CN206756727U - A kind of Seebeck coefficient testing devices - Google Patents

Abstract

The utility model relates to a Seebeck coefficient testing device, which comprises a control module, a heating module and a data acquisition module; the control module controls the work of the heating module, and the heating module is connected with the data acquisition module; the control The module includes two thyristor voltage regulators, a delay relay, a single-pole double-throw switch and a main switch; one end of the two thyristor voltage regulators is connected to the neutral line, the other end is connected to the live wire, and the two The control ends of the thyristor voltage regulators are all connected to the neutral line through the single-pole double-throw switch; the control end of one of the thyristor voltage regulators is located between the single-pole double-throw switch and the neutral line The time-delay relay is also connected; the main switch responsible for the overall power supply of the control module is also arranged on the neutral line. The utility model has the advantages of simple structure, accurate testing, convenient use, wide measuring range and wide application in the field of semiconductor testing.

Description

A Seebeck coefficient testing device

technical field

The utility model relates to a semiconductor testing device, in particular to a Seebeck coefficient testing device for heating samples and measuring temperature.

Background technique

The Seebeck coefficient is an important parameter of the thermoelectric performance of the reaction material, and the rapid and accurate measurement of the Seebeck coefficient is of great significance for evaluating the thermoelectric performance of the material. At present, the methods of measuring Seebeck coefficient mainly include static method and dynamic method. Among them, the technology using the static method is quite mature, but the process is relatively cumbersome; the technical process using the dynamic method is relatively simple, but it requires proper configuration to achieve the ideal test accuracy. For the dynamic method, in order to obtain high test accuracy, the following points need to be done: 1. The voltage and temperature signals must be measured at the same position and at the same time; 2. The temperature and voltage measurement probes must be in good contact with the sample surface. 3. The response time of the thermocouple must be short enough to accurately measure the temperature in dynamic changes; 4. It can collect temperature and voltage signals with high precision and quickly. Therefore, there is an urgent need to provide a new device to realize dynamic testing with higher testing accuracy.

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a Seebeck coefficient testing device, which is simple in structure, accurate in testing, easy to use, and can provide a wider measurement range.

To achieve the above object, the utility model takes the following technical solutions: a Seebeck coefficient testing device, characterized in that: it includes a control module, a heating module and a data acquisition module; the control module controls the work of the heating module, and the The heating module is connected with the data acquisition module; the control module includes two thyristor voltage regulators, a delay relay, a single-pole double-throw switch and a main switch; one end of the two thyristor voltage regulators is connected to the neutral line, and the other end is connected to the live line, and the control terminals of the two thyristor voltage regulators are connected to the neutral line through the single-pole double-throw switch; located at the control end of one of the thyristor voltage regulators The time delay relay is also connected between the single pole double throw switch and the neutral line; the main switch responsible for on-off of the overall power supply of the control module is also arranged on the neutral line.

The heating module includes a ceramic base, two high-power heating tubes and two copper heat-conducting sheets; samples are placed on the ceramic base, and the two high-power heating tubes are respectively located at both ends of the sample on the ceramic base , and each of the high-power heating tubes is provided with a copper heat-conducting sheet.

Each of the high-power heating tubes is connected to a control terminal of the thyristor voltage regulator, and is located between the single-pole double-throw switch and the neutral line; and one of the high-power heating tubes is connected to the extension The relays are connected in parallel.

The ceramic base is arranged in the basswood layer shell, and an asbestos insulation layer is pasted between the ceramic base and the basswood layer shell.

The data acquisition module includes two thermocouples, a multimeter and a computer; one end of the two thermocouples is respectively in contact with the two ends of the sample, and the other end of the two thermocouples is connected with the multimeter, and the collected The temperature and voltage signals are transmitted to the computer.

Because the utility model adopts the above technical scheme, it has the following advantages: 1. Since the utility model is composed of a control module, a heating module and a data acquisition module, it is convenient for assembly, disassembly, maintenance and repeated use. 2. The utility model adopts a thyristor voltage regulator and a time-delay relay, which can conveniently adjust the heating rate and temperature difference, and can carry out a wide measurement range. 3. The utility model is provided with a basswood layer shell outside the ceramic base, and an asbestos insulation layer is pasted between the ceramic base and the basswood layer shell, thereby effectively reducing heat loss and improving the accuracy of the test.

In summary, the utility model can be widely used in the field of semiconductor testing.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the structural representation of the control module of the utility model;

Fig. 3 is a side view of the basswood layer shell of the heating module of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in FIG. 1 , the utility model provides a Seebeck coefficient testing device based on a dynamic method for rapidly measuring the Seebeck coefficient of a sample, which includes a control module 1 , a heating module 2 and a data acquisition module 3 . The control module 1 controls the heating module 2 to work, and the heating module 2 is connected to the data acquisition module 3, and the data acquisition module 3 collects test data.

As shown in FIG. 2 , the control module 1 includes two thyristor voltage regulators 4 , a single-pole double-throw switch 5 , a delay relay 6 and a main switch 7 . One end of the two thyristor voltage regulators 4 is connected to the neutral line, and the other end is connected to the live line, and the control terminals of the two thyristor voltage regulators 4 are connected to the neutral line through the SPDT switch 5 . Located at the control end of one of the thyristor voltage regulators 4, a delay relay 6 is also connected between the SPDT switch 5 and the neutral line, and the delay relay 6 controls the thyristor voltage regulator 4 relative to the other Delayed turn-on time of SCR4. A main switch 7 is also arranged on the neutral line, and the main switch 7 is responsible for controlling the on-off of the overall power supply of the module.

The heating module 2 includes a ceramic base 8, two high-power heating tubes 9 and two copper heat conducting sheets. A sample is placed on the ceramic base 8 , and two high-power heating tubes 9 are respectively located at both ends of the sample on the ceramic base 8 , and a red copper heat conducting sheet is arranged above each high-power heating tube 9 . Each high-power heating tube 9 is connected to a control terminal of a thyristor voltage regulator 4, and is located between the SPDT switch 5 and the neutral line, and the corresponding high-power heating tube 9 is controlled by the thyristor voltage regulator 1 The heating voltage; and one of the high-power heating tubes 9 is connected in parallel with the delay relay 6, and the circuit where the high-power heating tube 9 is located is connected through the delay relay 6.

In the above embodiment, as shown in FIG. 3 , the ceramic base 8 is set in the basswood layer shell 10 , and an asbestos insulation layer is pasted between the ceramic base 8 and the basswood layer shell 10 .

The data acquisition module 3 includes two thermocouples, a multimeter and a computer. One end of the two thermocouples is in contact with both ends of the sample, and the other end of the two thermocouples is connected to a multimeter, and the collected temperature and voltage signals are transmitted to the computer, which records in real time and completes the Seebeck coefficient test of the sample.

In summary, when the utility model is in use, first close the main switch 7, adjust the output voltage of the thyristor voltage regulator 4 and the delay time of the delay relay 6; then close the SPDT switch 5, a high The power heating tube 9 starts heating immediately, and after reaching the set time, another high-power heating tube 9 also starts heating.

The above-mentioned embodiments are only used to illustrate the utility model, and the connection and structure of each component can be changed. Improvements and equivalent transformations should not be excluded from the protection scope of the present utility model.

Claims (5)

1. A kind of 1. Seebeck coefficient testing devices, it is characterised in that：It includes control module, heating module and data acquisition module Block；The control module controls the heating module work, and the heating module is connected with the data acquisition module；

   The control module includes two controllable silicon pressure regulators, a time-delay relay, a single-pole double-throw switch (SPDT) and a master switch；Two institutes State thyristor regulating depressor one end and be connected to zero line, the other end is connected to live wire, and the control of the two thyristor regulating depressors End is all connected to zero line through the single-pole double-throw switch (SPDT)；A thyristor regulating depressor control terminal is located therein, in the hilted broadsword The time-delay relay is also associated between commutator and zero line；It is whole that the responsible control module is additionally provided with zero line The master switch of body on/off.
2. A kind of 2. Seebeck coefficient testing devices as claimed in claim 1, it is characterised in that：The heating module includes one Individual ceramic base, two high power heating tubes and two red copper thermally conductive sheets；Sample is placed with the ceramic base, described in two High power heating tube is respectively positioned at the both ends of sample on the ceramic base, and set above each high power heating tube There is a red copper thermally conductive sheet.
3. A kind of 3. Seebeck coefficient testing devices as claimed in claim 2, it is characterised in that：Each high power heating Pipe is connected to a thyristor regulating depressor control terminal, and between the single-pole double-throw switch (SPDT) and zero line；And wherein One high power heating tube is in parallel with the time-delay relay.
4. A kind of 4. Seebeck coefficient testing devices as described in any one of Claims 2 or 3, it is characterised in that：The ceramic bottom Seat is arranged in linden layer shell, and being sticked between the ceramic base and the linden layer shell has asbestos heat-insulation layer.
5. A kind of 5. Seebeck coefficient testing devices as claimed in claim 2 or claim 3, it is characterised in that：The data acquisition module Including two thermocouples, a universal meter and computer；Two described thermocouple one end respectively with the end in contact of sample two, two institutes The other end for stating thermocouple is all connected with the universal meter, and the temperature collected and voltage signal are transmitted to the computer.