阅读说明：本技术 一种温度显示仪 (Temperature display instrument ) 是由 林少伟 方梓轩 陈耿 郑云 龚传郧 蔡佳佳 王德中 连明畴 黄子建 蔡依麟 陈昊 于 2021-03-17 设计创作，主要内容包括：本发明实施例公开了一种温度显示仪,其中包括：温度采集部,用于采集待测分路开关的实时温度；控制部,用于获取温度采集部输出的实时温度,并与存储温度进行比较,若实时温度大于存储温度,则将存储温度更新为实时温度；显示部,用于显示存储温度。本发明实施例实现了记录并显示全天各时段中最高温度,不仅使得分路负荷检测可以全天不间断进行,而且人工现场收集数据的时间相比现有技术也更为灵活。因此提高了分路负荷检测结果的准确度,免除了检测人员到达现场的时间限制。(The embodiment of the invention discloses a temperature display instrument, which comprises: the temperature acquisition part is used for acquiring the real-time temperature of the shunt switch to be detected; the control part is used for acquiring the real-time temperature output by the temperature acquisition part, comparing the real-time temperature with the storage temperature, and updating the storage temperature to be the real-time temperature if the real-time temperature is greater than the storage temperature; and a display part for displaying the storage temperature. The embodiment of the invention realizes the recording and displaying of the highest temperature in each time period all day, not only ensures that the shunt load detection can be carried out all day without interruption, but also ensures that the time for collecting data on site manually is more flexible compared with the prior art. Therefore, the accuracy of the shunt load detection result is improved, and the time limit of the detection personnel arriving at the site is avoided.)

1. A temperature display apparatus, comprising:

the temperature acquisition part is used for acquiring the real-time temperature of the shunt switch to be detected;

the control part is used for acquiring the real-time temperature output by the temperature acquisition part, comparing the real-time temperature with a storage temperature, and updating the storage temperature to the real-time temperature if the real-time temperature is greater than the storage temperature;

and the display part is used for displaying the storage temperature.

2. The temperature display instrument according to claim 1, wherein the control unit comprises a digital-to-analog conversion module for performing analog-to-digital conversion on the acquired real-time temperature.

3. The temperature display instrument according to claim 1, wherein the control portion comprises a single chip microcomputer.

4. The temperature display instrument according to claim 1, wherein the control part further comprises a crystal oscillator, and two ends of the crystal oscillator are connected with crystal oscillator pins of the single chip microcomputer.

5. The temperature display instrument according to claim 1, further comprising a power supply module electrically connected to the control unit, the power supply module being configured to convert an external power supply voltage into a rated operating voltage.

6. The temperature display instrument according to claim 1, further comprising an indicator light connected to the control unit, the indicator light being configured to indicate an operating state when the temperature display instrument is powered on.

7. The temperature display instrument according to claim 1, wherein the control unit further comprises a diode, a negative electrode of the diode is connected to a reset terminal of the control unit, and a positive electrode of the diode is grounded.

8. The temperature display of claim 7, wherein the diode comprises a switching diode.

9. The temperature display instrument according to claim 1, wherein the control unit further comprises a resistor, a first end of the resistor is connected to a reset terminal of the control unit, and a second end of the resistor is grounded.

10. The temperature display instrument according to claim 1, wherein the control part further comprises a capacitor, a first end of the capacitor is connected with a reset end of the control part, and a second end of the capacitor is connected with a power supply.

Technical Field

The embodiment of the invention relates to the detection technology of power equipment, in particular to a temperature display instrument.

Background

With the economic development of China, the demand for electric power is higher and higher, and the load detection of the power grid becomes more and more important.

The existing shunt load detection is carried out by manually detecting shunt current on site. However, since the maximum electrical load generally occurs in the time periods of 13:00 to 14:30 at noon and 22:30 to 24:00 at night, the shunt load detection by means of manual current measurement has considerable difficulties.

Disclosure of Invention

The invention provides a temperature display instrument which is used for detecting the temperature of a shunt switch in real time, recording the highest temperature in the shunt switch and displaying the highest temperature through a display part.

The embodiment of the invention provides a temperature display instrument, which comprises: the temperature acquisition part is used for acquiring the real-time temperature of the shunt switch to be detected; the control part is used for acquiring the real-time temperature output by the temperature acquisition part, comparing the real-time temperature with the storage temperature, and updating the storage temperature to be the real-time temperature if the real-time temperature is greater than the storage temperature; and a display part for displaying the storage temperature.

Further, the control part comprises a digital-to-analog conversion module for performing analog-to-digital conversion on the acquired real-time temperature.

Further, the control part comprises a single chip microcomputer.

Further, the control part also comprises a crystal oscillator, and two ends of the crystal oscillator are connected with a crystal oscillator pin of the single chip microcomputer.

Further, the temperature display instrument further comprises a power supply module, the power supply module is electrically connected with the control part, and the power supply module is used for converting external power supply voltage into rated working voltage.

Furthermore, the temperature display instrument also comprises an indicator light, the indicator light is connected with the control part, and the indicator light is used for indicating the working state when the temperature display instrument is electrified.

Furthermore, the control part also comprises a diode, the cathode of the diode is connected with the reset end of the control part, and the anode of the diode is grounded.

Further, the diode includes a switching diode.

Furthermore, the control part also comprises a resistor, the first end of the resistor is connected with the reset end of the control part, and the second end of the resistor is grounded.

Furthermore, the control part also comprises a capacitor, the first end of the capacitor is connected with the reset end of the control part, and the second end of the capacitor is connected with the power supply.

In the embodiment of the invention, the real-time temperature of the shunt switch to be measured is acquired by the temperature acquisition part, the control part compares the real-time temperature output by the temperature acquisition part with the storage temperature, if the real-time temperature is greater than the storage temperature, the storage temperature is updated to be the real-time temperature, and the display part displays the storage temperature. The highest temperature in each time period of the whole day is recorded and displayed, so that the shunt load detection can be continuously carried out in the whole day, and the time for collecting data on the manual site is more flexible than that in the prior art. Therefore, the accuracy of the shunt load detection result is improved, and the time limit of the detection personnel arriving at the site is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a temperature display instrument according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of a temperature display device according to an embodiment of the present invention;

description of the drawings:

1-temperature acquisition part, 2-control part, 3-display part

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

An embodiment of the present invention provides a temperature display apparatus, fig. 1 is a schematic structural diagram of the temperature display apparatus provided in the embodiment of the present invention, and fig. 2 is a schematic circuit diagram of the temperature display apparatus provided in the embodiment of the present invention. Referring to fig. 1 and 2, there are included:

the temperature acquisition part 1 is used for acquiring the real-time temperature of the shunt switch to be measured;

the control part 2 is used for acquiring the real-time temperature output by the temperature acquisition part 1, comparing the real-time temperature with the storage temperature, and updating the storage temperature to the real-time temperature if the real-time temperature is greater than the storage temperature;

and a display unit 3 for displaying the storage temperature.

The temperature acquisition unit 1 may be any sensor module for acquiring temperature, and the embodiment of the present invention is not limited to a specific configuration or model. As shown in fig. 2, the communication terminal of the temperature collecting part 1 is connected to the 5 v power terminal through an R2 resistor and is connected to the T1 pin of the control part 2 to transmit the temperature signal. Illustratively, R2 may be set to 4.7K ohms. The control unit 2 may be any circuit capable of acquiring the real-time temperature output by the temperature acquisition unit 1, comparing the acquired real-time temperature with the stored temperature, updating the stored temperature to the real-time temperature if the real-time temperature is greater than the stored temperature, and outputting the stored temperature to the display unit 3. For example, the control part 2 may be a single chip, and the VCC pin of the control part 2 is connected to the VCC power supply terminal to supply power to the control part 2. The GND terminal of the control unit 2 is grounded. The display part 3 may be any device for displaying the storage temperature, and the embodiment of the present invention is not limited to a specific type or model thereof, and for example, a nixie tube or a dot matrix screen may be used as the display part 3. As shown in fig. 2, the nixie tube is connected to pins P12 and P13 of the control part 2 through a communication terminal to transmit the stored temperature data.

In other embodiments, the control part 2 includes a digital-to-analog conversion module for performing analog-to-digital conversion on the acquired real-time temperature.

The analog signal output by the temperature acquisition part 1 can be converted into a digital signal through the digital-to-analog conversion module, so that the control part 2 can perform further processing.

In other embodiments, the control part 2 further includes a crystal oscillator C1, and two ends of the crystal oscillator C1 are connected to crystal oscillator pins of the single chip microcomputer.

As shown in fig. 2, two ends of the crystal oscillator C1 are connected to the control unit 2 through pins X1 and X2 of the control unit 2, respectively, a first end of the crystal oscillator C1 is connected to one end of the capacitor C2, a second end of the crystal oscillator C1 is connected to one end of the capacitor C3, and the other ends of the capacitors C2 and C3 are both grounded. The crystal oscillator C1 can provide a clock signal for the control part 2, and the capacitors C2 and C3 can make the crystal oscillator C1 start oscillation better and make the oscillation frequency thereof more stable. Optionally, the crystal oscillator C1 is 6MHz, and the capacitors C2 and C3 are both 20 pF.

In other embodiments, a power module (not shown) is further included, and the power module is electrically connected to the control portion 2 and is configured to convert an external power supply voltage into a rated operating voltage.

The power module can convert the voltage provided by the external power supply into 5-volt or 3.3-volt direct-current voltage to supply power to the single chip microcomputer. The output terminals of the power module may include a VCC power terminal and a 5 volt power terminal, etc.

In other embodiments, the temperature display instrument further comprises an indicator light, the indicator light is connected with the control part 2, and the indicator light is used for indicating the working state when the temperature display instrument is powered on.

As shown in fig. 2, the indicator light may include a light emitting diode LED GREEN. The positive electrode of the resistor is connected to a VCC power supply terminal, and the negative electrode is connected to an input/output pin of the controller 2 through a protection resistor R3, for example, a P17 pin. The P17 pin of the control part 2 can be set to an open-drain output state, and when the control part 2 is powered on and works, the diode LED GREEN emits light. Where the protection resistor R3 may be 510 ohms.

In other embodiments, the control portion 2 further includes a reset capacitor, a first terminal of the reset capacitor is connected to the reset terminal of the control portion 2, and a second terminal of the reset capacitor is connected to the power supply.

As shown in fig. 2, the reset capacitor may be a capacitor with a positive electrode E1, a positive electrode E1 connected to the power supply, and a negative electrode E connected to the RST pin of the controller 2. During power-up, active capacitance E1 charges, and RST pin of control unit 2 is at a high level. As the charging is gradually completed, the level of the RST pin gradually becomes lower until the charging of the active capacitance E1 is completed, and the RST pin of the control section 2 becomes low. The control unit 2 thus obtains a reset signal that can reset the control unit 2. Optionally, the capacitance value of the active capacitance E1 is 22 μ F.

In other embodiments, the control portion 2 further includes a diode D1, a cathode of the diode D1 is connected to the reset terminal of the control portion 2, and an anode of the diode D1 is grounded.

As shown in fig. 2, when the external power supply is powered off, the charge in the active capacitance E1 needs to be discharged to be charged again, forming a reset signal. The addition of diode D1 allows the charge in the active capacitance E1 to be discharged quickly after the power supply is turned off. The time required by voltage reset at two ends of the active capacitor E1 is greatly reduced, and the problem of program runaway of a single chip microcomputer caused by incapability of generating a reset signal due to rapid power-on after power-off is avoided.

In other embodiments, diode D1 includes a switching diode.

The diode D1 may be a switching diode, such as a D4148 diode, among others. The switching diodes turn on and off at a higher rate, thus further reducing the time required to reset the voltage across the active capacitance E1. The reliability of the control section 2 is further improved.

In other embodiments, the control unit 2 further includes a current limiting resistor R1, a first terminal of the current limiting resistor R1 is connected to the reset terminal of the control unit 2, and a second terminal of the current limiting resistor R1 is grounded.

The current-limiting resistor R1 may limit the charging current in the charging state of the active capacitor E1, so as to adjust the charging time of the active capacitor E1, and the resistance of the current-limiting resistor R1 may be selected according to actual needs, so as to adjust the high-level holding time of the RST pin of the control unit 2. Optionally, the current limiting resistor R1 has a resistance of 30k ohms.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.