CN101806168B - Intelligent master key for electric undertaking - Google Patents

Abstract

The invention discloses an intelligent master key for electric industry, which comprises a key body and a data display part arranged in the key body, the data display part includes a power supply, a photoelectric counting touch mechanism, a counting chip and a counting display mechanism, the photoelectric The counting trigger mechanism includes a marble arranged on the key body, and a push rod connected with the marble. The push rod moves to touch the counting chip, so that the infrared light-emitting diode emits infrared light. Because the present invention is provided with the data display mechanism in the key body. With this device, after using the master key every time, the evidence of using this time will be displayed on the key, and then it will be recorded. After that, through the change of the data on the counter, you can know the number of times the master key has been used, and using the key without permission will naturally leave obvious evidence, so that the use of the master key can be effectively controlled.

Description

Smart master key for electrical industry

technical field

The invention belongs to the technical field of auxiliary supplies for power supply safety, and in particular relates to an intelligent master key for electric industry. the

Background technique

In the switching operation of power system substation equipment outage and power transmission, in order to avoid large-scale power outage accidents due to human factors, a complete set of operating procedures is required. Sequentially designed a set of locking procedures, technically guaranteeing that the next step cannot be performed when the previous step is not completed. However, due to the aging and rusting of the locking equipment during operation, problems such as being stuck and unable to be opened or the sequential key cannot be inserted into the locking equipment when opening, the power supply system ensures that the equipment in all areas can be locked under special circumstances. To open, there is generally a set of keys that can open all control devices, commonly known as master keys. However, in order to prevent operators from operating in accordance with the established operating procedures, unauthorized use of the master key to operate and cause power grid accidents. The conventional practice is: store the master key in the cabinet, and seal it with a lead seal or a seal stamped by the management department. The lead seal and seal will be collected from the substation to the management department. Close up. But there are still the following problems: first, lead seals can be purchased, and the management department cannot actually control the amount used; second, the statistics and records of lead seals and seals are more troublesome, and there are too many substations, and the management personnel cannot check them out when they arrive at the station How many seals and seals are used at the station, and there are issues of missing or damaged seals and seals. As a result, the higher-level power supply management department cannot well control the actual use times of the master key, resulting in certain security uncertainties. the

Contents of the invention

The invention provides an intelligent master key for electric industry which can automatically display the number of times of use. the

An intelligent master key for electric industry, comprising a key body and a data display part arranged in the key body, the data display part includes a power supply, a photoelectric counting and actuating mechanism, a counting chip and a counting and displaying mechanism, and the photoelectric counting and actuating mechanism includes A marble arranged on the key body, and a push rod connected with the marble, the push rod moves to touch the counting chip, so that the infrared light-emitting diode emits infrared light. the

Because the present invention displays the number of times of use by being arranged in the data display mechanism in the key body. After the key is inserted into the lock hole, when the marble on the key body touches the lock body, under the pressure of the lock hole, it will move inward along the limit hole, push the push block, touch the counting chip, and make the infrared The light-emitting diode emits infrared light, and then makes the counting part count. Make when the key withdraws from the lock hole, the marble resets under the action of the spring. With this device, after using the master key every time, the evidence of using this time will be displayed on the key, and then it will be recorded. After that, through the change of the data on the counter, you can know the number of times the master key has been used, and using the key without permission will naturally leave obvious evidence, so that the use of the master key can be effectively controlled. the

Description of drawings

Below in conjunction with accompanying drawing, the technical scheme of smart master key for electric industry of the present invention is further described:

Fig. 1 is the structural representation of intelligent master key for electric industry of the present invention;

Fig. 2 is a schematic diagram of the counting chip of the intelligent master key for electric industry of the present invention. the

Detailed ways

As shown in Fig. 1 and Fig. 2, an intelligent master key for electric industry includes a key body 1 and a data display part arranged in the key body, and the data display part includes a power supply 5, a photoelectric counting touch mechanism, a counting chip and Counting display mechanism 4, the photoelectric counting touch mechanism includes a marble 2 arranged on the key body 1, and a push rod 3 connected to the marble 2, the push rod 3 moves to touch the counting chip, so that the infrared light emitting diode emits infrared light. the

After the key is inserted into the lock hole, when the marble on the key body touches the lock body, under the pressure of the lock hole, it will move inward along the limit hole, push the push block, touch the counting chip, and make the infrared The light-emitting diode emits infrared light. When the phototransistor VT1 receives the infrared light from the infrared light-emitting diode VD1, its bright current increases, the internal resistance decreases, and the collector outputs a low level. This low level is added to the inverting input pin 6 of the voltage comparator IC2-B, and at the same time because the non-inverting input pin 5 of IC2-B is electrically connected by R3 and R4

After the resistance is divided, the voltage is 4.5V, so the voltage of pin 6 is less than that of pin 5. Pin 7 of IC2-B outputs high level. This high level is added to pin 2 of the inverting input terminal of comparator IC2-A, so that the voltage of pin 2 is higher than the voltage of pin 3 of the non-inverting input terminal, and the output of pin 1 of comparator IC2-A is low level. Make the built-in light-emitting tube of the photocoupler light up, the corresponding photosensitive tube is turned on, the triode VT2 is also turned on, and the collector of VT2 outputs a low level. When an object passes between the infrared light-emitting diode VD1 and the receiving tube VT1, the infrared rays are blocked, and the dark current of VT1 is less than 0.3μA because of no light, and the collector outputs a high level. Because the voltage of pin 6 of comparator IC2-B is greater than the voltage of pin 5, pin 7 of the comparator outputs low level, and the voltage of pin 2 of comparator IC2-A is also lower than the voltage of pin 3, so that the output of pin 1 is high, and the photoelectric The coupler is cut off, the transistor VT2 is also cut off, and the collector of VT2 outputs a high level. It can be seen from the above that when an object passes through VT1, the count pulse signal is output on the collector of VT2. the

The count display chip adopts CD4518 to form 8421 code synchronous decimal counter, and counts the falling edge of pulse signal output by VT2 collector. In order to meet the requirements of falling edge counting, the cp terminal of CD4518 needs to be grounded, and the counting pulse signal is connected to the EN input terminal. Because the CD4518 contains two identical counters, the Q4 output of the first stage can be connected to the EN terminal of the second stage to form a two-stage serial counting and realize the counting display of 0-99. The 7th and 15th pins of CD4518 are the clearing terminal Cr, which is grounded to zero level through the resistor R12, and realizes the power-on zeroing function together with the capacitor C4. The decoding circuit uses two pieces of CD4543 to form a BCD7-segment decoder to drive the LED digital display. Resistors R13-R26 are current limiting resistors. the

In the present invention, the voltage comparator is LM393 with low power consumption and low offset; the optocoupler is 4N35 or TIL117; the triode VT2 is 2SC218; IC3 is CD4518; IC4 and IC5 are CIM543. The digital display adopts common cathode WD506C. VD1 is the infrared light-emitting diode SE303; VT1 is the 3DU12 phototransistor. All resistors are (1/8)W metal film resistors. the

Manufacture and debugging It is required that the light-emitting tube and the receiving tube face each other, and at the same time, in order to avoid miscounting caused by natural light interference, a black cylinder should be placed on the receiving tube as a shading tube. The counter can realize the counting display of 0~99. If you want to increase the number of counting digits, you can directly expand the counting display part. the

Because the present invention displays the number of times of use by being arranged in the data display mechanism in the key body. After the key is inserted into the lock hole, when the marble on the key body hits the lock body, under the pressure of the lock hole, it will move inward along the limit hole, push the push block, touch the counting chip, and make the infrared The light-emitting diode emits infrared light, and then makes the counting part count. Make when the key withdraws from the lock hole, the marble resets under the action of the spring. With this device, after using the master key every time, the evidence of using this time will be displayed on the key, and then it will be recorded. After that, through the change of the data on the counter, you can know the number of times the master key has been used, and using the key without permission will naturally leave obvious evidence, so that the use of the master key can be effectively controlled.

Claims (1)

1. An intelligent master key for electric industry, comprising a key body and a data display part arranged in the key body, characterized in that: the data display part includes a power supply, a photoelectric counting touch mechanism, a counting chip and a counting display mechanism, the The photoelectric counting and triggering mechanism includes a marble arranged on the key body and a push rod connected with the marble. After the key is inserted into the lock hole, when the marble on the key body touches the lock body, it will press against the lock hole. When the first phototransistor receives the infrared light from the infrared light-emitting diode, its The bright current increases, the internal resistance decreases, and the collector outputs a low level. This low level is added to the inverting input terminal 6 of the voltage comparator B, and because the non-inverting input terminal 5 of the voltage comparator B passes through the adjacent After the two resistors divide the voltage, the voltage is 4.5V, so the voltage at pin 6 is less than the voltage at pin 5, and pin 7 of voltage comparator B outputs a high level, and this high level is added to pin 2 of the inverting input terminal of voltage comparator A , so that the voltage of pin 2 is higher than the voltage of pin 3 of the non-inverting input terminal, and the output of pin 1 of the voltage comparator A is low level. The second triode is also turned on, and the collector of the second triode outputs a low level. When an object passes between the infrared light-emitting diode and the first phototransistor, the infrared rays are blocked by the passing object, and the first phototransistor has no light. , its dark current is less than 0.3μA, the collector outputs high level, because the voltage of pin 6 of voltage comparator B is greater than the voltage of pin 5, the voltage of pin 7 of voltage comparator B outputs low level, and the voltage of pin 2 of voltage comparator A is the same If the voltage of pin 3 is less than the voltage of pin 1, the output of pin 1 is high level, the photocoupler is cut off, the second triode is also cut off, and the collector of the second triode outputs high level. It can be seen from the above that when an object passes through the first photosensitive When the triode is used, the counting pulse signal is output on the collector of the second triode to visually display the counting action.

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