TWI384238B - Relay measurement system - Google Patents

Description

Relay measuring system

The invention relates to a "relay measuring system", which is provided with a relay driving circuit, a no-load contact closing/open circuit detecting circuit, a load contact closing/open circuit detecting circuit, and a relay coil breaking detecting circuit. The circuit board of the current/voltage sensing circuit is combined with a personal computer with a data acquisition card, a measurement program and a human-machine interface to form a multi-measurement project capable of integrating relays in a single measurement system design. Assist enterprises to reduce costs and expenditures under existing resources, and complete the specification measurement of relays to enhance the competitiveness of manufacturers' technologies and products.

According to the general requirements, the relays are required to indicate the electrical and mechanical characteristics of the relay. However, small enterprises cannot set up a large testing laboratory to detect the relay specifications, so they can only be sent to public or private testing centers. Inspection requires additional inspection costs, resulting in higher cost of the enterprise, but the need to purchase instruments that can measure relays or mechanical specifications on the market, but the instruments currently on the market are not only expensive but mostly single items. It is not only impractical for small enterprises to cause loss of enterprise costs, but also to effectively enhance their competitiveness in a harsh competitive environment.

Further, according to the "Measurement Device for Testing Relays" of Taiwan Patent Publication No. I249174, the system includes: a power supply group, a signal generator, and a signal waveform measuring device, which are connected to one end of the power supply group. The voltage signal and one of the coils of the relay form a first end point, the signal generator generates an input The signal forms a second end point to the coil, so that the signal waveform measuring device can obtain the waveform input by the second end of the coil to determine whether the relay is normal, but the above function is only used to test whether the relay is good or not Meet the specifications, did not detect the relevant data, still does not meet the needs of small businesses.

The present inventors have continually tested the process methods and products in the spirit of creation, in the spirit of creation, and in the creation of methods and installation methods. Through numerous experiments and years of experience, the present invention has been improved. The present invention has been further proposed.

The main object of the present invention is to provide a relay measuring system, which is provided with a relay driving circuit, a no-load contact closing/open circuit detecting circuit, and a load contact closing/open circuit detecting on a circuit board. The circuit and a relay coil open circuit detection circuit are integrated with a personal computer with a data acquisition card, a measurement program and a human-machine interface to integrate a relay for measuring mechanical life, electrical life, power-on or release. The measurement system of voltage, start-up or release time and contact voltage drop or power-resistance, etc., can effectively reduce the huge inspection cost and inspection time required for traditional relay measurement, thereby enhancing the competition of the company's products. force.

A secondary object of the present invention is to provide a relay measuring system which utilizes the design of the circuit board and the program so that the relay to be tested can simultaneously measure under the condition of no load when measuring the life of the mechanical (contact). 5, can measure 2 at the same time under load conditions to improve efficiency and achieve optimal use.

In the following, the preferred embodiment of the present invention will be described in detail with reference to the drawings: the first figure is a system architecture diagram of the present invention, which is mainly based on an electric The circuit board (10) is respectively provided with a relay driving circuit (11), a no-load contact closing/opening detecting circuit (12), a load contact closing/open circuit detecting circuit (13), and a relay coil breaking circuit. The detection circuit (14) and a current/voltage sensing circuit (16) of the Hall current sensing element are connected to a contact of the relay to be tested (20) and a data capture card (30) and The personal computer (40) of the LaBVIEW software cooperates with the setting of the measurement program and the human machine interface (41) to form a control loop for performing the mechanical life, electrical life, and power-on voltage of the relay (20) to be tested. The voltage release, power-on time/release time, and contact voltage drop/resistance measurement are measured so that the measured data can be calculated by the data acquisition card (30) and the personal computer (40) measurement program. Displayed on a human-machine interface (41), wherein the human-machine interface (41, as shown in the second figure) displayed by the personal computer (40) is provided with mechanical life measurement from left to right and from top to bottom. 411), electrical life measurement (412), power-on voltage measurement (413), release voltage measurement (414), power-on time measurement (415), release time measurement ( 416), contact voltage drop / resistance measurement (417) and other measurement items, all the measurement items have a light display (418), when the light display (418) is on, it indicates that the measurement item is carried out In the middle, the measurement is completed, and at the upper right, there is a pull-down menu (401), a start button (402), a start measurement signal (403), and a measurement completion lamp for selecting a measurement item. No. (404) for operation.

The following describes the mechanical life, electrical life, starting voltage, release voltage, starting time, release time, contact voltage drop and electrical resistance of the relay to be tested (20) as follows:

The mechanical life of the relay refers to the number of times the mechanical contacts can be switched under no-load and load conditions, regardless of the mechanical contact of the relay, which is unloaded/loaded, as long as the relay coil is in the excited state and the a contact is open or When the relay coil is in the demagnetized state and the a contact is closed, any condition occurs, that is, it is determined that the mechanical contact has failed. With this principle, the present invention uses the relay circuit of the circuit board (10, please refer to the third figure at the same time) (11) ), the no-load contact closure/open circuit detection circuit (12) and the load contact closure/open circuit detection circuit (13) combined with the data capture card (30) DI/DO (Digital Output/Digital Input) In order to achieve the mechanical life measurement, the data can be extracted by the DO point of the data capture card (30, please refer to the fourth figure) to control the power-on/release of the relay (20) to be tested, and the DO point is sent out. "On-Off" cycle signal, the open/closed contact of the relay (20) to be tested is then passed through the no-load contact closure/open circuit detection circuit (12) and the load contact closure/open circuit detection circuit (13) Send to the data capture card (30) DI point, the signal of this DI point represents the open/closed state of the relay (20) to be tested, this signal will be sent to the counter of the data capture card (30) to count the contact closure The number of times (opening and closing of the contact of the relay to be tested (20) for one on-off cycle (On-Off Cycle) produces a calculated value plus one According to the accumulation), when the control signal sent by the data capture card (30) does not match the signal read by the presence/absence of the contact closure/open circuit detection circuit (12), the relay to be tested is determined. (20) The contact has been faulted and the accumulated data measured by the data capture card (30) is displayed on the mechanical life measurement (411) field of the human machine interface (41) and the light is turned off after the archive is completed. The number is displayed (418) to end the measurement of the mechanical life of the relay (20) to be tested, and the measurement is performed regardless of whether the loaded mechanical life measurement or the unloaded mechanical life measurement (ie, whether the contact passes the load current) The method is the same as the above, the difference is only by connecting another load point of the data capture card (30) to a load switching circuit (15) to control whether the contact to be tested (20) is connected to the load. Loop.

The electrical life determination method of the relay means that the relay coil can withstand Number of start/stop times, when the DO point is sent to logic 0 and the relay coil is not energized or the DO point is sent to logic 1 and the relay coil is not in the demagnetized state, it is determined that the relay coil is damaged. According to this principle, the present invention uses the circuit The relay coil breaking detection circuit (14) and the relay driving circuit (11) of the board (10, please refer to the fifth figure at the same time) are combined with the DI/DO point of the data acquisition card (30) to achieve the electrical life measurement. The logic 0/1 can be sent from the DO point of the data capture card (30, please refer to the sixth figure at the same time) to control the excitation/closing of the coil (20) to be tested, and the excitation/demagnetization of the coil is then broken through the relay coil. After the detection circuit (14) detects, it is sent to the DI point of the data acquisition card (30), and the signal of the DI point represents whether the coil of the relay to be tested (20) is energized or not, and the signal is retrieved via the data acquisition card (30). The counter counts the number of times of opening and closing, that is, the life of the appliance (the data is calculated by adding one calculated value plus one for the on-off cycle of the coil of the relay to be tested (20)), and the data is collected. (30) The control signal and relay coil are sent off When the signal read by the detecting circuit (14) does not match, it is determined that the coil of the relay to be tested (20) has failed and the accumulated data measured by the data capture card (30) is displayed on the human-machine interface ( 41) On the electrical life measurement (412) field and after archiving, the light display (418) is turned off to end the measurement of the electrical life of the relay (20) to be tested.

The power-on/release voltage of the relay is the lowest voltage value that will cause the relay coil to be excited/the lowest voltage value that will de-energize the relay coil. The voltage is applied to the relay coil by decreasing from large to small and increasing from small to large. Until the relay coil is excited/demagnetized, the voltage increase/decrease is stopped, and the voltage value at this time is determined as the electrification voltage/release voltage. With this principle, the present invention uses the circuit board (10, please refer to the seventh figure at the same time). Relay coil disconnection detection circuit (14) and relay drive circuit (11) and data capture card (30) DO (PWM signal No. output /DI combined to achieve the relay power-on/release voltage measurement, and the pulse width modulation (PWM) signal can be sent by the DO point of the data capture card (30, please refer to the eighth figure at the same time), and sent out. The larger the duty cycle of the pulse wave, the larger the average voltage applied to the two ends of the relay coil, and the signal of the excitation/demagnetization of the relay coil is then sent to the data acquisition card via the relay coil detection circuit (14). The DI point, the signal of the DI point means that the relay coil is energized or not, and the DI point is scanned continuously, so that the correct power-on voltage or voltage can be determined at the correct time point and the data can be retrieved through the data (30) The measured data is displayed on the field of the power-on voltage measurement (413) or the release voltage measurement (414) of the human-machine interface (41) and after the file is archived, the indicator display (418) is automatically turned off and ends. The measurement of the power-on/release voltage of the relay (20) to be tested.

The power-on/release time of the relay refers to the time when the relay drive circuit pushes the relay to the first closing/opening of the contact. When a logic 0/1 is input to the relay drive circuit to activate/de-energize the relay coil, the timing is simultaneously started. The timer starts counting. When the contact of the relay is closed/opened for the first time, the timer is stopped. At this time, the timing value is determined as the power-on/release time. With this principle, the present invention uses the circuit board (10, please Referring to the ninth figure), the relay mechanical contact open/close detection circuit and the relay drive circuit (11) are combined with the DI/DO point of the data capture card (30) to achieve the relay power-on/release time measurement, but By using the data capture card (30, please refer to the tenth figure at the same time), the logic point 0/1 is sent to control the coil (20) coil excitation/demagnetization, and the timer is started immediately after the control signal is sent. The excitation/demagnetization state of the relay to be tested (20) is then sent to the DI point of the data capture card (30) via the relay mechanical contact open/close detection circuit, and the timed value is deducted from the delay of the electronic circuit. Time is when the power is turned on. / Release time and transmitted through the data acquisition card (30) obtained from the measured data is displayed on the display unit After the power-on time measurement (415) or release time measurement (416) of the interface (41) is on the field and after archiving, the light indicator display (418) automatically closes to end the power-on/release time of the relay (20) to be tested. Measurement.

The contact voltage drop refers to the voltage measured at the contact of the relay to be tested when the relay contact is closed at the rated current, and the contact resistance is the division value of the contact voltage drop and the current flowing through the contact. When the relay contact is closed, the voltage drop will be generated due to the resistance of the contact itself, and then divided by the current value measured by the Hall current sensing element. The voltage and resistance value at this time are determined as the contact point. Voltage and contact resistance. Using this principle, the present invention has a load contact closure/open circuit detection circuit (13), a relay drive circuit (11) and a Hall current sensing element for a circuit board (10, please also refer to FIG. 11). The current/voltage sensing circuit (16) is combined with the AI/DO point of the data capture card (30) to achieve the contact voltage drop/electrical resistance measurement, and the data can be captured by the data (30, please Referring to the DO point of the twelfth figure), the signal of logic 1 is sent, so that the relay (20) to be tested is excited and the contact is closed. At this time, the operator is allowed to adjust the power supply voltage or the load resistance value until the contact current of the relay (20) to be tested is measured. For the rated current, the voltage and current values are read through the AI point channel of the current sensing component and the data capture card (30), and the measured voltage drop value is measured through the data capture card (30). The point resistance value is displayed on the contact voltage drop/resistance resistance measurement (417) field of the man-machine interface (41) and after the file is archived, the light indicator display (418) is automatically turned off to end the relay to be tested (20). Point pressure drop / resistance measurement.

In summary, when the invention is industrially usable and progressive, and the invention is not found in any publication, it is also novel, and when it complies with the provisions of Articles 21 and 22 of the Patent Law, To file an application for a patent for invention, please ask your reviewer to pay for the patent as a prayer.

Only the above is only the preferred embodiment of the present invention. The scope of the present invention is not limited thereto; that is, the equivalent variations and modifications of the scope of the present invention should still be within the scope of the present invention.

10‧‧‧ boards

11‧‧‧Relay drive circuit

12‧‧‧No load contact closure/open circuit detection circuit

13‧‧‧Load contact closure/open circuit detection circuit

14‧‧‧Relay coil open circuit detection circuit

15‧‧‧Load switching circuit

16‧‧‧current/voltage sensing circuit

20‧‧‧Responsible relay

30‧‧‧Information Acquisition Card

41‧‧‧Human Machine Interface

40‧‧‧PC

411‧‧‧Mechanical life measurement

412‧‧‧ Electrical life measurement

413‧‧‧Starting voltage measurement

414‧‧‧Release voltage measurement

415‧‧‧Starting time measurement

416‧‧‧ release time measurement

417‧‧‧Contact pressure drop / resistance measurement

418‧‧‧ light display

401‧‧‧Drawdown menu

402‧‧‧Start button

403‧‧‧Start measuring the signal

404‧‧‧Measured completion number

The first figure is a system architecture diagram of the present invention.

The second figure is a configuration diagram of various measurement items of the human-machine interface of the present invention.

The third figure is a block diagram of the mechanical life measurement of the present invention.

The fourth figure is a flow chart of the mechanical life measurement program of the present invention.

Figure 5 is a block diagram of the electrical life measurement of the present invention.

Figure 6 is a flow chart of the electrical life measurement program of the present invention.

Figure 7 is a block diagram of the power-on/release voltage measurement of the present invention.

Figure 8 is a flow chart of the power-on/release voltage measurement program of the present invention.

Figure 9 is a block diagram of the start/release time measurement of the present invention.

Figure 10 is a flow chart of the start/release time measurement program of the present invention.

Figure 11 is a block diagram of the contact pressure drop measurement of the present invention.

Twelfth figure: is a flow chart of the contact pressure drop measurement program of the present invention.

10‧‧‧ boards

11‧‧‧Relay drive circuit

12‧‧‧No load contact closure/open circuit detection circuit

13‧‧‧Load contact closure/open circuit detection circuit

14‧‧‧Relay coil open circuit detection circuit

15‧‧‧Load switching circuit

16‧‧‧current/voltage sensing circuit

20‧‧‧Responsible relay

30‧‧‧Information Acquisition Card

41‧‧‧Human Machine Interface

40‧‧‧PC

Claims (4)

A relay measuring system is mainly provided with a relay driving circuit, a no-load contact closing/open circuit detecting circuit, a load contact closing/open circuit detecting circuit, and a relay coil breaking detection on a circuit board. The circuit and a current/voltage sensing circuit of the Hall current sensing component cooperate with a personal computer with a data acquisition card, a measurement program and a human-machine interface for the connection and coil connection of a relay to be tested The measurement of the mechanical life, electrical life, power-on voltage/release voltage, and power-on time/release time of the relay to be tested can be performed by forming a control loop, so that the measured data can be transmitted through the data acquisition card and the individual The computer's measurement program is displayed in a human-machine interface and archive. The mechanical life measurement system uses the relay drive circuit of the circuit board, the no-load contact closure/open circuit detection circuit, and the load contact closure/open circuit detection. The circuit is combined with the DI/DO of the data capture card to achieve the measurement. The life measurement of the electrical system is based on the relay coil of the circuit board to detect the circuit and the relay drive circuit and data acquisition. The DI/DO point is combined to achieve the measurement. The relay's power-on/release voltage measurement system is combined with the relay coil open circuit detection circuit and the relay drive circuit and the data acquisition card DO (PWM signal output)/DI to achieve Measurement, start/release time measurement is based on the relay mechanical contact open/close detection circuit of the circuit board and the relay drive circuit combined with the DI/DO point of the data capture card to achieve the relay power/release time measurement. The contact voltage drop/electrical resistance measurement system is based on the load contact closure/open circuit detection circuit of the circuit board, the relay drive circuit and a current/voltage sensing circuit of a Hall current sensing element and data acquisition. The AI (Analog Input) and DO points are combined to achieve the contact voltage drop/electrical resistance measurement, thereby using the measurement system to integrate the measurement items required by various relays to reduce the traditional relay measurement. The required inspection fee, which in turn enhances the company's products. Competitiveness. For example, in the relay measuring system described in claim 1, wherein the human-machine interface displayed by the personal computer is provided with mechanical life measurement, electrical life measurement, and power-on voltage from left to right and from top to bottom. , release voltage, power-on time, release time, and contact voltage drop/electrical resistance measurement items, etc., all the measurement items have a light number display, when the light number is displayed, the measurement item is in progress, For the measurement is completed, and at the upper right side, there is respectively a pull-down menu for selecting a measurement item, a start button, a start measurement lamp number and a measurement completion lamp number for operation. For example, the relay measuring system described in claim 1 is characterized in that a load switching circuit can be arranged on the circuit board to cooperate with the data capture card to control whether the contact of the relay to be tested is connected to the load circuit and can be treated. Test relay mechanical life measurement or no-load mechanical life measurement. For example, in the relay measuring system described in claim 1, wherein the personal computer measurement program and the human machine interface are completed by the LabVIEW software to automatically control all the measurement processes.