Sensor remote experiment system

Abstract

The utility model discloses a sensor remote experiment system which comprises a sensor remote experiment module. The sensor remote experiment module comprises a cabinet, a signal processing unit, a strain unit, a display unit, an AD converter, a processor, a computer, a camera and an illumination unit. The signal processing unit, the strain unit, the display unit, the AD converter, the processor, the camera and the lighting unit are located in the case; the processor is connected with the signal processing unit, the strain unit, the display unit and the AD converter, and is connected with the computer through a communication interface; and the strain unit is connected with the signal processing unit. According to the system, a user does not need to operate on site, the time of equipment preparation and independent wiring is saved, the utilization efficiency of a laboratory and experimental equipment is improved, the user can share experimental resources through a network in a remote experiment, the experimental cost is reduced, the user can file experimental videos by himself, a more convenient experimental recording mode is provided, and the user experience is improved. And the user can conveniently carry out redisk on the experiment.

Description

Technical Field

[0001] The utility model relates to the field of remote experiments of sensor systems, in particular to a remote experiment system of sensors. Background Art

[0002] Student experiments are a very important part of higher education. They can provide practical opportunities, improve students' thinking ability, and stimulate interest and innovation. At present, student experiments are mainly conducted offline. Although this is a traditional teaching method, it also has some shortcomings and disadvantages:

[0003] Offline laboratory resources are limited and cannot meet the needs of a large number of students. Students may need to wait in line and use limited instruments and equipment together, resulting in wasted experimental time. The laboratory space is limited and cannot accommodate a large number of students to conduct experiments at the same time. This may prevent students from participating in experiments in person, reducing students' practical opportunities. Offline laboratories usually have fixed opening hours or require advance reservations. Students need to conduct experiments at the specified time, which limits the efficiency of laboratory use. Such a time arrangement may not be flexible enough for students to conduct experiments according to their own learning progress and interests. Offline experiments require going to the laboratory or conducting experiments on site, which increases the user's transportation and time costs. Offline experiments require various operations, including instrument connection, experimental preparation, experimental process recording, etc., which limits the efficiency of the experiment. During offline experiments, students are prone to wiring errors, which may cause loss and damage to experimental instruments and increase the cost of repair and replacement.

[0004] Based on the above situation, the utility model proposes a sensor remote experiment system to effectively solve the above problems. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model provides a sensor remote experiment system.

[0006] The utility model adopts the following technical solutions:

[0007] A sensor remote experiment system, the sensor remote experiment module includes a chassis, a signal processing unit, a strain unit, a display unit, an AD converter, a processor, a computer, a camera, and a lighting unit; the signal processing unit, the strain unit, the display unit, the AD converter, the processor, the camera, and the lighting unit are located in the chassis; the processor is connected to the signal processing unit, the strain unit, the display unit, and the AD converter, and is connected to the computer through a communication interface; the strain unit is connected to the signal processing unit; the signal processing unit is connected to the AD converter; the camera is connected to the computer and is located above the signal processing unit, the strain unit, and the display unit, and the camera is used to shoot the signal processing unit, the strain unit, and the display unit and upload real-time video data to the computer; the lighting unit is located above the signal processing unit, the strain unit, and the display unit.

[0008] Furthermore, the signal processing unit includes a bridge, an amplifier, and an analog matrix switch; the bridge and the amplifier include wiring points, fixed-value resistors, strain resistors, digital potentiometers, and operational amplifiers; the digital potentiometer is connected to a processor, and its resistance value is controlled by the processor; the wiring points and all the pins of the electronic components in the bridge and the amplifier are connected to the analog matrix switch, and the analog matrix switch is controlled by the processor to determine the connection method between the wiring points and the fixed-value resistors, strain resistors, digital potentiometers, and operational amplifiers.

[0009] Furthermore, the strain unit includes a strain beam and a linear motor; one end of the strain beam is fixed to the base plate through a base, and the other end is located below the motor; the strain resistors are respectively fixed on the upper and lower sides of the strain beam, and all pins of the strain resistors are connected to the analog matrix switch in the signal processing unit; the linear motor is controlled by a processor and is located above one end of the strain beam, and the linear motor can adjust the distance of pressing down one end of the strain beam according to the numerical value input by the user.

[0010] The utility model provides a sensor remote experiment system: Compared with the existing offline experiment method, the remote experiment allows users to operate without on-site operation, saving time for equipment preparation and self-wiring. Users can arrange experiments according to their own time and place, which greatly improves the convenience and flexibility of the experiment and improves the utilization efficiency of laboratories and experimental equipment. The wiring software can help students check wiring errors, reduce the loss and damage of experimental equipment, and reduce the cost of maintenance and replacement of experimental equipment. Remote experiments allow users to share experimental resources through the network, reducing the cost of experiments. Users can archive experimental videos by themselves, providing a more convenient way to record experiments, which is convenient for users to review experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a block diagram of the sensor remote experiment system of the utility model;

[0012] Figure 2 This is a structural diagram of the sensor remote experiment system of the utility model;

[0013] Figure 3 It is a schematic diagram of the bridge circuit of the utility model;

[0014] Figure 4 This is a schematic diagram of the amplifier circuit of the utility model;

[0015] Figure 5 This is a schematic diagram of the analog matrix switch circuit of the utility model;

[0016] Figure 6 It is a schematic diagram of the processor circuit of the utility model;

[0017] Figure 7 It is a schematic diagram of the power supply circuit of the utility model.

[0018] The serial numbers marked in the figure are respectively: 1-signal processing unit, 2-AD converter and processor, 3-display unit, 4-strain resistor, 5-strain beam, 6-linear motor, 7-illumination unit, 8-camera, 9-computer. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Refer to the attached Figure 1-7 :

[0021] Refer to the attached Figure 1 The sensor remote experiment module includes a chassis, a signal processing unit, a strain unit, a display unit, an AD converter, a processor, a computer, a camera, and a lighting unit; the signal processing unit, the strain unit, the display unit, the AD converter, the processor, the camera, and the lighting unit are located in the chassis; the processor model is STM32, which is the main controller of the sensor remote experiment module, connected to the signal processing unit, the strain unit, the display unit, and the AD converter, and connected to the computer through a communication interface; the strain unit is connected to the signal processing unit; the signal processing unit is connected to the AD; the camera is connected to the computer and is located above the signal processing unit, the strain unit, and the display unit, and the camera is used to shoot the signal processing unit, the strain unit, and the display unit and upload real-time video data to the computer; the lighting unit is located above the signal processing unit, the strain unit, and the display unit.

[0022] The signal processing unit includes a bridge, an amplifier, and an analog matrix switch; the bridge and the amplifier are composed of wiring points, fixed-value resistors, strain resistors, digital potentiometers, and operational amplifiers; the digital potentiometer is connected to a processor, and its resistance value is controlled by the processor; the wiring points and all the pins of electronic components in the bridge and the amplifier are connected to the analog matrix switch, and the analog matrix switch is controlled by the processor to determine the connection method between the wiring points and the fixed-value resistors, strain resistors, digital potentiometers, and operational amplifiers.

[0023] The multiple connection points provided in the signal processing unit are used to connect pins of different electronic components.

[0024] The schematic diagram of the bridge circuit, the schematic diagram of the amplifier circuit, the schematic diagram of the analog matrix switch circuit, the schematic diagram of the processor circuit, and the schematic diagram of the power supply circuit are shown in the figure below. Figure 3-7 shown.

[0025] There are 4 wiring points (bridges): J, K, L, and M;

[0026] There are 4 strain resistors in total: Y1, Y2, Y3, and Y4; the two pins of each strain resistor correspond to Y1A, Y1B, Y2A, Y2B, Y3A, Y3B, Y4A, and Y4B respectively;

[0027] There are three fixed value resistors (bridges): B2, B3, and B4; the two pins of each fixed value resistor correspond to B2A, B2B, B3A, B3B, B4A, and B4B respectively;

[0028] The digital potentiometer (bridge) has a total of 1: W1; the three pins of the digital potentiometer are W1A, W1B, and W1C; W1A and W1B are connected to the positive and negative poles of the power supply;

[0029] There are 4 connection points (amplifiers): V1, V2, V+, and V-; V+ is connected to the V+ pin of the operational amplifier, and V- is connected to the V- pin of the operational amplifier;

[0030] There are two fixed value resistors (amplifiers): R1 and R3; the two pins of each fixed value resistor correspond to R1A, R1B, R3A, and R3B respectively;

[0031] There are two digital potentiometers (amplifiers): R2 and R4; the two pins of each digital potentiometer correspond to R2A, R2B, R4A, and R4B respectively; R4B is grounded;

[0032] The digital potentiometer pin R2B and the output end of the operational amplifier are connected to the AD converter;

[0033] The following provides a wiring point and a line connection method between a fixed resistor, a strain resistor, a digital potentiometer, an operational amplifier and an analog matrix switch, as shown in Table 1 and Table 2:

[0034]

[0035]

[0036] Table 1

[0037]

[0038] Table 2

[0039] The analog matrix switch model is CH446Q, which is an 8*16 analog switch with 128 built-in independent analog switches distributed at each intersection of the 8*16 matrix consisting of 16 X ports and 8 Y ports, so that any X port and any Y port can be connected or disconnected when needed.

[0040] The 8 Y ports of the first analog matrix switch U1 are respectively connected to the wiring points J, K, L, M, V1, V2, V+, and V-, and the 14 X ports are respectively connected to the strain resistor pins Y1A, Y1B, Y2A, Y2B, Y3A, Y3B, Y4A, and Y4B, and the fixed resistor pins B2A, B2B, B3A, B3B, B4A, and B4B;

[0041] The eight Y ports of the second analog matrix switch U2 are respectively connected to the wiring points J, K, L, M, V1, V2, V+, and V-, and the 11 X ports are respectively connected to the digital potentiometer pins W1A, W1B, W1C, R2A, R2B, R4A, R4B and the fixed resistor pins R1A, R1B, R3A, and R3B.

[0042] The strain unit includes a strain beam and a linear motor; one end of the strain beam is fixed to the base plate through a base, and the other end is located below the motor; the strain resistors are respectively fixed on the upper and lower sides of the strain beam, and all pins of the strain resistors are connected to the analog matrix switch in the signal processing unit; the linear motor is controlled by a processor and is located above one end of the strain beam. The linear motor can adjust the distance of pressing down one end of the strain beam according to the numerical value input by the user.

[0043] The AD converter is ADS8685, which is controlled by a processor, samples the output voltage of the signal processing unit, and displays it on a display unit. The display unit is a liquid crystal display, and its model is LCD1602.

[0044] The method for using the sensor remote experiment module is characterized by comprising the following steps:

[0045] Step 1. Connect your computer to the Internet;

[0046] Step 2. Remotely connect to the computer;

[0047] Step 3. The camera acquires video images and uploads real-time video to the computer;

[0048] Step 4. Determine the wiring method of the bridge circuit and the amplifier circuit, fill in the wiring table or upload the wiring table remotely;

[0049] Step 5. Obtain real-time video images by remotely connecting to a computer and observing the data displayed on the display unit;

[0050] Step 6. Input the motor pressing distance, observe and record the value on the display unit;

[0051] Step 7. Repeat steps 4-6 to complete the experiment.

[0052] In step 4, checking a cell in the wiring table indicates that the two pins corresponding to the cell are turned on; the user can check any two pins or multiple groups of pins in the wiring table to turn on each other, and the computer will convert the data into corresponding values ​​after identification by the program, and send the data to the processor through the serial interface. After receiving the data, the processor will send the data to the analog matrix switch through the SPI protocol, and the analog matrix switch will turn on the two corresponding pins or multiple groups of pins.

[0053] The following provides a communication format, as shown in Table 3 and Table 4:

[0054]

[0055] Table 3

[0056]

[0057] Table 4

[0058] Each communication bit consists of two hexadecimal bytes. The first byte represents a block of analog matrix switches, such as 01 represents the first block of analog matrix switches, and 02 represents the second block of analog matrix switches. The second byte represents the analog switch at the intersection of a certain X port and a certain Y port, such as 00 represents the analog switch at the intersection of the 0th X port and the 0th Y port. Therefore, 0100 represents the analog switch at the intersection of the 0th X port and the 0th Y port of the first block of analog matrix switches, that is, the analog switch between the Y1A pin and the J wiring port.

[0059] The lighting unit is an LED lighting unit, which is located above the signal processing unit, the strain unit and the display unit, and can illuminate the signal processing unit, the strain unit and the display unit to ensure that the real-time image of the camera is clearly visible.

[0060] This system can realize but is not limited to the following experiments, as follows:

[0061] Experiment 1

[0062] Experiment name: Strain resistor single arm characteristic experiment

[0063] The operation process is as follows:

[0064] Step 1. Connect your computer to the Internet;

[0065] Step 2. Remotely connect to the computer;

[0066] Step 3. The camera acquires video images and uploads real-time video to the computer;

[0067] Step 4. Determine the wiring method of the bridge circuit and the amplifier circuit, fill in the wiring table or upload the wiring table remotely;

[0068] Step 5. Obtain real-time video images by remotely connecting to a computer and observing the data displayed on the display unit;

[0069] Step 6. Complete zero adjustment by adjusting the resistance value of the digital potentiometer;

[0070] Step 7. Input the motor pressing distance, observe and record the value on the display unit;

[0071] Step 8. Repeat step 7 to complete the experiment.

[0072] The following is an example of a wiring diagram, as shown in Table 5 and Table 6:

[0073]

[0074] Table 5

[0075]

[0076] Table 6

[0077] The communication commands corresponding to this table are: 0110 0101 0118 0129 012A 013B 013C 010D 02000221 02320263 0244 0245 0277 0258 0259.

[0078] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A sensor remote experiment system, characterized in that: It includes a sensor remote experiment module, which includes a chassis, a signal processing unit, a strain unit, a display unit, an AD converter, a processor, a computer, a camera, and a lighting unit; the signal processing unit, the strain unit, the display unit, the AD converter, the processor, the camera, and the lighting unit are located in the chassis; the processor is connected to the signal processing unit, the strain unit, the display unit, and the AD converter, and is connected to the computer through a communication interface; the strain unit is connected to the signal processing unit; the signal processing unit is connected to the AD converter; the camera is connected to the computer and is located above the signal processing unit, the strain unit, and the display unit, and the camera is used to shoot the signal processing unit, the strain unit, and the display unit and upload real-time video data to the computer; the lighting unit is located above the signal processing unit, the strain unit, and the display unit.

2. A sensor remote experiment system according to claim 1, characterized in that: The signal processing unit includes a bridge, an amplifier, and an analog matrix switch; the bridge and the amplifier include wiring points, fixed-value resistors, strain resistors, digital potentiometers, and operational amplifiers; the digital potentiometer is connected to a processor, and its resistance value is controlled by the processor; the wiring points, the bridge, and all the pins of the electronic components in the amplifier are connected to the analog matrix switch, and the analog matrix switch is controlled by the processor to determine the connection method between the wiring points and the fixed-value resistors, strain resistors, digital potentiometers, and operational amplifiers.

3. A sensor remote experiment system according to claim 1, characterized in that: The strain unit includes a strain beam and a linear motor; one end of the strain beam is fixed to the base plate through a base, and the other end is located below the motor; the strain resistors are respectively fixed on the upper and lower sides of the strain beam, and all the pins of the strain resistors are connected to the analog matrix switch in the signal processing unit; the linear motor is controlled by a processor and is located above one end of the strain beam. The linear motor can adjust the distance of pressing down one end of the strain beam according to the numerical value input by the user.

4. A sensor remote experiment system according to claim 1, characterized in that: The AD converter is controlled by the processor, samples the output voltage of the signal processing unit, and displays it on the display unit.

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