CN110716084B - Power test load device and method for testing output power of short wave therapeutic apparatus - Google Patents
Power test load device and method for testing output power of short wave therapeutic apparatus Download PDFInfo
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- CN110716084B CN110716084B CN201910851775.2A CN201910851775A CN110716084B CN 110716084 B CN110716084 B CN 110716084B CN 201910851775 A CN201910851775 A CN 201910851775A CN 110716084 B CN110716084 B CN 110716084B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
Abstract
The invention discloses a power test load device and a method for testing output power of a short wave therapeutic apparatus, comprising a case and a case cover, wherein the case cover is connected with the case through a hinge and a lock catch; the back of the case is provided with a radiating fin and four series non-inductive resistors, one end of each series non-inductive resistor is connected with the negative pole of the lamp holder and the negative binding post, and the positive pole of the lamp holder at the other end is connected with the positive binding post; the silicon photocell is close to the incandescent bulb and is electrically connected with the pointer ammeter, and the adjustable potentiometer is connected between the silicon photocell and the pointer ammeter in series. The invention has the advantages that: need not directly be connected with the signal line, can not disturb short wave therapeutic instrument's resonant circuit, test error is little, and the test result is accurate.
Description
Technical Field
The invention relates to a power test load device, in particular to a power test load device and a method for testing output power of a short wave therapeutic apparatus.
Background
The frequency of the output signal of the short wave therapeutic apparatus is 27.12MHz, the power is 200W, the wavelength is 11.06 meters, and generally, in order to detect the power of the output signal of the short wave therapeutic apparatus, the following three methods are generally adopted:
the method comprises the following steps: as shown in fig. 1, a resistor R is connected in parallel at the output end of the short-wave therapeutic apparatus, an oscilloscope is used for reading a voltage value U at two ends of the resistor R, and the output power of the short-wave therapeutic apparatus can be obtained according to the power W = U/R; however, the disadvantages of this method are: when the oscilloscope is connected to two ends of the resistor R, the oscilloscope probe has distributed capacitance, which can affect the distributed capacitance of the short wave therapeutic apparatus resonance, thereby having a lot of influences on the output frequency and power of signals, and causing great test errors;
the second method comprises the following steps: as shown in fig. 2, a resistor R is connected in parallel at the output end of the short wave therapeutic apparatus, an oscilloscope and a high-frequency current transformer L are used for testing a current value I on a signal line, and an output power value of the short wave therapeutic apparatus can be obtained according to power W = I R; however, the disadvantages of this method are: the frequency range which can be tested by the oscilloscope and the high-frequency current transformer does not exceed 60MHz, the fundamental wave frequency of the short-wave therapeutic apparatus is 27.12MHz, the signal output is expanded according to the Fourier series, the fundamental wave frequency is 27.12MHz, and the frequency generated by the frequency doubling signal is integral multiple of the fundamental wave frequency, so the current transformer can not test the component of the frequency doubling signal frequency, and the error of the test result is larger;
the third method comprises the following steps: as shown in fig. 3, a resistor R is connected in parallel at the output end of the short wave therapeutic apparatus, a current value I on a signal line is tested by connecting a high-frequency ammeter in series on the output signal line, and the output power of the short wave therapeutic apparatus can be calculated according to the power W = I R; however, the disadvantages of this method are: the ammeter is connected in series in the signal line, can influence short wave therapeutic instrument resonant circuit's distributed capacitance, and then influences the frequency and the power size of output signal, leads to the test result error big.
The problems of the above three test methods are mainly summarized as follows: when a high-frequency ammeter or an oscilloscope is used for detection, the resonance capacitance on an output signal line can be influenced by the capacitance of the instrument, and the resonance of the short-wave therapeutic apparatus is influenced, so that the frequency or the power of an output signal is changed; the current transformer is used for testing the current value on the output signal line, the frequency range which can be tested by the current transformer is not more than 60MHz, and the measurement range is limited.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a power testing load device without using an oscilloscope, a high frequency ammeter or a current transformer and a method for outputting power of a short wave therapeutic apparatus using the same, which avoid interference to a resonant circuit of the short wave therapeutic apparatus and change the frequency or power of an output signal.
In order to achieve the purpose, the invention adopts the technical scheme that: a power test load device comprises a box body and a box cover, wherein the rear side of the box cover is hinged with the rear side of the box body through a hinge, the front side of the box cover is connected with the front side of the box body in a locking manner through a lock catch, an upper panel is arranged at the top of the box body, a positive wiring column, a negative wiring column and a pointer ammeter are arranged on the top surface of the upper panel, a silicon photovoltaic cell panel, two parallel direct-insertion resistors and an adjustable potentiometer are arranged on the bottom surface of the upper panel, a lower base plate, a lamp holder, a bulb and two electrode plate slots are further arranged below the upper panel and inside the box body, the bulb is arranged on the lamp holder, the lamp holder is fixed on the lower base plate and is close to the silicon photovoltaic cell panel, and the two electrode plate slots are respectively arranged at the left end and the right end of the lower base plate, the lower bottom plate is fixedly connected with the upper plate through an electrode connecting sheet, a radiating fin is arranged on the rear side of the box body, and four series-connected non-inductive resistors are arranged on one surface of the radiating fin facing the box body;
the positive and negative electrodes of the bulb are correspondingly connected with the positive and negative electrodes of the lamp holder, and the positive and negative electrodes of the lamp holder are correspondingly connected with the two electrode connecting sheets through a first connecting terminal respectively;
the electrode connecting sheet connected with the positive electrode of the lamp holder is also connected with the positive connecting post through a second connecting terminal and connected with one end of the four series-connected non-inductive resistors through a third connecting terminal respectively;
the electrode connecting sheet connected with the negative electrode of the lamp holder is also connected with the negative binding post through a second connecting terminal and is connected with the other ends of the four series-connected non-inductive resistors through a third connecting terminal;
the two parallel direct-insert resistors are connected in parallel between the positive and negative electrodes of the silicon photovoltaic cell panel, a serial branch formed by connecting the pointer ammeter and the adjustable potentiometer in series is connected in parallel between the positive and negative electrodes of the silicon photovoltaic cell panel, and a serial branch formed by connecting the pointer ammeter and the adjustable potentiometer in series is also connected in parallel with the two parallel direct-insert resistors;
the upper panel is also provided with two electrode plate jacks which are respectively arranged at the left end and the right end of the upper panel, and each electrode plate jack corresponds to one electrode plate slot and jointly forms one electrode slot; when the short-wave therapeutic apparatus is used, each electrode slot is correspondingly matched with one capacitor electrode of the short-wave therapeutic apparatus in an inserting manner, each capacitor electrode comprises an electrode plate and an electrode wire, each electrode wire is used for communicating the electrode plate corresponding to the electrode slot with an output channel of the short-wave therapeutic apparatus, and each electrode plate is used for being inserted into the electrode slot corresponding to the electrode wire; the power test load device also comprises a load calibration device, wherein the load calibration device is used for calibrating the corresponding relation between the pointer ammeter indicated value of the power test load device and the power consumption of the power test load device and making a corresponding calibration parameter table of pointer ammeter pointer indicated power.
In the above technical solution, the upper panel is further provided with a plurality of vent holes.
In the above technical solution, the upper panel is made of a bakelite plate with a size of 362mm by 243mm by 5 mm.
In the above technical solution, the pointer ammeter adopts a direct current pointer ammeter with a model number of 44C17-100 uA;
the silicon photovoltaic cell panel adopts a polycrystalline solar cell panel with the specification of 5V/60 mA/68 x 37 mm;
the direct-inserted resistor is a direct-inserted carbon film resistor with the specification of 2W/750 ohm;
the adjustable potentiometer is 3296W-10K.
In the above technical scheme, the lower base plate is made of an bakelite plate with the size specification of 285mm 60mm 5 mm.
In the above technical solution, the lamp holder is a screw ceramic flat lamp holder with model number E27;
the bulb adopts an incandescent bulb with the specification of 220V/40W;
the radiating fins are aluminum profile radiating fins with the size specification of 200mm 38mm 150 mm;
the non-inductive resistor is a radio frequency resistor with the specification of 250W/50 ohms.
In the technical scheme, each electrode plate slot is formed by two aluminum plates with the diameter of 170mm and the thickness of 1.2 mm.
The invention also provides a method for testing the output power of the short wave therapeutic apparatus by using the power test load device, which comprises the following steps:
s1, calibrating the corresponding relation between the pointer ammeter indicated value of the power test load device and the power consumption of the power test load device through the load calibration device, and making a corresponding calibration parameter table of the pointer ammeter indicated power;
s2, inserting two capacitance electrodes of the short wave therapeutic apparatus to be tested into two electrode slots of the power test load device;
s3, electrifying the short wave therapeutic apparatus to be tested, starting the short wave therapeutic apparatus to be tested to work, and recording the pointer indicated value of the pointer ammeter in the power test load device;
s4, according to the pointer indicated value of the pointer ammeter obtained in the step S3, finding out a corresponding power value from the power calibration parameter comparison table made in the step S1, wherein the power value is the output power of the short wave therapeutic apparatus to be detected.
In the method, in step S1, the load calibration device is composed of a voltage regulator, a voltmeter, and an ammeter, wherein an input end of the voltage regulator is used for connecting with 220V commercial power, and an output end of the voltage regulator is used for connecting with the power test load device after the ammeter and the voltmeter are connected in series and in parallel;
in step S1, calibrating, by the load calibration device, a corresponding relationship between an indicator value of the pointer ammeter of the load device for power test and power consumed by the load device for power test, which specifically includes the following steps:
s11, firstly connecting the input end of the voltage regulator with 220V mains supply, connecting the output end of the voltage regulator with a current meter and a parallel voltmeter in series, and then connecting the output end of the voltage regulator with a positive wiring column and a negative wiring column which are arranged on an upper panel in the power test load device through electric leads;
the ammeter is used for measuring the current at the output end of the voltage regulator, and the voltmeter is used for measuring the voltage at the output end of the voltage regulator;
s12, slowly increasing the output voltage of the voltage regulator, and recording the reading I of the ammeter, the reading U of the voltmeter and the indicating value I' of the pointer ammeter in the power test load device when the output voltage of the voltage regulator is adjusted every time;
s13, calculating an output power value W corresponding to the voltage regulator outputting the voltage U once according to the power W = U × I, and recording an indication value I' of a pointer ammeter pointer when the voltage regulator outputs the power value W;
s14, substituting the output power value W of the voltage regulator at different output voltages U and the indicating value I 'of the pointer ammeter pointer of the voltage regulator at different output power values W, which are obtained in the step S13, into an EXCLE table, and making a parameter comparison table of the pointer indicating value I' of the pointer ammeter pointer corresponding to the voltage regulator at different output power values W in a one-to-one correspondence manner, wherein the parameter comparison table is a calibration parameter table of the pointer indicating power of the pointer ammeter;
the method comprises the following steps that according to a reading I and a reading U which are measured by a current meter and a voltage meter, a power value which is obtained by calculation through a formula W = UxI is an output power value W of a voltage regulator, and the output power value W of the voltage regulator is a power value W' consumed by a power test load device;
therefore, the reading of the ammeter and the voltmeter is obtained, and the power value W' consumed by the power test load device can be obtained;
the power value W' consumed by the power test load device is the sum of the power consumed by the bulb and the four series-connected non-inductive resistors in the power test load device.
Compared with the prior art, the invention has the advantages and beneficial effects that:
(1) the device does not interfere with a resonance circuit of the short-wave therapeutic apparatus, can read power visually by reading an indicated value of the pointer table, and has small error and accurate test result;
(2) the device has simple structure and convenient operation.
The invention mainly comprises the following creation points: the relation between the power and the illumination intensity is calibrated by using the voltage regulator and is represented by the pointer meter, then the output signal power of the short-wave therapeutic apparatus is converted into the illumination intensity, so that the output power of the short-wave therapeutic apparatus can be read visually, the problem that the output power of the short-wave therapeutic apparatus is interfered with a resonant circuit when an oscilloscope, a high-frequency ammeter and a current transformer are used and need to be connected in a circuit to measure the output power of the short-wave therapeutic apparatus is solved, and the accuracy of a test result is ensured.
Drawings
FIG. 1 is a schematic diagram of a method for detecting output signal power of a short wave therapeutic apparatus by using an oscilloscope in the prior art;
FIG. 2 is a schematic diagram of detecting output signal power of a short wave therapeutic apparatus by using an oscilloscope and a current transformer in the prior art;
FIG. 3 is a schematic diagram of a prior art method for detecting output signal power of a short wave therapeutic apparatus by using an ammeter;
FIG. 4 is a schematic diagram of the detection of the output signal power of the short wave therapeutic apparatus using the power load measuring device provided by the present invention;
FIG. 5 is a first schematic structural diagram of a case of the power load measuring device of the present invention;
FIG. 6 is a first schematic structural diagram of a case of the power load measuring device of the present invention;
FIG. 7 is a first schematic diagram of the internal structure of the case of the power load measuring device according to the present invention;
FIG. 8 is a schematic diagram of a calibration circuit of the power load measuring device of the present invention
Description of reference numerals: 1. A box body; 2. an upper panel; 2a, electrode plate insertion holes; 2b, a vent hole; 3. a positive terminal post; 4. a negative terminal; 5. a pointer ammeter; 6. a silicon photovoltaic cell panel; 7. a direct-insertion resistor; 8. an adjustable potentiometer; 9. a lower base plate; 10. a lamp socket; 11. a bulb; 12. electrode plate slots; 13. an electrode connecting sheet; 14. a heat sink; 15. a non-inductive resistor; 16. a first connection terminal; 17. a second connection terminal; 18. a third connection terminal;
100. short wave therapeutic apparatus; 200. an oscilloscope; 300. an electrode sheet; 400. an electrode wire; 500. a voltage regulator; 600. a voltmeter; 700. and (4) an ammeter.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following description further explains how the invention is implemented by combining the attached drawings and the detailed implementation modes.
The power test load device provided by the invention is shown in figure 5, and comprises a box body 1 and a box cover (not shown in the figure), wherein the rear side of the box cover is hinged with the rear side of the box body 1 through a hinge (not shown in the figure), the front side of the box cover is connected with the front side of the box body 1 through a lock catch (not shown in the figure) in a locking manner, an upper panel 2 is arranged at the top of the box body 1, a positive wiring column 3, a negative wiring column 4 and a pointer ammeter 5 are arranged on the top surface of the upper panel 2, as shown in figure 7, a silicon photovoltaic cell panel 6, two parallel direct-insertion resistors 7 and an adjustable potentiometer 8 are arranged on the bottom surface of the upper panel 2, a lower bottom plate 9, a lamp holder 10, a lamp bulb 11 and two electrode plate slots 12 are further arranged below the upper panel 2 and positioned in the box body 1, the lamp bulb 11 is arranged on the lamp holder, the bulb 11 is close to the silicon photocell plate 6, the two electrode plate slots 12 are respectively arranged at the left end and the right end of the lower base plate 9 and are respectively connected and fixed with the lower base plate 9 through one electrode connecting sheet 13, as shown in fig. 6, a radiating fin 14 is also arranged at the rear side of the box body 1, and four series non-inductive resistors 15 are also arranged at one side of the radiating fin 14 facing the box body 1;
as shown in fig. 7 and 8, the positive and negative electrodes of the bulb 11 are correspondingly connected with the positive and negative electrodes of the lamp holder 10, and the positive and negative electrodes of the lamp holder 10 are correspondingly connected with the two electrode connecting sheets 13 through a first connecting terminal 16;
the electrode connecting sheet 13 connected with the positive electrode of the lamp holder 10 is also connected with the positive connecting post 3 through a second connecting terminal 17 and connected with one end of four series-connected non-inductive resistors 15 through a third connecting terminal 18 respectively;
the electrode connecting sheet 13 connected with the negative electrode of the lamp holder 10 is also connected with the negative binding post 4 through a second connecting terminal 17 and connected with the other ends of the four series-connected non-inductive resistors 15 through a third connecting terminal 18 respectively;
the two parallel direct-insert resistors 7 are connected in parallel between the positive and negative electrodes of the silicon photovoltaic cell panel 6, a serial branch formed by connecting the pointer ammeter 5 and the adjustable potentiometer 8 in series is connected in parallel between the positive and negative electrodes of the silicon photovoltaic cell panel 6, and a serial branch formed by connecting the pointer ammeter 5 and the adjustable potentiometer 8 in series is also connected in parallel with the two parallel direct-insert resistors 7;
as shown in fig. 5, two electrode plate insertion holes 2a are further formed in the upper panel 2, the two electrode plate insertion holes 2a are respectively formed at the left end and the right end of the upper panel 2, and each electrode plate insertion hole 2a corresponds to one electrode plate insertion slot 12 and forms one electrode insertion slot together; when in use, each electrode slot is correspondingly matched with one capacitor electrode of the short wave therapeutic apparatus 100 in an inserting manner, as shown in fig. 4, each capacitor electrode comprises an electrode plate 300 and an electrode wire 400, each electrode wire 400 is used for communicating the electrode plate 300 corresponding to the electrode slot and an output channel of the short wave therapeutic apparatus 100, and each electrode plate 300 is used for being inserted into the corresponding electrode slot. Referring to fig. 8, the load device for power test provided by the present invention further includes a load calibration device, where the load calibration device is configured to calibrate a corresponding relationship between an instruction value of the pointer ammeter 5 of the load device for power test and power consumption of the load device for power test, and to prepare a corresponding calibration parameter table indicating power by a pointer of the pointer ammeter 5; when the power test load device is used, the power test load device can find corresponding power according to the obtained pointer value of the pointer ammeter and by referring to a formulated calibration parameter table of pointer indication power of the pointer ammeter, and the power is the output power of the short wave therapeutic apparatus to be tested, which is measured by the power test load device.
As shown in fig. 5, the upper panel 2 is further provided with a plurality of vent holes 2 b.
Specifically, in the present invention, the upper panel 2 is made of a bakelite plate having a size of 362mm by 243mm by 5 mm; the lower bottom plate 9 is made of an bakelite plate with the size specification of 285mm 60mm 5 mm; each electrode plate slot 12 is composed of two aluminum plates with the diameter of 170mm and the thickness of 1.2 mm; the pointer ammeter 5 adopts a direct current pointer ammeter with the model number of 44C17-100 uA; the silicon photovoltaic cell panel 6 adopts a polycrystalline solar cell panel with the specification of 5V/60 mA/68 x 37 mm; the direct-insert resistor 7 adopts a direct-insert carbon film resistor with the specification of 2W/750 ohm; the adjustable potentiometer 8 adopts a precise adjustable potentiometer with the model of 3296W-10K; the lamp holder 10 adopts a screw ceramic flat lamp holder with the model number of E27; the bulb 11 adopts an incandescent bulb with the specification of 220V/40W; the radiating fins 14 are aluminum profile radiating fins with the size specification of 200mm 38mm 150 mm; the non-inductive resistor 15 adopts a radio frequency resistor with the specification of 250W/50 ohm.
When the power test load device provided by the invention is used for testing the output power of the short wave therapeutic apparatus, the method specifically comprises the following steps:
s1, calibrating the corresponding relation between the pointer ammeter 5 indicated value of the power test load device and the power consumption of the power test load device through the load calibration device, and making a corresponding calibration parameter table of the pointer ammeter 5 pointer indicated power; s2, inserting two capacitance electrodes of the short wave therapeutic apparatus 100 to be tested into two electrode slots of a power test load device, wherein each electrode slot is composed of an electrode plate jack 2a shown in figure 5 and an electrode plate slot 12 shown in figure 7;
s3, electrifying the short wave therapeutic apparatus 100 to be tested, starting the short wave therapeutic apparatus 100 to be tested to work, and recording the pointer indicated value of the pointer ammeter 5 in the power test load device;
s4, according to the pointer indicated value of the pointer ammeter 5 obtained in the step S3, finding out a corresponding power value from the power calibration parameter comparison table made in the step S1, wherein the power value is the output power of the short wave therapeutic apparatus 100 to be detected.
Specifically, in step S1 of the testing method, as shown in fig. 8, the load calibration device is composed of a voltage regulator 500, a voltmeter 600 and an ammeter 700, wherein an input end of the voltage regulator 500 is used for being connected with the 220V mains supply, and an output end of the voltage regulator 500 is used for being connected with the power testing load device after the ammeter 700 and the voltmeter 600 are connected in series and in parallel;
specifically, in step S1 of the testing method, the load calibration device is used to calibrate a corresponding relationship between an indication value of a pointer current meter of the load device under power test and power consumption of the load device under power test, and the method specifically includes the following steps:
s11, firstly connecting the input end of the voltage regulator 500 with 220V commercial power, and connecting the output end of the voltage regulator with a positive wiring column 3 and a negative wiring column 4 which are arranged on an upper panel 2 in the power test load device through electric leads after connecting the ammeter 700 and the parallel voltmeter 600 in series;
the ammeter 700 is used for measuring the current at the output end of the voltage regulator 500, and the voltmeter 600 is used for measuring the voltage at the output end of the voltage regulator 500;
s12, slowly increasing the output voltage of the voltage regulator 500, and recording the reading I of the ammeter 700, the reading U of the voltmeter 600, and the indication value I' of the pointer ammeter 5 in the power test load device when the output voltage of the voltage regulator 500 is adjusted every time;
s13, calculating an output power value W corresponding to each adjustment of the voltage U by the voltage regulator 500 according to the power W = U × I, and recording an indication value I' of the pointer ammeter 5 when the voltage regulator 500 outputs the power value W;
s14, substituting the output power value W of the voltage regulator 500 at different output voltages U and the indicating value I 'of the pointer ammeter 5 at different output power values W of the voltage regulator 500 obtained in the step S13 into an EXCLE table, and making a parameter comparison table of the pointer indicating value I' of the pointer ammeter 5 corresponding to the voltage regulator 500 at different output power values W in a one-to-one correspondence manner, wherein the parameter comparison table is a calibration parameter table of the pointer indicating power of the pointer ammeter 5;
according to the reading I and the reading U measured by the ammeter 700 and the voltmeter 600, the power value obtained by calculating the formula W = U × I is the output power value W of the voltage regulator 500, and the output power value W of the voltage regulator 500 is the power value W' consumed by the power test load device;
therefore, the readings of the ammeter 700 and the voltmeter 600 are obtained, and the power value W' consumed by the power test load device can be obtained;
the power value W' consumed by the power test load device is the sum of the power consumed by the bulb 11 and the four series-connected non-inductive resistors 15 in the power test load device.
The following describes the design principle of the present invention specifically:
when two capacitor electrodes of the short wave therapeutic apparatus 100 are inserted into two electrode slots of the load device as shown in fig. 5, the electrode plate 300 of each capacitor electrode is located in the corresponding electrode plate slot 12 formed by two round aluminum sheets with the diameter of 170mm and is in contact with the round aluminum sheets of the electrode plate slot 12;
when the two capacitor electrodes of the short wave therapeutic apparatus 100 output signals, the electrode plate slots 12 formed by the phi 170 circular aluminum sheets in the load device can sense the signals output by the capacitor electrodes of the short wave therapeutic apparatus 100, and as the lamp holder 10 in the load device is connected in parallel to the two electrode plate slots 12 formed by the phi 170 circular aluminum sheets, and the bulb 11 is installed on the lamp holder 10, namely the bulb 11 is connected in parallel to the two electrode plate slots 12, the electric signals sensed by the electrode plate slots 12 can be directly acted on the bulb 11; in addition, because the load resistor formed by connecting 4 non-inductive resistors of 250W/50 ohm in series is also connected in parallel to the two electrode plate slots 12 through the electric lead, the electric signal sensed by the electrode plate slots 12 can be simultaneously supplied to the load resistor formed by the 4 non-inductive resistors 15 of 250W/50 ohm;
when the bulb 11 obtains an electric signal, the bulb 11 emits bright light to irradiate the silicon photovoltaic panel 6, so that voltage is generated on the silicon photovoltaic panel 6 and is indicated by the pointer ammeter 5; the intensity of light emitted by the bulb 11 is in direct proportion to the intensity of electric signals at two ends of the bulb 11, that is, the stronger the intensity of light emitted by the bulb 11 is, the larger the voltage generated on the silicon photovoltaic cell panel 6 is; therefore, as long as the corresponding relation between the indicated value of the pointer ammeter 5 and the total power consumed by the bulb 11 and the 4 non-inductive resistors 15 is clarified, that is, the indicated value of the pointer ammeter 5 is correspondingly calibrated, the power output by the capacitor electrode of the short wave therapeutic apparatus 100 can be intuitively read by reading the indicated value of the pointer ammeter 5; in the present invention, a load calibration device composed of a voltage regulator 500, a voltmeter 600 and an ammeter 700 is adopted to perform corresponding power calibration on the indicated value of the pointer ammeter 5 of the load device.
In the present invention, the voltage regulator 500 in the load calibration device is used to supply power to the load device, the ammeter 700 is used to test the output current of the voltage regulator 500, and the voltmeter 600 is used to measure the output voltage of the voltage regulator 500, wherein the current measured by the ammeter 700 is the total current supplied to the load device, and the voltage measured by the voltmeter 600 is the total voltage supplied to the load device, so as to measure the current and voltage at the output terminal of the voltage regulator 500, i.e. the current and voltage at the load device, because the output terminal of the voltage regulator 500 is directly connected to the positive and negative terminals of the load device, which are directly connected to the two electrode sockets 12, and the two electrode sockets 12 are connected in parallel with the bulb 11 and the load resistor formed by connecting 4 non-inductive resistors of 250W/50 ohms in series, so that, as long as the current and voltage at the output terminal of the voltage regulator 500 are, the current and the voltage on the load device can be measured, and the power consumed by the load device can be obtained according to the power W = UxI;
when the voltage regulator 500 adjusts to different output voltages U1, the bulb and the load resistor also obtain different voltages U1, and further obtain different currents I1, and when the output voltage U1 of the voltage regulator 500 is larger, the voltage U1 obtained by the bulb 11 is also larger, so that the light emitted by the bulb 11 is stronger, the voltage generated by the silicon photovoltaic panel 6 is also larger, and the indication value of the pointer ammeter 5 is larger;
by changing the output voltage U1 of the voltage regulator 500, the voltage U1 and the current I1 obtained by a bulb and a load resistor can be changed, namely the power W1 consumed by the load device can be changed, and by recording the positions indicated by the pointer ammeter 5 when different W1 values exist, the corresponding relation between the W1 and the pointer indicated value of the pointer ammeter 5 can be obtained, namely the corresponding relation between the power W consumed by the load device and the indicated value of the pointer ammeter 5 can be calibrated, and the indicated value of the pointer ammeter 5 can also be used for representing the power value.
For example, when we calculate the output power of the voltage regulator 500 to be 200 watts, the pointer of the pointer ammeter 5 indicates the value of 80, which means that when the pointer ammeter is 80, the indicated power value is 200 watts.
Finally, the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields using the contents of the present specification and the attached drawings are included in the scope of the present invention.
Claims (9)
1. The utility model provides a power test load device, contains box (1) and case lid, the rear side of case lid with the rear side of box (1) is passed through the hinge and is articulated, the front side of case lid with the front side of box (1) is passed through the hasp closure and is connected its characterized in that: the top of the box body (1) is provided with an upper panel (2), the top surface of the upper panel (2) is provided with a positive wiring column (3), a negative wiring column (4) and a pointer ammeter (5), the bottom surface of the upper panel (2) is provided with a silicon photocell panel (6), two parallel direct-insertion resistors (7) and an adjustable potentiometer (8), a lower bottom plate (9), a lamp holder (10), a bulb (11) and two electrode plate slots (12) are arranged below the upper panel (2) and inside the box body (1), the bulb (11) is installed on the lamp holder (10), the lamp holder (10) is fixed on the lower bottom plate (9), the bulb (11) is close to the silicon photocell panel (6), the two electrode plate slots (12) are respectively arranged at the left end and the right end of the lower bottom plate (9), the lower base plate (9) is fixedly connected with the electrode connecting sheet (13), a radiating fin (14) is arranged on the rear side of the box body (1), and four series non-inductive resistors (15) are arranged on one surface, facing the box body (1), of the radiating fin (14);
the positive and negative electrodes of the bulb (11) are correspondingly connected with the positive and negative electrodes of the lamp holder (10), and the positive and negative electrodes of the lamp holder (10) are correspondingly connected with the two electrode connecting sheets (13) through a first connecting terminal (16);
the electrode connecting sheet (13) connected with the positive electrode of the lamp holder (10) is also connected with the positive connecting post (3) through a second connecting terminal (17) and connected with one end of the four series-connected non-inductive resistors (15) through a third connecting terminal (18) respectively;
the electrode connecting sheet (13) connected with the negative electrode of the lamp holder (10) is also connected with the negative binding post (4) through a second connecting terminal (17) and connected with the other ends of the four series-connection noninductive resistors (15) through a third connecting terminal (18) respectively;
the two parallel direct-insert resistors (7) are connected in parallel between the positive and negative electrodes of the silicon photovoltaic cell panel (6), a serial branch formed after the pointer ammeter (5) and the adjustable potentiometer (8) are connected in series is connected in parallel between the positive and negative electrodes of the silicon photovoltaic cell panel (6), and a serial branch formed after the pointer ammeter (5) and the adjustable potentiometer (8) are connected in series is also connected in parallel with the two parallel direct-insert resistors (7);
two electrode plate jacks (2 a) are further formed in the upper panel (2), the two electrode plate jacks (2 a) are respectively formed in the left end and the right end of the upper panel (2), and each electrode plate jack (2 a) corresponds to one electrode plate slot (12) and jointly forms one electrode slot; when the short wave therapeutic apparatus is used, each electrode slot is correspondingly matched with one capacitor electrode of the short wave therapeutic apparatus (100) in an inserting mode, each capacitor electrode comprises an electrode plate (300) and an electrode wire (400), each electrode wire (400) is used for communicating the electrode plate (300) corresponding to the electrode slot with an output channel of the short wave therapeutic apparatus (100), and each electrode plate (300) is used for being inserted into the electrode slot corresponding to the electrode slot;
the power test load device also comprises a load calibration device, wherein the load calibration device is used for calibrating the corresponding relation between the pointer ammeter (5) indication value of the power test load device and the power consumption of the power test load device and making a corresponding calibration parameter table of the pointer ammeter (5) indication power; when the power test load device is used, the power test load device can find corresponding power according to the obtained pointer value of the pointer ammeter and by referring to a formulated calibration parameter table of pointer indication power of the pointer ammeter, and the power is the output power of the short wave therapeutic apparatus to be tested, which is measured by the power test load device.
2. The power-testing load device of claim 1, wherein: the upper panel (2) is also provided with a plurality of vent holes (2 b).
3. The power-testing load device of any one of claims 1 or 2, wherein: the upper panel (2) is made of a bakelite plate with the size specification of 362mm x 243mm x 5 mm.
4. The power-testing load device of any one of claims 1 or 2, wherein:
the pointer ammeter (5) adopts a direct current pointer ammeter with the model number of 44C17-100 uA;
the silicon photovoltaic cell panel (6) adopts a polycrystalline solar cell panel with the specification of 5V/60 mA/68 x 37 mm;
the direct-insertion resistor (7) adopts a direct-insertion carbon film resistor with the specification of 2W/750 ohm;
the adjustable potentiometer (8) is an adjustable potentiometer with the model of 3296W-10K.
5. The power-testing load device of any one of claims 1 or 2, wherein: the lower bottom plate (9) is made of an bakelite plate with the size specification of 285mm 60mm 5 mm.
6. The power-testing load device of any one of claims 1 or 2, wherein:
the lamp holder (10) adopts a screw ceramic flat lamp holder with the model number of E27;
the bulb (11) adopts an incandescent bulb with the specification of 220V/40W;
the radiating fins (14) are aluminum profile radiating fins with the size specification of 200mm 38mm 150 mm;
the noninductive resistor (15) adopts a radio frequency resistor with the specification of 250W/50 ohms.
7. The power-testing load device of any one of claims 1 or 2, wherein: each electrode slice slot (12) is composed of two aluminum plates with the diameter of 170mm and the thickness of 1.2 mm.
8. A method of testing the output power of a short wave therapeutic apparatus using the power testing load device of claim 1, wherein: comprises the following steps:
s1, calibrating the corresponding relation between the pointer ammeter (5) indication value of the power test load device and the power consumption of the power test load device through the load calibration device, and making a corresponding calibration parameter table of the pointer ammeter (5) indication power;
s2, inserting two capacitance electrodes of the short wave therapeutic apparatus (100) to be tested into two electrode slots of the power test load device;
s3, electrifying the short wave therapeutic apparatus (100) to be tested, starting the short wave therapeutic apparatus (100) to be tested to work, and recording the pointer indicated value of the pointer ammeter (5) in the power test load device;
s4, according to the pointer indicated value of the pointer ammeter (5) obtained in the step S3, finding out a corresponding power value from the power calibration parameter comparison table made in the step S1, wherein the power value is the output power of the short wave therapeutic apparatus (100) to be detected.
9. The method of claim 8 for testing output power of a shortwave therapy device using the power testing load device of claim 1, wherein: in step S1, the load calibration device is composed of a voltage regulator (500), a voltmeter (600) and an ammeter (700), wherein an input end of the voltage regulator (500) is used for being connected with a 220V mains supply, and an output end of the voltage regulator (500) is used for being connected with the power test load device after the ammeter (700) and the voltmeter (600) are connected in series;
in step S1, calibrating, by the load calibration device, a corresponding relationship between an indicator value of the pointer ammeter of the load device for power test and power consumed by the load device for power test, which specifically includes the following steps:
s11, firstly connecting the input end of a voltage regulator (500) with 220V mains supply, connecting the output end of the voltage regulator in series with an ammeter (700) and a parallel voltmeter (600), and then connecting the output end of the voltage regulator with a positive wiring column (3) and a negative wiring column (4) which are arranged on an upper panel (2) in a power test load device through electric leads;
the ammeter (700) is used for measuring the current at the output end of the voltage regulator (500), and the voltmeter (600) is used for measuring the voltage at the output end of the voltage regulator (500);
s12, slowly increasing the output voltage of the voltage regulator (500), and recording the reading I of the ammeter (700), the reading U of the voltmeter (600) and the indication value I' of the pointer ammeter (5) in the power test load device when the output voltage of the voltage regulator (500) is adjusted;
s13, calculating an output power value W corresponding to each time the voltage regulator (500) adjusts the output voltage U according to the power W = UxI, and recording an indication value I' of a pointer of the pointer ammeter (5) when the voltage regulator (500) outputs the power value W;
s14, substituting the output power value W of the voltage regulator (500) at different output voltages U and the indicating value I 'of the pointer ammeter (5) at different output power values W of the voltage regulator (500) obtained in the step S13 into an EXCLE table, and making a parameter comparison table of the pointer indicating value I' of the pointer ammeter (5) corresponding to the voltage regulator (500) at different output power values W in a one-to-one correspondence manner, wherein the parameter comparison table is a parameter calibration table of the pointer indicating power of the pointer ammeter (5);
according to the reading I and the reading U measured by the ammeter (700) and the voltmeter (600), calculating a power value obtained by the formula W = UxI, namely an output power value W of the voltage regulator (500), wherein the output power value W of the voltage regulator (500) is a power value W' consumed by a power test load device;
therefore, the readings of the ammeter (700) and the voltmeter (600) are obtained, and the power value W' consumed by the power test load device can be obtained;
the power value W' consumed by the power test load device is the sum of power consumed by a bulb (11) and four series-connected non-inductive resistors (15) in the power test load device.
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