CN217484455U - Analog load driving circuit for detecting multi-quality items of electric control board - Google Patents
Analog load driving circuit for detecting multi-quality items of electric control board Download PDFInfo
- Publication number
- CN217484455U CN217484455U CN202221028305.XU CN202221028305U CN217484455U CN 217484455 U CN217484455 U CN 217484455U CN 202221028305 U CN202221028305 U CN 202221028305U CN 217484455 U CN217484455 U CN 217484455U
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal generator
- load
- rectifier
- control board
- 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.)
- Active
Links
- 238000004088 simulation Methods 0.000 claims abstract 2
- 238000001514 detection method Methods 0.000 claims 7
- 230000001105 regulatory effect Effects 0.000 claims 6
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000003068 static effect Effects 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract 1
Images
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a simulation load drive circuit for detecting multi-quality items of an electric control board, which relates to the technical field of circuit board quality inspection and is used for detecting a load output end connected with a load, comprising a rectifier D6, a voltage division unit, a signal generator, a voltage regulation unit and a high-voltage conduction switch, wherein two alternating current power ends of the rectifier D6 are connected with the load in parallel, a positive electrode and a negative electrode of the voltage division unit and a positive electrode and a negative electrode of the signal generator are connected with a direct current output of the rectifier D6 in a serial connection mode, the voltage regulation unit is connected with the positive electrode and the negative electrode of the signal generator in parallel through the high-voltage conduction switch, the positive electrode or the negative electrode of the voltage regulation unit is connected with a regulation conduction end of the high-voltage conduction switch, the positive electrode and the negative electrode of the high-voltage conduction switch are connected with a power supply which is the same as or close to the voltage peak value change of the load output end, so that the response is faster when the voltage regulation unit is applied, thereby avoiding the signal generator from being damaged due to the over-over caused by the untimely two voltage regulation units, and the whole is simpler and the cost is lower.
Description
Technical Field
The utility model relates to an automatically controlled board quality detects technical field, specifically is the analog load drive circuit that automatically controlled board many qualities project detected.
Background
Before the circuit board is applied to a product, the circuit board generally needs to be subjected to quality inspection, that is, the circuit board is tested through a simulation load to confirm whether the function of the circuit board is normal. The heating products generally have a function of stopping heating when reaching a temperature, the circuit of the products has an NTC detection function, and when the products detect that the NTC signal is a certain value, the products stop outputting the load voltage. When quality inspection is carried out, whether the function test of the temperature stop load output is normal or not is simulated through a quality inspection module of quality inspection equipment, namely, the load output end is detected, so that whether the load output voltage peak value of the electric control board can meet the required standard or not is determined, and if a product has defects, the maximum value of the output voltage cannot meet the requirement, so that quality inspection personnel can conveniently confirm whether the electric control board is qualified or not.
Because the waveforms of current and voltage signals of loads of many circuit boards are different in the environments of 120V and 230V, in quality inspection of the circuit boards, it is usually necessary to detect the load output terminals in the environments of 230V (high voltage) load output voltage and 120V (low voltage) load output voltage, respectively, so as to ensure the accuracy of test data. At present, two analog load driving circuits for detecting the multi-quality items of the electronic control board at the output end of the load are usually provided, that is, one of the two analog load driving circuits is used for respectively detecting the output end of the load in a load output voltage environment of 120V (low voltage), and the other one is used for detecting the voltage of the output end of the load in a load output voltage environment of 230V (high voltage). The design has the problem of high cost, and the switching needs to be carried out by adopting a program control switching circuit after the detection circuit detects the signal, so that the signal generator is burnt out due to untimely response.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.
In order to achieve the above object, the utility model provides a following technical scheme: the analog load driving circuit for detecting the multi-quality items of the electric control board is used for detecting a load output end connected with a load and comprises a rectifier D6, a voltage division unit, a signal generator, a voltage regulation unit and a high-voltage conduction switch; the two alternating current power supply ends of the rectifier D6 are connected in parallel with the load; the positive pole and the negative pole of the voltage division unit and the positive pole and the negative pole of the signal generator are connected with the direct current output positive pole and the direct current output negative pole of the rectifier D6 in a serial connection mode; the signal generating end of the signal generator is used for generating a low level signal/generating a high level signal; the voltage regulating unit is connected in parallel to the positive electrode and the negative electrode of the signal generator through the high-voltage conducting switch, the positive electrode or the negative electrode of the voltage regulating unit is connected with the regulating conducting end of the high-voltage conducting switch, and the high-voltage conducting switch is used for controlling the voltage regulating unit to be connected in parallel with the positive electrode and the negative electrode of the signal generator/controlling the voltage regulating unit to be connected in parallel with the positive electrode and the negative electrode of the signal generator; the positive pole and the negative pole of the high-voltage conducting switch are connected with a power supply which is the same as or close to the voltage peak value change of the load output end.
As a further aspect of the utility model: the rectifier D6 employs a bridge rectifier.
As a further aspect of the utility model: the load comprises a light bulb.
As a further aspect of the utility model: the voltage divider unit includes a resistor R39 in series with the signal generator.
As a further aspect of the utility model: the high-voltage conducting switch comprises a relay K3, two ends of a coil of the relay K3 are connected to a power supply which is the same as or close to the voltage peak value change of a load output end, and a voltage regulating unit is connected with a normally open fixed contact or a movable contact of the same group of contact groups on the relay K3.
As a further aspect of the utility model: the voltage dividing unit includes a resistor R41.
As a further aspect of the utility model: the signal generator comprises a photoelectric coupler U8, and a light receiver of the photoelectric coupler U8 is correspondingly used for generating a low level signal/generating a high level signal.
Compared with the prior art, the beneficial effects of the utility model are as follows: when the load output end outputs low voltage, the high-voltage conduction switch controls the voltage regulating unit to be connected with the positive electrode and the negative electrode of the signal generator in parallel and disconnected, so that the signal generator can obtain high voltage proportion when the load output end outputs low voltage, and can generate signals; when the load output end outputs high voltage, the high-voltage conduction switch controls the voltage regulation unit to be connected with the positive pole and the negative pole of the signal generator in parallel, so that the signal generator can obtain low voltage proportion when the load output end outputs high voltage, on the premise of meeting the requirement of generating signals, the voltage finally applied to the signal generator cannot be too large to damage the signal generator, the design ensures that the high-voltage conduction switch is positive, the negative pole is connected on a power supply which is the same as or close to the voltage peak value change of the load output end, the response is quicker when the voltage regulation unit is applied, the phenomenon that the signal generator is damaged due to too large voltage caused by untimely switching of the voltage regulation unit is avoided, the whole structure is simpler, and the cost is lower.
Drawings
Fig. 1 is a circuit frame diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention;
the reference numerals and names in the figures are as follows:
the device comprises a voltage division unit-100, a signal generator-200, a voltage regulation unit-300, a high-voltage conducting switch-400, a load-500 and a signal acquisition chip-600.
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.
The high voltage and the low voltage described throughout indicate that a voltage difference exists between the two, and taking 170V as an example, the high voltage is higher than 170V, the low voltage is lower than 170V, the common high voltage values are 220V and 230V, and the common low voltage values are 110V and 120V.
Referring to fig. 1-2, the present invention provides a simulation load driving circuit for testing multi-quality items of an electric control board, which is used for testing a load output terminal (PTC1-2-I, PTC1-2-O) connected with a load 500, and comprises a rectifier D6, a voltage dividing unit 100, a signal generator 200, a voltage regulating unit 300 and a high voltage conducting switch 400.
Two AC power terminals (AC1, AC2) of the rectifier D6 are connected in parallel with the load 200 for rectifying the AC power applied to the rectifier D6 at the output terminal of the load into dc power for the voltage dividing unit 100, the signal generator 200 and the voltage regulating unit 300.
The positive and negative electrodes of the voltage dividing unit 100 and the positive and negative electrodes of the signal generator 200 are connected in series to the positive and negative electrodes (V +, V-) of the dc output of the rectifier D6, and the voltage dividing unit 100 is configured to divide the voltage applied to the signal generator 200 after the load output terminal is rectified by the rectifier D6.
The signal generating terminal of the signal generator 200 is used for generating a low level signal/generating a high level signal, so that the signal acquisition chip 600 (or the signal acquisition board, or the signal acquisition module, or the signal acquisition device) for receiving the signal can perform detection and confirmation.
The voltage regulating unit 300 is connected in parallel to the positive electrode and the negative electrode of the signal generator 200 through the high voltage conducting switch 400, the positive electrode or the negative electrode of the voltage regulating unit 300 is connected with the regulating conducting end of the high voltage conducting switch 400, the high voltage conducting switch 400 is used for controlling the voltage regulating unit 300 and the positive electrode and the negative electrode of the signal generator 200 to be connected in parallel or controlling the voltage regulating unit 300 and the positive electrode and the negative electrode of the signal generator 200 to be disconnected in parallel, and the positive electrode and the negative electrode of the high voltage conducting switch 400 are connected to a power supply which is the same as or close to the voltage peak value change of a load output end. The voltage peak change is represented as the highest voltage of the voltage output by the load output end after being rectified by the rectifier D6, that is, when the highest voltage output by the load output end is a high voltage, the voltage applied by the power supply connected to the positive electrode and the negative electrode of the high voltage conduction switch 400 is also the high voltage; when the highest voltage output from the load output terminal is a low voltage, the voltage applied by the power supply connected to the positive and negative electrodes of the high voltage on-switch 400 is also changed to a low voltage. The high voltage outputted from the power supply applied to the high voltage conducting switch 400 can cause the high voltage conducting switch 400 to operate, that is, when the high voltage conducting switch 400 is supplied with the high voltage, the high voltage conducting switch 400 can control the voltage regulating unit 300 to be connected in parallel with the positive electrode and the negative electrode of the signal generator 200.
Its realization mode has a variety, includes: when the high-voltage conduction switch adopts a component capable of working in an alternating current state, the positive electrode and the negative electrode of the high-voltage conduction switch can be directly connected to two ends of a load or connected to an alternating current power supply with the same or similar voltage peak value change of the output end of the load; when the high-voltage conduction switch adopts a component which can work in a direct current state, the positive pole and the negative pole of the high-voltage conduction switch can be finally connected with the positive pole and the negative pole of the direct current output of the rectifier, or at least connected to the two ends of the load through the rectifier, or connected to an alternating current power supply which is the same as or close to the voltage peak value change of the output end of the load through the rectifier, or connected to a direct current power supply which is the same as or close to the voltage peak value change of the output end of the load.
When the load output end outputs high voltage, the voltages applied to the positive and negative electrodes of the high-voltage conducting switch 400 are changed into high voltage, so that the high-voltage conducting switch 400 correspondingly controls the voltage regulating unit 300 to be connected in parallel with the positive and negative electrodes of the signal generator 200, and the equivalent resistance obtained after the signal generator 200 is connected in parallel with the voltage regulating unit 300 is smaller than the resistance of the signal generator 200 not connected in parallel with the voltage regulating unit 300, therefore, after the signal generator 200 is connected in parallel with the voltage regulating unit 300, the proportion of the voltage which is finally applied to the signal generator 200 after the load output end is rectified by the rectifier D6 is reduced before. That is, when the load output end outputs a low voltage, the high voltage conducting switch 400 controls the voltage regulating unit 300 and the positive and negative electrodes of the signal generator 200 to be disconnected in parallel, so that the signal generator 200 can obtain a high voltage ratio when the load output end outputs a low voltage, and can generate a signal; when the load output end outputs high voltage, the high-voltage switch-on switch 400 is used for controlling the voltage regulating unit 300 and the signal generator 200 to be connected in parallel, and the negative pole of the voltage regulating unit is connected in parallel, so that the signal generator 200 can obtain low voltage proportion when the load output end outputs high voltage, on the premise that signals can be generated, the voltage finally applied to the signal generator 200 cannot be too large to damage the signal generator 200, the design enables the high-voltage switch-on switch 400 to be connected to a power supply which is the same as or close to the voltage peak value change of the load output end, so that the response is faster when the voltage regulating unit 300 is applied, the situation that the voltage of the signal generator 200 is too large to damage due to the fact that the voltage regulating unit 300 is not switched in time is avoided, the whole is simpler, and the cost is lower.
Referring to fig. 2, in the embodiment of the present invention, the rectifier D6 is a bridge rectifier. The load 500 includes a light bulb. The voltage divider unit includes a resistor R39 in series with the signal generator. The high-voltage conduction switch comprises a relay K3, two ends of a coil of the relay K3 are connected to a power supply which is the same as or close to the voltage peak value change of a load output end, and a voltage regulating unit is connected with a normally open static contact PTC2-G or a movable contact PTC2-240 of the same group of contacts on the relay K3. The voltage dividing unit includes a resistor R41. The signal generator comprises a photoelectric coupler U8, and a light receiver of the photoelectric coupler U8 is correspondingly used for generating a low level signal/generating a high level signal.
Adopting a high-power bulb to simulate the heating element load of a product, and when starting testing, the default of input voltage is in a 120V mode: at the moment, the coil of the relay K3 of 230V cannot be attracted, and the resistor R41 is disconnected with the photocoupler U8 in parallel; the load output end of the tested circuit board applies voltage to the bulb, the voltage at the two ends of the bulb is divided by the resistor R39 after passing through the rectifier D6, when the voltage waveform received by the illuminator of the photoelectric coupler U8 is close to the peak value, the photoelectric coupler U8 is conducted, the signal acquisition chip detects a pulled-up high-level signal through the signal output end, during testing, the signal detection chip can detect a square wave signal with high-low level change, the load output voltage of the circuit board is detected and judged to be normal, and therefore the peak value of the load output voltage of the circuit board can be confirmed to meet the required standard; if the load output voltage peak value of the circuit board passes through the rectifier D6, the voltage finally applied to the light emitter of the photoelectric coupler U8 cannot enable the photoelectric coupler U8 to be conducted, the signal detected by the signal acquisition chip is always kept at a high level, the circuit board can be judged to be a defective product when the test is finished or the test time is reached, and the overall detection is more convenient and reasonable.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The simulation load driving circuit for multi-quality item detection of the electric control board is used for detecting a load output end connected with a load, and is characterized by comprising a rectifier D6, a voltage division unit, a signal generator, a voltage regulation unit and a high-voltage conduction switch;
the two alternating current power supply ends of the rectifier D6 are connected in parallel with the load;
the positive pole and the negative pole of the voltage division unit and the positive pole and the negative pole of the signal generator are connected with the direct current output positive pole and the direct current output negative pole of the rectifier D6 in a serial connection mode;
the signal generating end of the signal generator is used for generating a low level signal/generating a high level signal;
the voltage regulating unit is connected in parallel to the positive electrode and the negative electrode of the signal generator through the high-voltage conducting switch, the positive electrode or the negative electrode of the voltage regulating unit is connected with the regulating conducting end of the high-voltage conducting switch, and the high-voltage conducting switch is used for controlling the voltage regulating unit to be connected in parallel with the positive electrode and the negative electrode of the signal generator or controlling the voltage regulating unit to be connected in parallel with the positive electrode and the negative electrode of the signal generator;
the positive pole and the negative pole of the high-voltage conducting switch are connected with a power supply which is the same as or close to the voltage peak value change of the load output end.
2. The electric control board multi-quality item detection analog load driving circuit according to claim 1, wherein the rectifier D6 is a bridge rectifier.
3. An analog load driving circuit for multi-item detection of an electronic control panel according to claim 1, wherein the load comprises a light bulb.
4. An analog load driving circuit for multi-item detection of an electric control board according to any one of claims 1-3, wherein the voltage dividing unit comprises a resistor R39 connected in series with the signal generator.
5. An analog load driving circuit for multi-quality item detection of an electric control board according to any one of claims 1-3, characterized in that the high-voltage conducting switch comprises a relay K3, two ends of a coil of the relay K3 are connected to a power supply which is the same as or close to the voltage peak value change of the load output end, and the voltage regulating unit is connected with a normally open static contact or a movable contact of the same group of contacts on the relay K3.
6. The electric control board multi-quality item detection analog load driving circuit according to any one of claims 1-3, wherein the voltage dividing unit comprises a resistor R41.
7. The electric control board multi-quality item detection analog load driving circuit according to any one of claims 1-3, wherein the signal generator comprises a photoelectric coupler U8, and a light receiver of the photoelectric coupler U8 is correspondingly used for generating a low level signal/generating a high level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221028305.XU CN217484455U (en) | 2022-04-28 | 2022-04-28 | Analog load driving circuit for detecting multi-quality items of electric control board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221028305.XU CN217484455U (en) | 2022-04-28 | 2022-04-28 | Analog load driving circuit for detecting multi-quality items of electric control board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217484455U true CN217484455U (en) | 2022-09-23 |
Family
ID=83309495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221028305.XU Active CN217484455U (en) | 2022-04-28 | 2022-04-28 | Analog load driving circuit for detecting multi-quality items of electric control board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217484455U (en) |
-
2022
- 2022-04-28 CN CN202221028305.XU patent/CN217484455U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4434401A (en) | Apparatus for testing semiconductor devices and capacitors | |
| JPH0928084A (en) | Linked inverter having solar battery output inspection function and inspection method | |
| CN102967789B (en) | High voltage test method and equipment with quick detection of contact loop | |
| CN110673054B (en) | DC/DC power supply test system and aging test method of DC/DC power supply | |
| CN217484455U (en) | Analog load driving circuit for detecting multi-quality items of electric control board | |
| CN114062787B (en) | Electrical loop circuit quality detecting device | |
| CN1908680A (en) | Surging current detecting circuit | |
| CN111596139B (en) | Ground impedance anomaly detection circuit | |
| CN210923778U (en) | Equipment fault test switching circuit | |
| CN115856618B (en) | Low-voltage switch equipment short circuit test device and method based on energy storage power supply | |
| CN217008030U (en) | Intelligent general relay calibration equipment | |
| CN213903774U (en) | Electric energy meter reliability test device | |
| CN217484454U (en) | Circuit for automatically discriminating input voltage for quality inspection of electric control board | |
| CN102129043A (en) | Method and device for testing dynamic characteristic of inverter welding machine | |
| CN212569074U (en) | Comprehensive test aging platform for switching power supply | |
| CN219695342U (en) | Multichannel coil ageing test system | |
| CN218481592U (en) | Detector for detecting fan set line position | |
| CN218181341U (en) | Burn-in stand controller device | |
| CN207301784U (en) | A kind of electrical energy power quality disturbance tolerance level test system of programmable logic controller (PLC) | |
| CN220584322U (en) | Low-voltage contactor testing device | |
| CN219496518U (en) | Zero-crossing detection circuit and device | |
| CN219891375U (en) | Small electromagnetic relay contact detection device | |
| CN220961727U (en) | Working condition simulation test device based on electronic and electric products | |
| CN217060815U (en) | Connection and disconnection control loop and control box based on PLC and touch screen | |
| CN217931911U (en) | Fault detection system for thyristor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |