Online vocal examination determination method, system, device and storage medium

Abstract

The present application discloses an online vocal test determination method, system, device and storage medium, belonging to the field of online test, including obtaining candidate login information and sending test repertoire to the test terminal display device where the candidate is located, the test terminal selects a test device with a key depression stroke and speed measuring device, a voltage value of the measuring device corresponding to each key, and a digital code of the key, obtains corresponding values ​​from a server according to the test repertoire, the candidate takes the test on the test device to obtain the test value, and compares it with the corresponding value, obtains the correct rate according to the comparison result, obtains the test device score according to the correct rate × 100%, and obtains the final value according to the proportion with the manual scoring score based on the audio and video images, and can accurately obtain the candidate's mastery of piano instruments through the test terminal that combines the test device with the audio and video device, avoiding the judgment of the candidate's mastery by the audio and video device alone.

Description

Technical Field

[0001] The present application belongs to the field of online examinations, and more specifically, relates to an online vocal examination determination method, system, device and storage medium. Background Art

[0002] Online exams are mostly conducted remotely through audio and video signals, and the test results of the examinee are subjectively assessed based on the acquired audio and video signals. If it is a simple text test (such as Chinese, English, history, etc.), students can mostly take the test through a browser, and the teacher can set questions, mark papers, and analyze papers through the browser. However, for online vocal exams, especially the elective subjects of vocal exams, which can increase the professional competitiveness of vocal examinees, examinees choose an instrument to play. The type and difficulty of the instrument vary depending on the type of major and the university, and piano is generally the main instrument. Simple audio and video online exams are often unable to accurately determine the examinee's mastery of the piano.

[0003] Most piano keys are mechanical structures. The keys are installed near the middle through structures such as balance rails and key buttons, and a string-beating mechanism is provided at the end of the key away from the striking end. The pressing stroke of the key (from triggering to reaching the limit position of pressing down) is generally short. The short pressing stroke makes it difficult to measure the pressing stroke and the pressing speed in some scenarios. It is difficult to achieve accurate and intuitive measurement through mechanical measurement methods. In the fingering teaching process, the pressing stroke of the key and the striking speed of the key have a great influence on the playing. At the same time, in the teaching process, the same simulation device as the existing piano keys (such as the simulation device disclosed in Chinese patent announcement numbers CN201156416Y and CN214175670U) can be used for initial teaching.

[0004] The prior art discloses a key characteristic detection device that can detect piano keys and simulated keys. Referring to the patent document with Chinese patent announcement number CN207763940U, the following technical contents are specifically disclosed: it includes a bracket, a working platform, a conveyor belt, a detection bracket and four groups of detection probes. The detection probe includes a probe bracket, a first servo motor, a second servo motor, a first screw rod, a first screw rod nut, a first connecting plate, a first linear bearing, a first circular shaft, a first counterweight, a first pressure sensor, a white key pressure head, a second screw rod, a second screw rod nut, a second connecting plate, a second linear bearing, a second circular shaft, a second counterweight, a second pressure sensor, and a black key pressure head. A driving device, a main control box, a display screen and a printer are provided on the bracket.

[0005] However, the above structure can only detect the performance of the piano, but cannot be integrated with the piano keys to detect the strokes during the use of the piano, such as the depression stroke and depression speed. At the same time, intuitively and accurately measuring the depression stroke and depression speed of the keys in the piano key simulation device can help improve the comprehensive performance of the piano key simulation device. Summary of the invention

[0006] The purpose of this application is to provide an online vocal examination judgment method, system, device and storage medium, which can accurately obtain the examinee's mastery of piano instruments through an examination terminal that combines the examination equipment with audio and video equipment, avoiding the judgment of the examinee's mastery level simply through audio and video devices.

[0007] To achieve the above objectives, this application is implemented through the following technical solutions:

[0008] An online vocal test determination method, the method comprising the following steps:

[0009] S1. Obtain the candidate's login information, which includes the candidate's name, candidate number, and test category;

[0010] S2, obtaining the target test repertoire from the server, and sending the test repertoire to the test terminal display device where the examinee is located;

[0011] S3, the test terminal selects a test device with a key depression stroke and speed measuring device, the test device is located below the corresponding key, and the test device outputs the voltage value of the measuring device corresponding to each key and the digital code of the key;

[0012] S4, obtaining from the server the key digital code sequence corresponding to the test track, the corresponding output voltage interval of the measuring device, and the time interval corresponding to the adjacent key digital codes in the track according to the test track;

[0013] S5, the examinee takes the test on the test device, and compares the key digital codes, the output voltage of the measuring device, and the time interval generated by the test device with the corresponding values ​​in step S2;

[0014] S6. Obtain the accuracy rate based on the comparison results, and obtain the test equipment score based on the accuracy rate × 100%, and obtain the final value in proportion to the manual scoring score based on the audio and video images.

[0015] A test device with a key depression stroke and speed measuring device, comprising a base installed under the keys, a seat body slide groove is arranged on the base, and the characteristics are: a slide plate is slidably arranged in the seat body slide groove, and the slide plate moves relative to the base along the seat body slide groove under the drive of a wheel body, and the top end face of the slide plate is processed with symmetrically arranged installation positioning grooves, and a conductive sheet body is arranged in the installation positioning groove, and the end of the conductive sheet body is electrically connected to the PCB board; the bottom end face of the slide plate and the bottom end face of the seat body slide groove are symmetrically processed with seat body placement grooves, a brush is arranged in the seat body placement groove of the slide plate, and a carbon film resistor is arranged in the seat body placement groove of the seat body slide groove, and a carbon film resistor is arranged in the seat body placement groove of the seat body slide groove. The end of the membrane resistor is electrically connected to the PCB board; a positioning ring body corresponding to the installation positioning groove is fixedly provided on the circumferential outer side surface of the wheel body, and a plurality of ring body electrical blocks are distributed on the positioning ring body. The ring body electrical blocks on adjacent positioning ring bodies are connected by electrical bars, and the electrical bars are located on the circumferential outer side surface of the wheel body; the PCB board is located in the PCB board placement cavity of the base; the wheel body is installed on the wheel body side frames on both sides through the transmission main shaft, the wheel body side frames are located on both sides of the base and fixed to the base as a whole, and the transmission main shaft is connected to the swing connecting rod; a reset spring is provided between the end face of the slide plate and the end face of the seat body slide groove; the swing connecting rod is linked to the piano key.

[0016] As one of the preferred technical solutions of the present application, the transmission main shaft is connected to main shaft gears at both ends located inside the wheel body, and a planetary carrier is connected to the transmission main shaft outside the main shaft gear through a bearing structure. Planetary gears are arranged on the planetary carrier, and the transmission main shaft is meshed with the transmission teeth on the wheel body through the planetary gears. The transmission teeth on the wheel body are located on the circumferential inner wall of the wheel body.

[0017] As one of the preferred technical solutions of the present application, the return spring is connected to the end face of the slide plate and the end face of the seat body slide groove at corresponding positions through a spring mounting seat respectively.

[0018] As one of the preferred technical solutions of the present application, the swing link is located at the bottom end of the spring plate and moves with the spring plate, and the spring plate includes an arc-shaped plate body connected to the base, and the end of the spring plate away from the arc-shaped plate body is a contact end arranged parallel to the base, and the contact end is located below the key; the connecting end of the swing link is processed with a connecting rod connecting hole, and the shaft body of the pressing rod is slidably arranged in the connecting rod connecting hole, and the end of the pressing rod away from the connecting rod connecting hole is located at the bottom end of the contact end and is fixed to the contact end as a whole.

[0019] As one of the preferred technical solutions of the present application, the base is provided with a plurality of base connecting holes at the end away from the skateboard, and the base is connected to the arc-shaped plate body of the spring plate through the base connecting holes and the spring plate connecting parts; the top of the skateboard provided in the seat body slide groove of the base is covered with a linear protective cover, and an arc-shaped protective cover is provided between adjacent wheel body side frames.

[0020] As one of the preferred technical solutions of the present application, skateboard side teeth are arranged on both sides of the skateboard, and the skateboard is meshed and driven with the wheel body side driving teeth arranged correspondingly on the circumferential outer surface of the wheel body through the skateboard side teeth.

[0021] A system for applying an online vocal test determination method comprises a test device and a server. The test device has an analog output port for outputting a voltage signal and a digital port for outputting a key digital code. The server obtains the analog value of the voltage signal and the corresponding key digital code through an analog-to-digital conversion module and records the time of acquisition; compares the obtained voltage signal value and the digital signal of the key digital code with the value in a server storage module and outputs the comparison result; obtains the time difference through the recorded time of adjacent digital signals and compares it with the time difference in the server storage module and outputs the comparison result.

[0022] A storage medium stores an application program for applying an online vocal examination determination method.

[0023] Compared with the prior art, the beneficial effects of this application are:

[0024] 1. This application can accurately obtain the examinee's mastery of piano instruments through an examination terminal that combines examination equipment with audio and video equipment, avoiding judging the examinee's mastery simply through audio and video devices.

[0025] 2. The present application links the swing link with the bottom end of the key simulation device. Specifically, the contact end of the spring plate is located between the front rail hole and the front rail bolt at the front rail position. During the key depression process, it can move together with the key to amplify the key depression stroke, and measure the linear stroke of the amplified depression stroke in different ways to output the linear stroke and the converted depression speed related to the linear stroke, thereby facilitating the measurement and evaluation of intuitive parameters at the depression position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the principle diagram of this application.

[0027] Figure 2 This application is a three-dimensional Figure 1 .

[0028] Figure 3 This application is a three-dimensional Figure 2 .

[0029] Figure 4 This application is a three-dimensional Figure 3 .

[0030] Figure 5 It is a three-dimensional diagram of the present application after removing the linear protective cover and the arc protective cover.

[0031] Figure 6 yes Figure 4 A partial enlarged view of part I.

[0032] Figure 7 It is a stereoscopic view of the present application without the linear protective cover, the arc-shaped protective cover and one side of the wheel body side frame.

[0033] Figure 8 It is a top view of the present application.

[0034] Fig. 9 yes Figure 7 Cross-sectional view at the position and direction shown by AA.

[0035] Fig.10 It is a three-dimensional diagram of the bottom end surface of the slide plate and the seat body slide groove in this application.

[0036] It should be noted that due to the limitation of the drawings, some proportional structures are adaptively adjusted to fully display the structures of the drawings, but this does not affect the understanding of the present application by technicians in this field in combination with the technical solutions recorded in the present application.

[0037] In the figure: 1. base; 2. linear protective cover; 3. arc-shaped protective cover; 4. wheel body side frame; 5. swing connecting rod; 6. connecting rod connecting hole; 7. spring plate connecting piece; 8. spring plate; 9. base connecting hole; 10. down-pressing rod; 11. contact end; 12. reset spring; 13. spring mounting seat; 14. slide plate; 15. seat body slide groove; 16. installation positioning groove; 17. wheel body side driving tooth; 18. positioning ring body; 19. ring body connecting block; 20. connecting strip; 21. planetary frame; 22. slide plate side tooth; 23. conductive sheet; 24. seat body placement groove; 25. carbon film resistor; 26. planetary gear; 27. transmission main shaft; 28. wheel body side transmission tooth; 29. ​​PCB board placement cavity; 30. wheel body. DETAILED DESCRIPTION

[0038] The technical solution described in this application is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Example 1

[0040] An online vocal test determination method, characterized in that the method comprises the following steps:

[0041] S1. Obtain the candidate's login information, which includes the candidate's name, candidate number, and test category;

[0042] S2, obtaining the target test repertoire from the server, and sending the test repertoire to the test terminal display device where the examinee is located;

[0043] S3, the test terminal selects a test device with a key depression stroke and speed measuring device, the test device is located below the corresponding key, and the test device outputs the voltage value of the measuring device corresponding to each key and the digital code of the key;

[0044] S4, obtaining from the server the key digital code sequence corresponding to the test track, the corresponding output voltage interval of the measuring device, and the time interval corresponding to the adjacent key digital codes in the track according to the test track;

[0045] S5, the examinee takes the test on the test device, and compares the key digital codes, the output voltage of the measuring device, and the time interval generated by the test device with the corresponding values ​​in step S2;

[0046] S6. Obtain the accuracy rate based on the comparison results, and obtain the test equipment score based on the accuracy rate × 100%, and obtain the final value in proportion to the manual scoring score based on the audio and video images.

[0047] Example 2

[0048] See also Figures 1 to 9 , an examination device with a key depression stroke and speed measuring device as described in Example 1, comprises a base 1, the base 1 is a long rectangular block, a seat body slide groove 15 of the same length as the base 1 is processed on the top surface of the base 1, a slide plate 14 is slidably arranged in the seat body slide groove 15, the top surface of the slide plate 14 is processed with a pair of mounting positioning grooves 16, a conductive sheet 23 is laid and embedded in the mounting positioning groove 16, and the end of the conductive sheet 23 is electrically connected to the PCB board through a wire or a connecting terminal; the bottom of the slide plate 14 and the bottom surface of the seat body slide groove 15 are processed with a pair of seat body placement grooves 24 at corresponding positions, brushes are respectively arranged in the seat body placement grooves 24 of the slide plate 14, and the brushes of adjacent seat body placement grooves 24 in the slide plate 14 are connected through wires or The terminals are electrically connected; a carbon film resistor 25 is laid and embedded in the seat placement groove 24 of the seat slide groove 15, and the end of the carbon film resistor 25 is electrically connected to the PCB board through a terminal or a wire; the PCB board is located in the PCB board placement cavity 29 of the base 1; skateboard side teeth 22 are provided on both sides of the skateboard 14, and the skateboard side teeth 22 are meshed with the wheel body side driving teeth 17 on both sides of the wheel body 30 for transmission, and the wheel body 30 is integrally provided with a positioning ring body 18 corresponding to the installation positioning groove 16 on the circumferential outer side surface between adjacent wheel body side driving teeth 17, and a plurality of ring body interconnecting blocks 19 are distributed on the positioning ring body 18, and the ring body interconnecting blocks 19 on adjacent positioning ring bodies 18 are electrically connected through interconnecting strips 20, and the interconnecting strips 20 are located on the circumferential outer side surface of the wheel body 30.

[0049] A return spring 12 is arranged between one end of the slide plate 14 and the end corresponding to the seat body slide groove 15 , and both ends of the return spring 12 are respectively fixed to the spring mounting seats 13 at the corresponding end surfaces.

[0050] The wheel body 30 is a hollow structure, and wheel body side transmission teeth 28 are processed on both sides of the inside of the wheel body 30. The wheel body side transmission teeth 28 are respectively engaged with the planetary gears 26 at the corresponding positions for transmission. The planetary gears 26 are located on the planetary carrier 21 at the corresponding positions. The middle position of the planetary carrier 21 is connected to the transmission main shaft 27 through a bearing structure. Both ends of the transmission main shaft 27 pass through the wheel body side frame 4 at the corresponding positions and are connected to the swing connecting rod 5.

[0051] The transmission main shaft 27 has a main shaft gear meshing with the planetary gears 26 for transmission.

[0052] The base 1 is covered with a linear protective cover 2 on the top end surface of the base body slide groove 15, and is covered with an arc-shaped protective cover 3 connected to the wheel body side frame 4 on the outer peripheral surface of the wheel body 30.

[0053] Example 3

[0054] Continue to see Figures 1 to 9 , a test device with a key depression stroke and speed measuring device, wherein the base 1 is fixed with a spring plate 8 at the end near the swing link 5, and the spring plate 8 drives the swing link 5 to move downward. The spring plate 8 is connected to the base 1 through a spring plate connector 7 and a base connection hole 9, and the base connection holes 9 are located on the base 1 and distributed on the base 1; the spring plate 8 is an arc-shaped plate body at the position connected to the base 1, and the spring plate 8 is a contact end 11 at the end away from the base 1, and the contact end 11 is arranged parallel to the base 1. The spring plate 8 is processed with a notch at the position near the arc-shaped plate body, and a downward pressing rod 10 fixed to the spring plate 8 as a whole is arranged at the notch position, one end of the downward pressing rod 10 extends to the position of the contact end 11, and the other end of the downward pressing rod 10 slides along the connecting rod connecting hole 6 through the shaft body, and the connecting rod connecting hole 6 is located on the swing link 5, and the connecting rod connecting hole 6 is a strip-shaped through hole.

[0055] The structure and connection relationship of the remaining parts are the same as the structure and connection relationship described in any of the above embodiments, and will not be repeated here to avoid cumbersome writing.

[0056] Example 4

[0057] A system for applying the online vocal test determination method described in Example 1, the system includes a test device and a server, the test device has an analog output port for outputting a voltage signal and a digital port for outputting a key digital code, the server obtains the analog value of the voltage signal and the corresponding key digital code through an analog-to-digital conversion module and records the time of acquisition; compares the obtained voltage signal value and the digital signal of the key digital code with the value in the server storage module, and outputs the comparison result; obtains the time difference by recording the time of adjacent digital signals, compares it with the time difference in the server storage module, and outputs the comparison result.

[0058] Example 5

[0059] A storage medium stores an application program for applying the online vocal examination determination method described in Example 1.

[0060] Based on the above embodiments, the following paragraphs will continue to describe in detail the technical features involved and the functions and roles played by the technical features in the present technical solution, so as to help technicians in this field to fully understand the technical solution and reproduce it.

[0061] In this application, the server should have an authentication system, that is, it can judge whether the candidate belongs to the test subject and whether the test can be taken according to the candidate's name, candidate number, and test category input by the candidate. If the authentication is passed, the test content corresponding to the candidate in the server is pointed to according to the candidate's name, candidate number, and test category, and the track of the test content is transmitted to the display device of the test terminal, and the test terminal displays the score of the track and the test countdown.

[0062] The server obtains the voltage signal fed back by the test equipment in the test terminal and the digital code of the piano keys. Since the voltage signal is an analog quantity, it needs to be converted into a digital signal through an analog-to-digital conversion module, and the digital code of the piano keys is a digital signal. Both are transmitted to the server. The server receives the above signal and records the time when the signal is obtained.

[0063] After the test, the obtained signal is compared with the standard signal from the beginning to the end of the track, including whether the voltage signal is within the set range, whether the digital code of the key corresponds, and whether the time difference between adjacent keys in the track is within the set range, and the correct rate is output. If the digital code of the key does not correspond, it is judged as an error and no voltage signal comparison is performed.

[0064] In conjunction with manual scoring, for example, the manual scoring can be set to account for 70% of the total score, and the test results obtained by the test equipment are 30%, which is used to comprehensively determine the candidate's score.

[0065] In the present application, the base 1 is a long rectangular plate, and a base slide groove 15 of equal length is processed on the top surface of the base 1, and the bottom end of the base slide groove 15 is located in the middle of the base 1. In the present application, a plurality of base connection holes 9 are processed on the base 1, and the base connection holes 9 are connected to the arc-shaped plate of the spring plate 8 through elastic connectors 7, and the elastic connectors 7 are screws or rivets. The base connection holes 9 can adjust the position of the spring plate 8 to improve the flexibility of its setting.

[0066] In the present application, a slide plate 14 is slidably arranged in the seat body slide groove 15, and slide plate side teeth 22 are integrally arranged at both ends of the slide plate 14. An installation positioning groove 16 is processed at the top position of the slide plate 14, and the installation positioning groove 16 is symmetrically arranged relative to the middle symmetric plane of the slide plate 14. A conductive sheet 23 is laid and embedded in the installation positioning groove 16, and the conductive sheets 23 in adjacent installation positioning grooves 16 are electrically connected to the PCB board through wires or terminals. A positioning ring body 18 is fixedly arranged on the circumferential outer side of the wheel body 30, and the positioning ring body 18 protrudes from the circumferential outer side of the wheel body 30. The positioning ring body 18 is circumferentially distributed with a plurality of notches, and a ring body coupling block 19 is embedded in the notch. The ring body coupling blocks 19 of adjacent positioning ring bodies 18 are electrically connected through a coupling bar 20, and the coupling bar 20 is located in the circumferential outer side of the wheel body 30. In the above structure, the ring body interconnection block 19 and the interconnection strip 20 can realize the conduction of adjacent conductive sheets 23, so that the circuit of the PCB board can sense the conductive circuit and the adjacent conduction interval time, and then realize the measurement of the rotation speed of the wheel body 30, and can also indirectly reflect the downward pressure speed of the swing link 5 that drives the wheel body 30 to rotate.

[0067] The contacting end surfaces of the slide plate 14 and the seat body slide groove 15 are respectively processed with a seat body placement groove 24 , which extends along the length direction of the seat body slide groove 15 and the slide plate 14 , but is located within the linear travel of the slide plate 14 .

[0068] The seat body slide groove 15 is provided with a carbon film resistor 25 in the seat body placement groove 24, and the adjacent carbon film resistors 25 in the seat body slide groove 15 are electrically connected to the PCB board. The seat body placement groove 24 in the slide plate 14 is provided with a brush, and the adjacent brushes in the slide plate 14 are electrically connected. The above structure can realize the conduction of adjacent carbon film resistors 25, and then realize different resistances in the PCB board circuit. The PCB board can generate different output voltages through different resistances. According to the determination of the corresponding relationship between different voltages and linear travel, the linear travel can be measured and the output of the result can be realized.

[0069] In the present application, the PCB board is located in the PCB board placement cavity 29, and the PCB board placement cavity 29 is located at the bottom end of the base 1 and at the lower position of the movement stroke of the slide 14. The PCB board should have a data processing unit and an input circuit and an output circuit that cooperate with the data processing unit. The input circuit should have an analog-to-digital conversion circuit, and the output circuit can be connected to an external display to output the stroke data and speed data after conversion. Specifically, the data processing unit should be able to store the pre-set "resistance→voltage→stroke value" data so as to convert the input different resistance values ​​into voltage values ​​acceptable to the data processing unit, and convert the obtained voltage values ​​into corresponding stroke values, and then output them through the display. At the same time, the data processing unit of the PCB board can also obtain the circuit on-off time interval, which takes effect and starts to be obtained when the resistance obtained changes. The data processing unit obtains the time interval. Since the distance between adjacent ring body interconnecting blocks 19 on the positioning ring body 18 is fixed, the speed value can be calculated through the rotation distance and the time interval to serve as the speed of key striking. The speed value can be segmented to evaluate the speed or strength of key striking.

[0070] In the present application, the base 1 is symmetrically provided with wheel body side frames 4 on both sides, and the wheel body side frames 4 are fixed to the base 1 as a whole. The wheel body side frames 4 are connected to the transmission main shaft 27 through bearings, and the transmission main shaft 27 is connected to the swing connecting rod 5 at the end extending out of the wheel body side frame 4. Since the wheel body 30 is a hollow cylindrical structure, the main shaft gears are fixedly connected to the two ends of the transmission main shaft 27 located inside the wheel body 30, and the main shaft gears are meshed with the planetary gears 26 on the planetary frame 21 for transmission, and the planetary gears 26 are meshed with the wheel body side transmission teeth 28 at the two ends of the inner wall of the wheel body 30 for transmission. The above structure can expand the stroke change of the swing connecting rod 5 following the downward pressure, and then facilitate the measurement of the metering equipment in the above paragraph.

[0071] The swing link 5 is provided with a link connecting hole 6 at the connection position. The link connecting hole 6 is a strip-shaped hole. An axis body at the end of the pressing rod 10 is slidably arranged in the link connecting hole 6. When the pressing rod 10 follows the spring plate 8 to be pressed down, it can drive the swing link 5 to rotate around the transmission main shaft 27.

[0072] The pressing rod 10 is fixedly connected to the contact end 11 of the spring plate 8. The spring plate 8 resets itself under the action of the arc-shaped plate body, and the contact end 11 contacts the pressing position to be detected.

[0073] In the present application, the slide plate 14 is connected with a return spring 12 between the end away from the spring plate 8 and the lower pressure rod 10 and the end of the seat body slide groove 15 away from the spring plate 8 and the lower pressure rod 10, and the return spring 12 is connected to the end surface of the slide plate 14 and the end surface of the seat body slide groove 15 through the spring mounting seat 13. The above structure facilitates the reset of the slide plate 14. A torsion spring is provided at the connection position between the transmission main shaft 27 and the wheel body side frame 4.

[0074] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An examination device with a key depression stroke and speed measuring device, comprising a base (1) mounted below a key, the base (1) being provided with a seat body slide groove (15), characterized in that: A slide plate (14) is slidably arranged in the seat body slide groove (15). The slide plate (14) moves relative to the base (1) along the seat body slide groove (15) under the drive of the wheel body (30). The top end surface of the slide plate (14) is processed with a symmetrically arranged installation positioning groove (16). A conductive sheet (23) is arranged in the installation positioning groove (16). The end of the conductive sheet (23) is electrically connected to the PCB board. The bottom end surface of the slide plate (14) and the bottom end surface of the seat body slide groove (15) are symmetrically processed with a seat body placement groove (24). A brush is arranged in the seat body placement groove (24) of the slide plate (14). A carbon film resistor (25) is arranged in the seat body placement groove (24) of the seat body slide groove (15). The end of the carbon film resistor (25) is electrically connected to the PCB board. The circumferential outer side surface of the wheel body (30) is fixedly provided with a A positioning ring body (18) corresponding to the installation positioning groove (16) is arranged, and a plurality of ring body coupling blocks (19) are distributed on the positioning ring body (18). The ring body coupling blocks (19) on adjacent positioning ring bodies (18) are connected by coupling bars (20), and the coupling bars (20) are located on the circumferential outer side of the wheel body (30); the PCB board is located in a PCB board placement cavity (29) of the base (1); the wheel body (30) is installed on the wheel body side frames (4) on both sides through a transmission main shaft (27), and the wheel body side frames (4) are located on both sides of the base (1) and are fixed to the base (1) as a whole, and the transmission main shaft (27) is connected to a swing connecting rod (5); a return spring (12) is arranged between the end surface of the slide plate (14) and the end surface of the seat body slide groove (15); the swing connecting rod (5) is linked to the piano key; The transmission main shaft (27) is connected to main shaft gears at both ends located inside the wheel body (30), and a planet carrier (21) is connected to the transmission main shaft (27) outside the main shaft gears via a bearing structure, and a planetary gear (26) is arranged on the planetary carrier (21). The transmission main shaft (27) is meshed with the wheel body side transmission teeth (28) through the planetary gears (26) for transmission, and the wheel body side transmission teeth (28) are located on the circumferential inner wall of the wheel body (30); The return spring (12) is connected to the end surface of the slide plate (14) and the end surface of the seat body slide groove (15) at corresponding positions through the spring mounting seat (13); The swing link (5) is located at the bottom end of the spring plate (8) and moves with the spring plate (8), the spring plate (8) includes an arc-shaped plate body connected to the base (1), and the end of the spring plate (8) away from the arc-shaped plate body is a contact end (11) arranged parallel to the base (1), and the contact end (11) is located below the piano key; the connecting end of the swing link (5) is processed with a connecting rod connecting hole (6), and the shaft body of the pressing rod (10) is slidably arranged in the connecting rod connecting hole (6), and the end of the pressing rod (10) away from the connecting rod connecting hole (6) is located at the bottom end of the contact end (11) and is fixed to the contact end (11) as a whole; The online vocal test determination method using the test equipment with the key depression stroke and speed measuring device comprises the following steps: S1. Obtain the candidate's login information, which includes the candidate's name, candidate number, and test category; S2, obtaining the target test repertoire from the server, and sending the test repertoire to the test terminal display device where the examinee is located; S3, the test terminal selects a test device with a key depression stroke and speed measuring device, the test device is located below the corresponding key, and the test device outputs the voltage value of the measuring device corresponding to each key and the digital code of the key; S4, obtaining from the server the key digital code sequence corresponding to the test track, the corresponding output voltage interval of the measuring device, and the time interval corresponding to the adjacent key digital codes in the track according to the test track; S5, the examinee takes the test on the test device, and compares the key digital codes, the output voltage of the measuring device, and the time interval generated by the test device with the corresponding values ​​in step S4; S6. Obtain the accuracy rate based on the comparison results, and obtain the test equipment score based on the accuracy rate × 100%, and obtain the final value in proportion to the manual scoring score based on the audio and video images.

2. The testing device with a key depression stroke and speed measuring device according to claim 1, characterized in that: The base (1) is provided with a plurality of base connection holes (9) at one end away from the slide plate (14), and the base (1) is connected to the arc-shaped plate body of the spring plate (8) through the base connection holes (9) and the spring plate connection piece (7); the top end of the slide plate (14) provided in the base body slide groove (15) of the base (1) is covered with a linear protective cover (2), and an arc-shaped protective cover (3) is provided between adjacent wheel body side frames (4).

3. The testing device with a key depression stroke and speed measuring device according to claim 2, characterized in that: Slide plate side teeth (22) are arranged on both sides of the slide plate (14), and the slide plate (14) is meshed with wheel body side driving teeth (17) arranged correspondingly on the circumferential outer side of the wheel body (30) for transmission via the slide plate side teeth (22).

4. A system using the testing device with the key depression stroke and speed measuring device according to claim 1, characterized in that: The system includes a test device and a server. The test device has an analog output port for outputting a voltage signal and a digital port for outputting a key digital code. The server obtains the analog value of the voltage signal and the corresponding key digital code through an analog-to-digital conversion module and records the time of acquisition; compares the obtained voltage signal value and the digital signal of the key digital code with the value in the server storage module and outputs the comparison result; obtains the time difference by recording the time of adjacent digital signals, compares it with the time difference in the server storage module, and outputs the comparison result.

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