CN112067849B - Speedometer sensor calibration system - Google Patents
Speedometer sensor calibration system Download PDFInfo
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- CN112067849B CN112067849B CN202011005700.1A CN202011005700A CN112067849B CN 112067849 B CN112067849 B CN 112067849B CN 202011005700 A CN202011005700 A CN 202011005700A CN 112067849 B CN112067849 B CN 112067849B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
Abstract
The invention discloses a speedometer sensor calibration system which comprises a signal generation device and an electric control device, wherein the signal generation device comprises a driving part and a clamping part. The clamping part clamps a sensor to be measured or a probe of the sensor to be measured which is installed on the motor vehicle, and then the electric control device sets a first set rotating speed of the driving part according to the model of the sensor and the current clamping parameters so as to enable the driving part to rotate the clamping part at the first set rotating speed. And finally, the electrical control module acquires the second rotating speed of the sensor to be measured, and automatically generates a measurement certificate of the sensor to be measured after comparing the second rotating speed with the first set rotating speed. The invention can finish the calibration work without detaching the sensor from the motor vehicle, thereby improving the calibration efficiency and being convenient to carry.
Description
Technical Field
The invention relates to the technical field of instrument calibration, in particular to a speedometer sensor calibration system.
Background
The speedometer is a special measuring instrument for measuring the speed of the train, and a speedometer indicator is arranged on a driver operating console of a locomotive or a motor train unit. In the field of locomotives or motor vehicles, a magnetoelectric speedometer and a photoelectric speedometer are generally adopted to measure the speed of the locomotive. The indication of the speedometer depends on a speed sensor, the sensor is arranged on a gearbox, different rotating speeds of the locomotive are measured, different pulse signals are obtained and then converted into pointer output, and therefore a driver on a driver operating platform can check the current speed through a speedometer indicator.
In order to ensure the driving safety of the motor vehicle, the display speed of the speedometer indicator is slightly higher than the actual speed, and the speedometer and the measuring instruments must be subjected to periodic verification, wherein the verification period does not exceed one year at most. In the existing verification of the speedometer sensor, the speedometer to be detected is taken to a verification table of a laboratory for calibration after being detached from a driven vehicle. Because a train of motor cars may be provided with a plurality of speedometer sensors, if all the sensors are disassembled, verified and then checked, the work is complex and the labor intensity is high. Secondly, when the sensor is calibrated on the calibration stand, the secondary instrument cannot be calibrated, and the reliable operation of the whole set of equipment cannot be guaranteed. Secondary meters are meters mounted on a control screen remote from the process pipeline or equipment for indicating, recording, or integrating the measurements from the primary meter. Finally, the calibration table is a large-scale table-type device, is inconvenient to carry, cannot be brought to a field for use, and is not high in calibration work efficiency.
Disclosure of Invention
The embodiment of the invention provides a speedometer sensor calibration system, which can finish calibration work without detaching a sensor from a motor vehicle, improves calibration efficiency and is convenient to carry.
The embodiment of the invention provides a speedometer sensor calibration system, which comprises: a signal generating device and an electrical control device; wherein the signal generating device comprises: the clamping device comprises a driving part and a clamping part connected with the driving part;
the clamping part is used for clamping the sensor to be measured or a probe of the sensor to be measured; wherein the sensor under test is mounted on a motor vehicle;
the electric control device is used for setting a first set rotating speed of the driving part according to the model of the detected sensor and the clamping parameters of the clamping part during current clamping so as to enable the driving part to rotate the clamping part at the first set speed;
the electric control module is also used for acquiring a second rotating speed of the sensor to be measured during rotation, comparing the second rotating speed with the first set speed, and automatically generating a measurement certificate of the sensor to be measured according to a comparison result.
Further, the clamping part is also used for clamping a standard sensor, and the standard sensor is a sensor which is successfully calibrated;
when the clamping part only clamps the standard sensor, the electric control module sets a third set rotating speed of the driving part according to the model of the standard sensor and the clamping parameters of the clamping part during current clamping so that the driving part rotates the clamping part at the third set rotating speed;
the electrical control module is also used for acquiring a fourth rotating speed displayed by the secondary instrument to be measured, comparing the fourth rotating speed with the third set speed, and automatically generating a measurement certificate of the secondary instrument to be measured according to a comparison result; the secondary instrument to be tested is arranged on the motor vehicle and is used for displaying the rotating speed of the standard sensor during rotation.
Further, the driving part comprises a motor driver and a motor connected with the motor driver;
the clamping part comprises a fixing tool, a coded disc and a plurality of clamp openings;
the plurality of clamp openings are arranged on the fixing tool, each clamp opening can correspondingly clamp the sensors or probes of the sensors with different sizes, and each clamp opening is aligned with the gear on the code disc;
the coded disc is a coded disc capable of adjusting the number of teeth of the gear;
the motor is connected with the coded disc through a connecting shaft and is used for driving the connecting shaft and the coded disc to rotate.
Further, the electric control apparatus includes: the system comprises an embedded computer, a signal isolator, a power supply module and a signal acquisition card;
the signal isolator and the power supply module are respectively connected with the sensor to be tested; the embedded computer is connected with the power supply module and the signal acquisition card respectively; the signal isolator is connected with the signal acquisition card;
the signal isolator is used for isolating the measurement signal uploaded by the sensor to be measured and transmitting the processed measurement signal to the signal acquisition card;
the signal acquisition card is used for carrying out signal conversion on the measurement signal transmitted by the signal isolator and transmitting the converted measurement signal to the embedded computer;
the embedded computer is used for reading and recording the measurement signals transmitted by the signal acquisition card and converting the measurement signals into rotating speed data;
the power supply module is used for supplying power to the sensors to be tested of different models.
Furthermore, the embedded computer is also used for setting a first set rotating speed of the driving part according to the model of the sensor to be tested and the clamping parameters of the clamping part during current clamping, and sending the first set rotating speed to the driving part so as to enable the driving part to rotate the clamping part at the first set speed;
the embedded computer is also used for obtaining a second rotating speed of the sensor to be measured when the sensor to be measured rotates, comparing the second rotating speed with the first set speed, and automatically generating a measurement certificate of the sensor to be measured according to a comparison result.
Further, the power supply module includes: the device comprises a 5V direct current power supply module, a 12V direct current power supply module, a 24V direct current power supply module, a 48V direct current power supply module and a 220V-to-110V alternating current transformer.
Furthermore, the signal generating device and the electrical control device are arranged in the same case structure.
Further, the sensor to be measured comprises a magnetoelectric sensor, a magnetoresistive sensor, a photoelectric sensor, a hall sensor or an eddy current sensor.
Therefore, the speedometer sensor calibration system disclosed by the embodiment of the invention comprises the signal generation device and the electric control device, wherein the signal generation device comprises the driving part and the clamping part. The clamping part clamps a sensor to be tested or a probe of the sensor to be tested, which is arranged on the motor vehicle, and then the electric control device sets a first set rotating speed of the driving part according to the model of the sensor and the current clamping parameters, so that the driving part rotates the clamping part at the first set rotating speed. And finally, the electrical control module acquires the second rotating speed of the sensor to be measured, and automatically generates a measurement certificate of the sensor to be measured after comparing the second rotating speed with the first set rotating speed. Compared with the prior art that the sensor needs to be detached from the train and the calibration of the sensor needs to be completed on the calibration table, the calibration device can complete calibration work without detaching the sensor from the train, improves calibration efficiency and is convenient to carry.
Furthermore, the clamping part is also used for clamping the standard sensor, the calibration of the secondary instrument to be tested on the motor vehicle can be realized through the clamping standard sensor, the calibration working efficiency is improved, and the normal and reliable operation of the equipment is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of a speedometer sensor calibration system provided by the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a signal generating apparatus according to an embodiment of the present invention.
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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to FIG. 1, FIG. 1 is a schematic structural view of one embodiment of a speedometer sensor calibration system provided by the present invention. As shown in fig. 1, the system comprises a signal generating device 1 and an electric control device 2; wherein, signal generating device 1 includes: a driving part 11 and a clamping part 12 connected with the driving part 11.
In the present embodiment, the clamping portion 11 is used for clamping the sensor under test or the probe of the sensor under test; wherein the sensor to be tested is mounted on the motor vehicle. The motor vehicle can be but is not limited to a large vehicle such as a motor car, a train and the like. During detection, the sensor to be detected does not need to be detached from the motor vehicle, and only needs to be clamped, adjusted and aligned in position by the clamping part 11 or a probe of the sensor.
In this embodiment, referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a signal generating device according to an embodiment of the present invention. As shown in fig. 2, the signal generating device includes a fixing tool 102, a clamp opening 103, a motor 104, a code wheel 105, and a connecting shaft 106.
The drive section 12 includes a motor driver (not shown in fig. 2) and a motor 104 connected to the motor driver. The clamping portion 11 includes a fixing tool 102, a code wheel 105 and a plurality of clamp openings 103. Wherein the sensor 101 under test is fixed to the tool and its position is adjusted so that the sensor or its probe is aligned with the gear on the code wheel 105. The fixing tool 102 is provided with a plurality of clamp openings 103, and sensors or probes of different types and sizes can be fixed. The code wheel 105 is a code wheel with adjustable gear tooth number, and code wheels with different tooth numbers can be selected according to actual needs. The motor 104 is connected with the code wheel 105 through a connecting shaft 106 and is used for driving the connecting shaft 106 and the code wheel 105 to rotate. The detected sensor 101 can be accessed to a corresponding signal acquisition interface on the electrical control device 2 through a signal output line, and is accessed to a reserved power interface on the electrical control device 2 through a power line, so that the electrical control device 2 can acquire the rotating speed data of the detected sensor 101 and supply power to the rotating speed data.
In the present embodiment, the electrical control apparatus includes: the system comprises an embedded computer, a signal isolator, a power supply module and a signal acquisition card. The signal isolator and the power supply module are respectively connected with the sensor to be tested; the embedded computer is connected with the power supply module and the signal acquisition card respectively; the signal isolator is connected with the signal acquisition card.
The signal isolator is used for isolating the measuring signal uploaded by the sensor to be measured and transmitting the processed measuring signal to the signal acquisition card. The signal isolator can be but not limited to a one-input two-output signal isolator, and is used for isolating the measurement signal of the sensor to be tested, isolating the interference signal, transmitting the processed signal to the signal acquisition card, and simultaneously transmitting the signal to the meter head, so as to realize the one-input two-output of the signal.
The signal acquisition card is used for carrying out signal conversion on the measurement signal transmitted by the signal isolator and transmitting the converted measurement signal to the embedded computer. The signal acquisition card can acquire various types of measurement signals and convert the measurement signals into digital signals. Because the types of the sensors are various, a multifunctional IO signal acquisition card needs to be equipped to realize the signal conversion of various types of signals.
The embedded computer is used for reading and recording the measuring signals transmitted by the signal acquisition card and converting the measuring signals into rotating speed data. In this embodiment, the embedded computer is an embedded 8-inch computer with a touch function, and can realize the setting of the rotating speed, the rotating speed display and the display of the rotating speed curve, and simultaneously realize the setting of the rotating speed, the rotating radius, the tooth number and the sampling frequency.
The power supply module is used for supplying power to the sensors to be tested of different models. The power supply module can include, but is not limited to, a 5V DC power supply module, a 12V DC power supply module, a 24V DC power supply module, a 48V DC power supply module, and a 220V to 110V AC transformer, and can provide an interface for outputting 110V AC and 5V, 12V, 24V, 48V DC in a single way. The voltage of the direct current power supply can be dynamically adjusted according to actual conditions, such as 10V, 36V and the like. The voltage output interface simultaneously supports the banana socket and the spring wire pressing terminal.
In the present embodiment, the electrical control device 2 is configured to set a first set rotation speed of the driving portion 12 according to the model of the detected sensor 101 and the clamping parameter when the clamping portion is currently clamped, so that the driving portion 12 rotates the clamping portion 11 at the first set rotation speed. The electrical control module 2 is further configured to obtain a second rotation speed of the sensor 101 to be measured during rotation, compare the second rotation speed with the first set speed, and automatically generate a measurement certificate of the sensor 101 to be measured according to a comparison result.
Since the electrical control device 2 in this embodiment is provided with the embedded computer, the embedded computer is also used for setting the first set rotation speed of the driving portion according to the model of the sensor to be tested and the clamping parameter of the clamping portion 11 during current clamping, and sending the first set rotation speed to the driving portion 12, so that the driving portion 12 rotates the clamping portion 11 at the first set speed. The embedded computer is also used for obtaining a second rotating speed of the sensor to be measured when the sensor to be measured rotates, comparing the second rotating speed with the first set speed, and automatically generating a measurement certificate of the sensor to be measured according to a comparison result.
In this embodiment, the clamping parameters include the number of code wheel teeth and the code wheel radius. When testing the sensor to be tested, the clamping part sensor or the probe thereof is aligned with the gear on the code disc, and the first set speed of the sensor is in a normal working range according to the type and the clamping parameters of the sensor. If the calculation is saved, the user can select the corresponding tooth number and the corresponding code wheel according to the previous measurement experience, and directly determine the first set speed. The embedded computer sends the first set speed to the driving part 12, and the motor driver drives the motor 104 to rotate the clamping part 11 at the first set speed. At this time, the sensor 101 to be measured on the clamping part 11 also rotates, the measurement signal thereof sequentially passes through the signal isolator and the signal acquisition card and then reaches the embedded computer, and the embedded computer obtains the second rotating speed of the sensor to be measured during rotation. And then the embedded computer compares the second rotating speed with the first set speed, and automatically generates a measurement certificate of the measured sensor according to the comparison result. During comparison, an error threshold value can be set, when the two rotating speeds are within the threshold value range, the detected sensor is determined to be normal, and if the error is large, the detected sensor is determined to be abnormal, and hardware or software calibration is needed. The measurement certificate can record the electronic record of the measured sensor for subsequent source tracing or data sorting.
In this embodiment, the embedded computer further supports functions of Excel data derivation, speed-time curve drawing, and the like. The sensor to be measured comprises a magnetoelectric sensor, a magnetoresistive sensor, a photoelectric sensor, a Hall sensor or an eddy current sensor. Meanwhile, the calibration system can also calibrate the photoelectric or mechanical, handheld, contact or non-contact type tachometers and the like.
In this embodiment, the speedometer sensor calibration system is an integral box structure, and the signal generating device 1 and the electrical control device 2 are arranged in the same case structure, so that the speedometer sensor calibration system is convenient to carry to the field, and the problem of large volume of the existing calibration stand is solved.
As an example of the embodiment, the speedometer sensor calibration system of the present invention may also implement calibration of secondary meters on a motor vehicle. Secondary meters are meters mounted on a control screen remote from the process pipeline or equipment for indicating, recording, or integrating the measurements from the primary meter. Specifically, the clamping portion 11 clamps a standard sensor, which is a sensor successfully calibrated. When the secondary meter measurement is carried out, the standard sensor can be the measured sensor which is successfully calibrated in the above mode, rewiring is not needed, and the sensor which is normally calibrated can be externally brought.
If an externally brought standard sensor is used and the calibration of the sensor to be measured is performed as described above, the sensor to be measured needs to be detached first, and the standard sensor is mounted on the clamping portion 11 and aligned with the code wheel gear. At this time, the electric control module 2 sets a third set rotation speed of the driving part 12 according to the model number of the standard sensor and the clamping parameter, so that the driving part 12 rotates the clamping part 11 at the third set speed. The electric control module 2 is also used for acquiring a fourth rotating speed displayed by the secondary instrument to be measured, comparing the fourth rotating speed with the third set speed, and automatically generating a measurement certificate of the secondary instrument to be measured according to a comparison result; the secondary instrument to be tested is mounted on the motor vehicle and is used for displaying the rotating speed of the standard sensor during rotation.
The secondary instrument to be measured is arranged on the motor vehicle, the wiring of the standard sensor is connected with the secondary instrument to be measured (a measuring signal is transmitted to the secondary instrument through the one-in two-out isolator so that the secondary instrument displays corresponding data), the fourth rotating speed displayed by the secondary instrument to be measured is the actual rotating speed of the standard sensor, but the display data of the secondary instrument to be measured is not necessarily the actual rotating speed of the standard sensor because a transmission error may occur in the data transmission process. According to the invention, the displayed fourth rotating speed is compared with the third set speed, so that whether the measured secondary instrument is normal or not is confirmed, a corresponding measurement certificate is generated, and the calibration measurement of the secondary instrument is realized.
From the above, the speedometer sensor calibration system of the present invention has the following beneficial effects:
(1) the portable speedometer calibration system is simple and reasonable in structure and low in cost, and the integrated box body structure can be brought to the site for calibration;
(2) the sensor and the secondary instrument can be calibrated, so that the normal and reliable operation of equipment is guaranteed;
(3) automatic testing is realized, the manpower influence is reduced, and the calibration work efficiency is increased.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. A speedometer sensor calibration system, comprising: the device comprises a signal generating device and an electric control device; wherein the signal generating device comprises: the clamping device comprises a driving part and a clamping part connected with the driving part;
the clamping part is used for clamping a sensor to be measured or a probe of the sensor to be measured; wherein the sensor under test is mounted on a motor vehicle; the clamping part is also used for clamping a standard sensor, and the standard sensor is a sensor which is successfully calibrated; when the clamping part only clamps the standard sensor, the electric control module sets a third set rotating speed of the driving part according to the model of the standard sensor and the clamping parameters of the clamping part during current clamping, so that the driving part rotates the clamping part at the third set rotating speed; the electrical control module is also used for acquiring a fourth rotating speed displayed by the secondary instrument to be measured, comparing the fourth rotating speed with the third set speed, and automatically generating a measurement certificate of the secondary instrument to be measured according to a comparison result; the secondary instrument to be tested is installed on the motor vehicle and is used for displaying the rotating speed of the standard sensor during rotation;
the electric control device is used for setting a first set rotating speed of the driving part according to the type of the detected sensor and the clamping parameters of the clamping part during current clamping so as to enable the driving part to rotate the clamping part at the first set speed;
the electric control module is also used for acquiring a second rotating speed of the sensor to be measured during rotation, comparing the second rotating speed with the first set speed, and automatically generating a measurement certificate of the sensor to be measured according to a comparison result.
2. The speedometer sensor calibration system of claim 1, wherein the drive section comprises a motor driver and a motor connected to the motor driver;
the clamping part comprises a fixing tool, a coded disc and a plurality of clamp openings;
the plurality of clamp openings are arranged on the fixing tool, each clamp opening can correspondingly clamp the sensors or probes of the sensors with different sizes, and each clamp opening is aligned with the gear on the code disc;
the coded disc is a coded disc capable of adjusting the number of teeth of the gear;
the motor is connected with the coded disc through a connecting shaft and is used for driving the connecting shaft and the coded disc to rotate.
3. The speedometer sensor calibration system according to claim 2, wherein the electrical control device comprises: the system comprises an embedded computer, a signal isolator, a power supply module and a signal acquisition card;
the signal isolator and the power supply module are respectively connected with the sensor to be tested; the embedded computer is connected with the power supply module and the signal acquisition card respectively; the signal isolator is connected with the signal acquisition card;
the signal isolator is used for isolating the measurement signal uploaded by the sensor to be tested and transmitting the processed measurement signal to the signal acquisition card;
the signal acquisition card is used for carrying out signal conversion on the measurement signal transmitted by the signal isolator and transmitting the converted measurement signal to the embedded computer;
the embedded computer is used for reading and recording the measuring signals transmitted by the signal acquisition card and converting the measuring signals into rotating speed data;
the power supply module is used for supplying power to the sensors to be tested of different models.
4. The speedometer sensor calibration system according to claim 3, wherein the embedded computer is further configured to set a first set rotation speed of the driving portion according to the model of the sensor to be tested and the clamping parameters of the clamping portion during current clamping, and send the first set rotation speed to the driving portion, so that the driving portion rotates the clamping portion at the first set speed;
the embedded computer is also used for obtaining a second rotating speed of the sensor to be measured when the sensor to be measured rotates, comparing the second rotating speed with the first set speed, and automatically generating a measurement certificate of the sensor to be measured according to a comparison result.
5. The speedometer sensor calibration system according to claim 4, wherein the power supply module comprises: the device comprises a 5V direct current power supply module, a 12V direct current power supply module, a 24V direct current power supply module, a 48V direct current power supply module and a 220V-to-110V alternating current transformer.
6. The speedometer sensor calibration system of claim 5, wherein the signal generating means and the electrical control means are disposed within the same housing structure.
7. The speedometer sensor calibration system of claim 6, wherein the measured sensor comprises a magnetoelectric, magnetoresistive, photoelectric, hall or eddy current sensor.
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| CN202011005700.1A CN112067849B (en) | 2020-09-23 | 2020-09-23 | Speedometer sensor calibration system |
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| CN202011005700.1A CN112067849B (en) | 2020-09-23 | 2020-09-23 | Speedometer sensor calibration system |
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| CN112763232A (en) * | 2021-01-22 | 2021-05-07 | 上海市计量测试技术研究院 | Supervision system and supervision method for motor vehicle inspection equipment |
| CN113219207A (en) * | 2021-05-07 | 2021-08-06 | 河南柴油机重工有限责任公司 | Quick detection device of multivoltage multichannel revolution speed sensor |
| CN115494264B (en) * | 2022-11-08 | 2023-03-10 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Detection device and method of velocimeter for measuring speed by two parallel light beams |
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| CN205786690U (en) * | 2016-06-27 | 2016-12-07 | 西安热工研究院有限公司 | Multichannel calibrating device for rotational speed sensor |
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