1. Product Overview
GL-XS-01Sensor Experiment ChamberThe use of contemporary advanced sensing detection and control and information processing technology, adhering to the overall design concept of modularization, so that the instrument has unlimited scalability to meet the needs of the development of constantly updated automatic detection, automatic control and electronic disciplines, give full play to the advantages of new technology and strengthen the training of basic knowledge, suitable for innovative and open experimental teaching, is conducive to cultivating students' professional comprehensive ability.
1) The device structure and test circuit are optimized and configured, and the SMT placement process technology is used to process the circuit board in the experimental box, which has high placement reliability and strong seismic resistance; Compared with the traditional cartridge and discrete process technology, SMT chip is firmly mounted due to the use of chip components, and the device is usually no lead or short lead, which reduces the impact of parasitic inductance and parasitic capacitance, improves the high-frequency characteristics of the circuit, reduces electromagnetic and radio frequency interference, and has stable and reliable technical performance due to low additional power consumption.
2) The regulator is independently developed to support more sensor signal input.
3) The PID control meter is more stable and convenient for the expansion of the control mode.
4) The design of the speed test device is smart and convenient, and it supports various speed sensors on the market to meet the needs of different speed sensors purchased for use.
5) The main engine box structure is novel, adopts the first-class proportion design, the appearance is beautiful and atmospheric, the space is suitable, and it is more convenient for students to operate and do experiments. The cabinet is white and the host panel is light blue, which is harmonious and not easy to fatigue; A spring-type weighing rod is designed on the outside of the main chassis and the box cover, and the box cover is closed safely and slowly after the experiment is completed, which effectively avoids the phenomenon of the box cover being clamped.
6) Supporting experimental instruction, based on years of teaching and scientific research practice, combined with the characteristics of the school's basic sensing experiment and sensing comprehensive experimental course, we have jointly compiled the textbook "New Sensing Experiment Course" with senior professors from famous universities, which has been published and distributed by China Science Press.
Second, the product composition
a) Main chassis.
BenSensor Experiment ChamberIt is composed of various parts, such as the motherboard, signal source, sensor, data acquisition card and processing software.
1. a motherboard part.
Provides high stability of 15V, 5V, 4V, 12V 12V adjustable equal DC regulated power supply; The panel is also equipped with a voltage and frequency display meter. Audio source (audio oscillator) 1kHz 10kHz (adjustable); Low-frequency signal source 1Hz 30Hz (adjustable); Intelligent adjustment instrument; USB computer serial interface.
2. Signal source.
Heating source: room temperature 150 (adjustable);
Vibration source: 1 Hz 30Hz;
Rotation source 0 2500r min.
b) Sensors.
1. Resistance strain sensor measuring range 0 500g accuracy 1%;
2. Diffusion silicon pressure sensor: range: 4-28kpa, accuracy 1%;
3. Differential transformer: range 4mm, accuracy 2%;
4. Capacitive sensor range 25mm accuracy 3%;
5. Hall displacement sensor: 1mm range, accuracy 3%;
6. Hall speed sensor with a range of 2400 revolutions and an accuracy of 1%;
7. Magnetoelectric sensor with a range of 2400 revolutions and an accuracy of 2%;
8. Piezoelectric sensor axial sensitivity 20pc g;
9. Proximity current displacement sensor: 1mm range, accuracy 2%;
10. Optical fiber displacement sensor: range 1mm, accuracy 5%;
11. Photoelectric speed sensor with a range of 2400 rpm and an accuracy of 1%;
12. Integrated temperature sensor range: room temperature, -120, accuracy 4%;
13. PT100 platinum resistance range: room temperature, -120, accuracy 4%;
14. K-type thermocouple range: room temperature 120, accuracy 4%;
15. Type E thermocouple range: room temperature 120, accuracy 4%;
16. Gas sensor range: 50 2000ppm;
17. Moisture-sensitive sensor measuring range 10 95%RH;
18. PN junction temperature sensor range room temperature 120;
19. When the range of NTC thermistor is 20, the resistance is 10K.
3) Data acquisition card and processing software.
The acquisition board is independently developed, innovated and upgraded, and adopts industrial-grade solutions to achieve high measurement accuracy and dynamic range to meet the needs of scientific research and development, and the main technical indicators are as follows:
1. It has 8 analog inputs: 6 single-ended voltage inputs or 3 differential inputs, and 2 current inputs;
2. ADC resolution: 12 bits;
3. Maximum sampling rate: 100k s (under all channels);
4. Multiple sampling methods: timing sampling, fixed-length sampling, single-step sampling, real-time sampling;
5. Input low-pass filtering, overvoltage protection;
6. It has 16 digital (switch) input and output: 8 inputs and 8 outputs.
3. Product features
1) Equipped with the latest third-generation sensors, all sensors are disassembled and assembled, a main control equipment only needs to purchase a sensor once in life, if the sensor is damaged in use, it can be sent back to the factory for maintenance, and there is no need to purchase sensors twice for life, which can save 80% of maintenance costs every year.
2) The third-generation sensor abandons the installation method of the first-generation sensor with glue as the main adhesion to avoid degumming and effectively prevent the human injury caused by the release of formaldehyde in the glue in the laboratory.
3) The third-generation sensor can also be disassembled by students themselves (with professional tools), which is more conducive to showing students the structure, more conducive to students' understanding of the principle of sensors, and more conducive to stimulating students' interest in technology research and development.
4) The instrument is equipped with a temperature source and other heating devices. The whole instrument adopts a portable box structure, which is easy to manage, and it is easy to keep and store after the experiment is completed.
5) The use of SMT chip circuit technology can effectively improve the experimental accuracy and effectively improve the seismic effect of the equipment.
6) The sensor tends to be the structure of the industrial detection sensor, and the qualitative and quantitative combination of the sensor has a high accuracy, which is more convenient for the computer to do the characteristic analysis of the experiment.
7) Various public sources can also be used for students' course design, graduation project and some developmental experimentsThe power supply and signal source are equipped with protection circuits to ensure that students are not easy to damage the equipment and ensure the safety of students after misoperation.
8) Combining the respective advantages of 998 and 2000, the structure of the sensor has shifted from the principle to the industrial detection sensor, and the sensor has shifted from qualitative to quantitative, with a certain accuracy, which is more convenient for the computer to do the characteristic analysis of the experiment.
9) It can also be used for students' course design, graduation project and some developmental experimentsThe power supply and signal source are equipped with protection circuits to ensure that students will not damage the equipment and ensure the safety of students after misoperation.
Fourth, the experimental itemsPurpose
1) Single-arm bridge performance test of metal foil strain gauge.
2) Half-bridge performance test of metal foil strain gauge.
3) Full-bridge performance test of metal foil strain gauge.
4) Comparative experiments on the performance of metal foil strain gauges in single arm, half bridge and full bridge.
5) Temperature influence test of metal foil strain gauge
6) Application of DC full bridge - electronic scale experiment.
7) Application of AC full bridge - vibration measurement experiment.
8) Pressure measurement experiment of diffusion silicon piezoresistive pressure sensor.
9) Performance test of differential transformer.
10) Experiment on the influence of excitation frequency on the characteristics of differential transformer.
11) Differential transformer zero residual voltage compensation experiment.
12) Application of differential transformer Vibration measurement experiment.
13) Displacement characteristics of capacitive sensors.
14) Experiments on the dynamic characteristics of capacitive sensors.
15) Experiment on the displacement characteristics of Hall sensors during DC excitation.
16) Experiments on the displacement characteristics of Hall sensors during AC excitation.
XVII) Hall speed measurement experiment.
18) Speed measurement experiment of magnetoelectric speed sensor.
19) Measured by the principle of magnetoelectricity***
20) Vibration measurement experiment of piezoelectric sensor.
21) Displacement characteristics of eddy current sensors.
22) Experiment on the influence of the material of the measured body on the characteristics of the eddy current sensor.
23) The influence of the size of the measured body on the characteristics of the eddy-current sensor.
24) Vibration experiments for eddy current sensor measurements.
25) Eddy current sensor speed measurement experiment*
26) Displacement characteristics experiment of optical fiber sensor.
27) Optical fiber sensor measurement vibration experiment.
28) Rotational speed measurement experiment of photoelectric speed sensor.
29) Other solutions for measuring rotational speed using photoelectric sensors*
30) Temperature characteristics experiment with integrated temperature sensor.
31) Experiments on the temperature characteristics of platinum resistance.
32) K-type thermocouple temperature measurement experiment.
33) Principle experiment of gas-sensitive sensors sensitive to alcohol.
xxxiv) Experiments with humidity sensors.
35) Temperature measurement experiment of PN junction temperature sensor.
36) NTC thermistor performance test.
37) Data acquisition system experiments (static examples).
38) Data acquisition system experiments (dynamic examples).