CN2766245Y

CN2766245Y - Multifunctional current detecting device

Info

Publication number: CN2766245Y
Application number: CN 200520068706
Authority: CN
Inventors: 杨振; 夏建中
Original assignee: YANGZHOU SHUANGHONG ELECTRONICS CO Ltd
Current assignee: YANGZHOU SHUANGHONG ELECTRONICS CO Ltd
Priority date: 2005-01-25
Filing date: 2005-01-25
Publication date: 2006-03-22
Anticipated expiration: 2015-01-25

Abstract

The utility model provides a multifunction current detecting device, and relates to the technical field current detection, particularly to a multifunction current detecting device. Under the support of related software, the utility model detects the output current of a power supply in real time in the way that the multifunction current detecting device is provided with a current detecting circuit and a signal processing control circuit using a single chip computer as a core on an output end of a voltage-stabilizing constant current power supply. When the output current exceeds the set high limit or is lower the set lower limit, the utility model carries out acoustic-optic alarm by setting the high limit and the lower limit of the output current, and the power supply is switched off to ensure the detection safety. The alarm momentary current is locked on a display, a delay circuit is arranged and can avoid false operations when a computer is powered on, and the judgment after delay time is realized. The set high limit and the set lower limit of the current and the datum of the delay time can be stored during power failure, and do not need to be arranged once more. The utility model is in favorable for automatic detection, improves the production efficiency and the detecting quality, and is suitable for detecting correlation technique parameters of electric appliances, such as the motor, etc., and electronic elements, such as a capacitor, etc.

Description

The multifunction electric flow detection device

Technical field

The utility model relates to the electric current test technology field, relates in particular to a kind of multifunction electric flow detection device.

Background technology

Existing power-supply device is when doing electronic components tests such as electric equipment products such as motor or electric capacity, voltage dependent resistor (VDR), can only be single output voltage and output current be provided, when thereby test product causes electric current to rise rapidly owing to self character breaks down or descend not in the normal current workspace rapidly, power-supply device itself can not be made any reaction, at this moment can only judge by people's range estimation whether this measured object breaks down, and more impossible range estimation by the people judges how many immediate currents that breaks down is.

Goal of the invention

The purpose of this utility model is can only provide single output voltage and output current at existing power supply equipment, can't be when test product breaks down, reflect deficiencies such as moment output current value in real time, provide and to detect output current in real time, report to the police rapidly, cut off the electricity supply during at the test product electric current, and accurately reflect a kind of multifunction electric flow detection device of instant of failure current value not in the operate as normal district.

The purpose of this utility model is achieved through the following technical solutions; a kind of multifunction electric flow detection device; comprise housing; in the housing by the transformation current rectifying and wave filtering circuit; the voltage stabilization and current stabilization control circuit; the current regulator power supply that holding circuit and output interface constitute; characteristics are to seal in current sampling circuit in the current regulator power supply output major loop; the filter amplification circuit of the output of current sampling circuit through being provided with; it is the signal Processing of core that the A/D change-over circuit inserts with the single-chip microcomputer; report to the police; be used to set the keyboard of electric current bound and delay time etc.; circuit such as control circuit and display, the output of control circuit connects the current regulator power supply end.

The utility model is provided with current detection circuit by the output terminal at current regulator power supply and is the signal Processing of core with the single-chip microcomputer, control circuit, under the support of related software, realized real-time detection to electric power outputting current, by the upper lower limit value of output current is set, realize surpassing the upper limit that sets or being lower than sound and light alarm prompting in limited time down when output current, the output of cutting off the electricity supply, guarantee test safety, and the momentary current will report to the police the time is locked on the display, by delay circuit is set, misoperation in the time of can avoiding starting shooting, realize time-delay judgement more later, preservations of can cutting off the power supply of electric current bound of setting and delay time data need not reset after starting shooting once more.The utility model helps automatic test, enhances productivity conscientiously and test mass, is applicable to the test of the correlation technique parameter of electronic components such as electric equipment products such as motor and electric capacity.

Description of drawings

Fig. 1 is the utility model circuit block diagram;

Fig. 2 is the circuit diagram of the utility model embodiment;

Among the figure, the 1st, current regulator power supply, the 2nd, sample circuit, the 3rd, filter amplification circuit, the 4th, A/D change-over circuit, the 5th, single-chip microcomputer, the 6th, control circuit, the 7th, warning circuit, the 8th, keyboard, the 9th, display.Resistance R ₁～R ₄, capacitor C ₁～C ₂, triode Q ₁, light emitting diode L ₁, hummer SPK ₁, button PB ₁～PB ₆, voltage stabilization and current stabilization output terminal UO ⁺, UO ^-, DC source end V _CC, interface PZ ₁, integrated circuit (IC) ₁～IC ₃

Embodiment

Further specify the utility model in conjunction with the accompanying drawings and embodiments, the utility model comprises housing, in the housing by the transformation current rectifying and wave filtering circuit, the voltage stabilization and current stabilization control circuit, the current regulator power supply 1 that holding circuit and output interface constitute, seal in current sampling circuit 2 in the output major loop of current regulator power supply 1, the output of current sampling circuit 2 is through filter amplification circuit 3, A/D change-over circuit 4 and single-chip microcomputer 5 constitute, single-chip microcomputer 5 adopts the P89LPC932 chip, this chip internal contains EEPROM, can preserve important parameters when outage and can not lose, single-chip microcomputer 5 is connected with keyboard 8, display 9, sound light alarming circuit 7 and control circuit 6; PB in display 9 and the keyboard 8 ₁～PB ₆Key layout is at the panel position of housing; PB ₁Be function key, function key is used for selecting to be provided with upper current limit value, lower current limit value, detects delay time parameter PB ₂～PB ₆Be respectively rise, reduce, move to left, operation, reset key, when revising parameter, press PB ₂Key can make the flicker bit add 1, presses PB ₃Key can make the flicker bit subtract 1, presses PB ₄1 of the changeable current setting lt of key, configure parameter after, press PB ₅Keyed jointing leads to load, after reporting to the police, presses PB ₆Key can be removed warning and voltage stabilization and current stabilization electric current 1 is ready; Sound light alarming circuit 7 is by resistance R ₂, R ₃, triode Q ₁, hummer SPK ₁With light emitting diode L ₁Constitute hummer SPK ₁Be acoustic alarm, light emitting diode L ₁For light is reported to the police hummer SPK ₁With light emitting diode L ₁Be arranged in the panel position of housing; Current sampling circuit 2 is the shunt resistance R with 0.01 Ω 60A600mv of manganese-copper filament making ₁, it converts current signal to the voltage signal of adaptive A/D change-over circuit; Filter amplification circuit 3 is by capacitor C ₁, C ₂And integrated circuit (IC) ₁Constitute integrated circuit (IC) ₁Can be amplifying circuit LM471, capacitor C ₁And C ₂With high frequency in the signal and power frequency interference filtering, circuit is connected to the form of voltage follower, and enlargement factor is 1, and the reinforcing band load capacity increases input resistance simultaneously, reduces the influence to signal source; A/D change-over circuit 4 is by integrated circuit (IC) ₂Form integrated circuit (IC) ₂Can adopt MAX1247, the digital signal of its output inserts integrated circuit (IC) ₃The single-chip microcomputer of forming 5 carries out digital processing, the electric current upper lower limit value that process and keyboard 8 are set relatively, if the electric current that records is greater than the upper limit or less than lower limit, think that then electric current transfinites, single-chip microcomputer 5 drives warning circuit 7, simultaneously the control circuit that constitutes via pilot relay disconnects it and is serially connected in contact in the voltage stabilization and current stabilization electric current output major loop, disconnects output, and numerical value is locked on the display.

Claims

1, a kind of multifunction electric flow detection device; comprise the current regulator power supply that constitutes by transformation current rectifying and wave filtering circuit, voltage stabilization and current stabilization control circuit, holding circuit and output interface in housing, the housing; it is characterized in that sealing in current sampling circuit in the current regulator power supply output major loop; the output of current sampling circuit is through the filter amplification circuit of setting, the signal Processing that the access of A/D change-over circuit with the single-chip microcomputer is core, keyboard, control circuit and the display circuit of reporting to the police, be used to set electric current bound and delay time, and the output of control circuit connects the current regulator power supply end.

2, multifunction electric flow detection device according to claim 1 is characterized in that current sampling circuit is the shunt resistance with the big electric current of low resistance of manganese-copper filament making.

3, multifunction electric flow detection device according to claim 1 is characterized in that single-chip microcomputer adopts the P89LPC932 chip that includes EEPROM.

4, multifunction electric flow detection device according to claim 1, it is characterized in that keyboard is 2 * 3 membrane keyboards, membrane keyboard is arranged in the panel position of housing, has function key in the membrane keyboard, function key is used for selecting to be provided with upper current limit value, lower current limit value, detecting the delay time parameter, also has rise in the membrane keyboard, reduces, moves to left, operation, reset key.

5, multifunction electric flow detection device according to claim 1 is characterized in that warning circuit is by resistance R ₂, R ₃, triode Q ₁, hummer SPK ₁With light emitting diode L ₁Form hummer SPK ₁With light emitting diode L ₁Be arranged in the panel position of housing.

6, multifunction electric flow detection device according to claim 1 is characterized in that control circuit is made of pilot relay, and the contact of pilot relay is serially connected in the current regulator power supply output major loop.