CN111537824A - An invasive heater performance testing system - Google Patents

Abstract

The invention discloses an intrusive heater performance testing system, comprising a temperature sensor, a current sensor and a data processing unit. The temperature sensor is arranged around the intrusive heater, the current sensor is used to measure the loop current of the intrusive heater, and the temperature sensor It is electrically connected with the current sensor and the data processing unit, and is used for feeding back the detected temperature signal and the loop current signal of the invasive heater to the data processing unit, and the data processing unit is used for comparing the temperature signal and the loop current signal to judge the invasive heating protection performance of the device. The invention can improve product testing accuracy, and can perform performance testing on invasive heaters with different powers; simultaneously perform performance testing on multiple groups of invasive heaters, thereby improving product testing efficiency; and can effectively avoid product damage during testing; The experimental data can be directly recorded and observed through the display module.

Description

An invasive heater performance testing system

technical field

The invention belongs to the technical field of power product testing, and in particular relates to an intrusive heater performance testing system.

Background technique

In some special working conditions such as wind power, an intrusive heater needs to be used. The heater contains a temperature control loop (thermostat) inside. When heated to a certain temperature, it deforms and disconnects the circuit; when the temperature decreases When it reaches a certain temperature, it resumes the deformation and the closed loop continues to heat. If there is a problem with the internal temperature control loop, the heater may continue to heat under high temperature conditions, or the heater will not heat under low temperature conditions, affecting the overall system performance. Therefore, when testing the heating performance of the intrusive heater, it is also necessary to perform a corresponding test on the thermostat to ensure reliable product performance. In ordinary tests, there are problems such as frequent replacement of test tooling, dry burning, etc. The specific ordinary debugging method has several shortcomings: low test accuracy, cumbersome building test tooling, and ordinary testing only judges its temperature control performance by the surface temperature of the heater , the test accuracy is low, and different test fixtures need to be built according to the invasive heaters of different powers to meet the requirements of parameters such as current; the inspection and test efficiency is low, and the common method can only test one temperature controller at a time. The test efficiency is low when performing inspection tests; if the test is carried out at room temperature, there are conditions such as dry burning, which affects the service life of the device, etc.; it is inconvenient to view the test data. .

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides an invasive heater performance testing system.

An invasive heater performance testing system, comprising a temperature sensor, a current sensor and a data processing unit, wherein the temperature sensor is arranged around the invasive heater, the current sensor is used to measure the loop current of the invasive heater, The temperature sensor and the current sensor are electrically connected to the data processing unit for feeding back the detected temperature signal of the invasive heater and the loop current signal to the data processing unit, and the data processing unit It is used to compare the temperature signal and the loop current signal to judge the protection performance of the intrusive heater.

Preferably, the above technical solution further includes a power supply unit, the power supply unit includes a main power supply protection module, an intrusive heater power supply module and a data processing power supply module, and the AC power is protected by the main power supply protection module and branched into the An intrusive heater power supply module and a data processing power supply module, the intrusive heater power supply module includes a transfer terminal, and the transfer terminal is used to supply power to a plurality of intrusive heaters of the same power and/or different powers, so The data processing power supply module is used to step down the AC power supply and convert it into a DC power supply to supply power to the data processing unit.

Preferably, the main power supply protection module includes a fuse-type isolation switch F1, the AC power supply is electrically connected to the input end of the fuse-type isolation switch F1, and the output of the fuse-type isolation switch F1 The terminals are respectively electrically connected with the invasive heater power supply module and the data processing power supply module.

Preferably, the intrusive heater power supply module includes a circuit breaker F2, the input end of the circuit breaker F2 is electrically connected to the output end of the fuse disconnector F1, and the output end of the circuit breaker F2 It is electrically connected to the input ends of the transfer terminal XP1 and the transfer terminal XP2, and the output end of the transfer terminal XP1 is electrically connected to one end of the invasive heater after passing through the protection switch. The other end is electrically connected to the output end of the transfer terminal XP2 after passing through the current sensor.

Preferably, the data processing power supply module includes a circuit breaker F3, the input end of the circuit breaker F3 is electrically connected to the output end of the fuse-type isolation switch F1, and the output end of the circuit breaker F3 is connected to the switch The input end of the power supply E1 is electrically connected, the output end of the switching power supply E1 is electrically connected with the input end of the uninterruptible power supply E2, and the output end of the uninterruptible power supply E2 is electrically connected with the input ends of the terminal XP3 and the terminal XP4.

Preferably, the data processing unit includes a data processing module and a display module, the positive terminal of the power supply of the data processing module is electrically connected to the output terminal of the terminal XP3, and the negative terminal of the power supply of the data processing module is electrically connected to the output terminal of the terminal XP3. The output terminal of the terminal XP4 is electrically connected, the current signal feedback terminal of the data processing module is electrically connected to the current sensor, the temperature signal feedback terminal of the data processing module is electrically connected to the temperature sensor, and the data processing module is electrically connected to the temperature sensor. The current signal output terminal of the processing module is electrically connected to the current signal input terminal of the display module, the temperature signal output terminal of the data processing module is electrically connected to the temperature signal input terminal of the display module, and the power supply of the display module is positive The terminal is electrically connected to the output terminal of the terminal XP3, and the negative terminal of the power supply of the display module is electrically connected to the output terminal of the terminal XP4.

Preferably, in the above technical solution, the data processing module selects a CX5130 controller.

Preferably, in the above technical solution, the heat dissipation medium of the invasive heater is water.

The advantages and positive effects of the present invention are as follows: the present invention provides an intrusive heater performance testing system, which can detect the heater temperature and loop current by setting a temperature sensor and a current sensor, and can judge the temperature of the thermostat by detecting the loop current. By comparing the loop current with the temperature detected by the thermocouple at this time, the protection performance of the invasive heater can be judged, thereby improving the measurement accuracy of the test system; Cable transfer can test invasive heaters of different powers; through the power supply unit and data processing unit, multiple groups of invasive heaters can be tested for working status and temperature at the same time; water is used as the invasive heater The heat dissipation medium can avoid dry burning of the heater and reduce the impact on its service life; by setting the display module, the data can be displayed, the test data can be directly observed, and the overall test efficiency can be improved.

Description of drawings

1 is a circuit schematic diagram of a total power supply protection module provided by an embodiment of the present invention;

2 is a schematic circuit diagram of an intrusive heater power supply module provided by an embodiment of the present invention;

3 is a schematic circuit diagram of a data processing power supply module provided by an embodiment of the present invention;

FIG. 4 is a schematic circuit diagram of a data processing unit provided by an embodiment of the present invention.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

This embodiment provides an invasive heater performance testing system, as shown in Figures 1-4, including a temperature sensor, a current sensor and a data processing unit, the temperature sensor is arranged around the invasive heater, and the temperature sensor can Detect the temperature of the invasive heater, the current sensor is used to measure the loop current of the invasive heater, when the invasive heater is working normally and the thermostat is closed, the invasive heater has a loop current, and the current sensor can Feedback the normal current signal; when the temperature protection point is reached, the thermostat is disconnected, at this time, the invasive heater has no loop current, and the current sensor has no corresponding signal feedback, so that the switching state of the thermostat can be judged; the temperature sensor and a current sensor is electrically connected to the data processing unit for feeding back the detected temperature signal of the invasive heater and the loop current signal to the data processing unit, and the data processing unit is used for The temperature signal and the loop current signal are compared to judge the protection performance status of the intrusive heater. In this embodiment, the temperature sensor adopts a thermocouple temperature sensor. Fix the thermocouple temperature sensor near the intrusive heater, and use the current sensor to measure the loop current of the thermostat to judge the switching state of the thermostat, and compare the loop current with the temperature detected by the thermocouple temperature sensor at this time. By comparison, we can judge the protection performance of the invasive heater and improve its measurement accuracy.

Further, it also includes a power supply unit, the power supply unit includes a main power supply protection module, an intrusive heater power supply module and a data processing power supply module, and the AC power is branched into the intrusive heating after being protected by the main power supply protection module. A heater power supply module and a data processing power supply module, the invasive heater power supply module includes an adapter terminal, and the adapter terminal is used to supply power to a plurality of invasive heaters of the same power and/or different powers. The invasive heater uses different wires and different currents. In this embodiment, the transfer terminal is used to transfer cables with different wire diameters, and related tests can be performed on the invasive heater with different powers. The data processing power supply module is used to power down the AC power supply and convert it into a DC power supply to supply power to the data processing unit.

Specifically, as shown in FIG. 1 , the general power supply protection module includes a fuse-type isolation switch F1, the AC power supply is electrically connected to the input end of the fuse-type isolation switch F1, and the fuse-type isolation switch The output ends of F1 are respectively electrically connected to the intrusive heater power supply module and the data processing power supply module. In this embodiment, the 230V AC power supply is connected to the fuse-type isolation switch F1, and the fuse-type isolation switch F1 can control and protect the back-end power supply line, and distribute the power to the intrusive heater power supply module and the data processing power supply module.

Specifically, as shown in FIG. 2 , the intrusive heater power supply module includes a circuit breaker F2, the input end of the circuit breaker F2 is electrically connected to the output end of the fuse disconnector F1, and the circuit breaker F2 The output end is electrically connected with the input ends of the transfer terminal XP1 and the transfer terminal XP2, and the output end of the transfer terminal XP1 is electrically connected to one end of the intrusive heater after passing through the protection switch. The other end of the heater is electrically connected to the output end of the transfer terminal XP2 after passing through the current sensor. The circuit breaker F2 is the main switch of the intrusive heater power supply module, which controls and protects the back-end load circuit. XP1 and XP2 are the transfer terminals of the 230V power supply, which are used to supply power to the intrusive heater; R1, R2...RX are the Intrusive heaters, protection switches (circuit breakers) F10, F11...FX control and protect R1 and other intrusive heaters; V1, V2...VX are current sensors, used to detect the loop current of the heater, to judge the status of the thermostat.

Specifically, as shown in FIG. 3 , the data processing power supply module includes a circuit breaker F3, the input end of the circuit breaker F3 is electrically connected to the output end of the fuse-type isolation switch F1, and the output end of the circuit breaker F3 is electrically connected The terminal is electrically connected to the input terminal of the switching power supply E1, the output terminal of the switching power supply E1 is electrically connected to the input terminal of the uninterruptible power supply E2, and the output terminal of the uninterruptible power supply E2 is connected to the input terminal of the terminal XP3 and the terminal XP4. electrical connection. The circuit breaker F3 is the protection switch of the data processing power supply module, and E1 is the switching power supply, which is used to convert the 230V AC power into 24V DC power, provide 24V DC power supply for the data processing unit, and make a certain redundancy for the number of 24V DC power interfaces. It can provide power supply for other 24V DC equipment during the test; E2 is a UPS uninterruptible power supply, which can provide stable 24V DC power supply for back-end equipment; E3 is a 12Ah battery, which can be used for power supply when the system is powered off abnormally. The back-end data processing module provides corresponding power supply to ensure the normal storage and transmission of data; XP3: 1~X+1 are 24V terminals, XP4: 1~X+1 are 0V terminals, providing 24V DC power for the data processing unit powered by.

Specifically, as shown in FIG. 4 , the data processing unit includes a data processing module and a display module. The positive terminal of the power supply of the data processing module is electrically connected to the output terminal of the connection terminal XP3, and the power supply of the data processing module is electrically connected. The negative terminal is electrically connected to the output terminal of the terminal XP4, the current signal feedback terminal of the data processing module is electrically connected to the current sensor, and the temperature signal feedback terminal of the data processing module is electrically connected to the temperature sensor, The current signal output terminal of the data processing module is electrically connected to the current signal input terminal of the display module, the temperature signal output terminal of the data processing module is electrically connected to the temperature signal input terminal of the display module, and the display module The positive terminal of the power supply is electrically connected to the output terminal of the terminal XP3, and the negative terminal of the power supply of the display module is electrically connected to the output terminal of the terminal XP4. In this embodiment, the display module U2 is a PC display, the data processing module U1 uses a CX5130 controller, X1: 1-1', 2-2'...XX' is the current signal feedback, when the invasive heater is working normally, Feedback the normal current signal; when the temperature protection point is reached, the thermostat is disconnected, and there is no corresponding signal feedback at this time; B1 is a thermocouple temperature sensor, which can monitor the temperature of the intrusive heater in real time; X2: 1-1', 2- 2'...X-X' is the temperature signal feedback, which can monitor the temperature of the intrusive heater in real time, which is convenient to compare with the current status signal to judge the temperature protection performance status of the intrusive heater.

In this embodiment, the power distribution of the power supply unit and the use of the CX5130 controller as the CPU of the data processing unit can simultaneously detect performance tests such as the working state and temperature of multiple groups of intrusive heaters. By using the CX5130 controller to process the data and display the data to the PC, the test data can be directly observed and the overall test efficiency can be improved.

Optionally, in order to avoid dry burning of the heater, the heat dissipation medium of the intrusive heater is water, so as to reduce the influence on the service life of the heater.

The working process of this embodiment is tested by taking the invasive heater R1 as an example:

Place the intrusive heater in the water tank, close the main power protection switch F1 and the intrusive heater power supply circuit protection switch F2, transfer the 230V AC terminals of terminals XP1 and XP2 to get power; close the 24V control circuit protection switch F3, data processing The power supply module is powered by 24V DC, and the data processing unit and other systems are powered on; the protection switch F10 is closed, and the invasive heater R1 is powered on and works. At this time, the current sensor V1 detects and feeds back the current to the data processing module U1, and the thermocouple temperature sensor B1 Real-time temperature measurement will be performed on the invasive heater R1 and the data will be fed back to the data processing module U1. The data processing module U1 will record and store the data and display it on the PC side. The heating performance is judged by observing the temperature value fed back by the thermocouple temperature sensor B1 when the heating temperature is observed; when it reaches its thermostat operating point, the thermostat deforms and cuts off the circuit, and the current sensor V1 has no corresponding current data feedback. At this time, through the current temperature Compare with the temperature protection range of the invasive heater to judge whether its temperature protection performance meets the requirements.

The advantages and positive effects of the present invention are as follows: the present invention provides an intrusive heater performance testing system, which can detect the heater temperature and loop current by setting a temperature sensor and a current sensor, and can judge the temperature of the thermostat by detecting the loop current. By comparing the loop current with the temperature detected by the thermocouple at this time, the protection performance of the invasive heater can be judged, thereby improving the measurement accuracy of the test system; Cable transfer can test invasive heaters of different powers; through the power supply unit and data processing unit, multiple groups of invasive heaters can be tested for working status and temperature at the same time; water is used as the invasive heater The heat dissipation medium can avoid dry burning of the heater and reduce the impact on its service life; by setting the display module, the data can be displayed, the test data can be directly observed, and the overall test efficiency can be improved.

An embodiment of the present invention has been described in detail above, but the content is only a preferred embodiment of the present invention, and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still belong to the scope of the patent of the present invention.

Claims (8)

1. An intrusive heater performance test system, comprising: including temperature sensor, current sensor and data processing unit, temperature sensor locates the invasive heater peripherally, current sensor is used for measuring the loop current of invasive heater, temperature sensor and current sensor with the data processing unit electricity is connected, is used for detecting the temperature signal of invasive heater with loop current signal feeds back to the data processing unit, the data processing unit be used for with temperature signal and loop current signal contrast judgement the protection performance of invasive heater.

2. The intrusive heater performance test system of claim 1, wherein: still include the electrical unit, the electrical unit includes total power supply power protection module, invasive heater power module and data processing power module, and alternating current power passes through branch does after total power supply power protection module protection invasive heater power module and data processing power module, invasive heater power module includes the switching terminal, the switching terminal is used for supplying power to a plurality of with power and/or different power's invasive heater, data processing power module is used for with alternating current power supply step-down and convert to direct current power after the data processing unit power supply.

3. The intrusive heater performance test system of claim 2, wherein: the total power supply protection module comprises a fuse type isolating switch F1, the alternating current power supply is electrically connected with the input end of the fuse type isolating switch F1, and the output end of the fuse type isolating switch F1 is respectively electrically connected with the intrusive heater power supply module and the data processing power supply module.

4. The intrusive heater performance test system of claim 3, wherein: the intrusive heater power supply module comprises a circuit breaker F2, the input end of the circuit breaker F2 is electrically connected with the output end of the fuse type isolating switch F1, the output end of the circuit breaker F2 is electrically connected with the input ends of the adapter terminal XP1 and the adapter terminal XP2, the output end of the adapter terminal XP1 is electrically connected with one end of the intrusive heater after passing through a protection switch, and the other end of the intrusive heater is electrically connected with the output end of the adapter terminal XP2 after passing through a current sensor.

5. The intrusive heater performance test system of claim 4, wherein: the data processing power supply module includes circuit breaker F3, circuit breaker F3's input with fuse formula isolator F1's output electricity is connected, circuit breaker F3's output is connected with switching power supply E1's input electricity, switching power supply E1's output is connected with uninterrupted power supply E2's input electricity, uninterrupted power supply E2's output is connected with binding post XP3 and binding post XP 4's input electricity.

6. The intrusive heater performance test system of claim 5, wherein: the data processing unit comprises a data processing module and a display module, the positive end of a power supply of the data processing module is electrically connected with the output end of the wiring terminal XP3, the negative power supply end of the data processing module is electrically connected with the output end of the wiring terminal XP4, the current signal feedback end of the data processing module is electrically connected with the current sensor, the temperature signal feedback end of the data processing module is electrically connected with the temperature sensor, the current signal output end of the data processing module is electrically connected with the current signal input end of the display module, the temperature signal output end of the data processing module is electrically connected with the temperature signal input end of the display module, the positive end of the power supply of the display module is electrically connected with the output end of the wiring terminal XP3, and the negative end of the power supply of the display module is electrically connected with the output end of the wiring terminal XP 4.

7. The intrusive heater performance test system of claim 6, wherein: the data processing module selects a CX5130 controller.

8. The intrusive heater performance test system of claim 1, wherein: the heat dissipation medium of the invasive heater is water.

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