CN216391013U - Error rate testing device for CT slip ring data transceiver module - Google Patents
Error rate testing device for CT slip ring data transceiver module Download PDFInfo
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- CN216391013U CN216391013U CN202123394890.3U CN202123394890U CN216391013U CN 216391013 U CN216391013 U CN 216391013U CN 202123394890 U CN202123394890 U CN 202123394890U CN 216391013 U CN216391013 U CN 216391013U
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Abstract
The utility model discloses a bit error rate testing device of a CT slip ring data transceiver module, which comprises a bit error rate testing unit, a transmitting photoelectric conversion unit, an optical fiber slip ring unit, a processing unit and a receiving photoelectric conversion unit, wherein a first electric signal is transmitted and a third electric signal is received through the bit error rate testing unit, and the bit error rate is calculated through the first electric signal and the third electric signal. According to the error rate testing device for the CT slip ring data transceiver module, the input testing optical signal rotates at a high speed along with the slip ring body, the whole testing system completely simulates the running environment of a real CT machine, the testing device is suitable for slip ring systems with different diameter requirements, and the testing reliability is guaranteed.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a bit error rate testing device for 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, which needs to be transmitted from a rotor end to a stator end, and in general, the image data information generated by the X-ray detector is transmitted to an emission module through an optical fiber, the emission module processes data and outputs a differential signal to an emission antenna, and a receiving antenna and a receiving module at the stator end process data and output an optical signal in a capacitive coupling non-contact manner. However, it is difficult for an actual CT slip ring manufacturer to purchase a complete CT machine for testing, which is very costly and not conducive to mass production. How to simulate and test the error rate of the slip ring system transceiver module in a real environment becomes a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a device and a method for testing the error rate of a CT slip ring data transceiver module, and solves the problems that the existing CT slip ring is high in testing cost and not beneficial to batch production in the manufacturing process.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
a bit error rate testing device of a CT slip ring data transceiver module comprises,
the bit error rate testing unit is used for outputting a first electric signal in a working state and calculating the current bit error rate;
the transmitting photoelectric conversion unit is connected with the bit error rate testing unit and used for receiving the first electric signal and performing photoelectric processing to form first optical signal output;
the optical fiber slip ring unit is connected with the transmitting photoelectric conversion unit and used for receiving the first optical signal output to form a second optical signal output;
the processing unit is connected with the optical fiber slip ring unit and used for receiving the second optical signal and carrying out amplification processing to form third optical signal output;
the receiving photoelectric conversion unit is arranged between the processing unit and the error rate testing unit, is respectively connected with the processing unit and the 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 bit error rate is calculated through the first electric signal and the third electric signal.
Preferably, the input end of the optical fiber slip ring unit is fixedly mounted on the bracket, the output end of the optical fiber slip ring unit is mounted on the ring of the slip ring body 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 used for receiving the second optical signal and performing photoelectric processing to form a second electric signal to be output;
and the receiving unit is coupled with the transmitting unit and used for receiving the second electric signal and performing photoelectric processing to form a third optical signal output.
Preferably, the transmitting unit includes a transmitter for transmitting the data,
the transmitting module is arranged on the slip ring body and moves along with the slip ring body, the transmitting module is provided with a first optical module and is used for receiving a second optical signal and performing photoelectric processing to form a second electric signal to be output, and the second electric signal comprises a first differential electric signal and a second differential electric signal;
and the transmitting antenna is arranged on the periphery of the slip ring body, connected with the transmitting module and used for receiving and transmitting the first differential electric signal and the second differential electric signal.
Preferably, the receiving unit includes a receiver for receiving the data,
the receiving antenna is arranged at the position adjacent to the transmitting antenna in a capacitive coupling mode, keeps a preset distance and is used for receiving the first differential electric signal and the second differential electric signal;
and 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 third optical signal output.
More preferably, the predetermined distance is 1.6 mm.
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 error rate of a CT slip ring data transceiver module adopts the above-mentioned CT slip ring data transceiver module error rate testing device, which comprises
The utility model has the following beneficial effects:
by arranging the error rate testing unit, the transmitting photoelectric conversion unit, the optical fiber slip ring unit, the processing unit and the receiving photoelectric conversion unit, the slip ring body is connected with the optical fiber slip ring unit, when the slip ring runs at a high speed, data passes through the transmitting photoelectric conversion unit, the optical fiber slip ring unit, the processing unit and the receiving photoelectric conversion unit to form differential electrical signal output, the error rate testing unit directly reads the error rate, the optical fiber slip ring unit is arranged on the slip ring body, the purpose that the input testing optical signal rotates along with the slip ring body at a high speed is achieved, the whole testing system completely simulates the running environment of a real CT machine, the testing system is suitable for slip ring systems with different diameter requirements, the reliability of testing is guaranteed, and the testing and manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a bit error rate testing device of a CT slip ring data transceiver module according to the present invention;
FIG. 2 is a schematic view of the connection between the slip ring body and the optical fiber slip ring unit according to the present invention;
FIG. 3 is a flow chart of the method for testing the error rate of the CT slip ring data transceiver module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the CT slip ring data transceiver module error rate testing device comprises an error rate testing unit 101, a calculating unit and a calculating unit, wherein the error rate testing unit is used for outputting a first electric signal in a working state and calculating the current error rate; the error rate testing unit can be an error code meter 1, the error code meter 1 can support various PRBS (pseudo random binary system) code types with the speed of 1.25Gbps, 2.5Gbps, 5Gbps, 6.25Gbps and the like, the output amplitude is adjustable from 10 mV to 600mV, differential CML (constant differential amplitude modulation) signals are output and input, and the error code meter 1 can display the byte number of error codes and the average error rate in real time. The transmitting photoelectric conversion unit 102 is connected with the bit error rate testing unit 101 and 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 a coaxial cable, and an optical module is arranged in the transmitting photoelectric conversion module and can convert the first electric signal into a first optical signal to be output. The optical fiber slip ring unit 103 is connected with the transmitting photoelectric conversion unit 102 and used for receiving the first optical signal output to form a second optical signal output; the processing unit 104 is connected with the optical fiber slip ring unit 103 and is used 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, is respectively connected with the processing unit 104 and the bit error rate testing unit 101, and is used for receiving the third optical signal output and performing photoelectric processing to form a third electrical signal output; the bit error rate is calculated through the first electric signal and the third electric signal.
By arranging the bit 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, 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 electrical signal output, and the bit error rate test unit 101 directly calculates the bit error rate and is suitable for measuring and calculating the bit error rate of a slip ring system with different diameter requirements. The optical fiber slip ring unit 103 is arranged on the slip ring body, the purpose that an input test optical signal rotates at a high speed along with the slip ring body is achieved, the whole test system completely simulates the operation environment of a real CT machine, the test system is suitable for slip ring systems with different diameter requirements, and the test reliability is guaranteed.
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 an optoelectronic processing to form a second electrical signal output; and the receiving unit 201 is coupled with the transmitting unit 202 and is used for receiving the second electrical signal and performing photoelectric processing to form a third optical signal output.
In a preferred embodiment, fig. 2 is a schematic connection diagram of a slip ring body and an optical fiber slip ring unit, 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 circular ring of the slip ring body 9 and rotates 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 a processing unit 104; for example, the slip ring body is centrally located in an optical fiber slip ring unit, one end of the optical fiber slip ring unit 103 is fixed, the other end of the optical fiber slip ring unit rotates with the slip ring body 9, the fixed end of the optical fiber slip ring unit 103 receives a first optical signal from a transmitting photoelectric conversion module 102 (not shown), a second optical signal output by the rotating end of the optical fiber slip ring unit 103 during testing is sent to a transmitting module (not shown), wherein the transmitting module (not shown) also rotates with the slip ring body 9, the second electrical signal output by the transmitting module (not shown) is sent to a transmitting antenna (not shown), and the transmitting 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 for output, and 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, connected with the transmitting module 4 and 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, a first optical module is arranged in the transmitting module, the first optical module converts the optical signal into an electrical signal, then the electrical signal is shaped and amplified through the clock data recovery circuit, the output code pattern and the output speed are guaranteed to be unchanged, then the differential signal is divided into two paths through the differential driving amplifying circuit and is output to the transmitting antenna, the differential signal is the second electrical signal, and the second electrical signal comprises a first differential signal and a second differential signal. The transmitting antennas are arranged in a circle on the circumference of the insulating slip ring body.
The receiving unit 201 comprises a receiving antenna 6, wherein the receiving antenna 6 is arranged at a position adjacent to the transmitting antenna 5 in a capacitive coupling manner and keeps a predetermined distance, and is used for receiving a first differential electrical signal and a second differential electrical signal; the receiving module 7 is connected to the receiving antenna 6, the receiving module is provided with a second optical module, and is configured to perform 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, the receiving photoelectric conversion unit 105 is provided with a third optical module, and is configured to receive the 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.
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 a weak second electrical signal in a capacitive coupling mode, the weak second electrical signal is subjected to data processing such as balanced amplification and data shaping of the receiving module 7 and then transmitted to a second optical module arranged in the receiving module 7, the second optical module outputs a third optical signal, the third optical signal is sent to an optical port of the receiving photoelectric conversion unit 105 in an optical fiber connection mode, the third optical signal is converted into a third electrical signal by the third optical module arranged in the receiving photoelectric conversion module 8 and then output, the third electrical signal is a pair of differential signals of CML (constant current loop) and comprises a third differential signal and a fourth differential signal, the differential signals are connected to an input port of an error code meter, and the error code meter compares output binary data with input binary data to obtain an error code rate.
The utility model also provides a method for testing the error rate of the CT slip ring data transceiver module, the flow chart of which is shown in figure 3, and the device for testing the error rate of the CT slip ring data transceiver module comprises
S110, installing an optical fiber slip ring unit under the condition that the slip ring body to be tested is determined;
specifically, under the condition that the type of the slip ring body is determined, the optical fiber slip ring unit is installed on the slip ring body, the purpose that an input test optical signal rotates at a high speed along with the slip ring body is achieved, the whole test system completely simulates the operation environment of a real CT machine, the test system is suitable for slip ring systems with different diameter requirements, and the test reliability is guaranteed.
S120, acquiring a first electric signal and a third electric signal under the state that the slip ring body runs at a high speed;
specifically, the slip ring body rotates at a high speed, and a first electric signal (differential signal) output by the error code meter test unit is 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 to form an input third electric signal (differential signal).
S130, the error rate testing unit calculates the error rate.
Specifically, the error detector compares the output binary data with the input binary data to obtain the error rate.
In a preferred embodiment, the optical fiber slip ring unit is installed under the condition of determining the slip ring body to be tested, and particularly, 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 in an optical fiber slip ring connection mode, the test environment of real CT operation is completely simulated, and the method is simple and efficient.
When the bit error rate test device of the CT slip ring data transceiver module is used for calculating the bit error rate, the bit error rate tester 1 outputs a first electric signal which comprises two paths of differential electric signals, the first electric signal is input into the transmitting photoelectric conversion module 2 to form a first optical signal, the first optical signal forms a second optical signal output through the optical fiber slip ring unit 3, the second optical signal is input into 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 a first differential signal and a 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 optical 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, the receiving photoelectric conversion module 8 outputs the differential electric signal to the bit error rate tester 1, thus, the error detector can compare the transmitted binary data with the received binary data, thereby obtaining 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, so that the test reliability is ensured.
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 appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A bit error rate testing device of a CT slip ring data transceiver module is characterized by comprising,
the bit error rate testing unit is used for outputting a first electric signal in a working state and calculating the current bit error rate;
the transmitting photoelectric conversion unit is connected with the bit error rate testing unit and used for receiving the first electric signal and performing photoelectric processing to form first optical signal output;
the optical fiber slip ring unit is connected with the transmitting photoelectric conversion unit and used for receiving the first optical signal output to form a second optical signal output;
the processing unit is connected with the optical fiber slip ring unit and used for receiving the second optical signal and carrying out amplification processing to form third optical signal output;
the receiving photoelectric conversion unit is arranged between the processing unit and the error rate testing unit, is respectively connected with the processing unit and the 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 bit error rate is calculated through the first electric signal and the third electric signal.
2. The CT slip ring data transceiver module bit error rate testing device of claim 1, wherein the input end of the optical fiber slip ring unit is fixedly installed on the bracket, the output end of the optical fiber slip ring unit is installed on the slip ring body 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 CT slip ring data transceiver module BER testing device of claim 1, wherein the processing unit comprises,
the transmitting unit is connected with the optical fiber slip ring unit and used for receiving the second optical signal and performing photoelectric processing to form a second electric signal to be output;
and the receiving unit is coupled with the transmitting unit and used for receiving the second electric signal and performing photoelectric processing to form a third optical signal output.
4. The CT slip ring data transceiver module bit error rate testing device as claimed in claim 3, wherein the transmitting unit comprises,
the transmitting module is arranged on the slip ring body and moves along with the slip ring body, the transmitting module is provided with a first optical module and is used for receiving a second optical signal and performing photoelectric processing to form a second electric signal to be output, and the second electric signal comprises a first differential electric signal and a second differential electric signal;
and the transmitting antenna is arranged on the periphery of the slip ring body, connected with the transmitting module and used for receiving and transmitting the first differential electric signal and the second differential electric signal.
5. The CT slip ring data transceiver module BER testing device of claim 3, wherein the receiving unit comprises,
the receiving antenna is arranged at the position adjacent to the transmitting antenna in a capacitive coupling mode, keeps a preset distance and is used for receiving the first differential electric signal and the second differential electric signal;
and 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 third optical signal output.
6. The CT slip ring data transceiver module BER testing device of claim 5, wherein the predetermined distance is 1.6 mm.
7. The device for testing the bit error rate of the CT slip ring data transceiver module as claimed in claim 1, wherein the receiving optical-to-electrical conversion unit is provided with a third optical module for receiving a third optical signal output and performing an optical-to-electrical processing to form a third electrical signal output, and the third electrical signal includes a third differential signal and a fourth differential signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123394890.3U CN216391013U (en) | 2021-12-30 | 2021-12-30 | Error rate testing device for CT slip ring data transceiver module |
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| CN202123394890.3U CN216391013U (en) | 2021-12-30 | 2021-12-30 | Error rate testing device for CT slip ring data transceiver module |
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| CN202123394890.3U Active CN216391013U (en) | 2021-12-30 | 2021-12-30 | Error rate testing device for CT slip ring data transceiver module |
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