CN101403264B - Electronic cipher control circuit - Google Patents

Abstract

The invention relates to the technical field of control circuits, in particular to an electronic password control circuit, which comprises a password input circuit, a password determination circuit, an execution circuit and a power supply control circuit, wherein the output end of the password input circuit is connected with the input end of the password determination circuit, the output end of the password determination circuit is connected with the input end of the execution circuit, the output end of the power supply control circuit is respectively connected with the password input circuit, the password determination circuit and the power supply input end of the execution circuit, the password input circuit is formed by connecting a plurality of stages of password input unit circuits in series, one password input unit circuit corresponds to one password, and the password input unit circuit which inputs the password first controls the on-off of the power supply of the password input unit circuit which inputs the password first according to the input sequence of the password; the invention does not need to use a large-scale password integrated circuit and arrange a storage circuit specially used for storing passwords, and has simple circuit structure and lower manufacturing cost.

Description

Electronic password control circuit

Technical field:

The invention relates to the technical field of control circuits, in particular to an electronic password control circuit.

Background technique:

In daily life and work, the security of residences and departments, unit files, financial statements, and some personal data are mostly solved by locking. If the traditional mechanical key is used to unlock the lock, people often need to carry multiple keys, which is extremely inconvenient to use, and the security is greatly compromised when the key is lost. With the continuous development of science and technology, people have higher and higher requirements for safety devices in daily life. In order to meet people's requirements for the use of locks and increase their security, combination locks with passwords instead of keys have emerged as the times require.

Present combination locks are mainly divided into mechanical combination locks and electronic combination locks. The mechanical combination lock can only open the combination lock by turning the combination disk so that the number on the combination disk is the same as the set password. Due to the limitation of the size and weight of the mechanical combination lock, the combination of the password is less. Some people can judge the password according to the feel and sound, so the security is low; and the electronic combination lock that uses the keyboard to input the password has gradually replaced the traditional mechanical combination lock because of its convenient operation, large number of combination combinations and high security. At present, the electronic code control circuit adopted by the electronic code lock is mainly a digital circuit, such as the representative TWH9013 large-scale code integrated circuit. However, this electronic password control circuit needs to be provided with a storage circuit specially used for storing passwords. The circuit structure is complex and the manufacturing cost is high. Moreover, once the power supply to the control circuit is interrupted, the stored passwords are likely to be lost.

Invention content:

The purpose of the present invention is to provide an electronic password control circuit for the deficiencies in the prior art, which is designed according to the sequence control of the upper level password input unit circuit controlling the lower level password input unit circuit, the circuit structure is simple, and the manufacturing cost is low.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

It includes a password input circuit, a password determination circuit, an execution circuit, and a power control circuit. The output end of the password input circuit is connected to the input end of the password determination circuit, and the output end of the password determination circuit is connected to the input end of the execution circuit. The output end of the power control circuit is respectively connected with the power input end of the password input circuit, the password determination circuit, and the execution circuit. The password input circuit is composed of several levels of password input unit circuits connected in series, and one password input unit circuit corresponds to one password. For the input sequence of the password, the password input unit circuit that first inputs the password controls the on-off of the power supply of the password input unit circuit that inputs the password later.

The password input unit circuit includes a trigger circuit, a code circuit, a wrong code circuit, and a right-wrong code checking circuit; the input end of the trigger circuit is used for inputting power, and generates a trigger signal; the output end of the trigger circuit is connected with the The input end of the code circuit and the wrong code circuit is connected to trigger the code circuit or the wrong code circuit; the output end of the code circuit is connected to the input end of the trigger circuit of the next-level password input unit circuit for controlling The on-off of the code circuit power supply of the password input unit circuit of the next level; the input end of the correct and wrong code checking circuit is respectively connected with the output ends of the code circuit and the wrong code circuit, and is used to detect the code circuit and the wrong code circuit. The working state of the circuit is used to judge whether the password is correct or not; the output terminal of the correct or incorrect code checking circuit is connected to the input terminal of the password determination circuit for outputting a detection signal.

The password determination circuit includes a confirmation trigger circuit, a confirmation code circuit, a confirmation error code circuit, and a confirmation error code inspection circuit; the input terminal of the confirmation trigger circuit is connected with the output terminal of the power control circuit, and is used to generate a confirmation trigger signal ; The output end of the confirmation trigger circuit is connected with the input terminals of the confirmation code circuit and the confirmation error code circuit respectively, and is used to trigger the confirmation code circuit or the confirmation error code circuit; the input terminals of the confirmation error code inspection circuit are respectively It is connected with the output end of the confirming code circuit and the confirming wrong code circuit, and is used to detect and confirm the working status of the confirming code circuit and the confirming wrong code circuit, and judge whether all the passwords are input wrongly; It is connected with the input end of the execution circuit for outputting the detection signal and controlling the execution circuit.

The output terminal of the confirming code circuit is connected with a code output circuit, and a light-emitting diode is arranged in the code output circuit for displaying that the password is entered correctly.

The output end of the confirmation error code circuit is connected with an error code output circuit, and a light emitting diode is arranged in the error code output circuit for displaying password input errors.

The power supply control circuit includes a DC power supply circuit powered by a storage battery, a switching power supply circuit powered by an external AC power supply, and an output circuit. The output end of the switching power supply circuit is connected to the input terminal of the DC power supply circuit through a switch to charge the storage battery of the DC power supply circuit. The output end of the DC power supply circuit and the output end of the switching power supply circuit are connected with the input end of the output circuit, and the output end of the output circuit is connected with the power supply input end of the password input circuit, the password determination circuit and the execution circuit.

The beneficial effects of the present invention are:

The electronic password control circuit provided by the present invention includes a password input circuit, a password determination circuit, an execution circuit, and a power control circuit. The output end of the password input circuit is connected to the input end of the password determination circuit, and the output end of the password determination circuit is connected to the execution circuit. The input terminal of the power control circuit is connected to the input terminal of the power control circuit, and the output terminal of the power control circuit is respectively connected with the power supply input terminals of the password input circuit, the password determination circuit, and the execution circuit. The password input circuit is composed of several levels of password input unit circuits connected in series. A password input The unit circuit corresponds to a password. According to the input sequence of the password, the password input unit circuit that inputs the password first controls the power supply of the password input unit circuit that inputs the password, that is, the password input unit circuit of the upper level controls the power supply of the lower level in turn. The power supply of the password input unit circuit is turned on and off. As can be seen from the above technical solutions, as long as the decryptor enters the correct password in order, the power supply of the password input unit circuit at each level can be turned on and the circuit can work normally, and the password input unit circuit of the last level will drive the password to determine The circuit and the execution circuit unlock the password; however, when the decryptor enters a wrong password, starting from the password input unit circuit of the password, no matter whether the password input by the decryptor is correct or wrong, each level of password input unit after that The power supply of the circuit is not turned on, so that the decryptor cannot decrypt. Therefore, the present invention does not need to use a large-scale cryptographic integrated circuit and set up a storage circuit specially used for storing cryptograms, and the circuit structure of the present invention is simple and the manufacturing cost is low.

Description of drawings:

Fig. 1 is a structural block diagram of the present invention;

Fig. 2 is the circuit schematic diagram of the power supply control circuit of the present invention;

Fig. 3 is the circuit schematic diagram of password input circuit of the present invention;

Fig. 4 is the circuit schematic diagram of the password determination circuit of the present invention;

Fig. 5 is a schematic circuit diagram of the execution circuit of the present invention.

Detailed ways:

Below in conjunction with accompanying drawing, the present invention is further described, see Fig. 1, the electronic password control circuit that the present invention provides comprises password input circuit 1, password determination circuit 2, executive circuit 3, power supply control circuit 4, described password input circuit 1 The output end is connected with the input end of the password determination circuit 2, the output end of the password determination circuit 2 is connected with the input end of the execution circuit 3, and the output end of the power control circuit 4 is connected with the password input circuit 1, the password determination circuit 2, and the execution circuit respectively. The power input terminal of the circuit 3 is connected, and the password input circuit 1 is composed of several levels of password input unit circuits 11 connected in series, and one password input unit circuit 11 corresponds to a password. According to the input sequence of the password, the password input unit circuit that first inputs the password 11 controls the on-off of the power supply of the password input unit circuit 11 for inputting the password.

The password input unit circuit 11 of the present embodiment includes a trigger circuit 111, a code matching circuit 112, a wrong code circuit 113, and a right and wrong code checking circuit 114; the input terminal of the trigger circuit 111 is used for inputting power, and generates a trigger signal, and further Specifically, the input end of the trigger circuit 111 of the first level password input unit circuit 11 is connected with the output end of the power control circuit 4; terminal connection, for triggering the code circuit 112 or the wrong code circuit 113; the output terminal of the code circuit 112 is connected with the input end of the trigger circuit 111 of the next level password input unit circuit 11, for controlling the next level The on-off of the code circuit 112 power supply of the password input unit circuit 11; the input end of the correct and wrong code checking circuit 114 is connected with the output terminals of the code circuit 112 and the wrong code circuit 113 respectively, and is used to detect the code circuit 112 and the code circuit 112. The working state of the error code circuit 113 is to judge whether the password input is correct or not; the output terminal of the correct or incorrect code checking circuit 114 is connected with the input terminal of the password determination circuit 2 for outputting a detection signal.

The password determination circuit 2 of the present embodiment includes a confirmation trigger circuit 21, a confirmation code matching circuit 22, a confirmation error code circuit 23, and a confirmation right and wrong code checking circuit 24; the input terminal of the confirmation trigger circuit 21 and the output of the power control circuit 4 Terminal connection, for generating confirmation trigger signal; The output terminal of described confirmation trigger circuit 21 is respectively connected with the input end of confirming code circuit 22, confirmation error code circuit 23, is used for triggering confirmation code circuit 22 or confirmation error code circuit 23; the input end of the correct and wrong code checking circuit 24 is connected with the output end of the confirmed code circuit 22 and the confirmed wrong code circuit 23 respectively, and is used for detecting and confirming the operation status of the correct code circuit 22 and the confirmed wrong code circuit 23, Judge whether all passwords are entered correctly or incorrectly.

The output end of the confirmation code circuit 22 of the present embodiment is connected with a code output circuit 25, and a light-emitting diode is provided in the code output circuit 25, which is used to display that the password input is correct. When the password input is correct, the light-emitting diode is bright. Of course, other components or indicating circuits, such as a buzzer or a voice prompting circuit, can also be set in the code pairing output circuit 25 .

The output end of the confirmation error code circuit 23 of the present embodiment is connected with the error code output circuit 26, and after the right and wrong code checking circuit 114 of the password input unit circuit 11 of each level is connected in parallel, it is connected with the input end of the error code output circuit 26 Connect so that once the wrong code checking circuit 114 inputs the wrong code signal, the wrong code output circuit 26 will work, that is, a decryption error; the wrong code output circuit 26 is provided with a light-emitting diode, which is used to display a password input error, and when the password input error , the light-emitting diode lights up. Of course, other components or indicating circuits, such as a buzzer or an alarm circuit, can also be set in the error code output circuit 26.

The power supply control circuit 4 of the present embodiment comprises a DC power supply circuit 41 powered by a storage battery, a switching power supply circuit 42 and an output circuit 43 powered by an external AC power supply, and the output end of the switching power supply circuit 42 is connected to the input end of the DC power supply circuit 41 through a switch. , for the accumulator charging of DC power supply circuit 41; The output end of DC power supply circuit 41, the output end of switching power supply circuit 42 are all connected with the input end of output circuit 43, and the output end of output circuit 43 is connected with password input circuit 1, password determination circuit 2. Connect the power supply input end of the execution circuit 3.

As shown in Fig. 2, the power control circuit 4 includes a storage battery E1, a switching power supply module E2, fuses F1-F3, diodes D1, light-emitting diodes LED1, LED2, resistors R24-R27, capacitors C10, C11, CA1, CA2, and transistors VT1, VT2, three-terminal regulator U1, DC power switches Q1, Q2, terminal plugs J1~J15; when the DC power switch Q1 (or Q2) is turned on, the base current of the triode VT1 (or VT2) is limited After resistor R24 (or R26), light-emitting diode LED1 (or LED2), and DC power switch Q1 (or Q2), it flows to the negative pole of the power supply. The base current of this triode VT1 (or VT2) must be able to make the light-emitting diode LED1 (or LED2) Light up (indicating that the DC power supply is turned on), and at the same time make the triode VT1 (or VT2) in a saturated state in order to provide sufficient output current; after the triode VT1 (or VT2) is turned on, the three-terminal regulator U1 will have Input voltage, so the output terminal of the three-terminal regulator U1 will output a stable DC voltage, which is mainly supplied to the password input circuit 1 and the password determination circuit 2 .

See Fig. 3, described password input circuit 1 is made up of several levels of password input unit circuits 11 connected in series, because the circuit structure of each password input unit circuit 11 is the same, so only the password input unit of the first level is shown in Fig. 3 Circuit schematic diagram of the circuit 11 and the password input unit circuit 11 of the last level (n level), wherein the password input unit circuit 11 of the first level includes resistors R1A～R1H, capacitors C1A～C1D, diodes D1A～D1D, light emitting diodes LED1A, one-way thyristors T1A~T1D, optical coupling chips U1A~U1D, input button K1A, terminal plugs J1A, J1B; the working principle of the password input circuit 1: assume that the input sequence of the preset password is K1A, K2A... ...KnA, when the input button K1A of the password input unit circuit 11 of the first level is pressed, the password input unit circuit 11 of the first level is in the code pairing state, because the capacitance C1A<(C1C+C1D)<C1B, one-way Thyristors T1A, T1C, and T1B will be triggered to conduct sequentially after being delayed by the capacitor, and the conduction of T1A, T1C, and T1B will trigger the conduction of the optical coupling chips U1B, U1D, and U1C in turn. Since the optical coupling chip U1B is ahead of U1D is connected, so that the trigger current of T1D is bypassed by U1B, so that T1D is cut off, that is, the right and wrong code checking circuit 114 of the password input unit circuit 11 of the first stage will not output the trigger signal of the wrong code; at the same time, due to the lead of U1C pass, so that the input power of the password input unit circuit 11 of the second level is turned on, at this moment, as long as the input button K2A of the password input unit circuit 11 of the second level is pressed, the password input unit circuit 11 of the third level The input power is turned on, and according to the order of the passwords, and so on, until the input button KnA of the password input unit circuit 11 of the last level is pressed, the password is correctly decrypted; or first press the input button K2A of the password input unit circuit 11 of the second level, that is, the password input unit circuit 11 of the second level is in the wrong code state, wherein, after the one-way thyristors T2A, T2C, and T2B are delayed by the capacitor , will trigger conduction in turn, but since K1A is not pressed, the optocoupler chips U2B and U2C will not be turned on without input power, only the optocoupler chip U2D will be turned on when triggered by T2C, and U2D will Trigger T2D to be turned on, so that the right and wrong code checking circuit 114 of the password input unit circuit 11 of the second stage outputs the trigger signal of the wrong code; at the same time, due to the non-conduction of U2C, after the password input unit circuit 11 of the second stage The input power of the password input unit circuit 11 will not be turned on, that is, no matter the decryptor presses any button from K3A to KnA afterwards, the password input unit circuit 11 will be in a wrong code state, so that the decryptor cannot decrypt. Of course, if the decryptor inputs two or more passwords at the same time, each password input unit circuit 11 will be in a code error state due to the delay effect of the capacitor in the password input unit circuit 11, so that the decryptor still cannot decrypt. In addition, because the circuit structure of the password input unit circuit 11 of the password input circuit 1 of the present embodiment is the same and connected in series, so as long as the connection sequence of the password input unit circuits 11 at all levels is adjusted, the order of password setting can be changed; As long as the password input unit circuit 11 is increased or decreased, the number of passwords can also be increased or decreased.

As shown in Fig. 4, the password determination circuit 2 includes resistors R1_Q-R21_Q, capacitors C1_Q-C8_Q, diodes D1_Q-D6_Q, transistors VT1_Q, light-emitting diodes LED1_Q-LED3_Q, one-way thyristors T1_Q-T7_Q, and optical coupling chips U1_Q-U9_Q , confirmation button K1_Q, terminal plug J1_Q; when the decryptor finishes inputting the password, he needs to press the confirmation button K1_Q to drive the execution circuit 3; if the password input by the decryptor is correct, the password determination circuit 2 is in the code matching state, Since the capacitance C1_Q<(C3_Q+C4_Q), T1_Q is turned on before T4_Q, because (C2_Q+C5_Q)<(C3_Q+C8_Q), so T5_Q is turned on before T7_Q, because the one-way thyristor T1_Q is turned on before T4_Q, that is The optical coupling chip U1_Q is turned on earlier than U4_Q, so that the trigger current of T4_Q is bypassed by U2_Q, so that T4_Q is cut off, that is, it is confirmed that the right and wrong code checking circuit 24 will not output the trigger signal of the wrong code, so T7_1 is cut off, and the wrong code output circuit 26 does not work; at the same time, due to the conduction of U3_Q, T5_Q is conducted, the code output circuit 25 works, the light-emitting diode LED2_Q lights up, prompting that the password is entered correctly, and the execution circuit 3 is driven by the optical coupling chip U8_Q to work. If the password input by the decryptor is wrong, then the password determination circuit 2 is in the wrong code state, the input power of the password determination circuit 2 is not conducting, when the decryptor presses the confirmation button K1_Q, T1_Q, T2_Q are not conducting, that is, U2_Q , U3_Q is not conducting, so it is confirmed that the code matching circuit 22 does not work, so that the code matching output circuit 25 does not work, and the execution circuit 3 cannot be driven to work. However, it is confirmed that the T3_Q of the wrong code circuit 23 is conducting, that is, U4_Q and U5_Q are conducting , so that T7_Q is turned on, the error code output circuit 26 works, and the light emitting diode LED3_Q lights up, prompting that the password is entered incorrectly. Certainly, if when pressing input button K1A and determination button K1_Q simultaneously, confirm that right and wrong code check circuit 24 outputs wrong code signal, this is due to (C3_Q+C4_Q)<(C1B+C1_Q), so T4_Q is conducted earlier than T1_Q, once T4_Q is turned on, and U6_Q is also turned on. After being delayed by C7_Q, T6_Q is turned on. After T6_Q is turned on, the trigger potential of T5_Q will change from high potential to low potential. At this time, the charge of C6_Q begins to pass through the gate of T5_Q Discharge to the cathode until the discharge current is zero. At this time, the discharge time of C6_Q should be less than the charge delay time of (C1B+C2_Q+C5_Q). At this time, T5_Q ends, that is, it is confirmed that the code output circuit 25 does not work and cannot be driven and executed. Circuit 3 works.

As shown in Fig. 5, the execution circuit 3 includes resistors R22_Z to R24_Z, capacitor C9_Z, diode D7_Z, transistor VT2_Z, light emitting diode LED4_Z, execution button K2_Z, terminal plug J1_Z, and an electric control lock 5 connected to the output end of the execution circuit 3; The OUT1+ and OUT- input ports connected to the terminal plug J1_Z provide power for the executive circuit 3. When the password input by the decryptor is correct, the password confirms that the optical coupling chip U8_Q in the circuit 2 is turned on, that is, the input port 8Q_1 of the executive circuit 3 Conducting with 8Q_2, so that the transistor VT2_Z obtains the base current and conducts. At this time, as long as the execution button K2_Z is pressed, the light-emitting diode LED4_Z is lit, and the electric control lock 5 is opened. Of course, in this embodiment, in addition to the electric control Outside the lock 5, other equipment controlled by the password control circuit can also be selected for use, such as solenoid valves, relays and the like.

Of course, the above descriptions are only preferred embodiments of the present invention, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (6)

1. electronic password control circuit; It comprises that password input circuit, password confirm circuit, executive circuit, power control circuit; The output of said password input circuit confirms that with password the input of circuit is connected; Password confirms that the output of circuit is connected with the input of executive circuit; The output of said power control circuit confirms that with password input circuit, password the power input of circuit, executive circuit is connected, and is characterized in that respectively: said password input circuit is composed in series by some grades password input-cell circuitry, the corresponding password of password input-cell circuitry; According to the input sequence of password, the break-make of the power supply of the password input-cell circuitry of input password after the password input-cell circuitry of input password is controlled earlier;

Said password input circuit is composed in series by some grades password input-cell circuitry; Wherein, the password input-cell circuitry of the first order comprises resistance R 1A, resistance R 1B, resistance R 1C, resistance R 1D, resistance R 1E, resistance R 1F, resistance R 1G, resistance R 1H, capacitor C 1A, capacitor C 1B, capacitor C 1C, capacitor C 1D, diode D1A, diode D1B, diode D1C, diode D1D, LED 1A, one-way SCR T1A, one-way SCR T1B, one-way SCR T1C, one-way SCR T1D, optically-coupled chip U1A, optically-coupled chip U1B, optically-coupled chip U1C, optically-coupled chip U1D, load button K1A, terminal plug J1A, J1B; The operating principle of said password input circuit: the input sequence of supposing preset password is K1A, K2A ... KnA; When the load button K1A of the password input-cell circuitry of the first order is pressed; The password input-cell circuitry of the first order is in the sign indicating number state, and < (C1C+C1D) < C1B is after one-way SCR T1A, T1C, T1B are delayed time by electric capacity owing to capacitor C 1A; To triggering and conducting successively; The conducting meeting of T1A, T1C, T1B triggers optically-coupled chip U1B, U1D, U1C conducting successively, because optically-coupled chip U1B than the first conducting of U1D, makes the trigger current of T1D bypassed by U1B; Thereby T1D is ended, and promptly the password input-cell circuitry of the first order can not export the triggering signal of error code to the error code checking circuit; Simultaneously, because the conducting of U1C, make the input power turn-on of partial password input-cell circuitry; At this moment; As long as the load button K2A of partial password input-cell circuitry is pressed, the input power turn-on of the password input-cell circuitry of the third level then is according to putting in order of password; Load button KnA until the password input-cell circuitry of afterbody is pressed, and then password is by correct deciphering; When deciphering person not according to order when inputing password, press the load button K2A of partial password input-cell circuitry earlier like deciphering person, promptly partial password input-cell circuitry is in the error code state; Wherein, one-way SCR T2A, T2C, T2B incite somebody to action triggering and conducting successively after being delayed time by electric capacity; But; Because K1A is not pressed, so optically-coupled chip U2B, U2C does not obtain importing power supply and can conducting, has only optically-coupled chip U2D by the T2C triggering and conducting; And the conducting meeting of U2D triggers the T2D conducting, thereby makes the triggering signal to error code checking circuit output error code of partial password input-cell circuitry; Simultaneously; The conducting that do not have owing to U2C; Make that the input power supply of the password input-cell circuitry after the partial password input-cell circuitry all can conducting; No matter promptly press any one button among the K3A to KnA after the deciphering person, this password input-cell circuitry all can be in the error code state, makes deciphering person to decipher;

Said password confirms that circuit comprises resistance R 1_Q; Resistance R 2_Q; Resistance R 3_Q; Resistance R 4_Q; Resistance R 5_Q; Resistance R 6_Q; Resistance R 7_Q; Resistance R 8_Q; Resistance R 9_Q; Resistance R 10_Q; Resistance R 11_Q; Resistance R 12_Q; Resistance R 13_Q; Resistance R 14_Q; Resistance R 15_Q; Resistance R 16_Q; Resistance R 17_Q; Resistance R 18_Q; Resistance R 19_Q; Resistance R 20_Q; Resistance R 21_Q; Capacitor C 1_Q; Capacitor C 2_Q; Capacitor C 3_Q; Capacitor C 4_Q; Capacitor C 5_Q; Capacitor C 6_Q; Capacitor C 7_Q; Capacitor C 8_Q; Diode D1_Q; Diode D2_Q; Diode D3_Q; Diode D4_Q; Diode D5_Q; Diode D6_Q; Triode VT1_Q; LED 1_Q; LED 2_Q; LED 3_Q; One-way SCR T1_Q; One-way SCR T2_Q; One-way SCR T3_Q; One-way SCR T4_Q; One-way SCR T5_Q; One-way SCR T6_Q; One-way SCR T7_Q; Optically-coupled chip U1_Q; Optically-coupled chip U2_Q; Optically-coupled chip U3_Q; Optically-coupled chip U4_Q; Optically-coupled chip U5_Q; Optically-coupled chip U6_Q; Optically-coupled chip U7_Q; Optically-coupled chip U8_Q; Optically-coupled chip U9_Q; Confirming button K1_Q; Terminal plug J1_Q; After deciphering person inputs password and finishes, need press confirming button K1_Q, could the driving execution circuit; If the password of deciphering person's input is correct, then password confirms that circuit is in the sign indicating number state, because capacitor C 1_Q < (C3_Q+C4_Q); So T1_Q is than the first conducting of T4_Q because (C2_Q+C5_Q) (C3_Q+C8_Q), thus T5_Q than the first conducting of T7_Q; Because one-way SCR T1_Q is than the first conducting of T4_Q, promptly optically-coupled chip U1_Q makes the trigger current of T4_Q bypassed by U2_Q than the first conducting of U4_Q; Thereby T4_Q is ended; Promptly confirm can not export the error code checking circuit triggering signal of error code, so T7_1 ends, the error code output circuit is not worked; Simultaneously, because the conducting of U3_Q, make the T5_Q conducting, the sign indicating number output circuit is worked; LED 2_Q lights, and the prompt cipher input is correct, and by optically-coupled chip U8_Q driving execution circuit working, if the password of deciphering person's input is wrong; Then password confirms that circuit is in the error code state, and password is confirmed the not conducting of input power supply of circuit, when deciphering person presses confirming button K1_Q, and T1_Q, not conducting of T2_Q; Be U2_Q, not conducting of U3_Q,, make the sign indicating number output circuit is not worked yet so confirm decoding circuit is not worked, can't the driving execution circuit working; But, confirm the T3_Q conducting of error code circuit, i.e. U4_Q, U5_Q conducting makes the T7_Q conducting; The work of error code output circuit, LED 3_Q lights, the prompt cipher input error, certainly; If when pressing load button K1A and confirming button K1_Q simultaneously, confirm error code checking circuit output error code signal, this be because (C3_Q+C4_Q) (C1B+C1_Q), thus T4_Q than the first conducting of T1_Q; In case the T4_Q conducting, U6_Q is also along with conducting, and by after the C7_Q time-delay, the T6_Q conducting; Can make the evoked potential of T5_Q turn to electronegative potential from high potential after the T6_Q conducting, at this moment, the electric charge of C6_Q begins gate pole through T5_Q to cathodic discharge, is zero up to discharge current; At this moment the discharge time of C6_Q should be less than the charging delay time of (C1B+ C2_Q+C5_Q), and this moment, T5_Q ended, and promptly confirms the sign indicating number output circuit is not worked, can't the driving execution circuit working;

Described power control circuit comprises battery E1; Switch power module E2; Protective tube F1; Protective tube F2; Protective tube F3; Diode D1; LED 1; LED2; Resistance R 24; Resistance R 25; Resistance R 26; Resistance R 27; Capacitor C 10; C11; CA1; CA2; Triode VT1; VT2; Three-terminal voltage-stabilizing pipe U1; DC power supply switch Q1; Q2; Terminal plug J1; Terminal plug J2; Terminal plug J3; Terminal plug J4; Terminal plug J5; Terminal plug J6; Terminal plug J7; Terminal plug J8; Terminal plug J9; Terminal plug J10; Terminal plug J11; Terminal plug J12; Terminal plug J13; Terminal plug J14; Terminal plug J15; After DC power supply switch Q1 or Q2 are opened; The base current of triode VT1 or VT2 is behind current-limiting resistance R24 or R26, LED 1 or LED2, DC power supply switch Q1 or Q2; Flow to power cathode; The base current of this triode VT1 or VT2 must be able to make LED 1 or LED2 light the conducting of indication dc source, also will make triode VT1 or VT2 be in saturation state simultaneously, so that enough output currents are provided; After triode VT1 or the VT2 conducting, three-terminal voltage-stabilizing pipe U1 has just had input voltage, presses so the output of three-terminal voltage-stabilizing pipe U1 can be exported a galvanic current, and this voltage is mainly supplied with the password input circuit, password is confirmed circuit;

Said executive circuit comprises resistance R 22_Z, resistance R 23_Z, resistance R 24_Z, capacitor C 9_Z, diode D7_Z, triode VT2_Z, LED 4_Z, executive button K2_Z, terminal plug J1_Z, the electric control lock that is connected with the executive circuit output; OUT1+ and OUT-input port that said terminal plug J1_Z connects are that executive circuit provides power supply, and when the password of importing as deciphering person was correct, password was confirmed the optically-coupled chip U8_Q conducting in the circuit; Be the input port 8Q_1 and the 8Q_2 conducting of executive circuit; Make acquisition base current and the conducting of triode VT2_Z, at this moment, as long as press executive button K2_Z; LED 4_Z lights, and electric control lock is opened.

2. electronic password control circuit according to claim 1 is characterized in that: said password input-cell circuitry comprises circuits for triggering, to decoding circuit, error code circuit, to the error code checking circuit; The input of said circuits for triggering is used to import power supply, and produces triggering signal; The output of said circuits for triggering is connected with input to decoding circuit, error code circuit respectively, is used for triggering to decoding circuit or error code circuit; Said output to decoding circuit is connected with the input of the circuits for triggering of next stage password input-cell circuitry, is used to control the break-make to the decoding circuit power supply of the password input-cell circuitry of next stage; Said input to the error code checking circuit is connected with output to decoding circuit, error code circuit respectively, is used to detect the duty to decoding circuit and error code circuit, judges the wrong right of password input; Said output to the error code checking circuit confirms that with password the input of circuit is connected, and is used for output detection signal.

3. electronic password control circuit according to claim 1 is characterized in that: said password confirms that circuit comprises the affirmation circuits for triggering, confirms decoding circuit, confirms the error code circuit, confirms the error code checking circuit; The input of said affirmation circuits for triggering is connected with the output of power control circuit, is used for producing the affirmation triggering signal; The output of said affirmation circuits for triggering is connected with confirming the input to decoding circuit, affirmation error code circuit respectively, is used for triggering confirming decoding circuit or affirmation error code circuit; Said affirmation is connected with confirming the output to decoding circuit, affirmation error code circuit respectively the input of error code checking circuit, is used to detect affirmation to decoding circuit and the duty of confirming the error code circuit, judges the wrong right of whole passwords inputs; Said affirmation is connected with the input of executive circuit the output of error code checking circuit, is used for output detection signal, and the control executive circuit.

4. electronic password control circuit according to claim 3 is characterized in that: said affirmation is connected with the sign indicating number output circuit the output of decoding circuit, and to being provided with light emitting diode in the sign indicating number output circuit, it is correct to be used for the display password input.

5. electronic password control circuit according to claim 3 is characterized in that: the output of said affirmation error code circuit is connected with the error code output circuit, is provided with light emitting diode in the error code output circuit, is used for the display password input error.

6. electronic password control circuit according to claim 1; It is characterized in that: said power control circuit comprises with battery-driven DC power supply circuit, with external AC powered switch power circuit, output circuit; The output of switching power circuit is connected with the input of DC power supply circuit through switch, is the charge in batteries of DC power supply circuit; The output of DC power supply circuit, the output of switching power circuit all are connected with the input of output circuit, and the output of output circuit confirms that with password input circuit, password the power input of circuit, executive circuit is connected.

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