OneProduct Introduction
GL998 typeSensor ExperimenterThe equipment includes the measured body, sensor, signal source, processing circuit, instrument display and data acquisition card and processing software, constituting a complete test system, the experimental instrument is compact, small and lightweight, using linear power supply, small ripple interference, high safety factor. It is suitable for the teaching needs of different categories and different levels of colleges and universities, and can be used for experimental teaching of courses such as "sensor technology", "industrial automation", "non-electric power measurement technology and application", "engineering testing technology and application".
1) Sensor mounting table part.
The free end of the double parallel vibrating beam and the lower part of the vibrating disc are equipped with magnets, and the low-frequency exciter can be connected to the low-frequency exciter through their respective micrometer heads or excitation coils for static or dynamic measurement. The strain beam is made of stainless steel sheet, and the end of the double girder structure has a good linear displacement.
b) Sensors.
1. Metal strain sensor.
Platinum strain resistance value: 350 4, temperature compensation sheet 350 2;
2. Thermocouple (thermoelectric) sensor.
DC resistance: about 10, composed of two copper-copper-copperstone thermocouples connected in series, the graduation number is t, and the cold junction temperature is the ambient temperature;
3. Differential transformer.
Range: 5mm DC resistance: 5 10, a transparent hollow coil wound by a primary and two secondary coils, and the core is soft ferrite;
Inductive solenoid sensors.
Measuring range 5mm;
5. Eddy-current displacement sensor:
Range: 3mm, DC resistance: 1 2, composed of flat coil and metal eddy sheet wound by multi-strand enameled wire;
6. Hall sensor.
The linear semiconductor hall plate produced by JVC company in Japan is placed in a gradient magnetic field composed of ring magnets, with a range of 3mm;
7. Magnetoelectric sensor.
DC resistance: 30 40, composed of coil and core, sensitivity: 05v/m/s；
8. Piezoelectric accelerometer.
It consists of two ceramic piezoelectric wafers and copper masses. Resonant frequency: >35Hz;
9. Capacitive sensor.
Range: 5mm, differential variable area capacitive sensor composed of two sets of fixed pieces and one set of moving pieces;
10. Piezoresistive pressure sensor.
Range: 15kpa, power supply: 4V;
11. Optical fiber sensor.
Light-guiding sensor composed of optical fiber, transmitting and receiving circuits in a semi-circular distribution, linear range: 1mm, infrared transmitting and receiving;
12. PN junction temperature sensor.
The temperature sensor made of semiconductor PN junction has a sensitivity of -2mV;
13. a thermistor.
Semiconductor thermistor NTC: Negative temperature system, 10K at 25;
14. a gas sensor.
Alcohol, measurement range: 50-2000ppm;
15. a moisture resistor.
Polymer thin film resistance type: RH: a few m - a few K, response time: moisture absorption, dehumidification less than 10 seconds. Humidity coefficient: 05 rh%, measuring range: 10%R11--95%RH, operating temperature: 0--50;
16. Photoelectric speed sensor.
It is composed of optocoupler, Darlington output and shaping circuit, n 2400r min.
3) Signal and Transformation.
1. A bridge. It is used to form strain bridges, provide bridge sockets, standard resistors and AC and DC balance networks;
2. Difference amplifier.
The pass band is 0-10kHz, which can be connected to a DC amplifier with inverting, inverting and differential input structure, and the gain is 1-100 times;
3. Capacitor converter.
a processing circuit consisting of high-frequency oscillation, amplification and a double-T bridge;
4. Voltage amplifier.
The gain is about 5 times, in-phase input, and the pass band is 0-10kHz;
5. a phase shifter.
The maximum allowable input voltage is 10VP-P, and the phase shift range is 20° (at 50kHz);
6. Phase-sensitive detector.
The frequency of detectable voltage is 0-10kHz, the maximum input voltage is 10vp-p, and the polarity flip shaping circuit and electronic switch are composed of the detection circuit;
7. Charge amplifier.
Capacitive feedback amplifier to amplify the output signal of a piezoelectric sensor;
8. Low-pass filter.
It is composed of 50Hz notch and RC low-pass filter, and the transition frequency is 35Hz;
9. Eddy current converter.
Output voltage 8 V (probe leaves DUT). Frequency conversion amplitude modulation conversion circuit, the sensor coil is the inductive element in the oscillation circuit;
10. Photoelectric converter seat (component of optical fiber sensor).
It is composed of infrared emitting and receiving tubes.
4) Two sets of display instruments.
Digital voltage and frequency meter Tachometer: 3 and a half digits display, voltage measurement range 0-200mV, 0-2V, 0-20V, frequency display range 0-9999Hz, speed display range 0-9999R m.
5) Two types of oscillators.
1. Audio oscillator: 0The output of 4kHz-10kHz is continuously adjustable, the V-P-P value is 20V° inverting output, and the maximum power output current at the LV terminal is 05a；
2. Low-frequency oscillator: 1-30Hz output continuously adjustable, VP-P value 20V, maximum output current 0The 5A and VI terminals can be supplied as current amplifiers.
6) Two sets of cantilever beams and micrometer heads.
Two pairs of double parallel cantilever beams (one of which is a strain beam and the other is connected to the vibrating disc inside), the beam end is equipped with permanent magnets, excitation coils and detachable spiral micrometers, which can carry out pressure displacement and vibration experiments.
7) Two groups of electric heaters.
It is composed of a heating wire, and when heated, it can obtain a temperature rise of about 30 degrees above the ambient temperature.
8) A set of speed measuring motors.
It is composed of an adjustable low-noise high-speed axial fan, which is used in conjunction with photoelectric, optical fiber, and eddy current sensors for speed measurement experiments.
9) Two groups of regulated power supplies.
DC 15V, mainly provide high-performance low-wave decimal temperature temperature heating power supply, maximum excitation 15a。2V 10V five gear output, maximum output current 1A.
10) Information and attachments.
Experimental guides, experimental accessories (experimental stacking cables, a variety of eddy current test pieces, weighing weights, signal cables, etc.).
IIv10.0 data capture card and processing software
1) Data acquisition card and processing software.
v10.0 data collector is in the original v8An upgraded version based on version 0, v100 adopts industrial-grade perfect solution, achieves high measurement accuracy and dynamic range, and the communication interface is USB, which is convenient for users to use. The collector can not only meet the experimental requirements, replace the existing meter display readings, but also can be used as a direct scientific research and development for scientific researchers. The specific technical indicators are as follows:
1. Interface standard: USB;
2. A d: 12 bits;
3. Number of channels: 2 channels;
4. Sampling frequency: 100kHz (binning optional);
5. Measurement error: 02mv；
6. Measurement range: up to plus or minus 15V;
7. Support direct input of voltage and current signals, no need to equip converter;
8. Environment: win7;
9. Software: Equipped with a complete set of experimental software packages for sensor comprehensive experimental systems and high-link virtual instrument software packages (such as virtual oscilloscopes, spectrum analysis, distortion analysis, etc.).
b) Virtual Software:
This software is and v100 card matching, USB interface for communication, USB11 standard protocol, is an efficient, real-time data acquisition system. The acquisition system can be used to collect external signals separately or in conjunction with the sensor tester software on our range of sensor test benches. The operating system is win7, win10 or above. The main features of the software are as follows:
1. The software is written in accordance with the company's experimental instructions, and most of the experiments can be experimented with this data acquisition software.
Make; 2. The software acquisition settings can be divided into single-step sampling, timing sampling, two-way sampling, and dynamic sampling. In a single step.
The maximum nonlinearity error or maximum hysteresis error can be analyzed by the least squares method and the endpoint method, and the frequency, amplitude or rotation speed of the input waveform can be analyzed during dynamic experiments.
3. Support printing function, can print out the experimental results after the experiment;
4. The hardware of the capture card has the function of program-controlled amplification, which can have high precision when measuring small voltage;
5. The communication rate is V8 during data acquisition0 data acquisition card based on a great improvement;
6. The data acquisition software supports USB11. Communication;
7. Support differential input function;
8. Support dual-channel data sampling;
9. It has the function of virtual oscilloscope, and can analyze the spectrum and distortion of the waveform.
3. Demonstration experimental content
1) Strain gauge performance - single-arm bridge.
2) Strain gauges: single-arm, half-bridge, full-bridge comparison.
3) The temperature of the strain gauge will be compensated accordingly.
4) The principle and phenomenon of thermocouples.
5) Phase shifter experiments.
6) Phase-sensitive geophone experiments.
7) Strain gauge - AC full bridge.
8) Application of AC full bridge - amplitude measurement.
9) The application of the flow full bridge - one of the electronic scales.
10) The performance of differential transformers (mutual inductance).
11) Differential transformer (mutual inductance) zero residual voltage compensation experiment.
12) Calibration of differential transformer (mutual inductance).
13) Application of differential transformer (mutual inductance) - vibration measurement.
14) The application of differential transformer (mutual inductance) - the second electronic scale.
15) Static displacement performance of differential solenoid (self-inductive) sensors.
16) Dynamic displacement performance of differential solenoid (self-inductive) sensors.
17) Static calibration of eddy-current sensors.
18) The influence of the material of the body to be measured on the characteristics of the eddy current sensor.
19) Application of eddy current sensors – amplitude measurement.
20) Application of eddy current sensors - electronic scales third.
21) DC excitation static displacement characteristics of Hall sensors.
22) The application of Hall sensors - the fourth electronic scale.
23) Experiment on the static displacement characteristics of AC excitation of Hall sensors.
24) Application of Hall Sensors – Amplitude Measurement.
25) Performance of magnetoelectric sensors.
26) Dynamic response experiments of piezoelectric sensors.
27) The influence of piezoelectric sensor lead capacitance on voltage amplifier and charge amplifier.
28) Static and dynamic characteristics of differential area capacitive sensors.
29) Dynamic characteristics of double parallel beams - sinusoidal steady state influence.
30) Experiments on diffusion silicon piezoresistive pressure sensors.
31) Optical fiber displacement sensor experiment.
32) Temperature measurement experiment of PN junction temperature sensor.
33) Thermistor temperature measurement demonstration experiment.
34) Gas sensor experiments.
35) Hygroresistor (RH) experiment.
36) Photoelectric sensor (reflective type) speed measurement experiment.
37) Data acquisition system experiment - static collection example.
38) Data acquisition system experiment - dynamic acquisition example.