) is formed.
S130, the error rate test unit calculates the error rate.
Specifically, the error code meter compares the output binary data with the input binary data, and the error code rate can be obtained according to calculation.
In a preferred embodiment, the optical fiber slip ring unit is installed in a state of determining a slip ring body to be tested, and specifically includes that the slip ring body can be slip rings with different diameters.
Under the condition that the slip ring body rotates at a high speed, the error rate test of the data receiving and transmitting module is realized by the mode of optical fiber slip ring connection, the test environment of real CT operation is completely simulated, and the method is simple and efficient.
When the error rate is calculated by adopting the error rate testing device of the CT slip ring data transceiver module, the error rate tester 1 outputs a first electric signal, the first electric signal comprises two paths of differential electric signals, the first electric signal is input to the transmitting photoelectric conversion module 2 to form a first optical signal, the first optical signal is output through the optical fiber slip ring unit 3 to form a second optical signal, the second optical signal is input to the transmitting module 4 and the transmitting antenna 5 of the slip ring system to form a second electric signal output, the second electric signal comprises the first differential signal and the second differential signal, the receiving antenna 6 and the receiving module 7 receive the second electric signal, the second electric signal outputs a third optical signal through shaping processing, the third electric signal forms a third electric signal output through the receiving photoelectric conversion module 8, the third electric signal comprises a third differential signal and a fourth differential signal, and the receiving photoelectric conversion module 8 outputs the differential electric signal to the error tester 1, so that the error rate tester can compare the transmitted binary data with the received binary data, thereby calculating the error rate. The whole test system completely simulates the running environment of a real CT machine, and is suitable for slip ring systems with different diameter requirements, thereby ensuring the reliability of the test.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A bit error rate testing device of a CT slip ring data transceiver module is characterized by comprising,
the error rate test unit is used for outputting a first electric signal in a working state and calculating the current error rate;
the emission photoelectric conversion unit is connected with the bit error rate test unit and is used for receiving the first electric signal and performing photoelectric processing to form a first optical signal output;
the optical fiber slip ring unit is connected with the emission photoelectric conversion unit and is used for receiving the first optical signal output to form second optical signal output;
the processing unit is connected with the optical fiber slip ring unit and is used for receiving the second optical signal and amplifying the second optical signal to form a third optical signal output;
the receiving photoelectric conversion unit is arranged between the processing unit and the bit error rate testing unit, is respectively connected with the processing unit and the bit error rate testing unit, and is used for receiving the third optical signal output and performing photoelectric processing to form a third electrical signal output;
the error rate is calculated by the first electric signal and the third electric signal.
2. The device for testing the error rate of the CT slip ring data transceiver module according to claim 1, wherein the input end of the optical fiber slip ring unit is fixedly mounted on the support, the output end of the optical fiber slip ring unit is mounted on the slip ring body ring and moves along with the slip ring body, and the output end of the optical fiber slip ring unit is connected with the input end of the processing unit.
3. The device for testing bit error rate of a CT slip ring data transceiver module of claim 1, wherein said processing unit comprises,
the transmitting unit is connected with the optical fiber slip ring unit and is used for receiving the second optical signal and performing photoelectric processing to form second electric signal output;
and the receiving unit is connected with the transmitting unit through coupling and is used for receiving the second electric signal and performing photoelectric processing to form a third optical signal output.
4. The device for testing the bit error rate of the CT slip ring data transceiver module of claim 3, wherein said transmitting unit comprises,
the transmission module is arranged on the slip ring body and moves along with the slip ring body, and is provided with a first optical module for receiving a second optical signal and performing photoelectric processing to form a second electric signal output, wherein the second electric signal comprises a first differential electric signal and a second differential electric signal;
and the transmitting antenna is arranged on the circumference of the slip ring body and connected with the transmitting module and is used for receiving and transmitting the first differential electric signal and the second differential electric signal.
5. The device for testing bit error rate of CT slip ring data transceiver module of claim 3 wherein said receiving unit comprises,
the receiving antenna is arranged at the adjacent position of the transmitting antenna in a capacitive coupling mode and keeps a preset distance and is used for receiving the first differential electric signal and the second differential electric signal;
the receiving module is connected with the receiving antenna, and is provided with a second optical module for performing photoelectric processing according to the first differential electric signal and the second differential electric signal to form a third optical signal output.
6. The device for testing the bit error rate of a CT slip ring data transceiver module as recited in claim 5, wherein said predetermined distance is 1.6mm.
7. The device for testing the error rate of the CT slip ring data transceiver module according to claim 1, wherein the receiving photoelectric conversion unit is configured with a third optical module, and is configured to receive a third optical signal output and perform photoelectric processing to form a third electrical signal output, and the third electrical signal includes a third differential signal and a fourth differential signal.
8. A method for testing the bit error rate of a CT slip ring data transceiver module, characterized in that the bit error rate testing device of the CT slip ring data transceiver module according to any one of the claims 1 to 7 is adopted, comprising
Installing an optical fiber slip ring unit under the state of determining a slip ring body to be tested;
acquiring a first electric signal and a third electric signal in a state that the slip ring body runs at a high speed;
the bit error rate test unit calculates the bit error rate.
9. The method for testing the bit error rate of the CT slip ring data transceiver module according to claim 8, wherein the optical fiber slip ring unit is installed in a state of determining the slip ring body to be tested, and specifically comprises that the slip ring body can be slip rings with different diameters.
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