CN212540522U - Device for measuring current magnitude by using current thermal effect - Google Patents
Device for measuring current magnitude by using current thermal effect Download PDFInfo
- Publication number
- CN212540522U CN212540522U CN202021268283.5U CN202021268283U CN212540522U CN 212540522 U CN212540522 U CN 212540522U CN 202021268283 U CN202021268283 U CN 202021268283U CN 212540522 U CN212540522 U CN 212540522U
- Authority
- CN
- China
- Prior art keywords
- current
- heat
- temperature sensor
- display module
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides an utilize electric current fuel factor to survey device of electric current size belongs to instrument and meter technical field. The device includes: the device comprises a power supply, a fuse, a switch, a heating resistor, a heat-insulating sealed container, a heated medium, a temperature sensor, a singlechip and a display module. The power supply, the fuse, the switch and the heating resistor form a heating circuit to heat the medium; the temperature sensor, the singlechip and the display module form a measurement calculation display circuit. The heating circuit is connected, the heat effect generated by current passing through the resistor is converted into temperature rise of the medium, the single chip microcomputer collects temperature signals at regular time through the temperature sensor, and the size of the current is calculated and displayed on the display module according to the relation between the change of the medium temperature and the size of the current theoretically, so that the measurement of the size of the current is realized.
Description
Technical Field
The utility model belongs to the technical field of instrument and meter, especially, relate to an utilize device of electric current fuel factor measurement current size.
Background
When current passes through the resistor, the current does work to consume electric energy, and heat is generated, and the phenomenon is called the heat effect of the current. The ammeter commonly used by people is made according to the principle of an electromagnetic field, has the advantage of high sensitivity, but has the defects of inaccurate reading when the indication value is close to the limit value, poor overload capacity caused by thin wires for winding coils and the like. The current magnitude is measured by converting the current magnitude into the temperature change through the current thermal effect, and a new current measuring method is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize the device of electric current fuel factor measurement current size, can enrich the method of measuring current size.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a device for measuring current magnitude by using current thermal effect comprises a heat insulation sealed container, a heated medium arranged in the heat insulation sealed container, a power supply, a fuse, a switch, a heating resistor, a temperature sensor, a single chip microcomputer and a display module, wherein the power supply, the fuse, the switch and the heating resistor are connected in series to form a heating circuit; the temperature sensor, the singlechip and the display module are sequentially connected to form a measurement calculation display circuit; the heating resistor and the temperature sensor are arranged in the heat-insulating sealed container.
The utility model discloses the principle as follows: the measured current is added into the heating resistor, heat generated by the heat effect of the current directly acts on the medium through the resistor to enable the temperature of the medium to rise, theoretically, the change of the temperature of the medium and the current magnitude have a determined relation, the single chip microcomputer collects temperature signals at certain time intervals, then the current magnitude is calculated according to the relation between the temperature change and the current magnitude and displayed on the display module, and therefore the measurement of the current magnitude is achieved.
The beneficial effects of the utility model reside in that: when the traction motor works in a power generation state, the generated electric energy can be output to a power grid or a storage battery pack, so that the use of energy consumption resistors in the prior art is avoided, the generation of heat is reduced, the electric energy is saved, and the running safety of the elevator is improved. Due to the storage battery pack, when the power grid is powered off, normal operation of the elevator can be guaranteed, and reliability of the elevator is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus for measuring current magnitude by using current thermal effect according to an embodiment of the present invention.
Description of reference numerals:
1-a power supply; 2-a fuse; 3, switching; 4-heating resistance; 5-a temperature sensor; 6, a singlechip; 7-a display module; 8-heat-insulating sealed container; 9-heated medium.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a device for measuring current magnitude by using current thermal effect comprises a heat insulation sealed container 8, a heated medium 9 arranged in the heat insulation sealed container, a power supply 1, a fuse 2, a switch 3, a heating resistor 4, a temperature sensor 5, a singlechip 6 and a display module 7, wherein the power supply 1, the fuse 2, the switch 3 and the heating resistor 4 are connected in series to form a heating circuit to heat the heated medium 9; the temperature sensor 5, the singlechip 6 and the display module 7 are sequentially connected to form a measurement calculation display circuit; the heating resistor 4 and the temperature sensor 5 are arranged in the heat-insulating sealed container 8, and the heat-insulating sealed container 8 is used for insulating heat so that heat generated by the current heat effect is not transferred to the outside.
The working process is as follows:
1. switching on a heating circuit below the graph 1, and introducing current to be measured into a resistor;
2. after the resistor is electrified, the resistor heats and transfers heat to the medium, so that the temperature of the medium is increased;
3. measuring a temperature signal by a temperature sensor;
4. the single chip microcomputer collects temperature signals of the temperature sensor at each time interval, calculates the magnitude of current according to the theoretical relationship between the temperature change rate and the magnitude of heating current, and sends the calculated numerical value to the display module;
5. the display module displays according to the numerical value signal sent by the singlechip, and the display value is the magnitude numerical value of the current.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (1)
1. A device for measuring the current magnitude by using a current thermal effect is characterized by comprising a heat-insulating sealed container, a heated medium, a power supply, a fuse, a switch, a heating resistor, a temperature sensor, a single chip microcomputer and a display module, wherein the heated medium, the power supply, the fuse, the switch and the heating resistor are arranged in the heat-insulating sealed container and are connected in series to form a heating circuit; the temperature sensor, the singlechip and the display module are sequentially connected to form a measurement calculation display circuit; the heating resistor and the temperature sensor are arranged in the heat-insulating sealed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021268283.5U CN212540522U (en) | 2020-07-02 | 2020-07-02 | Device for measuring current magnitude by using current thermal effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021268283.5U CN212540522U (en) | 2020-07-02 | 2020-07-02 | Device for measuring current magnitude by using current thermal effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212540522U true CN212540522U (en) | 2021-02-12 |
Family
ID=74522705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021268283.5U Expired - Fee Related CN212540522U (en) | 2020-07-02 | 2020-07-02 | Device for measuring current magnitude by using current thermal effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212540522U (en) |
-
2020
- 2020-07-02 CN CN202021268283.5U patent/CN212540522U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201594116U (en) | Measuring device of battery internal resistance | |
| CN109696637B (en) | Method for monitoring capacity of lithium disposable battery | |
| CN105789655B (en) | Battery module thermometric and temperature control integral system | |
| CN206441833U (en) | A kind of battery control protective unit and electric automobile | |
| CN109546185A (en) | A kind of control system of methanol recapitalization fuel cell | |
| CN212540522U (en) | Device for measuring current magnitude by using current thermal effect | |
| CN103808432A (en) | Current induction electricity-taking wireless temperature measurement system with unclosed magnetic circuit, and micro-power-consumption communication method | |
| CN203705089U (en) | Non-closed magnetic circuit current induction electricity drawing wireless temperature measurement system | |
| CN201837481U (en) | Temperature sensor | |
| CN104236741A (en) | Temperature monitoring device and implementation method for outdoor high-pressure switch | |
| CN104251929A (en) | Self-supplying current measuring device | |
| CN207636689U (en) | A kind of distribution transformer operating state monitoring system | |
| CN206627581U (en) | Super capacitor module group test system | |
| CN203349964U (en) | Self-energy-obtaining wireless temperature sensing chip | |
| CN108287310B (en) | Lithium battery load detection device and load calculation method | |
| CN206556786U (en) | Temperature electrical measurement scaler | |
| CN201266209Y (en) | Electric energy meter | |
| CN201508209U (en) | Capacitance electronic fuel sensor | |
| CN204831604U (en) | RC charge -discharge temperature measurement system | |
| CN220670730U (en) | Wireless wire temperature rise sensor | |
| CN208156078U (en) | A kind of anti-breaking electrical metering system | |
| CN206725648U (en) | A kind of electrical parameter measuring device | |
| CN201893019U (en) | Intelligent single-phase full-electric quantity transducer | |
| CN206361980U (en) | A kind of solar water heater water-temperature based on fuzzy control automatically adjusts device | |
| CN212749188U (en) | Modular quick detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210212 Termination date: 20210702 |