CN210720543U - Component welding point electrical parameter acquisition circuit - Google Patents
Component welding point electrical parameter acquisition circuit Download PDFInfo
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- CN210720543U CN210720543U CN201921408414.2U CN201921408414U CN210720543U CN 210720543 U CN210720543 U CN 210720543U CN 201921408414 U CN201921408414 U CN 201921408414U CN 210720543 U CN210720543 U CN 210720543U
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Abstract
The utility model belongs to the technical field of the detection circuitry, especially, relate to a components and parts welding point electrical parameter acquisition circuit, including power supply circuit, control chip, PC communication circuit and electrical parameter measurement circuit, electrical parameter measurement circuit includes: the measuring device comprises a measuring chip, a meter pen connecting circuit and a circuit on-off measuring circuit. The utility model discloses a set up control chip PC communication circuit with electrical parameter measurement circuit makes control chip U4 can control measurement chip makes on the one hand measurement chip passes through the electrical parameter of components and parts welding point is measured to the pen-shape metre connecting circuit, and on the other hand passes through circuit break-make measurement circuit measures the circuit break-make on the circuit board, so, can pass through PC communication circuit and PC end communication, hold data transmission to PC for electrical parameter's collection efficiency is high, and can adapt to the electrical parameter collection of multiple circuit board, and the commonality is strong, detects with low costs.
Description
Technical Field
The utility model belongs to the technical field of the detection circuitry, especially, relate to a components and parts welding point electrical parameter acquisition circuit.
Background
At present, in the production process of electronic products such as mobile phones, flat panels, notebooks, desktop computers, televisions and the like, a circuit board in the electronic products needs to be detected for many times so as to judge whether the circuit board is qualified or not; and when the electronic product breaks down and needs to be maintained, the damaged position of the internal circuit board of the electronic product also needs to be detected, and the damaged component is positioned, so that the electronic product can be maintained in a targeted manner.
Generally, the detection and maintenance of the circuit board of the electronic product are mostly carried out manually, the manual operation in a traditional mode is multimeter measurement, the electrical parameter values of welding points are manually recorded, the efficiency is very low, special personnel are needed, and the personnel waste is caused. The other mode is that different detection and maintenance equipment are specially designed for different electronic products, and the detection and maintenance equipment can only measure certain electronic products, and the procedure is fixed, and the equipment is expensive, and the measurement preparation period is long, and special jigs need to be customized, so that the problems of poor universality of detection equipment and high detection cost are caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a components and parts welding point electrical parameter acquisition circuit, inefficiency and the detection device commonality is poor and detect with high costs technical problem when aiming at solving among the prior art to components and parts welding point electrical parameter acquisition.
In order to achieve the above object, an embodiment of the present invention provides a circuit for collecting electrical parameters of a component soldering point, including a power circuit, and further including a control chip, a PC communication circuit and an electrical parameter measuring circuit, all connected to the power circuit, wherein the PC communication circuit and the electrical parameter measuring circuit are all connected to the control chip; wherein the electrical parameter measurement circuit comprises:
the measurement chip is connected with the control chip;
the meter pen connecting circuit is connected with the measuring chip and the control chip;
the circuit on-off measuring circuit is connected with the meter pen connecting circuit; the control chip controls the measuring chip to enable the measuring chip to measure the electrical parameters of the welding point of the component through the meter pen connecting circuit, and the circuit on-off measuring circuit measures the circuit on the circuit board through the circuit on-off measuring circuit.
Optionally, the circuit on-off measuring circuit includes a second chip, a first inductor, a first resistor, a sliding rheostat, a sixth resistor, a fifth light emitting diode, a seventh capacitor, a fourth light emitting diode, a second resistor, a second light emitting diode, and a square wave output end; the first inductor, the first resistor, the sliding rheostat and the sixth resistor are sequentially connected, the other end of the sixth resistor is connected with the cathode of the fifth light emitting diode, the anode of the fifth light emitting diode is respectively connected with the seventh capacitor and the cathode of the fourth light emitting diode, the other end of the seventh capacitor is connected with the first pin of the second chip, the first pin of the second chip is grounded, the cathode of the fourth light emitting diode is further connected with the second pin and the sixth pin of the second chip, the anode of the fourth light emitting diode is respectively connected with the sliding rheostat and the seventh pin of the second chip, and the third pin of the second chip is sequentially connected with the second resistor, the second light emitting diode and the square wave output end.
Optionally, the stylus connecting circuit includes a first connecting circuit and a second connecting circuit, and the first connecting circuit and the second connecting circuit are both connected to the measuring chip and the control chip.
Optionally, the first connection circuit includes a first relay, a twenty-fourth resistor, a red pen connection terminal, a black pen connection terminal, an eighth light emitting diode, a second triode, and a fortieth resistor; the third pin of the first relay is connected with the thirteenth pin of the measuring chip, the fifth pin of the first relay is connected with the twenty-fourth resistor, the other end of the twenty-fourth resistor is connected with the red pen connecting end and the fourth pin of the first relay respectively, the black pen connecting end is grounded, the anode of the eighth light-emitting diode is connected with the eighth pin of the first relay and the collector of the second triode respectively, the cathode of the eighth light-emitting diode is connected with the power circuit, the emitter of the second triode is grounded, the base of the second triode is connected with the forty-th resistor, and the other end of the forty-th resistor is connected with the seventh pin of the control chip.
Optionally, the second connection circuit includes a second relay, a seventh light emitting diode, a third triode, and a forty-first resistor, a third pin of the second relay is connected to the square wave output terminal, a fourth pin of the second relay is connected to one end of the twenty-fourth resistor, an anode of the seventh light emitting diode is connected to an eighth pin of the second relay and a collector of the third triode, a cathode of the seventh light emitting diode is connected to the power circuit, an emitter of the third triode is grounded, a base of the third triode is connected to the forty-first resistor, and the other end of the forty-first resistor is connected to the control chip.
Optionally, the PC communication circuit includes a USB interface and a serial port conversion chip, a sixth pin, a seventh pin, and an eighth pin of the USB interface are grounded, the first pin of the USB interface is connected to the sixteenth pin of the serial port conversion chip, the third pin of the serial port conversion chip is connected to the eighth pin of the control chip, and the second pin of the serial port conversion chip is connected to the ninth pin of the control chip.
Optionally, the power circuit includes a voltage stabilizing chip, a second capacitor, a third capacitor and a first light emitting diode, a third pin of the voltage stabilizing chip is connected to the first pin of the USB interface, the third pin of the voltage stabilizing chip is further connected to the anode of the second capacitor, the cathode of the second capacitor is connected to the first pin of the voltage stabilizing chip, the first pin of the voltage stabilizing chip is grounded, the first pin of the voltage stabilizing chip is further connected to the third capacitor, and the other end of the third capacitor is connected to the first light emitting diode after being connected to the second pin and the fourth pin of the voltage stabilizing chip.
Optionally, the component welding point electrical parameter acquisition circuit further comprises a gear selector switch, one end of the gear selector switch is connected with the third pin of the control chip, and the other end of the gear selector switch is grounded.
Optionally, components and parts welding point electrical parameter acquisition circuit still includes buzzer circuit, buzzer circuit includes twenty-third resistance, first triode and buzzer, the one end of twenty-third resistance with control chip's seventeenth pin is connected, the other end of twenty-third resistance with the base of first triode is connected, the projecting pole ground connection of first triode, the collecting electrode of first triode with buzzer connects, buzzer still with power supply circuit connects.
Optionally, the component soldering point electrical parameter acquisition circuit further comprises a display circuit, the display circuit comprises a display screen, a first pin of the display screen is connected with the power circuit, a second pin of the display screen is connected with a twentieth pin of the control chip, a third pin of the display screen is connected with a nineteenth pin of the control chip, and a fourth pin of the display screen is grounded.
The embodiment of the utility model provides an above-mentioned one or more technical scheme in the components and parts welding point electrical parameter acquisition circuit have one of following technological effect at least: the utility model discloses a set up control chip U4 PC communication circuit with electrical parameter measurement circuit makes control chip U4 can control measurement chip U3 makes on the one hand measurement chip U3 passes through the electrical parameter of meter pen connecting circuit measurement components and parts welding point, on the other hand passes through circuit break-make on the circuit break-make measurement circuit board is circuit break-make, so, can pass through PC communication circuit and PC end communication hold data transmission to PC end for electrical parameter's collection efficiency is high, and can adapt to the electrical parameter collection of multiple circuit board, and the commonality is strong, and detection cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a circuit schematic diagram of a circuit for collecting electrical parameters of a welding point of a component provided by an embodiment of the present invention;
fig. 2 is a circuit block diagram of a circuit for collecting electrical parameters of a welding point of a component provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a circuit on-off measuring circuit provided by the embodiment of the present invention;
fig. 4 is a schematic diagram of a first connection circuit provided in an embodiment of the present invention;
fig. 5 is a schematic diagram of a second connection circuit provided in an embodiment of the present invention;
fig. 6 is a schematic diagram of a PC communication circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a buzzer circuit provided in the embodiment of the present invention;
fig. 8 is a schematic diagram of a display circuit according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
power supply circuit 100PC communication circuit 200 electrical parameter measurement circuit 300
320 buzzer circuit 400 display circuit 500 of on-off measuring circuit of circuit
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
In an embodiment of the present invention, as shown in fig. 1-8, there is provided a circuit for collecting electrical parameters of a component soldering point, including a power circuit 100, a control chip U4 connected to the power circuit 100, a PC communication circuit 200 and an electrical parameter measuring circuit 300, where the PC communication circuit 200 and the electrical parameter measuring circuit 300 are both connected to the control chip U4; wherein the electrical parameter measurement circuit 300 comprises: the measuring chip U3, the meter pen connecting circuit 310 and the line on-off measuring circuit 320. The measurement chip U3 is connected with the control chip U4; the meter pen connecting circuit is connected with the measuring chip U3 and the control chip U4; the circuit on-off measuring circuit 320 is connected with the meter pen connecting circuit 310; the control chip U4 controls the measurement chip U3, so that the measurement chip U3 measures the electrical parameters of the welding points of the components through the meter pen connecting circuit 310, and measures the on-off of the circuit on the circuit board through the circuit on-off measurement circuit 320.
Specifically, sixty-four pins of the measurement chip U3 are connected with the tenth pin of the control chip U4. Thirty-eight pins of the measurement chip U3 are connected with a thirteenth pin of the control chip U4, thirty-nine pins of the measurement chip U3 are connected with a twelfth pin of the control chip U4, and forty pins of the measurement chip U3 are connected with an eleventh pin of the control chip U4.
Further, in this embodiment, the model of the measurement chip U3 is FS 9721. To control chip U4's model, the utility model discloses do not specifically restrict, as long as can with measurement chip U3 realizes control can.
It is right below the component welding point electrical parameter acquisition circuit of the utility model make further explanation: the utility model discloses a set up control chip U4 PC communication circuit 200 with electrical parameter measurement circuit 300 makes control chip U4 can control measure chip U3, makes on the one hand measure chip U3 and pass through the electrical parameter of components and parts welding point is measured to pen-shape metre connecting circuit 310, and on the other hand passes through circuit break-make on the 320 measurement circuit boards of circuit break-make circuit, so, can pass through PC communication circuit 200 communicates with the PC end, holds data transmission to PC for electrical parameter's collection efficiency is high, and can adapt to the electrical parameter collection of multiple circuit board, and the commonality is strong, and detection cost is low.
In another embodiment of the present invention, as shown in fig. 3, the circuit on-off measuring circuit 320 includes a second chip U2, a first inductor L1, a first resistor R1, a sliding rheostat R4, a sixth resistor R6, a fifth light emitting diode D5, a seventh capacitor C7, a fourth light emitting diode D4, a second resistor R2, a second light emitting diode D2, and a square wave output terminal CAP-COUT; the first inductor L1, the first resistor R1, the slide rheostat R4 and the sixth resistor R6 are connected in sequence, the other end of the sixth resistor R6 is connected to the cathode of the fifth LED D5, the anode of the fifth LED D5 is connected to the seventh capacitor C7 and the cathode of the fourth LED D4 respectively, the other end of the seventh capacitor C7 is connected to the first pin of the second chip U2, the first pin of the second chip U2 is grounded, the cathode of the fourth light emitting diode D4 is also connected to the second pin and the sixth pin of the second chip U2, the anodes of the fourth light emitting diode D4 are respectively connected with the slide rheostat R4 and the seventh pin of the second chip U2, and a third pin of the second chip U2 is sequentially connected to the second resistor R2, the second light emitting diode D2 and the square wave output terminal CAP-COUT.
Specifically, in this embodiment, the second chip U2 is a 555 chip. Further, the working principle of the circuit on-off measuring circuit 320 is as follows: the oscillator starts oscillating as soon as the circuit is applied with a voltage VCC _ CAP. Since the seventh capacitor C7 cannot suddenly change, initially, the seventh capacitor C7 is charged through the first resistor R1, the sliding resistor R4 and the fourth light emitting diode D4, when the seventh capacitor C7 is charged to the threshold level 2/3VCC _ CAP, the second chip U2 is reset, and at this time, the seventh capacitor C7 is discharged through the fifth light emitting diode D5, the fourth light emitting diode D4 and the discharge tube inside the second chip U2. In this way, the 5KHZ square wave output of the square wave output end CAP-COUT is realized through the charging and discharging of the second chip U2.
In another embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 4, the stylus connecting circuit 310 includes a first connecting circuit 311 and a second connecting circuit 312, and the first connecting circuit 311 and the second connecting circuit 312 are connected to the measuring chip U3 and the control chip U4.
In another embodiment of the present invention, as shown in fig. 3, the first connection circuit 311 includes a first relay K1, a twenty-fourth resistor R24, a red pen connection terminal J6, a black pen connection terminal J5, an eighth light emitting diode D8, a second triode Q2, and a forty-fourth resistor R40; a third pin of the first relay K1 is connected to a thirteenth pin of the measurement chip U3, a fifth pin of the first relay K1 is connected to the twenty-fourth resistor R24, the other end of the twenty-fourth resistor R24 is connected to the red pen connection terminal J6 and the fourth pin of the first relay K1, the black pen connection terminal J5 is grounded, the anode of the eighth light emitting diode D8 is connected to the eighth pin of the first relay K1 and the collector of the second triode Q2, the cathode of the eighth light emitting diode D8 is connected to the power circuit 100, the emitter of the second triode Q2 is grounded, the base of the second triode Q2 is connected to the forty-th resistor R40, and the other end of the forty-th resistor R40 is connected to the seventh pin of the control chip U4. Specifically, the red pen connecting end J6 is further connected with a measurement red pen, and the black pen connecting end J5 is connected with a measurement black pen. During measurement, the red pen is aligned to the measurement point, the black pen is grounded, and at the moment, the method is consistent with that of measurement by using a universal meter, and the device is convenient to use and convenient to operate.
In another embodiment of the present invention, as shown in fig. 4, the second connection circuit 312 includes a second relay K2, a seventh light emitting diode D7, a third triode Q3 and a forty-first resistor R41, a third pin of the second relay K2 is connected to the square wave output terminal CAP-COUT, a fourth pin of the second relay K2 is connected to one end of the twenty-fourth resistor R24, an anode of the seventh light emitting diode D7 is connected to an eighth pin of the second relay K2 and a collector of the third triode Q3, a cathode of the seventh light emitting diode D7 is connected to the power circuit 100, an emitter of the third triode Q3 is grounded, a base of the third triode Q3 is connected to the forty-first resistor R41, and the other end of the forty-first resistor R41 is connected to the control chip U4. Specifically, in the present embodiment, the first relay K1 and the second relay K2 are both HFD4 in model number.
Further, the utility model discloses can carry out the break-make to the circuit of the bus that has established ties 0.001UF-1UF and measure, like I2S and PCIE. Furthermore, the control chip U4 controls the sixth pin and the seventh pin thereof to output high levels, so that the second triode Q2 and the third triode Q3 are turned on, at this time, the third contact and the fourth contact of the first relay K1 and the second relay K2 are both communicated, the square wave output from the square wave output terminal CAP-COUT can be transmitted to the red pen connection terminal J6, so that the 5KHZ square wave can pass through the tested line, which is obtained through numerous experiments by a person skilled in the art, when the value obtained through post-detection measurement is greater than 1V, the tested line is an open circuit, and when the value obtained through post-detection measurement is less than 0.8V, the tested line is a closed circuit. Therefore, the measurement of the on-off of the line is realized.
In another embodiment of the present invention, as shown in fig. 5, the PC communication circuit 200 includes a USB interface J4 and a serial port conversion chip U5, the sixth pin, the seventh pin and the eighth pin of the USB interface J4 are grounded, the first pin of the USB interface J4 is connected to the sixteenth pin of the serial port conversion chip U5, the third pin of the serial port conversion chip U5 is connected to the eighth pin of the control chip U4, and the second pin of the serial port conversion chip U5 is connected to the ninth pin of the control chip U4. Specifically, the component soldering point electrical parameter acquisition circuit transmits the electrical parameter measured by the measuring chip U3 to the PC terminal through the PC communication circuit. Thus, the measured electrical parameters can be stored in the cloud for subsequent query and statistics by those skilled in the art.
In another embodiment of the present invention, as shown in fig. 6, the power circuit 100 includes a voltage regulator chip U1, a second capacitor C2, a third capacitor C3 and a first light emitting diode D1, a third pin of the voltage regulator chip U1 is connected to the first pin of the USB interface J4, a third pin of the voltage regulator chip U1 is further connected to the anode of the second capacitor C2, the cathode of the second capacitor C2 is connected to the first pin of the voltage regulator chip U1, the first pin of the voltage regulator chip U1 is grounded, the first pin of the voltage regulator chip U1 is further connected to the third capacitor C3, and the other end of the third capacitor C3 is connected to the first light emitting diode D1 after being connected to the second pin and the fourth pin of the voltage regulator chip U1. Specifically, the model of the voltage regulation chip U1 is AMS 1117-3.
In another embodiment of the utility model, as shown in fig. 1, components and parts welding point electrical parameter acquisition circuit still includes gear change over switch S1, gear change over switch S1 ' S one end with control chip U4 ' S third pin is connected, gear change over switch S1 ' S other end ground connection.
In another embodiment of the present invention, as shown in fig. 7, the component soldering point electrical parameter collecting circuit further includes a buzzer circuit 400, the buzzer circuit 400 includes a twenty-third resistor R23, a first triode Q1 and a buzzer LS1, one end of the twenty-third resistor R23 is connected to the seventeenth pin of the control chip U4, the other end of the twenty-third resistor R23 is connected to the base of the first triode Q1, the emitter of the first triode Q1 is grounded, the collector of the first triode Q1 is connected to the buzzer LS1, and the buzzer LS1 is further connected to the power circuit 100.
In another embodiment of the utility model, as shown in fig. 8, component welding point electrical parameter acquisition circuit still includes display circuit 500, display circuit 500 includes display screen J2, display screen J2's first pin with power supply circuit 100 connects, display screen J2's second pin with control chip U4's twentieth pin is connected, display screen J2's third pin with control chip U4's nineteenth pin, display screen J2's fourth pin ground connection.
Further, automatic measurement interface can also be reserved to components and parts welding point electrical parameter acquisition circuit, through outside addition multichannel electronic switch module TP1064, realizes 0-64 way measuring point automatic continuous measurement.
The working principle of the component welding point electrical parameter acquisition circuit of the utility model is as follows;
firstly, after the USB interface J4 is powered on, the control chip U4 controls the eleventh pin and the twelfth pin to have high levels, and at this time, the component soldering point electrical parameter acquisition circuit is in a voltage measurement level. Further, when the gear shift switch S1 is pressed for 3S and then released, the control chip U4 will cyclically switch between four gears of voltage measurement, diode measurement, line on-off measurement, and resistance measurement. When the time for pressing the gear shift switch S1 is 1S, the main control chip U4 will actively send the collected electrical parameter information to the PC.
During the process of measuring the electrical parameters, the main control chip passes through I2The C bus sends data to the display J2, wherein the first row of the display J2 displays: "Voltage measurement", the second line of the display screen J2 shows: "+ 0.000V".
Meanwhile, according to the measurement result, the buzzer LS1 can make different sounds according to preset parameters. Specifically, taking the diode measurement as an example, when the electrical parameter value is measured to be 0-20mv, the buzzer LS1 makes a long sound, when the electrical parameter value is measured to be 20-300mv, the buzzer LS1 makes a short sound, when the electrical parameter value is measured to be 300-900mv, the buzzer LS1 makes a two-sound short sound, and the time of the one-sound short sound is about 0.5 s.
Furthermore, when the voltage is measured, the measurement range of the component welding point electrical parameter acquisition circuit is 0-30V, and the measurement resolution is 0.01V. Then, the master chip U4 parses the measurement data sent by the measurement chip U3 every 100ms through the PC communication circuit, and displays on the display screen J2.
When the voltage is in the measuring gear of the diode, the open-circuit voltage of the red pen is 1.6V, and the measuring range is 0-999 mV. When the open diode is measured, OL is displayed on the display screen J2.
When in the resistance measurement gear, the measurement range is as follows: 0-2M ohm, precision 1%.
To sum up, can understand and be the components and parts welding point electrical parameter acquisition circuit tailors the special chip measuring function of traditional universal meter, realizes the measurement of electrical parameters such as voltage, resistance, diode, circuit break.
Simultaneously, still have the function that traditional universal meter did not possess, promptly: the MCU is used as a control system to realize the use of the measuring chip U3 to carry out electrical parameters, and the PC communication circuit 200 is used to realize the communication and control of PC end upper computer software, so that the technical personnel in the field can realize the computerization of collecting and comparing the electrical parameter data of the welding points of the circuit board. Meanwhile, the measured parameters can be stored and analyzed through the PC communication circuit 200, and a foundation is laid for comparing whether the detection circuit board is normal, judging whether the node has a fault, providing maintenance data and providing a basis in the future.
Therefore, make components and parts welding point electrical parameter acquisition circuit electrical parameter's collection efficiency is high, and can adapt to the electrical parameter acquisition of multiple circuit board, and the commonality is strong, detects with low costs.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A component welding point electrical parameter acquisition circuit comprises a power supply circuit, and is characterized by also comprising a control chip, a PC communication circuit and an electrical parameter measurement circuit which are all connected with the power supply circuit, wherein the PC communication circuit and the electrical parameter measurement circuit are all connected with the control chip; wherein the electrical parameter measurement circuit comprises:
the measurement chip is connected with the control chip;
the meter pen connecting circuit is connected with the measuring chip and the control chip;
the circuit on-off measuring circuit is connected with the meter pen connecting circuit; the control chip controls the measuring chip to enable the measuring chip to measure the electrical parameters of the welding point of the component through the meter pen connecting circuit, and the circuit on-off measuring circuit measures the circuit on the circuit board through the circuit on-off measuring circuit.
2. The circuit for collecting electrical parameters of components and parts welding points according to claim 1, wherein the circuit on-off measuring circuit comprises a second chip, a first inductor, a first resistor, a slide rheostat, a sixth resistor, a fifth light emitting diode, a seventh capacitor, a fourth light emitting diode, a second resistor, a second light emitting diode and a square wave output end; the first inductor, the first resistor, the sliding rheostat and the sixth resistor are sequentially connected, the other end of the sixth resistor is connected with the cathode of the fifth light emitting diode, the anode of the fifth light emitting diode is respectively connected with the seventh capacitor and the cathode of the fourth light emitting diode, the other end of the seventh capacitor is connected with the first pin of the second chip, the first pin of the second chip is grounded, the cathode of the fourth light emitting diode is further connected with the second pin and the sixth pin of the second chip, the anode of the fourth light emitting diode is respectively connected with the sliding rheostat and the seventh pin of the second chip, and the third pin of the second chip is sequentially connected with the second resistor, the second light emitting diode and the square wave output end.
3. The circuit for collecting electrical parameters of components and parts welding points according to claim 2, characterized in that the stylus connecting circuit comprises a first connecting circuit and a second connecting circuit, and the first connecting circuit and the second connecting circuit are both connected with the measuring chip and the control chip.
4. A component soldering point electrical parameter acquisition circuit as claimed in claim 3, wherein the first connection circuit comprises a first relay, a twenty-fourth resistor, a red pen connection terminal, a black pen connection terminal, an eighth led, a second triode and a fortieth resistor; the third pin of the first relay is connected with the thirteenth pin of the measuring chip, the fifth pin of the first relay is connected with the twenty-fourth resistor, the other end of the twenty-fourth resistor is connected with the red pen connecting end and the fourth pin of the first relay respectively, the black pen connecting end is grounded, the anode of the eighth light-emitting diode is connected with the eighth pin of the first relay and the collector of the second triode respectively, the cathode of the eighth light-emitting diode is connected with the power circuit, the emitter of the second triode is grounded, the base of the second triode is connected with the forty-th resistor, and the other end of the forty-th resistor is connected with the seventh pin of the control chip.
5. The circuit for collecting electrical parameters of a component soldering point as claimed in claim 4, wherein the second connection circuit comprises a second relay, a seventh light emitting diode, a third triode and a forty-first resistor, a third pin of the second relay is connected to the square wave output terminal, a fourth pin of the second relay is connected to one end of the twenty-fourth resistor, an anode of the seventh light emitting diode is connected to an eighth pin of the second relay and a collector of the third triode, respectively, a cathode of the seventh light emitting diode is connected to the power circuit, an emitter of the third triode is grounded, a base of the third triode is connected to the forty-first resistor, and the other end of the forty-first resistor is connected to the control chip.
6. The circuit for collecting electrical parameters of component soldering points according to claim 1, wherein the PC communication circuit comprises a USB interface and a serial port conversion chip, a sixth pin, a seventh pin and an eighth pin of the USB interface are grounded, a first pin of the USB interface is connected to a sixteenth pin of the serial port conversion chip, a third pin of the serial port conversion chip is connected to an eighth pin of the control chip, and a second pin of the serial port conversion chip is connected to a ninth pin of the control chip.
7. The circuit for collecting electrical parameters of component soldering points according to claim 6, wherein the power circuit comprises a voltage stabilizing chip, a second capacitor, a third capacitor and a first light emitting diode, a third pin of the voltage stabilizing chip is connected to the first pin of the USB interface, a third pin of the voltage stabilizing chip is further connected to the anode of the second capacitor, a cathode of the second capacitor is connected to the first pin of the voltage stabilizing chip, the first pin of the voltage stabilizing chip is grounded, the first pin of the voltage stabilizing chip is further connected to the third capacitor, and the other end of the third capacitor is connected to the first light emitting diode after being connected to the second pin and the fourth pin of the voltage stabilizing chip.
8. The circuit for collecting electrical parameters of component soldering points as claimed in claim 1, further comprising a gear shift switch, wherein one end of the gear shift switch is connected to the third pin of the control chip, and the other end of the gear shift switch is grounded.
9. The circuit for collecting electrical parameters of components and parts soldering points according to any one of claims 1 to 8, further comprising a buzzer circuit, wherein the buzzer circuit comprises a twenty-third resistor, a first triode and a buzzer, one end of the twenty-third resistor is connected to a seventeenth pin of the control chip, the other end of the twenty-third resistor is connected to a base of the first triode, an emitter of the first triode is grounded, a collector of the first triode is connected to the buzzer, and the buzzer is further connected to the power circuit.
10. The circuit for collecting electrical parameters of component soldering points as claimed in any one of claims 1 to 8, further comprising a display circuit, wherein the display circuit comprises a display screen, a first pin of the display screen is connected to the power circuit, a second pin of the display screen is connected to a twentieth pin of the control chip, a third pin of the display screen is connected to a nineteenth pin of the control chip, and a fourth pin of the display screen is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408414.2U CN210720543U (en) | 2019-08-26 | 2019-08-26 | Component welding point electrical parameter acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408414.2U CN210720543U (en) | 2019-08-26 | 2019-08-26 | Component welding point electrical parameter acquisition circuit |
Publications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114859267A (en) * | 2022-07-06 | 2022-08-05 | 广东科伺智能科技有限公司 | Circuit on-off detection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859267A (en) * | 2022-07-06 | 2022-08-05 | 广东科伺智能科技有限公司 | Circuit on-off detection circuit |
| CN114859267B (en) * | 2022-07-06 | 2022-10-28 | 广东科伺智能科技有限公司 | Circuit on-off detection circuit |
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